A gas partial pressure field equilibrium test system and test method for a saturation diving living chamber

Abstract

The present invention discloses a system and method for testing the partial pressure field balance of a saturation diving habitation chamber. The system includes a test chamber, an external air processing and delivery assembly, an in-cabin prototype assembly, a carbon dioxide release simulation assembly, an oxygen consumption simulation assembly, a sampling point calibration device, and a sampling device. Compressed oxygen from an oxygen cylinder is delivered to an air supply duct via an oxygen supply pipe and then flows into the test chamber via a distributed air supply device. A return air duct is connected to the distributed exhaust device to exhaust gas from the test chamber. The sampling point calibration device is used to calibrate the positions of various sampling points within the test chamber, and the sampling device is used to collect gas samples from the sampling points. By simulating gas changes under different operating conditions, the present invention accurately tests and analyzes the concentration distribution and partial pressure field balance of gas within the chamber, thereby improving the environmental control capabilities of the saturation diving habitation chamber.

Description

Technical Field

[0001] The present application belongs to the field of saturation diving environmental control, and specifically relates to a gas partial pressure field balance test system and test method for a saturation diving living chamber. Background Art

[0002] In deep-sea diving operations, saturation diving is a key technology that allows divers to operate underwater for extended periods at depths exceeding 120 meters. This technique relies on saturation diving chambers, where divers adapt to the high-pressure environment and then enter the deep-water operation area directly from within. The atmosphere in saturation diving chambers is typically a mixture of helium and oxygen. Divers may work continuously in this environment for up to a month, requiring regular oxygen supplementation to maintain health and normal physiological functions. Long-term residence in a sealed chamber exposes divers to increasing levels of harmful gases such as carbon dioxide, posing a threat to their health and even their lives.

[0003] However, existing designs often rely solely on numerical simulations, lacking an accurate test system to compare and verify simulation results. This makes it impossible to accurately test the concentration and distribution of oxygen and carbon dioxide under various operating conditions. Due to the lack of precise and reliable testing methods, the balance and distribution of gases within the chamber cannot be fully evaluated and optimized under different pressure and supply and exhaust air conditions. This situation not only impacts the design and improvement of environmental control systems but also poses potential risks to the safety and health of divers. Therefore, there is an urgent need for a test system that can simulate actual saturation diving environments to accurately test and analyze the concentration distribution and partial pressure field balance of gases within the chamber, thereby providing a scientific basis for optimizing and improving the environmental control system of divers' living chambers. Summary of the Invention

[0004] In response to the shortcomings of the existing technology, the present invention proposes a saturation diving living chamber partial pressure field balance test system, which aims to accurately test and analyze the concentration distribution and partial pressure field balance of the gas in the chamber through comprehensive simulation and actual testing, ensure the safety and health of divers in long-term high-pressure environments, and provide more reliable technical support for deep-sea diving operations.

[0005] To achieve the above-mentioned purpose, the technical solution of the present invention is as follows: a saturation diving living chamber gas partial pressure field balance test system includes a test chamber, an air treatment and delivery component outside the chamber, an in-cabin prototype component, a carbon dioxide release simulation component, an oxygen consumption simulation component, a sampling point calibration device, and a sampling device. The air treatment and delivery system outside the chamber includes an oxygen cylinder, an oxygen supply pipe, an air supply pipe, a return air pipe, a fan and an air treatment device; the in-cabin prototype component includes a distributed air supply device, a distributed exhaust device, a simulated human body, a simulated bed and a simulated table; the simulated human body is arranged on the simulated bed and the simulated table; the compressed oxygen in the oxygen cylinder is connected to the air supply pipe through the oxygen supply pipe pipe, and then communicated with the interior of the test chamber through a distributed air supply device; the return air duct is connected to the distributed exhaust device, used to discharge the gas in the test chamber, and under the action of the fan, part of the gas passes through the air treatment device and then flows into the test chamber again; the carbon dioxide release simulation component includes a carbon dioxide cylinder and a first flow metering control device; the oxygen consumption simulation component includes an oxygen consumption reaction bottle and a second flow metering control device; the carbon dioxide release simulation components and the oxygen consumption simulation components are the same in number and are arranged in one-to-one pairing; the sampling point calibration device is used to calibrate the position of each sampling point in the test chamber; the sampling device is used to collect gas samples at the sampling points.

[0006] In some embodiments, the distributed air supply device includes a main air supply port arranged at the top of the test cabin and connected to the air supply pipe, a straight air duct located at the top of the test cabin and connected to the main air supply port, and a plurality of arc-shaped air supply branches connected to the straight air duct, the air supply branch pipes extending downward from the top of the test cabin along the side wall, and the air supply branch pipes facing the side of the test cabin are provided with multiple air supply terminals arranged at intervals; the distributed exhaust device includes an exhaust pipe arranged at the bottom of the test cabin and arranged along the length direction of the test cabin, and a plurality of exhaust terminals are spaced apart on the exhaust pipe, and the exhaust pipe is connected to the main exhaust port arranged on the test cabin and connected to the outside through an annular pipe.

