JP2022079117A - Clean booth - Google Patents

Abstract

To prevent the inflow or outflow of contaminated air by disposing a fan filter unit at an optical position, in each use form of a positive pressure mode and a negative pressure mode.SOLUTION: A clean booth is composed of a surrounding body 2 that has at least a side wall portion 3 and a ceiling portion 4, and is equipped with a gateway 5 at a part of the side wall portion 3, and an air-supply fan filter unit 6 and an exhaust FFU 7 attached to the ceiling portion 4. Pressure in a space partitioned by the surrounding body 2 can be switched to positive pressure and negative pressure, and a layout of an air-supply FFU 6 and the exhaust FFU 7 is different in each use form of a positive pressure mode and a negative pressure more. In the positive pressure mode, the exhaust FFU 7 is disposed on a proximal side to the gateway 5, and the air-supply FFU 6 is disposed on a distal side from the gateway 5. In the negative pressure mode, the air-supply FFU 6 is disposed on the proximal side to the gateway 5, and the exhaust FFU 7 is disposed on the distal side from the gateway 5.SELECTED DRAWING: Figure 16

Description

The present invention relates to a clean booth including a fan filter unit for air supply and a fan filter unit for exhaust, and the fan filter unit is arranged at an optimum position in each usage mode of positive pressure mode and negative pressure mode.

With technological innovations in various fields, the needs for air quality in various industries have diversified and changed widely, and clean booths that can be easily constructed are being actively developed. It is expected that the clean booth will be used not only for general industries that require clean air, but also for social needs in the future to prevent infectious diseases caused by the spread of infections such as viruses and to secure a clean space.

In the clean booth, a panel is fitted into a frame member consisting of columns and crosspieces to form a space separated from the outside world, and a filter unit with a fan is provided at a predetermined location on the ceiling to send clean air into the space. The cleanliness inside the space is maintained or the contaminated air inside the space is discharged so that the contaminated air does not leak from the inside of the space.

Many improvements have been made to such clean booths, and those that can be easily constructed and can be used in various fields such as air infection isolation rooms, regenerative medicine, and cell culture rooms have been developed. There is.

For example, in Patent Document 1 below, as a clean booth capable of switching between positive pressure and negative pressure, a housing having both sides facing each other and having an apex between the two sides and one of the two sides of the housing A suction opening for sucking in the formed air, a blowout opening for blowing out the air formed on the other side of both sides thereof, an air passage communicating the two openings in the housing, and an air passage arranged in the air passage, the same. An air unit device including an air source for generating an air flow from the suction opening to the outlet opening along the air passage and a filter for purifying the air from the suction opening, and a ceiling surface portion and a circumference. An enclosure having a wall surface portion and forming a booth chamber inward, and the peripheral wall surface portion forming a peripheral wall of the booth chamber in cooperation with either one of both sides of the housing and the surrounding body. A clean booth is disclosed that includes a frame assembly that selectively supports the enclosure on either side of either side of the housing.

Further, in Patent Document 2 below, as a clean booth in which a filter unit with a fan can be provided in two or more rows vertically and horizontally on the ceiling of the clean booth, a fan composed of a fan and a filter and having an air outlet on the lower surface. A clean booth with a filter unit with a fan attached to the mounting frame, and the filter unit with a fan is locked so that the center of the bottom surface is open and a mounting piece is formed on the peripheral edge and extends outward along the upper edge of the side wall. It is attached to the mounting frame via a butt-shaped receiving member provided with a piece, and the filter unit with a fan is placed on the mounting piece of the bat-shaped receiving member via a sealing material, and the butt-shaped receiving member is mounted. The locking piece is attached to the mounting frame via the sealing material, and at the same time, the shielding material is narrowed between the locking piece and the mounting frame, and the mounting frame is attached to three or more longitudinal frame members and these. A clean booth configured in a grid-like mounting frame with short frame members bridged between the longitudinal frame members is disclosed.

Further, in Patent Document 3 below, when adjusting to positive pressure or negative pressure, the adjustment method is simple, and the internal space partitioned by the booth body as a clean booth with improved shielding inside and outside the clean booth. One or more gas transfer means that perform at least one of gas transfer to and from the internal space, and airtightness at the bottom of the installed booth body provided at the bottom of the wall surface side of the booth body. A member including an elastic member for ensuring the property is disclosed.

Japanese Unexamined Patent Publication No. 2010-255902 Japanese Unexamined Patent Publication No. 2006-266681 Japanese Unexamined Patent Publication No. 2011-231989

However, in the clean booths described in Patent Documents 1 to 3, since the arrangement of the air unit device and the fan filter unit is fixed, the position of the pollution source in the booth and the use of the positive pressure mode and the negative pressure mode are used. The flow of air in the form is not taken into consideration. Therefore, contaminated air may diffuse into the booth or be discharged outside the booth.

That is, during positive pressure mode operation, outdoor contaminated air may flow in from the doorway and the booth may not be filled with stable clean air, and during negative pressure mode operation, the contaminated air inside the booth may enter from the doorway. It may leak to the outside and the contaminated air may not be retained in the booth.

Therefore, a main object of the present invention is to provide a clean booth in which a fan filter unit is arranged at an optimum position in each of the positive pressure mode and the negative pressure mode to prevent the inflow or outflow of contaminated air.

In order to solve the above problems, as the present invention according to claim 1, a surrounding body having at least a side wall portion and a ceiling portion and having an entrance / exit in a part of the side wall portion, and an air supply attached to the ceiling portion. It is a clean booth consisting of a fan filter unit for exhaust and a fan filter unit for exhaust.
The pressure inside the space partitioned by the enclosure can be switched between positive pressure and negative pressure, and in each usage mode of positive pressure mode and negative pressure mode, the fan filter unit for air supply and the fan filter unit for exhaust are used. A clean booth will be provided characterized by different placement of fan filter units.

In the invention according to claim 1, the contaminated air outside the room is prevented from flowing into the booth from the doorway during the positive pressure mode operation, and the contaminated air inside the booth is prevented from flowing into the booth from the doorway during the negative pressure mode operation. In order to prevent leakage, the arrangement of the fan filter unit for air supply and the fan filter unit for exhaust in each usage mode of positive pressure mode and negative pressure mode prevents the inflow or outflow of contaminated air in each mode. It is in the optimum position where it can be done. This makes it possible to reliably suppress the inflow or outflow of contaminated air.

According to the second aspect of the present invention, in the positive pressure mode, the exhaust fan filter unit is arranged on the side close to the entrance and exit, and the air supply fan filter unit is arranged on the side far from the entrance and exit.
The clean booth according to claim 1, wherein in the negative pressure mode, the fan filter unit for air supply is arranged on the side close to the entrance and exit, and the fan filter unit for exhaust is arranged on the side far from the entrance and exit. Provided.

The invention according to claim 2 defines the positional relationship in which the fan filter unit for air supply and the fan filter unit for exhaust air are arranged in each of the positive pressure mode and the negative pressure mode. Specifically, in the positive pressure mode, the outdoor air flowed in from the doorway in consideration of the usage situation that prevents the outdoor air from flowing in from the doorway by setting the indoor air pressure higher than the outdoor air pressure. As a result of air flow simulation assuming a case, by arranging the fan filter unit for exhaust on the side near the doorway and the fan filter unit for air supply on the side far from the doorway, the contaminated air in the booth. Is minimized and the booth can be kept in clean air. On the other hand, in the negative pressure mode, when the pollution source exists in the room far from the doorway, considering the usage situation that the air pressure in the booth is prevented from flowing out from the doorway by setting the air pressure in the room lower than the outside. As a result of performing an airflow simulation assuming that, by arranging the fan filter unit for air supply on the side near the doorway and the fan filter unit for exhaust on the side far from the doorway, the contaminated air in the booth It is possible to prevent the air from flowing out of the booth from the doorway.

According to the third aspect of the present invention, in a plan view, the ceiling portion is divided into 12 squares of 3 columns × 4 rows with respect to the entrance / exit.
In the positive pressure mode, the fan filter unit for exhaust is arranged in any of the 3 squares in the 1st row adjacent to the doorway, and the 6 squares in the 3rd and 4th rows far from the doorway. Place the fan filter unit for air supply in one of them,
In the negative pressure mode, the fan filter unit for air supply is placed in any of the 6 squares in the first row and the second row adjacent to the doorway, and the second column on the side far from the doorway is excluded. The clean booth according to any one of claims 1 and 2 in which the fan filter unit for exhaust is arranged in any of the 5 squares in the rows and the fourth row is provided.

In the invention according to claim 3, the ceiling portion is divided into 12 squares of 3 vertical columns x 4 horizontal rows in a plan view of the clean booth, and is used for air supply in each of the positive pressure mode and the negative pressure mode. The optimum mass position for arranging the fan filter unit and the fan filter unit for exhaust is specified.

As the present invention according to claim 4, the clean booth according to any one of claims 1 to 3 is provided, wherein the fan filter unit for air supply and the fan filter unit for exhaust are each arranged one or more. ..

