Booth

Abstract

To provide a booth capable of holding an inner air quality without making room air in a room of a building flow backward from an entrance to the inside of the booth.SOLUTION: A booth 10 includes: a first booth 13; a first entrance 14 from which air A supplied to the first booth 13 flows out; a first air-supply system for generating air stream flowing in one direction from a first air-supply port to the first entrance 14; a second booth 19 in which air A flowing out from the first booth 13 flows; a second entrance 20 from which air A flowing to the second booth 19 flows out; first left and right panels 17, 18 positioned on both sides of the first entrance 14; and second left and right panels 25, 26 positioned on both sides of the second entrance 20. Air A supplied to the inside of the first booth 13 by the first air-supply system flows in one direction from the first entrance 14 to the second booth 19 while flowing in one direction from the first booth 13 to the first entrance 14, and then flows out from the second entrance 20 to the outside of the second booth 19.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a booth that is installed at a predetermined location in a room of a building. [Background technology]

[0002] A circulating safety cabinet that is formed from a safety cabinet body and an exhaust gas return unit and utilizes exhaust gas has been disclosed (see Patent Document 1). The safety cabinet body supplies clean intake air to the internal working space using an intake HEPA filter located at the bottom of the discharge plenum of the cabinet blower, sucks and circulates the air in the working space again by the cabinet blower, and exhausts a portion of the circulated air from the working space to the outside via an exhaust HEPA filter located at the top of the discharge plenum, thereby maintaining the working space at a negative pressure, and takes in external intake air from the front shutter opening to serve as barrier air.

[0003] The exhaust gas return unit is placed directly above the safety cabinet body, and is provided with an exhaust gas intake port at the rear of the bottom surface that takes in air exhausted from the safety cabinet body through the exhaust HEPA filter, and an exhaust gas outlet port at the front of the bottom surface that blows the air taken in from the exhaust gas intake port downward along the shutter on the front surface of the safety cabinet body. In this safety cabinet, the air descending along the shutter on the front surface of the safety cabinet body is sucked from the opening at the bottom end of the shutter into the working space maintained at negative pressure, and is recycled and utilized as all or part of the barrier air that prevents air in the working space from leaking from the opening.

[0004] The exhaust air return unit of the safety cabinet disclosed in Patent Document 2 has four support legs that support the exhaust air return unit by placing it on the ceiling board of the safety cabinet body, and partitions are installed along both support legs between the front and rear support legs on the left side and between the front and rear support legs on the right side (see FIG. 5 of Patent Document 1). In the exhaust air return unit, both partitions prevent air blown out from the exhaust outlet from leaking into the clean room. In this safety cabinet, the amount of barrier air sucked and introduced from the front side of the safety cabinet body into the working space of the safety cabinet body is the amount of air passing through the exhaust HEPA filter, and this amount of air becomes an airflow that descends from the exhaust outlet to the front side of the safety cabinet body, and is supplied to the seated working area. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2015-166646 A Summary of the Invention [Problem to be solved by the invention]

[0006] In a clean room equipped with the exhaust gas recirculation unit (safety cabinet body) disclosed in Patent Document 1, an air conditioner is installed, and an entrance door is installed on the wall of the clean room. While an operator can access the safety cabinet hands-free, the airflow inside the clean room is disturbed when the air conditioner is operated or the door is opened and closed. When the disturbed airflow acts on the opening area (entrance / exit) of the exhaust gas recirculation unit, the air inside the clean room flows (backflows) from the opening area of ​​the exhaust gas recirculation unit into the exhaust gas recirculation unit. When the air inside the clean room flows into the exhaust gas recirculation unit, contamination occurs in which the air inside the clean room mixes with the clean air inside the exhaust gas recirculation unit, and it may not be possible to maintain the clean state inside the exhaust gas recirculation unit (safety cabinet body).

[0007] An object of the present invention is to provide a booth housing work equipment, which can prevent a shortage of the design air volume of the supply air in the booth by supplying air A to the booth, and can maintain a clean interior without the indoor air of the building room flowing back into the booth from the entrance / exit of the booth. Another object of the present invention is to provide a booth which can prevent the indoor air of the building room from flowing into the booth even if a certain factor causes turbulence in the air flow inside the building room and the turbulence in the air flow inside the building room acts, thereby preventing contamination of the indoor air of the building room from mixing into the booth and maintaining a clean interior. [Means for solving the problem]

[0008] The premise of the present invention to solve the above problems is a booth that is installed in a predetermined location in a room of a building, is partitioned from the room by a ceiling, floor and wall panels, and is capable of accommodating work equipment therein.

[0009] The present invention based on the above premise is characterized in that the booth comprises a first booth having a predetermined work space, a first entrance / exit provided for a worker to enter and exit the first booth and through which the air A supplied into the first booth flows out, a first air supply means for generating an air current flowing in one direction from a first air supply port provided in the first booth toward the first entrance / exit, a second booth adjacent to the first booth and connected to the first entrance / exit and into which the air A flowing out from the first booth flows in, and a second entrance / exit provided for a worker to enter and exit the second booth and through which the air A flowing into the second booth flows out. the first panel located on both sides of the first entrance / exit, extending from the floor surface toward the ceiling surface and extending a predetermined length toward the inside of the second booth; and the second panel located on both sides of the second entrance / exit, extending from the floor surface toward the ceiling surface and extending a predetermined length toward the outside of the second booth, wherein in the booth, air A supplied to the inside of the first booth from the first air supply port by the first air supply means flows in one direction from the first booth toward the first entrance / exit, flows in one direction from the first entrance / exit toward the second booth, and then flows out to the outside of the second booth from the second entrance / exit.

[0010] As one example of the present invention, the booth includes an air intake port installed in the vicinity including the second entrance / exit for drawing in air A that has flowed out to the outside of the second booth, and a second air supply means for generating an air current that flows in one direction from the second booth toward the second entrance / exit by the air A supplied into the interior of the second booth, and in the booth, the air A supplied into the interior of the second booth by the second air supply means flows in one direction from the second booth toward the second entrance / exit, while flowing out to the outside of the second booth from the second entrance / exit.

[0011] In another example of the present invention, a booth includes a second air intake port installed in the second booth for supplying air A supplied by a second air intake means to the second booth, and an air flow path connecting the air intake port and the second air intake port, in the booth, the second air intake means supplies air A sucked in from the air intake port into the inside of the second booth, and air A supplied by the second air intake means from the second air intake port into the inside of the second booth flows in one direction from the second booth towards the second entrance / exit, and flows out to the outside of the second booth from the second entrance / exit.

[0012] In another example of the present invention, air A is clean air, and the cleanliness of the clean air is higher than that of the indoor air in a room of a building.

[0013] In another example of the present invention, the air flow path is a duct extending vertically from the floor side to the ceiling side, the air intake is installed below the duct extending on the floor side, and a second air intake port connected to the duct is installed above the second booth.

[0014] In another example of the present invention, the first panel is formed from a pair of a first right panel and a first left panel that face each other at a predetermined distance in the horizontal direction at a first entrance, and the second panel is formed from a pair of a second right panel and a second left panel that face each other at a predetermined distance in the horizontal direction at a second entrance, and the horizontal separation dimension between the second right panel and the second left panel is smaller than the horizontal separation dimension between the first right panel and the first left panel.

[0015] In another example of the present invention, the first right panel and the first left panel are located between the floor and the ceiling, and the vertical length dimension of the first right panel and the first left panel is the same as the vertical height dimension of the booth from the floor to the ceiling, and the second right panel and the second left panel are located between the floor and the ceiling, and the vertical length dimension of the second right panel and the second left panel is the same as the vertical height dimension of the booth from the floor to the ceiling.

[0016] As another example of the present invention, the first air supply means is an air supply system equipped with an air conditioner and a HEPA filter and supplying air A into the inside of the first booth from a first air supply port installed above the first booth, or a first fan filter unit installed above the first booth and supplying air A into the inside of the first booth from the first air supply port.

[0017] As another example of the present invention, the second air supply means is an air supply system equipped with a blower and a HEPA filter and supplying air A into the inside of the second booth from a second air supply port installed above the second booth, or a second fan filter unit installed above the second booth and supplying air A into the inside of the second booth from the second air supply port. Effect of the Invention

[0018] The booth according to the present invention comprises a first booth capable of accommodating various types of work equipment and having a predetermined work space; a first entrance / exit provided for entering and exiting the first booth, through which air A supplied into the interior of the booth flows out; a first air supply means for generating an air current flowing in one direction from a first air supply port provided in the first booth toward the first entrance / exit; a second booth adjacent to the first booth, connected to the first entrance / exit, through which the air A flowing out of the first booth flows in; and a second entrance / exit provided for entering and exiting the second booth by a worker, through which the air A flowing into the interior of the second booth flows out. Since air A supplied into the first booth from the first air supply port by the first air supply means flows in one direction from the first booth toward the first entrance / exit, flows in one direction from the first entrance / exit toward the second booth, and then flows out of the second booth from the second entrance / exit, it is possible to prevent a shortage of the design air volume of the supply air in the first and second booths and a decrease in the air speed at the first and second entrances, and it is possible to prevent the backflow of the indoor air of the building room from the first entrance / exit into the first booth, and to prevent the backflow of the indoor air of the building room from the second entrance / exit into the second booth. Since the indoor air of the building room does not flow back from the first entrance / exit into the first booth, and the indoor air of the building room does not flow back from the second entrance / exit into the second booth, the quality of the air inside the first and second booths can be maintained at the same state as that of air A when it was taken in from the first air supply port. Even if air turbulence occurs inside a room of the building in which the booth is installed due to a specified factor and the air turbulence generated inside the room acts on the booth, the booth can prevent indoor air from the room of the building from flowing into the second booth and can prevent indoor air from the room from flowing into the first booth, preventing contamination of the indoor air from the room with the air A inside the first and second booths and maintaining the cleanliness of the insides of the first and second booths.The booth comprises first panels located on both sides of the first entrance / exit, extending from the floor surface toward the top surface and extending a predetermined length toward the inside of the second booth, and second panels located on both sides of the second entrance / exit, extending from the floor surface toward the top surface and extending a predetermined length toward the outside of the second booth, and the first and second panels act as straightening plates to prevent turbulence of airflow, so that the first panel does not turbulence the airflow in the vicinity thereof, including the first entrance / exit, and the second panel does not turbulence the airflow in the vicinity thereof, including the second entrance / exit, and air A supplied into the inside of the first booth from the first air inlet can flow smoothly in one direction from the first booth toward the first entrance / exit, and the air A can flow smoothly in one direction from the first entrance / exit toward the second booth, and the air A can be smoothly discharged from the second entrance / exit to the outside of the second booth.