[0007] In some embodiments, the air supply pipe and the return air pipe are DN65 pipes, and the air volume of the fan is adjustable and not less than 4m 3 / h.

[0008] In some embodiments, the simulated human body includes at least one set of lying posture simulated human bodies and at least one set of sitting posture simulated human bodies, the number of the carbon dioxide release simulation components and the oxygen consumption simulation components is the same as the number of the simulated human bodies, and each pair of the carbon dioxide release simulation components and the oxygen consumption simulation components are arranged at the head position of the simulated human body.

[0009] In some embodiments, a cylindrical mixing chamber is further included, the mixing chamber including a first bottom surface and a second bottom surface opposite to each other along the axial direction, and a side surface parallel to the axial direction and connected to the first bottom surface and the second bottom surface. An oxygen-consuming air inlet pipe, a carbon dioxide air inlet pipe and a mixing exhaust pipe are provided on the outer wall of the mixing chamber. The outlet of the oxygen-consuming reaction bottle is connected to the center position of the first bottom surface along the axial direction of the mixing chamber through the oxygen-consuming air inlet pipe. The carbon dioxide air inlet pipe is provided on the side surface of the mixing chamber close to the first bottom surface along the circumferential tangent direction of the mixing chamber. The mixing exhaust pipe is provided at the center position of the second bottom surface of the mixing chamber along the axial direction of the mixing chamber. A humidifying cotton cloth and a spiral heating wire are provided on the inner wall of the mixing chamber.

[0010] In some embodiments, the air treatment device includes a purification unit, a humidity control unit, a temperature control unit and a bypass pipe connected in sequence, and the two ends of the bypass pipe correspond to the inlet side of the humidity control unit and the outlet side of the temperature control unit respectively.

[0011] In some embodiments, the sampling points are arranged at equal intervals along the length, width, and height directions of the test chamber, and the sampling points are greater than or equal to 500 mm from the edge of the test chamber.

[0012] Another embodiment of the present invention provides a test method based on the saturation diving living chamber gas partial pressure field equalization test system, comprising the following steps:

[0013] S1. Arrange the sampling devices at the sampling points in the test chamber according to the instructions of the sampling point calibration device; arrange the simulated human bodies according to the working condition requirements, wherein the working conditions include at least: (i) all the simulated human bodies are in a lying position and are placed on a simulation bed; (ii) all the simulated human bodies are in a sitting position and are placed on a simulation table; (iii) the simulated human bodies include at least one simulated human body in a lying position and at least one simulated human body in a sitting position, the lying position simulated human body is placed on the simulation bed, and the sitting position simulated human body is placed on the simulation table;

[0014] S2, starting a carbon dioxide release simulation component and an oxygen consumption simulation component located on the head of the simulated human body, and adjusting a carbon dioxide release rate of the carbon dioxide release simulation component and an oxygen consumption rate of the oxygen consumption simulation component according to the posture of the simulated human body;

[0015] S3. Collecting gas samples at each sampling point under different operating conditions for the first time according to a preset sampling frequency; detecting the oxygen concentration and carbon dioxide concentration in the gas samples to determine a first concentration distribution of oxygen and carbon dioxide at each sampling point in the test chamber under different operating conditions;

[0016] S4, controlling the operation of the air processing and delivery system outside the chamber, the distributed air supply device, and the distributed exhaust device to replenish oxygen into the test chamber and exhaust the gas in the test chamber through the distributed exhaust device;

[0017] S5. Collecting gas samples from each sampling point for a second time at the preset sampling frequency, detecting oxygen concentration and carbon dioxide concentration in the gas samples, and determining a second concentration distribution of oxygen and carbon dioxide at each sampling point in the test chamber under different operating conditions; and determining a equilibrium recovery time of the gas partial pressure field based on the first concentration distribution and the second concentration distribution;

[0018] S6. In response to the balance recovery time being greater than the preset time, adjust the flow rate of at least one of the extravehicular air processing and delivery system, the distributed air supply device, and the distributed air exhaust device, and return to step S5.

[0019] In some embodiments, step S4 includes: controlling the switch of the air supply end of the distributed air supply device and / or the switch of the exhaust end of the distributed exhaust device according to the concentration distribution of oxygen and carbon dioxide in the test chamber under each working condition.

[0020] In some embodiments, step S5 includes: determining the first recovery time required for the oxygen concentration and carbon dioxide concentration of each sampling point to recover to a preset concentration threshold under different operating conditions based on the first concentration distribution and the second concentration distribution, and the second recovery time required for the difference between the oxygen concentration and the carbon dioxide concentration of any two sampling points to be less than the set value at the same time; and determining the maximum value of the sum of the first recovery time and the second recovery time as the equilibrium recovery time.

