KR101889003B1 - Control system for face velocity of fume hood - Google Patents

Abstract

The present invention relates to a face velocity control fume hood system capable of purifying harmful gases. The face velocity control fume hood system comprises: a body part (100); a dust collecting part (200); and a control part (300). The present invention can minimize an unnecessary energy loss while prudentially protecting an experimenter.

Description

{Control system for face velocity of fume hood}

The present invention relates to a method and apparatus for actively varying the surface wind speed according to the presence or absence of an experimenter to minimize the unnecessary waste of energy while protecting the safety of the experimenter and using the hood main body in the process of replacing the filter used for cleaning the harmful gas To a harmful gas cleanable surface wind speed control fume hood system capable of safely staying the harmful gas for a predetermined time without leakage.

Generally, fume hoods are used in laboratories that use chemicals that can harm the human body or pollute the environment to protect the experimenter and to prevent contamination of air in the laboratory.

The fume hood is provided with a door for opening and closing the experimental space while allowing an experiment space in which the experiment can be performed and allowing reagents and samples to enter and exit the front surface, and an exhaust fan and a damper The exhaust duct is connected to exhaust the harmful gas generated in the experimental space during the experiment.

Since the fume hood is installed in a laboratory in which a lot of noxious gas is generated due to the use of various chemicals, it needs to be more exhausted as compared with a general hood used in a kitchen or the like. The average wind speed flowing through the front surface of the fume hood, the face velocity is defined to be equal to or greater than a predetermined value.

Accordingly, in the conventional fume hood, by adjusting the rotational speed of the exhaust fan and the opening angle of the damper, the surface wind speed of the fume hood is maintained at the set surface wind speed A surface wind speed control system for controlling the surface wind speed is implemented, and Korean Patent No. 10-1085512 is disclosed in the prior art.

However, if the surface wind speed is set too low, the noxious gas can not be properly exhausted. Therefore, it is inevitably vulnerable to the protection of the experimenter. On the other hand, if the surface wind speed is excessively set, unnecessary power consumption is increased, The indoor / outdoor air inside the laboratory is excessively exhausted, resulting in energy loss.

In addition, in the case of fume hoods used in laboratories, harmful gases introduced from each laboratory are collected and purified even if the fume hood is not equipped with a separate purification facility, It is practically difficult to install the purification facility in a small-scale laboratory. Therefore, the harmful gas is purified and discharged through the filter. In this case, when the filter is replaced, the use of the fume hood There is an inconvenience that it must be used in a stopped state.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to minimize unnecessary energy loss while ensuring the protection of an experimenter by controlling surface wind speeds differently depending on presence or absence of an experimenter.

In addition, there is a dust collecting means that can purify noxious gas easily even in a small-scale laboratory where no expensive purification facilities are equipped, but even in the process of replacing the filter of the dust collecting means, the noxious gas is continuously and safely used, But there is another purpose.

In order to solve the above-described technical problems, the present invention provides a fume hood system for purifying harmful gas, comprising: a fume hood for discharging harmful gas generated in an experimental space, A body portion formed in the opening to communicate with the opening formed in the opening portion and being rotatably or slidably mounted on the opening portion to open and close the experimental space portion; And a control unit for controlling the main body and the dust collecting unit, wherein the dust collecting unit has a predetermined length and has one end communicated with the experimental space unit, An exhaust pipe connected to the exhaust pipe, and an exhaust pipe connected to the exhaust pipe, A bracket member detachably coupled to the outer surface of the main body and configured to allow the filter member to move in and out of the main body, And an opening and closing member provided on the bracket member and capable of staying in the exhaust pipe for a predetermined time period when the exhaust pipe and the filter member are separated from each other and the noxious gas sucked by the main body portion is separated from the exhaust pipe, A reference wind speed setting unit for setting a reference wind speed Vref of the main body unit, and a reference wind speed setting unit for setting a reference wind speed of the main body to be greater than a reference wind speed An augmented wind speed setting unit for setting and storing an augmented wind speed Vup having a wind speed, A first controller installed in the main body, a purging sensor installed in the bracket member for measuring the degree of contamination of the noxious gas which has been purged, a measurement sensor provided in the purging sensor, And a second controller installed on the bracket member, wherein the second controller includes an operation setting unit that compares the values of the first and second filter members to determine whether the filter member is replaced.

