Ventilator

Abstract

To provide a ventilator capable of efficiently ventilating medium to be ventilated occurring during work in a building, to improve a thermal environment in the building.SOLUTION: A ventilator for ventilating a first work area in a building 1 having side walls 1a-1d, comprises fixed ventilation fans 30a-30f mounted on the right side wall 1a and a movable ventilation fan 20 that is arranged so as to be movable to a position where the first work area is sandwiched between the fixed ventilation fans 30a-30f. The fixed ventilation fans 30a-30f can rotate in one direction to exhaust air outside the building 1 or in the other direction to suction air into the building 1. The movable ventilation fan 20 can change an air supply direction between an exhaust support direction of sending air toward the fixed ventilation fans 30a-30f and a suction support direction of suctioning air from the fixed ventilation fans 30a-30f into the building 1.SELECTED DRAWING: Figure 9

Description

[Technical Field]

[0001] The present invention relates to a ventilation device for a medium to be ventilated that is generated by work carried out inside a building such as a soundproof house installed above ground, such as a starting shaft for a shield tunneling method. [Background technology]

[0002] Various tasks are carried out inside buildings such as soundproof houses installed above ground, such as the starting shaft for the shield tunneling method. Some of these tasks generate ventilated media that require ventilation. Specific examples of these tasks include sealing segments, transporting excavated soil and equipment, and modifying the excavated soil.

[0003] Ventilated media generated by work include organic gases from organic solvents contained in adhesives when sealing segments, exhaust gases from transporting excavated soil and transporting equipment, and dust from modifiers when modifying excavated soil.

[0004] Prior art for ventilating ventilated media generated by work inside such buildings is disclosed in Patent Document 1. This prior art is intended to accurately ventilate dust, organic gases, exhaust gases, etc., in separate work areas within a soundproof house, and is configured to provide multiple intake and exhaust means on each of the three side walls of the soundproof house in multiple rows across the width of each side wall, including in multiple vertical rows and in multiple rows in the same row and row facing each other, with a three-dimensional mesh-like ventilation airflow area formed in each area within the house body by combining the intake and exhaust of each intake and exhaust means, and forcibly exhausting the organic gases, exhaust gases, dust, and underground exhaust generated within the house body during shield and excavation work to the outside of the house body while containing them in each area and preventing their diffusion.

[0005] Also proposed is a ventilation system as described in Patent Document 2. In this ventilation system, in order to efficiently ventilate ventilated media such as organic gases generated by work inside a building, multiple exhaust fans are provided along the side walls of the building, and a blower is movably installed along the side wall where the exhaust fans are provided, and the ventilated media generated in the work area between the blowers and the exhaust fans is discharged outside the building by push-pull ventilation. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 5469989 [Patent Document 2] Japanese Patent Application Publication No. 2018-179338 Summary of the Invention [Problem to be solved by the invention]

[0007] The technologies described in Patent Documents 1 and 2 above can provide appropriate ventilation for each work area, but they focus on the discharge of the ventilated medium and do not take into consideration the thermal environment inside the building. In particular, temperatures inside buildings tend to rise in the summer due to the effects of global warming, which is becoming a serious problem from the perspective of worker health and work efficiency.

[0008] The applicant of the present invention has found that the temperature inside a building can be lowered by actively using machinery to draw in outside air into the building during the night or other times when there is less work being done inside the building. The present invention was made based on the above findings, and its purpose is to provide a ventilation device that can efficiently ventilate the ventilated medium generated by work inside a building and improve the thermal environment inside the building. [Means for solving the problem]

[0009] The invention of claim 1 of the present application is a ventilation device for ventilating the interior of a building having a top wall, a side wall, and a work area, wherein the work area has a first work area adjacent to the side wall, and the ventilation device is characterized by comprising: a fixed ventilation fan fixed to the side wall adjacent to the first work area, having a rotating fan and capable of rotating the fan in one direction to exhaust air outside the building or in another direction opposite to the one direction to draw air into the building; a rotation direction control unit that rotates the fan of the fixed ventilation fan in either the one direction or the other direction; and a movable ventilation fan that is positioned within the building at a position sandwiching the first work area between itself and the fixed ventilation fan, is movable, and can change the air supply direction between an exhaust support direction that sends air toward the fixed ventilation fan and an intake support direction that draws air from the fixed ventilation fan into the building.

[0010] The invention of claim 2 of the present application is a ventilation device for ventilating the interior of a building having a top wall, side walls, and a work area, wherein the work area has a first work area that is arranged adjacent to each other in a direction along the side wall, and the ventilation device is characterized by comprising: fixed ventilation fans that are fixedly installed on the side walls adjacent to the first work areas and across the multiple first work areas, the fixed ventilation fans having a rotating fan and capable of rotating the fan in one direction to exhaust air outside the building or in another direction opposite to the one direction to draw air into the building; a rotation direction control unit that rotates the fan of the fixed ventilation fan in either the one direction or the other direction; and a mobile ventilation fan that is arranged in a position sandwiching the first work area between itself and the fixed ventilation fan, the mobile ventilation fan being movable within the building in a direction along the side wall on which the fixed ventilation fan is installed and across the multiple first work areas, and capable of changing its air supply direction between an exhaust support direction in which the mobile ventilation fan sends air toward the fixed ventilation fan and an intake support direction in which the mobile ventilation fan draws air from the fixed ventilation fan into the building.

[0011] The invention of claim 3 of the present application is a ventilation device as described in claim 1 or claim 2, characterized in that the rotation direction control unit is provided with a rotation setting unit that rotates the fan of the fixed ventilation fan in one direction when work is being performed in the first work area, and rotates the fan of the fixed ventilation fan in the other direction when work is not being performed in the first work area.

[0012] The invention of claim 4 of the present application is a ventilation device as described in claim 1 or claim 2, characterized in that the working area further includes a second working area, and the second working area is positioned in the air blowing direction of the movable ventilation fan when the air blowing direction of the movable ventilation fan becomes the intake assistance direction.

