A life support system for a biosafety laboratory

Abstract

The application discloses a life support system of a biosafety laboratory, and relates to the technical field of life support systems, which comprises a main gas supply source, an emergency support gas source, a gas storage tank and a control center. The gas outlet end of the main gas supply source is connected with the gas inlet end of a gas supply main line, the gas outlet end of the gas supply main line is connected with the gas inlet end of the gas storage tank, the gas outlet end of the gas storage tank and the gas outlet end of the emergency support gas source are both connected with the gas inlet end of a gas supply branch line, the gas outlet end of the gas supply branch line is connected with the gas inlet end of a gas supply branch pipe, and the gas supply branch pipe is connected with a positive pressure protective clothing gas point. A pre-filter group, a cooling heat exchanger, a dryer and a post-filter group are arranged on the gas supply main line. An activated carbon filter group, a dust filter group, a sterilization filter group and a temperature and humidity control unit are sequentially arranged on the gas supply branch line. The main gas supply source, the emergency support gas source and the dryer are electrically connected with the control center. The application can effectively guarantee the safety and stability of the positive pressure protective clothing gas of the biosafety laboratory.

Description

Technical Field

[0001] This invention relates to the field of life support systems technology, and in particular to a life support system for a biosafety laboratory. Background Technology

[0002] In a P4 high-level biosafety laboratory, researchers need to wear positive pressure protective suits to enter the laboratory. The positive pressure protective suits have special gas pipeline interfaces that need to be connected to gas pipelines. The gas pipelines are responsible for supplying gas continuously throughout the entire experiment. In addition to maintaining the positive pressure of the positive pressure protective suits, the gas supplied also needs to supply the researchers with the gas required for normal breathing during the experiment.

[0003] The entire experimental process involves extremely cumbersome procedures such as changing clothes to enter and exit the lab. If the gas supply is unstable or the gas quality analysis is inaccurate, it can greatly hinder the experimenters and affect the output of scientific research results.

[0004] Traditional gas supply systems relying on ordinary compressed air pipelines and simple gas quality analysis result in dispersed control points, hindering unified control and monitoring. Frequent on-site inspections are necessary, and malfunctions in individual control components, coupled with negligence on the part of inspection personnel, can endanger laboratory personnel. Furthermore, false alarms caused by gas quality monitoring deviations can directly impact experimental progress. All of these factors increase the risk of biosafety accidents in P4 biosafety laboratories and hinder experimental progress. To ensure the safety and stability of gas supply for positive pressure protective suits during P4 biosafety laboratory experiments, reduce the risk of biosafety accidents, and improve experimental efficiency, there is an urgent need to design a life support system with global controllability that effectively guarantees the safety and stability of gas supply for positive pressure protective suits in P4 biosafety laboratories. Summary of the Invention

[0005] The purpose of this invention is to provide a life support system for biosafety laboratories to solve the problems existing in the prior art. In P4 high-level biosafety laboratories, it ensures the stability and safety of the gas supply to positive pressure protective suits in the laboratory. In the event that a serious deviation in the gas supply parameters is confirmed to cause harm to the laboratory personnel, it can promptly and effectively transmit data and alarm information. At the same time as the alarm information is confirmed and transmitted, reasonable, effective and safe and stable measures are provided to assist the laboratory personnel in evacuation. Furthermore, during the entire operation of the system, it can monitor all components and equipment of the system in real time, make reasonable and effective assessments of any point in the system in real time, and the supplied gas strictly meets the relevant laboratory safety design specifications.

[0006] To achieve the above objectives, the present invention provides the following solution:

[0007] This invention discloses a life support system for a biosafety laboratory, comprising a main gas supply source, an emergency support gas source, a gas storage tank, and a control center. The outlet of the main gas supply source is connected to the inlet of the main gas supply line. The outlet of the main gas supply line is connected to the inlet of the gas storage tank. The outlets of the gas storage tank and the emergency support gas source are both connected to the inlet of the main gas supply line. The outlet of the main gas supply line is connected to the inlet of multiple gas supply branch pipes. The outlets of the gas supply branch pipes are used to connect to several positive pressure protective clothing gas points.

[0008] The gas supply line is sequentially equipped with a pre-filter group, a cooling heat exchanger, a dryer, and a post-filter group;

[0009] The gas transmission line is sequentially equipped with an activated carbon filter group, a dust removal filter group, a sterilization filter group, and a temperature and humidity control unit;

[0010] The main gas supply source, the emergency support gas source, and the dryer are all electrically connected to the control center.

[0011] Preferably, the main air supply source includes a main air compressor and a backup air compressor. The outlet of the main air compressor is connected to the inlet of the main air supply line through a main air supply pipeline, and the outlet of the backup air compressor is connected to the inlet of the main air supply line through a backup air supply pipeline.

[0012] Both the main air supply line and the backup air supply line are equipped with an air compressor rear valve.

[0013] Both the main air compressor and the backup air compressor are electrically connected to the control center.

[0014] Preferably, the emergency support air source includes multiple compressed air cylinders, the compressed air cylinders are connected to the air inlet of the emergency support main line through an emergency support branch line, and the air outlet of the emergency support main line is connected to the air inlet of the main air supply line.

[0015] Each of the aforementioned emergency support branches is sequentially equipped with a gas cylinder pressure sensor, a gas cylinder activation valve, a gas cylinder pressure reducing valve, and a gas cylinder check valve.

[0016] The emergency support main line is equipped with an emergency support gas source maintenance valve, an emergency support main pressure sensor, an emergency support gas source outlet pressure reducing valve, an emergency support check valve, and an emergency support activation valve in sequence.

[0017] The gas cylinder pressure sensor, the gas cylinder activation valve, the emergency support main pressure sensor, and the emergency support activation valve are all electrically connected to the control center.

[0018] Preferably, the gas storage tank is equipped with a gas safety valve at the top, a gas storage tank pressure sensor, an automatic drainer connected to the bottom drain outlet of the gas storage tank, a gas storage tank drainer front valve between the gas storage tank and the automatic drainer, and a gas storage tank check valve and a gas storage tank outlet valve at the end of the gas transmission main pipe near the gas storage tank.

[0019] The gas storage tank pressure sensor and the gas storage tank outlet valve are both electrically connected to the control center.

[0020] Preferably, the filter element used in the pre-filter group has a pore size of 3μm, the filter element used in the post-filter group has a pore size of 1μm, the filter element used in the activated carbon filter group is an activated carbon filter element, the filter element used in the dust removal filter group has a pore size of 0.45μm, and the filter element used in the sterilization filter group has a pore size of 0.22μm.

[0021] The pre-filter group, the post-filter group, the activated carbon filter group, the dust removal filter group, and the sterilization filter group all include a main filter and a backup filter. The main filter is installed in the main filtration pipeline, and the backup filter is installed in the backup filtration pipeline. The main filtration pipeline and the backup filtration pipeline are connected in parallel.

[0022] The main filter pipeline is equipped with a main filter front valve and a main filter rear valve, which are respectively located on the front and rear sides of the main filter.

[0023] The backup filter pipeline is equipped with a backup filter front valve and a backup filter rear valve, which are respectively located on the front and rear sides of the backup filter.

[0024] The main filter housing is equipped with a main filter front-end pressure sensor at the top, and the backup filter housing is equipped with a backup filter front-end pressure sensor at the top.

[0025] The outlet ends of the main filter pipeline and the backup filter pipeline are equipped with filter back-end pressure sensors.

[0026] The main filter front valve, the main filter rear valve, the backup filter front valve, the backup filter rear valve, the main filter front pressure sensor, the backup filter front pressure sensor, and the filter rear pressure sensor are all electrically connected to the control center.

[0027] Preferably, the control center is a control cabinet, and the cabinet door is equipped with an HMI device, an emergency stop button, a reset button and a control cabinet lock. The control cabinet contains a switch, a PLC controller, a switching power supply, a terminal block, a fuse terminal block, an intermediate relay group, a three-hole socket and an air switch.

[0028] The fuse terminal block is electrically connected to the PLC controller, the PLC controller is electrically connected to the intermediate relay group, and the switch can be electrically connected to the PLC controller, the HMI device, the SMS alarm and the P4 laboratory central control room host computer respectively;

[0029] Both the emergency stop button and the reset button are electrically connected to the PLC controller.

