JP5547558B2 - Equipment for removing pollutants - Google Patents

Description

The present invention relates to equipment you remove contaminants, particularly fume, biohazard countermeasure Class II cabinet (safety cabinet), including a chemical hazard protection cabinets, HEPA filter (air cleaning means) to remove contaminants Relates to a device equipped with

  In the draft chamber, biohazard class II cabinet, and chemical hazard control cabinet, work is performed to handle air sucked from the work opening at the bottom of the front shutter and pollutants in order to isolate the work space of the equipment and the air outside the equipment. Air in the space is filtered with a HEPA filter, and only air is exhausted. In such an apparatus, since the HEPA filter filters contaminants and dust, it is gradually clogged and needs to be replaced. When replacing the HEPA filter that has captured the contaminant, it is necessary to make the contaminant attached to the HEPA filter safe by disinfection and sterilization so that the contaminant does not affect the human body. However, if there is no effective disinfection / sterilization means for pollutants in the vicinity, the HEPA filter is enclosed in a plastic bag, sealed, and then taken out of the apparatus.

  Here, the cabinet of the method of taking out a HEPA filter by enclosing in a plastic bag by a prior art is shown in FIG. The HEPA filter is drawn out to the work space side of the cabinet while being surrounded by a plastic bag (further described later). In this way, the HEPA filter can be taken out without directly touching the contaminated HEPA filter, and the inspector is devised not to contaminate.

  In Patent Document 1, when replacing the HEPA filter using a bag without sterilization when replacing the HEPA filter, a safety cabinet such as a biohazard countermeasure cabinet that minimizes infection and a post-treatment method for replacing the air cleaning means Is disclosed. In the present invention, the air supply system supplies clean air to the work space through the air cleaning means by the air blowing means, and the air is discharged from the circulation passage connected to the work space to the outside of the apparatus by the exhaust means through the air cleaning means. In a safety cabinet that includes an exhaust system, a front shutter formed on the front surface of the work space, an outlet to the outside of the air cleaning means, and a cover that closes the outlet, a connection port that connects the exhaust system to the outside, and a connection port And a cap for closing.

  In Patent Document 2, there is a biohazard countermeasure glove box in which a HEPA filter and a sterilization immersion tank are configured in a work space, and a hazardous substance can be inactivated in the apparatus before the HEPA filter is taken out from the apparatus. It is disclosed. In this invention, in the biohazard countermeasure glove box, a HEPA filter is attached from the work space side, and a chemical immersion tank that can inactivate the material to be handled is provided in the work space, and the HEPA filter is attached to the glove box. The device is configured so that the test substance can be inactivated before removal from the container.

JP 2004-351283 A JP 2006-315106 A

  Here, in order to clarify the problem to be solved by the present invention, a chemical hazard countermeasure cabinet in which the HEPA filter is taken out while being surrounded by the above-described conventional plastic bag will be described with reference to FIGS. 11 and 12 again. In addition, the apparatus equipped with the HEPA filter which removes a pollutant demonstrates as an example the cabinet for a chemical hazard countermeasure as a specific Example.

  11 (a) and 11 (b), the airflow configuration of the chemical hazard countermeasure cabinet 1 is such that a work opening 6 is formed under the front shutter 4, air outside the apparatus is sucked from the work opening 6, and the inflow airflow 7 Form. The inflow air 7 enters the work space 3 and is sucked into the pre-filter 11, the contaminant 10 contained in the air is removed by the HEPA filter 12 arranged outside the work space 3, and sucked into the blower 5. It exhausts from the exhaust port 8 formed in 1a. The worker 21 inserts an arm into the work space 3 from the work opening 6 and handles experimental materials in the work space 3. The inflow airflow 7 formed in the work opening 6 prevents the contaminant 10 in the work space 3 from leaking out of the chemical hazard countermeasure cabinet 1.

  A pre-filter 11 is formed on the back surface of the work space 3, and a removable work chamber cover 13 for maintenance of the HEPA filter 12 is formed on the back surface of the work space 3. A plastic bag mounting flange 16 is formed in the place where the working chamber cover 13 is opened. The plastic bag mounting flange 16 is an opening, and is disposed at the boundary between the inside and outside of the main body case 1a.