[0019] The booth includes an air intake port disposed near the second entrance and including the second entrance for taking in air A that has flowed out to the outside of the second booth, and a second air supply means for generating an air current that flows in one direction from the second booth toward the second entrance by the air A supplied into the inside of the second booth, in which the air A supplied into the inside of the second booth by the second air supply means flows in one direction from the second booth toward the second entrance and out while flowing out to the outside of the second booth from the second entrance and out. For example, when the air A sucked in from the air intake port is supplied into the inside of the second booth by the second air supply means, even if the air A that has flowed out to the outside of the second booth tries to flow into the second booth from the second entrance and out, The air A is drawn in through an air intake port installed in the vicinity including the second entrance / exit, and the air A drawn in through the air intake port is supplied to the second booth by the second air supply means, thereby generating an airflow of air A flowing in one direction from the second booth toward the second entrance / exit and from the second entrance / exit toward the outside of the second booth. This reliably prevents indoor air from the building's rooms from flowing into the first and second booths, and does not cause contamination of the indoor air from the rooms into the air A inside the first and second booths, and allows the air quality inside the first and second booths to be maintained at the same state as the air A when it was taken in through the first air intake port. Also, for example, when air A sucked in from the air intake port is exhausted into the room, even if air A flowing out to the outside of the second booth tries to flow into the second booth from the second entrance / exit, by exhausting that air A into the room, the air A flowing out to the outside of the second booth will not flow back into the second booth from the second entrance / exit. Furthermore, the second air supply means can generate an airflow of air A flowing in one direction from the second booth toward the second entrance / exit and from the second entrance / exit to the outside of the second booth. This reliably prevents the indoor air of the building's room from flowing into the first and second booths, and does not cause contamination of the indoor air of the room with the air A inside the first and second booths, and the air quality inside the first and second booths can be maintained at the same state as the air A when it was taken in from the first air intake port.

[0020] The booth includes a second air intake port provided in the second booth for supplying air A supplied by the second air supply means to the second booth, and an air flow path connecting the air intake port and the second air intake port, in which the second air supply means supplies air A sucked in from the air intake port into the inside of the second booth, and air A supplied into the inside of the second booth from the second air intake port by the second air supply means flows in one direction from the second booth towards the second entrance / exit while flowing out from the second entrance / exit to the outside of the second booth, and even if air A that has flowed out to the outside of the second booth tries to flow into the second booth from the second entrance / exit, the air A is guided to the air intake port provided in the vicinity thereof including the second entrance / exit. By drawing air in from the inlet, and the air A drawn in from the intake port being supplied to the second booth from the second intake port by the second intake means, an air current of air A can be generated that flows in one direction from the second booth toward the second entrance / exit and from the second entrance / exit toward the outside of the second booth, which reliably prevents indoor air from the building's rooms from flowing into the first and second booths, and does not cause contamination of the indoor air from the rooms by mixing with the air A inside the first and second booths, and allows the air quality inside the first and second booths to be maintained at the same state as the air A when it was taken in from the first intake port.

[0021] In a booth in which air A is clean air and the cleanliness of the clean air is higher than that of the indoor air of a room in a building, air A which is cleaner than the indoor air of the room is supplied to the first and second booths by first and second air supply means, and the air A generates an airflow from the first booth to the first entrance / exit, from the first entrance / exit to the second booth, and from the second booth to the second entrance / exit, thereby reliably maintaining a clean state inside the first and second booths.

[0022] In a booth in which the air flow path is a duct extending vertically from the floor side to the ceiling side, the air intake is installed below the duct extending to the floor side, and a second air supply port connected to the duct is installed above the second booth, even if air A flowing out to the outside of the second booth tries to flow into the second booth from the second entrance / exit, the air A is sucked in through the air intake installed below the duct, and the air A sucked in from the air intake is supplied to the upper part of the second booth from the second air supply port by the second air supply means, thereby generating an airflow of air A flowing in one direction from the second booth toward the second entrance / exit and from the second entrance / exit to the outside of the second booth, which prevents indoor air of the building from flowing into the first and second booths, and does not cause contamination in which the indoor air of the room is mixed with the air A inside the first and second booths, and reliably maintains the air quality inside the first and second booths at the same state as when the air A was taken in from the first air intake port.

[0023] In a booth in which the first panel is formed of a pair of a first right panel and a first left panel that face each other at a predetermined distance in the horizontal direction at the first entrance, the second panel is formed of a pair of a second right panel and a second left panel that face each other at a predetermined distance in the horizontal direction at the second entrance, and the horizontal distance between the second right panel and the second left panel is smaller than that between the first right panel and the first left panel, the first right panel and the first left panel act as baffles that prevent turbulence in the air current in the vicinity thereof including the first entrance, and the second right panel and the second left panel act as baffles that prevent turbulence in the vicinity thereof including the second entrance, the first right panel and the first left panel provide a baffle that prevents turbulence in the air current in the vicinity thereof including the second entrance. The second right panel and the second left panel do not disturb the air flow in the vicinity thereof, including the second entrance / exit, and the air A supplied into the inside of the first booth from the first air intake port can be made to flow smoothly in one direction from the first booth to the first entrance / exit, and the air A can be made to flow smoothly in one direction from the first entrance / exit to the second booth, and the air A and the air A supplied into the inside of the second booth from the second air intake port can be made to flow smoothly out to the outside of the second booth from the second entrance / exit, and the air quality inside the first and second booths can be maintained at the same state as the air A when it was taken in from the first air intake port. Since the lateral spacing between the second right panel and the second left panel of the booth is smaller than the lateral spacing between the first right panel and the first left panel, the flow rate of air A passing between the second right panel and the second left panel and flowing out to the outside of the second booth can be increased, and air A can be reliably flowed out to the outside of the second booth from the second entrance / exit.

[0024] In a booth in which the first right panel and the first left panel are located between the floor and the top surface, the vertical length dimension of the first right panel and the first left panel is the same as the vertical height dimension of the booth from the floor to the top surface, and the second right panel and the second left panel are located between the floor and the top surface, and the vertical length dimension of the second right panel and the second left panel is the same as the vertical height dimension of the booth from the floor to the top surface, the first right panel and the first left panel having the same length dimension as the vertical height dimension of the clean booth from the floor to the top surface act as baffles to prevent turbulence of airflow from the floor to the top surface in the vicinity thereof, including the first entrance, and the second right panel and the second left panel act as baffles to prevent turbulence of airflow from the floor to the top surface in the vicinity thereof, including the second entrance, The first right panel and the second left panel prevent the airflow from being disturbed from the floor surface to the ceiling surface in the vicinity, including the first entrance / exit, and the second right panel and the second left panel prevent the airflow from being disturbed from the floor surface to the ceiling surface in the vicinity, including the second entrance / exit, so that air A supplied into the inside of the first booth from the first air intake port can flow smoothly in one direction from the first booth toward the first entrance / exit, and that air A can be made to flow smoothly in one direction from the first entrance / exit toward the second booth, and that air A and the air A supplied into the inside of the second booth from the second air intake port can be made to flow smoothly out to the outside of the second booth from the second entrance / exit, and the air quality inside the first and second booths can be reliably maintained to the same state as air A when it was taken in from the first air intake port.

[0025] In a booth where the first air supply means is an air supply system equipped with an air conditioner and a HEPA filter and supplying air A into the inside of the first booth from a first air supply port installed above the first booth, or a first fan filter unit installed above the first booth and supplying air A into the inside of the first booth from the first air supply port, the air A is purified by the air supply system or the first fan filter unit and supplied to the inside of the first booth, and the air A flows in one direction from the first booth toward the first entrance / exit, and then flows in one direction from the first entrance / exit toward the second booth, and then flows out to the outside of the second booth from the second entrance / exit, so that it is possible to prevent backflow of indoor air from the first entrance / exit into the inside of the first booth and to prevent backflow of indoor air from the second entrance / exit into the inside of the second booth, and the insides of the first and second booths can be reliably maintained in a clean state.

