CN111457534A - Ventilation device for building factory building - Google Patents

Ventilation device for building factory building Download PDF

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Publication number
CN111457534A
CN111457534A CN202010381684.XA CN202010381684A CN111457534A CN 111457534 A CN111457534 A CN 111457534A CN 202010381684 A CN202010381684 A CN 202010381684A CN 111457534 A CN111457534 A CN 111457534A
Authority
CN
China
Prior art keywords
box
air
pipe
plate
building
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.)
Withdrawn
Application number
CN202010381684.XA
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Chinese (zh)
Inventor
潘俐
夏冬
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.)
Hangzhou Manjing Technology Co ltd
Original Assignee
Hangzhou Manjing Technology Co ltd
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 Hangzhou Manjing Technology Co ltd filed Critical Hangzhou Manjing Technology Co ltd
Priority to CN202010381684.XA priority Critical patent/CN111457534A/en
Priority to CN201811365931.6A priority patent/CN109442661B/en
Publication of CN111457534A publication Critical patent/CN111457534A/en
Withdrawn legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00Ventilation
    • F24F7/04Ventilation with ducting systems also by double walls; with natural circulation
    • F24F7/06Ventilation with ducting systems also by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D29/00Other filters with filtering elements stationary during filtration, e.g. pressure or suction filters, or filtering elements therefor
    • B01D29/62Regenerating the filter material in the filter
    • B01D29/64Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element
    • B01D29/6407Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element brushes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/28Arrangement or mounting of filters
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F6/00Air-humidification, e.g. cooling by humidification
    • F24F6/12Air-humidification, e.g. cooling by humidification by forming water dispersions in the air

Abstract

The invention discloses a ventilation device for a building factory building, which comprises a box body and a filter vat, wherein the left side of the box body is fixedly connected with a wall body, the bottom of the left side of the wall body is fixedly connected with an air inlet pipe, one end of the air inlet pipe penetrates through the box body and extends into the box body, the other end of the air inlet pipe is communicated with an air collecting hopper, and one side, far away from the air inlet pipe, of the air collecting hopper is fixedly connected with a fixing frame. This building factory building ventilation unit, keep away from the fixed frame of one side fixedly connected with of air-supply line through collection wind fill, the brush can utilize the rotation of exhaust fan to clear up the blade of exhaust fan, thereby avoid the problem of the performance decline that the exhaust fan accumulation dust leads to, the clearance dynamics to the exhaust fan blade has been improved, through the bottom fixedly connected with bottom plate between the box inner wall both sides, filter the air of inhaling, reduce the content of dust in the air, then in will purifying the air escape the factory building again, the circulation of air in the factory building has been improved.