  A plastic bag 15 is attached to the plastic bag attachment flange 16. The plastic bag 15 is usually folded and stored inside the back of the working room cover 13 and inside the plastic bag mounting flange 16. A HEPA filter 12 is attached behind the plastic bag 15. A packing 14 is attached to the work chamber cover 13 on the back of the work space 3 to partition the contaminated air side of the work space 3 and the clean air on the leeward side of the HEPA filter 12.

  Thus, since the plastic bag 15 and the plastic bag attachment flange 16 partition the working space 3 in which the contaminant 10 exists and the clean air blowing side of the HEPA filter 12, they must be attached so that there is no leakage.

Next, a method for removing the HEPA filter 12 is shown in FIG.
The HEPA filter 12 needs to be replaced because it is clogged by the contaminant 10 and dust adhering thereto. When pulling out the HEPA filter 12 for replacement, the operator removes the working chamber cover 13 from the inside of the work space 3, pulls out the plastic bag 15a stored inside the plastic bag mounting flange 16, and passes the HEPA filter through the plastic bag 15b. 12 is removed. The removed HEPA filter 12 is accommodated in the plastic bag 15 b, only the portion where the HEPA filter 12 is accommodated in the plastic bag 15 is cut by the cutting and welding machine 18, and the HEPA filter 12 is sealed in the plastic bag 15. Although a method for attaching the new HEPA filter 12 is omitted, the new HEPA filter 12 is accommodated in the new plastic bag 15, and the new HEPA filter 12 is also mounted over the new plastic bag 15.

  However, the conventional method for taking out the old HEPA filter 12 from the working space 3 side is that the outside of the plastic bag 15 to be taken out handles the contaminant 10 so that the worker can work from the working space 3 side. It is necessary to touch the working space 3 and the working chamber cover 13.

  The arrangement of the conventional plastic bag 15 and the plastic bag mounting flange 16 is such that when the plastic bag 15 is not sufficiently attached and the work chamber cover 13 is not sufficiently attached, the pollutant 10 in the work space 3 is HEPA. There is a possibility that the air is sucked into the blower 5 and exhausted outside the apparatus without passing through the filter 12.

An object of the present invention, contaminants and to provide a that equipment to remove the leak difficult contaminants to the outside of the apparatus (chemical hazard protection cabinets).

In addition, another object of the present invention is not to replace the HEPA filter (air cleaning means) to which contaminants that cannot be disinfected and sterilized are attached from the work space 3 side where the risk of contamination is high, It is to provide a possible contaminants you remove the equipment to be replaced by a general in the air with no worry of pollution (chemical hazard protection for the cabinet).

  In order to solve the above-described problems, the present invention is configured as follows. In other words, in the general air region adjacent to the work space, the HEPA filter and the HEPA filter replacement vinyl bag mounting flange are arranged at the lower part of the work table, and from the general air at the lower part of the work table, The filter can be exchanged.

  Further, as another configuration, in the vicinity of the general air space adjacent to the work space, a HEPA filter replacement vinyl bag mounting flange is disposed on the side surface of the work space, and from the general air on the side surface of the work space. The HEPA filter can be exchanged.

The apparatus for removing contaminants of the present invention includes a work space provided in the apparatus, an exhaust system for exhausting air from the work space to the outside of the apparatus by air blowing means, and a contaminant provided in a flow path of the exhaust system. A HEPA filter that removes water, a front shutter that is formed on the front surface of the work space, a work opening that is open to the work space below the front shutter, and a work table that is disposed below the work space. A device for removing pollutants,
The air blowing means is disposed above the work table and is located above.
An opening for removing the HEPA filter closed by a cover is formed in an apparatus outer wall near the work space, and a removable bag is attached to the opening closed by the cover. The inside and outside of the device is shielded by a possible bag,
For removal of the HEPA filter, remove accommodates the HEPA filter into the bag after removing the cover from the air side of the instrumentation置外,
The opening outside the apparatus of the HEPA filter, the removable bag, and the cover covering the bag portion are arranged on the operator side below the work table ,
The inside of the bag is configured as a clean air side of the HEPA filter, and the outside of the bag is configured as general air .

