A control method and control system for a transfer isolation cabin

Abstract

The present invention discloses a control method and control system for a transfer isolation cabin. Specifically, it includes hardware devices such as air inlet and outlet fans, flow valves, pressure differential sensors, programmable logic controllers, and software logic control to realize functions such as negative pressure isolation, high-efficiency filtration, environmental monitoring and abnormal alarms. The negative pressure control system of the aviation transfer isolation cabin has three main functional modules: cabin pressure automatic compensation control, room door interlocking logic control, and oxygen support system status monitoring. Thereby, functions such as cabin pressure automatic compensation, room door interlocking, environmental monitoring and abnormal alarms are realized. In the case of airborne transfer, the pressure and pressure difference in the transfer isolation cabin are maintained within a suitable range, providing patients in the cabin with a relatively comfortable transfer medical environment while ensuring that the virus does not spread. The negative pressure control system has certain versatility and is also suitable for vehicle-mounted and fixed-location negative pressure isolation application scenarios.

Description

Technical Field

[0001] The present application relates to the technical field of biosafety prevention, and in particular to an aviation transport isolation cabin and a negative pressure control system. Background Art

[0002] The existing aviation transfer isolation cabins cannot achieve negative pressure isolation and high-efficiency filtration, and new transfer isolation cabins need to be designed. Summary of the Invention

[0003] The present application provides an aviation transfer isolation cabin and a negative pressure control system, the purpose of which is to enable the transfer isolation cabin to have functions such as negative pressure isolation, high-efficiency filtration, environmental monitoring and abnormal alarm.

[0004] In a first aspect, a transport isolation cabin is provided, comprising a patient admission room, a clothing changing room, and a buffer room, wherein the clothing changing room is located between the patient admission room and the buffer room, the air pressure in the patient admission room is lower than the air pressure in the clothing changing room, and the air pressure in the clothing changing room is lower than the air pressure in the buffer room; the transport isolation cabin further comprises:

[0005] an air blower, the air blower being used to supply air to the buffer room;

[0006] An exhaust fan is used to exhaust the air in the patient treatment room, and the exhaust volume of the exhaust fan is used to adjust the overall pressure level of the transfer isolation cabin.

[0007] In conjunction with the first aspect, in certain implementations of the first aspect, the transfer isolation cabin further includes:

[0008] an air supply channel, the air supply channel comprising a first air supply port facing the buffer room and a second air supply port facing the patient admission room, the air supply fan being used to supply air to the buffer room through the first air supply port, and the air supply fan being further used to supply air to the patient admission room through the second air supply port;

[0009] A flow valve is provided between the first air supply port and the second air supply port, and is used to control the gas flow entering the patient treatment room and the buffer room respectively.

[0010] In combination with the first aspect, in certain implementations of the first aspect, the transfer isolation cabin also includes a first louver fan and a second louver fan; the first louver fan is arranged between the clothing changing room and the patient treatment room, and is used to control the gas flow from the clothing changing room to the patient treatment room; the second louver fan is arranged between the clothing changing room and the buffer room, and is used to control the gas flow from the buffer room to the clothing changing room.

[0011] In conjunction with the first aspect, in certain implementations of the first aspect, the transfer isolation cabin further includes:

[0012] a first door, the first door being arranged on a side of the patient admission room away from the nursing clothing changing room;

[0013] a second door, the second door being arranged between the nursing clothing changing room and the patient admission room;

[0014] A third door, the third door being arranged between the clothing changing room and the buffer room;

[0015] a fourth door, the fourth door being arranged on a side of the buffer room away from the clothing changing room;

[0016] Wherein, when a target door among the first door, the second door, the third door and the fourth door is opened, the adjacent doors of the target door are in a closed state.

[0017] In conjunction with the first aspect, in certain implementations of the first aspect, the transfer isolation cabin further includes:

[0018] An oxygen cylinder and an oxygen cylinder pressure sensor, wherein the oxygen cylinder is arranged in the patient admission room, and the oxygen cylinder pressure sensor is used to detect the oxygen remaining in the oxygen cylinder;

[0019] An alarm device is used to alarm when the oxygen remaining in the oxygen cylinder is lower than a preset oxygen amount.