Description

Ventilation device for building factory building
Technical Field
The invention relates to the technical field of building construction, in particular to a ventilating device for a building workshop.
Background
In a broad sense, the architecture is a subject for researching architecture and environment thereof, the architecture is a subject spanning engineering technology and human art, the architectural art and the architectural technology related to the architecture and the aesthetic and practical faces included in the architectural art as practical art, although the components of the architecture are clearly different and closely related, and the components of the architecture are greatly different according to specific conditions and different buildings, ventilation is a technology which adopts natural or mechanical methods to ensure that wind does not block and can pass through a room or a sealed environment to cause the air environment suitable for sanitation, safety and the like, normal ventilation can improve the quality of indoor air and is beneficial to health, the architectural ventilation is divided into natural ventilation and mechanical ventilation, namely that dirty air in the room of the architecture is directly or after being purified and discharged to the outside, and then fresh air is supplemented, so that the indoor air environment is kept in accordance with the sanitation standard, ① ensures that indoor pollutants are removed, ② ensures the heat comfort of indoor personnel, and ③ meets the requirement of the fresh air for the indoor personnel.
Most of the existing building ventilation devices adopt fans to exhaust and ventilate air indoors, so that the purposes of replacing air and injecting fresh air are achieved; and can accumulate more dust on the fan uses the back blade for a long time to can influence the effect of airing exhaust, the ventilation of fan, and the ventilation shaft is responsible for interior dust and is difficult for handling, can influence the indoor environment after accumulating for a long time, has more dust in the middle of the air of discharging moreover, can cause certain influence to the environment, is unfavorable for the protection of environment.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a ventilating device for a building workshop, which solves the problems that more dust is easily accumulated on a fan blade, the normal use is influenced, and more dust is contained in the discharged air.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a ventilation device for a building factory building comprises a box body and a filter vat, wherein a wall body is fixedly connected to the left side of the box body, an air inlet pipe is fixedly connected to the bottom of the left side of the wall body, one end of the air inlet pipe penetrates through the box body and extends into the box body, an air collecting hopper is communicated with the other end of the air inlet pipe, a fixing frame is fixedly connected to one side, far away from the air inlet pipe, of the air collecting hopper, a fixing plate is fixedly connected between the top and the bottom of one side, far away from the air collecting hopper, of the fixing frame, a fixing rod is rotatably connected to one side, close to the air collecting hopper, of the fixing plate, hairbrushes are fixedly connected to the top and the bottom of the surface of the fixing rod, sliding plates are fixedly connected to the top and the bottom of the inner wall of the fixing frame, sliding plates are slidably connected to, and the back of exhaust fan inner wall is connected with the pivot through the motor rotation, the equal fixedly connected with lug in both sides of pivot inner wall to the spout with lug looks adaptation is all seted up with the back to the front on fixed rod surface, the fixed surface of pivot is connected with the flabellum.
Preferably, the top and the equal fixedly connected with backup pad in bottom of fixed frame inner wall to the equal fixedly connected with hydraulic telescoping rod in one side of two backup pads, hydraulic telescoping rod's output shaft and one side fixed connection of connecting plate.
Preferably, the bottom fixedly connected with bottom plate between box inner wall both sides to the both sides of filter vat are communicated with first sleeve and second sleeve respectively, one side fixedly connected with riser at bottom plate top to first telescopic surface is connected with the inside rotation of riser, first telescopic one end intercommunication has bent type pipe, bent type pipe is kept away from first telescopic one end and is run through the bottom plate and extend to the bottom of bottom plate, bent type pipe extends to the one end fixedly connected with suction nozzle of bottom plate bottom to the bottom fixedly connected with support of box one side.
Preferably, the one end of second sleeve runs through the box and extends to the outside of box, the second sleeve extends to the first belt pulley of the fixed surface of the outside one end of box to the first motor of top fixedly connected with of support, the one end fixedly connected with second belt pulley of first motor output shaft to connect through belt drive between the surface of first belt pulley and second belt pulley.
Preferably, fixedly connected with baffle just above the filter vat between the both sides of box inner wall, the middle part of baffle rotates and is connected with the standpipe to the first bevel gear of top fixedly connected with on standpipe surface, one side fixedly connected with second motor at baffle top to the second bevel gear of the first bevel gear of one end fixedly connected with of second motor output shaft engaged with, the opposite side fixedly connected with air exhauster at baffle top, between the both sides of box inner wall and be located the baffle just above fixedly connected with roof, the bottom fixedly connected with purifying plate of standpipe.
Preferably, the one end intercommunication of air exhauster air intake has the exhaust column to the one end that the exhaust column was kept away from the air exhauster is linked together with the top of standpipe, the one end intercommunication of air exhauster air outlet has the exhaust pipe, the one end of exhaust pipe runs through the roof and extends to the top of roof, the exhaust pipe extends to the first shower nozzle of one end fixedly connected with at roof top.
