CN109186033A - A kind of emergency ventilation of Underground Garage room and mean time ventilation common system - Google Patents
A kind of emergency ventilation of Underground Garage room and mean time ventilation common system Download PDFInfo
- Publication number
- CN109186033A CN109186033A CN201811031252.5A CN201811031252A CN109186033A CN 109186033 A CN109186033 A CN 109186033A CN 201811031252 A CN201811031252 A CN 201811031252A CN 109186033 A CN109186033 A CN 109186033A
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- Prior art keywords
- air
- room
- exhaust
- ventilation
- mean time
- 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.)
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Links
- 238000009423 ventilation Methods 0.000 title claims abstract description 71
- 239000002356 single layer Substances 0.000 claims abstract description 24
- 238000007664 blowing Methods 0.000 claims abstract 3
- 230000003584 silencer Effects 0.000 claims description 5
- 239000000779 smoke Substances 0.000 claims description 5
- 230000008033 biological extinction Effects 0.000 abstract description 7
- 238000010276 construction Methods 0.000 abstract description 7
- 238000009434 installation Methods 0.000 abstract description 6
- 235000019504 cigarettes Nutrition 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010792 warming Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- UKACHOXRXFQJFN-UHFFFAOYSA-N heptafluoropropane Chemical compound FC(F)C(F)(F)C(F)(F)F UKACHOXRXFQJFN-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
- F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
- F24F7/08—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit with separate ducts for supplied and exhausted air with provisions for reversal of the input and output systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
- F24F2003/144—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification by dehumidification only
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
- F24F2013/247—Active noise-suppression
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ventilation (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
Abstract
The invention discloses a kind of emergency ventilations of Underground Garage room and mean time ventilation common system, underground storehouse is that several preferably use the room of extinction using gas, breeze fan and exhaust fan are lifted in storehouse, breeze fan one end passes through air-supply air hose connection air-supply vertical shaft, the other end of breeze fan is connect by air hose of blowing with the single layer blinds air outlet being arranged in each room, and the junction of air-supply air hose and the air shaft is equipped with fire resisting damper one；Exhaust fan one end connects exhaust air shaft by air draft air hose, the other end of exhaust fan is connect by air draft air hose with the single layer blinds exhaust outlet being arranged in each room, air draft air hose and exhaust air shaft junction are equipped with fire resisting damper two, are respectively provided with electronic split multi-clack control valve before the single layer blinds air outlet and single layer blinds exhaust outlet in each room.The present invention shares room emergency ventilation and mean time ventilation system, can save installation space, reduce cost, shorten the construction period.
Description
Technical field
The present invention relates to ventilating system technical field, it particularly relates to a kind of emergency ventilation of Underground Garage room with usually lead to
Wind common system.
Background technique
For the storehouse (room that such as file store preferably uses gas extinguishing system) being built up in the underground space, according to rule
Model requirement, should not use automatic sprinkler system, and gas extinguishing system should be arranged to cope with fire incident, but be used for gas
The gas (such as heptafluoro-propane) of fire extinguishing has certain toxicity, this just needs the emergency ventilation system after fire extinguishing is arranged in the storehouse
System, emergency ventilation amount are 12 times/hour.At the same time, underground storehouse be also required to setting mean time ventilation system changed to meet ventilation
Gas requirement, mean time ventilation amount are 4 times/hour.In the prior art, two sets of ventages can be generally set in such Underground Garage room
System, a set of is emergency ventilation system, and another set of is mean time ventilation system.
Two sets of ventilating systems of setting need to will affect interior architecture layer in this way using two Fans and two sets of ventilation shafts
Height increases blower and air hose cost.So as can by emergency ventilation system and usually ventilating system shares, when mean time ventilation, is every
A storehouse can be run simultaneously, occurred to carry out emergency ventilation to accident room one by one when accident, on the one hand can be saved peace in this way
Space is filled, increases indoor opposite layer height, on the other hand can reduce the quantity of air hose, air port and blower, civil construction is effectively reduced
Cost and air hose production, installation cost and blower cost of investment, shorten the construction period.
It when mean time ventilation and emergency ventilation, need to guarantee the rate of ventilation of mean time ventilation and emergency ventilation simultaneously, but usually lead to
Wind rate of ventilation is 3 times of the rate of ventilation of emergency ventilation, and Control System Design is complicated when sharing.The application is used by locellus
Electric air valve and warming and cigarette sense, which combine, rationally controls exhaust outlet, it can be ensured that the high ventilation of emergency ventilation after extinction using gas
Suitable rate of ventilation when number and mean time ventilation.
