CN114291269A - Negative pressure isolation system for vehicle cabin - Google Patents
Negative pressure isolation system for vehicle cabin Download PDFInfo
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- CN114291269A CN114291269A CN202210087382.0A CN202210087382A CN114291269A CN 114291269 A CN114291269 A CN 114291269A CN 202210087382 A CN202210087382 A CN 202210087382A CN 114291269 A CN114291269 A CN 114291269A
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- 238000002955 isolation Methods 0.000 title claims abstract description 83
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- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
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Abstract
A negative pressure isolation system for a vehicle cabin comprises a high-pressure air curtain air supply subsystem and a negative pressure air collection and exhaust subsystem; the high-pressure air curtain air supply subsystem can be arranged in a ceiling of the cabin and comprises a high-pressure air curtain air supply pipeline, a high-pressure air curtain air supply port and a booster fan; one side of the high-pressure air curtain air supply pipeline is connected with a main air supply pipeline of the air distribution system of the vehicle, an air supply port of the high-pressure air curtain is arranged at the other side of the high-pressure air curtain air supply pipeline, and the delivered air flow forms an air curtain from top to bottom to form an isolation area; the negative pressure gas collection and air exhaust subsystem can be arranged below the floor of the cabin and comprises a negative pressure gas collection tank, an air exhaust pipeline, an air outlet and an air exhaust valve, wherein one side of the air exhaust pipeline is connected with the negative pressure gas collection tank, and the other side of the air exhaust pipeline is connected with the air exhaust valve; the air outlet is arranged at the top of the negative pressure air collecting box; the negative pressure gas collection box is arranged on the corresponding area of the gas curtain isolation area. By means of the system, an air curtain isolation area can be formed to reduce the infection risk, and the system can be connected with the original ventilation system to realize conversion under different epidemic prevention conditions.
Description
Technical Field
The present invention relates to air conditioning systems for vehicles, and more particularly to air conditioning systems that provide a contamination-protected insulated space within the cabin of a vehicle, such as an aircraft, train, or the like.
Background
In the existing vehicles, such as civil aircraft, the air distribution system usually adopts ventilation mode of top air supply and bottom air exhaust of the passenger cabin. To reduce the engine air supply, aircraft are often equipped with a recirculation system, i.e. part of the cabin exhaust air is filtered by the recirculation system and returned to the cabin for air circulation. Meanwhile, although the existing aircraft cabin is divided into first class cabin, business class cabin, economic class cabin and other different classes, and independent air supply and exhaust are adopted among the different classes of cabins, in the whole aircraft cabin, the different classes of cabins are only shielded by cloth curtains, so that the mutual flow of air among the cabins cannot be prevented, and the mutual independence of air supply/exhaust systems among the cabins cannot be realized. The air flow between different seats of the same cabin is inevitable.
Aircraft is one of the most important vehicles, and its recirculation system is widely subject to the grief of passengers, especially to the uneasiness of passengers during the outbreak of respiratory infectious diseases. Although the recirculation filter is arranged in the recirculation system, bacteria, viruses and the like in the air can be filtered, but the worry of uncertain filtering effect limits the selection of passengers to take the airplane for going out during the epidemic situation. In addition, because the cabin has small space between different seats, the health condition of passengers to other passengers around the seats is unknown, and the air flow among the seats is severe, which are factors causing potential threats to the health of the passengers during an epidemic situation.
For example, trains, buses and the like are transportation means frequently selected by people during traveling, but the problems that the air conditioning system cannot meet the requirements of hygiene and epidemic prevention often exist due to the fact that the cabin space is narrow and the like, so that a measure capable of utilizing the existing air conditioning system to meet the requirements of emergency hygiene and epidemic prevention is also needed.
As is known, the prior art has proposed solutions and devices in order to provide a contamination-proof environment in a local space, or to prevent the escape of contaminated air. For example, the prior art CN112407291A relates to an intelligent travel protection method based on a flying vehicle and a system thereof, which includes a safety device, a zone protection device and a controller module. The method and system of the prior art detect the body temperature of the person above the seat through the controller module; through identification, whether a human body and a seat below the airbag group cage are popped up or not is determined; once the air bag is popped up, the controller module performs negative pressure control, so that an isolation space is formed in the air bag cover and ventilation and air exchange are performed; the prior art method and system therefore requires a physical insulation space to be formed by the bladder, requires additional installation space and requires reliable bladder ejection and the inability to remove contaminants from the insulation space.
