KR20230055641A - High-clean biosafety workbench that can minimize pollution - Google Patents

Abstract

The present invention relates to a high-clean biosafety workbench that can minimize pollution and, in particular to a high-clean biosafety workbench that comprises: a work chamber having an experimental space for a test object formed inside and a door installed on the front side, which can be opened and closed; a blowing chamber having a blower disposed therein, which sucks in the air inside the experimental space and then supplies the same back into the experimental space to generate a circulating airflow; a filter filtering the circulating airflow when the circulating airflow generated by the blower is supplied to the experimental space; a partition wall having a plurality of perforated holes formed and dividing the work chamber and the blowing chamber while supporting the filter from below; and a straight guiding member installed on the lower side of the partition wall to guide the circulating airflow passing through the filter and the perforated hole in the partition wall to fall vertically into the experimental space, wherein the circulating airflow is allowed to be supplied downwards into the experimental space in a straight line, thereby preventing cross-contamination between samples within the experimental space.

Description

High-clean biosafety workbench that can minimize pollution}

The present invention relates to a biological safety cabinet including a blower that generates a circulating air flow by sucking in and discharging air inside an experimental space maintained in an aseptic state, and in particular, air is supplied downward into the experimental space in a straight state, It relates to a high-clean biological safety cabinet capable of minimizing the degree of contamination that can prevent cross-contamination between internal samples.

The Biological Safety Cabinet is basic experimental equipment used in research fields such as bio and medicine, and is used to protect researchers from samples such as microorganisms or viruses while protecting samples from external polluted air.

Such a biological safety cabinet has a working chamber providing an experimental space for researchers to conduct experiments, a transparent door that opens and closes in the vertical direction on the front of the working chamber, and a bottom surface of the working chamber to display the inside of the experimental space. Equipped with a suction grill for sucking in air.

In addition, a blowing chamber is provided with a blower installed to generate a circulating air flow by sucking in and discharging air from the experimental space, and is installed on the boundary line between the working chamber and the blowing chamber to filter the air introduced into the experimental space of the working chamber. It is equipped with a filter that

However, a blower used in a conventional biosafety cabinet generates turbulent flow in the blowing chamber due to non-uniform velocity and pressure as air is discharged from an outlet having a short length and a large area. The flow of such turbulence is non-uniformly scattered as it flows back into the test space, causing cross-contamination of a plurality of samples provided inside the test space.

Registered Patent No. 10-2218480

The present invention has been made to solve the above problems of the prior art, by installing a straight guide member on the lower side of the filter so that the circulating airflow supplied to the test space is supplied downward in a straight state, thereby cross-contaminating the samples inside the test space. The purpose is to provide a high-clean biological safety cabinet that can prevent this from occurring.

A high-clean biological safety cabinet capable of minimizing contamination according to the present invention for solving the above problems includes a work chamber in which an experiment space for a test object is formed and a front door is installed to be able to be opened and closed; a blower chamber provided therein with a blower that sucks in air from the inside of the experiment space and supplies it back to the inside of the experiment space to generate a circulating air current; a filter for filtering the circulating air current generated by the blower when it is supplied to the experiment space; a partition wall having a plurality of perforated holes, partitioning the work chamber and the blowing chamber and supporting the filter from below; It is configured to include; a straight guide member installed on the lower side of the partition wall to induce the circulating airflow passing through the perforated holes of the filter and the partition wall to fall vertically into the experiment space.

Here, the straight guide member is formed in the shape of a honeycomb structure by connecting a plurality of wall side ends.

In addition, a duct is installed at the outlet of the blower; The duct is formed in a structure in which a nozzle whose diameter gradually decreases as it moves away from the blower outlet, and a diffuser whose diameter gradually increases as it moves away from the nozzle and is connected to the smallest part of the nozzle are connected. do.

Here, a UV lamp for irradiating ultraviolet rays to the blower, the duct, and the filter is installed in the blowing chamber.

Further, a door detection sensor for detecting opening and closing of the door is installed at the bottom of the work chamber, and the UV lamp is operated when the door is closed and the experiment space is sealed.