Furthermore, the apparatus for removing contaminants of the present invention forms an exhaust space adjacent to the lower vicinity of the working space, the opening outside the apparatus of the HEPA filter , the removable bag, and the bag portion. The cover for covering is arranged in the exhaust space.

Further equipment you remove contaminants present invention, the cover said opening of the device outside of the air cleaning means, which covers a removable the bag, and the bag portion is arranged on the side wall surface of the main body It is characterized by.

Furthermore, the apparatus for removing contaminants of the present invention is characterized in that a disinfecting drain tank is provided below the HEPA filter .

Further equipment you remove contaminants present invention is characterized by having a disinfectant drain tank during air cleaning means and a removable bag.

The configuration of the present invention, HEPA filter that processed the pollutants that disinfection and sterilization can not effectively twist (air cleaning means) was removed by housing the bag, when replacing enables work in general air, HEPA filters ( it can provide you remove contaminants which eliminated the anxiety contact with contaminants during air cleaning means) exchange equipment (Chemical hazard protection cabinets).

Further, another effect may be insufficient attachment of HEPA filters (air cleaning means) replacement bag to chance, contaminants in the working space, instrumentation remove contaminants leaking out of the apparatus (Chemical hazard countermeasure cabinet) can be provided.

It is the external view of the apparatus (Chemical hazard countermeasure cabinet) equipped with the HEPA filter which removes the pollutant which shows 1st Embodiment of this invention, and sectional drawing structural drawing. It is sectional structure drawing of the state which took out the HEPA filter of the apparatus (cabinet for chemical hazard countermeasures) equipped with the HEPA filter which removes the pollutant which shows 1st Embodiment of this invention. It is the external view of the apparatus (Chemical hazard countermeasure cabinet) equipped with the HEPA filter which removes the pollutant which shows 2nd Embodiment of this invention, and sectional drawing structural drawing. It is sectional structure drawing of the state which took out the HEPA filter of the apparatus (Cabinet for chemical hazard countermeasures) equipped with the HEPA filter which removes the pollutant which shows 2nd Embodiment of this invention. It is the external view and sectional drawing structural drawing of the apparatus (cabinet for chemical hazard countermeasures) equipped with the HEPA filter which removes the contaminant which shows 3rd Embodiment of this invention. It is a cross-sectional structure figure of the state which took out the HEPA filter of the apparatus (Cabinet for chemical hazard countermeasures) equipped with the HEPA filter which removes the contaminant which shows 3rd Embodiment of this invention. It is the external view of the apparatus (Chemical hazard countermeasure cabinet) equipped with the HEPA filter which removes the pollutant which shows 4th Embodiment of this invention, and a partial cross section figure. It is a partial cross-section figure of the state which took out the HEPA filter of the apparatus (Cabinet for chemical hazard countermeasures) equipped with the HEPA filter which removes the contaminant which shows 4th Embodiment of this invention. It is the external view of the apparatus (the cabinet for chemical hazard countermeasures) equipped with the HEPA filter which removes the pollutant which shows 5th Embodiment of this invention, and a partial cross section figure. It is a partial cross-section figure of the state which took out the HEPA filter of the apparatus (Cabinet for chemical hazard countermeasures) equipped with the HEPA filter which removes the contaminant which shows 5th Embodiment of this invention. It is the external view and sectional drawing structural drawing of the apparatus (Chemical hazard countermeasure cabinet) equipped with the HEPA filter which removes the pollutant by a prior art. It is sectional structure drawing of the state which took out the HEPA filter of the apparatus (Chemical Hazard Countermeasure Cabinet) equipped with the HEPA filter which removes the pollutant by a prior art.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. The present invention includes each example, but is not limited thereto. Configurations that can be easily modified by those skilled in the art are included in the technical scope of the present invention.