[0013] The invention according to claim 5 of the present application is the ventilation device according to claim 1 or 2, characterized in that the moving ventilation fan is provided with a nozzle that sprays mist into the supplied air.

[0014] The invention according to claim 6 of the present application is the ventilation device according to claim 1 or claim 2, characterized in that the fixed ventilation fan is provided with a nozzle that sprays mist onto the air supplied from the fan on the building side.

[0015] A seventh aspect of the present invention is the ventilation device according to the first or second aspect, characterized in that the fixed ventilation fan is provided below half the height of the side wall. [Effects of the Invention]

[0016] According to the present invention, ventilated media generated during work inside a building can be efficiently discharged outside the building using push-pull ventilation with exhaust from a fixed ventilation fan and exhaust support from a mobile ventilation fan. At night, when there is less work being done inside the building, cooled outside air can be drawn into the building using the intake of fixed ventilation fans and the intake support of mobile ventilation fans, thereby lowering the temperature inside the building. [Brief explanation of the drawings]

[0017] [Figure 1]1 is an overall plan view of a building to which a ventilation device according to a first embodiment of the present invention is applied, when exhaust is being performed by a fixed ventilation fan. [Figure 2] 1 is a front view of a building to which a ventilation device according to a first embodiment of the present invention is applied. [Figure 3] 1A and 1B are a plan view and a side view of a ventilation device according to a first embodiment of the present invention. [Figure 4] 1A and 1B are a front view and a side layout view of a moving ventilation fan according to a first embodiment of the present invention, respectively; [Figure 5] 1A and 1B are a rear view and a side view of a fixed ventilation fan according to a first embodiment of the present invention. [Figure 6] 1 is a front view of a control panel of a ventilation device according to a first embodiment of the present invention. [Figure 7] FIG. 2 is a control explanatory diagram of the ventilation device according to the first embodiment of the present invention. [Figure 8] FIG. 1 is an explanatory diagram illustrating the operation of a ventilation device according to a first embodiment of the present invention. [Figure 9] 1 is an overall plan view of a building to which a ventilation device according to a first embodiment of the present invention is applied, when air is being drawn in by a fixed ventilation fan. [Figure 10] FIG. 10 is a side layout view of a ventilation device according to a second embodiment of the present invention. [Figure 11] FIG. 10 is a side layout view of a ventilation device according to a third embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0018] [First embodiment] A first embodiment of the present invention will be described below with reference to FIGS. 1 to 9 of the drawings.

[0019] In the first embodiment, a ventilation device according to the present invention is applied to a starting shaft base for a shield tunneling method. FIG. 1 is a plan view of a starting shaft base for an earth pressure shield tunneling method, and FIG. 2 is a front view of the starting shaft base.

[0020] The departure shaft base is enclosed by a soundproof building 1. Building 1 has a right side wall 1a, a left side wall 1b, a rear side wall 1c, a front side wall 1d, and a top wall 1e. The front side wall 1d has a vehicle entrance / exit section 1f, which is an opening that can be opened and closed by a shutter 100.

[0021] In this embodiment, the building 1 is a so-called soundproof house that has soundproofing capabilities, but the building may not have soundproofing capabilities.

[0022] As shown in Figure 1, a starting shaft opening 2 is opened inside building 1, and materials and equipment such as segments 4 are carried into the tunnel by an overhead traveling crane 3. The overhead traveling crane 3 runs on traveling rails 3a installed in the left-right direction at the top of the front wall 1d and rear wall 1c.

[0023] The segments 4 are carried into the building 1 by a segment delivery vehicle 5 through the vehicle entrance / exit section 1f, and are then stocked in a segment stockyard 6 near the right side wall 1a by an overhead traveling crane 3. In the segment stockyard 6, which is the work area, stickers are applied to the segments. The stickered segments 4 are then carried in through the departure shaft opening 2.

[0024] Excavated soil generated by tunnel excavation is lifted up from the starting shaft opening 2 together with a waste car (not shown) by an overhead traveling crane 3. The excavated soil inside the waste car is stored in a soil pit 7 and then loaded onto a soil removal vehicle 9 by a backhoe 8 for removal.

[0025] To the left of the earth and sand pit 7 is located additive equipment 10, which mixes and supplies excavation additives used in the earth pressure shield method. Further to the left of the additive equipment 10 is located backfill injection equipment 11.

[0026] A turbid water treatment facility 12 is located in front of the additive facility 10. A central control room 13 is located in front of the backfill injection facility 11. A material storage area 14 is located in front of the segment stockyard 6.

[0027] As shown in Figure 2, exhaust devices 101 equipped with ventilation fans that constantly rotate in the exhaust direction are installed on the upper wall 1e and are located above the departure shaft opening 2, earth and sand pit 7, additive material equipment 10, turbid water treatment equipment 12, etc. Exhaust device 101a is located above the additive material equipment 10, backfill injection equipment 11, turbid water treatment equipment 12, and central control room 13 to ventilate. Exhaust device 101b is located above the earth and sand pit 7, backhoe 8, earth and sand removal vehicle 9, and segment delivery vehicle 5 to ventilate. Exhaust device 101c is located above the departure shaft opening 2 to ventilate.

[0028] As shown in Figures 1 and 2, openings 102, which are ventilation openings without ventilation fans, are formed at the front and rear ends of the left side wall 1b, at a position behind the starting shaft opening 2 and the earth pit 7 in the rear wall 1c, and in front of the starting shaft opening 2 in the front wall 1d. Openings 102a are located at relatively low positions near both ends of the left side wall 1b, near which the additive equipment 10, backfill injection equipment 11, turbid water treatment equipment 12, and central control room 13 are located, and are primarily for ventilation of the exhaust system 101a. Openings 102b are located at relatively low positions on the rear wall 1c, near which the earth pit 7, backhoe 8, earth removal vehicle 9, and segment delivery vehicle 5 are located, and are primarily for ventilation of the exhaust system 101b. Openings 102c are located at relatively low positions on the front wall 1d, near which the starting shaft opening 2 is located, and are primarily for ventilation of the exhaust system 101c and the air supply fan 200. The opening 102d is provided at a relatively low position on the front wall 1d and the rear wall 1c near which the movable ventilation fan 20, which will be described later, is disposed, and is mainly for ventilation of the movable ventilation fan 20. An air supply fan 200 having a fan for sending air into the tunnel is provided at the starting shaft opening 2.

