CN114353232A - Pressurized air supply system and pressure relief method for staircase - Google Patents
Pressurized air supply system and pressure relief method for staircase Download PDFInfo
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- CN114353232A CN114353232A CN202111674178.0A CN202111674178A CN114353232A CN 114353232 A CN114353232 A CN 114353232A CN 202111674178 A CN202111674178 A CN 202111674178A CN 114353232 A CN114353232 A CN 114353232A
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Abstract
The invention discloses a pressurized air supply system for a staircase, which comprises a controller, a plurality of pressurized air supply mechanisms and air outlets in one-to-one correspondence with the pressurized air supply mechanisms, wherein each pressurized air supply mechanism comprises an air outlet channel, a backflow channel, a pressure difference sensor, a pressurized air supply device and a first control valve, the pressurized air supply device is electrically connected with the controller, one end of each pressurized air supply device is communicated with the outside atmosphere, the other end of each pressurized air supply device is communicated with the air outlet through the air outlet channel, the pressurized air supply devices are used for conveying air to the air outlets positioned in a pressurized air supply area, and the pressure difference sensor is used for collecting the pressure difference between the pressurized air supply area such as a front room, a closed refuge room, the staircase and a walkway; the two ends of the backflow channel are respectively communicated with the first inlet and the air outlet channel, and the first control valve controls airflow from the second inlet to the second outlet. A pressure relief method comprises the staircase pressurization air supply system, achieves the pressure relief effect and can avoid adverse effects caused by air flow exhausted to the external environment.
Description
Technical Field
The invention belongs to the field of fire safety, and particularly relates to a pressurized air supply system and a pressure relief method for a staircase.
Background
At present, according to technical standard of building smoke prevention and exhaust system (GB 51251 and 2017), 3.4.4 items: the mechanical pressurizing air supply quantity is required to meet the condition that the pressure from the corridor to the front room is distributed in an increasing mode, and in order to prevent smoke from entering the staircase, the air pressure of the smoke-proof staircase is required to be larger than that of the front room, and the air pressure of the front room is larger than that of the walkway. Meanwhile, in order to prevent the situation that the fire door cannot be normally opened due to overlarge pressure difference between the staircase and the front chamber and between the front chamber and the indoor walkway, evacuation of people and rescue of fire fighters are affected, and pressure relief measures are taken when the residual pressure value of the system exceeds the maximum allowable pressure difference. When the stairway and the front room of the subway station directly face the rail running area, the pressure relief valve can directly relieve pressure to the rail running area. With the rapid development of urban rail transit, the speed per hour of a high-speed line and a city area fast line which are built or planned is as high as 120km/h or even 160km/h, the pressure relief of the high-speed line and the city area fast line can affect the driving safety, even if a pressure relief valve is arranged on a train running at a current low speed, if the pressure relief valve is arranged facing the rail running area, when the train passes through, the pressure of the rail running area is changed rapidly under the action of piston wind, the high-frequency opening and closing of the pressure relief valve can be caused, metal impact sound can be generated, and the work of subway operators can be affected.
Therefore, a new technology is needed to solve the problem of adverse effect on the surrounding environment when the pressurization air supply system is depressurized in the prior art.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a pressurized air supply system and a pressure relief method for a staircase, wherein the pressure relief process has little influence on the surrounding environment.
The invention adopts the following technical scheme:
a pressurized air supply system for a staircase comprises a controller, a plurality of pressurized air supply mechanisms and air outlets which are in one-to-one correspondence with the pressurized air supply mechanisms, wherein one end of each pressurized air supply mechanism is communicated with the outside atmosphere, the other end of each pressurized air supply mechanism is communicated with each air outlet, each air outlet is positioned in each pressurized air supply area, and each pressurized air supply mechanism is used for pressurized air supply to each pressurized air supply area;
the pressurized air supply mechanism comprises a pressurized air supply device, an air outlet channel, a first control valve and a pressure difference sensor, the pressurized air supply device is provided with a first inlet and a first outlet, the first inlet is communicated with the outside atmosphere, one end of the air outlet channel is communicated with one air outlet, the other end of the air outlet channel is communicated with the first outlet, the pressurized air supply device conveys air to the air outlet, the pressurized air supply device, the pressure difference sensor and the first control valve are all electrically connected with the controller, and the pressure difference sensor is used for collecting pressure difference between each pressurized air supply area and the walkway;
the pressurizing air supply mechanism further comprises a return channel, a second inlet and a second outlet are respectively arranged at two ends of the return channel, the second inlet is communicated with the air outlet channel, the second outlet is communicated with the first inlet, and the first control valve is connected with the return channel and used for controlling the air volume from the second inlet to the second outlet.