In addition, prior art CN202010445822.6 relates to an indoor negative pressure control method, terminal, negative pressure isolation consulting room, wherein the method includes 1. a pressure sensor identifies indoor air pressure; 2. comparing the identified air pressure value with a preset air pressure value; 3. and adjusting the air intake and the air discharge according to the comparison result to maintain the negative pressure of the target area, wherein the negative pressure control method mainly comprises the steps of acquiring the indoor air pressure value of the indoor area through a pressure sensor system, identifying the difference between the indoor pressure and a preset value, and further controlling the air discharge. The prior art is applied to the indoor isolation place of a closed building to realize negative pressure control, and does not relate to how to use the negative pressure control in linkage with the existing ventilation system of the building.
Furthermore, prior art JP 1996-337295 relates to a negative pressure type indoor smoke separating mechanism and a smoking room in an aircraft. The smoking chamber consists of three side air curtains and an inner wall, and three side air outlets are downward to form the air curtains to isolate the smoking chamber from the passenger cabin; the exhaust port is arranged above the ceiling, and forms a negative pressure environment in the smoking room by forcibly exhausting air. According to the prior art, a negative pressure smoking chamber is formed in a part of an airplane by utilizing an onboard space and an air curtain, a vortex is formed inside the smoking chamber, air flow organization is formed by air inflow at two sides, and air is upwards exhausted in the middle. However, in this prior art, the pipeline is arranged only in a partial area, instead of providing an on-board integrated air supply and exhaust isolation system, and air in areas on both sides of the smoking room needs to be sucked, and air supply and exhaust isolation between areas cannot be realized.
Therefore, a vehicle cabin ventilation system capable of meeting requirements of epidemic situations and normal operation needs at the same time needs to be developed, particularly, air-conditioning ventilation systems of existing airplanes, trains, buses and the like need to be optimized, and epidemic prevention combination of cabin ventilation systems is realized through minimum design change, namely, partial passengers are isolated, pathogen leakage is prevented, and isolation requirements of cabins are met; during normal operation, the ventilation mode is switched to meet the normal operation requirement of the cabin.
Disclosure of Invention
In view of the problems in the prior art, the invention aims to provide a negative pressure isolation system for a vehicle cabin, which can be arranged in a specific area to reduce the risk of infecting others when a boarding passenger is found to have respiratory infectious diseases; and the system can be connected with the original ventilation system of the airplane, and can realize the conversion under two different conditions of epidemic prevention.
In order to achieve the aim, the invention provides a negative pressure isolation system of a vehicle cabin, which comprises a high-pressure air curtain air supply subsystem and a negative pressure air collection and exhaust subsystem; wherein:
the high-pressure air curtain air supply subsystem can be arranged in a ceiling of a cabin of a vehicle and comprises a high-pressure air curtain air supply pipeline, a high-pressure air curtain air supply port and a booster fan, wherein the booster fan is arranged on the high-pressure air curtain air supply pipeline to increase the pressure head of airflow; one side of the high-pressure air curtain air supply pipeline is connected with a main air supply pipeline of a vehicle air distribution system, the high-pressure air curtain air supply port is arranged at the other side of the high-pressure air curtain air supply pipeline, and an air curtain from top to bottom is formed by air flow sent out by the high-pressure air curtain air supply port to form an isolation area; the negative pressure gas collection and air exhaust subsystem can be arranged below the floor of a cabin of a vehicle and comprises a negative pressure gas collection tank, an air exhaust pipeline, an air outlet and an air exhaust valve, wherein one side of the air exhaust pipeline is connected with the negative pressure gas collection tank, and the other side of the air exhaust pipeline is connected with the air exhaust valve; the air outlet is arranged at the top of the negative pressure air collection box; the negative pressure gas collection box is arranged on an area corresponding to the gas curtain isolation area formed by the high-pressure gas curtain gas supply port.