In addition, a hazardous material detection sensor for detecting bacteria or viruses leaking from the experimental space is installed at the entrance of the working chamber, and a visual signal is provided when the hazardous material detection sensor detects bacteria or viruses in the working chamber or the blowing chamber. Alternatively, an alarm outputting an audible signal is provided.

Here, the hazardous material detection sensor is an electrostatic sensor or an optical sensor.

In addition, an armrest is installed at the entrance of the experiment space, and the hazardous material detection sensor is installed on the lower surface of the armrest.

The high-clean biological safety cabinet capable of minimizing the contamination degree of the present invention configured as described above prevents cross-contamination between samples placed inside the test space as the circulating air flows downward and straight in the test space while passing through the straight guide member. There are benefits to avoiding it.

In addition, since the air discharged from the blower is discharged to the outside through the duct in which the nozzle and the diffuser are connected, the discharged air is discharged at a constant pressure and has a flow with a uniform speed and pressure, thereby suppressing the occurrence of turbulence. There is an advantage of improving energy efficiency by increasing the flow rate as well as preventing contamination of the flow rate.

In addition, there is an advantage in that bacteria or viruses attached to the inner wall surface of blowers, ducts, filters, and blowing chambers can be removed by ultraviolet rays irradiated from a UV lamp.

In addition, when the door sensor detects the sealing of the door, the UV lamp is automatically turned on without a separate operation by the researcher (experimenter), so there is an advantage of high convenience.

In addition, when the dangerous substance detection sensor detects bacteria or viruses leaking from the experimental space, the alarm outputs visual and auditory signals to inform the researchers conducting the experiment, helping them to take prompt follow-up measures. there is

1 is a perspective view showing a high-clean biological safety cabinet capable of minimizing the degree of contamination according to the present invention.
2 is a view of the interior of the biological safety cabinet shown in FIG. 1 viewed from one direction;
FIG. 3 is a view showing a filter, a bulkhead, and a straight guide member of the biological safety cabinet shown in FIG. 2;
4 is a view of the interior of the biological safety cabinet shown in FIG. 1 as seen from another direction;

Hereinafter, an embodiment of a high-clean biological safety cabinet capable of minimizing the degree of contamination according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing a high-clean biological safety cabinet capable of minimizing contamination according to the present invention, FIG. 2 is a view of the inside of the biological safety cabinet shown in FIG. 1 viewed from one direction, and FIG. 3 is FIG. 2 It is a diagram showing the filter, bulkhead and straight guide member of the biosafety cabinet shown in .

And, FIG. 4 is a view of the inside of the biological safety cabinet shown in FIG. 1 viewed from another direction.

A high-clean biological safety cabinet capable of minimizing the degree of contamination according to the present invention is to prevent cross-contamination of samples (test objects) inside the experiment space (10a), and includes a work chamber (10) and the work chamber (10). ), a blowing chamber 20 provided on the upper side, a filter 30 filtering the circulating air flowing from the working chamber 10 to the blowing chamber 20, and a partition wall installed below the filter 30 (40) and a straight guide member (50) installed below the partition wall (40).

The work chamber 10 forms an experiment space 10a for a sample inside, and the experiment space 10a is opened and closed by a door 11 installed to be openable and openable at the front. The working chamber 10 is provided with a suction grill 16 on the inner bottom surface to suck air in the experiment space 10a and suck in air from the outside so that the airflow inside the experiment space 10a does not escape to the outside. prevent it

The experimental space 10a is provided in the working chamber 10 and is a space in which a researcher sitting in front of the working chamber 10 puts his or her hands in and performs various experiments on an experimental object.

The door 11 slides up and down from the front of the work chamber 10 to open and close the experiment space 10a within the work chamber 10 .

A hazardous material detection sensor 14 is installed at the entrance of the working chamber 10 configured as described above. More precisely, an armrest 13 for supporting an experimenter's arm is installed at the entrance of the experiment space 10a provided in the work chamber 10, and a hazardous material detection sensor 14 is installed on the bottom of the armrest 13. ) is installed.

