阅读说明：本技术 一种fpso的空气循环系统及空气循环方法 (FPSO air circulation system and air circulation method ) 是由 刘振 蔡志君 吴毅昊 龚舟妮 于 2020-08-05 设计创作，主要内容包括：本发明公开了一种FPSO的空气循环系统及空气循环方法,其用于FPSO的生活楼中,该空气循环系统包括：采风系统,用于从外界抽送新风；回风系统,用于对舱内空气进行混合循环；送风系统,用于向舱内各处送风；排风系统,用于将舱内空气排至外界；系统控制装置,电连接于上述各系统,上述各系统的风管相同,风量的值等于单位时间与风速的值和风管截面面积的乘积,系统控制装置能够持续检测并调节上述各系统的风速,使采风系统的新风量和回风系统的回风量之和等于送风系统的送风量,送风系统的送风量和回风系统的回风量之和小于送风系统的送风量,从而在舱内和舱外之间形成正压,外界的气体就很难进入舱内,提高了生活区域的安全性。(The invention discloses an air circulation system and an air circulation method of an FPSO (floating production storage and offloading), which are used in a living building of the FPSO, and the air circulation system comprises: the wind collecting system is used for pumping fresh air from the outside; the air return system is used for mixing and circulating air in the cabin; the air supply system is used for supplying air to all places in the cabin; the exhaust system is used for exhausting the air in the cabin to the outside; the system control device is electrically connected with the systems, the air pipes of the systems are the same, the air quantity value is equal to the product of the value of unit time and the air speed and the sectional area of the air pipe, the system control device can continuously detect and adjust the air speed of the systems, the sum of the fresh air quantity of the air collecting system and the return air quantity of the return air system is equal to the air supply quantity of the air supply system, and the sum of the air supply quantity of the air supply system and the return air quantity of the return air system is smaller than the air supply quantity of the air supply system, so that positive pressure is formed between the inside and the outside of the cabin, outside air is difficult to enter the cabin, and the safety of a.)

1. An air circulation system of an FPSO, the air circulation system being used in a living building of the FPSO, the air circulation system comprising:

the air collecting system is used for pumping fresh air from the outside to the space in the cabin of the living building;

the air return system is used for mixing and recycling air in the cabin space;

an air supply system for supplying air to various parts of the cabin space;

an exhaust system for exhausting air of the cabin space to the outside,

the air circulation system also comprises a system control device, the air collecting system, the air return system, the air supply system and the air exhaust system are electrically connected with the system control device, the air pipes of the air collecting system, the air return system, the air supply system and the air exhaust system are the same, the value of the air quantity is equal to the product of the value of the unit time and the air speed and the area of the cross section of the air pipe,

the system control device can continuously detect the wind speeds of the wind collection system, the return wind system, the air supply system and the air exhaust system, and adjust the wind speeds of the wind collection system, the return wind system, the air supply system and the air exhaust system according to detection results, so that the sum of the fresh air quantity of the wind collection system and the return wind quantity of the return wind system is equal to the value of the air supply quantity of the air supply system, and the sum of the return wind quantity of the return wind system and the air exhaust quantity of the air exhaust system is smaller than the value of the air supply quantity of the air supply system.

2. The FPSO air circulation system of claim 1 wherein the air collection system includes two air collection ports, the air collection system communicates the cabin space with the outside through the air collection ports, and the two air collection ports are respectively provided at the top of the living building in the ship width direction.

3. The FPSO air circulation system of claim 2 wherein each of the extraction openings is internally provided with an airtight device comprising a gas probe and an airtight damper, the gas probe and the airtight damper being electrically connected, the gas probe being used for detecting the type or content of gas in the extraction opening, and the airtight damper being used for closing or opening the extraction opening.

4. The FPSO air circulation system recited in claim 1 wherein the cabin space comprises a plurality of living quarters, and the return air inlet of the return air system, the supply air outlet of the supply air system and the exhaust air outlet of the exhaust air system are connected to the interior of each of the living quarters.

5. The FPSO air circulation system recited in claim 4 wherein the supply air outlet and the return air outlet are adjacent to the outside with respect to the exhaust air outlet inside the living room.

6. An air circulation system for an FPSO as claimed in claim 4 wherein the cabin space further comprises a plurality of functional compartments, at least two sets of said air circulation systems being located within said functional compartments and each set of said air circulation systems being located independently of each other.

7. The air circulation system of an FPSO according to claim 4 wherein the cabin space further comprises a plurality of lanes, at least two sets of the air circulation systems being provided inside the lanes, and each set of the air circulation systems being provided independently of each other.