Preferably, the top fixedly connected with water tank of box one side to the bottom fixedly connected with water pump of water tank inner wall, one side intercommunication at water tank top has the inlet tube to the delivery port intercommunication of water pump has the outlet pipe, the one end of outlet pipe runs through the box and extends to the inside of box, the one end intercommunication that the outlet pipe extends to the inside of box has violently the pipe to violently manage the bottom fixedly connected with second shower nozzle on pipe surface, the top intercommunication of box has the pipe, the one end of pipe runs through the wall body and extends to the inside of wall body.
Preferably, the bottom of the box body is fixedly connected with a base, one side of the base is fixedly connected with one side of the wall body, and two sides of the surface of the box body are hinged with box doors through hinges.
(III) advantageous effects
The invention provides a ventilating device for a building workshop. Compared with the prior art, the method has the following beneficial effects:
(1) the ventilating device of the building factory building is characterized in that a fixing frame is fixedly connected to one side of an air collecting hopper far away from an air inlet pipe, a fixing plate is fixedly connected between the top and the bottom of one side of the fixing frame far away from the air collecting hopper, a fixing rod is rotatably connected to one side of the fixing plate close to the air collecting hopper, brushes are fixedly connected to the top and the bottom of the surface of the fixing rod, sliding plates are fixedly connected to the top and the bottom of the inner wall of the fixing frame, sliding blocks are slidably connected to the opposite sides of the two sliding plates, connecting plates are fixedly connected to the opposite sides of the two sliding blocks, an exhaust fan is fixedly connected between the opposite sides of the two connecting plates, a rotating shaft is rotatably connected to the back of the inner wall of the exhaust fan through a motor, bumps are fixedly connected to the two sides of the inner wall of the, the brush can utilize the rotation of exhaust fan to clear up the blade of exhaust fan to avoid the problem of the performance degradation that the exhaust fan accumulation dust leads to, improved the clearance dynamics to the exhaust fan blade.
(2) This building factory building ventilation unit, bottom fixedly connected with bottom plate through between the box inner wall both sides, and the both sides of filter vat communicate respectively has first sleeve and second sleeve, one side fixedly connected with riser at bottom plate top, and first telescopic surface is connected with the inside rotation of riser, first telescopic one end intercommunication has bent type pipe, first telescopic one end runs through the bottom of bottom plate and extension to bottom plate is kept away from to bent type pipe, bent type pipe extends to the one end fixedly connected with suction nozzle of bottom plate bottom, and the bottom fixedly connected with support of box one side, filter the air of inhaling, reduce the content of dust in the air, then in will purifying the air row factory building again, the circulation of air in the factory building has been improved.
(3) This building factory building ventilation unit, top fixedly connected with water tank through box one side, and the bottom fixedly connected with water pump of water tank inner wall, one side intercommunication at water tank top has the inlet tube, and the delivery port intercommunication of water pump has the outlet pipe, the one end of outlet pipe runs through the box and extends to the inside of box, the one end intercommunication that the outlet pipe extends to the box inside has violently the pipe, and violently manage the bottom fixedly connected with second shower nozzle on surperficial, the top intercommunication of box has the pipe, the one end of pipe runs through the wall body and extends to the inside of wall body, utilize the form of water spray, improve the degree of wetness of air, also can reduce the dust in the air simultaneously, the protection dynamics to the environment has been improved.
Drawings
FIG. 1 is a front view of the structure of the present invention;
FIG. 2 is a cross-sectional view of the tank and tank arrangement of the present invention;
figure 3 is a sectional view of the fixed frame structure of the invention;
FIG. 4 is a side view of the fan structure of the present invention;
fig. 5 is a partial enlarged view of the invention at a in fig. 2.
In the figure, 1 box body, 2 filter vat, 3 wall, 4 blast pipe, 5 wind collecting hopper, 6 fixing frame, 7 fixing plate, 8 fixing rod, 9 brush, 10 slide plate, 11 slide block, 12 connecting plate, 13 exhaust fan, 14 rotating shaft, 15 convex block, 16 slide groove, 17 fan blade, 18 supporting plate, 19 hydraulic telescopic rod, 20 bottom plate, 21 first sleeve, 22 second sleeve, 23 vertical plate, 24 curved pipe, 25 suction nozzle, 26 support, 27 first belt pulley, 28 first motor, 29 second belt pulley, 30 partition board, 31 vertical pipe, 32 first bevel gear, 33 second motor, 34 second bevel gear, 35 exhaust fan, 36 top plate, 37 exhaust pipe, 38 exhaust pipe, 39 first nozzle, 40 water tank, 41 water pump, 42 water inlet pipe, 43 water outlet pipe, 44 horizontal pipe, 45 second nozzle, 46 conduit, 47 base, 48 box door, 49 purifying plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, an embodiment of the present invention provides a technical solution: a ventilation device for a building factory building comprises a box body 1 and a filter barrel 2, wherein the sucked air is filtered to reduce the content of dust in the air, then the purified air is discharged into the factory building, the circulation of the air in the factory building is improved, a bottom plate 20 is fixedly connected to the bottom between two sides of the inner wall of the box body 1, two sides of the filter barrel 2 are respectively communicated with a first sleeve 21 and a second sleeve 22, one end of the second sleeve 22 penetrates through the box body 1 and extends to the outside of the box body 1, a first belt pulley 27 is fixedly connected to the surface of one end, extending to the outside of the box body 1, of the second sleeve 22, a first motor 28 is fixedly connected to the top of a support 26, a second belt