Summary of the invention
For above-mentioned technical problem in the related technology, the present invention proposes a kind of emergency ventilation of Underground Garage room and mean time ventilation
Common system can overcome the above-mentioned deficiency of the prior art.
To realize the above-mentioned technical purpose, the technical scheme of the present invention is realized as follows:
A kind of emergency ventilation of Underground Garage room and mean time ventilation common system, underground storehouse includes several rooms, and each room is equal
The room being advisable using extinction using gas, such as archive office etc. are lifted with breeze fan and exhaust fan in the underground storehouse,
Described breeze fan one end is passed through air-supply air hose and is set by air-supply air hose connection air-supply vertical shaft, the other end of the breeze fan
The single layer blinds air outlet connection in each room is set, the junction of the air-supply air hose and the air shaft is equipped with fire prevention
Valve one；Described exhaust fan one end connects exhaust air shaft by air draft air hose, and the other end of the exhaust fan passes through air draft wind
The single layer blinds exhaust outlet managed and be arranged in each room connects, and the air draft air hose and exhaust air shaft junction are equipped with fire prevention
Valve two is respectively provided with electronic split multi-clack control valve before the single layer blinds air outlet and single layer blinds exhaust outlet in each room,
The electronic split multi-clack control valve is chain with breeze fan and exhaust fan and is connected with control button.
Further, the fire resisting damper one is 70 DEG C of normally opened fire resisting dampers.
Further, the fire resisting damper two is 280 DEG C of normally opened fire resisting dampers.
Further, the outlet air end of the breeze fan and the exhaust fan air intake are respectively provided with silencer.
Further, moving dehumidifier, smoke detector and heat detector are equipped in each described room.
Compared with prior art, the present invention having the advantage that
1, room emergency ventilation and mean time ventilation system are shared, installation space can be saved；
2, room emergency ventilation and mean time ventilation system are shared, the quantity of air hose, air port and blower can be reduced, be effectively reduced ground
The production of civil construction cost and air hose, installation cost and the blower cost of investment of down space, shorten the construction period；
3, locellus is combined using Electric air valve and warming and cigarette sense and is rationally controlled exhaust outlet, it is ensured that accident after extinction using gas
Suitable rate of ventilation when the high rate of ventilation and mean time ventilation of ventilation.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of described according to embodiments of the present invention Underground Garage room emergency ventilation and mean time ventilation common system shows
It is intended to；
In figure: 1, room；2, air-supply vertical shaft；3,70 DEG C of normally opened fire resisting dampers；4, breeze fan；5, silencer；6, single layer blinds is sent
Air port；7, electronic split multi-clack control valve；8, air-supply air hose；9, exhaust air shaft；10,280 DEG C of normally opened fire resisting dampers；11, air draft wind
Machine；12, air draft air hose；13, single layer blinds exhaust outlet；14, moving dehumidifier；15, smoke detector；16, heat detector；
17, control button.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art's every other embodiment obtained belong to what the present invention protected
Range.
As shown in Figure 1, a kind of Underground Garage room emergency ventilation described according to embodiments of the present invention shares with mean time ventilation and is
System, underground storehouse include several rooms 1, and each room is advisable the room using extinction using gas, such as archive office etc. is described
Underground storehouse in be lifted with breeze fan 4 and exhaust fan 11, described 4 one end of breeze fan is sent by the air-supply connection of air hose 8
The other end of wind vertical shaft 2, the breeze fan 4 passes through air-supply air hose 8 and the single layer blinds air outlet 6 being arranged in each room
The junction of connection, the air-supply air hose 8 and the air shaft 2 is equipped with fire resisting damper one；Described 11 one end of exhaust fan passes through
Air draft air hose 12 connects exhaust air shaft 9, and the other end of the exhaust fan 11 by air draft air hose 12 and is arranged in each room
In single layer blinds exhaust outlet 6 connect, the air draft air hose 12 is equipped with fire resisting damper two with 9 junction of exhaust air shaft, described each
It is respectively provided with electronic split multi-clack control valve 7 before the single layer blinds air outlet 6 and single layer blinds exhaust outlet 13 in room, it is described electronic right
It opens multi-clack control valve 7 and breeze fan 4 and exhaust fan 11 is chain and be connected with control button 17.
In one embodiment, the fire resisting damper one is 70 DEG C of normally opened fire resisting dampers 3.
In one embodiment, the fire resisting damper two is 280 DEG C of normally opened fire resisting dampers 10.
In one embodiment, the outlet air end of the breeze fan 4 and 11 air intake of the exhaust fan are respectively provided with and disappear
Sound device 5.