The dangerous substance detection sensor 14 detects bacteria or viruses leaking from the experimental space 10a and is composed of an electrostatic sensor or an optical sensor. When the dangerous substance detection sensor 14 detects that the dangerous substance leaks out of the experiment space 10a, the experimenter must be notified of this fact.

To this end, in the present invention, an alarm 15 that outputs a visual signal or an audible signal when the hazardous material detection sensor 14 detects bacteria or viruses is installed in the working chamber 10 or the blowing chamber 20.

Therefore, when the hazardous substance detection sensor 14 detects a dangerous substance such as bacteria or a virus, the alarm 15 composed of a lamp and a buzzer displays a warning signal to the outside, so that the lamp flashes or a strong sound is generated from the buzzer. The experimenter can quickly recognize that it is a dangerous situation.

The blowing chamber 20 has a function of sucking air inside the experimental space 10a of the working chamber 10 and then supplying the air to the inside of the experimental space 10a to generate a circulating air flow and discharge the contaminated air to the outside. do

In the blowing chamber 20, a blower 21 generating a circulating air flow is installed therein, and an exhaust port 22 for discharging air is provided on the upper surface.

The blower 21 is provided with a blowing fan (not shown) and a motor (not shown) rotating the blowing fan, so that when the blowing fan rotates, the air in the experimental space 10a is sucked in through the discharge port. It is discharged into the internal space of the blowing chamber 20 .

At this time, a duct 23 is installed parallel to the filter 30 at the discharge port of the blower 21 .

The duct 23 is composed of a nozzle 23a and a diffuser 23b integrally connected to the nozzle 23a.

The diameter of the nozzle 23a gradually decreases as it moves away from the outlet of the blower 21, and the diffuser 23b is integrally connected to the part having the smallest diameter of the nozzle 23a and moves away from the nozzle 23a. The diameter gets bigger and bigger.

Air discharged from the outlet of the blower 21 by the duct 23 has a uniform flow while suppressing generation of turbulence in the space above the filter 30 .

The filter 30 filters the circulating air flow generated by the blower 21 when it is supplied to the experiment space 10a.

That is, the filter 30 is installed at the boundary line between the working chamber 10 and the blowing chamber 20 to filter air when supplying air to the experimental space 10a. After the air inside the experimental space 10a and outside air are sucked in by the operation of the blower 21, about 30% of the air sucked in is discharged to the outside of the laboratory through the exhaust port 22, and about 70% of the air is It is supplied back to the inside of the experimental space 10a, and after purifying 70% of the air with the filter 30, it is supplied to the experimental space 10a.

Meanwhile, a UV lamp 24 may be installed inside the blowing chamber 20 . The UV lamp 24 irradiates ultraviolet rays to the inner wall surface of the blowing chamber 20, the blower 21, the duct 23, and the filter 30 to remove viruses and the like attached thereto.

Looking more closely, if the bacteria or virus removal operation by the UV lamp 24 is performed during the experiment, it may affect the sample, so after the experiment in the biological safety cabinet is finished, the UV lamp 24 is turned on to It is desirable to remove

Therefore, when the door 11 is closed by installing the door sensor 12 to detect the opening and closing of the door 11 on the bottom of the work chamber 10, the experiment space 10a is sealed, and the UV lamp for a certain period of time from this time. (24) is automatically turned on to irradiate ultraviolet rays.

In other words, when the door 11 comes down after the experiment is finished and the door sensor 12 detects that the experiment space 10a is closed, the UV lamp 24 turns on and emits ultraviolet rays to the blowing chamber 20. The inner wall surface, the blower 21, the duct 23 and the filter 30 are irradiated. Harmful bacteria and viruses such as Escherichia coli, Staphylococcus aureus, and Staphylococcus epidermidis are sterilized by such ultraviolet irradiation.

In addition, since the turn-on time and turn-off time of the UV lamp 24 can be set by the experimenter, the experimenter can arbitrarily select the sterilization time according to the use environment.

The partition wall 40 partitions the working chamber 10 and the blowing chamber 20, and is installed below the filter 30 to support the filter 30 from below.