By the scheme, the system comprises a high-pressure air curtain air supply subsystem and a negative-pressure air collection and exhaust subsystem which are respectively connected with an air distribution system in an original ventilation system of a vehicle, such as an airplane, and a booster fan is arranged on a high-pressure air curtain air supply pipeline so as to form high-speed air flow at a high-pressure air curtain air supply port. Meanwhile, vehicles such as airplanes and trains, which are generally supplied with air at the top of a cabin, exhaust air downward, such as airplanes, are discharged into an underfloor area through an exhaust port located at the floor. Meanwhile, the aircraft is provided with an exhaust valve at the belly, and the exhaust valve is communicated with the outside atmosphere. When flying, the pressure is the same as the external environment, and the area under the floor of the airplane is a relative negative pressure area compared with the cockpit area; by the same token, a relatively negative pressure zone is also formed in the cabin and underfloor areas when the train or bus is running at high speed. Therefore, the invention is beneficial to be realized on the existing vehicles, such as airplanes, and once the boarding passenger is found to have epidemic respiratory infectious diseases, the boarding passenger can be arranged in a specific area, so that the risk of infecting other people is reduced, and the conversion of epidemic application situations is realized.
According to one aspect of the invention, the high pressure air curtain supply subsystem further includes a dc supply port connectable to a supply leg of a vehicle air distribution system and located above the cabin to supply air directly into the air curtain isolation zone formed by the high pressure air curtain supply port.
The direct current air supply port is connected with the air supply branch pipe of the air distribution system of the vehicle and is positioned above the cabin, so that sufficient air can be provided for personnel in the air curtain isolation area, and a direct current environment from top to bottom can be created due to the fact that the direct current air supply port is positioned at the top of the cabin.
According to one aspect of the invention, the direct current air supply port is a vehicle cabin air supply port.
The direct current air supply port can be used for simplifying the arrangement by utilizing the air supply port of the original vehicle cabin.
According to one aspect of the invention, the dc supply port is in the form of a multi-tuyere array.
By arranging the direct current air supply ports in a multi-port array form, better air supply uniformity can be obtained.
According to one aspect of the invention, the high pressure air curtain supply subsystem further comprises a shutoff valve disposed on the high pressure air curtain supply air duct to control communication with a main supply air duct of the vehicle air distribution system.
The shutoff valve is arranged on the high-pressure air curtain air supply pipeline, when the shutoff valve is opened, the air flow is communicated from the main air supply pipe of the air distribution system of the vehicle, and the air flow is conveyed to the high-pressure air curtain air supply pipeline from the main air supply pipeline, so that the air flow forming the air curtain isolation area can be obtained by directly utilizing the original air distribution system on the air conditioner or the vehicle, no additional air supply equipment is required to be arranged, and the weight of the additional equipment on the air conditioner or the vehicle can not be increased.
By arranging the booster fan on the high-pressure air curtain air supply pipeline, high-speed airflow can be formed at the high-pressure air curtain air supply port.
According to an aspect of the present invention, the booster fan may be provided in linkage with the shut-off shutter, the booster fan being operated when the shut-off shutter is opened, and the booster fan being not activated when the shut-off shutter is closed.
By means of linkage of the booster fan and the shutoff valve, when the cabin does not need to realize an isolation function, the shutoff valve is closed, the booster fan is not started, and airflow in the main air supply pipeline is conveyed to each area of the cabin through each air supply branch pipe. When the cabin needs to realize a local isolation function, the shutoff valve is opened, the booster fan works, the pressure head of the air flow in the high-pressure air curtain air supply pipeline rises under the boosting action of the booster fan, so that the high-pressure air curtain air supply port forms high-speed air flow, and an air curtain isolation region from top to bottom is formed in the isolation region range defined by the air supply port. However, since the air curtain isolation area is in a negative pressure environment and has lower pressure compared with other areas of the cabin, the flow in other air supply branch pipes connected with the main air supply pipe can be automatically reduced, and after the booster fan is started, the flow distribution in the main air supply pipe can reach dynamic balance in the high-pressure air curtain air supply pipeline and each air supply branch pipe so as not to influence the air supply of each air supply branch pipe to a non-isolation area.