The opening and closing member may include a cylinder fixed to the bracket member and configured to be able to raise and lower the rod by the atmospheric pressure or the hydraulic pressure provided by the filter member, and a plate-shaped upper portion fixedly coupled to the lower portion of the rod, Closing plate for blocking the noxious gas moving to the filter member by opening and closing the inside of the exhaust pipe by raising and lowering the exhaust pipe, and for allowing the noxious gas to stay in the exhaust pipe for a predetermined time after the blocking is performed, A nozzle provided on the outer surface of the exhaust pipe so as to communicate with the inside of the exhaust pipe and capable of sucking the noxious gas staying inside the exhaust pipe by a predetermined discharge pressure after the opening and closing plate is raised toward the filter member, .

According to the present invention, the human body sensing unit can variably control the surface wind speed of the hood main body to the reference wind speed and the augmented wind speed in accordance with the presence or absence of an experimenter in the human sensing unit, thereby minimizing unnecessary energy loss So that it is possible to efficiently exhaust the fume hood.

In addition, a dust collecting unit having a filter member capable of purifying noxious gas is provided at one side of the hood main body so as to discriminate the noxious gas from the conventional one. When the filter is replaced, a predetermined amount of noxious gas is discharged through the exhaust pipe The filter can be replaced while staying in the filter for a predetermined period of time, so that the filter can be safely replaced and used without any leakage of the harmful gas.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view of a fume hood system for controlling harmful gases according to the present invention; FIG.
2 is a view illustrating a hood main body of a fume hood system for controlling a noxious gas purifying surface wind speed according to the present invention.
3 is a view illustrating a dust collecting part of a fume hood system for controlling harmful gas according to the present invention.
Fig. 4 is a view showing a filter member and an opening and closing member according to Fig. 3; Fig.
Figure 5 is a cross-sectional view of the filter of the filter element of Figure 4;
Fig. 6 is a view of the movement of the decontamination gas which is purified via the filter of Fig. 3; Fig.
FIG. 7 is a view showing a state in which a noxious gas stays in operation of the opening and closing member of FIG. 3; FIG.
FIG. 8 is a view of a first controller of a fume hood system capable of cleaning harmful gas according to the present invention. FIG.
FIG. 9 is a graph illustrating the surface wind speed controlled according to whether or not the human body is sensed in FIG.
10 is a view of a second controller of a fume hood system capable of cleaning harmful gas according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a harmful gas cleanable surface wind speed control fume hood system (hereinafter, simply referred to as a 'fume hood system') according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1, the fume hood system 1 according to the present invention includes a main body 100, a dust collector 200, and a controller 300. The main body 100, the dust collector 200,

More specifically, as shown in FIGS. 1 and 2, the main body 100 may be configured such that the experimenter tests the reaction experiment of the chemical agent or the like in the laboratory space 111, The hood main body 110 and the exhaust fan 120 are configured to allow the harmful gas generated in the main body 111 to be exhausted to the dust collecting unit 200 described later.

For example, the hood main body 110 is formed as a generally hollow housing, and an opening portion 113 communicating with the laboratory space portion 111 is formed on the front surface of the hood main body 110. The opening portion 113 is formed with a hood body 110, The test space 111 can be opened and closed through a door 115 installed as much as possible.

An exhaust pipe 210 constituting a dust collecting unit 200 is connected to one end of the hood main body 110 at one end thereof in communication with the test space 111. The other end of the exhaust pipe 210 is connected to a filter member 220 And the harmful gas generated in the experimental space part 111 is supplied into the filter member 220 through the exhaust pipe 210 to be purified.

In addition, although not shown, the hood main body 110 can be fastened to the bracket member 240, which will be described later, by fastening means such as a bolt, a screw, or the like so as to be detachable from each other.