[0020] In a second aspect, a transport isolation cabin is provided, comprising a patient admission room, a clothing changing room, and a buffer room, wherein the clothing changing room is located between the patient admission room and the buffer room, the air pressure in the patient admission room is lower than the air pressure in the clothing changing room, and the air pressure in the clothing changing room is lower than the air pressure in the buffer room; the transport isolation cabin further comprises:

[0021] a first door, the first door being arranged on a side of the patient admission room away from the nursing clothing changing room;

[0022] a second door, the second door being arranged between the nursing clothing changing room and the patient admission room;

[0023] A third door, the third door being arranged between the clothing changing room and the buffer room;

[0024] a fourth door, the fourth door being arranged on a side of the buffer room away from the clothing changing room;

[0025] Wherein, when a target door among the first door, the second door, the third door and the fourth door is opened, the adjacent doors of the target door are in a closed state.

[0026] In a third aspect, a control method for a transfer isolation cabin is provided, the method being applied to the transfer isolation cabin as described in any one of the implementations of the first aspect above, the method comprising:

[0027] When the overall pressure level of the transfer isolation cabin is lower than the preset pressure level, reducing the exhaust volume of the exhaust fan;

[0028] When the overall pressure level of the transfer isolation cabin is greater than the preset pressure level, the exhaust volume of the exhaust fan is increased.

[0029] In conjunction with the third aspect, in certain implementations of the third aspect, the method is specifically applied to the transfer isolation cabin as described in the second implementation of the first aspect above, and the method further includes:

[0030] In the case where the pressure difference between the clothing changing room and the buffer room is greater than a first preset pressure difference, and / or in the case where the pressure difference between the patient admission room and the clothing changing room is greater than the first preset pressure difference, increasing the opening degree of the flow valve;

[0031] When the pressure difference between the clothing changing room and the buffer room is less than the second preset pressure difference, and / or when the pressure difference between the patient admission room and the clothing changing room is less than the second preset pressure difference, the opening degree of the flow valve is reduced.

[0032] In conjunction with the third aspect, in certain implementations of the third aspect, the method is specifically applied to the transfer isolation cabin as described in the third implementation of the first aspect above, and the method further includes at least one of the following:

[0033] When the pressure difference between the clothing changing room and the patient admission room is greater than a third preset pressure difference, increasing the opening degree of the first louver;

[0034] When the pressure difference between the clothing changing room and the patient admission room is less than a fourth preset pressure difference, reducing the opening degree of the first louver;

[0035] When the pressure difference between the clothing changing room and the buffer room is greater than a third preset pressure difference, reducing the opening degree of the second louver;

[0036] When the pressure difference between the clothing changing room and the buffer room is less than a fourth preset pressure difference, reducing the opening degree of the second louver;

[0037] The third preset pressure difference is different from the first preset pressure difference, and the fourth preset pressure difference is different from the second preset pressure difference.

[0038] In conjunction with the third aspect, in certain implementations of the third aspect, the method is specifically applied to the transfer isolation cabin as described in the fourth implementation in the first aspect above, and the method further includes:

[0039] When it is detected that the door opening button of the target door is pressed, the adjacent door of the target door is powered on and self-locked, and the target door is any one of the first door, the second door, the third door and the fourth door.

[0040] In conjunction with the third aspect, in certain implementations of the third aspect, the method is specifically applied to the transfer isolation cabin as described in the fifth implementation of the first aspect above, and the method further includes:

[0041] When the oxygen remaining in the oxygen cylinder is lower than the preset oxygen amount, an alarm is triggered.

[0042] In a fourth aspect, a method for controlling a transfer isolation cabin is provided, the method being specifically applied to the transfer isolation cabin as described in any one of the implementations of the second aspect above, the method further comprising:

[0043] When it is detected that the door opening button of the target door is pressed, the adjacent door of the target door is powered on and self-locked, and the target door is any one of the first door, the second door, the third door and the fourth door.

[0044] In a fifth aspect, a control system for a transfer isolation cabin is provided, characterized in that the control system is used to execute the control method described in any one of the implementation methods in the third to fourth aspects above.