According to one aspect of the invention, the high pressure air curtain supply port is provided in a ceiling of a cabin of a vehicle, and is arranged in a slotted or perforated array.
By means of the shape and arrangement of the air supply ports of the high-pressure air curtain, the boundary of the formed air curtain isolation area is a strip-shaped air curtain from top to bottom, and air interaction at the inner side and the outer side of the isolation area is isolated.
According to a further aspect of the invention, the negative pressure plenum is an enclosed space, the top of which is formed by the vehicle cabin floor and the bottom of which is formed by the vehicle floor sandwich panel, and further comprising side baffles arranged vertically with the air curtain isolation zone as a boundary.
By utilizing the vehicle, especially the floor structure of the aircraft cabin to form the negative pressure gas collecting box, the weight and the structural complexity of the aircraft can not be obviously increased, and the effect of preventing the pollution airflow from leaking into the cabin can be obtained without occupying limited space of the aircraft cabin.
According to another aspect of the invention, the air outlet is arranged at the top of the negative pressure air collection box and leads into the negative pressure air collection box, and is arranged opposite to the high pressure air curtain air supply port in the up-down direction.
By means of the vertical arrangement of the air outlet and the high-pressure air curtain air supply port, high-pressure and high-speed airflow can bring polluted airflow in the air curtain isolation region into the negative-pressure air collection box as soon as possible, and the high-pressure airflow is blown downwards from the upper side directly opposite to the air outlet, so that the isolation region with clear boundaries can be formed, and the isolation effect is better.
According to one aspect of the invention, the vehicle is an aircraft, the exhaust duct is arranged in a Y shape, one side of the exhaust duct is connected with the negative pressure gas collecting box, one side of the exhaust duct connected with the exhaust valve is a branch side, and the exhaust duct is respectively communicated with a triangular area of an aircraft exhaust system to convey exhaust from the negative pressure gas collecting box to the triangular area to participate in on-board air circulation and is communicated with the exhaust valve to discharge the exhaust from the negative pressure gas collecting box to the outside of the aircraft.
By means of the Y-shaped exhaust pipeline, exhaust gas in the negative pressure gas collecting box can be conveyed to the triangular area again as required to participate in air recirculation on the air conditioner; or the polluted exhaust gas in the negative pressure gas collecting box is directly conveyed to an exhaust valve, for example, the polluted exhaust gas can be directly exhausted to the outside of the machine.
According to one aspect of the invention, the negative pressure air collecting and exhausting subsystem further comprises a shutoff valve, and the shutoff valves are respectively arranged on the branch sides of the exhaust pipeline.
By means of the shutoff valves arranged on the branched sides, when the cabin does not need to realize an isolation function, the shutoff valves on the fork branches leading to the exhaust valve are closed, the shutoff valves on the fork branches leading to the triangular area are opened, and airflow is conveyed to the triangular area by the negative pressure gas collecting box to participate in recirculation; when the cabin needs to realize the isolation function, the shutoff valves on the fork branches leading to the triangular area are closed, the shutoff valves on the fork branches leading to the exhaust valves are opened, and airflow is conveyed to the exhaust valves by the negative pressure gas collecting box and is directly exhausted out of the cabin.
According to one aspect of the invention, the vehicle further comprises a train, a public bus.
The cabin isolation system of the vehicle can simultaneously realize various functional modes such as isolation, direct current air supply, negative pressure air collection, air exhaust according to requirements and the like, and is connected with an air distribution system and an independent air exhaust system of an original ventilation system of the vehicles such as airplanes, trains, buses and the like, so that the weight of the airplanes or vehicles and the complicated structure program are not obviously increased, and the cabin space is not occupied.
Brief Description of Drawings
FIG. 1 is a schematic view of an embodiment of the vehicle cabin negative pressure isolation system of the present invention;
FIG. 2 is a schematic view of the connection of the high pressure curtain air delivery subsystem of the present invention to the air distribution system of the vehicle ventilation system;
FIG. 3 is a schematic view of a portion of a vehicle cabin to illustrate the corresponding arrangement of the high pressure curtain air supply and exhaust ports of the present invention;
fig. 4 and 5 are schematic operation diagrams of the negative pressure isolation system of the vehicle cabin respectively under two conditions of epidemic prevention.