In the invention according to claim 4, one or a plurality of fan filter units for air supply and fan filter units for exhaust are arranged, respectively. Whether to use one unit or a plurality of units can be determined by airflow simulation.

According to the fifth aspect of the present invention, the ceiling portion is configured by attaching a plurality of unitized ceiling panels to the ceiling frame.
The clean booth according to any one of claims 1 to 4, wherein the ceiling panel includes a first ceiling panel on which the fan filter unit can be installed and a second ceiling panel on which the fan filter unit cannot be installed. ..

In the invention according to claim 5, the ceiling portion is configured by attaching a plurality of ceiling panel units to the ceiling frame, and the ceiling panel unit is used as the air supply fan filter unit or the exhaust fan filter. It is composed of a first ceiling panel on which the unit can be installed and a second ceiling panel on which the fan filter unit for air supply or the fan filter unit for exhaust cannot be installed. Therefore, by arranging the first ceiling panel in the mass portion where the fan filter unit is installed and arranging the second ceiling panel in the other mass portion, the arrangement of the fan filter unit can be easily changed. It will be possible.

As described in detail above, according to the present invention, the fan filter unit can be arranged at the optimum position in each of the positive pressure mode and the negative pressure mode, and the inflow or outflow of contaminated air can be prevented. become.

It is a perspective view of the clean booth 1 which concerns on this invention. It is a perspective view of the clean booth 1 with the panel 10 removed. It is a top view of the clean booth 1. It is a side view of the clean booth 1. It is a side view of the doorway side of the clean booth 1. It is a VI-VI line arrow view of FIG. It is an inner surface side perspective view of the side wall part 3. FIG. It is a top view of the ceiling part 4. It is a top view of the ceiling frame 20. The first ceiling panel 30 is shown, (A) is a plan view, and (B) and (C) are side views. The second ceiling panel 31 is shown, (A) is a plan view, and (B) and (C) are side views. The third ceiling panel 32 is shown, (A) is a plan view, (B) and (C) are side views, and (D) is a back view (view from the booth room side). The fourth ceiling panel 33 is shown, (A) is a plan view, and (B) and (C) are side views. The air supply fan filter unit 6 is shown, (A) is a side view, and (B) is a sectional view. The exhaust fan filter unit 7 is shown, (A) is a side view, and (B) is a sectional view. (A) is a plan view of the clean booth 1 showing the arrangement position of the air supply fan filter unit 6 and the exhaust fan filter unit 7 in the positive pressure mode and (B) in the negative pressure mode. It is the result of the airflow simulation in the positive pressure mode (No. 1). It is the result of the airflow simulation in the positive pressure mode (No. 2). It is the result (3) of the airflow simulation in the positive pressure mode. It is the result (4) of the airflow simulation in the positive pressure mode. This is the result of the airflow simulation in the negative pressure mode (No. 1). It is the result of the airflow simulation in the negative pressure mode (No. 2). It is the result of the airflow simulation in the negative pressure mode (No. 3). It is the result (4) of the airflow simulation in the negative pressure mode.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

The clean booth 1 according to the present invention is installed inside a building such as a research facility, an experimental facility, a medical facility, a manufacturing factory, etc., and has a safety waiting room, an infectious disease room, a drug adjustment room, various experiments, research, development, and culture. It is used for rooms, etc.

As shown in FIGS. 1 to 6, the clean booth 1 has at least a side wall portion 3 and a ceiling portion 4, and a surrounding body 2 having an entrance / exit 5 in a part of the side wall portion 3 and the ceiling portion. It is composed of an air supply fan filter unit 6 and an exhaust fan filter unit 7 attached to 4. Further, in the clean booth 1, the positive pressure mode in which the pressure inside the space partitioned by the enclosure 2 (hereinafter, also referred to as “indoor” or “inside the booth”) is set higher than the pressure outside the room is used. It is possible to switch to a negative pressure mode set lower than the outdoor pressure, and in each usage mode of the positive pressure mode and the negative pressure mode, the air supply fan filter unit 6 and the exhaust fan filter unit 7 are arranged. Is characterized by being different.

The surrounding body 2 is erected on the floor surface in the building, and is a space portion surrounded by two sets of side wall portions 3, 3 ... Facing each other surrounding the four side portions and the side wall portions 3, 3, ... With the ceiling portion 4 covering the upper surface, the inside is formed in a substantially rectangular parallelepiped shape or a cube shape with a hollow inside. As the floor surface, the floor surface of the building may be used as it is, or a floor portion that covers the lower surface of the space portion surrounded by the side wall portions 3, 3 ... May be separately provided.

The side wall portion 3 is bridged between a plurality of columns 8, 8 ... Made of metal such as aluminum or resin arranged at predetermined intervals, and adjacent columns 8, 8 in the vertical direction at predetermined intervals. It is fitted in a frame partitioned by a plurality of cross rails 9, 9 ... made of metal such as aluminum, resin, etc., and adjacent columns 8, 8 and cross rails 9, 9 while maintaining airtightness. It is composed of panels 10, 10 ... Made of transparent, translucent or opaque resin or the like.

Legs 11 to be installed on the floor of the building are provided at the lower ends of the columns 8, and the height of the legs 11 can be adjusted to adjust the installation height of the side wall 3. In this clean booth 1, since the frames are firmly connected to each other, it is not necessary to anchor the floor during installation.

As shown in FIG. 7, in order to ensure airtightness between the bottom portion of the side wall portion 3 and the floor surface of the building, a lower end airtight member 12 is provided at the lower end portion of the side wall portion 3. The lower end airtight member 12 is an airtight material made of a metal such as stainless steel, and is arranged on the lower end portion of the side wall portion 3 without a gap over the entire circumference.

As shown in FIGS. 2 and 6, a part of the side wall portion 3 is provided with an entrance / exit 5 including a sliding door or a hinged door for entering / exiting the booth. The doorway 5 is provided on any one of the side wall portions 3, 3 ... Of the four side wall portions 3, 3 ..., and is not provided on the other side wall portions 3 .... In the illustrated example, the doorway 5 is arranged at the center portion in the width direction of the side wall portion 3, but may be arranged at a position closer to the end portion in the width direction of the side wall portion 3.

As shown in FIGS. 1 and 2, an anterior chamber 13 that completely surrounds the doorway 5 is provided on the outside of the doorway 5. The anterior chamber 13 is provided by being connected to a side wall portion 3 provided with the doorway 5, and surrounds three sides of the anterior chamber side wall portions 14, 14 ..., The anterior chamber side wall portion 14 ..., And the side wall portion 3. It is composed of a ceiling portion 15 for the front room that covers the upper part of the space surrounded by. The side wall portion 14 for the front room is provided with an entrance / exit 16 for the front room, which is composed of a sliding door or a hinged door for entering / exiting the front room 13. Further, as shown in the illustrated example, the air supply fan filter unit 6 and / or the exhaust fan filter unit 7 may or may not be provided on the ceiling portion 15 for the front room. In order to suppress the inflow or outflow of air when the doorway 5 of the clean booth 1 is opened, it is preferable to provide the front chamber 13 as shown in the illustrated example, but it may not be provided in some cases.

Next, the ceiling portion 4 will be described with reference to FIGS. 8 to 12. 8 is a plan view showing an assembled state of the ceiling portion 4, FIG. 9 is a plan view of the ceiling frame 20, and FIGS. 10 to 12 are views showing various ceiling panels 30 to 32. The ceiling portion 4 is configured by attaching various unitized ceiling panels 30 to 32 shown in FIGS. 10 to 12 to the ceiling frame 20 shown in FIG. 9.

As shown in FIG. 9, the ceiling frame 20 has a pair of facing side wall portions 3, 3 ... Including an upper end edge portion thereof and a side wall portion 3 provided with the doorway 5 among them. It is composed of two beam members 21, 21 suspended between the upper end edges of the side wall portions 3, 3 and partitioning a substantially square upper opening surrounded by the side wall portions 3, 3 ... into three rectangular openings. Has been done. One side of each of the upper end edges of the side wall portions 3 and 3 arranged in parallel with the extending direction of the beam members 21 and 21 and both side portions of the beam member 21 has an L-shaped cross section protruding toward the upper opening side. The ceiling panel mounting frame 22 is fixed (see also FIG. 7). As a result, the ceiling panel mounting frames 22 and 22 are provided so as to project on both sides of each of the rectangular openings divided into three, and the ceiling panels 30 to 32 as appropriate are provided between the ceiling panel mounting frames 22 and 22. The ceiling panel is fitted in the upper part of the space surrounded by the side wall portion 3 ... It is preferable that the beam members 21 and 21 are arranged so as to be bridged between the side wall portion 3 provided with the entrance / exit 5 of the clean booth 1 and the upper end edge of the side wall portion 3 facing the side wall portion 3. It may be arranged so as to be orthogonal to each other of the side walls 3 and 3 facing each other or between the side walls of both the vertical and horizontal directions.