[0029] A movable ventilation fan 20 is disposed on the left side of the segment stockyard 6. The movable ventilation fan 20 is movable in the front-rear direction indicated by arrows Y1 and Y2, that is, along the right side wall 1a.

[0030] A plurality of fixed ventilation fans 30 (six fans 30a to 30f) are provided on the right side wall 1a adjacent to each other in the longitudinal direction of the segment stockyard 6.

[0031] In the segment stockyard 6, the segments 4 are stacked in groups of five pieces, which is equivalent to one ring, as shown in Fig. 3(B), and are stocked in multiple locations in a planar fashion. In this embodiment, as shown in Fig. 1, 27 rings (135 pieces) are stocked in nine rows in the front-to-back direction and three rows in the left-to-right direction.

[0032] With the segments stocked in this way, the work of applying stickers to each segment 4 begins. The sealing work involves workers applying adhesive to the segments 4 and then applying the sealant. The workers move from ring to ring to perform the sealing work. When applying the adhesive, they use a container containing small amounts of adhesive and a brush to apply the adhesive. The adhesive used is a chloroprene rubber solvent-based adhesive containing ingredients such as toluene, normal hexane, and cyclohexane. During the sealing work, these ingredients turn into vapor and generate organic gases (ventilated medium).

[0033] In order to safely and efficiently ventilate organic gases generated by the sealing work, the work area in the segment stockyard 6 is divided into a plurality of first work areas, and each first work area is ventilated. In this embodiment, as shown in Fig. 3(A), the work area is divided into three first work areas A, B, and C.

[0034] Then, the movable ventilation fan 20 is moved to the left of either side of the first work area, and the first work area is sandwiched between the movable ventilation fan 20 and the corresponding fixed ventilation fan 30, and they cooperate to ventilate the first work area.

[0035] When a seal pasting operation is being performed in any of the first work areas A, B, and C, a mobile ventilation fan 20 is arranged on the left side of the first work area where the operation is being performed and sends air toward the fixed ventilation fan 30, and the fixed ventilation fan 30 arranged on the right side of the first work area is activated to exhaust the air.

[0036] Figure 3(A) shows an example of a situation in which sticker application work is being carried out in the first work area B, with a mobile ventilation fan 20 positioned on the left side of the first work area B blowing air toward the fixed ventilation fans 30c and 30d, and the fixed ventilation fans 30c and 30d positioned on the right side of the first work area B operating to exhaust air. This ventilation is an open push-pull type ventilation.

[0037] The organic gases generated during the sealing work, such as toluene, normal hexane, and cyclohexane, have a vapor density heavier than air, so safer and more efficient ventilation equipment is installed.

[0038] 3(B), the center line 20L of the airflow of the movable ventilation fan 20 is directed parallel to the ground surface. The fixed ventilation fans 30a to 30f are provided at positions lower than the height of the stacked pieces of the segment 4 and lower than the center line 20L of the right side wall 1a. This creates a ventilation flow that flows diagonally downward, allowing organic gases that are heavier than air to be safely and efficiently exhausted, and low-temperature air at low altitudes to be sent to the work area. 3(B) is the foundation of the building 1.

[0039] Although the ventilation airflow is generated in the diagonally downward direction, the present invention is not limited to this, and the fixed ventilation fans 30a to 30f may be provided at a position higher than the center line 20L of the right side wall 1a.

[0040] Since the movable ventilation fan 20 can be moved within the building 1, it can be arranged only in the first work area where ventilation is required, and the movable ventilation fan 20 is not arranged in other first work areas, so that space within the building 1 is not occupied.

[0041] As shown in Figure 4(A), the moving ventilation fan 20 has a rotating blade 22a inside a main body frame 21. The rotating blade 22a has four blades and is rotated around a rotation shaft 22b by a drive motor (not shown). The rotating blade 22a rotates in only one direction.

[0042] The main body frame 21 is provided with an angle adjustment shaft 21a, which is rotatably supported by the machine base frame 23. This allows the elevation angle of the air to be changed. For example, as shown in FIG. 4(B), the air can be blown obliquely downward to generate a ventilation flow toward the fixed ventilation fans 30a to 30f. This allows for safer and more efficient ventilation than that shown in FIG. 3(B).

[0043] As shown in Figure 4(A), wheel mounting parts 23a are provided at the bottom of the machine frame 23, and wheels 24 are attached to these wheel mounting parts 23a. These wheels 24 enable the mobile ventilation fan 20 to move in the directions of arrows Y1 and Y2, and also to rotate on the spot to change the air blowing direction. The moving ventilation fan 20 may be moved manually or by providing a drive motor to rotate the wheels 24.

[0044] The main body frame 21 is provided with a front frame 21b on the air blowing side in front of the rotary blades 22a, so as to cross the rotary blades 22a vertically.

[0045] Further forward of the front frame 21b, above and below the rotary vanes 22a on the air blowing side, there are provided spraying devices 25 connected to water supply pipes (not shown).

[0046] The atomizer 25 includes a ring pipe 250, which is an annular pipe provided on the front frame 21b, and a plurality of nozzles 251 (four in this embodiment) provided on the ring pipe 250.

[0047] Water is supplied from a water supply pipe (not shown) through the inside of a ring pipe 250, and mist can be sprayed from a nozzle 251. When the rotating blades 22a of the moving ventilation fan 20 spray mist while blowing air, the area of ​​the building 1 to which the air is blown is cooled by the heat of vaporization.