[0030] The top of the control cabinet is equipped with an audible and visual alarm, which is electrically connected to the PLC controller.

[0031] Preferably, the control center is equipped with a first gas concentration monitoring instrument group and a second gas concentration monitoring instrument group, and the main gas supply source is equipped with an environmental gas quality monitoring unit.

[0032] The gas supply line is equipped with a main gas source gas quality monitoring point, and the gas transmission line is equipped with a gas storage tank outlet gas quality monitoring point. The main gas source gas quality monitoring point is connected to the first gas concentration monitoring instrument group through a first gas concentration monitoring pipeline, and the gas storage tank outlet gas quality monitoring point is connected to the second gas concentration monitoring instrument group through a second gas concentration monitoring pipeline.

[0033] The first gas concentration monitoring instrument group, the second gas concentration monitoring instrument group and the environmental gas quality monitoring unit all include a gas concentration monitoring tube, and the gas concentration monitoring tube is equipped with an oxygen concentration detector, a carbon monoxide concentration detector and a carbon dioxide concentration detector.

[0034] The gas concentration monitoring tubes in the first gas concentration monitoring instrument group and the second gas concentration monitoring instrument group are also equipped with gas concentration monitoring pressure reducing valves, and the gas concentration monitoring tubes in the environmental gas quality monitoring unit are also equipped with air sampling pumps.

[0035] Preferably, the temperature and humidity control unit includes a temperature control device and a humidity control device;

[0036] The temperature control device includes a pipe heating jacket, a branch pipe temperature sensor, and a flow sensor. The pipe heating jacket is disposed on the outside of the gas transmission branch pipe, and the branch pipe temperature sensor and the flow sensor are disposed on the gas transmission branch pipe.

[0037] The humidity control device includes a humidification tank, a pure steam inlet pipe at the upper end of the humidification tank, a pure steam inlet valve on the pure steam inlet pipe, and the upper and lower ends of the humidification tank connected to two interfaces of a differential pressure level gauge, respectively. A humidification outlet pipe of the humidification tank is equipped with a humidification outlet valve and a humidity sensor. A humidification inlet pipe of the humidification tank is equipped with a humidification inlet valve. A purified water inlet pipe of the humidification tank is equipped with a purified water replenishment valve. The outlet end of the humidification inlet pipe is connected to an aeration coil, which has multiple aeration holes. An electric heating element and a water temperature sensor are located in the lower part of the humidification tank. A humidification drain pipe is located at the lower end of the humidification tank, and a humidification drain valve and a humidification steam trap are located on the humidification drain pipe.

[0038] Preferably, the main gas supply line is equipped with a main gas source pressure sensor, a main gas source check valve, and a main gas supply activation valve. A detection pipeline is connected between the main gas source check valve and the main gas supply activation valve. The end of the detection pipeline away from the main gas supply line is connected to a first detection branch and a second detection branch. The first detection branch is equipped with a discharge valve, and the second detection branch is equipped with a purification valve, a carbon monoxide catalyst, and a carbon dioxide adsorber. The end of the second detection branch away from the detection pipeline is connected to the gas inlet of the gas storage tank.

[0039] Preferably, the gas transmission line is also equipped with a gas storage tank check valve, a gas storage tank outlet valve, a gas transmission pipe pressure reducing valve, and a gas transmission pipe pressure sensor;

[0040] The gas transmission branch pipe is also equipped with a branch pipe maintenance ball valve, a branch pipe pressure sensor, and a branch pipe check valve.

[0041] The present invention achieves the following technical effects compared to the prior art:

[0042] This invention provides a life support system for a biosafety laboratory. All control and monitoring points within the entire biosafety laboratory life support system are centrally monitored by a single control hub. The real-time status of dispersed control points is intuitively displayed on a single HMI device. All data and images on the screen can be directly connected to the host computer in the P4 laboratory control room via communication, ensuring the real-time effectiveness of the entire process monitoring. The main gas supply is designed with a main air compressor and a backup air compressor to ensure the stability of the main gas supply. The system is also equipped with a UPS (Uninterruptible Power Supply) to ensure emergency handling capabilities in the event of a mains power outage. Simultaneously, the system includes main gas source gas quality monitoring points, gas storage tank outlet gas quality monitoring points, and an ambient gas quality monitoring unit to monitor gas quality, minimizing false alarms caused by potential sensor deviations. Multiple gas filtration units are also designed and equipped to remove impurities and harmful substances from the gas, ensuring the safety of the system's gas supply. The system promptly issues alarms upon confirming abnormal parameters, triggering a linkage alarm in the central control room of the P4 high-level biosafety laboratory. An SMS alarm module sends alarms to the mobile phones of all laboratory management and maintenance personnel, maximizing the effective transmission of alarm information. Simultaneously, an emergency backup gas source is deployed to replace the main gas supply and assist in the evacuation of laboratory personnel. Temperature and humidity control devices are also included to ensure the comfort of laboratory personnel using the gas. Gas storage tanks are designed for gas buffering to ensure the stability of the gas supply, and detection probes and control valves monitor the entire gas supply pipeline system.

[0043] Furthermore, the main air supply consists of two air compressor units designed to meet the laboratory's air consumption. The system status and start / stop control signals of each compressor unit are connected to the control center. During operation, the two compressor units alternate as backups for each other. When an alarm signal is detected in an air compressor unit, the backup compressor unit can be switched to supply air in a timely manner. Each air compressor unit is equipped with a post-compressor valve, allowing for direct shutdown for timely maintenance. By monitoring the operating status signals of the air compressor units, their start / stop relationships can be rationally allocated in real time. This ensures both efficient and energy-saving operation of the air compressor units and a stable supply of the main air source.

[0044] Furthermore, the emergency support air source consists of a group of compressed air cylinders that meet national standards. The system can determine the remaining capacity of each compressed air cylinder based on the real-time pressure values ​​detected by the cylinder pressure sensors on the emergency support branch lines. The real-time status of each compressed air cylinder is displayed intuitively on the HMI device, and an alarm is issued to remind maintenance personnel to replace compressed air cylinders with pressures below a certain value. Each emergency support branch line uses a cylinder pressure reducing valve for primary pressure reduction of the compressed air, preventing excessive pressure in the main emergency support air source line and thus avoiding safety hazards. After the emergency support air source is put into use, the system continuously monitors the pressure of the main emergency support air source line, the main supply line, and the main transmission line. Based on the pressure comparison, the system adjusts the number of compressed air cylinders in use in real time through the cylinder activation valve, ensuring sufficient air supply while avoiding unnecessary pressure loss from cylinder activation, reducing the frequency of compressed air cylinder replacement, and saving manpower and financial costs. At the same time, one-way valves are installed on both the main emergency support line and the emergency support branch lines to prevent air source backflow. The number of compressed air cylinders is matched to the laboratory size and usage to meet the standard gas supply time. At the same time, while meeting the minimum evacuation time, an additional number can be reserved as emergency backup. The specific number can be adjusted according to management. Increasing or decreasing the number will not affect the structure of the invention.

[0045] Furthermore, the gas storage tank needs to be designed to match the actual gas consumption. The main gas supply source is directly connected to the storage tank to buffer and balance the gas pressure to ensure the stability of the gas supply pressure. The automatic drain at the bottom is used to discharge the residual condensed water in the gas after humidity control. A gas safety valve is installed on the top of the tank to ensure gas safety and avoid safety accidents.

[0046] Furthermore, the UPS (Uninterruptible Power Supply) serves as an emergency backup power source for the control center, responsible for supplying power to the control center, SMS alarm module, various detection probes, and various control valves. In the event of a power outage in the life support system, it can maintain the system's control over the emergency support gas source and maintain the supply of gas for the emergency evacuation of laboratory personnel. The specific capacity of the UPS (Uninterruptible Power Supply) can be matched according to the size of the laboratory and its usage. Changes in capacity do not affect the system structure of this invention.

[0047] Furthermore, the SMS alarm module connects directly to the switch, enabling it to directly read real-time values ​​of key system data and alarms. It can then send the read information, including real-time values ​​and alarms, to designated personnel's mobile phones according to pre-defined requirements. This ensures the system delivers data and alarm information in a timely and effective manner.