When the front chamber 13 is provided outside the doorway 5 as shown in the illustrated example, the front chamber 13 is formed with a long rectangular upper opening in a direction parallel to the side wall portion 3 provided with the doorway 5. The side wall portion 14 for the anterior chamber is arranged. A ceiling panel mounting frame 23 for an anterior chamber having an L-shaped cross section, one side of which protrudes toward the upper opening side, is fixed to each of the upper end edges of the side wall portions 3 and 14 extending in the long side direction of the upper opening of the anterior chamber 13. An appropriate ceiling panel 30 to 33 is bridged between the ceiling panel mounting frames 23 and 23 for the front room.

As shown in FIG. 8, the ceiling panels 30 to 33 have a first ceiling panel 30 (FIG. 10) on which the fan filter units 6 and 7 can be installed, and the fan filter units 6 and 7 cannot be installed. A second ceiling panel 31 (FIG. 11) in which an opening cannot be formed, a third ceiling panel 32 (FIG. 12) provided with an opening / closing door for an inspection port, and a fourth ceiling panel 33 attached to the front chamber 13 (FIG. 11). It is composed of FIG. 13). These ceiling panels 30 to 33 are appropriately combined and installed on the ceiling frame 20. On each ceiling panel 30 to 33, handles 37, 37 protruding toward the outside of the booth room are provided at the center of the outer frames 34, 34 on both sides so that the ceiling panels 30 to 33 can be easily installed by hand. It is installed as needed.

As shown in FIGS. 10 to 12, the first ceiling panel 30, the second ceiling panel 31, and the third ceiling panel 32 are longitudinally within the frames of the outer frames 34, 34, ... A crosspiece member 35 is provided in the central portion of the longitudinal side divided into two equal parts, and a panel 36 made of a transparent, translucent or opaque resin or the like is provided in an airtightness in one of the spaces partitioned by the crosspiece member 35. Is fitted while being held. One side partitioned by the crosspiece member 35 corresponds to one square of the airflow simulation described later. Therefore, the ceiling panels 30 to 32 are formed in a size corresponding to two squares of the airflow simulation.

As shown in FIG. 10, the first ceiling panel 30 has two fans suspended between the outer frame 34 and the crosspiece 35 facing each other in the other space partitioned by the crosspiece 35. The filter unit mounting frames 38 and 38 are arranged with a predetermined separation width, and the fan filter unit mounting frames 38 and 38 are arranged as a space between the fan filter unit mounting frames 38 and 38, and the fan filter unit mounting frames 38 and the outer frame 34 are parallel to each other. A panel 39 made of a transparent, translucent or opaque resin or the like is fitted between the two, respectively, in a state where the airtightness is maintained.

As shown in FIG. 11, the second ceiling panel 31 is made of a transparent, translucent or opaque resin or the like in the other space portion partitioned by the crosspiece member 35, similarly to the one space portion. The panel 36 is fitted while maintaining airtightness.

As shown in FIG. 12, the third ceiling panel 32 is provided with an inspection door 40 that can be opened and closed in the other space partitioned by the crosspiece member 35. In the inspection door 40, the side portion on the crosspiece 35 side is rotatably supported by the hinges 41 and 41, and the claws are engaged with the outer frame 34 by the rotation operation on the side portion facing the hinges 41 and 41. Opening / closing screws 42, 42 for switching between non-rotatable and rotatable inspection doors 40 are provided. An airtight member or the like may be arranged between the inspection door 40 and the outer frame 34 and the crosspiece member 35, but the airtightness of the inspection door 40 in the closed state is provided by the contact between them with almost no gap. Since the property is ensured, it is usually not necessary to arrange an airtight member.

As shown in FIG. 13, the fourth ceiling panel 33 has about half the size of the first ceiling panel 30, the second ceiling panel 31, and the third ceiling panel 32. A panel 44 made of a transparent, translucent or opaque resin or the like is fitted in a frame partitioned by outer frames 43, 43 ... In a state where airtightness is maintained. The fourth ceiling panel 33 is mainly used as a ceiling panel of the anterior chamber 13, and is used when the anterior chamber 13 is formed in a range narrower than the width of one side wall portion 3 of the clean booth 1. ing.

The first ceiling panel 30, the second ceiling panel 31, and the third ceiling panel 32 are arranged so that their longitudinal sides coincide with the direction in which the ceiling panel mounting frame 22 extends. In the embodiment shown in FIG. 8, the ceiling panels 30 to 32 are arranged in the longitudinal direction with respect to the three space portions partitioned by the beam members 21 and 21. The ceiling panels 30 to 32 can be arranged in different directions in the longitudinal direction, whereby the positions of the fan filter units 6 and 7 and the positions of the fan filter units 6 and 7 are particularly high in the first ceiling panel 30 and the third ceiling panel 32. The position of the inspection port can be set arbitrarily.

On the other hand, the fourth ceiling panel 33 is arranged with its short sides aligned with the direction in which the front room ceiling panel mounting frame 23 extends.

The ceiling panels 30 to 33 are merely placed on the ceiling panel mounting frames 22 and 23, and are not particularly fixed. As a result, the clean booth 1 can be easily assembled and disassembled, and the layout of the ceiling panel can be easily changed. On the other hand, the ceiling panels 30 to 33 may be fixed to the ceiling frame 20. As the fixing method, a screw fastening method using bolts or the like can be used.

The outer peripheral portion of the outer frame 34 on the short side of the first ceiling panel 30, the second ceiling panel 31, and the third ceiling panel 32 and the outer peripheral portion of the outer frame 34 on the longitudinal side of the fourth ceiling panel 33 have side walls. An airtight member 45 for maintaining airtightness with the portions 3 and 14 or an adjacent ceiling panel is provided. That is, among the outer frames of the ceiling panels 30 to 33, the airtight member 45 is provided on the outer peripheral portion of the outer frame that is not mounted on the ceiling panel mounting frames 22 and 23. In the portion where the outer frames 34 and 43 of the ceiling panels 30 to 33 are placed on the ceiling panel mounting frames 22 and 23, the outer frames 34 and 43 are in close contact with the ceiling panel mounting frames 22 and 23 due to the weight of the ceiling panels 30 to 33. Since the airtightness between them is maintained, it is not necessary to provide an airtight member between them, but in a portion where the ceiling panel mounting frames 22 and 23 are not provided or between adjacent ceiling panels. Since the airtightness cannot be maintained, it is desirable to provide the airtight member 45. In order to obtain a more reliable airtight structure, an airtight member may be arranged between the outer frames 34 and 43 of the ceiling panels 30 to 33 and the ceiling panel mounting frames 22 and 23.

Next, as the air supply fan filter unit 6, a general filter unit with a fan that passes through the filter and supplies the purified outdoor air to the room can be used, and the specific structure is as follows. As shown in FIG. 14, an air intake port 6a is formed on the upper surface and an air outlet 6b is formed on the lower surface, and a fan 6c and a main filter 6d are provided inside thereof. The outdoor air taken in from the air intake port 6a passes through the main filter 6d to be cleaned, and then is supplied into the booth from the air outlet 6b. As the main filter 6d, a HEPA filter, a ULPA filter, or the like can be used. Further, as shown in the illustrated example, a pre-filter 6e made of a saran net filter or the like can be installed in the air intake port 6a.

As the exhaust fan filter unit 7, a general filter unit with a fan that passes through the filter and exhausts the cleaned indoor air to the outside can be used, and the specific structure is shown in FIG. An air intake port 7a is formed on the lower surface and an air outlet 7b is formed on the upper surface, and a fan 7c and a main filter 7d are provided inside the air intake port 7a. The indoor air taken in from 7a, passed through the main filter 7d, and cleaned is exhausted to the outside from the air outlet 7b. As the main filter 7d, a HEPA filter, a ULPA filter, or the like can be used. Further, as shown in the illustrated example, a prefilter 7e made of a non-woven fabric or the like, a punching metal, or the like can be installed at the air outlet 7b to prevent contact or prevent falling dust.

The air supply fan filter unit 6 and the exhaust fan filter unit 7 have a resin on the upper part of the frame surrounded by the outer frame 34 of the first ceiling panel 30, the crosspiece member 35, and the fan filter unit mounting frames 38, 38. It is placed via an airtight member (not shown) made of rubber or rubber. Since it is placed via the airtight member, airtightness can be ensured without screwing, and the fan filter units 6 and 7 are less likely to be displaced. Further, since the fan filter units 6 and 7 are not screwed, the clean booth 1 can be easily assembled and disassembled, and the layout of the ceiling panel can be easily changed.

The air supply fan filter unit 6 and the exhaust fan filter unit 7 may be arranged one or more, respectively. That is, one or a plurality of fan filter units 6 and 7 can be arranged for the clean booth 1, respectively.