[0026] In a booth where the second air supply means is an air supply system equipped with a blower and a HEPA filter and supplying air A into the inside of the second booth from a second air supply port installed above the second booth, or a second fan filter unit installed above the second booth and supplying air A into the inside of the second booth from the second air supply port, even if air A that has flowed out to the outside of the second booth attempts to flow into the second booth from the second entrance / exit, the air A is sucked in, the sucked in air A is purified by the air supply system or the second fan filter unit and supplied to the inside of the second booth, and the air A flows in one direction from the second booth toward the second entrance / exit while flowing out to the outside of the second booth from the second entrance / exit, so that it is possible to prevent backflow of indoor air from the second entrance / exit into the inside of the second booth and reliably maintain a clean state inside the first and second booths. [Brief description of the drawings]

[0027] [Figure 1] FIG. 2 is a front perspective view of an example of a clean booth. [Diagram 2] Top view of the clean booth including the building chamber. [Diagram 3] A cross-sectional view taken along line AA in FIG. 2. [Figure 4] FIG. 3 is a cross-sectional view taken along line BB in FIG. 2 . [Diagram 5] 3 is a cross-sectional view taken along line CC in FIG. 2 . [Figure 6] FIG. 2 is a top view showing the flow of room air and air A in the clean booth. [Figure 7] FIG. 4 is a side view similar to FIG. 3, showing the flow of room air and air A in the clean booth. [Figure 8] FIG. 5 is a front view similar to FIG. 4, showing the flow of room air and air A in the clean booth. [Figure 9] FIG. 6 is a front view similar to FIG. 5, showing the flow of room air and air A in the clean booth. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0028] With reference to the attached drawings, the details of the booth according to the present invention will be described below using a clean booth 10 as an example. FIG. 1 is a front perspective view of the clean booth 10 shown as an example, and FIG. 2 is a top view of the clean booth 10 including a room 12 of a building 11. FIG. 3 is a cross-sectional view taken along line AA in FIG. 2, and FIG. 4 is a cross-sectional view taken along line BB in FIG. 2. FIG. 5 is a cross-sectional view taken along line CC in FIG. 2. FIGS. 1 to 5 diagrammatically show an air supply system 16 (first air supply means), a right air supply system 23 (second air supply means), a left air supply system 24 (second air supply means), a safety cabinet 49, a first air supply port 15, a second right air supply port 21 (second air supply port), a second left air supply port 22 (second air supply port), and an air-conditioned air supply port 31 of an air-conditioning facility (air-conditioned air supply port 31 of an air conditioner). In FIG. 1, the up-down direction is indicated by an arrow X, the front-rear direction is indicated by an arrow Y, and the lateral direction is indicated by an arrow Z.

[0029] The clean booth 10 (booth) is installed in a predetermined location in a room 12 of a building 11 such as a research building, laboratory building, medical building, manufacturing plant, etc., is partitioned off from the room 12, and can accommodate various experimental equipment (work equipment) inside (inside) the booth, and is used for various experiments, research, development, cultivation, etc. The interiors (first and second booths) of the clean booth 10 are maintained at a slightly positive pressure. The clean booth 10 has a first booth 13 (main work booth), a first entrance / exit 14, a first air inlet 15, an air supply system 16 (first air supply means), a first right panel 17 (first panel) and a first left panel 18 (first panel), a second booth 19 (auxiliary work booth), a second entrance / exit 20, a second right air inlet 21 (second air inlet) and a second left air inlet 22 (second air inlet), a right air supply system 23 (second air supply means) and a left air supply system 24 (second air supply means), a second right panel 25 (second panel) and a second left panel 26 (second panel), a right duct 27 (air flow path) and a left duct 28 (air flow path), a right air intake 29 (air intake) and a left air intake 30 (air intake), and a controller (not shown).

[0030] The building 11 is equipped with an air conditioning system (not shown) that supplies conditioned air A (e.g., air quality with a predetermined temperature, a predetermined humidity, a predetermined cleanliness, and containing a predetermined type of gas) to the room (inside) of the room 12. A conditioned air inlet 31 (outlet) that supplies conditioned air generated by the air conditioning system (e.g., an air conditioner) to the inside (inside) of the building 11 is installed on the ceiling (ceiling surface 66) outside (common area) of the clean booth 10 in the room 12 of the building 11. A predetermined volume of conditioned air is supplied from the conditioned air inlet 31 toward the inside of the room 12 of the building 11, and the inside of the room 12 of the building 11 is maintained at a set temperature and humidity. The cleanliness of the inside of the room 12 of the building 11 is lower than that of the inside of the clean booth 10.

[0031] The clean booth 10 is made up of a plurality of ceiling panels 32 installed inside a room 12 of a building 11, a plurality of side wall panels 34 installed between a floor surface 33 of the building 11 and the ceiling panel 32, a plurality of first right front wall panels 35 and a plurality of first left front wall panels 36 installed between the floor surface 33 and the ceiling panel 32, and a plurality of second right front wall panels 37 and a plurality of second left front wall panels 38 installed between the floor surface 33 and the ceiling panel 32. The ceiling panel 32 is made up of an aluminum panel or a steel panel having a rectangular planar shape. The ceiling panel 32 is made up of a plurality of side panels 39 and a plurality of top panels 40.

[0032] In the ceiling panel 32, the side panels 39 are airtightly connected in the horizontal and front-to-back directions to form a ceiling enclosure, and the top panels 40 are airtightly connected in the horizontal and front-to-back directions to form a ceiling portion. In the ceiling panel 32, the upper edges of the side panels 39 are airtightly connected to the ceiling surface 66 of the building 11, and the outer periphery of the ceiling portion made of the top panel 40 is airtightly connected to the lower edges of the side panels 39. A ceiling space 41 surrounded by the side panels 39 is formed between the ceiling surface 66 of the building 11 and the top panels 40 (ceiling).

[0033] A ceiling lighting fixture (LED) is installed on the top panel 40. The ceiling panels 32 (side panels 39 and top panel 40) are detachable inside the room 12 of the structure 11, and multiple panels can be easily and quickly installed inside the structure 11 according to a predetermined manual (procedure). They can also be easily and quickly removed from inside the structure 11 and can be easily disassembled into multiple panels 39, 40.

[0034] The side wall panel 34, the first right front wall panel 35, the first left front wall panel 36, the second right front wall panel 37, and the second left front wall panel 38 are made of an aluminum frame or a steel frame and a transparent plastic plate (acrylic board, polycarbonate board, PVC board, etc.) or a transparent glass plate fitted into the aluminum frame or the steel frame, and are formed into a rectangular planar shape. The side wall panels 34 are airtightly connected in the lateral direction to form a back wall 42 of the clean booth 10, and are airtightly connected in the front-rear direction to form both side walls 43 of the clean booth 10 that are spaced apart and opposed to each other in the lateral direction.

[0035] The upper edges of these side wall panels 34 are airtightly connected to the outer periphery of the ceiling portion (top panel 40), and their lower edges are airtightly connected to the floor surface 33 of the structure 11. The side wall panels 34 are detachable inside the room 12 of the structure 11, and a plurality of these can be easily and quickly attached to the inside of the structure 11 according to a prescribed manual (procedure), and can be easily and quickly removed from the inside of the structure 11 and can be easily disassembled into a plurality of side wall panels 34.

[0036] The first right front wall panel 35 is spaced forward in the front-rear direction from the rear wall 42, extends laterally inward from the inside of the side wall panel 39, and extends vertically from the floor surface 33 of the room 12 to the top panel 40 (the top surface of the room 12). The vertical length dimension of the first right front wall panel 35 is the same as the vertical height dimension of the clean booth 10 from the floor surface 33 to the top panel 40 (the top surface of the room 12).

[0037] The first right front wall panel 35 has one side edge extending in the vertical direction airtightly connected to the side wall panel 39, an upper edge extending in the horizontal direction airtightly connected to the top panel 40, and a lower edge extending in the horizontal direction airtightly connected to the floor surface 33. The first right front wall panel 35 is connected perpendicularly to the side wall panel 39 to form a first right front wall 44.

[0038] The first left front wall panel 36 is spaced forward in the front-rear direction from the rear wall 42, extends laterally inward from the inside of the side wall panel 39, and extends vertically from the floor surface 33 of the room 12 to the top panel 40 (the top surface of the room 12). The vertical length dimension of the first left front wall panel 36 is the same as the vertical height dimension of the clean booth 10 from the floor surface 33 to the top panel 40 (the top surface of the room 12).

[0039] The first left front wall panel 36 has the other side edge extending in the vertical direction airtightly connected to the side wall panel 39, the upper end edge extending in the horizontal direction airtightly connected to the top panel 40, and the lower end edge extending in the horizontal direction airtightly connected to the floor surface 33. The first left front wall panel 36 is connected perpendicularly to the side wall panel 39 to form a first left front wall 45. The other side edge of the first right front wall panel 35 (the other side edge of the first right front wall 44) and one side edge of the first left front wall panel 36 (one side edge of the first left front wall 45) face each other in the horizontal direction, and a first entrance 14 of a predetermined area is opened between the other side edge of the first right front wall panel 35 and one side edge of the first left front wall panel 36.

[0040] The first right front wall panel 35 and the first left front wall panel 36 are detachable inside the room 12 of the building 11, and multiple panels of them can be easily and quickly attached to the inside of the building 11 in accordance with a prescribed manual (procedure), and can be easily and quickly removed from the inside of the building 11, and can be easily disassembled into multiple first right front wall panels 35 and first left front wall panels 36.

[0041] The second right front wall panel 37 is spaced forward in the front-rear direction from the first right front wall 44 (first right front wall panel 35), extends laterally inward from the inside of the side wall panel 39, and extends vertically from the floor surface 33 of the room 12 to the top panel 40 (the top surface of the room 12). The vertical length dimension of the second right front wall panel 37 is the same as the vertical height dimension of the clean booth 10 from the floor surface 33 to the top panel 40 (the top surface of the room 12).

[0042] The second right front wall panel 37 has one side edge extending in the vertical direction airtightly connected to the side wall panel 39, an upper edge extending in the horizontal direction airtightly connected to the top panel 40, and a lower edge extending in the horizontal direction airtightly connected to the floor surface 33. The second right front wall panel 37 is connected perpendicular to the side wall panel 39 to form a second right front wall 46.