[0048] Furthermore, the ambient gas quality monitoring unit is installed in the working environment of the main gas supply source. It consists of a gas sampling pump, an oxygen concentration detector, a carbon monoxide concentration detector, and a carbon dioxide concentration detector, and monitors the gas quality of the working environment of the air compressor in real time.

[0049] Furthermore, this invention removes oil and most of the water through a pre-filter group, then cools the gas to about 25°C through a cooling heat exchanger to remove some moisture again, and then the gas enters the dryer for further drying. The dew point temperature of the dryer can be set freely and adjusted in real time according to the water accumulation in the downstream gas storage tank and the feedback from the downstream experimental personnel, thereby achieving the effect of drying the gas.

[0050] Furthermore, this invention includes five filter groups with different filtration levels and types, ensuring the removal of impurities and odors from the air while significantly reducing filter clogging due to the graded filtration levels. Each filter group is equipped with a backup filter, as well as pre- and post-press pressure sensors and electric valves, allowing for timely switching in case of filter clogging, ensuring the stability of the laboratory gas supply. The switched filter system will also prompt maintenance personnel to replace the filter cartridge, ensuring that the two filter groups serve as backups for each other and that a qualified filter is always available for use.

[0051] Furthermore, the temperature control device consists of a pipe heating jacket, which is installed on the gas supply branch pipe. A flow sensor is installed at its front end, and a branch pipe temperature sensor is installed at its rear end. When gas flow is detected in the pipe, the system controls the start and stop of the pipe heating jacket based on the temperature value detected by the branch pipe temperature sensor. Because the preceding dryer has already reduced the gas temperature to approximately 25°C, and all pipes, including the gas storage tank, are not insulated, the gas temperature is close to room temperature under normal operating conditions. Heating may only be required in special circumstances such as winter. The flow sensor can also record flow usage for review and timely adjustment of the gas supply pressure in the gas supply branch pipe.

[0052] The humidity control device aerates the gas through temperature-controlled purified water. The level and temperature of the purified water can be adjusted in real time according to the humidification situation to ensure that the humidity reaches the required standard while the temperature of the humidified gas is stable. At the same time, in order to prevent bacterial growth caused by long-term storage of warm water, a complete pure steam sterilization solution is provided. Attached Figure Description

[0053] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0054] Figure 1 This is a schematic diagram of the life support system in the biosafety laboratory of Example 1;

[0055] Figure 2 This is a schematic diagram of the emergency support gas source in the life support system of the biosafety laboratory in Example 1.

[0056] Figure 3 This is an external schematic diagram of the control center in the life support system of the biosafety laboratory in Example 1.

[0057] Figure 4 This is a schematic diagram of the internal control center of the life support system in the biosafety laboratory of Example 1;

[0058] Figure 5 This is a schematic diagram of the internal connections of the control center in the life support system of the biosafety laboratory in Example 1.

[0059] Figure 6 This is a schematic diagram of the analog input wiring in the life support system of a biosafety laboratory, as shown in Example 1.

[0060] Figure 7 This is a schematic diagram of the digital input wiring in the life support system of a biosafety laboratory, as shown in Example 1.

[0061] Figure 8 This is a schematic diagram of the digital output wiring in the life support system of a biosafety laboratory, as shown in Example 1.

[0062] Figure 9 This is a schematic diagram of the internal structure of each filter group in the life support system of the biosafety laboratory in Example 1;

[0063] Figure 10 This is a schematic diagram of the internal structure of the environmental gas quality monitoring unit in the life support system of the biosafety laboratory in Example 1.

[0064] Figure 11 This is a schematic diagram of the internal structure of the air humidification unit in the life support system of the biosafety laboratory in Example 1;

[0065] Figure 12 This is a schematic diagram of the aeration coil in the life support system of the biosafety laboratory in Example 1.

[0066] In the diagram: 01. Air compressor rear valve; 02. Main gas supply check valve; 03. Main gas supply activation valve; 04. Purification valve; 05. Discharge valve; 06. Gas storage tank drain valve front valve; 07. Automatic drain; 08. Gas storage tank check valve; 09. Gas storage tank outlet valve; 10. Gas pipeline pressure reducing valve; 11. Branch pipe maintenance ball valve; 12. Branch pipe check valve; 13. Emergency support check valve; 14. Emergency support activation valve; 15. Heat exchanger steam trap; 16. Emergency support gas source outlet pressure reducing valve; 17. Emergency support gas source maintenance valve; 18. Gas cylinder check valve; 19. Gas cylinder pressure reducing valve; 20. Gas cylinder activation valve; 21. Gas safety valve.

[0067] 44. Main gas source pressure sensor; 45. Main gas source gas quality monitoring point; 46. Gas storage tank pressure sensor; 47. Gas storage tank outlet gas quality monitoring point; 48. Gas transmission pipe pressure sensor; 49. Branch pipe pressure sensor; 50. Branch pipe temperature sensor; 51. Gas cylinder pressure sensor; 52. Emergency support main pipe pressure sensor;

[0068] 110. Main air compressor; 111. Backup air compressor; 112. Cooling heat exchanger; 113. Dryer; 114. Gas storage tank; 115. Flow sensor; 116. Pipeline heating jacket; 117. Ambient gas quality monitoring unit; 118. Main gas source; 119. Emergency support gas source; 120. Uninterruptible power supply; 121. Control center; 122. SMS alarm; 123. P4 laboratory central control room host computer; 124. Humidity control device;

[0069] 145. Gas concentration monitoring and pressure reducing valve; 146. Oxygen concentration detector; 147. Carbon monoxide concentration detector; 148. Carbon dioxide concentration detector; 149. Switch; 150. PLC controller; 151. Switching power supply; 152. Terminal block; 153. Fuse terminal block; 154. Intermediate relay group; 155. Three-hole socket; 156. Air switch; 157. HMI device; 158. Emergency stop button; 159. Reset button; 160. Control cabinet lock; 161. Audible and visual alarm; 162. Air sampling pump;

[0070] 170. Pressure sensor at the front end of the main filter; 171. Valve at the front end of the main filter; 172. Valve at the front end of the standby filter; 173. Pressure sensor at the front end of the standby filter; 174. Valve at the rear end of the main filter; 175. Valve at the rear end of the standby filter; 176. Pressure sensor at the rear end of the filter;

[0071] 222. Pre-filter assembly; 223. Post-filter assembly; 224. Activated carbon filter assembly; 225. Dust removal filter assembly; 226. Sterilization filter assembly; 227. Carbon monoxide catalyst; 228. Carbon dioxide adsorber;

[0072] 311. Pure steam inlet valve; 312. Differential pressure level gauge; 313. Humidifier outlet valve; 314. Humidifier tank; 315. Aeration coil; 316. Electric heating element; 317. Water temperature sensor; 318. Humidifier drain valve; 319. Humidifier steam trap; 320. Purified water replenishment valve; 321. Humidifier inlet valve; 322. Humidity sensor. Detailed Implementation

[0073] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0074] The purpose of this invention is to provide a life support system for biosafety laboratories to solve the problems existing in the prior art. In P4 high-level biosafety laboratories, it ensures the stability and safety of the gas supply to positive pressure protective suits in the laboratory. In the event that a serious deviation in the gas supply parameters is confirmed to cause harm to the laboratory personnel, it can promptly and effectively transmit data and alarm information. At the same time as the alarm information is confirmed and transmitted, reasonable, effective and safe and stable measures are provided to assist the laboratory personnel in evacuation. Furthermore, during the entire operation of the system, it can monitor all components and equipment of the system in real time, make reasonable and effective assessments of any point in the system in real time, and the supplied gas strictly meets the relevant laboratory safety design specifications.

[0075] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0076] Example 1

[0077] like Figures 1-12 As shown, this invention discloses a life support system for a biosafety laboratory, including a main gas supply source 118, an emergency support gas source 119, a gas storage tank 114, and a control center 121. The outlet of the main gas supply source 118 is connected to the inlet of the main gas supply line, and the outlet of the main gas supply line is connected to the inlet of the gas storage tank 114. The gas output from the main gas supply source 118 is transported to the gas storage tank 114 through the main gas supply line, and the gas storage tank 114 acts as a buffer for gas pressure. The outlets of the gas storage tank 114 and the emergency support gas source 119 are both connected to the inlet of the main gas supply line. The outlet of the main gas supply line is connected to the inlet of multiple parallel gas supply branch pipes, and the outlets of the gas supply branch pipes are used to connect several parallel positive pressure protective clothing gas points.