8. An air circulation method of an FPSO for a living building of the FPSO, wherein the air circulation method uses the air circulation system of the FPSO according to any one of claims 1 to 7, wherein the air circulation method comprises the steps of:

the air circulation system is opened, the air collecting system, the return air system, the air supply system and the exhaust system are started to run through the system control device, and the air supply quantity is V_SThe return air volume is V_RThe air exhaust amount is V_EThe fresh air volume is V_F；

The system control device continuously detects the wind speeds of the air return system, the air supply system, the wind collection system and the air discharge system, and calculates V according to the detection result_FAnd V_RSum of (D) and V_SValue magnitude relation of, and V_EAnd V_RSum of (D) and V_SThe relationship between the magnitude of the value of (c),

when V is_FAnd V_RSum of (D) and V_SWhen the values are not equal, the system control device adjusts the wind speeds of the air return system, the air supply system and the wind collection system to ensure that V is equal to V_FAnd V_RSum of (D) and V_SThe values of (d) remain equal; when V is_EAnd V_RIs not less than V_SWhen the value of V is less than the preset value, the system control device adjusts the wind speeds of the air return system, the air supply system and the air exhaust system to ensure that V is equal to the preset value_FAnd V_RIs less than V_SThe value of (c).

9. A method for air circulation of an FPSO as claimed in claim 8,

V_S-(V_R+V_E)＝aV_S

wherein the value of a is 5 to 10 percent.

10. The method of air circulation for an FPSO recited in claim 9, wherein the cabin space comprises a corridor, the corridor being in communication with only the air supply system, the air circulation system further comprising a pressure monitoring device disposed in communication with the outside of the corridor, the pressure monitoring device comprising a pressure sensor and an alarm, the pressure sensor being in electrical or signal communication with the alarm, the pressure sensor being adapted to sense the pressure of the corridor relative to the outside, and the pressure monitoring device being electrically connected to the system control means, the method further comprising the steps of:

when the pressure sensor measures that the pressure inside the corridor is smaller than 50Pa, the pressure sensing device can transmit a sensing signal to the alarm, the alarm can be started and gives an alarm, the pressure sensing device simultaneously transmits the sensing signal to the system control device, and the system control device adjusts the wind speed of the air supply system and increases the value of a.

Technical Field

The invention relates to design planning of an FPSO (floating production storage and offloading) system, in particular to an air circulation system and an air circulation method of the FPSO system.

Background

The general purpose FPSO is used as a floating production and storage Facility (FPSO) with a brand new concept, has the universality characteristic, can be used for meeting various user requirements, and has the characteristics of being suitable for various sea areas, various working conditions, various mooring modes and oil transportation modes. The FPSO is exposed to a high degree of danger due to its particular application environment and may be contaminated with surrounding toxic or flammable air. Because the ship type is a new concept ship type, no design method of the ship type can be adopted for reference, and the living area further reflects the individual requirements of a shipowner or an operator, and does not have the characteristic of avoiding the defects.

Disclosure of Invention

The invention aims to solve the technical problem that the safety is low because the outside can flow into a cabin in a living building if harmful gas exists in the outside due to the fact that the traditional living building of an FPSO in the prior art does not consider the communication condition with the outside, and provides an air circulation system and an air circulation method of the FPSO.

The invention solves the technical problems through the following technical scheme:

an air circulation system of an FPSO, the air circulation system is used in a life building of the FPSO, and is characterized in that the air circulation system comprises:

the air collecting system is used for pumping fresh air from the outside to the space in the cabin of the living building;

the air return system is used for mixing and recycling air in the cabin space;

an air supply system for supplying air to various parts of the cabin space;

an exhaust system for exhausting air of the cabin space to the outside,

the air circulation system also comprises a system control device, the air collecting system, the air return system, the air supply system and the air exhaust system are electrically connected with the system control device, the air pipes of the air collecting system, the air return system, the air supply system and the air exhaust system are the same, the value of the air quantity is equal to the product of the value of the unit time and the air speed and the area of the cross section of the air pipe,

the system control device can continuously detect the wind speeds of the wind collection system, the return wind system, the air supply system and the air exhaust system, and adjust the wind speeds of the wind collection system, the return wind system, the air supply system and the air exhaust system according to detection results, so that the sum of the fresh air quantity of the wind collection system and the return wind quantity of the return wind system is equal to the value of the air supply quantity of the air supply system, and the sum of the return wind quantity of the return wind system and the air exhaust quantity of the air exhaust system is smaller than the value of the air supply quantity of the air supply system.