As a further improvement of the technical scheme of the invention, the air conditioner further comprises an air inlet channel, one end of the air inlet channel is provided with an air inlet, the other end of the air inlet channel is communicated with the first inlet, the air inlet is communicated with the outside atmosphere, and one end of the backflow channel is communicated with the first inlet through the air inlet channel.
As a further improvement of the technical scheme of the invention, fire-proof valves are arranged at the connecting nodes of the air inlet channel, the air outlet channel and each wall.
As a further improvement of the technical scheme of the invention, an air shaft is arranged at the air inlet.
As a further improvement of the technical solution of the present invention, the pressurized air supply mechanism further includes a second control valve, and the second control valve is connected to the first outlet and is used for adjusting the flow rate of the air flow in the air outlet channel.
As a further improvement of the technical solution of the present invention, the controller is provided with an input end and an output end, each of the differential pressure sensors is electrically connected to the input end, and the pressurized air supply device, each of the first control valves, and each of the second control valves are electrically connected to the output end.
As a further improvement of the technical scheme of the invention, the pressurized air supply device is a pressurized fan.
As a further improvement of the technical solution of the present invention, each of the first control valves is a continuously adjustable electric air valve, and each of the second control valves is an on-off electric air valve.
In a further improvement of the present invention, the pressurized air supply area is an antechamber, a closed refuge room, and a stairway, a pressure difference between the antechamber, the closed refuge room, and the walkway is 25Pa to 30Pa, and a pressure difference between the stairway and the walkway is 40Pa to 50 Pa.
A pressure relief method comprising the pressurized staircase air supply system as described above, comprising the steps of:
when the differential pressure measured by the differential pressure sensor exceeds the maximum allowable differential pressure, the controller controls the first control valve to be opened, and the first control valve controls the air flow to flow from the second inlet to the second outlet.
Compared with the prior art, the invention has the beneficial effects that:
the pressurization air supply device conveys air to the air outlet, and the air pressure of the adjacent area of the pressurization air supply area is constantly changed, so that the pressure difference between the adjacent areas can be changed at any time, the pressure difference sensor can monitor the pressure difference in real time, when the pressure difference measured by the pressure difference sensor exceeds the maximum allowable pressure difference, the controller controls the first control valve to start, the first control valve controls part of air flow in the air outlet channel to be conveyed to the first inlet through the backflow channel to form a part of air inlet flow, the air flow conveyed to the air outlet in the air outlet channel is reduced, the air pressure of the position where the air outlet is located is reduced, the pressure relief effect is realized, meanwhile, the air inlet flow is formed again by the shunted part of air flow and does not enter an external space, and the possible adverse effect of the shunted air flow on the surrounding environment when the pressurization air supply system relieves the pressure is avoided.
Drawings
The technology of the present invention will be described in further detail with reference to the accompanying drawings and detailed description below:
FIG. 1 is a schematic view of an embodiment of a pressurized air supply system for a stairwell according to the present invention;
FIG. 2 is a schematic view of an overall structure of a pressurized air supply system for a staircase according to an embodiment of the present invention;
fig. 3 is a schematic diagram of the three-dimensional structure of the pressurized air supply system for stairwells according to the embodiment of the present invention.
Reference numerals:
1-a pressurized air supply mechanism; 11-a pressurized air supply device; 111-a first inlet; 112-a first outlet; 12-an air outlet channel; 13-a second control valve; 14-a first control valve; 15-differential pressure sensor; 16-a return channel; 161-a second inlet; 162-a second outlet; 17-air inlet channel;
2-air outlet;
3-a staircase;
4-antechamber;
5-a walkway;
6-a fire damper;
7-air shaft.
Detailed Description
The conception, the specific structure and the technical effects of the present invention will be clearly and completely described in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the schemes and the effects of the present invention. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The same reference numbers will be used throughout the drawings to refer to the same or like parts.
It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature or indirectly fixed or connected to the other feature. Further, the description of the upper, lower, left, right, etc. used in the present invention is only with respect to the positional relationship of the respective components of the present invention with respect to each other in the drawings.