[0043] The second left front wall panel 38 is spaced forward in the front-rear direction from the first left front wall 45 (first left front wall panel 36), extends laterally inward from the inside of the side wall panel 39, and extends vertically from the floor surface 33 of the room 12 to the top panel 40 (the top surface of the room 12). The vertical length dimension of the second left front wall panel 38 is the same as the vertical height dimension of the clean booth 10 from the floor surface 33 to the top panel 40 (the top surface of the room 12).

[0044] The second left front wall panel 38 has the other side edge extending in the vertical direction airtightly connected to the side wall panel 39, the upper end edge extending in the horizontal direction airtightly connected to the top panel 40, and the lower end edge extending in the horizontal direction airtightly connected to the floor surface 33. The second left front wall panel 38 is connected perpendicularly to the side wall panel 39 to form a second left front wall 47. The other side edge of the second right front wall panel 37 (the other side edge of the second right front wall 46) and one side edge of the second left front wall panel 38 (one side edge of the second left front wall 47) face each other in the horizontal direction, and a second entrance 20 of a predetermined area is opened between the other side edge of the second right front wall panel 37 and one side edge of the second left front wall panel 38.

[0045] The second right front wall panel 37 and the second left front wall panel 38 are detachable inside the room 12 of the building 11, and multiple panels of them can be easily and quickly attached to the inside of the building 11 in accordance with a prescribed manual (procedure), and can be easily and quickly removed from the inside of the building 11, and can be easily disassembled into multiple second right front wall panels 37 and second left front wall panels 38.

[0046] In the clean booth 10, a first booth 13 (main work booth) having a predetermined volume and a predetermined floor area is formed, surrounded by a ceiling panel 40, a side wall panel 39 (both side walls 43, a back wall 42), a first right front wall panel 35 (first right front wall 44), and a first left front wall panel 36 (first left front wall 45). In the clean booth 10, a second booth 19 (auxiliary work booth) having a predetermined volume and a predetermined floor area is formed, surrounded by a ceiling panel 40, a side wall panel 39 (both side walls 43), a first right front wall panel 35 (first right front wall 44), a first left front wall panel 36 (first left front wall 45), a second right front wall panel 37 (second right front wall 46), and a second left front wall panel 38 (second left front wall 47).

[0047] The first booth 13 (main work booth) has a work space 48 of a predetermined volume, which can accommodate various experimental equipment (work equipment), where workers carry out various experiments, research, development, cultivation, etc. A safety cabinet 49 is accommodated in the work space 48 of the illustrated first booth 13. In addition to the safety cabinet 49, the first booth 13 can also accommodate a clean bench, a glove box, an isolator, and a draft chamber, and can also accommodate various experimental equipment such as a cell culture device, a centrifuge, and a freezer, as well as desks, shelves, computers (servers), etc.

[0048] The safety cabinet 49 comprises a working chamber and a stand on which the working chamber is placed. An air inlet opening and an air flow path are formed in the safety cabinet 49, and a blower (air supply and exhaust fan) and a HEPA filter are installed. The air inlet opening opens below the working chamber. The air flow path is connected to the air inlet opening, and air that has flowed in from the air inlet opening flows through it. An exhaust duct 64 is connected to the air flow path that extends directly above the working chamber. In the clean booth 10, the blower and the exhaust duct 64 form the exhaust means.

[0049] The exhaust duct 64 extends from the ceiling of the safety cabinet 49 and into the inside of the first booth 13. An exhaust port 65 is connected to the tip of the exhaust duct 64 that extends into the inside of the first booth 13. The air that has passed through the safety cabinet 49 is exhausted from the exhaust port 65 into the inside of the first booth 13.

[0050] The blower of the safety cabinet 49 is installed in an air flow path extending directly above the working chamber, and causes the air that has flowed into the air flow path to flow from above to below the working chamber. The HEPA filter of the safety cabinet 49 is installed directly above the working chamber (top panel) and above the air flow path extending directly above the working chamber. When the blower is started in the safety cabinet 49, as shown by the arrow L3 in FIG. 7, it takes in air from inside the first booth 13, filters a part of the air with the HEPA filter, and supplies clean air to the working chamber, creating a clean air space in the working chamber. Furthermore, it exhausts clean exhaust air (clean air) into the inside of the first booth 13 while filtering the exhaust air with the HEPA filter.

[0051] There is no particular limit to the volume and floor area of ​​the first booth 13, and the volume and floor area are determined depending on the type of work to be performed in the first booth 13, the size of the experimental equipment to be housed, the number of pieces of experimental equipment, etc. The first entrance 14 is provided for entering and exiting the first booth 13 from the second booth 19, and opens between the first right front wall 44 and the first left front wall 45 formed by the first right front wall panel 35 and the first left front wall panel 36 (at the center of the first booth 13). The first entrance 14 has a planar shape of a rectangle that is long in the vertical direction, and has an opening area that allows workers to pass through (enter and exit). From the first entrance 14, air A inside the first booth 13 flows out toward the second booth 19.

[0052] The first air intake 15 is installed in the ceiling panel 32 (top panel 40) in approximately the center of the first booth 13. The first air intake 15 has a rectangular planar shape and has a plurality of lattice-like openings through which air A (e.g., clean air) is supplied (discharged) into the first booth 13. The air supply system 16 (first air supply means) includes an air conditioner 50 and a HEPA filter 51, and supplies a predetermined volume of air A (clean air) from the first air intake 15 to the first booth 13.

[0053] The air conditioner 50 is installed outside the clean booth 10 (first booth 13) and inside the room 12 of the building 11. The air conditioner 50 is connected to the first booth 13 via a duct 52. The control unit of the air conditioner 50 is connected to a controller via a signal line (wired or wireless), and the start / stop and output of the air conditioner 50 are controlled by the controller. The HEPA filter 51 is detachably installed inside a filter housing box 53 that is directly above the first air intake 15 and connected to the duct 52. The duct 52 enters the ceiling space 41 in the ceiling part from inside the room 12 of the building 11 and is connected to the filter housing box 53 (first air intake 15).

[0054] The air conditioner 50 takes in indoor (outdoor) air from the room 12 of the building 11, converts the indoor air into conditioned air, and supplies the conditioned air A at a specified supply volume toward the first booth 13. The air A created by the air conditioner 50 passes through the duct 52 and reaches the HEPA filter 51, and as it flows through the HEPA filter 51, impurities contained therein (dust, germs, viruses, etc.) are removed (filtered) by the HEPA filter 51, turning the air A into clean air.

[0055] Air A (clean air), from which impurities have been removed, is supplied from the duct 52 through the first air supply port 14 to the ceiling toward the floor surface 33 inside the first booth 13. By supplying air A from the air conditioner 50, the air supply system 16 (first air supply means) generates an airflow made from the air A flowing in one direction (front-to-back direction) from the first booth 13 toward the first entrance / exit 14 while maintaining the internal air pressure of the first booth 13 at a slightly positive pressure.

[0056] It should be noted that a fan filter unit (first air supply means) can be used instead of the air supply system 16. The fan filter unit is installed in the ceiling space 41 in the ceiling part of the first booth 13. The fan filter unit has an air supply fan, a HEPA filter, and an air intake located in the ceiling space 41. The control section of the fan filter unit is connected to the controller via a signal line, and the start / stop and output of the fan filter unit are controlled by the controller. The fan filter unit takes in indoor (outdoor) air of the room 12 of the building 11 from the air intake, removes impurities (dust, germs, viruses, etc.) contained in the indoor air using the HEPA filter to turn it into clean air, and supplies the cleaned air A (clean air) from the first air supply port 15 toward the floor surface inside the first booth 13. The fan filter unit supplies a predetermined amount of air A, thereby generating an airflow made from the air A flowing in one direction (front-to-back) from the first booth 13 toward the first entrance / exit 14 while maintaining the internal air pressure of the first booth 13 at a slightly positive pressure.

[0057] The first right panel 17 (first panel) is located on one side of the first entrance 14, is connected to the other side edge of the first right front wall panel 35 that forms the first entrance 14 of the first booth 13, and extends forward in the front-rear direction from the other side edge of the first right front wall panel 35, and also extends vertically from the floor surface 33 of the room 12 toward the top panel 40 (the top surface of the room 12). The first right panel 17 extends a predetermined length from the first entrance 14 toward the inside of the second booth 19. The vertical length dimension of the first right panel 17 is the same as the vertical height dimension of the clean booth 10 from the floor surface 33 to the top panel 40 (the top surface of the room 12). The first right panel 17 has an upper edge extending in the front-to-rear direction that is airtightly connected to the top panel 40, a lower edge extending in the front-to-rear direction that is airtightly connected to the floor surface 33, and a rear edge extending in the vertical direction that is airtightly connected to the other side edge of the first right front wall panel 35.

[0058] The first left panel 18 (first panel) is located on the other side of the first entrance 14, is connected to one side edge of the first left front wall panel 36 that forms the first entrance 14 of the first booth 13, and extends forward in the front-rear direction from one side edge of the first left front wall panel 36, and also extends vertically from the floor surface 33 of the room 12 toward the top panel 40 (the top surface of the room 12). The first left panel 18 extends a predetermined length from the first entrance 14 toward the inside of the second booth 19. The vertical length dimension of the first left panel 18 is the same as the vertical height dimension of the clean booth 10 from the floor surface 33 to the top panel 40 (the top surface of the room 12). The first left panel 18 has an upper edge extending in the front-to-rear direction that is airtightly connected to the top panel 40, a lower edge extending in the front-to-rear direction that is airtightly connected to the floor surface 33, and a rear edge extending in the vertical direction that is airtightly connected to the other side edge of the first left front wall panel 36.