The air circulating system of the FPSO adjusts the wind collecting system, the return air system, the air supply system and the air speed of the exhaust system of the ventilation circulating system through the system control device, the sum of the fresh air volume and the return air volume is equal to the value of the air supply volume, the sum of the exhaust air volume and the return air volume is smaller than the value of the air supply volume, the air volume in the cabin is continuously larger than the air volume flowing out of the cabin due to the arrangement, a positive pressure is formed between the inside and the outside of the cabin, and due to the existence of the positive pressure, the gas in the external low-pressure environment is difficult to enter the high-pressure environment in the cabin, so that the possibility of avoiding the external harmful gas from entering the cabin is solved, and the safety of a living area.

Preferably, the wind collection system comprises two wind collection ports, the wind collection system is communicated with the space in the cabin and the outside through the wind collection ports, and the two wind collection ports are respectively arranged at the top of the living building along the ship width direction. The air intake is arranged at the top of the highest position of the living building, so that outside fresh air can be conveniently introduced, and the air intake is farthest away from a working area and has the lowest probability of being polluted, so that the availability of the fresh air can be ensured to the maximum extent.

Preferably, an airtight device is arranged inside each air extraction opening, the airtight device comprises a gas probe and an airtight air brake, the gas probe and the airtight air brake are electrically connected, the gas probe is used for detecting the type or content of gas in the air extraction opening, and the airtight air brake is used for closing or opening the air extraction opening. The setting of gas tightness device is in order to realize closing the air intake system with external intercommunication, and gas probe is used for surveying gas type or content, and when the air intake of arbitrary side had the flammable or polluted gas when appearing dangerous situation because of the external world, gas probe transmission signal to airtight damper, airtight damper closed, cuts off the air intake system, and meanwhile, the safe air intake of opposite side still can normally work to ensure the guarantee of fresh air supply.

Preferably, the cabin space includes a plurality of living cabins, and the return air inlet of the return air system, the supply air outlet of the supply air system and the exhaust air outlet of the exhaust air system are communicated to the inside of each living cabin. The living cabin refers to a crewman living space such as a living room, an office, and the like.

Preferably, inside the living room, the air supply opening and the air return opening are close to the outside with respect to the air exhaust opening. According to the arrangement, air in the room can be circulated, and meanwhile, the air pressure close to two sides of the outer cabin wall is higher than the pressure outside the cabin.

Preferably, the cabin space further comprises a plurality of functional cabins, at least two groups of the air circulation systems are arranged inside the functional cabins, and each group of the air circulation systems are arranged independently. The function cabin refers to the inside operating space of life building, for example kitchen, air conditioner room etc. the function cabin sets up two sets of at least air circulation system, because the cabin is comparatively important, and the convection current demand is higher, consequently, can improve the convection current circulation effect of high temperature environment in this type cabin on the one hand, and on the other hand can further guarantee the ventilation reliability, and the ventilation circulation in the function cabin can not be influenced in the damage of one set of system wherein.

Preferably, the cabin space further comprises a plurality of ladder ways, at least two sets of the air circulation systems are arranged in the ladder ways, and each set of the air circulation systems are arranged independently. The ladder way is used as a main escape passage and needs to be provided with a set of standby air circulation system so as to avoid the danger that the escape of crews is influenced due to the fault when only one set of circulation system is arranged.

An air circulation method of an FPSO for a living building of the FPSO, wherein the air circulation method uses the air circulation system of the FPSO as described above, wherein the air circulation method comprises the steps of:

the air circulation system is opened, the air collecting system, the return air system, the air supply system and the exhaust system are started to run through the system control device, and the air supply quantity is V_SThe return air volume is V_RThe air exhaust amount is V_EThe fresh air volume is V_F；

The system control device continuously detects the wind speeds of the air return system, the air supply system, the wind collection system and the air discharge system, and calculates V according to the detection result_FAnd V_RSum of (D) and V_SValue magnitude relation of, and V_EAnd V_RSum of (D) and V_SThe relationship between the magnitude of the value of (c),

when V is_FAnd V_RSum of (D) and V_SWhen the values are not equal, the system control device adjusts the wind speeds of the air return system, the air supply system and the wind collection system to ensure that V is equal to V_FAnd V_RSum of (D) and V_SThe values of (d) remain equal; when V is_EAnd V_RIs not less than V_SWhen the value of V is less than the preset value, the system control device adjusts the wind speeds of the air return system, the air supply system and the air exhaust system to ensure that V is equal to the preset value_FAnd V_RIs less than V_SThe value of (c).