[0078] The gas supply line is sequentially equipped with a pre-filter group 222, a cooling heat exchanger 112, a dryer 113, and a post-filter group 223. The pre-filter group 222 is used to remove oil and most of the moisture from the air. The cooling heat exchanger 112 is used to reduce the temperature of the compressed gas and remove moisture from the gas again through its own heat exchanger condensate drain 15. The dryer 113 is used for humidity control of the gas. The post-filter group 223 is used to remove impurities from the dried gas, thereby performing functions such as compression, filtration, cooling, and dehumidification of ambient air.

[0079] The gas transmission line is sequentially equipped with an activated carbon filter group 224, a dust removal filter group 225, a sterilization filter group 226, and a temperature and humidity control unit. The activated carbon filter group 224 is used for gas deodorization, the dust removal filter group 225 is used to remove small particulate dust from the gas, and the sterilization filter group 226 is used for gas sterilization. This is to deodorize, remove dust, and sterilize the gas output from the gas storage tank 114, and to perform necessary temperature and humidity control, so as to supply the appropriate gas to the corresponding area of ​​the laboratory.

[0080] The main gas supply 118, emergency support gas supply 119 and dryer 113 are all electrically connected to the control center 121, and the control center 121 controls the operation of each device.

[0081] In actual use, ambient air, powered by the main gas supply 118, is compressed, filtered, cooled, and dehumidified before being connected to the gas storage tank 114 for pressure buffering. The gas supplied by the gas storage tank 114 is then supplied to the corresponding areas of the laboratory after being deodorized, dust-removed, sterilized, filtered, and subjected to temperature and humidity control. In special circumstances, the emergency support gas source 119 can be activated to supply gas to the main pipeline.

[0082] In this embodiment, as Figure 1 As shown, the main air supply source 118 includes a main air compressor 110 and a backup air compressor 111. The outlet of the main air compressor 110 is connected to the inlet of the main air supply line through the main air supply pipeline. Similarly, the outlet of the backup air compressor 111 is connected to the inlet of the main air supply line through a backup air supply pipeline. In actual use, the main air compressor 110 and the backup air compressor 111 are actually mutual backup air compressors. When one fails, the other is replaced in time to avoid affecting the normal operation of the system.

[0083] Furthermore, both the main air supply line and the backup air supply line are equipped with an air compressor post valve 01, which serves as a shut-off valve when the main air compressor 110 and the backup air compressor 111 are under maintenance. When the main air compressor 110 or the backup air compressor 111 malfunctions, the connection between it and the downstream air supply line can be cut off through the air compressor post valve 01.

[0084] In addition, the main air compressor 110 and the backup air compressor 111 are both electrically connected to the control center 121, and the control center 121 controls the start and stop of each component.

[0085] In this embodiment, as Figure 2 As shown, the emergency support air source 119 includes multiple compressed air cylinders that meet national standards. The cylinder openings are connected to the inlet of the main emergency support line via emergency support branch lines. Each emergency support branch line is connected in parallel with the others. The outlet of the main emergency support line is connected to the inlet of the main gas supply line, thereby delivering the gas from the compressed air cylinders to the main gas supply line.

[0086] Each emergency support branch is equipped with a gas cylinder pressure sensor 51, a gas cylinder activation valve 20, a gas cylinder pressure reducing valve 19, and a gas cylinder check valve 18 in sequence. The gas cylinder pressure sensor 51 is used to monitor the gas pressure on the emergency support branch, the gas cylinder activation valve 20 is used to control the opening and closing of the emergency support branch, the gas cylinder pressure reducing valve 19 is used to reduce the monitored gas pressure on the emergency support branch, and the gas cylinder check valve 18 is used to prevent gas backflow on the emergency support branch.

[0087] The emergency support main line is equipped with, in sequence, an emergency support air source maintenance valve 17, an emergency support main pressure sensor 52, an emergency support air source outlet pressure reducing valve 16, an emergency support check valve 13, and an emergency support activation valve 14. The emergency support air source maintenance valve 17 is a valve that is closed when the operator is maintaining the compressed air cylinder. The emergency support main pressure sensor 52 is used to monitor the pressure on the emergency support main line. The emergency support air source outlet pressure reducing valve 16 is used to reduce the pressure of the gas on the emergency support main line. The emergency support check valve 13 is used to prevent the gas from flowing back on the emergency support main line. The emergency support activation valve 14 is used to control the gas flow on the emergency support main line.

[0088] The gas cylinder pressure sensor 51, the gas cylinder activation valve 20, the emergency support main pressure sensor 52, and the emergency support activation valve 14 are all electrically connected to the control center 121. The real-time values ​​fed back by the gas cylinder pressure sensor 51 and the emergency support main pressure sensor 52 are both connected to the control center 121, and the gas cylinder activation valve 20 and the emergency support activation valve 14 are both controlled uniformly by the control center 121.

[0089] When the system switches to emergency support air source 119, it continuously monitors the pressure sensors 51 of all connected compressed air cylinders. It first connects to a compressed air cylinder with a pressure within the acceptable range, and then continuously monitors the pressure of the emergency support main pressure sensor 52. If the pressure remains higher than the pressure of the main supply line pressure sensor 48, it maintains the supply of one compressed air cylinder. During this period, if the pressure of the supplied cylinder drops to the unacceptable level, it automatically switches to the next compressed air cylinder with acceptable pressure, continuing this logic until the personnel have evacuated. If the pressure of the emergency support main pressure sensor 52 is equal to the pressure of the main supply line pressure sensor 48 when only one compressed air cylinder is supplied, it is determined that the air supply is insufficient. In this case, the system will automatically adjust and connect two or more compressed air cylinders until the pressure of the emergency support main pressure sensor 52 remains higher than the pressure of the main supply line pressure sensor 48, and maintain the adjusted state while continuously switching between supplied compressed air cylinders whose pressure has dropped to the unacceptable level, continuing this logic until the personnel have evacuated.

[0090] In this embodiment, as Figure 1 As shown, a gas safety valve 21 is installed on the top of the gas storage tank 114 to ensure its safety. A gas pressure sensor 46 is also installed on the gas storage tank 114 to monitor the internal gas pressure. An automatic drain valve 07 is connected to the bottom drain outlet of the gas storage tank 114. The automatic drain valve 07 is a common device in existing gas storage tanks 114, and its function is to automatically drain the water located at the bottom of the gas storage tank 114. A gas tank drain valve front valve 06 is installed between the gas storage tank 114 and the automatic drain valve 07 to control the flow between the automatic drain valve 07 and the bottom of the gas storage tank 114. A gas tank check valve 08 and a gas tank outlet valve 09 are installed at the end of the main gas pipeline near the gas storage tank 114. The gas tank check valve 08 prevents gas backflow, and the gas tank outlet valve 09 controls the flow of gas discharged from the gas storage tank 114.

[0091] Both the gas storage tank pressure sensor 46 and the gas storage tank outlet valve 09 are electrically connected to the control center 121, and the real-time value fed back by the gas storage tank pressure sensor 46 is connected to the control center 121. The gas storage tank outlet valve 09 is uniformly controlled by the control center 121.

[0092] In this embodiment, as Figure 1As shown, the filter element used in the pre-filter assembly 222 has a pore size of 3μm, the filter element used in the post-filter assembly 223 has a pore size of 1μm, the filter element used in the activated carbon filter assembly 224 is an activated carbon filter element, the filter element used in the dust removal filter assembly 225 has a pore size of 0.45μm, and the filter element used in the sterilization filter assembly 226 has a pore size of 0.22μm.

[0093] In addition, such as Figure 9 As shown, the pre-filter group 222, post-filter group 223, activated carbon filter group 224, dust removal filter group 225, and sterilization filter group 226 all include a main filter and a backup filter. The main filter is installed in the main filter pipeline, and the backup filter is installed in the backup filter pipeline. The main filter pipeline and the backup filter pipeline are connected in parallel. When one of the filters becomes clogged, the system will automatically switch to the other filter and issue an alarm to remind maintenance personnel to replace the filter element of the clogged filter.