Detailed Description
FIG. 1 shows a schematic view of an embodiment of a vehicle cabin negative pressure isolation system of the present invention, and FIG. 2 shows a schematic view of a high pressure air curtain supply subsystem coupled to a vehicle air distribution system;
the system comprises a high-pressure air curtain air supply subsystem I and a negative pressure air collection and exhaust subsystem II, wherein the high-pressure air curtain air supply subsystem I is positioned above the negative pressure air collection and exhaust subsystem II, so that the negative pressure isolation system of the cabin of the vehicle can be substantially applied to vehicles with an air distribution system in an upper air exhaust and lower air exhaust mode, such as airplanes, trains, buses and the like. The high-pressure air curtain air supply subsystem I can be arranged in a ceiling of a vehicle, such as an airplane cabin, and comprises a high-pressure air curtain air supply pipeline 10, a high-pressure air curtain air supply port 11 and a booster fan 12, wherein the booster fan 12 is arranged on the high-pressure air curtain air supply pipeline 10 to increase the pressure head of airflow; wherein, one side of the high pressure air curtain air supply pipeline 10 is connected to the main air supply pipeline 20 of the vehicle air distribution system III, the high pressure air curtain air supply port 11 is arranged at the other side of the high pressure air curtain air supply pipeline, the air from the main air supply pipeline 20 of the air distribution system is pressurized by the booster fan 12 and then is sent out by the high pressure air curtain air supply port 11, and the exhausted high pressure air flow forms an air curtain from top to bottom to form an isolation area A so as to isolate the air circulation with the peripheral area.
The negative pressure gas collection and exhaust subsystem II can be arranged below the floor of a cabin of a vehicle and comprises a negative pressure gas collection tank 30, an exhaust pipeline 31, an exhaust port 32 and an exhaust valve 33, wherein one side of the exhaust pipeline 31 is connected with the negative pressure gas collection tank 30, and the other side of the exhaust pipeline is connected with the exhaust valve 33; the air outlet 32 is arranged on the negative pressure air collection box 30; the negative pressure gas collecting box 30 is disposed in a region corresponding to the gas curtain isolation region a formed by the high pressure gas curtain gas supply port 11.
By the above scheme of the present invention, the two subsystems I, II including high-pressure air curtain air supply and negative-pressure air collection and exhaust are respectively connected to the original air distribution system of a vehicle, such as an airplane, and the booster fan 12 is arranged on the high-pressure air curtain air supply pipeline 10 to increase the pressure head of exhaust, so that high-speed air flow is formed at the high-pressure air curtain air supply port 11, and an isolation area can be quickly formed for the vehicle air conditioning system in the form of upper air outlet and lower air exhaust. If the boarding passenger is found to have epidemic respiratory infectious diseases, the boarding passenger can be arranged in the isolation area A, so that the risk of infecting other people is reduced, and the conversion of the application condition of the vehicle air distribution system is realized.
As further shown in fig. 2, the high-pressure air curtain blowing subsystem I further includes a shutoff valve 13, and the shutoff valve 13 is disposed on the high-pressure air curtain blowing pipeline 10 to control the communication with the main blowing pipe 20 of the vehicle air distribution system. As shown in fig. 2, the shutoff shutter 13 may be located on the high-pressure veiled air supply duct 10 at a position between the main air supply duct 20 and the booster fan 12. When the shut-off valve 13 is opened, the air flow is communicated with the main air supply pipe 20 of the vehicle air distribution system, and the air flow is conveyed from the main air supply pipe 20 to the high-pressure air curtain air supply pipe 10, so that the air flow forming the air curtain isolation area can be obtained by directly utilizing the exhaust air in the original air distribution system on the air conditioner or the vehicle, and no additional air supply equipment is required to be arranged, so that the weight of additional equipment on the air conditioner or the vehicle is not increased.
In the present invention, the booster fan 12 may be provided in linkage with the shutoff shutter 13, and when the shutoff shutter 13 is opened, the booster fan 12 operates; conversely, when the shut-off shutter 13 is closed, the booster fan 12 is not started.