In the present clean booth 1 having the above configuration, the pressure in the room of the clean booth 1 can be switched between positive pressure and negative pressure. During positive pressure operation, + 5 Pa or more can be secured, and during negative pressure operation, -2.5 Pa or less can be secured in accordance with the air infection isolation room according to the CDC (Centers for Disease Control and Prevention) guidelines. In the positive pressure mode, the air outside the booth is supplied to the booth by the air supply fan filter unit 6, and the air volume is adjusted so that the inside of the booth becomes a positive pressure environment with a higher pressure than the outside of the booth. In the positive pressure mode, it can be used as a waiting place for doctors, nurses, etc. that suppresses the inflow of contaminated air, and stable clean air can be supplied to the booth, so it is an industry that requires a clean air environment. It can also be used as a clean booth. The cleanliness in the booth varies depending on the environment around the booth, flooring, etc., but it is possible to achieve a maximum of Class 5 (the number of fine particles of 0.5 μm or more in 1 m ² according to ISO 14644-1 is 3520 or less). can. On the other hand, in the negative pressure mode, the air inside the booth is exhausted to the outside of the booth by the exhaust fan filter unit 7, and the air volume is adjusted so that the inside of the booth becomes an environment of negative pressure whose pressure is lower than that outside the booth. In the negative pressure mode, by preventing the contaminated air from leaking to the outside in the booth, it can be used as a temporary hospital room when an infectious disease occurs, a temporary air infection isolation room, etc., as well as experiments such as regenerative medicine and drug adjustment. It can also be used for such purposes.

Further, in the clean booth 1, the arrangement of the air supply fan filter unit 6 and the exhaust fan filter unit 7 is different in each usage mode of the positive pressure mode and the negative pressure mode. That is, in the plan view of the clean booth 1, the positions where the air supply fan filter unit 6 and the exhaust fan filter unit 7 are arranged during the positive pressure mode operation, and the air supply fan filter unit 6 and the exhaust during the negative pressure mode operation. The positions where the fan filter units 7 are arranged are different.

During the positive pressure mode operation, the outdoor contaminated air is prevented from flowing into the booth from the doorway 5, and during the negative pressure mode operation, the contaminated air inside the booth is prevented from leaking to the outside from the doorway 5. Therefore, in this clean booth 1, in each of the positive pressure mode and the negative pressure mode, the air supply fan filter unit 6 and the exhaust fan filter unit 7 are prevented from flowing in or out of contaminated air in each mode. It is placed in the optimum position where it can be done. Therefore, in any mode of use of the positive pressure mode and the negative pressure mode, the inflow or outflow of contaminated air can be prevented, and the function as a clean booth can be more reliably enhanced.

More specifically, the relative positional relationship between the air supply fan filter unit 6 and the exhaust fan filter unit 7 in each operation mode will be described more specifically. As shown in FIG. 16, in the positive pressure mode, it is close to the doorway 5. The exhaust fan filter unit 7 is arranged on the side, the air supply fan filter unit 6 is arranged on the side far from the entrance / exit 5, and the air supply fan filter unit 6 is arranged on the side close to the entrance / exit 5 in the negative pressure mode. At the same time, it is preferable to arrange the exhaust fan filter unit 7 on the side far from the doorway 5.

In the positive pressure mode, it is assumed that the outdoor air flows in from the doorway 5 in consideration of the usage situation that prevents the outdoor air from flowing in from the doorway 5 by setting the indoor air pressure higher than the outdoor air pressure. As a result of performing the air flow simulation, as shown in FIG. 16A, the exhaust fan filter unit 7 is arranged on the side near the entrance / exit 5, and the air supply fan filter unit 6 is arranged on the side far from the entrance / exit 5. By arranging it, the contaminated air flowing in from the doorway 5 is minimized to diffuse into the room, and the inside of the booth can be kept in clean air.

On the other hand, in the negative pressure mode, there is a pollution source in the room far from the doorway 5 in consideration of the usage situation that the air inside the booth is prevented from flowing out from the doorway 5 by setting the air pressure in the room lower than the outside. As a result of performing an airflow simulation assuming the case of the above, as shown in FIG. 16B, the air supply fan filter unit 6 is arranged on the side near the doorway 5, and the exhaust fan is placed on the side far from the doorway 5. By arranging the filter unit 7, it is possible to prevent the contaminated air in the booth from flowing out of the booth from the entrance / exit 5.

To explain more specifically based on the above-mentioned airflow simulation, in the airflow simulation, first, as shown in FIG. 16, the ceiling of the clean booth 1 is viewed in a plan view in three vertical rows with the doorway 5 as a reference. × Divide into 12 squares in 4 rows. The square numbers 1 to 12 were added laterally from the side closer to the doorway 5. This one square has substantially the same size as the size of one side of the ceiling panels 30 to 32 partitioned by the crosspiece member 35. That is, the first ceiling panel 30, the second ceiling panel 31, and the third ceiling panel 32 have a size of two squares in the vertical direction.

In the airflow simulation, in the positive pressure mode, maintaining the cleanliness inside the booth is the highest priority, preventing the inflow of contaminated air from the outside, and creating an environment where the contaminated air generated inside the room flows in five directions at the entrance and exit. In the negative pressure mode, the highest priority is to prevent the outflow of contaminated air generated in the booth room, and the goal is to create an environment in which the contaminated air in the room does not flow in the five entrances and exits.

The size of the clean booth 1 was 3 m in length × 3 m in width × 2.4 m in height. The size of the air outlet 6b of the air supply fan filter unit 6 was 600 mm × 600 mm and the flow rate was 600 CMH, and the size of the air intake port 7a of the exhaust fan filter unit 7 was 600 mm × 600 mm and the flow rate was 600 CMH. .. The air supply fan filter unit 6 and the exhaust fan filter unit 7 were installed in any of the above 12 squares.

The pollution source had a size of 300 mm × 300 mm and was installed on the floor. In the positive pressure mode, the entrance / exit 5 was assumed to be the pollution source, and the pollution source was placed at the position of the mass number 2. In the negative pressure mode, it was assumed that there was a pollution source in the back of the room (the side far from the doorway 5), and the cells were placed in either mass numbers 11 and 12.

The method of airflow simulation is that in the positive pressure mode and the negative pressure mode, the pollution source is installed at a predetermined position in the room, and the positions where the air supply fan filter unit 6 and the exhaust fan filter unit 7 are installed are changed. The diffusion status of contaminated air was compared.

As a result, in the positive pressure mode, as shown in FIGS. 16A, 17 and 18, the air is exhausted to one of the three cells in the first row (mass numbers 1 to 3) adjacent to the doorway 5. In addition to arranging the fan filter unit 7 for air supply, arrange the fan filter unit 6 for air supply in any of the 6 squares on the 3rd and 4th rows (mass numbers 7 to 12) on the side far from the doorway 5. As a result, it was clarified that the contaminated air flowing in from the entrance / exit 5 is not diffused over a wide area in the room and is easily discharged to the outside by the exhaust fan filter unit 7. On the other hand, as shown in FIGS. 19 and 20, if the air supply fan filter unit 6 and the exhaust fan filter unit 7 are arranged at other positions, the air flowing in from the entrance / exit 5 is likely to diffuse over a wide area in the room. Become.

Next, in the negative pressure mode, as shown in FIGS. 16B, 21 and 22, any of the 6 cells in the 1st and 2nd rows (mass numbers 1 to 6) adjacent to the doorway 5 Crab air supply fan filter unit 6 is arranged, and any of the 5 squares in the 3rd and 4th rows (mass numbers 7 and 9 to 12) excluding the 2nd column on the side far from the doorway 5 It has been clarified that by arranging the exhaust fan filter unit 7 in the room, the air diffused from the pollution source arranged in the back of the room is less likely to diffuse in the direction of the doorway 5 and can be prevented from flowing out from the doorway 5 to the outside. .. On the other hand, as shown in FIGS. 23 and 24, if the air supply fan filter unit 6 and the exhaust fan filter unit 7 are arranged at other positions, the contaminated air is likely to diffuse toward the entrance / exit 5.

1 ... clean booth, 2 ... enclosure, 3 ... side wall, 4 ... ceiling, 5 ... doorway, 6 ... air supply fan filter unit, 7 ... exhaust fan filter unit, 8 ... support, 9 ... cross rail, 10 ... panel, 11 ... legs, 12 ... lower end airtight member, 13 ... front room, 14 ... front room side wall, 15 ... front room ceiling, 16 ... front room doorway, 20 ... ceiling frame, 21 ... Beam member, 22 ... Ceiling panel mounting frame, 23 ... Ceiling panel mounting frame for front room, 30 ... 1st ceiling panel, 31 ... 2nd ceiling panel, 32 ... 3rd ceiling panel, 33 ... 4th ceiling panel, 34 ... Outer frame, 35 ... rail member, 36 ... panel, 37 ... handle, 38 ... fan filter unit mounting frame, 39 ... panel, 40 ... inspection door, 41 ... hinge, 42 ... open / close screw, 43 ... outer frame, 44 ... panel, 45 ... airtight member

The present invention relates to a clean booth including a fan filter unit for air supply and a fan filter unit for exhaust, and the fan filter unit is arranged at an optimum position in each usage mode of positive pressure mode and negative pressure mode.