Referring to fig. 1 to 3, a pressurized air supply system for a staircase includes a controller, a plurality of pressurized air supply mechanisms 1 and an air outlet 2 corresponding to one of the pressurized air supply mechanisms 1, wherein one end of each pressurized air supply mechanism 1 is communicated with the outside atmosphere, the other end of each pressurized air supply mechanism 1 is communicated with each air outlet 2, each air outlet 2 is located in each pressurized air supply area, each pressurized air supply mechanism 1 is used for supplying air to each pressurized air supply area, the pressurized air supply areas can be a front room 4, a closed refuge room and a staircase 3, when a plurality of areas in a building need pressurized air supply, a plurality of air outlets 2 need to be arranged to supply air to each area under pressure, and at this time, a plurality of pressurized air supply mechanisms 1 can be arranged to supply air to a plurality of air outlets 2 under pressure.
The pressurized air supply mechanism 1 includes a pressurized air supply device 11, an air outlet channel 12, a first control valve 14 and a differential pressure sensor 15, the pressurized air supply device 11 is a pressurized fan, the pressurized air supply device 11 is provided with a first inlet 111 and a first outlet 112, the first inlet 111 is communicated with the outside atmosphere, one end of the air outlet channel 12 is communicated with one of the air outlets 2, the other end is communicated with the first outlet 112, the pressurized air supply device 11 supplies air to the air outlet 2, the pressurized air supply device 11 supplies air in the outside atmosphere to the air outlet channel 12 along the first inlet 111 and the first outlet 112 in sequence to form an air flow, and finally the air flow enters the area needing pressurized air supply through the air outlet 2, the pressurized air supply device 11, the differential pressure sensor 15 and the first control valve 14 are all electrically connected to the controller, and the air outlet 2 can be located in the front collecting chamber 4, the front collecting chamber 4 front, the second control valve 14 front and the controller front end, The pressure difference sensor 15 is arranged on the wall bodies of the stairwell 3, the antechamber 4, the closed refuge room and the walkway 5, and the pressure difference sensor 15 is used for collecting the pressure difference between the areas needing pressurized air supply, such as the antechamber 4, the closed refuge room, the stairwell 3 and the walkway 5.
The pressurization air supply mechanism 1 further includes a backflow channel 16, two ends of the backflow channel 16 are respectively a second inlet 161 and a second outlet 162, the second inlet 161 is communicated with the air outlet channel 12, a connection node of the second inlet 161 and the air outlet channel 12 is located between the first outlet 112 and the air outlet 2 and is arranged close to the first outlet 112, that is, is arranged away from the air outlet 2, so that a part of air entering the air outlet channel 12 from the second inlet 161 is rapidly divided and enters the backflow channel 16, and most structures in the pressurization air supply mechanism 1 are intensively arranged in the same space, thereby facilitating installation and circuit design, the second outlet 162 is communicated with the first inlet 111, the first control valve 14 is connected with the backflow channel 16 and is used for controlling the air flow from the second inlet 161 to the second outlet 162, and the pressure relief channel is formed by the backflow channel 16, simple structure, practicality height and commonality are strong. The first control valve 14 controls a part of air in the air outlet channel 12 to be conveyed to the first inlet 111 by the backflow channel 16 to form a part of the inlet air flow, so that the air flow conveyed to the air outlet 2 in the air outlet channel 12 is reduced, the air pressure at the position of the air outlet 2 is reduced, the realized pressure relief effect is achieved, and meanwhile, as the part of the diverted air forms the inlet air flow again and does not enter the external space, the adverse effect of the diverted air on the surrounding environment when the pressurized air supply system relieves the pressure is avoided.
Specifically, the pressurization air supply system of this scheme still includes inlet air channel 17, inlet air channel 17 one end is equipped with the air intake, air intake department is equipped with air shaft 7, the other end with first import 111 intercommunication, the air intake with external atmosphere intercommunication, 16 one end of backward flow passageway is passed through inlet air channel 17 with first import 111 intercommunication. And fire valves 6 are arranged at the joints of the air inlet channel 17, the air outlet channel 12 and each wall.
Specifically, the pressurized air supply mechanism 1 further includes a second control valve 13, the second control valve 13 is connected to the first outlet 112 and is used for adjusting the airflow rate in the air outlet channel 12, wherein the second control valve 13 is located at the first outlet 112 and connected to the air outlet channel 12, the second control valve 13 can control the opening degree of the first outlet 112 to adjust the airflow rate in the air outlet channel 12, so that the output air pressure of the pressurized air supply mechanism 1 is kept stable during the non-pressure-releasing process, and the pressurized air supply pressure to the area where the air outlet 2 is located is kept stable, and the air pressure of the adjacent area where the air outlet 2 is located is constantly changed, so that the pressure difference between the adjacent area can be changed at any time, and the pressure difference sensor 15 can monitor the pressure difference in real time.