A plurality of perforated holes 40a penetrating in the vertical direction are formed in the partition wall 40 . Therefore, the circulating airflow passing through the filter 30 is guided to the straight guide member 50 through the perforated hole 40a.

The straight guide member 50 is installed on the lower side of the partition wall 40 to induce the filter 30 and the circulating airflow passing through the perforated hole 40a of the partition wall 40 to fall vertically into the experiment space 10a.

The straight guide member 50 is formed in the shape of a honeycomb structure by connecting a plurality of wall side ends, and has an air flow path 50a communicating with the perforated hole 40a in the vertical direction. Therefore, the circulating airflow guided to the air passage 50a through the perforated hole 40a passes through the air passage 50a having a certain length, improves straightness, and falls vertically toward the sample from the upper side of the experiment space 10a.

10: work chamber 11: door
12: door detection sensor 13: armrest
14: hazardous material detection sensor 15: alarm
20: blowing chamber 21: blower
22: exhaust port 23: duct
23a: nozzle 23b: diffuser
24: UV lamp 30: filter
40: bulkhead 40a: perforated hole
50: straight guide member 50a: air passage

Claims (8)

A work chamber 10 in which an experiment space 10a for a test object is formed therein and a door 11 is installed to be openable and open on the front side;
a blower chamber 20 provided therein with a blower 21 that sucks in the air inside the experiment space 10a and then supplies the air to the inside of the experiment space 10a to generate a circulating air current;
a filter 30 for filtering the circulating air flow generated by the blower 21 when it is supplied to the experiment space 10a;
a bulkhead 40 having a plurality of perforated holes 40a formed therein, partitioning the working chamber 10 and the blowing chamber 20 and supporting the filter 30 from below;
A straight guide member 50 installed below the partition wall 40 to induce the circulating airflow passing through the filter 30 and the perforated hole 40a of the partition wall 40 to fall vertically into the experiment space 10a; A high-clean biological safety cabinet capable of minimizing the degree of contamination, characterized in that configured to include.
The method of claim 1,
The straight guide member 50 is a high-clean biological safety cabinet capable of minimizing contamination, characterized in that it is formed in the form of a honeycomb structure by connecting a plurality of wall side ends.
The method of claim 1,
A duct 23 is installed at the outlet of the blower 21,
The duct 23 is connected to a nozzle 23a whose diameter gradually decreases as it moves away from the discharge port of the blower 21, and is connected to a part having the smallest diameter of the nozzle 23a, and the duct 23 is connected to the nozzle 23a. A high-clean biological safety cabinet capable of minimizing contamination, characterized in that it is formed in a structure in which a diffuser (23b) with a gradually increasing diameter is formed.
The method of claim 3,
A high-clean biological safety cabinet capable of minimizing contamination, characterized in that a UV lamp 24 for irradiating ultraviolet rays to the blower 21, the duct 23, and the filter 30 is installed in the blowing chamber 20. .
The method of claim 4,
A door detection sensor 12 for detecting opening and closing of the door 11 is installed at the bottom of the work chamber 10, and when the door 11 is closed and the experiment space 10a is sealed, the UV lamp A high-clean biological safety cabinet capable of minimizing the degree of contamination, characterized in that (24) is operated.
The method of claim 1,
A dangerous substance detection sensor 14 for detecting bacteria or viruses leaking from the experimental space 10a is installed at the entrance of the working chamber 10,
The work chamber 10 or the blowing chamber 20 is provided with an alarm 15 that outputs a visual signal or an audible signal when the hazardous material detection sensor 14 detects bacteria or viruses. A high-clean biological safety cabinet that can minimize
The method of claim 6,
The hazardous material detection sensor 14 is a high-clean biological safety cabinet capable of minimizing the degree of contamination, characterized in that the electrostatic sensor or an optical sensor.
The method of claim 6,
An armrest 13 is installed at the entrance of the experiment space 10a, and the hazardous material detection sensor 14 is installed on the lower surface of the armrest 13. Clean biosafety cabinet.

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