pulley 29 is fixedly connected to one end of an output shaft of the first motor 28, the surfaces of the first belt pulley 27 and the second belt pulley 29 are in transmission connection through a belt, a vertical plate 23 is fixedly connected to one, the surface of the first sleeve 21 is rotatably connected with the inside of the vertical plate 23, one end of the first sleeve 21 is communicated with a curved pipe 24, one end of the curved pipe 24, which is far away from the first sleeve 21, penetrates through the bottom plate 20 and extends to the bottom of the bottom plate 20, one end of the curved pipe 24, which extends to the bottom of the bottom plate 20, is fixedly connected with a suction nozzle 25, the bottom of one side of the box body 1 is fixedly connected with a support 26, a partition plate 30 is fixedly connected between two sides of the inner wall of the box body 1 and is positioned right above the filter barrel 2, the middle part of the partition plate 30 is rotatably connected with a vertical pipe 31, the top of the surface of the vertical pipe 31 is fixedly connected with a first bevel gear 32, one side of the top of the partition plate 30 is fixedly connected with a second motor 33, one end of an output shaft of the second motor 33 is fixedly connected with a second bevel gear 34 engaged, and the end of the exhaust pipe 37 far away from the exhaust fan 35 is communicated with the top end of the vertical pipe 31, the end of the exhaust fan 35 at the air outlet is communicated with an exhaust pipe 38, one end of the exhaust pipe 38 penetrates through the top plate 36 and extends to the top of the top plate 36, one end of the exhaust pipe 38 extending to the top of the top plate 36 is fixedly connected with a first spray nozzle 39, the top plate 36 is fixedly connected between two sides of the inner wall of the box body 1 and is positioned right above the partition plate 30, the bottom end of the vertical pipe 31 is fixedly connected with a purification plate 49, the top of one side of the box body 1 is fixedly connected with a water tank 40, the bottom of the inner wall of the water tank 40 is fixedly connected with a water pump 41, one side of the top of the water tank 40 is communicated with a water inlet pipe 42, the water outlet of the water pump 41 is communicated with a water outlet pipe 43, one end of the water, the humidity of air is improved by using a water spraying mode, dust in the air can be reduced, and the environment protection is improved, the top of the box body 1 is communicated with a conduit 46, one end of the conduit 46 penetrates through the wall body 3 and extends into the wall body 3, the bottom of the box body 1 is fixedly connected with a base 47, one side of the base 47 is fixedly connected with one side of the wall body 3, two sides of the surface of the box body 1 are hinged with box doors 48 through hinges, the left side of the box body 1 is fixedly connected with the wall body 3, the bottom of the left side of the wall body 3 is fixedly connected with an air inlet pipe 4, one end of the air inlet pipe 4 penetrates through the box body 1 and extends into the box body 1, the other end of the air inlet pipe 4 is communicated with an air collecting hopper 5, one side of the air collecting hopper 5, which is far away from the air inlet pipe 4, is fixedly connected with a fixed frame 6, the top and the bottom of the, an output shaft of a hydraulic telescopic rod 19 is fixedly connected with one side of a connecting plate 12, a fixed plate 7 is fixedly connected between the top and the bottom of one side of the fixed frame 6, which is far away from the wind collecting hopper 5, and one side of the fixed plate 7, which is close to the wind collecting hopper 5, is rotatably connected with a fixed rod 8, the top and the bottom of the surface of the fixed rod 8 are both fixedly connected with a hairbrush 9, the hairbrush 9 can clean blades of an exhaust fan 13 by using the rotation of the exhaust fan 13, thereby avoiding the problem of performance reduction caused by dust accumulation of the exhaust fan 13, improving the cleaning force of the blades of the exhaust fan 13, the top and the bottom of the inner wall of the fixed frame 6 are both fixedly connected with sliding plates 10, the opposite sides of the two sliding plates 10 are both slidably connected with sliding blocks 11, the opposite sides of the two sliding blocks 11 are both fixedly connected with the connecting plate 12, the exhaust fan 13, the equal fixedly connected with lug 15 in both sides of pivot 14 inner wall to the front and the back on dead lever 8 surface all offer with the spout 16 of lug 15 looks adaptation, the fixed surface of pivot 14 is connected with flabellum 17.
When the dust cleaning device is used, internal air is exchanged through the exhaust fan 13, the air inside a factory building is introduced into the box body 1 through the air inlet pipe 4, when dust on the fan blades 17 needs to be cleaned, the hydraulic telescopic rod 19 is started through the external switch, the hydraulic telescopic rod 19 can push the connecting plate 12 to drive the exhaust fan to slide on the sliding plate 10, the convex block 15 on the rotating shaft 14 can be clamped into the sliding groove 16, the rotating of the exhaust fan 13 drives the fixing rod 8 to rotate, the brush 9 can clean the dust on the fan blades 17, when the air inside the factory building enters the box body 1, the first motor 28 is started through the external switch, the first motor 28 drives the second sleeve 22 to rotate through the transmission of the first belt pulley 27 and the second belt pulley 29, the suction nozzle 25 introduces the air into the filter barrel 2 through the bent pipe 24, the air is filtered through the rotation of the filter barrel 2, then start second motor 33 through external switch, second motor 33 drives second bevel gear 34 and rotates, second bevel gear 34 drives first bevel gear 32 and rotates, first bevel gear 32 will drive standpipe 31 and rotate, through the purification of purification board 49, exhaust fan 35 extracts the air that purifies through exhaust pipe 37, then discharges through exhaust pipe 38, start water pump 41, water pump 41 extracts the water in water tank 40, then carries out the water spray through second shower nozzle 45, discharge the inside of factory building through pipe 46 at last.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (2)