According to the air circulation method of the FPSO, the air circulation system of the FPSO is utilized to adjust the air speeds of the air return system, the air supply system, the air collection system and the air exhaust system, and the system control device is used for continuously detecting and adjusting the air speeds of the systems, so that the air speeds are controlled, the positive pressure state of the inner cabin and the outer cabin is realized, and the possibility of preventing external harmful gas from entering the cabin is solved.

Preferably, the first and second liquid crystal films are made of a polymer,

V_S-(V_R+V_E)＝aV_S

wherein the value of a is 5 to 10 percent.

The value of a is set to be 5% -10%, a relatively comfortable pressure state can be formed, and the pressure difference is prevented from being too high.

Preferably, the cabin interior space includes a corridor, the corridor is only communicated with the air supply system, the air circulation system further includes a pressure monitoring device, the pressure monitoring device is disposed at a communication position between the corridor and the outside, the pressure monitoring device includes a pressure sensor and an alarm, the pressure sensor and the alarm are electrically connected or in signal connection, the pressure sensor is used for detecting the pressure of the corridor relative to the outside, and the pressure monitoring device is electrically connected to the system control device, the air circulation method includes the following steps:

when the pressure sensor measures that the pressure inside the corridor is smaller than 50Pa, the pressure sensing device can transmit a sensing signal to the alarm, the alarm can be started and gives an alarm, the pressure sensing device simultaneously transmits the sensing signal to the system control device, and the system control device adjusts the wind speed of the air supply system and increases the value of a.

The corridor is only provided with the air supply system, the innermost pressure of the living building is higher relative to the position close to the outer bulkhead, the positive pressure effect is further guaranteed, in addition, the pressure monitoring device can also continuously detect the pressure inside the corridor and is connected with the system control device, so that the air speed of the air supply system can be adjusted when the pressure is too small, and the pressure state is improved.

On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.

The positive progress effects of the invention are as follows:

the air circulation system and the air circulation method of the FPSO provided by the invention detect and adjust the wind speeds of the air collecting system, the air return system, the air supply system and the air exhaust system of the ventilation circulation system through the system control device, so that the sum of the fresh air quantity and the return air quantity is equal to the value of the air supply quantity, the sum of the air exhaust amount and the air return amount is smaller than the value of the air supply amount, and the air speed of each system is continuously detected and adjusted through a system control device, so that the air speed is controlled, the positive pressure state of the inner cabin and the outer cabin is realized, because the arrangement ensures that the air quantity in the cabin is continuously larger than the air quantity flowing out of the cabin, a positive pressure is formed between the inside and the outside of the cabin, the air in the external low-pressure environment is difficult to enter the high-pressure environment in the cabin, thereby, the possibility of preventing external harmful gas from entering the cabin is solved, and the safety of the living area is improved.

Drawings

FIG. 1 is a schematic structural diagram of an FPSO air circulation system according to a preferred embodiment of the invention.

FIG. 2 is a schematic structural diagram of an FPSO air circulation system according to a preferred embodiment of the invention.

FIG. 3 is a flow chart illustrating an FPSO air circulation method according to a preferred embodiment of the invention.

Description of reference numerals:

wind collecting system 1

Air intake 11

Gas-tight device 12

Return air system 2

Air return opening 21

Air supply system 3

Air supply outlet 31

Air exhaust system 4

Air outlet 41

System control device 5

Living cabin 6

Corridor 7

Pressure monitoring device 8

Buffer chamber 9

Living building 10

Detailed Description

The present invention will be more clearly and completely described below by way of a preferred embodiment in conjunction with the accompanying drawings, without thereby limiting the scope of the invention to the described embodiment.

As shown in fig. 1-2, the present embodiment provides an air circulation system and an air circulation method of an FPSO, which is applied to a living building 10 of the FPSO, wherein the air circulation system includes:

the air collecting system 1 is used for pumping fresh air from the outside to the cabin space of the living building 10;

the air return system 2 is used for mixing and recycling air in the cabin space;

the air supply system 3 is used for supplying air to all positions of the space in the cabin;

an exhaust system 4, the exhaust system 4 is used for exhausting the air in the cabin space to the outside,

the air ducts of the air collecting system 1, the air return system 2, the air supply system 3 and the air exhaust system 4 have the same specification, that is, the cross-sectional areas of the air ducts are the same. On the basis, the value of the air volume is equal to the product of the value of the wind speed and the sectional area of the wind pipe in unit time. In fig. 1 and 2, the communication mode and position of each system are represented by a pipeline.

