US20180087261A1 - Blower and ventilating system - Google Patents

Blower and ventilating system Download PDF

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Publication number
US20180087261A1
US20180087261A1 US15/535,679 US201515535679A US2018087261A1 US 20180087261 A1 US20180087261 A1 US 20180087261A1 US 201515535679 A US201515535679 A US 201515535679A US 2018087261 A1 US2018087261 A1 US 2018087261A1
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US
United States
Prior art keywords
airflow
blower
manhole
generation means
frame
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US15/535,679
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English (en)
Inventor
Yukitoshi IWASA
Hiroshi Ogiwara
Takaaki ODATE
Hikaru Nakamura
Ryoji TERAI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EBISMARINE Corp
Tokyo Metropolitan Sewerage Service Corp
Ebistrade Inc
Original Assignee
EBISMARINE Corp
Tokyo Metropolitan Sewerage Service Corp
Ebistrade Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by EBISMARINE Corp, Tokyo Metropolitan Sewerage Service Corp, Ebistrade Inc filed Critical EBISMARINE Corp
Publication of US20180087261A1 publication Critical patent/US20180087261A1/en
Abandoned legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F5/00—Sewerage structures
    • E03F5/08—Ventilation of sewers
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
    • E21F1/08—Ventilation arrangements in connection with air ducts, e.g. arrangements for mounting ventilators

Definitions

  • the present invention relates to a blower and a ventilation system.
  • the present invention relates to a blower and a ventilation system preferably applied for ventilation in a structure, such as a pipe conduit, a pipe line or tunnel which is installed on and under the ground.
  • pipe conduit In a pipe conduit or a pipe line of sewerage (hereinafter, simply referred to as “pipe conduit”), when a manual work such as a maintenance and inspection is carried out, a worker generally enters from a manhole into a pipe conduit.
  • a worker In the pipe conduit, a worker may be in an oxygen deficiency state, and a poisonous gas such as hydrogen sulfide may be generated, and thus, it is needed to ensure safety management for a worker staying in the pipe conduit.
  • a poisonous gas such as hydrogen sulfide
  • Non Patent Literature 1 is a report on a safety in work within a sewer pipe conduit and provides recommendations and specific safety issues based on analysis of an accident case.
  • a method of ventilating inside pipe conduit is described in which “a fan is installed in consideration of a wind direction of an outer air, and the air is blown from one direction and the air is exhausted to outside from another direction thereby to carry out a ventilation in the pipe conduit.
  • the wind speed in the pipe conduit at this time should be over 0.8 m/second.”
  • the Literature illustrates an image of a cleaning work, and provides also an example of a fan and a duct by way of photo. According to the image of the cleaning work, ducts are inserted into both manholes at an air-blow side and an air-exhaust side, and the air is blown and exhausted by the fan connected to a ground surface side of each duct.
  • Patent Literature 1 discloses an air intake and exhaust device for a manhole and Patent Literature 2 discloses a ventilation device for an underground structure.
  • An object of the present invention is to provide a preferable blower installed on a manhole opening, with which it is possible to facilitate an entry or an exit of a worker or an import or an export of an article. Further, an object of the present invention is to provide a blower installable at an entrance and an exit without intersecting transportation of a structure such as a tunnel. Additionally, an object of the present invention is to provide a ventilation system using the blower in a pipe conduit or the structure such as the tunnel.
  • a blower comprising a frame and a single or a plurality of airflow generation means arranged at said frame, wherein a direction of an airflow is adjusted so that said airflow generated from said airflow generation means flows along with a virtual axis penetrating a virtual surface which said frame is regarded as periphery, and said airflow flows while swallowing up the surrounding air of said virtual axis, and an air volume more than two times of total fluid volume of said airflow is generated.
  • Said virtual axis vertically may intersect said virtual surface at a center point of the same.
  • Said plurality of airflow generation means may be arranged at said frame, and a direction of each airflows may be adjusted so that each airflow generated by said plurality of airflow generation means flows toward one point on said virtual axis.
  • Said plurality of airflow generation means may be arranged at a symmetric position having a center which is an intersection point of said virtual surface and said virtual axis.
  • a blower may comprise an installation tool for installing said airflow generation means on said frame, wherein said installation tool may include an angle adjustment mechanism for adjusting an angle of said airflow generation means against said virtual surface.