In one embodiment, moving dehumidifier 14, smoke detector 15 and sense are equipped in each described room 1
Warm detector 16.
In order to facilitate understanding above-mentioned technical proposal of the invention, below by way of in specifically used mode to of the invention above-mentioned
Technical solution is described in detail.
A kind of Underground Garage room emergency ventilation according to the present invention and mean time ventilation common system, including breeze fan 4,
The breeze fan 4 is lifted in room 1, and by air-supply 8 one end of air hose connection air-supply vertical shaft 2, the other end passes through air-supply air hose 8
It is connect with the single layer blinds air outlet 6 being arranged in each room, air-supply air hose 8 and 2 junction of air shaft are arranged 70 DEG C often
Fire resisting damper 3 is opened, silencer 5 is set in 4 outlet air end of breeze fan, is arranged before each single layer blinds air outlet 6 electronic split leafy
Regulating valve 7；Exhaust fan 11 is also lifted in room 1, connects exhaust air shaft 9 by 12 one end of air draft air hose, the other end passes through
Air draft air hose 12 is connect with the single layer blinds exhaust outlet 13 being arranged in each room, and air draft air hose 12 is connect with exhaust air shaft 9
280 DEG C of normally opened fire resisting dampers 10 of place's setting, before 11 air intake of exhaust fan setting silencer 5, each single layer blinds exhaust outlet 13
Electronic split multi-clack control valve 7 is set.It opens when moving dehumidifier 14 is flat and dehumidifies to room.
The course of work of the invention is as follows: when 1 mean time ventilation of room, breeze fan 4 and exhaust fan 11 are run simultaneously, are sent
Electronic split multi-clack control valve 7 in wind system and exhaust system is switched on, and breeze fan 4 sends fresh air in room, is met
The requirement of indoor occupant fresh air volume, return air are discharged in exhaust air shaft 9 by exhaust fan 11.
When fire occurs in a certain room 1, smoke detector 15 or heat detector 16 issue alarm signal, air-supply
Blower 4 and exhaust fan 11 are out of service, and the electronic split multi-clack control valve 7 and blower in supply air system and exhaust system are chain
It all closes, gas extinguishing system is actuated for putting out a fire.After the completion of fire extinguishing, it is manually pressed by the control button 17 in accident room, it should
Electronic split multi-clack control valve 7 in room 1 before single layer blinds air outlet 6 and single layer blinds exhaust outlet 13 is opened, other rooms
The corresponding electronic split multi-clack control valve 7 in air port is still in off state, and breeze fan 4 and the starting operation of exhaust fan 11 carry out thing
Therefore it divulges information.If fire occurs simultaneously for multiple rooms, after the completion of extinction using gas, it is first manually pressed by the control button in a room, to
To the control button for pressing another room after the room emergency ventilation again, accident successively is carried out to accident room one by one
Ventilation.
In conclusion the present invention shares room emergency ventilation and mean time ventilation system, installation space can be saved；By room
Emergency ventilation is shared with mean time ventilation system, can reduce the quantity of air hose, air port and blower, and the civil engineering of the underground space is effectively reduced
Construction cost and air hose production, installation cost and blower cost of investment, shorten the construction period；Locellus using Electric air valve and warming and
Cigarette sense is combined and is rationally controlled exhaust outlet, it is ensured that after extinction using gas when the high rate of ventilation and mean time ventilation of emergency ventilation
It is suitable for rate of ventilation.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (5)
1. a kind of emergency ventilation of Underground Garage room and mean time ventilation common system, which is characterized in that underground storehouse includes several rooms
Between (1), be lifted with breeze fan (4) and exhaust fan (11) in the underground storehouse, described breeze fan (4) one end passes through
Air hose (8) connection of blowing is blown vertical shaft (2), and the other end of the breeze fan (4) by air-supply air hose (8) and is arranged each
Single layer blinds air outlet (6) connection in room, the junction for blowing air hose (8) and the air shaft (2) are equipped with anti-
Fiery valve one；Described exhaust fan (11) one end connects exhaust air shaft (9) by air draft air hose (12), the exhaust fan (11)
The other end is connect by air draft air hose (12) with the single layer blinds exhaust outlet (6) being arranged in each room, the air draft air hose
(12) fire resisting damper two, the single layer blinds air outlet (6) and single layer blinds in each room are equipped with exhaust air shaft (9) junction
Electronic split multi-clack control valve (7), the electronic split multi-clack control valve (7) and breeze fan are respectively provided with before exhaust outlet (13)
(4) and exhaust fan (11) is chain and be connected with control button (17).