[0094] The main filter pipeline is equipped with a front valve 171 and a rear valve 174. The front valve 171 and the rear valve 174 are respectively located on the front and rear sides of the main filter to control whether the main filter is put into use, thereby realizing filter switching and filter element replacement.

[0095] Similarly, the backup filter pipeline is equipped with a backup filter front valve 172 and a backup filter rear valve 175. The backup filter front valve 172 and the backup filter rear valve 175 are respectively located on the front and rear sides of the backup filter to control whether the backup filter is put into use, thereby realizing filter switching and filter element replacement.

[0096] The main filter housing has a pressure sensor 170 at its front end to monitor the air pressure inside the main filter. Similarly, the standby filter housing has a pressure sensor 173 at its front end to monitor the air pressure inside the standby filter.

[0097] The outlet end of the main filter line and the backup filter line is equipped with a filter back-end pressure sensor 176 to monitor the air pressure at the back end of the main filter and the backup filter.

[0098] In addition, the main filter front valve 171, the main filter rear valve 174, the backup filter front valve 172, the backup filter rear valve 175, the main filter front pressure sensor 170, the backup filter front pressure sensor 173, and the filter rear pressure sensor 176 are all electrically connected to the control center 121, and the operation of each component is uniformly controlled by the control center 121.

[0099] The pressure sensor 170 at the front end of the main filter and the pressure sensor 173 at the front end of the backup filter serve as the front-end detection for the main filter and the backup filter, respectively. The pressure sensor 176 at the rear end of the filter is used to detect the pressure at the rear end of the main filter or the backup filter. The pressure difference before and after the filter is used to determine the clogging status of the filter, whether the filter needs to be switched, and to remind the user to replace the filter element. If the pressure difference detected by the pressure sensor 170 at the front end of the main filter and the pressure sensor 176 at the rear end of the filter exceeds the specified value, the system will open the valve 172 at the front end of the backup filter and the valve 175 at the rear end of the backup filter, and then close the valve 171 at the front end of the main filter and the valve 174 at the rear end of the main filter. After the switch is completed, an alarm will be issued and the filter element group at the corresponding position on the HMI device 157 (i.e., the touch screen) in the control center 121 will be marked in red to remind maintenance personnel to replace the clogged filter element. A replacement completion button will pop up next to the corresponding filter element group. After the operator has completed the replacement, he / she needs to click the replacement completion button at the corresponding position on the HMI device 157 (i.e., the touch screen) to reset. When the replacement completion button is pressed, the system will briefly switch to the replaced filter element group to judge the pressure difference before and after. Only after the judgment is qualified can the alarm be cleared and the system switch back to another filter element group to restore normal operation. Otherwise, the alarm cannot be confirmed until the filter element replacement meets the standard to ensure that the filter element replacement process is qualified for the next switch.

[0100] In this embodiment, as Figures 3-5 As shown, the control center 121 is a common existing control cabinet, which is electrically connected to the UPS (Uninterruptible Power Supply 120) to provide it with power. The cabinet door is equipped with an HMI device 157 (touchscreen) for human-machine interaction, an emergency stop button 158, a reset button 159, and a control cabinet lock 160. Inside the control cabinet are a communication switch 149, a PLC controller 150 (Programmable Logic Controller), a power supply 151, a terminal block 152 for circuit wiring, a fuse terminal block 153 for protection circuits, an intermediate relay group 154 ​​for control, a three-prong socket 155 for maintenance, and an air switch 156 for circuit power protection. The specific connection relationships of each electrical component are as follows:

[0101] All signal lines from sensors and gas concentration detectors are electrically connected to the PLC controller 150 via fuse terminal block 153. The PLC controller 150 is electrically connected to the intermediate relay group 154. The switch 149 can be electrically connected (specifically via network cable) to the PLC controller 150, HMI device 157, SMS alarm 122, and the host computer 123 in the P4 laboratory control room. Emergency stop button 158 and reset button 159 are both electrically connected to the PLC controller 150. An audible and visual alarm 161 is located on the top of the control cabinet and is electrically connected to the PLC controller 150.

[0102] More specifically, the power cord from the UPS (Uninterruptible Power Supply 120) is connected to the input terminal of the air switch 156. The output terminal of the air switch 156 is connected to the input terminal of the switching power supply 151 and the three-hole socket 155. The output terminal of the switching power supply 151 is connected to the terminal block 152. The PLC controller 150 and HMI device 157 are connected through the terminal block 152 and powered by the switching power supply 151. The switch 149 is connected to the power supply at the terminal block 152. The signal lines of all sensors and gas concentration detectors are connected to the PLC controller 150 after being connected to the fuse terminal block 153. The signal lines of the control valves of the PLC controller 150 are connected to the intermediate relay group 154 ​​as the coil power supply of the intermediate relays. One end of the power lines of all controlled valves is connected to the terminal block 152 and the other end is connected to the intermediate relay group 154. The switch 149 is used to connect the PLC controller 150, HMI device 157, SMS alarm 122 and the host computer 123 in the P4 laboratory control room for data communication. The reset button 159 resets the system alarm after processing. The emergency stop button 158 stops the system in case of uncontrollable factors. The control cabinet lock 160 serves as the physical safety guarantee for the control center 121, ensuring the safety of electrical components inside the control cabinet. The audible and visual alarm 161 can directly alert on-site maintenance personnel with sound and light when the system has an alarm.

[0103] In addition, the PLC controller 150, as the monitoring core, is responsible for controlling each air compressor and valve, reading real-time values ​​from sensors, inputting the status of each air compressor and dryer 113, and connecting control buttons. It is connected to the touchscreen (HMI device 157), SMS alarm 122, and the P4 laboratory control room host computer 123 via the switch 149. The touchscreen (HMI device 157), as the human-machine interface, is responsible for viewing and editing system data and has direct data interaction with the PLC controller 150. The P4 laboratory control room host computer 123 and SMS alarm 122 only read data and alarm information and do not have control functions.

[0104] In addition, such as Figures 6-8 As shown, this embodiment provides a module wiring diagram for a life support system, divided into two analog input wirings, a digital input wiring, and a digital output wiring. The analog input wiring is mainly connected to pressure and gas concentration detectors and temperature sensors. The digital input wiring is mainly connected to alarm reset, system emergency stop, system component operating status, and alarm status. The digital output wiring is mainly connected to valves, equipment start, alarms, and audible and visual alarms. Each analog input wiring has a fuse to prevent damage to the module from system wiring errors and power failures, and the signal line shielding must be grounded.

[0105] In this embodiment, as Figure 1 , Figure 4 and Figure 10 As shown, the control center 121 (i.e., the control cabinet) is equipped with a first gas concentration monitoring instrument group and a second gas concentration monitoring instrument group, and an environmental gas quality monitoring unit 117 is installed at the main gas supply source 118.

[0106] A main gas source gas quality monitoring point 45 is installed on the main gas supply line, which is one location on the main gas supply line. A gas storage tank outlet gas quality monitoring point 47 is installed on the main gas transmission line, which is another location on the main gas transmission line. The main gas source gas quality monitoring point 45 is connected to a first gas concentration monitoring instrument group via a first gas concentration monitoring pipeline, thereby delivering gas from the main gas supply line to the first gas concentration monitoring instrument group. The gas storage tank outlet gas quality monitoring point 47 is connected to a second gas concentration monitoring instrument group via a second gas concentration monitoring pipeline, thereby delivering gas from the main gas transmission line to the second gas concentration monitoring instrument group.

[0107] The first gas concentration monitoring instrument group, the second gas concentration monitoring instrument group, and the environmental gas quality monitoring unit 117 all have the same part, that is, all three include a gas concentration monitoring tube, and the gas concentration monitoring tube is equipped with an oxygen concentration detector 146, a carbon monoxide concentration detector 147, and a carbon dioxide concentration detector 148. The oxygen concentration detector 146, carbon monoxide concentration detector 147, and carbon dioxide concentration detector 148 are also connected to a power supply via a terminal block 152.