  • An incident angle of said airflow against said virtual surface may be preferable as 16 to 24 degrees.
  • Said airflow generation means may comprise a generation source of said airflow and injection nozzles for injecting said airflow, and said each injection nozzle may comprise a conical part for converging the airflow sent from said generation source, and a cylindrical part positioned at a top end of said conical part.
  • Said injection nozzle may comprise a direction adjustment mechanism for adjusting a direction of said airflow.
  • a blower may comprise a fixing tool for fixing said frame to the manhole opening.
  • a blower may comprise a blockage member for blocking a gap between a circumferential area of the manhole opening and said frame.
  • a blower may comprise an airflow reflection member which is installed at the manhole opening, is flexible member dropping to a lower part in the manhole, and converts a direction of airflow from a vertical direction to a horizontal direction.
  • a blower may comprises an additive supplying means for supplying one or more additives selected among an aromatic, water or steam to an air inflowed into said airflow generation means.
  • a ventilation system using the above-mentioned blower wherein said blower is installed in an entrance or an exit of a pipe conduit, a pipe line or a path, or at least one of an entrance, an exit or a manhole of a manhole connected to the pipe conduit or the pipe line, or the manhole.
  • a ventilation system may comprise an airflow direction conversion means for converting a direction of the airflow from a vertical direction to a horizontal direction, or from the horizontal direction to the vertical direction at an entrance or an exit to which said blower is installed, or at a bottom of the manhole.
  • Said airflow direction conversion means may be an airflow reflection plate for converting a direction by reflecting said airflow.
  • Said airflow direction conversion means may comprise a second airflow generation means for generating a second airflow different from the airflow from said blower, and said second airflow is joined in a different direction from the airflow from said blower and the direction of said airflow is converted.
  • An exhaust device may be installed on at least one of an entrance, an exit or a manhole which is different from an entrance, an exit or a manhole on which said blower is installed.
  • Said exhaust device may be preferably installed on a first entrance, exit or manhole which are located downstream relative to the entrance, the exit or the manhole on which said blower is installed.
  • the ventilation system may comprise an airflow direction conversion means for converting a direction of the airflow from a vertical direction to a horizontal direction, or from the horizontal direction to the vertical direction at an entrance, an exit or a bottom of a manhole to which said exhaust device is installed.
  • FIG. 1 is a cross-sectional view showing an example of a ventilation system of a sewer pipe conduit.
  • FIG. 2 is a cross-sectional view showing an example of a blower 140 arranged at a manhole opening.
  • FIG. 3 is a top view showing an example of a blower 140 arranged at a manhole opening.
  • FIG. 4 is a schematic view showing an example of an airflow generation means 144 .
  • FIG. 5 is a cross-sectional view showing another example of a ventilation system of a sewer pipe conduit.
  • FIG. 6 is a cross-sectional view showing a variation of a ventilation system 200 .
  • FIG. 7 is a cross-sectional view showing another variation of a ventilation system 200 .
  • FIG. 8 is a cross-sectional view showing yet another example of a ventilation system of a sewer pipe conduit.
  • FIG. 9 is a cross-sectional view showing still yet another example of a ventilation system of a sewer pipe conduit.
  • FIG. 10 is a cross-sectional view showing another example of a blower 140 arranged at a manhole opening.
  • FIG. 11 is a cross-sectional view showing yet another example of a ventilation system of a sewer pipe conduit.
  • FIG. 1 is a cross-sectional view showing an example of a ventilation system of a sewer pipe conduit.
  • a ventilation system 100 ventilates a pipe conduit 110 buried beneath a ground surface 102 .
  • the pipe conduit 110 is an underground space divided by a bottom 114 and a wall surface 112 , and includes a cross-sectional surface having a shape of a horseshoe.
  • a manhole 116 and a manhole 118 are arranged, and a worker is capable of entering the pipe conduit 110 through the manhole 116 or the manhole 118 .
  • description proceeds with a case where the pipe conduit 110 between the manhole 116 and the manhole 118 is ventilated.
  • the manhole 116 is at an air-blow side and the manhole 118 is at an air-exhaust side.
  • description proceeds with a case where the manhole 116 and the manhole 118 are adjacent to each other, however, the manhole 116 and the manhole 118 need not be adjacent to each other.