For example, the exhaust fan 120 is installed in the exhaust pipe 210 as close as possible to the hood main body 110, and the operation is controlled by the wind speed control unit 315, which is a constitution of the first controller 310, When the hood 120 is installed as close as possible to the hood main body 110, the opening area of the opening and closing member 230, which will be described later, increases when the exhaust pipe 210 is closed.

At this time, a damper 121 having a plate shape and controlled by the wind speed control unit 315 constituting the first controller 310 is provided in front of the exhaust fan 120, and the augmentation wind speed is controlled through the wind speed control unit 315 Although not shown, the damper 121 may be controlled by a motor (not shown) or the like so that the amount of opening / closing of the damper 121 can be adjusted by rotating the damper 121 inside the exhaust pipe 210.

3, the dust collector 200 is controlled by the second controller 320 to purify noxious gas forced into the exhaust pipe 210 through the exhaust fan 120, The exhaust pipe 120 is kept in an ON state continuously without being turned off even when the filter 226 used in the exhaust pipe 210 is replaced, A filter member 220, a bracket member 240, and an opening and closing member 230.

For example, the exhaust pipe 210 is connected to the exhaust pipe 210 so as to have a predetermined length by a fastening means so as to have a cylindrical pipe shape with both ends thereof opened at both ends thereof. It can be used by bending.

One end of the exhaust pipe 210 is connected to the upper part of the hood main body 110 so as to communicate with the experimental space 111 and the other end is connected to the filter member 220, So that the filter member 220 can be easily supplied.

At this time, an exhaust fan 120 and a damper 121 are provided in one end of the exhaust pipe 210 in the vicinity of the hood main body 110 to forcibly suck noxious gas in the experimental space part 111, An opening and closing member 230 to be described later can be opened and closed inside the exhaust pipe 210 so as to control the augmentation wind speed by the control unit 315 and close to the other end, Closing member 230 to close the path between the exhaust pipe 210 and the filter member 220 at the time of replacing the filter 226 constituting the exhaust pipe 220, It is preferable that a certain amount of noxious gas sucked in between the exhaust fan 120 and the opening and closing member 230 is collected in the exhaust pipe 210 so that the noxious gas can be retained.

4 to 7, the filter member 220 is connected to the other end of the exhaust pipe 210, forcibly sucks the harmful gas introduced through the exhaust pipe 210, and purifies the filter member 220, A filter 226, and a suction motor 228 in order to discharge the purified air to the outside.

Here, the housing 221 is formed in a tubular shape having both sides opened, and both sides of the opening are closed by a pair of opening and closing doors 222 including a first opening and closing door 223 and a second opening and closing door 224, It is installed so as to maintain confidentiality.

The first opening and closing door 223 detachably coupled to the housing 221 is connected to the exhaust pipe 210 so that noxious gas can be introduced into the housing 221. The first opening and closing door 223, The second opening and closing door 224 detachably coupled to the housing 221 symmetrically with respect to the housing 221 is connected to the external duct 225 to allow the purified air to be discharged to the outside of the housing 221 .

At this time, when the filter 226 provided in the housing 221 is replaced, only the second opening / closing door 224 is opened so that the noxious gas can easily stay in the exhaust pipe 210, .

The outer duct 225 is formed to have a bellows shape so that the outer duct 225 and the second opening and closing door 224 are separated from each other after the second opening and closing door 224 and the housing 221 are separated from each other So that the filter 226 can be replaced.

The filter 226 is hollow and has a hollow portion 226a formed therein. The filter 226 is detachably inserted into the housing 221.

At this time, the outer surface of the filter 226 is separated from the inner surface of the housing 221 by a predetermined distance, and the harmful gas introduced through the exhaust pipe 210 is entirely spread to the filter 226 through the suction motor 228 to be filtered The air 227 is moved through the moving path 227 and the air purified by the filter 226 flows into the hollow portion of the filter 226 And may be discharged to the outside of the housing 221 by the external duct 225 through the second opening / closing door 224 by the suction force of the suction motor 228.