Specifically, the controller is provided with an input end and an output end, each of the differential pressure sensors 15 is electrically connected to the input end, and the pressurized air supply device 11, each of the first control valves 14, and each of the second control valves 13 are electrically connected to the output end. Each of the first control valves 14 is a continuously adjustable electric air valve, each of the second control valves 13 is an on-off electric air valve, the second control valves 13 can be opened synchronously with the pressurized air supply device 11, the second control valves 13 can be opened by adjusting the opening degree of the first outlet 112, thereby regulating the air volume in the air outlet channel 12, the controller controls the first control valve 14 to open and then regulate the air flow in the backflow channel 16 to flow from the second inlet 161 to the second outlet 162, meanwhile, the first control valve 14 can continuously adjust the airflow flow in the backflow channel 16 according to the real-time pressure difference monitored by the pressure difference sensor 15, a connection node between the first control valve 14 and the backflow channel is set as a first connection node, the backflow channel at the first connection node has a first cross section through which the airflow can pass, and the first control valve 14 can adjust and control the airflow flow in the backflow channel 16 by controlling the size of the first cross section.
Specifically, in order to prevent smoke from entering the staircase 3, the air pressure of the smoke-proof staircase 3 is required to be greater than the air pressure of the front chamber 4, the air pressure of the front chamber 4 is greater than the air pressure of the walkway 5, and the mechanical pressurization air supply quantity is required to meet the requirement that the pressure between the walkway 5 and the front chamber 4 is distributed in an increasing mode, so that the pressure difference between the front chamber 4, the closed refuge room and the walkway 5 is 25-30 Pa, the pressure difference between the staircase 3 and the walkway 5 is 40-50 Pa, the situation that the fire door cannot be normally opened due to the fact that the pressure difference between the staircase 3 and the front chamber 4 and between the front chamber 4 and the fire door 4 and between the indoor walkway 5 is too large can be better prevented in the pressure difference range, and people can be evacuated and rescued by fire fighters conveniently.
A method of pressure relief, comprising a pressurized air supply system for a staircase 3 as described above, comprising the steps of:
when the differential pressure measured by the differential pressure sensor 15 exceeds the maximum allowable differential pressure, the controller controls the first control valve 14 to open, and the first control valve 14 controls the air flow to flow from the second inlet 161 to the second outlet 162.
A pressurizing fan is adopted to pressurize and blow air to areas such as a staircase 3, a front chamber 4 or a closed refuge room and the like through an air outlet 2, a differential pressure sensor 15 is used for detecting the differential pressure change among the areas and transmitting the signal to a controller, the controller receives a real-time differential pressure signal, the maximum allowable pressure difference is arranged in a control system of the controller, when the differential pressure between the front chamber 4, the closed refuge room, the staircase 3 and the like and a walkway 5 exceeds the maximum allowable pressure difference, the controller controls a first control valve 14 electrically connected with the controller to start, the first control valve 14 is a continuously adjustable electric air valve, the first control valve 14 controls a part of air flow in an air outlet channel 12 at a first outlet 112 to be shunted into a return channel 16, so that the air flow conveyed to the air outlet 2 in the air outlet channel 12 is reduced, the air pressure at the position of the air outlet 2 is reduced, and the differential pressure between the area of the air outlet 2 and adjacent areas such as the walkway 5 is reduced to be within a set range, therefore, the controllable pressure relief effect is realized, and meanwhile, in the pressure relief process, the air flow entering the backflow channel 16 enters the air inlet channel 17 to form the air inlet flow again, so that the possible adverse effect on the surrounding environment caused by the part of the shunted air flow entering the outside air is avoided. If the pressure release valve is arranged in the subway engineering structure and faces the rail running area, when a train passes through, the air pressure of the rail running area is changed rapidly due to the action of piston wind, so that the high-frequency opening and closing of the pressure release valve are caused, metal impact sound is generated, the working environment of subway operators is seriously influenced, the use of the pressure release valve of the staircase 3 or the front chamber 4 which is directly communicated with the walkway 5 is cancelled in the scheme, when the pressurizing and air supplying system of the scheme is applied to the subway engineering structure, the staircase 3 and the front chamber 4 of the subway station directly face the rail running area, the pressure release of the staircase 3 or the front chamber 4 which directly faces the rail running area can be avoided, the driving safety of the rail running area is ensured, the safety of the pressure release is improved, the metal impact sound caused by the high-frequency opening and closing of the pressure release valve caused by the piston wind when the train passes through can be avoided, and the working environment of the subway operators is effectively improved.