  • a shield curtain 120 may be arranged in the pipe conduit 110 . The shield curtain is efficient in ventilation.
  • a blower 140 is installed at an opening of the manhole 116 at the air-blow side, and an exhaust device 170 is installed at the manhole 118 at the air-exhaust side.
  • the exhaust device 170 is a conventional fan-type exhaust device, and a duct 172 connected to the exhaust device 170 is inserted into the manhole 118 .
  • the blower 140 may be installed at a plurality of manholes, and the exhaust device 170 may be installed at a plurality of manholes.
  • the manhole 118 is preferably the first manhole on downstream side of the manhole 116 .
  • FIG. 2 is a cross-sectional view showing an example of the blower 140 installed in a manhole opening 116 b
  • FIG. 3 is a top view thereof.
  • Reference numeral 116 a shows a manhole inner wall, and a worker can go in and out of the manhole 116 by using lifting metal fittings (not shown).
  • the blower 140 has a frame 143 and an airflow generation means 144 , and the plurality of airflow generation means 144 are arranged along the frame 143 .
  • the frame 143 is, for example, formed with metals, and has a ring-like shape.
  • the shape of the frame 143 is not limited.
  • An outer appearance of the frame 143 may have a ring-like or circular arc-like outer appearance corresponding to a shape of a manhole opening 116 b , however, it is not limited thereto.
  • the shape of the frame 143 may have a polygon, such as a triangle, a square, and a hexagon, an oval shape, and a shape of horseshoe.
  • the airflow generation means 144 generates an airflow 145 in the direction of the arrow as shown in figures.
  • a blower having an electric fan can be illustrated.
  • a DC fan can be illustrated.
  • the airflow generation means 144 is not limited to the electric fan or the DC fan, and has only to generate the airflow.
  • FIG. 4 is a schematic view showing an example of the airflow generation means 144 .
  • the airflow generation means 144 for example, comprises a generation source of the airflow and an injection nozzle for injecting the airflow.
  • the DC fan 144 a can be illustrated, and the airflow is sent from an outgoing port 114 b of the DC fan 144 a .
  • the injection nozzle comprises a conical part 144 c for converging the airflow sent from the outgoing port 114 b and a cylindrical part 144 d placed at end part of the conical part 144 c . Owing to the cylindrical part 144 d , a wind speed of the airflow is maintained and turbulence of the airflow is suppressed.
  • a direction of airflow 145 is adjusted so that the airflow 145 generated by the airflow generation means 144 flows along with a virtual axis 147 penetrating a virtual surface 146 which the frame 143 is regarded as periphery.
  • the virtual axis 147 is a center line for vertically penetrating a center of the virtual surface 146 which the frame 143 is regarded as periphery.
  • the airflow 145 flows while swallowing up the surrounding air of the virtual axis 147 , and there is generated an air volume more than two times of total fluid volume of the airflow 145 .
  • the airflow generation means 144 is installed at the frame 143 by an installation tool 148 .
  • the installation tool 148 may include an angle adjustment mechanism for adjusting the angle of the airflow generation means 144 relative to a disk surface of the frame 143 (the virtual surface 146 which the frame 143 is regarded as periphery).
  • An installation angle of the airflow generation means 144 is adjusted by the angle adjustment mechanism and each of the plurality of airflow generation means 144 can be arranged toward one point on a normal line (the virtual axis 147 ) positioned to the center of the disk surface of the frame 143 .
  • the airflow generation means 144 may comprise the injection nozzle for injecting the airflow, and the injection nozzle may adjust the direction of the airflow 145 .
  • the installation tool 148 may include a clamp part for clamping the frame 143 .
  • the clamp part makes the airflow generation means 144 detachable from the frame 143 and the angle of the airflow generation means 144 adjustable.
  • the installation tool 148 includes the clamp part, the airflow generation means 144 becomes detachable from the frame 143 , and therefore, the frames 143 having various sizes of diameters corresponding to the manholes having various sizes of opening diameters are prepared, and the frame 143 appropriate for the opening diameter of the manhole is selected and the airflow generation means 144 is attached by the clamp part to the selected frame 143 .
  • the number of airflow generation means 144 is four, and the four airflow generation means 144 are arranged at equal intervals along the frame 143 .