[0048] The fixed ventilation fan 30 is an axial flow type pressurized ventilation fan, and as shown in Figures 5(A) and 5(B), it comprises a support frame 300 fixed to a through hole formed in the right side wall 1a, a support pipe 301 extending from the four corners of the support frame 300 toward the center, a motor 302 fixed to the tip of the support pipe 301, and a fan 303 having a plurality of blades 3030 attached to the output shaft of the motor 302.

[0049] The support tube 301 is located on the indoor side of the fan 303, and the central axis of rotation of the fan 303 extends horizontally from the indoors to the outdoors. A hood 304 is installed on the outdoor side of the ventilation opening to which the fixed ventilation fan 30 is attached (FIG. 3).

[0050] A rotation control device 28 is built into a ventilation device control panel 27 (see FIGS. 3(A) and 7) provided on the rear wall 1c side of the building 1, and this rotation control device 28 is connected to a motor 302.

[0051] Rotation control device 28 rotates fan 303 of fixed ventilation fan 30 in one direction or the other direction opposite to the one direction, and is configured, for example, to include an electromagnetic contactor that is incorporated between motor 302 and a power source and switches two of the R, S, and T phases of the three-phase power source to connect them to the U, V, and W phases of the output wires of motor 302. Rotation control device 28 corresponds to the rotation direction control unit of the present invention.

[0052] When the rotation control device 28 controls the motor 302 and the fan 303 to rotate in one direction (forward rotation, counterclockwise rotation in FIG. 5(A)), the air inside the building 1 is exhausted to the outside of the building 1. The air blowing direction indicated by the arrow in FIG. 5(B) is the direction when the fan 303 rotates in one direction.

[0053] When the rotation control device 28 controls the motor 302 and the fan 303 to rotate in the other direction (reverse rotation, clockwise rotation in FIG. 5(A)), air outside the building 1 is drawn into the building 1.

[0054] The blades 3030 of the fan 303 of the fixed ventilation fan 30 are shaped so that the tip is tapered when rotating in one direction and the tip is swollen when rotating in the other direction.

[0055] In an axial flow type pressurized ventilation fan such as the fixed ventilation fan 30 of this embodiment, if the fan 303 is turned over so that the side facing outdoors faces indoors, outside air can be drawn into the building 1 even when the motor 302 is rotated forward. However, since it is extremely troublesome to change the fan 303 every time the fan is switched between exhaust and intake, it is more reasonable to change the direction of rotation.

[0056] A water supply pipe (not shown) is connected to the support pipe 301, and a spray nozzle 3010 is provided on the indoor surface of the support pipe 301, forming a spraying device. Mist can be sprayed from a nozzle 3010 through the inside of the support pipe 301 from a water supply pipe (not shown).

[0057] When the fan 303 of the fixed ventilation fan 30 is rotated in the other direction to send (intake) air from outside the building 1 to inside the building 1 while spraying mist from the nozzle 3010, the mist is cooled by the heat of vaporization and the temperature inside the building 1 can be lowered.

[0058] As shown in Figure 4(A), a ventilation device operation panel 26 is provided on the side of the machine frame 23 of the mobile ventilation fan 20. By providing the ventilation device operation panel 26 on the machine frame 23, the ventilation device can be operated immediately after the mobile ventilation fan 20 is moved to the set work area, making work more efficient.

[0059] As shown in Figure 6, the ventilation device control panel 26 is equipped with a work area display 260, an operation confirmation display 261, a forward rotation operation button 262, a reverse rotation operation button 263, and a stop button 264, and can be operated for each of the first work areas A, B, and C.

[0060] The work area display 260 is a display for specifying the first work areas A, B, and C to operate the ventilation device.

[0061] The operation confirmation display 261 allows the operation of the movable ventilation fan 20 and the fixed ventilation fan 30 for each of the first working areas A, B, and C to be confirmed.

[0062] The operation confirmation indicator 261a lights up when the movable ventilation fan 20 is operating and goes out when the movable ventilation fan 20 is stopped. The operation confirmation indicator 261b lights up when the corresponding fixed ventilation fan 30 is operating and goes out when the corresponding fixed ventilation fan 30 is stopped. The operation confirmation indicator 261c lights up when there is an abnormality in the movable ventilation fan 20 or the corresponding fixed ventilation fan 30.

[0063] The forward rotation operation button 262 is a switch that rotates the movable ventilation fan 20 and also rotates the motor 302 and fan 303 of the fixed ventilation fan 30 corresponding to the movable ventilation fan 20 in one direction (forward rotation) for each of the first working areas A, B, and C.

[0064] The reverse rotation operation button 263 is a switch that rotates the movable ventilation fan 20 and also rotates (reverses) the motor 302 and fan 303 of the fixed ventilation fan 30 corresponding to the movable ventilation fan 20 in the other direction for each of the first working areas A, B, and C.

[0065] The stop button 264 is a switch for stopping the motor 302 and the fan 303 of the fixed ventilation fan 30 corresponding to the movable ventilation fan 20 for each of the first working areas A, B, and C.

[0066] As shown by the broken lines in FIG. 7, the movable ventilation fan 20 and the fixed ventilation fan 30 are electrically connected to a rotation control device 28 built into a ventilation device control panel 27 by control lines 32 and 33 . When the rotation control device 28 receives a forward rotation signal specifying the first work area from the ventilation device operation panel 26 by operating the forward rotation operation button 262 corresponding to the first work area A, B, C, it checks whether there are any abnormalities, and if there are no abnormalities, it operates the mobile ventilation fan 20 and rotates the fan 303 of the fixed ventilation fan 30 corresponding to the specified first work area in the forward direction, and lights up the operation confirmation indicators 261a and 261b. At this time, the movable ventilation fan 20 is oriented in the exhaust support direction, sending air toward the fixed ventilation fan 30, and the air supply from the movable ventilation fan 20 and the exhaust from the fixed ventilation fan 30 work together to exhaust organic gases generated in the first work area outside the building 1.