In one embodiment, when the pressure difference between the front room 4 and the walkway 5 is greater than 30Pa and the pressure difference between the stairwell 3 and the walkway 5 is greater than 50Pa, the controller controls the first control valve 14 on the air duct parallel to the pressurizing fan to open for pressure relief, wherein the controller can control the opening and closing degree and the opening and closing time of the first control valve 14 on the air duct parallel to the pressurizing fan, and the pressure relief is effectively performed.
In the first embodiment, referring to fig. 1, the pressurized air supply system of the present embodiment supplies air to the smoke-proof stairwell 3 and the front room 4, when the front room 4 has a plurality of doors connected to the walkway 5, the smoke-proof stairwell 3, the front room 4, and the walkway 5 are sequentially and adjacently disposed, the smoke-proof stairwell 3 and the front room 4 are both provided with the air outlets 2, at this time, two or more pressurized air supply systems can be used to control the pressurized air supply to different air outlet 2 positions, the smoke-proof stairwell 3 and the front room 4 are both provided with the pressure difference sensor 15, the pressure difference between the smoke-proof stairwell 3, the front room 4, and the walkway 5 can be more accurately monitored and the electrical signals are transmitted to the controller, when the controller receives the pressure difference between the front room 4 and the walkway 5 and the pressure difference between the stairwell 3 and the walkway 5 exceeds the preset maximum allowable pressure difference, the controller controls the first control valve 14 to open for pressure release, when the controller receives the pressure difference and reduces to the set range, and controlling the first control valve 14 to close, namely completing the pressure relief process.
In the second embodiment, referring to fig. 2, the pressurized air supply system according to this embodiment supplies air to the smoke-proof stairwell 3 and the front room 4 in a pressurized manner, when only one door of the front room 4 is connected to the walkway 5, the smoke-proof stairwell 3, the front room 4, and the walkway 5 are sequentially arranged adjacent to each other, the air outlet 2 is located in the smoke-proof stairwell 3, the differential pressure sensor 15 is located in the front room 4 and is used for monitoring the differential pressure between the smoke-proof stairwell 3, the front room 4, and the walkway 5 and transmitting an electric signal to the controller, when the controller receives the differential pressure between the front room 4 and the walkway 5 and the differential pressure between the stairwell 3 and the walkway 5 exceeds a preset maximum allowable differential pressure, the controller controls the first control valve 14 to open for pressure relief, and when the controller receives that the differential pressure is reduced to a set range, the first control valve 14 is controlled to close, so that the pressure relief process is completed.
In the third embodiment, referring to fig. 3, the pressurized air supply system according to the present disclosure supplies air to the closed stairwell 3 in a pressurized manner, at this time, the closed stairwell 3 is adjacent to the walkway 5, the air outlet 2 is located in the closed stairwell 3, the pressure difference sensor 15 is located in the closed stairwell 3 and is configured to monitor a pressure difference between the closed stairwell 3 and the walkway 5 and transmit an electrical signal to the controller, when the controller receives that the pressure difference between the closed stairwell 3 and the walkway 5 exceeds a preset maximum allowable pressure difference, the controller controls the first control valve 14 to open for pressure relief, and when the controller receives that the pressure difference is reduced to a set range, the first control valve 14 is controlled to close, so that a pressure relief process is completed.
Other contents of the pressurized air supply system and the pressure relief method for the staircase according to the present invention refer to the prior art, and are not described herein again.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, so that any modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (10)
1. A pressurized air supply system for a staircase is characterized in that: the air conditioner comprises a controller, a plurality of pressurized air supply mechanisms and air outlets which correspond to the pressurized air supply mechanisms one by one, wherein one end of each pressurized air supply mechanism is communicated with the outside atmosphere, the other end of each pressurized air supply mechanism is communicated with each air outlet, each air outlet is positioned in each pressurized air supply area, and each pressurized air supply mechanism is used for pressurized air supply to each pressurized air supply area;
the pressurized air supply mechanism comprises a pressurized air supply device, an air outlet channel, a first control valve and a pressure difference sensor, the pressurized air supply device is provided with a first inlet and a first outlet, the first inlet is communicated with the outside atmosphere, one end of the air outlet channel is communicated with one air outlet, the other end of the air outlet channel is communicated with the first outlet, the pressurized air supply device conveys air to the air outlet, the pressurized air supply device, the pressure difference sensor and the first control valve are all electrically connected with the controller, and the pressure difference sensor is used for collecting pressure difference between each pressurized air supply area and the walkway;
the pressurizing air supply mechanism further comprises a return channel, a second inlet and a second outlet are respectively arranged at two ends of the return channel, the second inlet is communicated with the air outlet channel, the second outlet is communicated with the first inlet, and the first control valve is connected with the return channel and used for controlling the air volume from the second inlet to the second outlet.
