Air curtain-based method for blocking biological factors in air pollutants in subway stations

Abstract

This invention discloses a method for blocking biological agents in the air of subway stations based on an air curtain, comprising the following steps: When a biological agent leak occurs in the public area of ​​the subway station concourse or platform, a sensor in a certain zone first detects the presence of biological agents and generates a sensing signal, which is then transmitted to the air curtain system. The air curtain at the staircase connecting the concourse and platform in that zone is activated, using air supply and exhaust vents to block and eliminate the biological agents within that zone. When the sensor detects that the biological agents have spread to a non-source level, the exhaust system of the source level and the air supply system of the non-source level are activated. The first objective of this invention is to effectively control the biological agents in the source level, facilitating subsequent centralized treatment and containment. The second objective is to promptly replenish fresh air to dilute and reduce the concentration of biological agents when they spread over a large area, thus aiding in personnel escape.

Description

Technical Field

[0001] This invention belongs to the field of rail transit pollutant blocking technology, and particularly relates to a method for blocking biological factors in air pollutants in subway stations based on an air curtain. Background Technology

[0002] As a crucial public transportation facility, the subway is characterized by high population density, large passenger flow, and enclosed spaces. If biological agents in the air pollutants appear in the public areas of subway stations, the health of passengers and staff will be severely threatened. Under certain circumstances, if biological agents enter the subway's air conditioning system, the ventilation ducts may even facilitate their large-scale diffusion. Biological agents are diverse and encompass a wide range of types. Existing blocking measures in subway stations, such as smoke extraction systems and smoke curtains, cannot effectively block and control all biological agents. For some biological agents with densities greater than air, smoke curtains are almost ineffective. Furthermore, the vents of smoke extraction systems are generally located at the top of public areas, causing biological agents to diffuse vertically upwards during ventilation, bringing them to breathing height and posing a greater threat. In addition, the leakage of biological agents from air pollutants is more complex and uncertain than fire, presenting challenges to existing equipment and systems in dealing with such situations. Therefore, there is an urgent need to propose a method for blocking biological agents in subway station air pollutants based on air curtains. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention proposes a method for blocking biological factors in air pollutants in subway stations based on an air curtain. When biological factors appear in the air pollutants in the public areas of subway stations, the method effectively controls the diffusion of biological factors and protects the health of people indoors.

[0004] To achieve the above objectives, the present invention provides a method for blocking biological agents in air pollutants in subway stations based on an air curtain, comprising the following steps:

[0005] The subway station is divided into left and right sections according to the platform level and the concourse level, and each section of the platform level and the concourse level is equipped with a ventilation and air conditioning system, sensors and an air curtain system.

[0006] When a biological agent leaks into the public area of ​​the subway station concourse or platform, the sensor in a certain zone will first detect the presence of the biological agent and generate a sensing signal. The sensing signal will be transmitted to the air curtain system, and the air curtain system of that zone will be activated. The ventilation and air conditioning system will then be used to block and eliminate the biological agent in that zone.

[0007] When the sensor detects that the biological factor has spread to a non-source layer, the ventilation and air conditioning system of the source layer is activated to exhaust air and the ventilation and air conditioning system of the non-source layer is activated to supply air, thereby controlling the biological factor from contaminating other areas.

[0008] After all personnel in the station were evacuated to a safe area, the biological agents that were blocked near the source area were eliminated in a concentrated manner.

[0009] Optionally, the subway station is an underground station, which includes an island platform level on the second underground floor and an integrated concourse level on the first underground floor.

[0010] Optionally, each zone has at least one staircase and sensor connecting the concourse level and the platform level.

[0011] Optionally, the ventilation and air conditioning system includes a supply air subsystem and an exhaust air subsystem. When the sensors in the public area of ​​the station detect the presence of the biological factor, the supply air subsystem and the exhaust air subsystem are shut down. When the biological factor breaks through the obstruction of the air curtain system, the corresponding supply air subsystem and the exhaust air subsystem need to be turned on. At this time, the ventilation and air conditioning system is in 100% fresh air mode, and the supply air duct delivers unpolluted fresh air into the room.

[0012] Optionally, the air curtain system is installed at the staircase connecting the concourse level and the platform level.