  1A and 1B are an external view and a sectional view of a chemical hazard countermeasure cabinet showing a form of a first embodiment of the present invention.

  As in the prior art (FIGS. 11 and 12) described above, the airflow is formed by forming a work opening 6 under the front shutter 4 and sucking air outside the apparatus from the work opening 6 to form an inflow airflow 7. . The inflow air 7 enters the work space 3 and is sucked into the prefilter 11, the contaminant 10 contained in the air is removed by the HEPA filter 12, sucked into the blower 5, and an exhaust port 8 formed in the main body case 1 a. Further exhaust (exhaust air 9) is performed. In addition, the white arrow in a figure has shown the flow of air. The worker 21 inserts an arm into the work space 3 from the work opening 6 and handles experimental materials in the work space 3. The inflow airflow 7 formed in the front opening 6 prevents the contaminant 10 in the work space 3 from leaking out of the chemical hazard countermeasure cabinet 1.

  In the first embodiment, the exhaust space 22 is formed below the work table 2 adjacent to the vicinity of the work space 3, and the HEPA filter 12 is disposed in the exhaust space 22 below the work table 2. A plastic bag 15 attached to a plastic bag attachment flange 16 is disposed on the front surface (operator side) of the HEPA filter 12. The vinyl bag 15 partitions the inside and the outside of the main body 1a. As long as the HEPA filter 12 is disposed in the exhaust space 22 adjacent to the vicinity of the work space 3, the HEPA filter 12 does not necessarily have to be disposed below the work table 2. If it is a structure, workability is also good. Further, it is not necessary to explain that the plastic bag 15 does not have to be made of vinyl as long as it has a bag shape that does not leak contaminated air.

  Since the inside of the plastic bag 15 is on the clean air side of the HEPA filter 12 and the outside of the plastic bag 15 is on the general air side, to the vinyl bag mounting flange 16 of the plastic bag 15 by any chance. However, even if there is a place where air passes, general air is sucked into the blower 5 and exhausted. In the case of the prior art, there is a possibility that the pollutant 10 is exhausted through the gap between the plastic bag 15 and the plastic bag mounting flange 16.

  A cover 19 is detachably attached to the front surface of the plastic bag attachment flange 16. The packing 14 is attached to the main body case 1a side of the cover 19 to partition the inside and the outside of the main body case 1a.

  The airflow around the attachment portion of the HEPA filter 12 is that the airflow sucked from the prefilter 11 flows to the HEPA filter 12 side, the contaminant 10 is filtered by the HEPA filter 12, and the airflow flowing below the HEPA filter 12 is The direction is changed upward, and the air is sucked into the blower 5.

  The downwardly directed airflow through the HEPA filter 12 changes direction to go to the upper blower 5, but the means may be U-turned through the backside or side of the HEPA filter 12.

  FIG. 2 is a cross-sectional structure diagram showing a state where the HEPA filter of the chemical hazard countermeasure cabinet according to the first embodiment of the present invention is taken out.

  When taking out the HEPA filter 12 to which the contaminant 10 adheres, the cover 19 is removed, and the HEPA filter 12 is removed through the plastic bag 15b. At this time, since the plastic bag 15b is attached to the plastic bag attachment flange 16, the air inside and outside the main body case 1a is blocked. The HEPA filter 12 is taken out of the main body case 1a while being put in the plastic bag 15b. After taking out, the center of the plastic bag 15b is cut by the cutting and welding machine 18 while sealing the HEPA filter 12. By this work, it becomes possible to take out the HEPA filter 12 to which the pollutant 10 is adhered in a state of being sealed with the vinyl bag 15b. A method for attaching the new HEPA filter 12 and the new plastic bag 15 is omitted.

  In the present invention, as in the configuration described above, the HEPA filter 12 to be replaced is arranged in the exhaust space 22 adjacent to the vicinity of the work space 3, so that the contaminated area in the apparatus can be reduced.