The one side of the filter 226 adjacent to the first opening and closing door 223 is easily spread to the outer surface of the filter 226 having a cylindrical shape and the flow of the noxious gas introduced through the first opening and closing door 223 is reduced, Closing door 224 through the hollow portion 226a of the filter 226. The other side of the filter 226 is connected to the hollow portion 226a, So that the purified noxious gas can be discharged to the external duct 225 through the second opening and closing door 224. [

The suction motor 228 is disposed inside the housing 221 in the vicinity of the second opening and closing door 224 and moves the exhaust pipe 210 by the suction force of the rotating impeller of the exhaust fan 120, 223 are quickly sucked into the housing 221 to be cleaned by the filter 226.

The suction motor 228 is controlled by the second controller 320 so that the second opening and closing door 224 and the housing 221 can be automatically turned off when the second opening and closing door 224 is opened. So that the suction motor 228 can be automatically turned on and off by the pressure sensor 229 which is switched by the pressure of the second opening / closing door 224. [

At this time, the pressure sensor 229 is controlled by the second controller 320, and when the pressure sensor 229 is operated (the second opening / closing door is opened), the second controller 320 automatically opens / So that the member 230 can be operated.

The reason why the suction motor 228 is provided is that the harmful gas moving through the exhaust pipe 210 is sucked as quickly as possible so that the exhaust pipe 210 is closed after the inside of the exhaust pipe 210 is closed by the opening and closing member 230, So that noxious gas can be retained for a relatively long period of time.

The opening and closing member 230 and the opening and closing member 233 and the nozzle 233 are configured to allow the harmful gas to be continuously sucked through the exhaust fan 120 even when the filter 226 is replaced. 234).

The cylinder 231 is fixed to the bracket member 240 so that the outer surface of the cylinder 231 can be controlled by the second controller 320 and the rod 232 ascends and descends in the vertical direction, The plate 233 is installed to open and close the inside of the exhaust pipe 210.

At this time, it is preferable to determine whether the cylinder 231 is operated by the pressure sensor 229 or not.

That is, when the second opening / closing door 224 is opened and the pressure sensor 229 is released to replace the filter 226 and the released information is transmitted to the second controller 320, It is determined that the filter 226 is to be replaced and the rod 232 of the cylinder 231 is quickly lowered so that the inside of the exhaust pipe 210 is blocked by the opening and closing plate 233 to introduce the noxious gas into the housing 221 And it is possible to keep the noxious gas in the length D from the exhaust fan 120 to the opening and closing plate 233 (see FIG. 3).

At this time, the rod 231 can lift / lower the rod 232 by air pressure or oil pressure, and the second controller 320 does not directly connect the cylinder 231, 235 to control the cylinder 231.

In addition, the pump 235 uses a pump 235 which discharges atmospheric pressure to a predetermined pressure rather than the hydraulic pressure so as to be usable in parallel with the nozzle 234 in addition to the cylinder 231 described above.

The upper portion of the opening / closing plate 233 is engaged with the lower portion of the rod 232 to open / close the inside of the exhaust pipe 210 as the rod 232 moves up and down.

At this time, a ring-shaped hermetic body 211 is formed on the inner wall of the exhaust pipe 210 into which the opening / closing plate 233 is inserted, so that the opening / closing plate 233 is introduced to smoothly block the harmful gas, An insertion groove 212 is formed in the outer surface of the hermetic body 211 to fit into the outer surface of the opening and closing plate 233 in a fitting manner so that the opening and closing plate 233 closes the inside of the exhaust pipe 210, It is preferable to block the inflow into the housing 221.

The airtight body 211 is made of a resilient material such as rubber or a synthetic resin material.

The nozzle 234 is installed on the outer surface of the exhaust pipe 210 so as to face the housing 221 and is inserted through the exhaust pipe 210 to discharge the exhaust pressure.

The nozzle 234 is controlled by the second controller 320 and operates when the opening and closing plate 233 is opened again after shutting off the exhaust pipe 210 to remove the noxious gas staying inside the exhaust pipe 210 So that it can be quickly introduced into the housing 221 with the help of the suction motor 228.