[0067] When the rotation control device 28 receives a reverse rotation signal specifying the first work area from the ventilation device operation panel 26 by operating the reverse rotation operation button 263 corresponding to the first work area A, B, C, it checks whether there are any abnormalities, and if there are no abnormalities, it operates the mobile ventilation fan 20 and reverses the rotation of the fan 303 of the fixed ventilation fan 30 corresponding to the specified first work area, and lights up the operation confirmation indicators 261a and 261b. At this time, the movable ventilation fan 20 is directed in the intake support direction (the opposite side of the first work area, for example, the side of the earth and sand pit 7) that draws air from the fixed ventilation fan 30 into the building 1, and the air supply from the movable ventilation fan 20 and the exhaust from the fixed ventilation fan 30 work together to supply air from outside the building 1 to the first work area.

[0068] Furthermore, if there is an abnormality in the movable ventilation fan 20 or the corresponding fixed ventilation fan 30, the operation confirmation display 261c is turned on without operating the movable ventilation fan 20 and the fixed ventilation fan 30. Instead of the control lines 32 and 33, a wireless system may be used.

[0069] 7 shows fixed ventilation fans 30a to 30f that are operated in correspondence with each first work area. Specifically, fixed ventilation fans 30a and 30b are operated in first work area A, fixed ventilation fans 30c and 30d are operated in first work area B, and fixed ventilation fans 30e and 30f are operated in first work area C. Such settings are set in rotation control device 28 in ventilation device control panel 27. In FIG. 7, the movable ventilation fan 20 when positioned in the first working areas A and C is shown by a broken line, and the movable ventilation fan 20 when positioned in the first working area B is shown by a solid line.

[0070] The operation and behavior of the ventilation device when the seal-pasting work is carried out in each of the first work areas A, B, and C will be described with reference to FIG. The sealing work is usually carried out during the daytime, with the opening 102 in the building 1 and the shutter 100 at the vehicle entrance / exit 1f open.

[0071] 8(A) shows the operating state of the ventilation system when sticker application work is being performed in the first work area A. After moving the movable ventilation fan 20 to the first work area A and orienting the air supply direction in the exhaust support direction, the forward rotation operation button 262 below the "A" on the work area display 260 of the ventilation system operation panel 26 is pressed to operate the movable ventilation fan 20 and rotate the fixed ventilation fans 30a and 30b in the forward direction.

[0072] Then, the organic gas generated in the first working area A is discharged to the outside of the building 1 by the exhaust of the fixed ventilation fans 30a and 30b and the exhaust support by the air supply of the mobile ventilation fan 20. Additionally, on the ventilation device operation panel 26, the operation confirmation indicators 261a and 261b located below the "A" in the work area indicator 260 light up. In FIG. 8(A), the stationary ventilation fans 30a and 30b that are in operation are shown hatched with diagonal lines.

[0073] Once the sticker application work in the first work area A is completed and ventilation is no longer necessary, press the stop button 264 below the "A" on the work area display 260 on the ventilation device control panel 26 to stop the movable ventilation fan 20 and the fixed ventilation fans 30a and 30b. On the ventilation device operation panel 26, the operation confirmation indicators 261a and 261b located below the "A" in the work area indicator 260 are turned off.

[0074] 8(B) shows the operating state of the ventilation system when sticker application work is being performed in first work area B. After moving the movable ventilation fan 20 to first work area B and orienting the air supply direction in the exhaust support direction, the forward rotation operation button 262 below the "B" on the work area display 260 of the ventilation system operation panel 26 is pressed to operate the movable ventilation fan 20 and rotate the fixed ventilation fans 30c and 30d forward.

[0075] Then, the organic gas generated in the first working area B is discharged to the outside of the building 1 by the exhaust of the fixed ventilation fans 30c and 30d and the exhaust support by the air supply of the mobile ventilation fan 20. Additionally, on the ventilation device operation panel 26, the operation confirmation indicators 261a and 261b located below the "B" in the work area indicator 260 light up. In FIG. 8(B), the stationary ventilation fans 30c and 30d that are in operation are shown hatched with diagonal lines.

[0076] Once the sticker application work in the first work area B is completed and ventilation is no longer necessary, press the stop button 264 below the "B" on the work area display 260 on the ventilation device control panel 26 to stop the movable ventilation fan 20 and the fixed ventilation fans 30c and 30d. On the ventilation device operation panel 26, the operation confirmation indicators 261a and 261b located below the "B" in the work area indicator 260 are turned off.

[0077] 8(C) shows the operating state of the ventilation system when sticker application work is being performed in the first work area C. After moving the movable ventilation fan 20 to the first work area C and orienting the air supply direction in the exhaust support direction, the forward rotation operation button 262 below the "C" on the work area display 260 of the ventilation system operation panel 26 is pressed to operate the movable ventilation fan 20 and rotate the fixed ventilation fans 30e and 30f in the forward direction.

[0078] Then, the organic gas generated in the first working area C is discharged to the outside of the building 1 by the exhaust of the fixed ventilation fans 30e and 30f and the exhaust support by the air supply of the mobile ventilation fan 20. Additionally, on the ventilation device operation panel 26, the operation confirmation indicators 261a and 261b located below the "C" in the work area indicator 260 light up. In FIG. 8(C), the stationary ventilation fans 30e and 30f that are in operation are shown hatched with diagonal lines.

[0079] Once the sticker application work in the first work area C is completed and ventilation is no longer necessary, press the stop button 264 below the "C" on the work area display 260 on the ventilation device control panel 26 to stop the movable ventilation fan 20 and the fixed ventilation fans 30e and 30f. On the ventilation device operation panel 26, the operation confirmation indicators 261a and 261b located below the "C" in the work area indicator 260 are turned off.

[0080] If the temperature inside the building 1 is high, spraying mist into the air from the nozzle 251 when the mobile ventilation fan 20 is operated can lower the temperature in the first working area.