[0059] The first right panel 17 and the first left panel 18 function as airflow straightening plates to prevent turbulence in the air, and straighten turbulence in the air in the vicinity thereof, including the first entrance 14. The first right panel 17 and the first left panel 18 are made from an aluminum or steel frame and a transparent plastic plate (acrylic board, polycarbonate board, PVC board, etc.) or a transparent glass plate fitted into the aluminum or steel frame, and are formed into a rectangular planar shape.

[0060] The first right panel 17 and the first left panel 18 are removable inside the room 12 of the structure 11, and multiple panels of them can be easily and quickly attached to the inside of the structure 11 in accordance with a prescribed manual (procedure), and can be easily and quickly removed from the inside of the structure 11, and can be easily disassembled into multiple first right panels 17 and first left panels 18.

[0061] The second booth 19 (auxiliary work booth) has an auxiliary work space of a specified volume, and can perform various auxiliary tasks. The auxiliary tasks include various tasks such as changing into work clothes, sorting experimental samples, checking results, and checking work procedures. The interior of the second booth 19 can accommodate a desk, shelf, keyboard, mouse, etc. There are no particular limitations on the volume and floor area of ​​the second booth 19, and the volume and floor area are determined depending on the type of work performed in the second booth 19, the number of people accommodated, etc.

[0062] The second entrance 20 is provided for entering and exiting the second booth 19 from the outside of the second booth 19 (inside the room 12), and opens between the second right front wall 46 and the second left front wall 47 formed by the second right front wall panel 37 and the second left front wall panel 38 (at the center of the second booth 19). The second entrance 20 has a vertically long rectangular shape in plan view, and has an opening area large enough for workers to pass through (enter and exit). From the second entrance 20, air A inside the second booth 19 flows out toward the outside of the second booth 19 (inside the room 12).

[0063] The second right air supply port 21 (second air supply port) is installed on the ceiling panel 32 (top panel 40) on the right side of the second booth 19. The second right air supply port 21 has a rectangular shape in plan view and has multiple lattice-shaped openings to send (supply) air A (clean air) or a mixed air (clean air) of air near the outside of the second booth 19 and air A (described later) from those openings into the interior of the second booth 19. The second left air supply port 22 (second air supply port) is installed on the ceiling panel 32 (top panel 40) on the left side of the second booth 19. The second left air supply port 22 has a rectangular shape in plan view and has multiple lattice-shaped openings to send (supply) air A (clean air) or a mixed air (clean air) from those openings into the interior of the second booth 19.

[0064] The right air supply system 23 (second air supply means) includes a blower 54, a HEPA filter 55, and a right connecting duct 56, and supplies a predetermined volume of air A (clean air) or mixed air (clean air) from the second right air supply port 21 to the second booth 19. The right connecting duct 56 is located in the ceiling space 41 of the ceiling portion, and is connected to the right duct 27 and to a filter housing box 57 (second left air supply port 21) installed directly above the second right air supply port 21. The blower 54 (air supply pump) is installed in the right connecting duct 56, and its control unit is connected to the controller via a signal line. The start / stop and output of the blower 54 are controlled by the controller. The HEPA filter 55 is detachably installed inside the filter housing box 57 connected to the right connecting duct 56.

[0065] The right air supply system 23 (second air supply means) passes air A or mixed air near the second entrance / exit 20 that has flowed out to the outside of the second booth 19 through a HEPA filter 55, thereby removing (filtering) impurities (dust, germs, viruses, etc.) contained in the air A or mixed air with the HEPA filter 55, and converts the air A or mixed air into clean air A (clean air) or mixed air (clean air). The right air supply system 23 supplies a predetermined supply volume of clean air A or mixed air from the second right air supply port 21 toward the second booth 19 by the blower 54.

[0066] The air A (clean air) or mixed air (clean air) from which impurities have been removed by the HEPA filter 55 is supplied from the ceiling through the second right air supply port 21 toward the floor surface 33 inside the second booth 19. The right air supply system 23 (second air supply means) supplies the air A (clean air) or mixed air (clean air) near the second entrance / exit 20 that has flowed out to the outside of the second booth 19 toward the floor surface 33 from above the second booth 19, thereby generating an airflow made of the air A or mixed air flowing in one direction (front-to-back direction) from the second booth 19 toward the second entrance / exit 20 while maintaining the internal air pressure of the second booth 19 at a slightly positive pressure.

[0067] The left air supply system 24 (second air supply means) includes a blower 58, a HEPA filter 59, and a left connecting duct 60, and supplies a predetermined volume of air A (clean air) or mixed air (clean air) from the second left air supply port 22 to the second booth 19. The left connecting duct 60 is located in the ceiling space 41 of the ceiling portion, and is connected to the left duct 28 and to a filter housing box 61 (second left air supply port 22) installed directly above the second left air supply port 22. The blower 58 (air supply pump) is installed in the left connecting duct 60, and its control unit is connected to the controller via a signal line. The start / stop and output of the blower 58 are controlled by the controller. The HEPA filter 59 is detachably installed inside the filter housing box 61 connected to the left connecting duct 60.

[0068] The left air supply system 24 (second air supply means) passes the air A or mixed air near the second entrance / exit 20 that has flowed out to the outside of the second booth 19 through a HEPA filter 59, thereby removing (filtering) impurities (dust, germs, viruses, etc.) contained in the air A or mixed air with the HEPA filter 59, and converts the air A or mixed air into clean air A (clean air) or mixed air (clean air). The left air supply system 24 supplies a predetermined supply volume of clean air A or mixed air from the second left air supply port 22 toward the second booth 19 by the blower 58.

[0069] The air A (clean air) or mixed air (clean air) from which impurities have been removed by the HEPA filter 59 is supplied from the ceiling through the second left air supply port 22 toward the floor surface 33 inside the second booth 19. The left air supply system 24 (second air supply means) supplies the air A (clean air) or mixed air (clean air) near the second entrance / exit 20 that has flowed out to the outside of the second booth 19 toward the floor surface 33 from above the second booth 19, thereby generating an airflow made of the air A or mixed air flowing in one direction (front-to-back direction) from the second booth 19 toward the second entrance / exit 20 while maintaining the internal air pressure of the second booth 19 at a slightly positive pressure.

[0070] Incidentally, a right fan filter unit (second air supply means) can be used instead of the right air supply system 23 (second air supply means), and a left fan filter unit (second air supply means) can be used instead of the left air supply system 24 (second air supply means). The right fan filter unit is installed in a ceiling space 41 in the ceiling part to the right of the second booth 19, and the left fan filter unit is installed in a ceiling space 41 in the ceiling part to the left of the second booth 19.

[0071] The right fan filter unit and the left fan filter unit have an intake fan and a HEPA filter, and a connecting duct located in the ceiling space 41. The right fan filter unit and the left fan filter unit have their control units connected to a controller via signal lines, and their start / stop and output are controlled by the controller. The right fan filter unit and the left fan filter unit take in air A or mixed air near the second entrance / exit 20 that has passed through the left and right ducts 27, 28 from the connecting duct, remove impurities (dust, germs, viruses, etc.) contained in the air A or mixed air using the HEPA filter to convert it into purified air A (clean air) or mixed air (clean air), and supply the air A (clean air) or mixed air (clean air) from the second right air intake port 21 and the second left air intake port 22 toward the floor surface 33 inside the second booth 19. The right fan filter unit and the left fan filter unit supply a predetermined amount of air A or mixed air to the second booth 19, thereby maintaining the internal air pressure of the second booth 19 at a slightly positive pressure and generating an airflow made from the air A or mixed air flowing in one direction (front-to-back) from the second booth 19 toward the second entrance / exit 20.

[0072] The second right panel 25 (second panel) is located on one side of the second entrance 20, is connected to the other side edge of the second right front wall panel 37 that forms the second entrance 20 of the second booth 19, and extends forward in the front-rear direction from the other side edge of the second right front wall panel 37, and also extends in the vertical direction from the floor surface 33 of the room 12 toward the top panel 40 (the top surface of the room 12). The second right panel 25 extends a predetermined length from the second entrance 20 toward the outside of the second booth 19. The vertical length dimension of the second right panel 25 is the same as the vertical height dimension of the clean booth 10 from the floor surface 33 to the top panel 40 (the top surface of the room 12). The second right panel 25 has an upper edge extending in the front-to-rear direction that is airtightly connected to the top panel 40, a lower edge extending in the front-to-rear direction that is airtightly connected to the floor surface 33, and a rear edge extending in the vertical direction that is airtightly connected to the other side edge of the second right front wall panel 37.

[0073] The second left panel 26 (second panel) is located on the other side of the second entrance 20, is connected to one side edge of the second left front wall panel 38 that forms the second entrance 20 of the second booth 19, and extends forward in the front-rear direction from one side edge of the second left front wall panel 38, and also extends in the vertical direction from the floor surface 33 of the room 12 toward the top panel 40 (the top surface of the room 12). The second left panel 26 extends a predetermined length from the second entrance 20 toward the outside of the second booth 19. The vertical length dimension of the second left panel 26 is the same as the vertical height dimension of the clean booth 10 from the floor surface 33 to the top panel 40 (the top surface of the room 12). The second left panel 26 has an upper edge extending in the front-to-rear direction airtightly connected to the top panel 40, a lower edge extending in the front-to-rear direction airtightly connected to the floor surface 33, and a rear edge extending in the vertical direction airtightly connected to the other side edge of the second left front wall panel 38.

[0074] The second right panel 25 and the second left panel 26 function as straightening plates to prevent turbulence in the air current, and straighten the turbulence in the air current in the vicinity including the second entrance 20. The second right panel 25 and the second left panel 26 are made from an aluminum frame or a steel frame and a transparent plastic plate (acrylic board, polycarbonate board, PVC board, etc.) or a transparent glass plate fitted into the aluminum frame or the steel frame, and are formed into a rectangular planar shape.