By the linkage of the booster fan 12 and the shutoff valve 13, when the cabin does not need to realize the isolation function, the shutoff valve 13 is closed, the booster fan 12 is not started, and the airflow in the main air supply pipeline 20 is conveyed to each area of the cabin through each air supply branch pipe 21 of the vehicle air distribution system. When the cabin needs to realize a local isolation function, the shutoff valve 13 is opened, the booster fan 12 works, the pressure head of the airflow in the high-pressure air curtain air supply pipeline 10 is raised under the boosting action of the booster fan 12, high-speed airflow is formed at the high-pressure air curtain air supply port 11, and an air curtain isolation area A from top to bottom is formed in the area range defined by the air supply port. Furthermore, since the air curtain isolation area a is in a negative pressure environment and has a lower pressure than other areas of the cabin, the flow rate in the other air supply branch pipes 21 connected to the main air supply pipe 20 is automatically reduced, and when the booster fan 12 is started, the flow rate distribution in the main air supply pipe 20 is dynamically balanced between the high pressure air curtain air supply pipeline 10 and each air supply branch pipe 21 so as not to affect the air supply of each air supply branch pipe 21 to the non-isolation area.
As further shown in fig. 1, the high pressure air curtain supply subsystem I of the present invention further includes a dc supply port 14, and the dc supply port 14 is connected to a supply branch duct 21 of the vehicle air distribution system and is located above the cabin to directly supply air into the air curtain isolation area a formed by the high pressure air curtain supply port 11.
By connecting the above dc supply port 14 with the supply branch duct 21 of the vehicle air distribution system and locating above the cabin, it is possible to supply a sufficient amount of air to the persons in the air curtain isolation area a, and since it is located at the top of the cabin, it is possible to create a dc environment from top to bottom.
Preferably, the direct current air supply port 14 may be a vehicle cabin air supply port. The direct current air supply port utilizes the original air supply port of the cabin of the vehicle, so that the arrangement can be simplified.
Preferably, the DC feed port 14 is in the form of a multi-tuyere array. By arranging the dc air supply ports 14 in a multi-port array, better air supply uniformity can be obtained.
Further, as shown in fig. 1 and 3, the high pressure air curtain supply port 11 may be provided in the ceiling of the cabin of the vehicle, having a slit-like or hole-like array arrangement. By the shape and arrangement of the high-pressure air curtain air supply port 11, the boundary of the air curtain isolation area A is a strip-shaped air curtain from top to bottom, and the air interaction between the inner side and the outer side of the isolation area A is isolated.
In addition, the negative pressure air collecting box 30 of the negative pressure air collecting and exhausting subsystem II shown in fig. 1 is a closed space, the top 301 of which is formed by the floor of the cabin of the vehicle, the bottom 302 of which is formed by the interlayer partition board of the floor of the vehicle, and further comprises a side baffle 303, and the side baffle 303 is vertically arranged with the air curtain isolation area a as the boundary.
By forming the negative pressure plenum 30 using a vehicle, such as an aircraft cabin floor structure, the weight and structural complexity of the aircraft is not significantly increased, and the effect of preventing the escape of contaminants into the cabin is achieved without occupying a limited aircraft cabin space.
More specifically, the air outlet 32 of the negative pressure air collecting and exhausting subsystem II is disposed at the top 301 of the negative pressure air collecting box 30 and leads into the negative pressure air collecting box 30, and is opposite to the high pressure air curtain air supply port 11 in the up-down direction, as shown in fig. 3.
By the arrangement of the air outlet 32 and the high-pressure air curtain air supply port 11 facing upward and downward as shown in fig. 3, the high-pressure and high-speed air flow can bring the polluted air flow in the air curtain isolation region into the negative pressure air collection box 30 as soon as possible, and the high-pressure air flow is directly blown downward from above against the air outlet 32, which is beneficial to forming the isolation region a with a definite boundary, and the isolation effect is better.
Preferably, the vehicle is an airplane, and the exhaust duct 31 of the negative pressure air collecting and exhausting subsystem II shown in fig. 1 is arranged in a Y shape, one side of which is connected to the negative pressure air collecting box 30, and one side of which connected to the exhaust valve 33 is a branched side, and respectively leads to a triangular area (not shown) of the airplane exhaust system to convey the exhaust air from the negative pressure air collecting box 30 to the triangular area to participate in the air circulation on the airplane, and leads to the exhaust valve 33 to exhaust the exhaust air from the negative pressure air collecting box 30 to the outside.