[0045] Compared with the existing technology, the solution provided by this application includes at least the following beneficial technical effects:

[0046] (1) By adjusting the wind speed of the exhaust fan, the overall pressure level in the cabin relative to the outside world is achieved, thereby minimizing the spread of the virus.

[0047] (2) The pressure difference between the three rooms in the cabin is controlled by controlling the flow valve and the louver fan, which can compensate to a certain extent for the adverse effects on patients in the cabin caused by the change of onboard pressure.

[0048] (3) By controlling the flow valve and the louver fan in coordination, the pressure difference can be coarsely and finely controlled, thereby improving the efficiency and accuracy of the pressure difference regulation.

[0049] (4) Prevent the spread of microbial pathogens or contamination sources in the transfer isolation cabin through interlocking control between adjacent doors.

[0050] (5) By alarming when the oxygen pressure in the oxygen cylinder is too low, it is helpful to ensure sufficient oxygen supply for patients with infectious diseases. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 This is a block diagram of the principle of the negative pressure control system for the aviation transport isolation cabin of the present invention;

[0052] Figure 2 This is the wiring diagram of the negative pressure control system of the aviation transport isolation cabin of the present invention;

[0053] Figure 3 This is a flow chart of the automatic negative pressure compensation control of the present invention;

[0054] Figure 4 It is a flow chart of the room door interlock logic control of the present invention;

[0055] Figure 5 This is the flow chart for controlling the status lights of the room doors;

[0056] Figure 6 It is the control flow chart of the oxygen support system. DETAILED DESCRIPTION

[0057] The present application is described in further detail below with reference to the accompanying drawings and specific embodiments.

[0058] Figure 1 This is a schematic structural diagram of a transport isolation cabin provided in an embodiment of the present application. The transport isolation cabin is controlled by the negative pressure control system provided in an embodiment of the present application, which enables the transport isolation cabin to have functions such as negative pressure isolation, high-efficiency filtration, environmental monitoring, and abnormality alarm.

[0059] The transfer isolation cabin can include a patient admission room, a gown-changing room, and a buffer room. The gown-changing room can be connected between the patient admission room and the buffer room. The direction from the patient admission room to the buffer room is aligned with the heading of the transfer isolation cabin, minimizing the impact of external wind direction on the air flow within the cabin.

[0060] A door 1 may be provided on the side of the patient admission room away from the clothing changing room, through which the user can enter the patient admission room or exit the patient admission room through door 1. A door 2 is provided between the patient admission room and the clothing changing room, through which the user can move between the patient admission room and the clothing changing room. A door 3 is provided between the clothing changing room and the buffer room, through which the user can move between the clothing changing room and the buffer room. A door 4 may be provided on the side of the buffer room away from the clothing changing room, through which the user can enter the buffer room or exit the buffer room through door 4. The transfer isolation cabin may include four door-controlled switches for respectively controlling the opening and closing of doors 1 to 4.

[0061] The transfer isolation cabin may also include an air supply channel and an air blower. The air supply channel passes through the clothing changing room and the buffer room. The air blower may be arranged at one end of the air supply channel near the buffer room to blow outside air into the air supply channel.

[0062] The air supply channel has an air supply port 1 and an air supply port 2. The air supply port 1 is arranged facing the buffer room. The air supply port 2 is arranged facing the patient admission room. A flow valve and a wind speed sensor can also be arranged in the air supply channel. The wind speed sensor can be arranged between the air supply port 1 and the air blower to sense the gas flow blown into the air supply channel by the air blower. The flow valve can be arranged between the air supply port 1 and the air supply port 2 to control the gas flow entering the air supply port 2, and further to directly control the gas flow directly sent by the air blower into the patient admission room. The superposition of the flow valve and the wind speed sensor can be used to control the gas flow directly sent by the air blower into the buffer room.