  • the number of airflow generation means 144 is not limited to four, and at least two or more airflow generation means may suffice. However, in consideration of efficiency of air blow, the number of airflow generation means 144 is preferably more than three. The more the airflow generation means, the better the efficiency of the air blow, however, an unnecessary large number of airflow generation means may result in a cost increase. Therefore, the number of airflow generation means 144 is preferably decided on the basis of the balance between the air-blow efficiency and the cost.
  • the plurality of airflow generation means 144 is preferably disposed on a symmetric position having a center which is an intersection point of the virtual surface 146 and the virtual axis 147 .
  • the frame 143 may be configured by a plurality of members. In this case, when transported, the frame 143 may be separate in a plurality of members. The frame 143 may be folded so that the plurality of members are piled each other. Furthermore, a fixing tool for fixing the frame 143 at the manhole opening 116 b may be included. When the blower 140 is fixed at the manhole opening, it is possible to increase the safety level.
  • Table 1 shows a result of an experience by measuring an air volume, where a blower 140 is installed at one end of a pipe having an inner diameter of 600 mm and a length of 2 m, and at another end of the pipe, the air volume is measured.
  • Experimental examples Nos. 1 to 6 are cases that the blower 140 is applied, and a comparative example No. 1 is a case that the conventional fan and duct are applied.
  • the airflow generation means 144 is an electric blower having a discharge diameter of 24 mm.
  • Total air volume at the discharge port (discharge air volume) of the electric blower is equal to a total volume of the airflow 145 at the blower 140 and is shown in Table 1.
  • the air volume (pipe exit air volume) at another end (exit) of the pipe is, as shown in Table 1, more than two times of the discharge air volume (total volume of the airflow 145 ) in the experimental examples Nos. 1 to 6, and multiplication constant (pipe exit air volume/discharge air volume) becomes larger within a range of 13.8 to 27.9. This is because the airflow 145 is adjusted so as to flow along with the virtual axis, while swallowing up the surrounding air of the virtual axis. As a result, a large volume of air more than the total volume of the airflow 145 is sent out.
  • multiplication constant is equal to 1.6, and effect such in the present invention has not been found.
  • a length of nozzle of the airflow generation means was changed within a range of 100 mm to 300 mm, and diameters of the nozzles were changed within a range of 30 mm to 50 mm.
  • the maximum discharge wind speed 27 m/s is obtained when the length of the nozzle is 100 mm and the diameter of the nozzle is 100 mm.
  • the length of the nozzle is 100 mm and the diameter of the nozzle is 40 mm, turbulence of the airflow at the discharge port of the nozzle became large.
  • a nozzle was prepared which has a length of a conical part of 100 mm, a length of a cylindrical part of 50 mm, and a shape of a cylinder is added to a top end of the cone. This nozzle maintains the maximum wind speed 27 m/s at the discharge port and turbulence of the airflow was not found.
  • Table 2 shows a result of an experience by measuring an average wind speed and air volume, where two airflow generation means 144 are installed with different angles at one end of a pipe having an inner diameter of 600 mm and a length of 2 m, and at another end of the pipe, the average wind speed and the air volume are measured.
  • Preferable air quantities are obtained in experimental examples No. 8 (focal position being 0.70 m) to No. 11 (focal position being 1.00 m).
  • a range of the focal position falls within 167 to 23.2 degrees of an incident angle against a cross-section of the pipe of the airflow discharged from the nozzle. It becomes apparent that preferable pipe exit air volume can be obtained when the angle against the cross-section of the pipe of the nozzle becomes 16 to 24 degrees.
  • Table 3 shows a result of an experience by measuring an average wind speed and air volume, where the number and arrangement of airflow generation means 144 of the Example 2, and an output of a a generation source of the airflow (the discharge wind speed) are changed, and at another end of the pipe, the average wind speed and the air volume are measured.
  • item of “an arrangement of nozzles” means a position of each nozzle on the frame 143 of the airflow generation means 144 .
  • the airflow generation means 144 are arranged in a manner of three-fold symmetry, four-fold symmetry and six-fold symmetry against each of the virtual axis 147 .
  • experimental examples 16, 18 and 20 show experimental examples having axial symmetry lower than that of the experimental examples 15, 17 and 19.
  • An angle (only an acute angle) made by each airflow generation means 144 becomes 30 degrees in the experimental example 16, 40 degrees in the experimental example 18, and 40 and 50 degrees in experimental example 20.