For example, the bracket member 240 is formed so that a plurality of vertical and horizontal frames are connected to each other by a fastening means to have a rectangular parallelepiped frame shape, a housing 221 is provided therein, and a second controller A cylinder 231, a cylinder 231, and a pump 235 for providing air pressure to the nozzle may be fixedly installed.

A plurality of rollers 241 can be rotatably installed on the bracket member 240 so as to easily pull the housing 221 out of the bracket member 240. The roller 241 and the housing 221 are rotatable, A moving plate 242 having a plate shape is further provided between the lower part of the housing 221 to facilitate the drawing of the housing 221.

8 to 11, the controller 300 is configured to measure the surface wind speed of the inside of the hood main body 110 and to set the augmented wind speed according to the measured value, The first controller 310 including the first controller 311, the human body sensing unit 312, the reference wind speed setting unit 313, the augmented wind speed setting unit 314 and the wind speed control unit 315, And a second controller 320 for continuously exhausting the noxious gas without the exhaust pipe 210 being turned off when the exhaust pipe 210 is separated from the main body 100.

The wind speed sensing unit 311 is installed in the hood main body 110 or the opening 113 adjacent to the door 115 to measure the surface wind speed of the opening 113 according to the degree of opening of the door 115 , And provides the measured surface wind speed to the wind speed control unit 315.

The human body sensing unit 312 is disposed on the front surface of the hood main body 110, that is, directly below the center of the door 115. The human body sensing unit 312 senses a human body (senses a temperature or the like) And provides it to the control unit 315.

The reference wind speed setting unit 313 is configured to set the reference wind speed Vref.

Here, the reference wind speed corresponds to the surface wind speed of the comparative compensation for basically controlling the surface wind speed inside the hood main body 110 when there is no experimenter (the human sensing part does not detect it).

In addition, the experimenter can change and store the reference wind speed through the reference wind speed setting unit 313.

The augmentation wind speed setting unit 314 is a configuration in which the augmented wind speed Vup is set / stored.

Here, the augmented wind speed is a surface wind speed of a comparison object for controlling the surface wind speed inside the hood main body 110 when the experimenter is present.

If the reference wind speed is set to 0.5 m / sec, for example, the increase wind speed is set to a relatively larger value than the reference wind speed, such as 0.6 to 0.7 m / sec. Can be set.

The experimenter can change and store the increase wind speed through the wind speed setting unit 314.

The wind speed control unit 315 controls the operation of the exhaust fan 120 and the damper 121 according to the signals provided from the wind speed sensing unit 311 and the human body sensing unit 312 so that the surface wind speed inside the hood main body 110 So that the set wind speed can be maintained.

The wind speed control unit 315 may have a feature of controlling the surface wind speed inside the hood main body 110 differently according to the detection result of the human body sensing unit 312.

That is, as shown in the figure, when the human body (experimenter) is sensed by the human sensing unit 312, the wind speed control unit 315 compares the surface wind speed measured by the wind speed sensing unit 311 with the predetermined increase wind speed, And the damper 121 to control the surface wind speed so that the surface wind speed of the test space 111 inside the hood main body 110 is increased to a set increase wind speed.

On the other hand, if no human body is sensed by the human body sensing unit 312, the wind speed controller 315 compares the surface wind speed measured by the wind speed sensing unit 311 with the predetermined reference wind speed, Thereby controlling the surface wind speed so that the surface wind speed inside the hood main body 110 is maintained at the set reference wind speed.

In this way, the wind speed control unit 315 controls the surface wind speed in accordance with the presence or absence of the experimenter to enhance the protection of the experimenter, while minimizing unnecessary energy loss.

For example, assuming that the reference wind speed is set to 0.5 m / sec and the wind speed increase is set to 0.6 m / sec, the wind speed control unit 315 controls the wind speed, The ventilator 100 is controlled so that the surface wind speed inside the hood main body 110 is maintained at 0.6 m / sec, which is the increasing wind speed, to enhance the protection of the experimenter, 110 so that the surface wind speed inside the hood main body 110 is maintained at the reference wind speed of 0.5 m / sec, unnecessary energy loss is prevented and exhausting is performed.