[0081] By doing so, organic gases generated during the sealing work can be ventilated safely and efficiently. At this time, outside air flows into the building 1 through the vehicle entrance / exit section 1f with the shutter 100 open and the openings 102 formed in each side wall. Moreover, unnecessary fixed ventilation fans 30 are not operated, thereby saving labor.

[0082] During summer nights, the outside temperature is often lower than the temperature inside Building 1. Also, during nighttime shield construction work, sealing work is not usually carried out in segment stockyard 6, and excavation is often carried out underground. In such a situation, it is desirable to actively take in outside air into building 1 to lower the indoor temperature, without needing to discharge organic gases that accompany the sealing work.

[0083] In this case, the starting shaft opening 2 and the earth and sand pit 7, where work is carried out even at night, become the second work area to which air is supplied by the ventilation system.

[0084] 9 shows the ventilation system when outside air is drawn into the building 1 and sent to the second work area. At this time, because the work is being done at night, no excavated soil is being removed from the soil pit 7, and no equipment is being transported in or out, so the shutter 100 of the vehicle entrance / exit area 1f is closed.

[0085] The mobile ventilation fan 20 is placed on the left side of the first work area, near the second work area, which is the departure shaft opening 2 and the earth and sand pit 7 (to the left side of the first work area A); in other words, it is placed between the first work area and the second work area, and the air supply direction is directed in the direction of supplying air to the departure shaft opening 2 and the earth and sand pit 7, which is the intake support direction that draws air from the fixed ventilation fan 30 into the building 1.

[0086] Next, to operate the movable ventilation fan 20 and reverse the rotation of the fixed ventilation fans 30a, 30b or all of the fixed ventilation fans 30, press the reverse rotation operation button 263 below "A" and "B" on the work area display 260 of the ventilation device control panel 26, or the all reverse rotation operation button 263.

[0087] When the rotation control device 28 receives a reverse rotation signal specifying the first work area from the ventilation device operation panel 26 by operating the reverse rotation operation button 263 corresponding to the first work area A, B, C, it checks whether there are any abnormalities, and if there are no abnormalities, it operates the mobile ventilation fan 20 and reverses the rotation of the fan 303 of the fixed ventilation fan 30 corresponding to the specified first work area, and lights up the operation confirmation indicators 261a and 261b.

[0088] Then, outside air is drawn into the building 1 by the intake of the fixed ventilation fan 30 and the intake support of the mobile ventilation fan 20, and is sent toward the departure shaft opening 2 and the earth and sand pit 7.

[0089] The blades 3030 of the fan 303 of the fixed ventilation fan 30 are shaped so that the tip is tapered when rotating in one direction to exhaust air outside the building 1, and the tip is swollen when rotating in the other direction to draw air into the building 1; in other words, this shape is suited to forward rotation to exhaust air outside the building 1, so if the fan is rotated in the reverse direction to draw air, the air volume will be reduced to 50% to 80% of the exhaust air volume. However, with the intake assistance of the mobile ventilation fan 20, sufficient outside air can be efficiently sent to the second work area.

[0090] Air is sent into the working areas of the starting shaft opening 2 and the earth and sand pit 7, suppressing or lowering the temperature rise, thereby improving the temperature environment while ventilating. In addition, the air sent to the departure shaft opening 2 is sent into the tunnel by the air supply fan 200, which suppresses the temperature rise or lowers the temperature, thereby improving the temperature environment while ventilating.

[0091] The fixed ventilation fans 30a to 30f are installed at a position lower than the height of the stacked segment 4 pieces and lower than the center line 20L of the right side wall 1a, so that relatively low temperature outside air is taken in from a low position on the right side wall 1a, thereby efficiently improving the temperature environment inside the building 1.

[0092] At night, no vehicles are used to carry things in or out, so the shutter 100 of the vehicle entrance / exit section 1f of the building 1 is closed, and air currents that disrupt the air supply to the second work area are unlikely to occur.

[0093] By spraying mist into the air from the nozzle 3010 of the fixed ventilation fan 30 or spraying mist into the air from the nozzle 251 of the movable ventilation fan 20, the temperature of the air sent to the first working area and the second working area can be further reduced, thereby further improving the thermal environment.

[0094] The exhaust air from the starting shaft opening 2 is mainly discharged to the outside of the building 1 via an exhaust device 101 provided on the upper wall 1e. The air inside the building 1 is mainly discharged to the outside through the exhaust device 101 and the opening 102.

[0095] By pressing the stop button 264 on the ventilation device operation panel 26, the movable ventilation fan 20 and the fixed ventilation fan 30 can be stopped, and the intake of air from outside the building 1 can be stopped. On the ventilation device operation panel 26, the operation confirmation indicators 261a and 261b are turned off.

[0096] Second Embodiment A second embodiment of the present invention will be described below with reference to Fig. 10. Note that a description of the same parts as in the first embodiment will be omitted, and the differences will be mainly described.

[0097] In the first embodiment, work was carried out even at night, and the second work area to which air was supplied by the moving ventilation fan 20 of the ventilation device was the area related to work at the departure shaft opening 2 and the earth and sand pit 7, but in the second embodiment, it is different in that it is the area related to work at the earth and sand pit 7.

[0098] The mobile ventilation fan 20 is placed on the left side of the first work area, near the second work area, the earth and sand pit 7 (to the left of the first work area A), in other words, between the first work area and the second work area, with the air supply direction facing the direction of air supply to the earth and sand pit 7, which is the intake support direction for drawing air from the fixed ventilation fan 30 into the building 1.

[0099] Next, to operate the movable ventilation fan 20 and reverse the rotation of the fixed ventilation fan 30a or all the fixed ventilation fans 30, press the reverse rotation operation button 263 or the all reverse rotation operation button 263 located below the "A" on the work area display 260 of the ventilation device control panel 26.

[0100] When the rotation control device 28 receives a reverse rotation signal specifying the first work area from the ventilation device operation panel 26 by operating the reverse rotation operation button 263 corresponding to the first work area A, B, C, it checks whether there are any abnormalities, and if there are no abnormalities, it operates the mobile ventilation fan 20 and reverses the rotation of the fan 303 of the fixed ventilation fan 30 corresponding to the specified first work area, and lights up the operation confirmation indicators 261a and 261b.