The air circulation system also comprises a system control device 5, the air collection system 1, the air return system 2, the air supply system 3 and the air exhaust system 4 are electrically connected to the system control device 5, the system control device 5 can continuously detect the wind speeds of the air collection system 1, the air return system 2, the air supply system 3 and the air exhaust system 4, and adjust the wind speeds of the air collection system 1, the air return system 2, the air supply system 3 and the air exhaust system 4 according to detection results, so that the sum of the fresh air quantity of the air collection system 1 and the return air quantity of the air return system 2 is equal to the value of the air supply quantity of the air supply system 3, and the sum of the air exhaust quantity of the air exhaust system 4 and the return air quantity of the air return system 2 is smaller than the value of the.

As shown in fig. 3, the present embodiment further provides an air circulation method of an FPSO, which uses the air circulation system of the FPSO, and the air circulation method includes the following steps:

step 101, opening an air circulation system, and starting a wind collection system 1, an air return system 2, an air supply system 3 and an exhaust system 4 to run through a system control device 5, wherein the air supply volume of the air supply system 3 is V_SReturn air of return air system 2Amount is V_RThe exhaust volume of the exhaust system 4 is V_EThe fresh air volume of the air collecting system 1 is V_F；

Step 102, the system control device 5 continuously detects the wind speeds of the air return system 2, the air supply system 3, the wind collection system 1 and the air exhaust system 4, and calculates V according to the detection result_FAnd V_RSum of (D) and V_SValue magnitude relation of, and V_EAnd V_RSum of (D) and V_SThe relationship between the magnitude of the value of (c),

when V is_FAnd V_RSum of (D) and V_SWhen the values are not equal, the system control device 5 adjusts the wind speed of the air return system 2 and/or the air supply system 3 and/or the wind collection system 1 to ensure that V is equal to V_FAnd V_RSum of (D) and V_SThe values of (d) remain equal; when V is_EAnd V_RIs not less than V_SWhen the value of (A) is less than the predetermined value, the system control device 5 adjusts the wind speeds of the return air system 2, the air supply system 3 and the exhaust system 4 so that V is equal to V_FAnd V_RIs less than V_SThe value of (c).

In the embodiment, the wind pipes of the wind collection system 1, the air return system 2, the air supply system 3 and the air exhaust system 4 have the same specification, and the value of the wind volume is equal to the product of the value of the wind speed and the sectional area of the wind pipe in unit time. Therefore, on the basis of the same unit time and the same cross-sectional area of the air pipes, when the air quantities of the air return system 2, the air supply system 3, the air collection system 1 and the air exhaust system 4 are detected and adjusted, the air speed and the corresponding sum or the corresponding size relation can be completely compared. Therefore, the system control device 5 in this embodiment may directly monitor the wind speed, and the corresponding relationship between the two wind rates may be maintained by using the wind speed sensor and the calculation module.

The FPSO air circulation system is combined with an air circulation method, the wind speed of a wind collecting system 1, a return air system 2, an air supply system 3 and an air exhaust system 4 of a ventilation circulation system is adjusted through a system control device 5, the sum of the fresh air quantity and the return air quantity is equal to the value of the air supply quantity, the sum of the air exhaust quantity and the return air quantity is smaller than the value of the air supply quantity, the air quantity in the cabin is continuously larger than the air quantity flowing out of the cabin due to the arrangement, a positive pressure is formed between the inside and the outside of the cabin, and the air in the external low-pressure environment is difficult to enter the high-pressure environment in the cabin due to the existence of the positive pressure, so that the possibility of avoiding the external harmful gas from entering the cabin is solved, and the safety of.

Further, the air conditioner is provided with a fan,

V_S-(V_R+V_E)＝aV_S

wherein the value of a is 5 to 10 percent.

The value of a is set to be 5% -10%, a relatively comfortable pressure state can be formed, and the pressure difference is prevented from being too high. In this embodiment, the system control device 5 may adopt the value of one of a, or may set the value as a range value, and when a is kept between 5% and 10%, the system control device 5 maintains its control value for the current wind speed.