With technological innovations in various fields, the needs for air quality in various industries have diversified and changed widely, and clean booths that can be easily constructed are being actively developed. It is expected that the clean booth will be used not only for general industries that require clean air, but also for social needs in the future to prevent infectious diseases caused by the spread of infections such as viruses and to secure a clean space.

In the clean booth, a panel is fitted into a frame member consisting of columns and crosspieces to form a space separated from the outside world, and a filter unit with a fan is provided at a predetermined location on the ceiling to send clean air into the space. The cleanliness inside the space is maintained or the contaminated air inside the space is discharged so that the contaminated air does not leak from the inside of the space.

Many improvements have been made to such clean booths, and those that can be easily constructed and can be used in various fields such as air infection isolation rooms, regenerative medicine, and cell culture rooms have been developed. There is.

For example, in Patent Document 1 below, as a clean booth capable of switching between positive pressure and negative pressure, a housing having both sides facing each other and having an apex between the two sides and one of the two sides of the housing A suction opening for sucking in the formed air, a blowout opening for blowing out the air formed on the other side of both sides thereof, an air passage communicating the two openings in the housing, and an air passage arranged in the air passage, the same. An air unit device including an air source for generating an air flow from the suction opening to the outlet opening along the air passage and a filter for purifying the air from the suction opening, and a ceiling surface portion and a circumference. An enclosure having a wall surface portion and forming a booth chamber inward, and the peripheral wall surface portion forming a peripheral wall of the booth chamber in cooperation with either one of both sides of the housing and the surrounding body. A clean booth is disclosed that includes a frame assembly that selectively supports the enclosure on either side of either side of the housing.

Further, in Patent Document 2 below, as a clean booth in which a filter unit with a fan can be provided in two or more rows vertically and horizontally on the ceiling of the clean booth, a fan composed of a fan and a filter and having an air outlet on the lower surface. A clean booth with a filter unit with a fan attached to the mounting frame, and the filter unit with a fan is locked so that the center of the bottom surface is open and a mounting piece is formed on the peripheral edge and extends outward along the upper edge of the side wall. It is attached to the mounting frame via a butt-shaped receiving member provided with a piece, and the filter unit with a fan is placed on the mounting piece of the bat-shaped receiving member via a sealing material, and the butt-shaped receiving member is mounted. The locking piece is attached to the mounting frame via the sealing material, and at the same time, the shielding material is narrowed between the locking piece and the mounting frame, and the mounting frame is attached to three or more longitudinal frame members and these. A clean booth configured in a grid-like mounting frame with short frame members bridged between the longitudinal frame members is disclosed.

Further, in Patent Document 3 below, when adjusting to positive pressure or negative pressure, the adjustment method is simple, and the internal space partitioned by the booth body as a clean booth with improved shielding inside and outside the clean booth. One or more gas transfer means that perform at least one of gas transfer to and from the internal space, and airtightness at the bottom of the installed booth body provided at the bottom of the wall surface side of the booth body. A member including an elastic member for ensuring the property is disclosed.

Japanese Unexamined Patent Publication No. 2010-255902 Japanese Unexamined Patent Publication No. 2006-266681 Japanese Unexamined Patent Publication No. 2011-231989

However, in the clean booths described in Patent Documents 1 to 3, since the arrangement of the air unit device and the fan filter unit is fixed, the position of the pollution source in the booth and the use of the positive pressure mode and the negative pressure mode are used. The flow of air in the form is not taken into consideration. Therefore, contaminated air may diffuse into the booth or be discharged outside the booth.

That is, during positive pressure mode operation, outdoor contaminated air may flow in from the doorway and the booth may not be filled with stable clean air, and during negative pressure mode operation, the contaminated air inside the booth may enter from the doorway. It may leak to the outside and the contaminated air may not be retained in the booth.

Therefore, a main object of the present invention is to provide a clean booth in which a fan filter unit is arranged at an optimum position in each of the positive pressure mode and the negative pressure mode to prevent the inflow or outflow of contaminated air.

In order to solve the above problems, as the present invention according to claim 1, a surrounding body having at least a side wall portion and a ceiling portion and having an entrance / exit in a part of the side wall portion, and an air supply attached to the ceiling portion. It is a clean booth consisting of a fan filter unit for exhaust and a fan filter unit for exhaust.
The pressure inside the space partitioned by the enclosure can be switched between positive pressure and negative pressure.
In the positive pressure mode, the exhaust fan filter unit is arranged on the side close to the doorway, and the air supply fan filter unit is placed on the side far from the doorway.
In the negative pressure mode, the clean booth is characterized in that the fan filter unit for air supply is arranged on the side close to the doorway and the fan filter unit for exhaust air is placed on the side far from the doorway. Provided.

In the invention according to claim 1, the contaminated air outside the room is prevented from flowing into the booth from the doorway during the positive pressure mode operation, and the contaminated air inside the booth is prevented from flowing into the booth from the doorway during the negative pressure mode operation. In order to prevent leakage, the arrangement of the fan filter unit for air supply and the fan filter unit for exhaust in each usage mode of positive pressure mode and negative pressure mode prevents the inflow or outflow of contaminated air in each mode. It is in the optimum position where it can be done. This makes it possible to reliably suppress the inflow or outflow of contaminated air.

Further , the invention according to claim 1 defines the positional relationship in which the fan filter unit for air supply and the fan filter unit for exhaust are arranged in each of the positive pressure mode and the negative pressure mode. Specifically, in the positive pressure mode, the outdoor air flowed in from the doorway in consideration of the usage situation that prevents the outdoor air from flowing in from the doorway by setting the indoor air pressure higher than the outdoor air pressure. As a result of air flow simulation assuming a case, by arranging the fan filter unit for exhaust on the side near the doorway and the fan filter unit for air supply on the side far from the doorway, the contaminated air in the booth. Is minimized and the booth can be kept in clean air. On the other hand, in the negative pressure mode, when the pollution source exists in the room far from the doorway, considering the usage situation that the air pressure in the booth is prevented from flowing out from the doorway by setting the air pressure in the room lower than the outside. As a result of performing an airflow simulation assuming that, by arranging the fan filter unit for air supply on the side near the doorway and the fan filter unit for exhaust on the side far from the doorway, the contaminated air in the booth It is possible to prevent the air from flowing out of the booth from the doorway.

According to the second aspect of the present invention, in a plan view, the ceiling portion is divided into 12 squares of 3 columns × 4 rows with respect to the entrance / exit.
In the positive pressure mode, the fan filter unit for exhaust is arranged in any of the 3 squares in the 1st row adjacent to the doorway, and the 6 squares in the 3rd and 4th rows far from the doorway. Place the fan filter unit for air supply in one of them,
In the negative pressure mode, the fan filter unit for air supply is placed in any of the 6 squares in the first row and the second row adjacent to the doorway, and the second column on the side far from the doorway is excluded. The clean booth according to claim 1 , wherein the fan filter unit for exhaust is arranged in any one of the five squares in the row and the fourth row is provided.

In the invention according to claim 2 , the ceiling portion is divided into 12 squares of 3 vertical columns x 4 horizontal rows in a plan view of the clean booth, and is used for air supply in each of the positive pressure mode and the negative pressure mode. The optimum mass position for arranging the fan filter unit and the fan filter unit for exhaust is specified.

As the present invention according to claim 3 , the clean booth according to claim 1 or 2 in which one or a plurality of the fan filter unit for air supply and the fan filter unit for exhaust are arranged respectively is provided. ..

In the invention according to claim 3 , one or a plurality of fan filter units for air supply and fan filter units for exhaust are arranged, respectively. Whether to use one unit or a plurality of units can be determined by airflow simulation.

According to the fourth aspect of the present invention, the ceiling portion is configured by attaching a plurality of unitized ceiling panels to the ceiling frame.
The clean booth according to any one of claims 1 to 3 , wherein the ceiling panel includes a first ceiling panel on which the fan filter unit can be installed and a second ceiling panel on which the fan filter unit cannot be installed. ..

In the invention according to claim 4 , a plurality of ceiling panel units are attached to the ceiling frame to form the ceiling portion, and the ceiling panel unit is used as the air supply fan filter unit or the exhaust fan filter. It is composed of a first ceiling panel on which the unit can be installed and a second ceiling panel on which the fan filter unit for air supply or the fan filter unit for exhaust cannot be installed. Therefore, by arranging the first ceiling panel in the mass portion where the fan filter unit is installed and arranging the second ceiling panel in the other mass portion, the arrangement of the fan filter unit can be easily changed. It will be possible.

As described in detail above, according to the present invention, the fan filter unit can be arranged at the optimum position in each of the positive pressure mode and the negative pressure mode, and the inflow or outflow of contaminated air can be prevented. become.