[0063] The transfer isolation cabin may further include louver fans 1 and louver fans 2. Louver fan 1 is arranged between the patient admission room and the clothing changing room, and louver fan 2 is arranged between the clothing changing room and the buffer room. To increase the air flow distance in each room, louver fan 1 can be arranged on the wall between the patient admission room and the clothing changing room, and located on the side of the wall close to the air supply fan. Louver fan 2 can be arranged on the wall between the clothing changing room and the buffer room, and located on the side of the wall away from the air supply fan.

[0064] The transfer compartment may also include an exhaust fan. Figure 1 In the illustrated embodiment, two exhaust fans can be installed, each serving as a backup. The exhaust fan can be located diagonally opposite the patient admission room, away from the louvered fan 2 or the blower, to exhaust air from the patient admission room. The blower draws air into the transfer isolation cabin and exhausts it through the exhaust fan, with the general air flow going from the buffer room to the gowning room to the patient admission room.

[0065] The transfer isolation cabin may also include 3 differential pressure sensors and 1 pressure sensor. Differential pressure sensor 1 can be used to detect the pressure difference between the patient admission room and the gown changing room. Differential pressure sensor 2 can be used to detect the pressure difference between the gown changing room and the buffer room. Differential pressure sensor 3 can be used to detect the pressure difference between the buffer room and the outside world. The pressure sensor can be used to directly reflect the pressure in the buffer room. In other embodiments, the differential pressure sensor can be replaced with a pressure sensor. Since the pressure sensor can only detect the pressure in a single room, the function of the differential pressure sensor is to detect the pressure difference between adjacent rooms. One of the functions of the transfer isolation cabin is to ensure that the pressure difference between adjacent rooms is maintained at ≥15Pa, so using a differential pressure sensor is more intuitive and convenient.

[0066] The transfer isolation cabin can also include three temperature and humidity sensors. The three temperature and humidity sensors can be installed in the patient admission room, the nursing clothing changing room, and the buffer room to monitor the temperature and humidity in each room.

[0067] The transport isolation cabin may also include an alarm, which can be installed in the patient admission room to provide an alarm regarding the patient's treatment status. The alarm can also provide an alarm for other situations. The transport isolation cabin may also include a disinfection lamp, which can be installed in the patient admission room to disinfect the air in the patient admission room to reduce the amount of pathogens discharged from the patient admission room to the outside world.

[0068] The transport isolation cabin may also include an oxygen cylinder and an oxygen cylinder pressure sensor. The oxygen cylinder pressure sensor is used to detect whether the oxygen in the oxygen cylinder is too low, so as to alarm when the oxygen in the oxygen cylinder is too low, prompting the user to replace the oxygen cylinder in time.

[0069] As mentioned above, the sensors in the transport isolation cabin can collect the environmental data of the transport isolation cabin. Figure 2 As shown, the negative pressure control system can control the actuators of the transfer isolation cabin based on the data obtained by the real-time monitoring sensors to achieve functions such as negative pressure isolation, high-efficiency filtration, environmental monitoring and abnormal alarm. Specifically, in the negative pressure control mode, the negative pressure control system can control the speed of the intake and exhaust fans, the size of the flow valve and the opening and closing degree of the louver fans based on the collected sensor data such as pressure and pressure difference to maintain the pressure difference in the transfer isolation cabin within an appropriate range. When the environmental data is abnormal, the negative pressure control system can promptly alarm and perform logical interlock control on the cabin door to prevent the virus from spreading from the patient admission room to the nursing change room and buffer room, thereby ensuring the personal safety of medical staff. In the event of an emergency, the negative pressure control system can also perform emergency unlocking control on the cabin door.

[0070] The negative pressure control scheme is designed to be divided into three independent sub-control schemes: the first is the automatic cabin pressure compensation control scheme, the second is the room door interlock logic control scheme, and the third is the oxygen supply system status monitoring scheme. These three sub-control schemes are introduced below.

[0071] 1. The cabin pressure automatic compensation control scheme is as follows:

[0072] Due to its special application environment, the air flow direction of the three rooms in the transfer isolation cabin should be as follows: Figure 1 As shown; and in order to prevent the cabin pressure from having an adverse effect on the patient, it is necessary to maintain the atmospheric pressure in the transfer isolation cabin within a fixed range at different altitudes, that is, to achieve automatic negative pressure compensation.