[0075] The second right panel 25 and the second left panel 26 are removable inside the room 12 of the building 11, and multiple panels of them can be easily and quickly attached to the inside of the building 11 in accordance with a prescribed manual (procedure), and can be easily and quickly removed from the inside of the building 11, and can be easily disassembled into multiple second right panels 25 and second left panels 26.

[0076] The lateral distance between one side edge of the second right panel 25 and the other side edge of the second left panel 26 (the lateral opening dimension of the second entrance 20) is smaller than the lateral distance between one side edge of the first right panel 17 and the other side edge of the first left panel 18 (the lateral opening dimension of the first entrance 14). Therefore, the opening area of ​​the second entrance 20 is smaller than the opening area of ​​the first entrance 14, and the flow velocity of air A or mixed air flowing through the second entrance 20 is faster than the flow velocity of air A or mixed air flowing through the first entrance 14.

[0077] The right duct 27 (air flow path) is made up of the right side wall panel 34 extending forward in the front-rear direction from the second booth 19, the second right front wall panel 37 extending laterally, the second right panel 25 extending in the front-rear direction, and the right duct panel 62 extending laterally. The right duct 27 extends vertically from the floor surface 33 of the room 12 toward the top panel 40 (the top surface of the room 12). The right duct 27 has a rectangular cross-sectional shape and has a flow space extending vertically surrounded by the panels 25, 34, 37, 62. The upper part of the right duct 27 is located in the ceiling space 41 of the ceiling part, and is airtightly connected to the right connecting duct 56. Air A or mixed air near the second entrance 20 that flows out to the outside of the second booth 19 flows from the bottom to the top of the flow space in the right duct 27.

[0078] The right duct panel 62 is disposed at a distance forward in the front-rear direction from the second right front wall panel 37, and extends laterally between the right side wall panel 34 and the second right panel 25, and also extends vertically from the floor surface 33 of the room 12 to the top panel 40 (the top surface of the room 12). The vertical length dimension of the right duct panel 62 is the same as the vertical height dimension of the clean booth 10 from the floor surface 33 to the top panel 40 (the top surface of the room 12). Both side edges of the right duct panel 62 are airtightly connected to the front end edge of the right side wall panel 34 and the front end edge of the second right panel 25, an upper end edge extending in the horizontal direction is airtightly connected to the top panel 40, and a lower end edge extending in the horizontal direction is airtightly connected to the floor surface 33.

[0079] The left duct 28 (air flow path) is made up of the left side wall panel 34 extending forward from the second booth 19 in the front-rear direction, the second left front wall panel 38 extending laterally, the second left panel 26 extending in the front-rear direction, and the left duct panel 63 extending laterally. The left duct 28 extends vertically from the floor surface 33 of the room 12 toward the top panel 40 (the top surface of the room 12). The left duct 28 has a rectangular cross-sectional shape and has a flow space extending vertically surrounded by the panels 26, 34, 38, and 63. The upper part of the left duct 28 is located in the ceiling space 41 of the ceiling part, and is airtightly connected to the left connecting duct 60. The air A or mixed air near the second entrance 20 that flows out to the outside of the second booth 19 flows from the bottom to the top of the flow space in the left duct 28.

[0080] The left duct panel 63 is disposed at a distance forward in the front-rear direction from the second left front wall panel 38, and extends laterally between the left side wall panel 34 and the second left panel 26, and also extends vertically from the floor surface 33 of the room 12 to the top panel 40 (the top surface of the room 12). The vertical length dimension of the left duct panel 63 is the same as the vertical height dimension of the clean booth 10 from the floor surface 33 to the top panel 40 (the top surface of the room 12). Both side edges of the left duct panel 63 are airtightly connected to the front end edge of the left side wall panel 34 and the front end edge of the second left panel 26, an upper end edge extending in the horizontal direction is airtightly connected to the top panel 40, and a lower end edge extending in the horizontal direction is airtightly connected to the floor surface 33. Between the right duct 27 (air flow path) and the left duct 28 (air flow path), an opening having the same area as the second entrance / exit 20 through which a worker can pass (enter / exit) is formed.

[0081] The right air intake 29 is disposed below the right duct 27 extending toward the floor surface 33. Specifically, it is disposed in the lower part of the right duct panel 62. The right air intake 28 has a rectangular planar shape and has a plurality of lattice-shaped openings, and takes in air A in the vicinity thereof including the second entrance / exit 20 that has flowed out to the outside of the second booth 19, or a mixture of air in the vicinity of the outside of the second booth 19 and air A. Note that the right air intake 29 may be disposed in the vicinity thereof including the second entrance / exit 20, and may be disposed, for example, below the right side wall panel 34, below the second right front wall panel 37, or below the second right panel 25.

[0082] The left air intake 30 is installed below the left duct 28 extending toward the floor surface 33. Specifically, it is installed in the lower part of the left duct panel 63. The left air intake 30 has a rectangular planar shape and has a plurality of lattice-shaped openings, and takes in air A in the vicinity thereof including the second entrance / exit 20 that has flowed out to the outside of the second booth 19, or a mixture of air in the vicinity of the outside of the second booth 19 and air A. Note that the left air intake 30 may be installed in the vicinity thereof including the second entrance / exit 20, and may be installed, for example, below the left side wall panel 34, below the second left front wall panel 38, or below the second left panel 26.

[0083] The controller is a physical computer (microcomputer) that has a central processing unit (CPU or MPU) and memory (main memory and cache memory), runs on an independent operating system (OS), and is equipped with a storage area. A touch panel is connected to the controller via an interface. The central processing unit of the controller starts an application stored in the memory based on the control of the operating system (OS), and performs air supply and exhaust operations according to the application.

[0084] Fig. 6 is a top view showing the flow of the indoor air and air A in the clean booth 10, and Fig. 7 is a side view similar to Fig. 3 showing the flow of the indoor air and air A in the clean booth 10. Fig. 8 is a front view similar to Fig. 4 showing the flow of the indoor air and air A in the clean booth 10, and Fig. 9 is a front view similar to Fig. 5 showing the flow of the indoor air and air A in the clean booth 10.

[0085] When performing various tasks using the safety cabinet 49 installed in the first booth 13 (main work booth), the worker enters the second booth 19 (auxiliary work booth) through the second entrance 20 while wearing clean clothing, and turns on the ON / OFF switch (not shown) of the booth installed in the second booth 19 and the ON / OFF switch (not shown) of the safety cabinet 49. When these ON / OFF switches are turned on, the controller transmits start signals to the control unit of the air conditioner 50 of the air supply system 16 (first air supply means), the control unit of the blower 54 of the right air supply system 23 (second air supply means), the control unit of the blower 58 of the left air supply system 24 (second air supply means), and the control unit of the blower of the safety cabinet 49.

[0086] The control unit of the air conditioner 50 and the control units of the fans 54, 58 that have received the start-up signal start the air conditioner 50 and the fans 54, 58 at the set output. Note that the air conditioning equipment of the building 11 is operating, and as indicated by arrow L2, a predetermined volume of conditioned air is being supplied to the inside (room) of the building 11 from the conditioned air intake port 31 installed on the ceiling of the room 12. The worker moves from the second booth 19 through the first entrance / exit 14 to the first booth 13, and then uses the safety cabinet 49 to perform various tasks.

[0087] The supply air volume of the air supply system 16 (first air supply means), the air supply volume of the right air supply system 23 (second air supply means), and the air supply volume of the left air supply system 24 (second air supply means) in the clean booth 10 (when a fan filter unit is used, the supply air volume) are adjusted by automatic adjustment (feedback control, etc.) using a controller (computer) and a room pressure sensor after the air conditioner 50 and the blowers 54, 58 are started, under the condition that the air pressure inside the clean booth 10 is kept at a slightly positive pressure according to the design air volume of the clean booth 10 at the time of installation. In addition, the supply air volume and the air supply volume may be adjusted by an operator using a remote controller outside the clean booth 10 when the air conditioner 50 and the blowers 54, 58 start operating, under the condition that the air pressure inside the clean booth 10 is kept at a slightly positive pressure according to the design air volume of the clean booth 10 at the time of installation.

[0088] When the air conditioner 50 of the air supply system 16 (first air supply means) is started, as shown by the arrow L1 in Fig. 7, indoor air inside the building 11 flows into the air conditioner 50 through its air intake louver, the indoor air is conditioned by the air conditioner 50 to become conditioned air, and the conditioned air passes through the duct 52 and flows through the HEPA filter 51 in the filter housing box 53. Air A (clean conditioned air) that has passed through the HEPA filter 51 is supplied from the first air supply port 15 through the ceiling of the first booth 13 toward the floor surface 33.

[0089] In the first booth 13, as shown by an arrow L1 in Fig. 6, air A supplied to the first booth 13 from the first air inlet 15 flows from the first booth 13 toward the first entrance / exit 14 and flows into the second booth 19 from the first entrance / exit 14. The air A that flows into the second booth 19 through the first booth 13 flows from the second booth 19 toward the second entrance / exit 20 and flows out from the second entrance / exit 20 to the outside (indoors) of the second booth 19. In the clean booth 10, the air A supplied to the first booth 13 generates an airflow from the first booth 13 toward the first entrance / exit 14 and from the first entrance / exit 14 toward the second booth 19, and also generates an airflow from the second booth 19 toward the second entrance / exit 20 and from the second entrance / exit 20 to the outside (indoors) of the second booth 19.

[0090] A portion of the air A (clean air) supplied to the inside of the first booth 13 flows into the air flow path from the air inlet opening of the safety cabinet 49, passes through the air flow path and passes through the HEPA filter to remove impurities, and then flows into the work chamber. A portion of the air A that has flowed into the work chamber passes through the HEPA filter to remove impurities, and is then exhausted to the outside of the work booth 13 from the exhaust port 65 through the exhaust duct 64 (see FIG. 7).