Meanwhile, the fume hood system 1 of the present invention is characterized in that the wind speed is controlled to be a reference wind speed when there is no experimenter and to be increased to an augmented wind speed when there is an experimenter, In the case where the experiment is performed in the main body 110, the surface wind speed is controlled by the increased wind speed for a long period of time, thereby increasing the amount of energy loss.

In order to solve this problem, as shown in the figure, a time check unit 316 and a time setting unit 317 may be further included.

The time check unit 316 checks the time when the human body is sensed by the human body sensing unit 312 as a start point.

The time setting unit 317 is configured to set / store the release time for releasing the control to increase wind speed, and the experimenter can appropriately set / store the release time through the time setting unit 317 according to the experimental environment or the like .

That is, in the embodiment where the time check unit 316 and the time setting unit 317 are configured, the wind speed control unit 315 controls the surface wind speed to the set reference wind speed or the increase wind speed according to the presence or absence of human body detection , And when the check time of the time check unit 316 reaches the release time set in the time setting unit 317, the surface wind speed is controlled to be reduced to the reference wind speed in the increased wind speed.

For example, assuming that the reference wind speed is set at 0.5 m / sec, the augmented wind speed is set at 0.6 m / sec, and the release time is set at 5 minutes, when the experimenter is left out, m / sec, and controls the surface wind speed to be maintained at 0.6 m / sec, which is the increased wind speed, when the experimenter is returned to conduct experiments.

At this time, the time checking unit 316 checks the time from the time when the human body sensing unit 312 senses the human body, and when the time checked in the time check unit 316 during controlling the surface wind speed to the increased wind speed is set When the time reaches 5 minutes, the wind speed control unit 315 controls the surface wind speed of the hood main body 110 to maintain the set reference wind speed again.

Thus, by controlling the surface wind speed with the increasing wind speed for the initial period of time while the experimenter approaches the hood main body 110, it is possible to strengthen the protection of the experimenter and to control the surface wind speed to the reference wind speed again after a certain time, The increase in energy loss can be minimized.

Although the fume hood system 1 of the present invention having the above-described configuration is not illustrated, it is also possible to calculate wind speed data such as the reference wind speed, the wind speed increase rate, the current surface wind speed measured by the wind speed sensing unit 311, The first controller 310 may be installed on the outer surface of the hood main body 110 so that the experimenter can easily control the surface wind speed and use it do.

For example, the second controller 320 includes a cleaning sensor 321 and an operation setting unit 322, which are installed in the bracket member 240 described above.

Here, the purifying sensor 321 is provided on the outer surface of the outer duct 225 to measure the purified air moving inside the outer duct 225, for measuring the purifying value of the air purified by the filter 226 .

The measured value measured by the purge sensor 321 is provided to the second controller 320 so that it is possible to determine whether to replace the filter 226 according to the result of the measured value.

For example, when the degree of contamination of the measurement value measured through the purification sensor 321 is less than or equal to a predetermined reference value set in advance by the second controller 320, an empirical method using an alarm, So that the user can recognize the necessity of replacing the filter 226. If the measured value is greater than the reference value, the user can confirm that the filter 226 is cleaned smoothly.

The operation setting unit 322 is electrically connected to the pressurizing sensor 229 as well as the above-described purifying sensor 321. The operation setting unit 322 compares the measured value measured by the purifying sensor 321 with a reference value preset therein So that the experimenter can recognize whether or not the filter 226 is replaced or not. It is also possible to display the results of the pressure and the termination of the pressure sensor 229, And the like.

The fume hood system 1 according to the present invention constructed as described above is different from the conventional art in that the surface wind speed of the hood main body 110 is changed from the reference wind speed to the increase wind speed So that it is possible to efficiently exhaust the fume hood so that unnecessary energy loss can be minimized while allowing the experimenter to be safely supported.