2. a kind of Underground Garage room emergency ventilation according to claim 1 and mean time ventilation common system, which is characterized in that institute
The fire resisting damper one stated is 70 DEG C of normally opened fire resisting dampers (3).
3. a kind of Underground Garage room emergency ventilation according to claim 1 and mean time ventilation common system, which is characterized in that institute
The fire resisting damper two stated is 280 DEG C of normally opened fire resisting dampers (10).
4. a kind of Underground Garage room emergency ventilation according to claim 1 and mean time ventilation common system, which is characterized in that institute
The outlet air end and the exhaust fan (11) air intake for stating breeze fan (4) are respectively provided with silencer (5).
5. a kind of Underground Garage room emergency ventilation according to claim 1 and mean time ventilation common system, which is characterized in that institute
It states in each room (1) and is equipped with moving dehumidifier (14), smoke detector (15) and heat detector (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811031252.5A CN109186033A (en) | 2018-09-05 | 2018-09-05 | A kind of emergency ventilation of Underground Garage room and mean time ventilation common system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811031252.5A CN109186033A (en) | 2018-09-05 | 2018-09-05 | A kind of emergency ventilation of Underground Garage room and mean time ventilation common system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109186033A true CN109186033A (en) | 2019-01-11 |
Family
ID=64914731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811031252.5A Pending CN109186033A (en) | 2018-09-05 | 2018-09-05 | A kind of emergency ventilation of Underground Garage room and mean time ventilation common system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109186033A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110354420A (en) * | 2019-07-15 | 2019-10-22 | 国网湖南省电力有限公司 | A kind of city cable tunnel fire hazard fire extinguishing system and application method |
| CN111720945A (en) * | 2020-07-21 | 2020-09-29 | 中铁（天津）隧道工程勘察设计有限公司 | Ventilation system and method for subway equipment room |
| CN114001423A (en) * | 2021-11-03 | 2022-02-01 | 北京市设备安装工程集团有限公司 | Sealed non-return exhaust system |
| CN115013913A (en) * | 2022-05-31 | 2022-09-06 | 贵州腾翔通风设备安装有限公司 | Ventilating duct structure |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4417740A1 (en) * | 1994-05-20 | 1995-11-23 | Ebh Elektro Gmbh | Ventilation of multistorey building |
| CN105546709A (en) * | 2016-02-04 | 2016-05-04 | 山东格瑞德集团有限公司 | Pore plate air supply and distribution system |
| CN206131309U (en) * | 2016-09-21 | 2017-04-26 | 沈阳市华域建筑设计有限公司 | Gas is put out a fire and available secret for equipment room ventilation system that airs exhaust that discharges fume |
| CN107725090A (en) * | 2017-10-10 | 2018-02-23 | 上海市政工程设计研究总院（集团）有限公司 | A kind of subterranean tunnel ventilating system and its implementation |
| CN209197077U (en) * | 2018-09-05 | 2019-08-02 | 中铁建设集团有限公司 | A kind of emergency ventilation of Underground Garage room and mean time ventilation common system |
-
2018
- 2018-09-05 CN CN201811031252.5A patent/CN109186033A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4417740A1 (en) * | 1994-05-20 | 1995-11-23 | Ebh Elektro Gmbh | Ventilation of multistorey building |
| CN105546709A (en) * | 2016-02-04 | 2016-05-04 | 山东格瑞德集团有限公司 | Pore plate air supply and distribution system |
| CN206131309U (en) * | 2016-09-21 | 2017-04-26 | 沈阳市华域建筑设计有限公司 | Gas is put out a fire and available secret for equipment room ventilation system that airs exhaust that discharges fume |
| CN107725090A (en) * | 2017-10-10 | 2018-02-23 | 上海市政工程设计研究总院（集团）有限公司 | A kind of subterranean tunnel ventilating system and its implementation |
| CN209197077U (en) * | 2018-09-05 | 2019-08-02 | 中铁建设集团有限公司 | A kind of emergency ventilation of Underground Garage room and mean time ventilation common system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110354420A (en) * | 2019-07-15 | 2019-10-22 | 国网湖南省电力有限公司 | A kind of city cable tunnel fire hazard fire extinguishing system and application method |
| CN111720945A (en) * | 2020-07-21 | 2020-09-29 | 中铁（天津）隧道工程勘察设计有限公司 | Ventilation system and method for subway equipment room |
| CN114001423A (en) * | 2021-11-03 | 2022-02-01 | 北京市设备安装工程集团有限公司 | Sealed non-return exhaust system |
| CN115013913A (en) * | 2022-05-31 | 2022-09-06 | 贵州腾翔通风设备安装有限公司 | Ventilating duct structure |
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