The exhaust gas in the negative pressure gas collecting box 30 can be conveyed to the triangular area again as required by the Y-shaped exhaust pipeline 31 to participate in the air recirculation on the air conditioner; or the polluted exhaust gas in the negative pressure gas collecting box 30 is directly conveyed to the exhaust valve 33, for example, the polluted exhaust gas can be directly exhausted to the outside of the machine.
Specifically, the negative pressure air collecting and exhausting subsystem II further includes a shutoff valve 34, and the shutoff valves 34 and 34' are respectively disposed on the branch sides of the exhaust pipeline 31.
By means of the shut-off flaps 34 arranged on the bifurcation sides, when the cabin does not need to realize the isolation function, the shut-off flaps 34 on the prongs leading to the exhaust valves 33 are closed, the shut-off flaps 34' on the prongs leading to the triangular space are opened, and the airflow is conveyed to the triangular space by the negative pressure gas collection box 30 to participate in the recirculation; when the cabin needs to realize the isolation function, the shutoff valve 34' on the branch leading to the triangular area is closed, the shutoff valve on the branch leading to the exhaust valve is opened, and the airflow is conveyed to the exhaust valve 33 by the negative pressure gas collecting box 30 and is directly exhausted out of the machine.
Referring to fig. 4 and 5, schematic views of the operation of an embodiment of the vehicle cabin negative pressure isolation system of the present invention in two cases of epidemic prevention are shown. Specifically, as shown in fig. 4, when the cabin does not need to realize the isolation function under the operation condition of the vehicles such as an airplane, a train, a public bus and the like, the shutoff valve 13 in the high-pressure air curtain air supply subsystem I is closed, the booster fan 12 is not started, no air flows in the high-pressure air curtain air supply pipeline 10, and the air flow in the main air supply pipeline is conveyed to each area of the cabin through each air supply branch pipe. The shutoff valve 34 in the negative pressure gas collection and exhaust subsystem is opened, the shutoff valve 34' is closed, the air in the area corresponding to the isolation area A enters the negative pressure gas collection box 30 through the air outlet 32, and then is conveyed to the triangular area through the exhaust pipeline 31 to participate in the recirculation of the air distribution system.
As shown in fig. 5, when a local isolation function needs to be implemented in the cabin, the shutoff valve 13 in the high-pressure air curtain air supply subsystem I is opened, the booster fan 12 is started, the pressure head of the air flow in the high-pressure air curtain air supply pipeline 10 is raised under the pressurization effect of the booster fan 12, and then an air curtain isolation area a is formed in a defined area range through the high-pressure air curtain air supply port 11. Meanwhile, after the booster fan 12 is started, the original air distribution system can automatically realize the dynamic flow balance between the high-pressure air curtain air supply pipeline 10 and each air supply branch pipe 21. The shutoff valve 34 of the negative pressure gas collection and exhaust subsystem II is closed, the shutoff valve 34' is opened, the air in the isolation area A enters the negative pressure gas collection box 30 through the air outlet 32, and then is conveyed to the exhaust valve 33 through the exhaust pipeline 31 and directly exhausted outside the machine.
The present invention is described in detail with reference to the accompanying drawings, and it will be understood by those skilled in the art that the negative pressure isolation system for a vehicle cabin according to the present invention can realize various functional modes such as isolation, direct current air supply, negative pressure air collection, and on-demand air exhaust, respectively or simultaneously, and is connected to an air distribution system and an independent air exhaust system of an original ventilation system of a vehicle, such as an airplane, without significantly increasing the weight of the vehicle and without occupying the cabin space.
Further, it will be appreciated by those skilled in the art that while the inventive concept has been described above with reference to specific embodiments, the invention is not limited to the specific constructions of the embodiments, and that variations, modifications, or other equivalent constructions can be made without departing from the inventive concept within the scope of the present invention.