Also, a dust collecting unit 200 having a filter member 220 capable of purifying noxious gas is provided at one side of the hood main body 110 to discriminate the noxious gas from the conventional one, and the filter 226 is replaced The filter 226 can be replaced while keeping a certain amount of noxious gas in the exhaust pipe 210 for a predetermined time through the opening and closing member 230 so that the filter 226 can be safely replaced without any leakage of the noxious gas The effect can be used.

The specific embodiments of the present invention have been described above. It is to be understood, however, that the spirit and scope of the invention are not limited to these specific embodiments, but that various changes and modifications may be made without departing from the spirit of the invention, If you are a person, you will understand.

Therefore, it should be understood that the above-described embodiments are provided so that those skilled in the art can fully understand the scope of the present invention. Therefore, it should be understood that the embodiments are to be considered in all respects as illustrative and not restrictive, The invention is only defined by the scope of the claims.

1: The harmful gas cleanable surface wind speed control fume hood system according to the present invention
100:
110: Hood main body
120: Exhaust fan
200: dust collecting part
210: Exhaust pipe
220: Filter element
230:
240: Bracket member
300:
310: first controller
320: Second controller

Claims (2)

In a fume hood for discharging harmful gas generated in an experimental space,
The experimental space part 111 communicating with the opening part 113 formed in the front part is formed in the inside of the experimental space part 111 A main body 100 for opening / closing the main body 100;
A dust collecting part 200 connected to the main body part 100 to communicate with the experimental space part 111 and forcedly sucking the harmful gas generated in the experimental space part 111 and purifying and discharging the harmful gas; And
And a control unit 300 for controlling the main body 100 and the dust collecting unit 200,
The dust collecting part 200 includes an exhaust pipe 210 having a predetermined length and one end connected to the body part 100 so as to communicate with the test space part 111. The dust collecting part 200 is connected to the other end of the exhaust pipe 210, The filter member 220 is detachably coupled to the outer surface of the main body 100, and the filter member 220 can be moved in and out of the main body 100 The bracket member 240 is installed on the bracket member 240 so that the inside of the exhaust pipe 210 can be opened and closed while the exhaust pipe 210 and the filter member 220 are separated from each other. And an opening / closing member (230) provided to allow the noxious gas sucked by the exhaust pipe (210) to stay in the exhaust pipe (210) for a predetermined time,
The control unit 300 includes an air speed sensing unit 311 provided inside the main body 100 for controlling the surface wind speed, a human sensing unit 312 installed on the front surface of the main body 100 for sensing a human body, A reference wind speed setting unit 313 for setting the reference wind speed Vref of the main body 100, an augmentation wind speed setting unit 314 for setting and storing an augmentation wind speed Vup having a wind speed relatively higher than the reference wind speed, And a wind speed control unit 315 for controlling a reference wind speed or an augmentation wind speed according to a detection result of the human body sensing unit 312. The first controller 310 installed in the main body 100,
A purifying sensor 321 installed on the bracket member 240 for measuring the degree of contamination of the purified noxious gas and a controller for comparing the measured value provided by the purifying sensor 321 to determine whether the filter member 220 is to be replaced And a second controller (320) installed on the bracket member (240), the second controller (320) including an operation setting unit (322)
The opening / closing member 230
A cylinder 231 fixed to the bracket member 240 and capable of lifting and lowering the rod 232 by a pressure or an oil pressure provided from the filter member 220;
And the upper portion is fixedly coupled to the lower portion of the rod 232. The rod 232 is opened and closed by opening and closing the inside of the exhaust pipe 210 to block the noxious gas moving to the filter member 220 An opening / closing plate 233 for allowing the noxious gas to stay in the exhaust pipe 210 for a predetermined time after the shutoff is performed; And
The exhaust pipe 210 is installed on the outer surface of the exhaust pipe 210 so as to communicate with the inside of the exhaust pipe 210 while looking at the filter member 220. After the opening and closing plate 233 is lifted, And a nozzle (234) provided so that the noxious gas staying in the filter member (220) can be easily sucked in the direction of the filter member (220).
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