2. The staircase pressurized air supply system of claim 1, wherein: still include inlet air channel, inlet air channel one end is equipped with the air intake, the other end with first import intercommunication, air intake and external atmosphere intercommunication, return flow channel one end is passed through inlet air channel with first import intercommunication.
3. The staircase pressurized air supply system of claim 2, wherein: the air inlet channel, the air outlet channel all are equipped with the fire prevention valve with the connected node department of each wall.
4. The staircase pressurized air supply system of claim 2, wherein: and an air shaft is arranged at the air inlet.
5. The staircase pressurized air supply system of claim 1, wherein: the pressurizing air supply mechanism further comprises a second control valve, and the second control valve is connected with the first outlet and used for adjusting the air flow in the air outlet channel.
6. The staircase pressurized air supply system of claim 5, wherein: the controller is provided with an input end and an output end, each pressure difference sensor is electrically connected with the input end, and the pressurizing and air-supplying device, each first control valve and each second control valve are electrically connected with the output end respectively.
7. The staircase pressurized air supply system of claim 6, wherein: the pressurizing air supply device is a pressurizing fan.
8. The staircase pressurized air supply system of claim 6, wherein: each first control valve is a continuously adjustable electric air valve, and each second control valve is an on-off electric air valve.
9. The staircase pressurized air supply system of claim 1, wherein: the pressurized air supply area is an antechamber, a closed refuge room and a stairway, the pressure difference among the antechamber, the closed refuge room and the walkway is 25 Pa-30 Pa, and the pressure difference between the stairway and the walkway is 40 Pa-50 Pa.
10. A method of pressure relief comprising the staircase pressurized air supply system of any of claims 1-9, wherein: the method comprises the following steps:
when the differential pressure measured by the differential pressure sensor exceeds the maximum allowable differential pressure, the controller controls the first control valve to be opened, and the first control valve controls the air flow to flow from the second inlet to the second outlet.
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| CN202111674178.0A CN114353232A (en) | 2021-12-31 | 2021-12-31 | Pressurized air supply system and pressure relief method for staircase |
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| CN202111674178.0A CN114353232A (en) | 2021-12-31 | 2021-12-31 | Pressurized air supply system and pressure relief method for staircase |
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| CN113063210A (en) * | 2020-01-02 | 2021-07-02 | 湖南集森节能环保科技有限公司 | Linkage smoke-proof intelligent control system for air port fan |
| CN113251534A (en) * | 2021-05-21 | 2021-08-13 | 中铁第六勘察设计院集团有限公司 | Scissor stair pressurization air supply system for fire evacuation of subway station |
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2021
- 2021-12-31 CN CN202111674178.0A patent/CN114353232A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017041467A1 (en) * | 2015-09-10 | 2017-03-16 | 江苏永昇空调有限公司 | Anti-explosion positive pressure air supply air conditioning device for driller room |
| CN206710843U (en) * | 2017-04-28 | 2017-12-05 | 佛山一众传感仪器有限公司 | The pressure difference control system of belt switch amount output |
| CN207990874U (en) * | 2018-01-12 | 2018-10-19 | 上海三益建筑设计有限公司 | Pressure difference control device for building smoke control system |
| CN110440389A (en) * | 2019-08-15 | 2019-11-12 | 重庆众夏科技有限公司 | A kind of fire-fighting emergent evacuation overbottom pressure monitoring method and system |
| CN113063210A (en) * | 2020-01-02 | 2021-07-02 | 湖南集森节能环保科技有限公司 | Linkage smoke-proof intelligent control system for air port fan |
| CN113251534A (en) * | 2021-05-21 | 2021-08-13 | 中铁第六勘察设计院集团有限公司 | Scissor stair pressurization air supply system for fire evacuation of subway station |
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