[0013] Optionally, the air curtain system includes an air supply outlet and an air exhaust outlet. The air supply outlet is located at the top of the platform level and is connected to the ventilation duct of the public area within the station or is provided with a separate air duct for air supply. The air exhaust outlet is located on the ground of the platform level and is connected to the rail bottom heat exhaust system or is provided with a separate air duct for air exhaust.

[0014] Optionally, the method for blocking leakage of the biological agent includes:

[0015] When the biological agent leaks, the air curtain system is activated in the area where the biological agent is first detected to prevent the biological agent from spreading to another floor. If the biological agent is detected in another zone, the source of the leakage is in the middle of the public area. The air curtain systems in both zones are activated to prevent the agent from spreading to other floors from the other side. If the biological agent is not detected in another zone, it means that the source of the leakage is at the end of the public area. In this case, the air supply system of the other zone needs to be activated to provide supplemental air and prevent the agent from spreading to the other zone.

[0016] Optionally, the preventive blocking method when the biological agent has not leaked includes:

[0017] When the biological agent is not leaking, the air curtain system is in the closed state. When the biological agent is detected in the public area of ​​the station, the air curtain system is opened to supply and exhaust air, forming an air curtain to block the biological agent from spreading to other areas. As a flexible barrier, it is more conducive to the escape of personnel.

[0018] Technical advantages of this invention: This invention discloses a method for blocking biological factors in air pollutants in subway stations based on an air curtain, which effectively controls biological factors in the source layer, facilitating subsequent centralized treatment and placement; when biological factors spread over a large area, timely replenishment of fresh air dilutes and reduces the concentration of biological factors, which is conducive to the timely evacuation of personnel from high-concentration areas. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0020] Figure 1 This is a schematic flowchart of a method for blocking biological factors in air pollutants in subway stations based on an air curtain, according to an embodiment of the present invention.

[0021] Figure 2 This is a schematic diagram of the installation position of the air curtain of the present invention;

[0022] Figure 3 This is a flowchart illustrating the combined operation strategy of the ventilation and air conditioning system and the air curtain system in an embodiment of the present invention. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases the steps shown or described may be executed in a different order than that shown here.

[0025] like Figure 1 As shown, this embodiment provides a method for blocking biological factors in air pollutants in subway stations based on air curtains, including: dividing the subway station into left and right zones according to the platform level and the concourse level, and each zone of the platform level and the concourse level is equipped with a ventilation and air conditioning system, sensors and an air curtain system;

[0026] When a biological agent leak occurs in the public area of ​​the subway station concourse or platform, the sensor in a certain zone will be the first to detect the presence of biological agents and generate a sensing signal. The sensing signal will be transmitted to the air curtain system, and the air curtain system of the zone will be activated. The ventilation and air conditioning system will be used to block and eliminate the biological agents in the zone.

[0027] When the sensor detects that biological agents have spread to a non-source layer, the ventilation and air conditioning system of the source layer is activated to exhaust air, and the ventilation and air conditioning system of the non-source layer is activated to supply air, in order to control the contamination of other areas by biological agents.

[0028] After all personnel in the station were evacuated to a safe area, the biological agents that were blocked near the source area were eliminated in a concentrated manner.

[0029] The specific steps of the biological factor blocking method at the platform level are as follows:

[0030] When a biological agent leak occurs in the public area of ​​the platform level, the sensor in a certain section of the platform level will be the first to detect the presence of the biological agent and transmit the signal to the air curtain system. The air curtain system of the section will be activated to block and eliminate the biological agent in the section, while the ventilation and air conditioning system of the public area will be shut down.

[0031] If biological agents are also detected in another section of the platform level, the air curtain system in that section will be activated to prevent biological agents from entering the concourse level from the other side of the staircase.

[0032] If no biological agent is detected in another zone of the platform level, the ventilation and air conditioning system of that zone will be turned on to supply air, preventing the biological agent from spreading to this zone and controlling the biological agent at its source.

[0033] When the sensors in the concourse detect biological agents, the biological agents have already broken through the barrier of the air curtain system and diffused upwards. At this time, the ventilation and air conditioning system in the concourse is turned on to supply air and the ventilation and air conditioning system in the platform is turned on to exhaust air, in order to control the biological agents from polluting other areas.