[0101] Then, outside air is drawn into the building 1 by the intake of the fixed ventilation fan 30 and the intake support of the movable ventilation fan 20, and is sent towards the earth and sand pit 7.

[0102] Third Embodiment A third embodiment of the present invention will be described below with reference to Fig. 11. Note that a description of the same parts as the first and second embodiments will be omitted, and the following mainly focuses on the different parts.

[0103] In the second embodiment, work is carried out even at night, and the second work area to which air is supplied by the mobile ventilation fan 20 of the ventilation device is the area related to work in the earth and sand pit 7. However, in the third embodiment, it is different in that it is the area related to work at the departure shaft opening 2.

[0104] The mobile ventilation fan 20 is placed on the left side of the first work area, near the starting shaft opening 2, which is the second work area (on the left side of the middle part between the first work areas B and C), in other words, it is placed between the first work area and the second work area, and the air supply direction is directed in the direction of supplying air to the starting shaft opening 2, which is the intake support direction for drawing air from the fixed ventilation fan 30 into the building 1.

[0105] Next, to operate the movable ventilation fan 20 and reverse the rotation of the fixed ventilation fans 30b, 30c or all of the fixed ventilation fans 30, press the reverse rotation operation button 263 or the all reverse rotation operation button 263 located below "B" and "C" on the work area display 260 of the ventilation device control panel 26.

[0106] When the rotation control device 28 receives a reverse rotation signal specifying the first work area from the ventilation device operation panel 26 by operating the reverse rotation operation button 263 corresponding to the first work area A, B, C, it checks whether there are any abnormalities, and if there are no abnormalities, it operates the mobile ventilation fan 20 and reverses the rotation of the fan 303 of the fixed ventilation fan 30 corresponding to the specified first work area, and lights up the operation confirmation indicators 261a and 261b.

[0107] Then, outside air is drawn into the building 1 by the intake of the fixed ventilation fan 30 and the intake support of the movable ventilation fan 20, and is sent towards the starting shaft opening 2. The air sent to the departure shaft opening 2 is sent into the tunnel by an air supply fan 200.

[0108] In this way, priority is given to supplying air to the ventilation fan 200 at the departure shaft opening 2, which is particularly effective in suppressing or lowering the temperature rise inside the tunnel, improving the temperature environment while ventilating.

[0109] [Other Modifications] The present invention is not limited to the above-described embodiment, and may also include the following, for example.

[0110] In the embodiment of the present application, the sealing work has been described in terms of sealing work on segments in a shield construction method, but the present invention is not limited to this and may also be applied to work that generates organic gases, such as sealing work on thrust pipes in a thrust construction method.

[0111] In the embodiment of the present application, the first work area is set as the area for sealing work, and the second work area is set as the area for transporting excavated soil, transporting equipment and materials, and modifying excavated soil, but this is not limited to this, and either can be the first work area or the second work area.

[0112] For example, if the first work area is set to an area for the removal of excavated soil, the transport of equipment, and the modification of excavated soil, it is possible to properly ventilate exhaust gases, which are ventilated media during the removal of excavated soil and the transport of equipment, and dust from the modifying material, which is ventilated media during the modification of excavated soil. The backhoes and soil removal vehicles that load excavated soil from the soil pit into the soil removal vehicles are often mobile, and in such cases, it is effective to set this as the first work area of ​​the ventilation device of the present invention. Since exhaust gases are generally heavier than air, it is more effective to install fixed ventilation fans lower than mobile ventilation fans. Exhaust gases can rise and disperse due to the heat of the internal combustion engine. Furthermore, dust from the modifying agent produced during the modification of excavated soil can also rise and disperse as it is stirred up in the soil pit. Taking these factors into consideration, a similar fixed ventilation fan can be installed above the upper fixed ventilation fan 35 to provide multiple stages.

[0113] In the embodiment of the present application, water is supplied to the nozzles of the movable ventilation fan and the fixed ventilation fan to spray mist into the supplied air, but this is not necessarily required. Also, although the sprayed mist is water, it may be a liquid other than water.

[0114] In the embodiment of the present application, it is ideal to set the air volume in the first work area so that open push-pull ventilation is achieved, but this is not limited to this as long as the ventilated medium is within legal standards and does not interfere with work.

[0115] In the embodiment of the present application, the moving ventilation fan rotates a single four-blade rotary blade, but the present invention is not limited to this. Also, the moving ventilation fan may be of the same size as each first work area, or may span multiple first work areas.

[0116] In the embodiment of the present application, the ventilation device operation panel 26 and the ventilation device control panel 27 are provided separately, but this is not limiting and they may be configured as an integrated unit and provided with a mobile ventilation fan. Also, they may be configured as an integrated unit and installed inside the building. In the embodiment of the present application, the first work area is divided into three sections, but this is not limited thereto, and the first work areas may overlap each other. Also, in the embodiment of the present application, three first work areas are set so that one work area includes three rows of segments 4 in the front-to-rear direction within the building 1, but this is not limited thereto, and for example, the first work area may be set so that only one row of segments is included, i.e., nine first work areas. In this way, ventilation can be more tailored to the work being done.

[0117] In the embodiment of the present application, after the mobile ventilation fan is moved to each first work area, the forward rotation operation button is operated to operate the mobile ventilation fan and rotate the fixed ventilation fan in the forward direction to exhaust air outside the building, and the reverse rotation operation button is operated to operate the mobile ventilation fan and rotate the fixed ventilation fan in the reverse direction to draw air into the building, but this is not limited to this.