1. The utility model provides a building factory building ventilation unit, includes box (1) and filter vat (2) etc. its characterized in that: the air-conditioning cabinet is characterized in that a wall body (3) is fixedly connected to the left side of the cabinet body (1), an air inlet pipe (4) is fixedly connected to the bottom of the left side of the wall body (3), one end of the air inlet pipe (4) penetrates through the cabinet body (1) and extends into the cabinet body (1), the other end of the air inlet pipe (4) is communicated with an air collecting hopper (5), a fixing frame (6) is fixedly connected to one side, away from the air inlet pipe (4), of the air collecting hopper (5), a fixing plate (7) is fixedly connected between the top and the bottom of one side, away from the air collecting hopper (5), of the fixing plate (7) is rotatably connected with a fixing rod (8), brushes (9) are fixedly connected to the top and the bottom of the surface of the fixing rod (8), sliding plates (10) are fixedly connected to the top and the bottom of the inner wall of the fixing frame (6), connecting plates (12) are fixedly connected to the opposite sides of the two sliding blocks (11), an exhaust fan (13) is fixedly connected between the opposite sides of the two connecting plates (12), the back surface of the inner wall of the exhaust fan (13) is rotatably connected with a rotating shaft (14) through a motor, bumps (15) are fixedly connected to the two sides of the inner wall of the rotating shaft (14), sliding grooves (16) matched with the bumps (15) are formed in the front surface and the back surface of the fixing rod (8), and fan blades (17) are fixedly connected to the surface of the rotating shaft (14);
a partition plate (30) is fixedly connected between two sides of the inner wall of the box body (1) and right above the filter barrel (2), a vertical pipe (31) is rotatably connected in the middle of the partition plate (30), a first bevel gear (32) is fixedly connected to the top of the surface of the vertical pipe (31), a second motor (33) is fixedly connected to one side of the top of the partition plate (30), a second bevel gear (34) meshed with the first bevel gear (32) is fixedly connected to one end of an output shaft of the second motor (33), an exhaust fan (35) is fixedly connected to the other side of the top of the partition plate (30), a top plate (36) is fixedly connected between two sides of the inner wall of the box body (1) and right above the partition plate (30), and a purification plate (49) is fixedly connected to the bottom end of;
the one end intercommunication of air exhauster (35) air intake has exhaust column (37) to exhaust column (37) are kept away from the one end of air exhauster (35) and are linked together with the top of standpipe (31), the one end intercommunication of air exhauster (35) air outlet has exhaust pipe (38), the one end of exhaust pipe (38) runs through roof (36) and extends to the top of roof (36), exhaust pipe (38) extend to the first shower nozzle of one end fixedly connected with (39) at roof (36) top, the bottom fixedly connected with base (47) of box (1) to one side of base (47) and one side fixed connection of wall body (3), box (1) surperficial both sides all articulate through the hinge has chamber door (48).
2. The building plant ventilation device of claim 1, wherein: the utility model discloses a water supply device, including box (1), the top fixedly connected with water tank (40) of box (1) one side to the bottom fixedly connected with water pump (41) of water tank (40) inner wall, the one side intercommunication at water tank (40) top has inlet tube (42), and the delivery port intercommunication of water pump (41) has outlet pipe (43), the one end of outlet pipe (43) runs through box (1) and extends to the inside of box (1), outlet pipe (43) extend to the inside one end intercommunication of box (1) have violently pipe (44), and violently manage the bottom fixedly connected with second shower nozzle (45) on (44) surface, the top intercommunication of box (1) has pipe (46), the one end of pipe (46) runs through wall body (3) and extends to the inside of wall body (3).
CN202010381684.XA 2018-11-16 2018-11-16 Ventilation device for building factory building Withdrawn CN111457534A (en)

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CN202010381684.XA CN111457534A (en) 2018-11-16 2018-11-16 Ventilation device for building factory building
CN201811365931.6A CN109442661B (en) 2018-11-16 2018-11-16 Ventilation device for building factory building

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