[0073] The automatic negative pressure compensation control system utilizes a programmable logic controller (PLC) as the main controller. Its feedback signal detection device consists of three pressure differential sensors that detect pressure differentials between adjacent rooms within the cabin, and a pressure sensor that measures the cabin pressure. Based on the transfer compartment pressure data collected by the sensors, the cabin pressure and pressure differential are controlled by varying the operating states of the air intake fan, flow valve, two exhaust fans (one main exhaust fan and one backup exhaust fan), and two louvered fans.

[0074] Automatic negative pressure compensation control flow chart as follows Figure 3 As shown in the figure, the main controller collects sensor data in the transfer isolation chamber in real time and determines whether the sensors are functioning properly. If a sensor malfunctions and is unable to provide test data, the alarm device immediately sounds an alarm, alerting personnel to perform maintenance. Assuming all sensors are functioning properly, the pressure differential and pressure data detected by the sensors in the transfer isolation chamber are fed back to the main controller in real time for comparison and subtraction with the given values. The controller then controls the speed of the intake and exhaust fans, the size of the flow valves, and the opening and closing of the louvers to adjust the pressure inside the transfer isolation chamber and the pressure differential between adjacent rooms within the chamber, forming a closed-loop control system.

[0075] The overall pressure level inside the cabin relative to the outside world can be adjusted by adjusting the exhaust fan speed. When the cabin pressure is below the set value, the exhaust fan speed is reduced; when the cabin pressure is above the set value, the exhaust fan speed is increased. Under these conditions, adjusting the relative speed of the intake and exhaust fans can help adjust the pressure difference between the three rooms.

[0076] The pressure differential between the three rooms in the cabin is controlled by flow valves and louvers. The pressure differential is the difference in pressure between the two rooms and is achieved by maintaining a fixed direction of air flow. Because the exhaust fan speed is higher than the intake fan speed, the air flows from the buffer room to the gowning room to the patient admission room. The pressure differentials between the three rooms affect each other and are not independent of each other. The flow valve controls the amount of air flow between the three rooms. When the flow valve opening is wide, more air can flow through the overhead ducts, and less air can flow through the gowning room and the buffer room. Consequently, the pressure differential between the gowning room and the buffer room decreases. When the flow valve is wide open, more air can flow from the buffer room to the gowning room to the patient admission room, increasing the pressure differential between the rooms.

[0077] Louver fans, like flow valves, essentially control air flow. Compared to flow valves, louver fans provide more precise air flow control. Louver fan 1 controls the pressure differential between the patient admission room and the gown-changing room. Louver fan 2 controls the pressure differential between the gown-changing room and the buffer room.

[0078] When the pressure differential sensor detects an excessively large pressure difference between adjacent rooms, the flow valve opens wider to reduce it. When the sensor detects an excessively small pressure difference, the flow valve closes narrower to increase it. Throughout this process, the flow valve coordinates with the real-time adjustment of the louver opening to further regulate the pressure differential between the three cabin rooms.

[0079] In one embodiment, the pressure difference range for controlling the flow valve is from preset pressure difference 1 to preset pressure difference 3. The pressure difference range for controlling the louver is from preset pressure difference 2 to preset pressure difference 4. The pressure difference range for controlling the flow valve is greater than the pressure difference range for controlling the louver. In other words, preset pressure difference 1 > preset pressure difference 2 > preset pressure difference 4 > preset pressure difference 3.

[0080] When the pressure difference between two adjacent rooms is too large and greater than the preset pressure difference 1, the opening degree of the flow valve can be increased. When the pressure difference between two adjacent rooms decreases to between the preset pressure difference 1 and the preset pressure difference 2, the flow valve can suspend control and then increase the opening degree of the louver until the pressure difference is reduced to within the preset pressure difference 2. When the pressure difference between two adjacent rooms is too small and less than the preset pressure difference 3, the opening degree of the flow valve can be reduced. When the pressure difference between two adjacent rooms increases to between the preset pressure difference 3 and the preset pressure difference 4, the flow valve can suspend control and then reduce the opening degree of the louver until the pressure difference increases to above the preset pressure difference 4.