[0108] The difference between the three is that the gas concentration monitoring tubes in the first gas concentration monitoring unit and the second gas concentration monitoring unit are also equipped with gas concentration monitoring pressure reducing valves 145, while the gas concentration monitoring tubes in the environmental gas quality monitoring unit 117 are also equipped with air sampling pumps 162. The power supply of air sampling pumps 162 is connected to the output terminal of air switch 156 through intermediate relay group 154. The start and stop of air sampling pumps 162 are uniformly controlled by control center 121.

[0109] The main gas source gas quality monitoring point 45 and the gas storage tank outlet gas quality monitoring point 47 are directly connected to the control center 121 through the first gas concentration monitoring pipeline and the second gas concentration monitoring pipeline, respectively. After being depressurized by the gas concentration monitoring pressure reducing valve 145, the gas is then discharged directly after the corresponding parameter concentrations are detected by the oxygen concentration detector 146, carbon monoxide concentration detector 147, and carbon dioxide concentration detector 148. The measured parameters are the standard for judging the quality of the main gas supply 118. When the concentration parameter exceeds the specified index, the system will issue an on-site alarm through the audible and visual alarm 161 and display it on the HMI device 157 (touch screen). All alarms will be simultaneously sent to the laboratory control room and the relevant management and maintenance personnel will be notified via SMS alarm 122. Only when the emergency support gas source 119 needs to be activated will the experiment need to be interrupted and the experimental personnel notified to evacuate.

[0110] For environmental gas quality monitoring unit 117, such as Figure 10 As shown, during operation, the air sampling pump 162 continuously pumps ambient air into the oxygen concentration detector 146, carbon monoxide concentration detector 147 and carbon dioxide concentration detector 148 at a set flow rate for gas quality detection, and then discharges the gas. The detected data is transmitted to the control center 121.

[0111] In this embodiment, the temperature and humidity control unit includes a temperature control device and a humidity control device 124, wherein the temperature control device is used to control the gas temperature, and the humidity control device 124 is used to control the gas humidity.

[0112] The temperature control device includes a pipe heating jacket 116, a branch pipe temperature sensor 50, and a flow sensor 115. The pipe heating jacket 116 can be an existing electric heat tracing device and is located on the outside of the gas branch pipe to heat the gas inside. The branch pipe temperature sensor 50 and the flow sensor 115 are located on the gas branch pipe and are both electrically connected to the control center 121, which controls them uniformly. When the flow sensor 115 detects flow, the system determines whether to activate the pipe heating jacket 116 based on the temperature feedback from the branch pipe temperature sensor 50 and adjusts the heating power accordingly.

[0113] The specific structure of the humidity control device 124 is as follows: Figures 11-12As shown, the humidity control device 124 includes a humidification tank 314, which is the main structural component of the humidity control device 124. A pure steam inlet pipe is provided at the upper end of the humidification tank 314, which can supply pure steam into the humidification tank 314. A pure steam inlet valve 311 is provided on the pure steam inlet pipe to control the flow of pure steam. The upper and lower ends of the humidification tank 314 are respectively connected to two interfaces of a differential pressure level gauge 312, thereby measuring the liquid level height inside the humidification tank 314. A humidification outlet pipe is provided at the upper end of the humidification tank 314. The end of the humidification outlet pipe away from the humidification tank 314 is connected to the gas outlet of the positive pressure protective suit. A humidification outlet valve 313 and a humidity sensor 322 are provided on the humidification outlet pipe of the humidification tank 314. The humidification outlet valve 313 is used to control the flow of the humidification outlet pipe, and the humidity sensor 322 is used to detect the humidity of the gas. The humidifying tank 314 is also equipped with a humidifying air inlet pipe on its side wall. The end of the humidifying air inlet pipe away from the humidifying tank 314 is used to connect to the delivery branch pipe. A humidifying air inlet valve 321 is installed on the humidifying air inlet pipe of the humidifying tank 314 to control the flow of gas in the humidifying air inlet pipe. A purified water inlet pipe is also installed on the side wall of the humidifying tank 314. The end of the purified water inlet pipe away from the humidifying tank 314 is used to connect to a purified water source. A purified water replenishment valve 320 is installed on the purified water inlet pipe of the humidifying tank 314 to control the flow of purified water in the pipe. The air outlet end of the humidifying air inlet pipe (i.e., the end of the humidifying air inlet pipe located inside the humidifying tank 314) is connected to a spiral aeration coil 315, and the aeration coil 315 is provided with multiple aeration holes to achieve uniform gas distribution. The lower part of the humidification tank 314 is equipped with an electric heating element 316 and a water temperature sensor 317. The electric heating element 316 is used to heat the purified water in the humidification tank 314 to maintain the purified water within a suitable temperature range, while the water temperature sensor 317 is used to monitor the water temperature in the humidification tank 314. The lower end of the humidification tank 314 is equipped with a humidification drain pipe, which is equipped with a humidification drain valve 318 and a humidification steam trap 319. The humidification drain valve 318 is used to control the flow in the humidification drain pipe, while the humidification steam trap 319 is used to discharge condensate in the humidification tank 314 during the pure steam sterilization process of the humidity control device 124.

[0114] During operation, gas enters the humidification tank 314 through the humidification inlet valve 321, and the gas source is introduced into the purified water through the aeration coil 315 to humidify the gas source. The purified water level is controlled by the purified water replenishment valve 320, the humidification drain valve 318, the differential pressure level gauge 312, and the humidity sensor 322 to regulate the gas humidity. To prevent the gas temperature from dropping due to passing through the purified water during humidification, the humidification tank 314 is equipped with an electric heating tube 316 to heat the purified water. Increasing the water temperature also enhances the humidification effect. The water temperature is reflected in real time by the water temperature sensor 317. After humidification is completed, the gas flows out of the humidification tank 314 through the humidification outlet valve 313. Over time, bacteria may grow in the humidifier tank 314 due to the presence of water. Therefore, a unit sterilization function is provided. This can be achieved by closing the humidifier outlet valve 313, the purified water replenishment valve 320, and the humidifier inlet valve 321, closing all inlets and outlets of the humidity control device 124, opening the pure steam inlet valve 311 to introduce steam, and opening the humidifier drain valve 318 to discharge residual water and condensate through the humidifier steam trap 319.

[0115] In this embodiment, as Figure 1 As shown, the main gas supply line is equipped with a main gas source pressure sensor 44, a main gas supply check valve 02, and a main gas supply activation valve 03 in sequence. The main gas source pressure sensor 44 is used to measure the pressure of the main gas supply line, the main gas supply check valve 02 prevents gas backflow in the main gas supply line, and the main gas supply activation valve 03 is used to control the flow of the main gas supply line.

[0116] A detection pipeline is connected between the main gas supply check valve 02 and the main gas supply activation valve 03. The end of the detection pipeline away from the main gas supply line is connected to the first detection branch and the second detection branch. The first detection branch is equipped with a discharge valve 05, which is used to discharge unqualified gases. The second detection branch is equipped with a purification valve 04, a carbon monoxide catalyst 227 and a carbon dioxide adsorber 228. The purification valve 04 is used to switch the pipeline to the carbon monoxide catalyst 227 and the carbon dioxide adsorber 228 to purify the gas. The end of the second detection branch away from the detection pipeline is connected to the gas inlet of the gas storage tank 114.

[0117] In this embodiment, the gas transmission line is also equipped with a gas storage tank check valve 08, a gas storage tank outlet valve 09, a gas transmission pipe pressure reducing valve 10, and a gas transmission pipe pressure sensor 48. The gas storage tank check valve 08 is used to prevent gas backflow in the gas transmission line, the gas storage tank outlet valve 09 is used to control the gas flow in the gas transmission line, the gas transmission pipe pressure reducing valve 10 is used to reduce the gas pressure in the gas transmission line, and the gas transmission pipe pressure sensor 48 is used to monitor the gas pressure in the gas transmission line.

[0118] The gas transmission branch pipe is also equipped with a branch pipe maintenance ball valve 11, a branch pipe pressure sensor 49, and a branch pipe check valve 12. The branch pipe maintenance ball valve 11 is used to cut off the gas transmission branch pipe during maintenance, the branch pipe pressure sensor 49 is used to monitor the gas pressure of the gas transmission branch pipe, and the branch pipe check valve 12 is used to prevent gas backflow in the gas transmission branch pipe.