It is a perspective view of the clean booth 1 which concerns on this invention. It is a perspective view of the clean booth 1 with the panel 10 removed. It is a top view of the clean booth 1. It is a side view of the clean booth 1. It is a side view of the doorway side of the clean booth 1. It is a VI-VI line arrow view of FIG. It is an inner surface side perspective view of the side wall part 3. FIG. It is a top view of the ceiling part 4. It is a top view of the ceiling frame 20. The first ceiling panel 30 is shown, (A) is a plan view, and (B) and (C) are side views. The second ceiling panel 31 is shown, (A) is a plan view, and (B) and (C) are side views. The third ceiling panel 32 is shown, (A) is a plan view, (B) and (C) are side views, and (D) is a back view (view from the booth room side). The fourth ceiling panel 33 is shown, (A) is a plan view, and (B) and (C) are side views. The air supply fan filter unit 6 is shown, (A) is a side view, and (B) is a sectional view. The exhaust fan filter unit 7 is shown, (A) is a side view, and (B) is a sectional view. (A) is a plan view of the clean booth 1 showing the arrangement position of the air supply fan filter unit 6 and the exhaust fan filter unit 7 in the positive pressure mode and (B) in the negative pressure mode. It is the result of the airflow simulation in the positive pressure mode (No. 1). It is the result of the airflow simulation in the positive pressure mode (No. 2). It is the result of the airflow simulation in the positive pressure mode (No. 3). It is the result (4) of the airflow simulation in the positive pressure mode. This is the result of the airflow simulation in the negative pressure mode (No. 1). It is the result of the airflow simulation in the negative pressure mode (No. 2). It is the result of the airflow simulation in the negative pressure mode (No. 3). It is the result (4) of the airflow simulation in the negative pressure mode.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

The clean booth 1 according to the present invention is installed inside a building such as a research facility, an experimental facility, a medical facility, a manufacturing factory, etc., and has a safety waiting room, an infectious disease room, a drug adjustment room, various experiments, research, development, and culture. It is used for rooms, etc.

As shown in FIGS. 1 to 6, the clean booth 1 has at least a side wall portion 3 and a ceiling portion 4, and a surrounding body 2 having an entrance / exit 5 in a part of the side wall portion 3 and the ceiling portion. It is composed of an air supply fan filter unit 6 and an exhaust fan filter unit 7 attached to 4. Further, in the clean booth 1, the positive pressure mode in which the pressure inside the space partitioned by the enclosure 2 (hereinafter, also referred to as “indoor” or “inside the booth”) is set higher than the pressure outside the room is used. It is possible to switch to a negative pressure mode set lower than the outdoor pressure, and in each usage mode of the positive pressure mode and the negative pressure mode, the air supply fan filter unit 6 and the exhaust fan filter unit 7 are arranged. Is characterized by being different.

The surrounding body 2 is erected on the floor surface in the building, and is a space portion surrounded by two sets of side wall portions 3, 3 ... Facing each other surrounding the four side portions and the side wall portions 3, 3, ... With the ceiling portion 4 covering the upper surface, the inside is formed in a substantially rectangular parallelepiped shape or a cube shape with a hollow inside. As the floor surface, the floor surface of the building may be used as it is, or a floor portion that covers the lower surface of the space portion surrounded by the side wall portions 3, 3 ... May be separately provided.

The side wall portion 3 is bridged between a plurality of columns 8, 8 ... Made of metal such as aluminum or resin arranged at predetermined intervals, and adjacent columns 8, 8 in the vertical direction at predetermined intervals. It is fitted in a frame partitioned by a plurality of cross rails 9, 9 ... made of metal such as aluminum, resin, etc., and adjacent columns 8, 8 and cross rails 9, 9 while maintaining airtightness. It is composed of panels 10, 10 ... Made of transparent, translucent or opaque resin or the like.

Legs 11 to be installed on the floor of the building are provided at the lower ends of the columns 8, and the height of the legs 11 can be adjusted to adjust the installation height of the side wall 3. In this clean booth 1, since the frames are firmly connected to each other, it is not necessary to anchor the floor during installation.

As shown in FIG. 7, in order to ensure airtightness between the bottom portion of the side wall portion 3 and the floor surface of the building, a lower end airtight member 12 is provided at the lower end portion of the side wall portion 3. The lower end airtight member 12 is an airtight material made of a metal such as stainless steel, and is arranged on the lower end portion of the side wall portion 3 without a gap over the entire circumference.

As shown in FIGS. 2 and 6, a part of the side wall portion 3 is provided with an entrance / exit 5 including a sliding door or a hinged door for entering / exiting the booth. The doorway 5 is provided on any one of the side wall portions 3, 3 ... Of the four side wall portions 3, 3 ..., and is not provided on the other side wall portions 3 .... In the illustrated example, the doorway 5 is arranged at the center portion in the width direction of the side wall portion 3, but may be arranged at a position closer to the end portion in the width direction of the side wall portion 3.

As shown in FIGS. 1 and 2, an anterior chamber 13 that completely surrounds the doorway 5 is provided on the outside of the doorway 5. The anterior chamber 13 is provided by being connected to a side wall portion 3 provided with the doorway 5, and surrounds three sides of the anterior chamber side wall portions 14, 14 ..., The anterior chamber side wall portion 14 ..., And the side wall portion 3. It is composed of a ceiling portion 15 for the front room that covers the upper part of the space surrounded by. The side wall portion 14 for the front room is provided with an entrance / exit 16 for the front room, which is composed of a sliding door or a hinged door for entering / exiting the front room 13. Further, as shown in the illustrated example, the air supply fan filter unit 6 and / or the exhaust fan filter unit 7 may or may not be provided on the ceiling portion 15 for the front room. In order to suppress the inflow or outflow of air when the doorway 5 of the clean booth 1 is opened, it is preferable to provide the front chamber 13 as shown in the illustrated example, but it may not be provided in some cases.

Next, the ceiling portion 4 will be described with reference to FIGS. 8 to 12. 8 is a plan view showing an assembled state of the ceiling portion 4, FIG. 9 is a plan view of the ceiling frame 20, and FIGS. 10 to 12 are views showing various ceiling panels 30 to 32. The ceiling portion 4 is configured by attaching various unitized ceiling panels 30 to 32 shown in FIGS. 10 to 12 to the ceiling frame 20 shown in FIG. 9.

As shown in FIG. 9, the ceiling frame 20 has a pair of facing side wall portions 3, 3 ... Including an upper end edge portion thereof and a side wall portion 3 provided with the doorway 5 among them. It is composed of two beam members 21, 21 suspended between the upper end edges of the side wall portions 3, 3 and partitioning a substantially square upper opening surrounded by the side wall portions 3, 3 ... into three rectangular openings. Has been done. One side of each of the upper end edges of the side wall portions 3 and 3 arranged in parallel with the extending direction of the beam members 21 and 21 and both side portions of the beam member 21 has an L-shaped cross section protruding toward the upper opening side. The ceiling panel mounting frame 22 is fixed (see also FIG. 7). As a result, the ceiling panel mounting frames 22 and 22 are provided so as to project on both sides of each of the rectangular openings divided into three, and the ceiling panels 30 to 32 as appropriate are provided between the ceiling panel mounting frames 22 and 22. The ceiling panel is fitted in the upper part of the space surrounded by the side wall portion 3 ... It is preferable that the beam members 21 and 21 are arranged so as to be bridged between the side wall portion 3 provided with the entrance / exit 5 of the clean booth 1 and the upper end edge of the side wall portion 3 facing the side wall portion 3. It may be arranged so as to be orthogonal to each other of the side walls 3 and 3 facing each other or between the side walls of both the vertical and horizontal directions.

When the front chamber 13 is provided outside the doorway 5 as shown in the illustrated example, the front chamber 13 is formed with a long rectangular upper opening in a direction parallel to the side wall portion 3 provided with the doorway 5. The side wall portion 14 for the anterior chamber is arranged. A ceiling panel mounting frame 23 for an anterior chamber having an L-shaped cross section, one side of which protrudes toward the upper opening side, is fixed to each of the upper end edges of the side wall portions 3 and 14 extending in the long side direction of the upper opening of the anterior chamber 13. An appropriate ceiling panel 30 to 33 is bridged between the ceiling panel mounting frames 23 and 23 for the front room.

As shown in FIG. 8, the ceiling panels 30 to 33 have a first ceiling panel 30 (FIG. 10) on which the fan filter units 6 and 7 can be installed, and the fan filter units 6 and 7 cannot be installed. A second ceiling panel 31 (FIG. 11) in which an opening cannot be formed, a third ceiling panel 32 (FIG. 12) provided with an opening / closing door for an inspection port, and a fourth ceiling panel 33 attached to the front chamber 13 (FIG. 11). It is composed of FIG. 13). These ceiling panels 30 to 33 are appropriately combined and installed on the ceiling frame 20. On each ceiling panel 30 to 33, handles 37, 37 protruding toward the outside of the booth room are provided at the center of the outer frames 34, 34 on both sides so that the ceiling panels 30 to 33 can be easily installed by hand. It is installed as needed.