[0118] For example, the rotation control device built into the control panel may be provided with a rotation setting unit that rotates the fan of the fixed ventilation fan in one direction (forward rotation) when work is being performed in the first work area, and rotates the fan of the fixed ventilation fan in the other direction (reverse rotation) when work is not being performed in the first work area. An example of the rotation setting unit is a timer. A timer may be used to set the time to start work in the first work area during the day and the time to end work in the first work area at night, and the fixed ventilation fan may be rotated forward when work in the first work area starts and reverse when work ends. In other words, whether or not work is being done in the first work area may be automatically set based on the work time period. The portable ventilation fan may also be operated in conjunction with the timer.

[0119] Also, for example, during night work, the shutter 100 of the vehicle entrance / exit section 1f is often closed because no work is done to transport excavated soil from the soil pit 7 or to transport equipment and materials. Therefore, if the shutter 100 is closed for a predetermined period of time, it can be determined that night work is being performed, and the fan of the fixed ventilation fan can be controlled to rotate in the reverse direction, and if the shutter 100 is open for a predetermined period of time, it can be determined that daytime work is being performed, and the fan of the fixed ventilation fan can be controlled to rotate in the forward direction.

[0120] In this embodiment, the fixed ventilation fans 30a to 30f are installed at positions lower than the height of the stacked segments 4 and lower than the center line 20L of the right side wall 1a, but this is not limited to this. They are installed within a range that allows for the exhaust of the ventilated medium in the first working area by forward rotation and for the improvement of the temperature environment inside the building by reverse rotation. To improve the temperature environment, it is preferable to install the fixed ventilation fans at a position lower than about half the height of the side wall.

[0121] In this embodiment, the exhaust device 101 provided on the top wall 1e is a device that constantly exhausts air, but this is not limited to this. A ventilation opening that does not have a ventilation fan for natural ventilation, such as the opening 102 provided on the side wall, may also be used. In this case, when the fixed ventilation fan 30 is rotated forward to exhaust air, air can be drawn in through the top wall 1e of the building 1, resulting in Type 3 ventilation for the entire building. When the fixed ventilation fan 30 is rotated backward to draw air in, air can be drawn in through the top wall 1e of the building 1, resulting in Type 2 ventilation for the entire building. Controlling the rotation direction of the fixed ventilation fan 30 allows switching between Type 2 ventilation and Type 3 ventilation, making it possible to achieve efficient ventilation by taking advantage of the advantages of each.

[0122] Each technical matter in any of the embodiments including the modified examples may be applied to other embodiments to be used as examples. [Explanation of symbols]

[0123] 1 Building 2 Departure shaft opening 200 ventilation fan 3. Overhead crane 4 segments 5 Segment delivery vehicle 6 Segment Stockyard 7. Sediment Pit 8 Backhoe 9. Earth and sand removal vehicle 10 Additive equipment 11 Backfill injection equipment 12 Turbid water treatment equipment 13 Central control room 14 Material storage area 20 Portable ventilation fan 21 Main frame 21a Angle adjustment axis 21b Front Frame 22a Rotating blade 22b Rotation axis 23 Machine base frame 23a Wheel mounting part 24 wheels 25 Misting device 250 ring tube 251 nozzle 26 Ventilation control panel 260 Work area display 261 Operation confirmation display 262 Forward rotation operation button 263 Reverse rotation operation button 264 Stop Button 27 Ventilation control panel 28 Rotation control device 30 Fixed ventilation fan 300 support slots 301 Support pipe 3010 Nozzle 302 Motor 303 Fan 3030 Feather 304 Food 32, 33 control lines 100 shutter 101 Exhaust system 102 Opening

Claims

1. A ventilation device for ventilating a building having an upper wall, a side wall, and a work area, The working area includes a first working area adjacent to the side wall, a fixed ventilation fan fixed to a side wall adjacent to the first working area, having a rotating fan, and capable of rotating the fan in one direction to exhaust air to the outside of the building and in another direction opposite to the one direction to draw air into the building; a rotation direction control unit that rotates the fan of the fixed ventilation fan in either the one direction or the other direction; a movable ventilation fan that is disposed in the building at a position sandwiching the first working area between itself and the fixed ventilation fan, and that is movable and can change the air supply direction between an exhaust support direction in which air is sent toward the fixed ventilation fan and an intake support direction in which air is drawn from the fixed ventilation fan into the building. A ventilation device characterized by:

2. A ventilation device for ventilating a building having an upper wall, a side wall, and a work area, The working area includes a plurality of first working areas arranged adjacent to each other in a direction along the side wall, a plurality of fixed ventilation fans fixedly installed across the plurality of first work areas on side walls adjacent to the plurality of first work areas, the fixed ventilation fans having rotating fans that can be rotated in one direction to exhaust air to the outside of the building and in another direction opposite to the one direction to take air into the building; a rotation direction control unit that rotates the fan of the fixed ventilation fan in either the one direction or the other direction; a movable ventilation fan that is disposed within the building at a position sandwiching the first working area between itself and the fixed ventilation fan, that is movable within the building in a direction along the side wall on which the fixed ventilation fan is provided and across a plurality of first working areas, and that is capable of changing its air supply direction between an exhaust support direction in which air is sent toward the fixed ventilation fan and an intake support direction in which air is drawn from the fixed ventilation fan into the building A ventilation device characterized by:

3. The rotation direction control unit includes a rotation setting unit that rotates the fan of the fixed ventilation fan in the one direction when work is being performed in the first work area, and rotates the fan of the fixed ventilation fan in the other direction when work is not being performed in the first work area.

3. The ventilation device according to claim 1 or 2.

4. The working area further comprises a second working area; The second working area is disposed at a position in the air blowing direction of the movable ventilation fan when the air blowing direction of the movable ventilation fan becomes the intake assist direction.

3. The ventilation device according to claim 1 or 2.

5. The moving ventilation fan is provided with a nozzle for spraying mist into the supplied air.

3. The ventilation device according to claim 1 or 2.

6. The fixed ventilation fan is provided with a nozzle that sprays mist onto the air supplied from the fan to the building side.

3. The ventilation device according to claim 1 or 2.

7. The fixed ventilation fan is installed below half the height of the side wall.

3. The ventilation device according to claim 1 or 2,

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