[0091] Therefore, a portion of the air A supplied from the air conditioner 50 of the air supply system 16 (first air supply means) is returned (returned) to the inside of the first booth 13 (clean booth 10) from the safety cabinet 49. Note that the air that has passed through the safety cabinet 49 may be exhausted into the room 12 or exhausted to the outside of the building 11 (outside air) without being returned to the inside of the first booth 13.

[0092] When the blower 54 of the right air supply system 23 (second air supply means) and the blower 58 of the left air supply system 24 (second air supply means) are started, as shown by arrow L1 in Figure 9, air A near the outside, including the second entrance / exit 20 that has flowed out to the outside of the second booth 19, is drawn into the right air intake 29 installed at the bottom of the right duct panel 62, and air A near the outside, including the second entrance / exit 20 that has flowed out to the outside of the second booth 19, is drawn into the left air intake 30 installed at the bottom of the left duct panel 63.

[0093] Air A sucked in from the right air intake 29 or a mixture of air sucked in near the outside of the second booth 19 and air A flows from the bottom to the top of the right duct 27, flows from the right duct 27 into the right connecting duct 56 arranged in the ceiling space 41 of the ceiling part, and flows from the right connecting duct 56 toward the filter housing box 57, as shown by arrow L1 in Figures 8 and 9. After impurities are removed from the air A or the mixed air by passing through the HEPA filter 55 housed in the filter housing box 57, the air A or the mixed air is supplied from the second right air supply 21 (second air supply 21) from the ceiling of the second booth 19 toward the floor surface 33.

[0094] Air A sucked in from the left air intake 30 or a mixture of air sucked in near the outside of the second booth 19 and air A flows from the bottom to the top of the left duct 28, flows from the left duct 28 into the left connecting duct 60 arranged in the ceiling space 41 in the ceiling part, and flows from the left connecting duct 60 toward the filter housing box 61, as shown by arrow L1 in Figures 8 and 9. After impurities are removed from the air A or the mixed air by passing through the HEPA filter 59 housed in the filter housing box 61, the air A or the mixed air is supplied from the second left air supply port 22 (second air supply port) from the ceiling of the second booth 19 toward the floor surface 33.

[0095] 6, the air A or mixed air supplied to the second booth 19 from the second right air inlet 21 and the second left air inlet 22 flows from the second booth 19 toward the second entrance / exit 20 and flows out from the second entrance / exit 20 to the outside (indoors) of the second booth 19. In the clean booth 10, the air A or mixed air supplied to the second booth 19 generates an airflow that flows from the second booth 19 toward the second entrance / exit 20 and also flows from the second entrance / exit 20 to the outside (indoors) of the second booth 19.

[0096] In the clean booth 10, the internal air pressure of the first and second booths 13, 19 can be maintained at a slightly positive pressure while corresponding to the volume of the first and second booths 13, 19 and the return air volume of air returned from the safety cabinet 49 to the first booth 13, and the supply air volume and supply direction of the air conditioner 50 of the air supply system 16 (first air supply means) are adjusted so that the supply air A or mixed air generates an airflow inside the first and second booths 13, 19 that flows in one direction (front-to-back direction) from the first booth 13 to the first entrance / exit 14 and from the second booth 19 to the second entrance / exit 20 from the first booth 13 to the second entrance / exit 20, and the supply air volume and supply direction of the blower 54 of the right air supply system 23 (second air supply means) and the blower 58 of the left air supply system 24 (second air supply means) are adjusted.

[0097] Although not shown in the figure, the second right air intake 21 (second air intake) and the second left air intake 22 (second air intake) may not be installed in the second booth 19, and the right connecting duct 56 and the left connecting duct 60 may extend outside (inside) the clean booth 10, and air A or mixed air taken in from the right air intake 29 may be exhausted to the inside of the room 12 through the right duct 27 and the right connecting duct 56, and air A or mixed air taken in from the left air intake 30 may be exhausted to the inside of the room 12 through the left duct 28 and the left connecting duct 60.

[0098] In the clean booth 10, the cleanliness of the air A or mixed air supplied to the first and second booths 13, 19 is higher than that of the indoor air in the room 12 of the building 11. The cleanliness of the air A flowing through the first booth 13 is the highest, the cleanliness of the air A or mixed air flowing through the second booth 19 is the second highest, and the cleanliness of the air A or mixed air in the second booth 19 is lower than that of the first booth 13. Furthermore, the cleanliness of the indoor air in the room 12 of the building 11 is lower than that of the air A or mixed air flowing through the first and second booths 13, 19.

[0099] In the clean booth 10, a predetermined volume of conditioned air is supplied from the conditioned air inlet 31 of the air conditioning equipment to the inside (room) of the room 12 of the building 11, which may cause turbulence in the air flow inside the building 11 and may act on the second entrance / exit 20 opening between the second right front wall 46 and the second right front wall 47. Furthermore, the designed volume of air A inside the first booth 13 (inside the clean booth 10) may be insufficient by the amount of air suction by the safety cabinet 49, and the wind speed of the air A or mixed air flowing through the first entrance / exit 14 and the second entrance / exit 20 may decrease.

[0100] If the wind speed of air A or mixed air flowing through the first entrance / exit 14 and the second entrance / exit 20 decreases and airflow turbulence caused by the supply of conditioned air from the air conditioning equipment acts on the second entrance / exit 20, some of the indoor air inside (indoors) of room 12 of building 11 will flow (backflow) from the second entrance / exit 20 into the inside of the second booth 19, which may cause contamination of air A or mixed air flowing inside the first and second booths 13, 19 with the indoor air inside (indoors) of room 12 of building 11.

[0101] However, in the clean booth 10, the air that has passed through the safety cabinet 49 (work facility) is returned to the first booth 13, thereby making up for the lack of the design air volume in the first booth 13 and preventing a decrease in the air speed at the first and second entrances 14 and 20. Furthermore, even if airflow disturbances (external disturbances inside the building 11) caused by the supply of conditioned air from the conditioned air intake 31 act on the second entrance 20 and the indoor air of the room 12 attempts to enter the second booth 19 from the second entrance 20, the air supply system 16 (first air supply The air A or mixed air supplied to the first and second booths 13, 19 by the right air supply system 23 (second air supply means), the right air supply system 24 (second air supply means) generates an air current that flows in one direction (front-to-back direction) from the first booth 13 to the first entrance / exit 14, from the first entrance / exit 14 to the second booth 19, and from the second booth 19 to the second entrance / exit 20, thereby preventing the indoor air of the room 12 from entering the second booth 19 from the second entrance / exit 20 or from entering the first booth 13 from the first entrance / exit 14.

[0102] Furthermore, even if airflow disturbance caused by the supply of conditioned air from the air-conditioning air intake port 31 (external disturbance inside the building 11) acts on the second entrance / exit 20 opening between the second right front wall 46 and the second right front wall 47, the air layer in the second booth 19 of a specified volume (air A or mixed air supplied to the second booth 19 by the right air supply system 23 (second air supply means) and the left air supply system 24 (second air supply means)) becomes a resistance to the indoor air of the room attempting to enter the second booth 19 from the second entrance / exit 20, and the effect of the disturbance is mitigated or eliminated by the air A or mixed air in the second booth 19, and the flow (airflow) of air A inside the first booth 13 flowing out from the first entrance / exit 14 is maintained.

[0103] Furthermore, since the flow velocity of air A or mixed air flowing through the second entrance / exit 20 is faster than the flow velocity of air A flowing through the first entrance / exit 14, the flow velocity of air A or mixed air does not decrease in the second booth 19, and air A or mixed air flows from the second booth 19 toward the second entrance / exit 20 at a predetermined flow velocity, and flows out from the second entrance / exit 20 to the outside of the second booth 19.

[0104] In the clean booth 10 (booth), air A or mixed air is supplied to the first and second booths 13, 19 from the air supply system 16 (first air supply means), the right air supply system 23 (second air supply means), and the left air supply system 24 (second air supply means), generating an air flow from the first booth 13 to the first entrance / exit 14, from the first entrance / exit 14 to the second booth 19, and from the second booth 19 to the second entrance / exit 20 in one direction (front-rear direction). To maintain this air flow, the air supply system 16, the right air supply system 23, and the left air supply system 24 supply air to the first and second booths 13, 19. The supply air volume and outflow air volume of air A or mixed air supplied to the booths 13, 19 are adjusted, and further, by exhausting the air that has passed through the safety cabinet 49 to the outside of the first booth 13, it is possible to prevent a deficiency in the design air volume of the supply air in the first and second booths 13, 19 and a decrease in wind speed at the first and second entrances / exits 14, 20. Air A inside the first booth 13 can be made to flow into the second booth 19 from the first entrance / exit 14, and air A or mixed air inside the second booth 19 can be made to flow out from the second entrance / exit 20 to the outside of the second booth 19 (indoors).

[0105] The clean booth 10 (booth) includes a first booth 13 capable of accommodating various experimental equipment (work equipment) and having a predetermined work space 48, a first entrance / exit 14 provided for entering and exiting the first booth 13 and through which air A supplied to the inside of the first booth 13 flows out, an air supply system 16 (first air supply means) that generates an air flow that flows in one direction from a first air supply port 15 installed in the first booth 13 toward the first entrance / exit 14, a second booth 19 through which the air A flowing out from the first booth 13 flows in, and a second entrance / exit 20 through which the air A or mixed air flowing into the inside of the second booth 19 flows out, and is a safety cabinet. While the air that has passed through the net 49 is returned to the first booth 13, air A supplied to the inside of the first booth 13 from the first air intake port 15 by the air supply system 16 (first air supply means) flows in one direction from the first booth 13 toward the first entrance / exit 14, then flows in one direction from the first entrance / exit 14 toward the second booth 19, and then flows out to the outside of the second booth 19 from the second entrance / exit 20, thereby preventing backflow of indoor air in room 12 of the building 11 from the first entrance / exit 14 into the inside of the first booth 13, and preventing backflow of indoor air in room 12 of the building 11 from the second entrance / exit 20 into the inside of the second booth 19.