[0119] All of the above-mentioned valves (except manual valves) and sensors are electrically connected to the control center 121 and are uniformly controlled by the control center 121.

[0120] Example 2

[0121] This embodiment provides a gas supply process for a life support system in a biosafety laboratory, as detailed below:

[0122] The main air supply source 118 serves as the supply source, consisting of a main air compressor 110 and a backup air compressor 111. Only one of the two compressors works at a time, and they switch between each other for backup within a set time. During maintenance, the air compressor back valve 01 of the air compressor unit that needs maintenance can be closed. The start-stop control pressure is the detection value of the main air source pressure sensor 44. After compression, the gas first passes through the pre-filter group 222 for preliminary filtration to remove oil and most of the moisture. Then, it is cooled to 25°C by the cooling heat exchanger 112. The moisture generated during the cooling process is discharged through the heat exchanger drain 15. The cooled gas enters the dryer 113 for drying. The dew point temperature of the dried gas can be adjusted at any time to adapt to the comfort of laboratory personnel using the gas. The dried gas passes through a post-filter assembly 223. A main gas source gas quality monitoring point 45 is located at the rear end of the post-filter assembly 223. This monitoring point 45 is directly connected to the control center 121 via a first gas concentration monitoring pipeline for gas quality analysis. The gas then passes through the main gas supply check valve 02 and the main supply activation valve 03 before entering the gas storage tank 114. An automatic drain valve 07 is installed at the bottom of the gas storage tank 114 to drain any moisture present in the tank due to dryness adjustment. A valve 06 before the drain valve shuts off the gas storage tank 114, facilitating maintenance or replacement of the automatic drain valve 07. A gas quality monitoring point 47 is set at the outlet of the gas storage tank 114 to monitor the air quality at the outlet of the gas storage tank 114. A one-way valve 08 prevents gas backflow. A gas outlet valve 09 is used to disconnect the gas storage tank 114 from the downstream transmission line. After passing through the one-way valve 08 and the outlet valve 09, the gas is depressurized by the gas pipeline pressure reducing valve 10 and enters the gas transmission line. A gas pipeline pressure sensor 48 is set on the gas transmission line to detect the pressure of the gas transmission line. Then, the gas passes through the activated carbon filter group 224, the dust removal filter group 225 and the sterilization filter group 226 in sequence for deodorization and filtration before entering each gas transmission branch pipe. A branch pipe maintenance ball valve 11 is installed in the gas transmission branch pipe to cut off the gas source of the main gas transmission line for maintenance of the gas transmission branch pipe. The flow sensor 115 determines the gas usage status of the gas transmission branch pipe and records the gas flow rate. Subsequently, a branch pipe pressure sensor 49 detects the pressure of the gas transmission branch pipe, and a branch pipe temperature sensor 50 detects the temperature of the gas transmission branch pipe. The temperature can be adjusted by the pipe heating jacket 116. After passing through the branch pipe check valve 12, the gas enters the laboratory and supplies gas to each positive pressure protective clothing gas point.

[0123] When the gas quality exceeds the standard, the following situations apply:

[0124] (1) When the main gas source gas quality monitoring point 45 detects that the gas quality exceeds the standard, but the ambient gas quality monitoring unit 117 does not exceed the standard: the system judges that it may be due to the detection probe error, and the system will close the main supply valve 03 and open the discharge valve 05 to discharge the unqualified gas. During this period, the gas is supplied by the gas stored in the gas storage tank 114 and the pressure in the gas storage tank 114 is continuously monitored by the gas storage tank pressure sensor 46. When the pressure in the gas storage tank 114 drops to the gas transmission line, if the gas quality at the main gas source gas quality monitoring point 45 returns to normal, the system will open the main supply valve 03 and close the discharge valve 05 to restore the normal operation of the system. If the gas quality at the main gas source monitoring point 45 remains above standard during this period, the system will open the purification valve 04 and close the discharge valve 05. Gas will then pass through the carbon monoxide catalyst 227 and carbon dioxide adsorber 228 before being supplied to the system normally. The downstream gas storage tank outlet gas quality monitoring point 47 will be activated to continuously monitor the gas quality. If the gas quality at the gas storage tank outlet gas quality monitoring point 47 exceeds the standard, an alarm will be sent to the P4 laboratory control room to notify the laboratory personnel to evacuate, and the emergency support gas source 119 will be activated to assist in the evacuation. If the gas quality at the gas storage tank outlet gas quality monitoring point 47 does not exceed the standard during the activation of the carbon monoxide catalyst 227 and carbon dioxide adsorber 228, the system will continue to supply gas normally under this condition. When the gas quality at the main gas source monitoring point 45 returns to normal, the system will open the main supply activation valve 03 and close the discharge valve 05 to restore normal system operation.

[0125] (2) When the ambient gas quality monitoring unit 117 detects that the gas quality exceeds the standard: the system determines that the ambient gas quality exceeds the standard, and the system will activate the gas storage tank outlet gas quality monitoring point 47 in conjunction with the main gas source gas quality monitoring point 45 to detect the gas quality.

[0126] If the gas quality at the main gas source gas quality monitoring point 45 subsequently exceeds the standard, the system will close the main supply activation valve 03 and open the purification valve 04. Gas will then pass through the carbon monoxide catalyst 227 and the carbon dioxide adsorber 228 before being supplied to the system normally. The system will continuously monitor the gas quality at the gas storage tank outlet gas quality monitoring point 47. If the gas quality at the gas storage tank outlet gas quality monitoring point 47 is normal and the gas quality at both the ambient gas quality monitoring unit 117 and the main gas source gas quality monitoring point 45 returns to normal, the main supply activation valve 03 will be opened and the purification valve 04 will be closed. Monitoring at the gas storage tank outlet gas quality monitoring point 47 will then be cancelled, and the system will return to normal operation. If the gas quality at the gas storage tank outlet gas quality monitoring point 47 detects that the gas quality exceeds the standard, an alarm will be sent to the P4 laboratory control room to notify the laboratory personnel to evacuate, and the emergency support gas source 119 will be activated to assist in the evacuation.

[0127] If the gas quality monitoring point 45 of the main gas source does not exceed the standard, the system will maintain the monitoring of the gas quality at the gas storage tank outlet monitoring point 47. If the gas quality at the gas storage tank outlet monitoring point 47 does not exceed the standard, the gas supply will continue normally. When the gas quality at the gas storage tank outlet monitoring point 47 exceeds the standard, an alarm will be sent to the P4 laboratory control room to notify the experimental personnel to evacuate and to activate the emergency support gas source 119 to assist in the evacuation.

[0128] During the period, any abnormal air quality at all monitoring points will trigger on-site audible and visual alarms as well as SMS alerts. However, only alarms that determine the need to switch to emergency support gas source 119 and assist with evacuation will directly trigger an alarm in the P4 laboratory. Other alarms, in addition to on-site audible and visual alarms, will only notify laboratory personnel and maintenance staff via SMS. Handling and confirming on-site alarms will not directly interrupt laboratory personnel's work or notify them of evacuation. This hardware-based approach ensures the maximum possible continuity of laboratory operations.