Claims (12)
1. A negative pressure isolation system for a vehicle cabin comprises a high-pressure air curtain air supply subsystem and a negative pressure air collection exhaust subsystem; wherein:
the high-pressure air curtain air supply subsystem can be arranged in a ceiling of a cabin of a vehicle and comprises a high-pressure air curtain air supply pipeline, a high-pressure air curtain air supply port and a booster fan, wherein the booster fan is arranged on the high-pressure air curtain air supply pipeline to increase the pressure head of airflow; one side of the high-pressure air curtain air supply pipeline is connected with a main air supply pipeline of a vehicle air distribution system, the high-pressure air curtain air supply port is arranged at the other side of the high-pressure air curtain air supply pipeline, and an air curtain from top to bottom is formed by air flow sent out by the high-pressure air curtain air supply port to form an isolation area;
the negative pressure gas collection and air exhaust subsystem can be arranged below the floor of a cabin of a vehicle and comprises a negative pressure gas collection tank, an air exhaust pipeline, an air outlet and an air exhaust valve, wherein one side of the air exhaust pipeline is connected with the negative pressure gas collection tank, and the other side of the air exhaust pipeline is connected with the air exhaust valve; the air outlet is arranged at the top of the negative pressure air collection box;
the negative pressure gas collection box is arranged on an area corresponding to the gas curtain isolation area formed by the high-pressure gas curtain gas supply port.
2. The vehicle cabin negative pressure isolation system of claim 1, wherein the high pressure air curtain supply subsystem further comprises a shutoff valve disposed on the high pressure air curtain supply duct to control communication with a main supply duct of a vehicle air distribution system.
3. The vehicle cabin negative pressure isolation system of claim 2, wherein the booster fan is configurable to be in linkage with the shutoff shutter, the booster fan being active when the shutoff shutter is open and inactive when the shutoff shutter is closed.
4. The vehicle cabin negative pressure isolation system of claim 1, wherein the high pressure air curtain air supply port is disposed in a ceiling of the vehicle cabin and has a slotted or perforated array arrangement.
5. The vehicle cabin negative pressure isolation system of claim 1, wherein the high pressure curtain air supply subsystem further comprises a dc air supply port connectable to a supply leg of a vehicle air distribution system and located above the cabin to directly supply air into the curtain isolation zone formed by the high pressure curtain air supply port.
6. The vehicle cabin negative pressure isolation system of claim 5, wherein the direct current air supply vent is a vehicle cabin air supply vent.
7. The vehicle cabin negative pressure isolation system of claim 5, wherein the DC supply port is in the form of a multi-tuyere array.
8. The vehicle cabin negative pressure isolation system of claim 1, wherein the negative pressure plenum is an enclosed space having a top formed by a vehicle cabin floor and a bottom formed by a vehicle floor sandwich panel, and further comprising side dams vertically arranged to bound the air curtain isolation zone.
9. The vehicle cabin negative pressure isolation system of claim 1, wherein the air outlet is disposed at the top of the negative pressure gas collection box and opens into the negative pressure gas collection box, and is arranged opposite to the high pressure air curtain air supply port in the up-down direction.
10. The vehicle cockpit negative pressure isolation system of claim 1 wherein the vehicle is an aircraft and the exhaust duct is Y-shaped and has one side connected to the negative pressure plenum and one side connected to the exhaust valve being a diverging side, leading to a delta of an aircraft exhaust system for delivering exhaust from the negative pressure plenum to the delta to participate in on-board air circulation and leading to the exhaust valve for exhausting exhaust from the negative pressure plenum out of the aircraft.
11. The vehicle cabin negative pressure isolation system of claim 1, wherein the negative pressure air collection and exhaust subsystem further comprises shutoff flaps, each disposed on the diverging sides of the exhaust duct.
12. The cabin negative pressure isolation system of claim 1, wherein the vehicle comprises a train, a bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210087382.0A CN114291269A (en) | 2022-01-25 | 2022-01-25 | Negative pressure isolation system for vehicle cabin |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210087382.0A CN114291269A (en) | 2022-01-25 | 2022-01-25 | Negative pressure isolation system for vehicle cabin |
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| CN114291269A true CN114291269A (en) | 2022-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210087382.0A Pending CN114291269A (en) | 2022-01-25 | 2022-01-25 | Negative pressure isolation system for vehicle cabin |
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