[0034] After all personnel in the station were evacuated to a safe area, the biological agents that were blocked near the source area were eliminated in a concentrated manner.

[0035] The specific steps of the biological factor blocking method in the station hall are as follows:

[0036] When a biological agent leaks into the public area of ​​the station hall, the sensor in a certain zone of the station hall will be the first to detect the presence of the biological agent and transmit the signal to the air curtain system. The air curtain system of the zone will be activated to block and eliminate the biological agent in the zone, while the ventilation and air conditioning system of the public area will be shut down.

[0037] If biological agents are also detected in another zone of the concourse, the air curtain system in that zone will be activated to prevent biological agents from entering the platform level from the other side of the staircase.

[0038] If no biological agents are detected in another zone of the station hall, the ventilation and air conditioning system of that zone will be turned on to supply air, preventing the biological agents from spreading to this zone and keeping the biological agents at their source.

[0039] When the sensors on the platform level detect biological agents, the biological agents have already broken through the barrier of the air curtain system and diffused downwards. At this time, the ventilation and air conditioning system on the platform level is turned on to supply air and the ventilation and air conditioning system on the concourse level is turned on to exhaust air, in order to control the biological agents from polluting other areas.

[0040] After all personnel in the station were evacuated to a safe area, the biological agents that were blocked near the source area were eliminated in a concentrated manner.

[0041] like Figure 2 As shown, the subway station is an underground station, comprising an island platform level on the second basement level and an integrated concourse level on the first basement level. The platform and concourse levels are divided into left and right zones, each with its own independent supply and exhaust ventilation subsystem. Each zone has at least one staircase connecting the concourse and platform levels, along with a bio-factor sensor. A blow-suction air curtain is installed at the staircase entrance. Specifically, the blow-suction air curtain includes supply and exhaust vents. The supply vents are located at the top of the platform level and can be connected to the ventilation ducts in the station's public areas or have a separate duct for supplying air. The exhaust vents are located on the ground level of the platform level and can be connected to the rail-mounted heat dissipation system or have a separate duct for exhausting air. When the sensor in the station's public areas detects the presence of bio-factors, the corresponding air curtain activates its supply and exhaust functions. Fresh outdoor air is introduced through the supply vents to dilute the bio-factors within the station, while the bio-factors are discharged through the exhaust vents at the ground level. The combined action of the air supply and exhaust vents of the air curtain forms an air curtain wall, serving as a flexible barrier to control the concentration and spread of biological agents without obstructing escape routes. This air curtain can replace traditional fire protection facilities such as smoke curtains, and in the event of a fire, it can also act as a flexible barrier to prevent the spread of smoke. Under normal subway station operation, the air curtain is in the closed state.

[0042] For subway station air conditioning systems, including air supply and exhaust systems, when the sensors in the public areas of the station detect the presence of biological agents, the air supply and exhaust systems should be shut down; when the biological agents break through the air curtain, the corresponding air supply and exhaust systems should be turned on. At this time, the air conditioning system should be in 100% fresh air mode, and the air supply duct should deliver unpolluted fresh air into the room.

[0043] like Figure 3As shown, taking the diffusion of biological factors at the end of the left side of the platform level as an example, the specific steps include: 1) The sensor in the left side of the platform level senses the biological factors and transmits the signal to the air curtain at the stairwell in the left side of the platform level. The air curtain supply and exhaust vents are opened to supply and exhaust air, forming an air curtain wall to block the biological factors from spreading upward to the concourse level.

[0044] 2) Since the source of the biological agent is located at the end of the left-side section of the platform level, the sensors on the right side of the platform level will not detect the biological agent for a short period. Furthermore, due to the obstruction of the air curtain, the concourse level will also not detect the biological agent for a certain time. At this point, except for the sensor at the source, the other sensors will transmit signals to the air conditioning supply and exhaust systems, activating the air supply system in the right-side section of the platform level to protect this section from the biological agent. Simultaneously, the air supply system provides uncontaminated fresh air to the interior, preventing the biological agent from spreading to the right and diluting its concentration.