  • Nozzle arrangement of the experimental examples 21 and 23 is equal to that of the experimental examples 18 and 20.
  • An angle (only an acute angle) made by each airflow generation means 144 of the experimental example 22 becomes 73 degrees.
  • the nozzle arrangement of the experimental example 22 is preferable due to no difficulty to hold the frame 143 .
  • the nozzle arrangement of the experimental example 22 may be applied, taking ease of moving up and down of the worker into consideration, rather than priority of the symmetry of the nozzle arrangement.
  • the blower 140 of the present ventilation system 100 is different from the conventional fan-type blower and does not need a flexible duct. Thus, it is possible to make the blower smaller in size. Further, in the blower 140 of the present invention, the manhole opening is not blocked as the conventional blower, so that an entry or an exit of a worker and an import or an export of an article are facilitated, and it is not necessary to stop the operation of the blower 140 during importation or exportation. Moreover, it is possible to ensure an escape route in emergency, and possible to further increase the safety of a worker.
  • FIG. 5 is a cross-sectional view showing another example of the ventilation system of the sewer pipe conduit.
  • an airflow reflection plate 202 for converting a direction of airflow from a vertical direction to a horizontal direction or from a horizontal direction to a vertical direction is installed at a bottom of either one or both of the manhole 116 in which the blower 140 is installed and the manhole 118 in which the exhaust device 170 is installed.
  • Such an airflow reflection plate 202 regulates a flow of air and reduces energy loss of an airflow generated when the direction of the flow of air is changed to achieve a more smooth flow, and as a result of which it is possible to increase the flow speed and the air volume in the pipe conduit 110 .
  • a second airflow generation means 204 may be used as the airflow direction converting means.
  • a normal fan-type blower can be illustrated.
  • the second airflow generation means 204 generates a second airflow 206 different from the airflow from the blower 140 , and the second airflow 206 is joined from a direction different from that of the airflow from the blower. The direction of the airflow is converted thereby.
  • FIG. 7 instead of the second airflow generation means 204 , the same means as the airflow generation means 144 may be used.
  • FIG. 8 is a cross-sectional view showing yet another example of a ventilation system of a sewer pipe conduit.
  • the blower 140 of the present invention is installed at the manhole 116 at the air-blow side, and in addition, a blower 340 equivalent to the blower 140 of the present invention is installed at the manhole 118 at the air-exhaust side.
  • the blower 340 of the present invention is installed also at the manhole 118 at the air-exhaust side, so that exhaust performance is improved, an entry or an exit of a worker and an import or an export of an article are further facilitated, and it is possible to further increase the safety of a worker while ensuring a plurality of escape routes in emergency.
  • FIG. 9 is a cross-sectional view showing still yet another example of a ventilation system of a sewer pipe conduit.
  • a ventilation system 400 shown in FIG. 9 is provided with a booster 402 in the pipe conduit 110 .
  • a blower equivalent to the blowers 140 and 340 is provided in the booster 402 .
  • the booster 402 generates the airflow in a direction to accelerate a flow in the pipe conduit 110 .
  • the airflow in the pipe conduit 110 is bolstered by the booster 402 , and thus, it is possible to further increase the safety of a worker.
  • the blower 340 may be installed at the manhole 118 at the air-exhaust side as in the ventilation system 300 .
  • the airflow generation means 144 having a cylindrical flow channel is arranged discontinuously along the frame 143 ; however, an opening of the nozzle may be arranged sequentially or continuously along the frame.
  • a nozzle having a slit-like opening is adopted, an air is supplied to a flow channel connected to the slit-like opening, the air is emitted in a normal direction of a disk surface of which the circumference is a frame, and the air is emitted while swallowing up the surrounding air.
  • the airflow may be generated in the normal direction of the disk surface.
  • the slit-like nozzle in this case may be formed with an opening continuously all across the entire frame, and in a slit-like nozzle having an opening with an appropriate length, the opening may be arranged continuously along the frame.
  • a blockage member 502 and the frame 143 having a diameter smaller than the diameter of the manhole opening 116 b may be applied to the manhole 116 having a larger opening.
  • the blockage member 502 is to block a gap between a circumferential area of the manhole opening 116 b and the frame 143 , and is capable of making the frame 143 suitable for the manhole opening 116 b having a larger diameter.