  The series of replacement operations of the HEPA filter 12 can be performed in the general air outside the chemical hazard countermeasure cabinet 1. On the other hand, in the exchange work from the work space 3 side as in the conventional method, experimental equipment is usually arranged in the work space 3 in many cases. There is a possibility that contaminants are attached to the experimental equipment, and there is a risk that the contaminants are carried out of the taken out plastic bag 15b. In the present invention, the HEPA filter 12 can be exchanged regardless of the experimental equipment by taking out the HEPA filter 12 from under the work table 2.

  FIG. 3 is an external view and a cross-sectional view of a chemical hazard countermeasure cabinet showing a form of a second embodiment of the present invention. The same reference numerals as those in FIGS. 1 and 2 indicate the same parts and will not be described in detail individually.

  In addition to the first embodiment, a sterilization tank 20 is provided below the HEPA filter 12 attached. The disinfecting tank 20 contains a disinfectant effective for the pollutant 10. The chemical hazard countermeasure cabinet 1 is used when handling a pollutant 10 that cannot be sterilized with gas or vapor such as formalin. When the HEPA filter 12 with the pollutant 10 attached is taken out for replacement, it is used together with the pollutant 10 in a bag. Alternatively, the HEPA filter 12 is hermetically sealed, or an effective chemical is sprayed on the pollutant 10 to invalidate the pollutant 10. However, it is unknown whether the chemical has completely adhered to the pollutant 10 at the level of spraying.

  FIG. 4 is a sectional structural view showing a state in which the HEPA filter of the chemical hazard countermeasure cabinet according to the second embodiment of the present invention is taken out.

  The HEPA filter 12 is removed through the plastic bag 15 and immersed in the disinfection tank 20 containing the disinfectant. By this operation, the contaminant 10 adhering to the HEPA filter 12 is sterilized and sterilized. Thereafter, the HEPA filter 12 is removed from the main body case 1a through the plastic bag 15b, and the HEPA filter 12 is taken out while being sealed in the plastic bag 15b in the same manner as in the first embodiment. Since the contaminant 10 adhering to the HEPA filter 12 is sterilized and sterilized, even if the plastic bag 15 is broken, the contaminant 10 does not leak outside.

  FIG. 5 is an external view and a cross-sectional structural view of a chemical hazard countermeasure cabinet showing the form of the third embodiment of the present invention. The same reference numerals as those in FIGS. 1 to 4 indicate the same parts and will not be described in detail individually.

  Below the HEPA filter 12, there is a space through which airflow flows, and a vinyl bag 15 attached to the plastic bag mounting flange 16 is disposed below the space. The vinyl bag 15 partitions the inside and the outside of the main body 1a. It is arranged below the HEPA filter 12. A cover 19 is disposed so as to cover the plastic bag 15 and the plastic bag mounting flange 16.

  FIG. 6 is a cross-sectional structure diagram showing a state where the HEPA filter of the chemical hazard countermeasure cabinet according to the third embodiment of the present invention is taken out.

  When the HEPA filter fastener 17 is removed and the HEPA filter 12 is removed, the HEPA filter 12 falls and enters the vinyl bag 15, so that the HEPA filter 12 can be removed very easily.

  After the HEPA filter 12 is put into the pulled out plastic bag 15 b, the HEPA filter 12 is sealed in the plastic bag 15 by the cutting and welding machine 18.

  7A and 7B are an external view and a partial cross-sectional view of a chemical hazard countermeasure cabinet showing a fourth embodiment of the present invention. The same reference numerals as those in FIGS. 1 to 6 denote the same parts and will not be described in detail individually.

  A plastic bag mounting flange 16 is disposed on the side surface of the main body case 1a in the lateral direction of the air outflow side of the HEPA filter 12 in the chemical hazard countermeasure cabinet 1. A plastic bag 15 is attached to the plastic bag mounting flange 16 to partition the inside and the outside of the apparatus. The plastic bag 15 is covered with a cover 19.

  FIG. 8 is a partial cross-sectional structure diagram showing a state where the HEPA filter of the chemical hazard countermeasure cabinet according to the fourth embodiment of the present invention is taken out.