As shown in FIGS. 10 to 12, the first ceiling panel 30, the second ceiling panel 31, and the third ceiling panel 32 are longitudinally within the frames of the outer frames 34, 34, ... A crosspiece member 35 is provided in the central portion of the longitudinal side divided into two equal parts, and a panel 36 made of a transparent, translucent or opaque resin or the like is provided in an airtightness in one of the spaces partitioned by the crosspiece member 35. Is fitted while being held. One side partitioned by the crosspiece member 35 corresponds to one square of the airflow simulation described later. Therefore, the ceiling panels 30 to 32 are formed in a size corresponding to two squares of the airflow simulation.

As shown in FIG. 10, the first ceiling panel 30 has two fans suspended between the outer frame 34 and the crosspiece 35 facing each other in the other space partitioned by the crosspiece 35. The filter unit mounting frames 38 and 38 are arranged with a predetermined separation width, and the fan filter unit mounting frames 38 and 38 are arranged as a space between the fan filter unit mounting frames 38 and 38, and the fan filter unit mounting frames 38 and the outer frame 34 are parallel to each other. A panel 39 made of a transparent, translucent or opaque resin or the like is fitted between the two, respectively, in a state where the airtightness is maintained.

As shown in FIG. 11, the second ceiling panel 31 is made of a transparent, translucent or opaque resin or the like in the other space portion partitioned by the crosspiece member 35, similarly to the one space portion. The panel 36 is fitted while maintaining airtightness.

As shown in FIG. 12, the third ceiling panel 32 is provided with an inspection door 40 that can be opened and closed in the other space partitioned by the crosspiece member 35. In the inspection door 40, the side portion on the crosspiece 35 side is rotatably supported by the hinges 41 and 41, and the claws are engaged with the outer frame 34 by the rotation operation on the side portion facing the hinges 41 and 41. Opening / closing screws 42, 42 for switching between non-rotatable and rotatable inspection doors 40 are provided. An airtight member or the like may be arranged between the inspection door 40 and the outer frame 34 and the crosspiece member 35, but the airtightness of the inspection door 40 in the closed state is provided by the contact between them with almost no gap. Since the property is ensured, it is usually not necessary to arrange an airtight member.

As shown in FIG. 13, the fourth ceiling panel 33 has about half the size of the first ceiling panel 30, the second ceiling panel 31, and the third ceiling panel 32. A panel 44 made of a transparent, translucent or opaque resin or the like is fitted in a frame partitioned by outer frames 43, 43 ... In a state where airtightness is maintained. The fourth ceiling panel 33 is mainly used as a ceiling panel of the anterior chamber 13, and is used when the anterior chamber 13 is formed in a range narrower than the width of one side wall portion 3 of the clean booth 1. ing.

The first ceiling panel 30, the second ceiling panel 31, and the third ceiling panel 32 are arranged so that their longitudinal sides coincide with the direction in which the ceiling panel mounting frame 22 extends. In the embodiment shown in FIG. 8, the ceiling panels 30 to 32 are arranged in the longitudinal direction with respect to the three space portions partitioned by the beam members 21 and 21. The ceiling panels 30 to 32 can be arranged in different directions in the longitudinal direction, whereby the positions of the fan filter units 6 and 7 and the positions of the fan filter units 6 and 7 are particularly high in the first ceiling panel 30 and the third ceiling panel 32. The position of the inspection port can be set arbitrarily.

On the other hand, the fourth ceiling panel 33 is arranged with its short sides aligned with the direction in which the front room ceiling panel mounting frame 23 extends.

The ceiling panels 30 to 33 are merely placed on the ceiling panel mounting frames 22 and 23, and are not particularly fixed. As a result, the clean booth 1 can be easily assembled and disassembled, and the layout of the ceiling panel can be easily changed. On the other hand, the ceiling panels 30 to 33 may be fixed to the ceiling frame 20. As the fixing method, a screw fastening method using bolts or the like can be used.

The outer peripheral portion of the outer frame 34 on the short side of the first ceiling panel 30, the second ceiling panel 31, and the third ceiling panel 32 and the outer peripheral portion of the outer frame 34 on the longitudinal side of the fourth ceiling panel 33 have side walls. An airtight member 45 for maintaining airtightness with the portions 3 and 14 or an adjacent ceiling panel is provided. That is, among the outer frames of the ceiling panels 30 to 33, the airtight member 45 is provided on the outer peripheral portion of the outer frame that is not mounted on the ceiling panel mounting frames 22 and 23. In the portion where the outer frames 34 and 43 of the ceiling panels 30 to 33 are placed on the ceiling panel mounting frames 22 and 23, the outer frames 34 and 43 are in close contact with the ceiling panel mounting frames 22 and 23 due to the weight of the ceiling panels 30 to 33. Since the airtightness between them is maintained, it is not necessary to provide an airtight member between them, but in a portion where the ceiling panel mounting frames 22 and 23 are not provided or between adjacent ceiling panels. Since the airtightness cannot be maintained, it is desirable to provide the airtight member 45. In order to obtain a more reliable airtight structure, an airtight member may be arranged between the outer frames 34 and 43 of the ceiling panels 30 to 33 and the ceiling panel mounting frames 22 and 23.

Next, as the air supply fan filter unit 6, a general filter unit with a fan that passes through the filter and supplies the purified outdoor air to the room can be used, and the specific structure is as follows. As shown in FIG. 14, an air intake port 6a is formed on the upper surface and an air outlet 6b is formed on the lower surface, and a fan 6c and a main filter 6d are provided inside thereof. The outdoor air taken in from the air intake port 6a passes through the main filter 6d to be cleaned, and then is supplied into the booth from the air outlet 6b. As the main filter 6d, a HEPA filter, a ULPA filter, or the like can be used. Further, as shown in the illustrated example, a pre-filter 6e made of a saran net filter or the like can be installed in the air intake port 6a.

As the exhaust fan filter unit 7, a general filter unit with a fan that passes through the filter and exhausts the cleaned indoor air to the outside can be used, and the specific structure is shown in FIG. An air intake port 7a is formed on the lower surface and an air outlet 7b is formed on the upper surface, and a fan 7c and a main filter 7d are provided inside the air intake port 7a. The indoor air taken in from 7a, passed through the main filter 7d, and cleaned is exhausted to the outside from the air outlet 7b. As the main filter 7d, a HEPA filter, a ULPA filter, or the like can be used. Further, as shown in the illustrated example, a prefilter 7e made of a non-woven fabric or the like, a punching metal, or the like can be installed at the air outlet 7b to prevent contact or prevent falling dust.

The air supply fan filter unit 6 and the exhaust fan filter unit 7 have a resin on the upper part of the frame surrounded by the outer frame 34 of the first ceiling panel 30, the crosspiece member 35, and the fan filter unit mounting frames 38, 38. It is placed via an airtight member (not shown) made of rubber or rubber. Since it is placed via the airtight member, airtightness can be ensured without screwing, and the fan filter units 6 and 7 are less likely to be displaced. Further, since the fan filter units 6 and 7 are not screwed, the clean booth 1 can be easily assembled and disassembled, and the layout of the ceiling panel can be easily changed.

The air supply fan filter unit 6 and the exhaust fan filter unit 7 may be arranged one or more, respectively. That is, one or a plurality of fan filter units 6 and 7 can be arranged for the clean booth 1, respectively.

In the present clean booth 1 having the above configuration, the pressure in the room of the clean booth 1 can be switched between positive pressure and negative pressure. During positive pressure operation, + 5 Pa or more can be secured, and during negative pressure operation, -2.5 Pa or less can be secured in accordance with the air infection isolation room according to the CDC (Centers for Disease Control and Prevention) guidelines. In the positive pressure mode, the air outside the booth is supplied to the booth by the air supply fan filter unit 6, and the air volume is adjusted so that the inside of the booth becomes a positive pressure environment with a higher pressure than the outside of the booth. In the positive pressure mode, it can be used as a waiting place for doctors, nurses, etc. that suppresses the inflow of contaminated air, and stable clean air can be supplied to the booth, so it is an industry that requires a clean air environment. It can also be used as a clean booth. The cleanliness in the booth varies depending on the environment around the booth, flooring, etc., but it is possible to achieve a maximum of Class 5 (the number of fine particles of 0.5 μm or more in 1 m ² according to ISO 14644-1 is 3520 or less). can. On the other hand, in the negative pressure mode, the air inside the booth is exhausted to the outside of the booth by the exhaust fan filter unit 7, and the air volume is adjusted so that the inside of the booth becomes an environment of negative pressure whose pressure is lower than that outside the booth. In the negative pressure mode, by preventing the contaminated air from leaking to the outside in the booth, it can be used as a temporary hospital room when an infectious disease occurs, a temporary air infection isolation room, etc., as well as experiments such as regenerative medicine and drug adjustment. It can also be used for such purposes.

Further, in the clean booth 1, the arrangement of the air supply fan filter unit 6 and the exhaust fan filter unit 7 is different in each usage mode of the positive pressure mode and the negative pressure mode. That is, in the plan view of the clean booth 1, the positions where the air supply fan filter unit 6 and the exhaust fan filter unit 7 are arranged during the positive pressure mode operation, and the air supply fan filter unit 6 and the exhaust during the negative pressure mode operation. The positions where the fan filter units 7 are arranged are different.