[0129] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A life support system for a biosafety laboratory, characterized in that: It includes a main gas supply source (118), an emergency support gas source (119), a gas storage tank (114), and a control center (121). The outlet of the main gas supply source (118) is connected to the inlet of the gas supply main line. The outlet of the gas supply main line is connected to the inlet of the gas storage tank (114). The outlets of the gas storage tank (114) and the emergency support gas source (119) are both connected to the inlet of the gas transmission main line. The outlet of the gas transmission main line is connected to the inlet of multiple gas transmission branch pipes. The outlet of the gas transmission branch pipes is used to connect to several positive pressure protective clothing gas points. The gas supply line is provided with a pre-filter group (222), a cooling heat exchanger (112), a dryer (113) and a post-filter group (223) in sequence. The gas transmission line is sequentially equipped with an activated carbon filter group (224), a dust removal filter group (225), a sterilization filter group (226), and a temperature and humidity control unit; The main gas supply source (118), the emergency support gas source (119), and the dryer (113) are all electrically connected to the control center (121); The main air supply source (118) includes a main air compressor (110) and a backup air compressor (111). The outlet of the main air compressor (110) is connected to the inlet of the main air supply line through the main air supply pipeline, and the outlet of the backup air compressor (111) is connected to the inlet of the main air supply line through the backup air supply pipeline. Both the main air supply line and the backup air supply line are equipped with an air compressor back valve (01). Both the main air compressor (110) and the backup air compressor (111) are electrically connected to the control center (121); The emergency support air source (119) includes multiple compressed air cylinders, which are connected to the air inlet of the emergency support main line through an emergency support branch line, and the air outlet of the emergency support main line is connected to the air inlet of the main air supply line. Each of the aforementioned emergency support branches is sequentially equipped with a gas cylinder pressure sensor (51), a gas cylinder activation valve (20), a gas cylinder pressure reducing valve (19), and a gas cylinder check valve (18). The emergency support main line is provided with an emergency support gas source maintenance valve (17), an emergency support main pressure sensor (52), an emergency support gas source outlet pressure reducing valve (16), an emergency support check valve (13), and an emergency support activation valve (14) in sequence. The gas cylinder pressure sensor (51), the gas cylinder activation valve (20), the emergency support main pressure sensor (52), and the emergency support activation valve (14) are all electrically connected to the control center (121). The control center (121) is equipped with a first gas concentration monitoring instrument group and a second gas concentration monitoring instrument group, and the main gas supply source (118) is equipped with an environmental gas quality monitoring unit (117). The gas supply line is equipped with a main gas source gas quality monitoring point (45), and the gas transmission line is equipped with a gas storage tank outlet gas quality monitoring point (47). The main gas source gas quality monitoring point (45) is connected to the first gas concentration monitoring instrument group through the first gas concentration monitoring pipeline, and the gas storage tank outlet gas quality monitoring point (47) is connected to the second gas concentration monitoring instrument group through the second gas concentration monitoring pipeline. The first gas concentration monitoring instrument group, the second gas concentration monitoring instrument group and the environmental gas quality monitoring unit (117) all include a gas concentration monitoring tube, and the gas concentration monitoring tube is equipped with an oxygen concentration detector (146), a carbon monoxide concentration detector (147) and a carbon dioxide concentration detector (148). The gas concentration monitoring tubes in the first gas concentration monitoring instrument group and the second gas concentration monitoring instrument group are also equipped with gas concentration monitoring pressure reducing valves (145), and the gas concentration monitoring tubes in the environmental gas quality monitoring unit (117) are also equipped with air sampling pumps (162).

2. The life support system for a biosafety laboratory according to claim 1, characterized in that: The gas storage tank (114) is provided with a gas safety valve (21) at the top, a gas storage tank pressure sensor (46) is provided on the gas storage tank (114), an automatic drainer (07) is connected to the bottom drain outlet of the gas storage tank (114), a gas storage tank drainer front valve (06) is provided between the gas storage tank (114) and the automatic drainer (07), and a gas storage tank check valve (08) and a gas storage tank outlet valve (09) are provided at one end of the gas transmission line near the gas storage tank (114). The gas tank pressure sensor (46) and the gas tank outlet valve (09) are both electrically connected to the control center (121).

3. The life support system for a biosafety laboratory according to claim 1, characterized in that: The filter element used in the pre-filter group (222) has a filtration pore size of 3μm, the filter element used in the post-filter group (223) has a filtration pore size of 1μm, the filter element used in the activated carbon filter group (224) is an activated carbon filter element, the filter element used in the dust removal filter group (225) has a filtration pore size of 0.45μm, and the filter element used in the sterilization filter group (226) has a filtration pore size of 0.22μm. The pre-filter group (222), the post-filter group (223), the activated carbon filter group (224), the dust removal filter group (225), and the sterilization filter group (226) all include a main filter and a backup filter. The main filter is installed in the main filtration pipeline, and the backup filter is installed in the backup filtration pipeline. The main filtration pipeline and the backup filtration pipeline are connected in parallel. The main filter pipeline is provided with a main filter front valve (171) and a main filter rear valve (174), which are respectively located on the front and rear sides of the main filter; The backup filter pipeline is provided with a backup filter front valve (172) and a backup filter rear valve (175), which are respectively located on the front and rear sides of the backup filter. The main filter housing is provided with a main filter front-end pressure sensor (170) on the top, and the backup filter housing is provided with a backup filter front-end pressure sensor (173) on the top. The outlet ends of the main filter pipeline and the backup filter pipeline are equipped with filter back-end pressure sensors (176). The main filter front valve (171), the main filter rear valve (174), the backup filter front valve (172), the backup filter rear valve (175), the main filter front pressure sensor (170), the backup filter front pressure sensor (173), and the filter rear pressure sensor (176) are all electrically connected to the control center (121).

4. The life support system for a biosafety laboratory according to claim 1, characterized in that: The control center (121) is a control cabinet. The cabinet door is equipped with an HMI device (157), an emergency stop button (158), a reset button (159), and a control cabinet lock (160). The control cabinet contains a switch (149), a PLC controller (150), a switching power supply (151), a terminal block (152), a fuse terminal block (153), an intermediate relay group (154), a three-hole socket (155), and an air switch (156). The fuse terminal block (153) is electrically connected to the PLC controller (150), the PLC controller (150) is electrically connected to the intermediate relay group (154), and the switch (149) can be electrically connected to the PLC controller (150), the HMI device (157), the SMS alarm (122), and the P4 laboratory central control room host computer (123) respectively. The emergency stop button (158) and the reset button (159) are both electrically connected to the PLC controller (150); The top of the control cabinet is equipped with an audible and visual alarm (161), which is electrically connected to the PLC controller (150).

5. The life support system for a biosafety laboratory according to claim 1, characterized in that: The temperature and humidity control unit includes a temperature control device and a humidity control device (124). The temperature control device includes a pipe heating jacket (116), a branch pipe temperature sensor (50), and a flow sensor (115). The pipe heating jacket (116) is disposed on the outside of the gas transmission branch pipe, and the branch pipe temperature sensor (50) and the flow sensor (115) are disposed on the gas transmission branch pipe. The humidity control device (124) includes a humidifying tank (314). The upper end of the humidifying tank (314) is provided with a pure steam inlet pipe, and a pure steam inlet valve (311) is provided on the pure steam inlet pipe. The upper and lower ends of the humidifying tank (314) are respectively connected to two interfaces of a differential pressure level gauge (312). The humidifying outlet pipe of the humidifying tank (314) is provided with a humidifying outlet valve (313) and a humidity sensor (322). The humidifying inlet pipe of the humidifying tank (314) is provided with a humidifying inlet valve. (321) The purified water inlet pipe of the humidifying tank (314) is equipped with a purified water replenishment valve (320). The air outlet of the humidifying air inlet pipe is connected to an aeration coil (315). The aeration coil (315) is equipped with multiple aeration holes. The lower part of the humidifying tank (314) is equipped with an electric heating tube (316) and a water temperature sensor (317). The lower end of the humidifying tank (314) is equipped with a humidifying drain pipe. The humidifying drain pipe is equipped with a humidifying drain valve (318) and a humidifying drain valve (319).

6. The life support system for a biosafety laboratory according to claim 1, characterized in that: The main gas supply line is equipped with a main gas source pressure sensor (44), a main gas source check valve (02), and a main gas supply activation valve (03). A detection pipeline is connected between the main gas source check valve (02) and the main gas supply activation valve (03). The end of the detection pipeline away from the main gas supply line is connected to a first detection branch and a second detection branch. The first detection branch is equipped with a discharge valve (05). The second detection branch is equipped with a purification valve (04), a carbon monoxide catalyst (227), and a carbon dioxide adsorber (228). The end of the second detection branch away from the detection pipeline is connected to the gas inlet of the gas storage tank (114).

7. The life support system for a biosafety laboratory according to claim 1, characterized in that: The gas transmission line is also equipped with a gas storage tank check valve (08), a gas storage tank outlet valve (09), a gas transmission pipe pressure reducing valve (10), and a gas transmission pipe pressure sensor (48). The gas transmission branch is also equipped with a branch maintenance ball valve (11), a branch pressure sensor (49), and a branch check valve (12).

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