  When taking out the HEPA filter 12, the cover 19 is removed from the side surface of the chemical hazard countermeasure cabinet 1, the HEPA filter fastener 17 is removed through the plastic bag 15, and the HEPA filter 12 is taken out while being put in the plastic bag 15. Thereafter, the HEPA filter 12 is hermetically sealed in the plastic bag 15 by the cutting and welding machine 18. This series of operations can be performed in general air on the side surface of the chemical hazard countermeasure cabinet 1.

  In the fourth embodiment of the present invention, the contamination region in the apparatus is reduced by directly attaching the vinyl bag 15 and the cover 19 for taking out the HEPA filter 12 to the side of the apparatus.

  FIG. 9 is an external view of a chemical hazard countermeasure cabinet showing a form of a fifth embodiment of the present invention, and a partial cross-sectional structural view. The same reference numerals as those in FIG. 1 to FIG. 8 indicate the same parts and will not be described in detail individually.

  5th Example of this invention arrange | positions the disinfection tank 20 between the HEPA filter 12 and the plastic bag 15 with respect to the form of 4th Example.

  FIG. 10 is a partial cross-sectional structure diagram showing a state where the HEPA filter of the chemical hazard countermeasure cabinet according to the fifth embodiment of the present invention is taken out.

  In the fifth embodiment, when the HEPA filter 12 to which the contaminant 10 is attached is taken out in the same manner as in the second embodiment, the HEPA filter 12 can be taken out after being sterilized and sterilized in the disinfection tank 20 once. .

  According to the above embodiment, when the HEPA filter to which the contaminant is attached is taken out in the chemical hazard countermeasure cabinet, the replacement work of the HEPA filter can be performed in the general air in which the contaminant does not exist.

  Moreover, even if the sealing property of the plastic bag and the plastic bag mounting flange is insufficient, it is possible to configure a chemical hazard countermeasure cabinet in which contaminants do not leak.

1 ... Equipment equipped with HEPA filter to remove pollutants (Chemical Hazard Countermeasure Cabinet)
DESCRIPTION OF SYMBOLS 1a ... Main body case 2 ... Worktable 3 ... Work space 4 ... Front shutter 5 ... Fan 6 ... Work opening 7 ... Inflow airflow 8 ... Exhaust port 9 ... Exhaust air 10 ... Pollutant 11 ... Prefilter 12 ... HEPA filter 13 ... Work chamber cover 14 ... packing 15 ... plastic bag 16 ... plastic bag mounting flange 17 ... HEPA filter fastener 18 ... cutting and welding machine 19 ... cover 20 ... disinfection tank 21 ... worker 22 ... exhaust space

Claims (3)

A working space provided in the apparatus; an exhaust system for discharging air from the working space to the outside of the apparatus by a blower; a HEPA filter provided in a flow path of the exhaust system for removing contaminants; A device for removing contaminants, comprising: a front shutter formed on the front surface; a work opening opened in a work space below the front shutter; and a work table disposed at a lower part of the work space;
The air blowing means is disposed above the work table and is located above.
An opening for removing the HEPA filter closed by a cover is formed in an apparatus outer wall near the work space, and a removable bag is attached to the opening closed by the cover. The inside and outside of the device is shielded by a possible bag,
For removal of the HEPA filter, remove accommodates the HEPA filter into the bag after removing the cover from the air side of the instrumentation置外,
The opening outside the apparatus of the HEPA filter, the removable bag, and the cover covering the bag portion are arranged on the operator side below the work table ,
An apparatus for removing contaminants, characterized in that an inner side of the bag is configured as a clean air side of the HEPA filter and an outer side of the bag is configured as general air .   2. The apparatus for removing contaminants according to claim 1, wherein an exhaust space is formed adjacent to a lower vicinity of the work space, the opening outside the apparatus of the HEPA filter, the removable bag, and the bag. The apparatus for removing contaminants, wherein the cover covering the portion is disposed in the exhaust space. The apparatus for removing contaminants according to claim 1 or 2, further comprising a drain tank for disinfection below the HEPA filter.

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