During the positive pressure mode operation, the outdoor contaminated air is prevented from flowing into the booth from the doorway 5, and during the negative pressure mode operation, the contaminated air inside the booth is prevented from leaking to the outside from the doorway 5. Therefore, in this clean booth 1, in each of the positive pressure mode and the negative pressure mode, the air supply fan filter unit 6 and the exhaust fan filter unit 7 are prevented from flowing in or out of contaminated air in each mode. It is placed in the optimum position where it can be done. Therefore, in any mode of use of the positive pressure mode and the negative pressure mode, the inflow or outflow of contaminated air can be prevented, and the function as a clean booth can be more reliably enhanced.

More specifically, the relative positional relationship between the air supply fan filter unit 6 and the exhaust fan filter unit 7 in each operation mode will be described more specifically. As shown in FIG. 16, in the positive pressure mode, it is close to the doorway 5. The exhaust fan filter unit 7 is arranged on the side, the air supply fan filter unit 6 is arranged on the side far from the entrance / exit 5, and the air supply fan filter unit 6 is arranged on the side close to the entrance / exit 5 in the negative pressure mode. At the same time, it is preferable to arrange the exhaust fan filter unit 7 on the side far from the doorway 5.

In the positive pressure mode, it is assumed that the outdoor air flows in from the doorway 5 in consideration of the usage situation that prevents the outdoor air from flowing in from the doorway 5 by setting the indoor air pressure higher than the outdoor air pressure. As a result of performing the air flow simulation, as shown in FIG. 16A, the exhaust fan filter unit 7 is arranged on the side near the entrance / exit 5, and the air supply fan filter unit 6 is arranged on the side far from the entrance / exit 5. By arranging it, the contaminated air flowing in from the doorway 5 is minimized to diffuse into the room, and the inside of the booth can be kept in clean air.

On the other hand, in the negative pressure mode, there is a pollution source in the room far from the doorway 5 in consideration of the usage situation that the air inside the booth is prevented from flowing out from the doorway 5 by setting the air pressure in the room lower than the outside. As a result of performing an airflow simulation assuming the case of the above, as shown in FIG. 16B, the air supply fan filter unit 6 is arranged on the side near the doorway 5, and the exhaust fan is placed on the side far from the doorway 5. By arranging the filter unit 7, it is possible to prevent the contaminated air in the booth from flowing out of the booth from the entrance / exit 5.

To explain more specifically based on the above-mentioned airflow simulation, in the airflow simulation, first, as shown in FIG. 16, the ceiling of the clean booth 1 is viewed in a plan view in three vertical rows with the doorway 5 as a reference. × Divide into 12 squares in 4 rows. The square numbers 1 to 12 were added laterally from the side closer to the doorway 5. This one square has substantially the same size as the size of one side of the ceiling panels 30 to 32 partitioned by the crosspiece member 35. That is, the first ceiling panel 30, the second ceiling panel 31, and the third ceiling panel 32 have a size of two squares in the vertical direction.

In the airflow simulation, in the positive pressure mode, maintaining the cleanliness in the booth room is the highest priority, preventing the inflow of contaminated air from the outside, and creating an environment where the contaminated air generated in the room flows in 5 directions at the entrance and exit. In the negative pressure mode, the highest priority is to prevent the outflow of contaminated air generated in the booth room, and the goal is to create an environment in which the contaminated air in the room does not flow in the five entrances and exits.

The size of the clean booth 1 was 3 m in length × 3 m in width × 2.4 m in height. The size of the air outlet 6b of the air supply fan filter unit 6 was 600 mm × 600 mm and the flow rate was 600 CMH, and the size of the air intake port 7a of the exhaust fan filter unit 7 was 600 mm × 600 mm and the flow rate was 600 CMH. .. The air supply fan filter unit 6 and the exhaust fan filter unit 7 were installed in any of the above 12 squares.

The pollution source had a size of 300 mm × 300 mm and was installed on the floor. In the positive pressure mode, the entrance / exit 5 was assumed to be the pollution source, and the pollution source was placed at the position of the mass number 2. In the negative pressure mode, it was assumed that there was a pollution source in the back of the room (the side far from the doorway 5), and the cells were placed in either the mass numbers 11 or 12.

The method of airflow simulation is that in the positive pressure mode and the negative pressure mode, the pollution source is installed at a predetermined position in the room, and the positions where the air supply fan filter unit 6 and the exhaust fan filter unit 7 are installed are changed. The diffusion status of contaminated air was compared.

As a result, in the positive pressure mode, as shown in FIGS. 16A, 17 and 18, the air is exhausted to one of the three cells in the first row (mass numbers 1 to 3) adjacent to the doorway 5. In addition to arranging the fan filter unit 7 for air supply, arrange the fan filter unit 6 for air supply in any of the 6 squares on the 3rd and 4th rows (mass numbers 7 to 12) on the side far from the doorway 5. As a result, it was clarified that the contaminated air flowing in from the entrance / exit 5 is not diffused over a wide area in the room and is easily discharged to the outside by the exhaust fan filter unit 7. On the other hand, as shown in FIGS. 19 and 20, if the air supply fan filter unit 6 and the exhaust fan filter unit 7 are arranged at other positions, the air flowing in from the entrance / exit 5 is likely to diffuse over a wide area in the room. Become.

Next, in the negative pressure mode, as shown in FIGS. 16B, 21 and 22, any of the 6 cells in the 1st and 2nd rows (mass numbers 1 to 6) adjacent to the doorway 5 Crab air supply fan filter unit 6 is arranged, and any of the 5 squares in the 3rd and 4th rows (mass numbers 7 and 9 to 12) excluding the 2nd column on the side far from the doorway 5 It has been clarified that by arranging the exhaust fan filter unit 7 in the room, the air diffused from the pollution source arranged in the back of the room is less likely to diffuse in the direction of the doorway 5 and can be prevented from flowing out from the doorway 5 to the outside. .. On the other hand, as shown in FIGS. 23 and 24, if the air supply fan filter unit 6 and the exhaust fan filter unit 7 are arranged at other positions, the contaminated air is likely to diffuse toward the entrance / exit 5.

1 ... clean booth, 2 ... enclosure, 3 ... side wall, 4 ... ceiling, 5 ... doorway, 6 ... air supply fan filter unit, 7 ... exhaust fan filter unit, 8 ... support, 9 ... cross rail, 10 ... panel, 11 ... legs, 12 ... lower end airtight member, 13 ... front room, 14 ... front room side wall, 15 ... front room ceiling, 16 ... front room doorway, 20 ... ceiling frame, 21 ... Beam member, 22 ... Ceiling panel mounting frame, 23 ... Ceiling panel mounting frame for front room, 30 ... 1st ceiling panel, 31 ... 2nd ceiling panel, 32 ... 3rd ceiling panel, 33 ... 4th ceiling panel, 34 ... Outer frame, 35 ... rail member, 36 ... panel, 37 ... handle, 38 ... fan filter unit mounting frame, 39 ... panel, 40 ... inspection door, 41 ... hinge, 42 ... open / close screw, 43 ... outer frame, 44 ... panel, 45 ... airtight member

Claims (5)

A clean body having at least a side wall portion and a ceiling portion and having an entrance / exit in a part of the side wall portion, and a fan filter unit for air supply and a fan filter unit for exhaust air attached to the ceiling portion. It ’s a booth,
The pressure inside the space partitioned by the enclosure can be switched between positive pressure and negative pressure, and in each usage mode of positive pressure mode and negative pressure mode, the fan filter unit for air supply and the fan filter unit for exhaust are used. A clean booth featuring a different arrangement of fan filter units. In the positive pressure mode, the exhaust fan filter unit is arranged on the side close to the doorway, and the air supply fan filter unit is placed on the side far from the doorway.
The clean booth according to claim 1, wherein in the negative pressure mode, the fan filter unit for air supply is arranged on the side close to the doorway, and the fan filter unit for exhaust air is placed on the side far from the doorway. In a plan view, the ceiling is divided into 12 squares of 3 columns x 4 rows with reference to the doorway.
In the positive pressure mode, the fan filter unit for exhaust is arranged in any of the 3 squares in the 1st row adjacent to the doorway, and the 6 squares in the 3rd and 4th rows far from the doorway. Place the fan filter unit for air supply in one of them,
In the negative pressure mode, the fan filter unit for air supply is placed in any of the 6 squares in the first row and the second row adjacent to the doorway, and the second column on the side far from the doorway is excluded. The clean booth according to any one of claims 1 and 2, wherein the fan filter unit for exhaust is arranged in any of the 5 squares in the row and the fourth row. The clean booth according to any one of claims 1 to 3, wherein the fan filter unit for air supply and the fan filter unit for exhaust are each arranged one or more. The ceiling portion is configured by attaching a plurality of unitized ceiling panels to the ceiling frame.
The clean booth according to any one of claims 1 to 4, wherein the ceiling panel includes a first ceiling panel on which the fan filter unit can be installed and a second ceiling panel on which the fan filter unit cannot be installed.

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