  • the blower 140 may include an airflow reflection member 602 .
  • the airflow reflection member 602 is a flexible member such as nylon, for example, and converts the direction of air flow from a vertical direction to a horizontal direction.
  • the airflow reflection member 602 installed on the manhole opening 116 b is dropped, by a rope member 604 , for example, to a lower part in the manhole 116 .
  • the airflow reflection member 602 and the rope member 604 can be stored in a compact manner, and convenient to simply expand by being installed at the manhole opening 116 b and then dropped, hence convenient.
  • an additive supplying means for supplying the one or more additives selected among an aromatic, water or steam to an air inflowed into the airflow generation means 144 .
  • the additive supplying means it has only to put the aromatic, the water or the steam at the entrance of airflow.
  • the aromatic By supplying the aromatic, it is possible to inform a worker working in the pipe conduit 110 that the air is normally supplied. Furthermore, by supplying the water and the steam, it is possible to protect the worker working in the pipe conduit 110 from drying.
  • blower and the ventilation system are applied to mainly the manhole and the underground pipe conduit, however, it is not necessary the pipe conduit arranged underground, and the present invention is applied to the pipe conduit and a pipe line installed on the ground.
  • the above-described blower and ventilation system can be applied to the structure which should not intersect the traffic at the entrance and the exit of the tunnel.
  • the blower and the ventilation system according to the present invention are applied to the tunnel, it is not necessary to install an additional blower on the ceiling for ventilation and the structure of the tunnel can be made small and cost for construction can be suppressed.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Water Supply & Treatment (AREA)
  • Health & Medical Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Ventilation (AREA)
  • Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
US15/535,679 2014-12-13 2015-12-08 Blower and ventilating system Abandoned US20180087261A1 (en)

Applications Claiming Priority (3)

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JP2014-252550 2014-12-13
JP2014252550A JP6571931B2 (ja) 2014-12-13 2014-12-13 送風機および換気システム
PCT/JP2015/084408 WO2016093234A1 (ja) 2014-12-13 2015-12-08 送風機および換気システム

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EP (1) EP3235964A4 (ja)
JP (1) JP6571931B2 (ja)
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JP2018031129A (ja) * 2016-08-22 2018-03-01 住友金属鉱山株式会社 坑内空調支援システム
CN107023065A (zh) * 2017-05-02 2017-08-08 陆彬燕 一种市政管道用新型通风装置

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JPS5248313B2 (ja) * 1972-06-30 1977-12-08
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JPS5939600B2 (ja) * 1979-04-05 1984-09-25 古河電気工業株式会社 洞道の換気方法
JP2731145B2 (ja) * 1987-02-07 1998-03-25 西村電機株式会社 吸引装置
JPH0419400A (ja) * 1990-05-11 1992-01-23 Hisamoto Suzuki 送風装置
JP3013686B2 (ja) * 1993-02-17 2000-02-28 三菱電機株式会社 送風機
JPH0894139A (ja) * 1994-09-21 1996-04-12 Matsushita Seiko Co Ltd 誘引換気装置
JPH0989344A (ja) * 1995-09-25 1997-04-04 Mitsubishi Electric Corp 送風機
JP2000104966A (ja) 1998-09-29 2000-04-11 Yoshida Komuten:Kk マンホール用給排気装置
JP2003328378A (ja) 2002-05-14 2003-11-19 Kantool Giken Kk 地下構造物用換気装置
JP5829282B2 (ja) * 2011-10-13 2015-12-09 東京都下水道サービス株式会社 送風機および換気システム
JP6208446B2 (ja) * 2013-03-27 2017-10-04 東京都下水道サービス株式会社 送風機支持体および換気システム
TWM485966U (zh) * 2014-01-16 2014-09-11 Jinwefon Electric Co Ltd 風扇結構

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US20210071405A1 (en) 2021-03-11
JP2016113798A (ja) 2016-06-23
TW201641787A (zh) 2016-12-01
JP6571931B2 (ja) 2019-09-04
TWI649484B (zh) 2019-02-01
WO2016093234A1 (ja) 2016-06-16
KR102434585B1 (ko) 2022-08-19
KR20180015108A (ko) 2018-02-12
EP3235964A1 (en) 2017-10-25
EP3235964A4 (en) 2018-10-10

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