[0045] 3) After a period of time, if the biological factor breaks through the air curtain, the concentration of biological factor on the left side of the platform level will be higher. People in this area should leave this zone as soon as possible. The left side of the concourse level will be the first to sense the presence of biological factor. At this time, the sensor will transmit the signal to the air conditioning supply and exhaust system, start the air supply system on the left side of the concourse level and the exhaust system on the left side of the platform level to prevent the biological factor from spreading further in the concourse level, and exhaust the left side of the platform level with higher concentration of biological factor to discharge the biological factor to the outside or collect it for subsequent centralized treatment.

[0046] 4) After all personnel in the station have been evacuated to a safe location, professional personnel should then enter the station to collect or centrally process the biological agents to prevent them from spreading into the outdoor atmosphere and affecting the external environment.

[0047] The above are merely preferred embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for blocking biological agents in air pollutants at a subway station based on an air curtain, characterized by, include: The subway station is divided into left and right sections according to the platform level and the concourse level, and each section of the platform level and the concourse level is equipped with a ventilation and air conditioning system, sensors and an air curtain system. When a biological agent leaks into the public area of ​​the subway station concourse or platform, a sensor in a specific zone will first detect the presence of the biological agent and generate a sensing signal. This signal will be transmitted to the air curtain system, activating the air curtain system for that zone. The ventilation and air conditioning system will then block and eliminate the biological agent in that zone. The ventilation and air conditioning system includes a supply air subsystem and an exhaust air subsystem. When the sensor in the public area of ​​the station detects the presence of the biological agent, both the supply air subsystem and the exhaust air subsystem will be shut down. When the biological agent overcomes the obstruction of the air curtain system, the corresponding supply air subsystem and exhaust air subsystem will be activated. At this time, the ventilation and air conditioning system will operate in 100% fresh air mode, with uncontaminated fresh air being delivered into the room through the supply air ducts. When the sensor detects that the biological factor has spread to a non-source layer, the ventilation and air conditioning system of the source layer is activated to exhaust air and the ventilation and air conditioning system of the non-source layer is activated to supply air, thereby controlling the biological factor from contaminating other areas. After all personnel at the station were evacuated to a safe area, the biological agents that were blocked near the source area were eliminated in a concentrated manner.

2. The method for blocking biological agents in air pollutants in subway stations based on an air curtain as described in claim 1, characterized in that, The subway station is an underground station, the platform level is an island platform on the second underground level, and the concourse level is an integrated concourse on the first underground level.

3. The method for blocking biological agents in air pollutants in subway stations based on an air curtain as described in claim 1, characterized in that, Each zone has at least one staircase and sensor connecting the concourse level and the platform level.

4. The method for blocking biological agents in air pollutants in subway stations based on an air curtain as described in claim 1, characterized in that, The air curtain system is installed at the staircase connecting the concourse level and the platform level.

5. The method for blocking biological agents in air pollutants in subway stations based on an air curtain as described in claim 1, characterized in that, The air curtain system includes air supply outlets and air exhaust outlets. The air supply outlets are located at the top of the platform level and are connected to the ventilation ducts of the public area within the station or are provided with separate air ducts for air supply. The air exhaust outlets are located on the ground of the platform level and are connected to the rail bottom heat exhaust system or are provided with separate air ducts for air exhaust.

6. The method for blocking biological agents in air pollutants in subway stations based on an air curtain as described in claim 1, characterized in that, Methods for preventing leakage of the biological agent include: When the biological agent leaks, the air curtain system is activated in the area where the biological agent is first detected to prevent the biological agent from spreading to another floor. If the biological agent is detected in another zone, the source of the leakage is in the middle of the public area. The air curtain systems in both zones are activated to prevent the agent from spreading to other floors from the other side. If the biological agent is not detected in another zone, it means that the source of the leakage is at the end of the public area. In this case, the air supply system of the other zone needs to be activated to provide supplemental air and prevent the agent from spreading to the other zone.

7. The method for blocking biological agents in air pollutants in subway stations based on an air curtain as described in claim 6, characterized in that, Preventive blocking methods when the biological agent has not leaked include: When the biological agent is not leaking, the air curtain system is in the closed state. When the biological agent is detected in the public area of ​​the station, the air curtain system is opened to supply and exhaust air, forming an air curtain to block the biological agent from spreading to other areas. As a flexible barrier, it is more conducive to the escape of personnel.

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