In addition, in the present embodiment, the wind extraction system 1 is provided with two wind extraction ports 11, the wind extraction system 1 communicates the cabin space with the outside through the wind extraction ports 11, and the two wind extraction ports 11 are respectively provided at the top of the living building 10 along the ship width direction. The air intake 11 is arranged at the top of the highest position of the living building 10, so that outside fresh air can be conveniently introduced, and the air intake is farthest away from the working area and has the lowest probability of being polluted, so that the availability of the fresh air can be ensured to the greatest extent.

Further, an airtight device 12 is arranged inside each air intake 11, the airtight device 12 comprises a gas probe and an airtight air brake, the gas probe and the airtight air brake are electrically connected, the gas probe is used for detecting the type or content of gas in the air intake 11, and the airtight air brake is used for closing or opening the air intake 11. The setting of gas tightness device 12 is in order to realize closing the wind production system 1 with external intercommunication, and the gas probe is used for surveying gas type or content, and when the wind production mouth 11 of arbitrary side had the flammable or polluted gas when appearing dangerous situation because of the external existence, the gas probe transmission signal to airtight damper, and airtight damper closes, cuts off wind production system 1, and simultaneously, the safe wind production mouth 11 of opposite side still can normally work to ensure the guarantee of fresh air supply.

The cabin space includes a plurality of living cabins 6 and a plurality of functional cabins (not shown in the figure), and the return air inlet 21 of the return air system 2, the air supply outlet 31 of the air supply system 3 and the air outlet 41 of the exhaust system 4 are communicated to the inside of each living cabin 6. The living cabin 6 refers to a crewman living space such as a living room, an office, and the like. Inside the living room 6, the supply port 31 and the return port 21 are close to the outside with respect to the exhaust port 41, and the exhaust port 41 of the exhaust system 4 is close to the corridor 7. The arrangement enables air in the room to be circulated, and meanwhile, the air pressure close to the two sides of the outer cabin wall is higher than the pressure outside the cabin.

At least two groups of air circulation systems are arranged in the functional cabin, and each group of air circulation systems are arranged independently. The functional compartment refers to an operation space inside the living building 10, such as a kitchen, an air conditioner room, and the like. The function cabin sets up two sets of at least air circulation system, because the cabin is comparatively important, and the convection current demand is higher, consequently, can improve the convection current circulation effect of high temperature environment in this type cabin on the one hand, and on the other hand can further guarantee the ventilation reliability, and the ventilation circulation in the function cabin can not be influenced in the damage of one set of system among them.

The cabin space further comprises a plurality of stairways (not shown in the figure) and a corridor 7, at least two groups of air circulation systems are arranged in the stairways, and each group of air circulation systems are arranged independently. The ladder way is generally arranged near the side wall of the cabin, and is used as a main escape passage, and a set of standby air circulation system is required to be arranged so as to avoid the danger that the escape of crews is influenced due to the fault when only one set of circulation system is arranged. The corridor 7 is only provided with the air supply system 3, which is more beneficial to the fact that the innermost pressure of the living building 10 is higher relative to the position close to the outer bulkhead, so that the positive pressure effect is further ensured, in addition, the pressure monitoring device 8 can also continuously detect the pressure inside the corridor 7 and is connected with the system control device 5, so that the air speed of the air supply system 3 can be adjusted when the pressure is too low, and the pressure state is improved. A buffer chamber 9 is arranged at each communication position of the corridor 7 and the outside, and the buffer chamber 9 is only communicated with the air supply system 3. The buffer chamber 9 is used for buffering strong air convection generated by suddenly increasing the communication with the outside when a crewman goes out or enters from both ends of the corridor 7, and the buffer chamber 9 is prevented from being directly connected to the inside of the corridor 7 to disturb the air circulation and dynamic balance inside the whole life building 10.

The air circulation system further comprises a pressure monitoring device 8, the pressure monitoring device 8 is arranged at a communication position of the corridor 7 and the outside, the pressure monitoring device 8 comprises a pressure sensor and an alarm, the pressure sensor and the alarm are electrically connected or in signal connection, the pressure sensor is used for detecting the pressure of the corridor 7 relative to the outside, and the pressure monitoring device 8 is electrically connected to the system control device 5. On this basis, step 102 of the air circulation method of the present embodiment further includes the following steps:

103, when the pressure sensor measures that the pressure inside the corridor 7 is smaller than 50Pa, the pressure sensing device can transmit a sensing signal to the alarm, the alarm can be started and gives an alarm, the pressure sensing device simultaneously transmits the sensing signal to the system control device 5, the system control device 5 adjusts the wind speed of the air supply system 3, and the value of a is increased.

While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.