[0106] The clean booth 10 (booth) prevents indoor air from the room 12 of the building 11 from flowing back into the inside of the second booth 19 from the second entrance / exit 20, and prevents indoor air from the room 12 of the building 11 from flowing back into the inside of the first booth 13 from the first entrance / exit 14, thereby maintaining a clean state inside the first and second booths 13, 19. Even if air turbulence occurs inside the room 12 of the building 11 in which the clean booth 10 is installed due to a certain factor and the air turbulence generated inside the room 12 acts on the clean booth 10, the clean booth 10 can prevent the indoor air of the room 12 of the building 11 from flowing into the second booth 19 and can also prevent the indoor air of the room 12 from flowing into the first booth 13. This prevents contamination of the indoor air of the room 12 with the air A or mixed air inside the first and second booths 13, 19, and can maintain the air quality inside the first and second booths 13, 19 at the same state as the air A when it is taken in from the first air intake port, while reliably maintaining the clean state inside the first and second booths 13, 19.

[0107] In the clean booth 10 (booth), air A or mixed air is sucked in from the right air intake 29 and the left air intake 30 (air intake) installed in the vicinity of the second entrance 20 and the right air supply system 23 (second air supply means) and the left air supply system 24 (second air supply means) into the second booth 19. Therefore, even if air A flowing out of the second booth 19 tries to flow into the second booth 19 from the second entrance 20, the right air supply system 23 (second air supply means) and the left air supply system 24 By generating an air flow of air A or mixed air that flows in one direction from the second booth 19 toward the second entrance / exit 20 and from the second entrance / exit 20 toward the outside of the second booth 19 using the (second air supply means), it is possible to reliably prevent the indoor air of room 12 of the building 11 from flowing into the inside of the second booth 19, thereby preventing contamination of the indoor air of room 12 with the air A inside the second booth 19, and reliably maintaining a clean state inside the second booth 19.

[0108] In the clean booth 10 (booth), the lateral separation dimension between the second right panel 25 and the second left panel 26 is smaller than the lateral separation dimension between the first right panel 17 and the first left panel 18, so that the flow rate of air A or mixed air passing between the second right panel 25 and the second left panel 26 and flowing out to the outside of the second booth 19 can be increased, and the air A or mixed air can be reliably flowed out to the outside of the second booth 19 from the second entrance / exit 20.

[0109] The clean booth 10 (booth) has a first right panel 17 (first panel) and a first left panel 18 (first panel) which are located on both sides of the first entrance / exit 14 and extend from the floor surface 33 toward the top panel 40 (top surface), and which extend a predetermined length toward the inside of the second booth 19, and these panels 17, 18 do not disturb the airflow in the vicinity thereof, including the first entrance / exit 14, and the air A supplied from the first air supply port 15 by the air supply system 16 (first air supply means) to the inside of the first booth 13 can flow smoothly in one direction from the first booth 13 to the first entrance / exit 14, and the air A can flow smoothly in one direction from the first entrance / exit 14 toward the second booth 19.

[0110] The clean booth 10 (booth) has a second right panel 25 (second panel) and a second left panel 26 (second panel) located on both sides of the second entrance 20, extending from the floor surface 33 toward the top panel 40 (top surface) and extending a predetermined length toward the outside of the second booth 19. These panels 25, 26 act as air straightening plates to prevent turbulence of the air current, so that the air current in the vicinity of the second entrance 20 and the surrounding area is not turbulent, and the first air supply system 16 (first air supply means) supplies the first air to the second entrance 20. Air A supplied into the first booth 13 from the air intake 15 can be smoothly discharged to the outside of the second booth 19 from the second entrance / exit 20, and air A or mixed air supplied into the second booth 19 from the second right air intake 21 (second air intake) and the second left air intake 22 (second air intake) by the right air supply system 23 (second air supply means) and the left air supply system 24 (second air supply means) can be smoothly discharged to the outside of the second booth 19 from the second entrance / exit 20. [Explanation of symbols]

[0111] 10 Clean Booth (Booth) 11 Buildings 12 rooms 13 Booth No. 1 (Main Work Booth) 14 1st entrance / exit 15 1st air supply port 16 Air supply system (first air supply means) 17 First right panel (first panel) 18 First Left Panel (First Panel) 19 Booth No. 2 (Auxiliary Work Booth) 20 2nd entrance / exit 21 2nd right air supply port (2nd air supply port) 22 2nd left air supply port (2nd air supply port) 23 Right air supply system (second air supply means) 24 Left air supply system (second air supply means) 25 Second right panel (Second panel) 26 Second Left Panel (Second Panel) 27 Right duct (air flow path) 28 Left duct (air flow path) 29 Right intake (intake) 30 Left intake (intake) 31 Air conditioning air intake 32 Ceiling Panel 33 Floor 34 Sidewall Panel 35 1st right front wall panel 36 1st left front wall panel 37 Second right front wall panel 38 2nd left front wall panel 39 Side Panel 40 Top Panel 41 Ceiling space 42 Back wall 43 Both side walls 44 1st right front wall 45 1st left front wall 46 2nd right front wall 47 2nd left front wall 48 Working Space 49 Safety Cabinet 50 Air conditioner 51 HEPA Filter 52 Duct 53 Filter storage box 54 Blower 55 HEPA filter 56 Right connecting duct 57 Filter storage box 58 Blower 59 HEPA Filter 60 Left connecting duct 61 Filter storage box 62 Right duct panel 63 Left duct panel 64 Exhaust Duct 65 Exhaust port 66 Ceiling surface

Claims

1. A booth installed in a predetermined location in a room of a building, partitioned from the room by a ceiling, a floor, and wall panels, and capable of housing work equipment therein, the booth comprises: a first booth having a predetermined work space; a first entrance / exit provided for a worker to enter and exit the first booth, through which air A supplied into the inside of the first booth flows out; a first air supply means for generating an air current flowing in one direction from a first air supply port provided in the first booth toward the first entrance / exit; a second booth adjacent to the first booth, connected to the first entrance / exit, through which air A flowing out of the first booth flows in; a second entrance / exit provided for a worker to enter and exit the second booth, through which air A flowing into the inside of the second booth flows out; first panels located on both sides of the first entrance / exit and extending from the floor surface toward the top surface and extending a predetermined length toward the inside of the second booth; and second panels located on both sides of the second entrance / exit and extending from the floor surface toward the top surface and extending a predetermined length toward the outside of the second booth, In the booth, air A supplied into the first booth from the first air supply port by the first air supply means flows in one direction from the first booth toward the first entrance / exit, flows in one direction from the first entrance / exit toward the second booth, and then flows out to the outside of the second booth from the second entrance / exit.

2. 2. The booth according to claim 1, further comprising: an air intake port installed in the vicinity of and including the second entrance / exit for drawing in air A that has flowed out to the outside of the second booth; and a second air supply means for generating an air flow that flows in one direction from the second booth toward the second entrance / exit by the air A supplied into the interior of the second booth, wherein the air A supplied into the interior of the second booth by the second air supply means flows in one direction from the second booth toward the second entrance / exit while flowing out to the outside of the second booth from the second entrance / exit.

3. 3. The booth according to claim 2, wherein the booth includes a second air supply port installed in the second booth for supplying air A supplied by the second air supply means to the second booth, and an air flow path connecting the air intake port and the second air supply port, wherein in the booth, the second air supply means supplies air A sucked in from the air intake port into the inside of the second booth, and air A supplied by the second air supply means from the second air intake port into the inside of the second booth flows in one direction from the second booth toward the second entrance / exit, and flows out to the outside of the second booth from the second entrance / exit.

4. 4. The booth according to claim 3, wherein the air A is clean air, and the cleanliness of the clean air is higher than that of indoor air in a room of the building.

5. The booth described in claim 4, wherein the air flow path is a duct extending vertically from the floor side toward the top side, the air intake is installed below the duct extending on the floor side, and a second air supply port connected to the duct is installed above the second booth.

6. 6. The booth according to claim 5, wherein the first panel is formed from a pair of a first right panel and a first left panel that face each other at a predetermined distance in the horizontal direction at the first entrance, the second panel is formed from a pair of a second right panel and a second left panel that face each other at a predetermined distance in the horizontal direction at the second entrance, and the horizontal distance between the second right panel and the second left panel is smaller than the horizontal distance between the first right panel and the first left panel.

7. The booth described in claim 6, wherein the first right panel and the first left panel are located between the floor surface and the top surface, the vertical length dimension of the first right panel and the first left panel is the same as the vertical height dimension of the booth from the floor surface to the top surface, and the second right panel and the second left panel are located between the floor surface and the top surface, and the vertical length dimension of the second right panel and the second left panel is the same as the vertical height dimension of the booth from the floor surface to the top surface.

8. The booth described in claim 7, wherein the first air supply means is an air supply system equipped with an air conditioner and a HEPA filter and supplying the air A to the inside of the first booth from the first air supply port installed above the first booth, or a first fan filter unit installed above the first booth and supplying the air A to the inside of the first booth from the first air supply port.

9. The booth described in claim 8, wherein the second air supply means is an air supply system equipped with a blower and a HEPA filter and supplying the air A into the inside of the second booth from the second air supply port installed above the second booth, or a second fan filter unit installed above the second booth and supplying the air A into the inside of the second booth from the second air supply port.

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