[0081] Negative pressure standards primarily range from -5Pa to -50Pa. When used on the ground, the transport isolation cabin collects pressure data from internal and external sensors to maintain a pressure differential within -50Pa, minimizing the risk of virus spread. When used onboard, the controller automatically adjusts the negative pressure to -5 to -15Pa after detecting a drop in ambient pressure through environmental sensors, partially compensating for any adverse effects on patients within the cabin caused by pressure fluctuations onboard. Figure 1 The pressure values ​​of the three rooms in the cabin increase by 15Pa from the patient admission room, the nursing clothing changing room to the buffer room, thereby realizing closed-loop control of the pressure difference values ​​of the three rooms in the cabin.

[0082] 2. The room door interlock logic control scheme is as follows:

[0083] Door 1 is the airtight door at the front of the patient admission room. Generally, it cannot be opened or closed at will to prevent the leakage of microbial pathogens. Therefore, a permission is assigned to Door 1. Door 2 is the airtight door between the patient admission room and the gowning room. When Door 2 is opened, Door 1 and Door 3 must be closed. Door 3 is the airtight door between the gowning room and the buffer zone. When Door 3 is opened, Door 2 and Door 4 must be closed. Door 4 is the airtight door at the rear of the buffer zone. When Door 4 is opened, Door 3 must be closed. Interlocking control between adjacent doors prevents the spread of microbial pathogens or contamination sources within the transfer isolation chamber.

[0084] The room door interlock logic control is independent of the automatic negative pressure compensation control and is implemented as an independent submodule using the programmable logic controller (PLC). Figure 4 As shown, from Figure 4 It can be seen that the controller needs to detect in real time whether the door opening buttons of the four doors are pressed. At the moment the door opening button of a door is pressed, the doors of the adjacent rooms must be powered on and locked in time to ensure that when one door is opened, the doors of the adjacent rooms are in a locked and closed state, eliminating the possibility of the doors of the adjacent rooms being opened at the same time.

[0085] The room door indicator light indicates the door status. The control flow chart is as follows: Figure 5 When the door is locked, it indicates that it is locked and cannot be opened, so the red light is on. When the door is not locked, it indicates that it can be opened, so the green light is on. If the room door can be opened normally, the green light indicates that the door can be opened. If the door is locked due to the adjacent room door being open, the red light indicates that the door cannot be opened.

[0086] 3. The oxygen support system status monitoring plan is as follows:

[0087] For critically ill infectious patients, an adequate oxygen supply is crucial, necessitating a negative pressure control system with oxygen supply system status monitoring capabilities. An air transport isolation cabin can contain two oxygen cylinders, each equipped with a pressure sensor to monitor the remaining oxygen within. The negative pressure control system monitors the oxygen pressure data from both oxygen cylinder pressure sensors in real time, prioritizing this data.

[0088] The oxygen support system status monitoring is also an independent submodule and is also implemented using a programmable logic controller (PLC). The oxygen support system status monitoring flow chart is as follows: Figure 6As shown in the figure, the controller first reads and determines the oxygen cylinder group pressure alarm threshold, then checks whether the pressure sensors of both oxygen cylinder groups are functioning properly. If not, an alarm is triggered to prompt the crew to conduct maintenance. Assuming the pressure sensors are functioning properly, the oxygen pressure in oxygen cylinder group 1 is first detected in real time. If the oxygen pressure in oxygen cylinder group 1 falls below the alarm threshold, an alarm is triggered to prompt the onboard medical staff to switch the oxygen supply source from oxygen cylinder group 1 to oxygen cylinder group 2. The alarm is not triggered until the oxygen source is successfully switched.

[0089] After the oxygen supply source is successfully switched, the controller begins to detect the oxygen pressure in oxygen cylinder group 2. When the oxygen pressure in oxygen cylinder group 2 falls below the alarm threshold, an alarm will be sounded indicating that the oxygen in both oxygen cylinder groups has been used up. At this time, the alarm will persist and cannot be turned off.

[0090] Although the present invention is disclosed above in terms of preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined by the claims of the present invention.

Claims

1. A control method for a transfer isolation cabin, characterized in that: The method is applied to a transport isolation cabin, which includes a patient admission room, a clothing changing room, and a buffer room. The clothing changing room is located between the patient admission room and the buffer room. The air pressure in the patient admission room is lower than the air pressure in the clothing changing room, and the air pressure in the clothing changing room is lower than the air pressure in the buffer room. The transfer isolation cabin also includes: an air blower, the air blower being used to supply air to the buffer room; An exhaust fan, the exhaust fan is used to exhaust the air in the patient treatment room, and the exhaust volume of the exhaust fan is used to adjust the overall pressure level of the transfer isolation cabin; an air supply channel, the air supply channel comprising a first air supply port facing the buffer room and a second air supply port facing the patient admission room, the air supply fan being used to supply air to the buffer room through the first air supply port, and the air supply fan being further used to supply air to the patient admission room through the second air supply port; a flow valve, the flow valve being disposed between the first air supply port and the second air supply port, and being used to control the flow of gas entering the patient admission room and the buffer room respectively; a first louver fan and a second louver fan, wherein the first louver fan is arranged between the clothing changing room and the patient admission room, and is used to control the gas flow from the clothing changing room to the patient admission room; the second louver fan is arranged between the clothing changing room and the buffer room, and is used to control the gas flow from the buffer room to the clothing changing room; The control method includes: When the overall pressure level of the transfer isolation cabin is lower than the preset pressure level, reducing the exhaust volume of the exhaust fan; When the overall pressure level of the transfer isolation cabin is greater than the preset pressure level, increasing the exhaust volume of the exhaust fan; When the pressure difference between the clothing changing room and the buffer room is greater than a first preset pressure difference, and / or when the pressure difference between the patient admission room and the clothing changing room is greater than the first preset pressure difference, increasing the opening degree of the flow valve; When the pressure difference between the clothing changing room and the buffer room is less than a second preset pressure difference, and / or when the pressure difference between the patient admission room and the clothing changing room is less than a second preset pressure difference, reducing the opening degree of the flow valve; When the pressure difference between the clothing changing room and the patient admission room is greater than a third preset pressure difference, increasing the opening degree of the first louver; When the pressure difference between the clothing changing room and the patient admission room is less than a fourth preset pressure difference, reducing the opening degree of the first louver; When the pressure difference between the clothing changing room and the buffer room is greater than a third preset pressure difference, reducing the opening degree of the second louver; When the pressure difference between the clothing changing room and the buffer room is less than a fourth preset pressure difference, reducing the opening degree of the second louver; The third preset pressure difference is different from the first preset pressure difference, the fourth preset pressure difference is different from the second preset pressure difference, and the first preset pressure difference>the second preset pressure difference>the fourth preset pressure difference>the third preset pressure difference.

2. The control method according to claim 1, characterized in that: The transfer isolation cabin also includes: a first door, the first door being arranged on a side of the patient admission room away from the clothing changing room; a second door, the second door being arranged between the nursing clothing changing room and the patient admission room; A third door, the third door being arranged between the clothing changing room and the buffer room; a fourth door, the fourth door being arranged on a side of the buffer room away from the clothing changing room; Wherein, when a target door among the first door, the second door, the third door and the fourth door is opened, the adjacent doors of the target door are in a closed state; The control method further includes: when it is detected that a door opening button of a target door is pressed, powering on and self-locking an adjacent door of the target door, where the target door is any one of the first door, the second door, the third door, and the fourth door.

3. The control method according to claim 1, wherein: The transfer isolation cabin also includes: An oxygen cylinder and an oxygen cylinder pressure sensor, wherein the oxygen cylinder is arranged in the patient treatment room, and the oxygen cylinder pressure sensor is used to detect the oxygen remaining in the oxygen cylinder; An alarm device is used to alarm when the oxygen remaining in the oxygen cylinder is lower than a preset oxygen amount; The control method further includes: when the oxygen remaining amount in the oxygen cylinder is lower than a preset oxygen amount, issuing an alarm.

4. A control system for a transport isolation cabin, characterized in that: The control system is configured to execute the control method according to any one of claims 1 to 3.

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