[0021] The beneficial effects of the present invention are as follows:

[0022] (1) By comprehensively simulating various working conditions in an actual saturation diving environment, the system can accurately test and analyze the concentration distribution and partial pressure field balance of the gas in the cabin, effectively filling the gap in existing technologies that rely solely on numerical simulations and lack practical verification, ensuring that there is sufficient oxygen in the cabin and that the carbon dioxide concentration remains within a safe range.

[0023] (2) The carbon dioxide release simulation component and oxygen consumption simulation component equipped in the system can accurately simulate the breathing process of the diver. Through the carbon dioxide cylinder and the first flow metering control device, the oxygen consumption reaction bottle and the second flow metering control device, the gas composition control is accurate and reliable, and the changes in gas concentration caused by the diver's breathing in different postures can be more accurately simulated. At the same time, by setting up multiple sampling points in the test chamber, the sampling device is used for real-time monitoring and recording to ensure dynamic control of the gas state in the chamber.

[0024] (3) The design of the distributed air supply and exhaust devices enables the airflow to be evenly distributed in the cabin, achieving effective circulation of the air in the cabin and improving the uniformity and stability of the gas distribution. In addition, the distributed air supply and exhaust can more accurately adjust the concentration of local areas according to the concentration distribution, thereby shortening the equilibrium time of the gas partial pressure field in the cabin, providing reliable data support for optimizing the environmental control system of the diver's living cabin, ensuring the safety and health of the divers, and reducing the potential harm to the human body caused by abnormal partial pressure field in the cabin. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] One or more embodiments are exemplarily illustrated by corresponding drawings, which do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0026] Figure 1 A front view of a test cabin according to an embodiment of the present invention;

[0027] Figure 2 A top view of a test chamber according to an embodiment of the present invention;

[0028] Figure 3 A schematic diagram of an outboard air processing and delivery assembly and an inboard prototype assembly according to an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of a distributed air supply device according to an embodiment of the present invention.

[0030] Figure 5 This is a schematic diagram of a distributed exhaust device according to an embodiment of the present invention.

[0031] Figure 6 A schematic diagram of an air treatment device according to an embodiment of the present invention;

[0032] Figure 7 This is a schematic diagram of the front structure of the mixing chamber shown in an embodiment of the present invention;

[0033] Figure 8 A schematic diagram of the side structure of a mixing chamber according to an embodiment of the present invention;

[0034] Figure 9 This is a flow chart of a method for testing the partial pressure field balance of a saturation diving living chamber according to an embodiment of the present invention.

[0035] Figure numerals: 1-test cabin; 2-oxygen cylinder; 3-oxygen supplementary pipe; 4-air supply pipe; 5-return air pipe; 6-fan; 7-air handling device; 8-distributed air supply device; 9-distributed exhaust device; 10-simulated human body; 11-simulated bed; 12-simulated table; 13-partition; 14-carbon dioxide cylinder; 15-oxygen consumption reaction bottle; 16-sampling point; 17-mixing chamber; 18-oxygen consumption inlet pipe; 19-carbon dioxide inlet pipe; 20-mixing exhaust pipe; 21-humidified cotton cloth; 22-spiral heating wire; 71-purification unit; 72-humidity control unit; 73-temperature control unit; 74-bypass pipe; 81-main air supply port; 82-straight air duct; 83-air supply branch pipe; 84-air supply terminal; 91-exhaust pipe; 92-exhaust terminal; 93-annular duct; 94-main exhaust port. DETAILED DESCRIPTION

[0036] To facilitate understanding of the present invention, the present invention is described in more detail below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly attached to the other element, or one or more elements can be interposed therebetween. When an element is described as being "connected to" another element, it can be directly connected to the other element, or one or more elements can be interposed therebetween. The terms "vertical," "horizontal," "left," "right," "inner," "outer," and similar expressions used in this specification are for illustrative purposes only. In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating relative importance or implicitly specifying the number of technical features indicated. Therefore, unless otherwise specified, features specified as "first" or "second" may explicitly or implicitly include one or more of such features; "plurality" means two or more. The term "comprising" and any variations thereof are intended to be non-exclusive, and one or more other features, integers, steps, operations, units, components, and / or combinations thereof may be present or added.

[0037] In addition, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or internal communication between two components. All technical and scientific terms used in this specification have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs. The terms used in the description of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more related listed items.

[0038] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0039] See also Figure 1-8 This embodiment provides a saturation diving habitation chamber partial pressure field equalization test system, comprising a test chamber 1, an external air processing and delivery assembly, an internal prototype assembly, a carbon dioxide release simulation assembly, an oxygen consumption simulation assembly, a sampling point calibration device, and a sampling device. The test chamber 1 is used to simulate the living and working environment of a diver in a saturation diving environment.

[0040] The extravehicular air handling and delivery system includes an oxygen cylinder 2, an oxygen supply pipe 3, an air supply pipe 4, a return air pipe 5, a fan 6, and an air handling unit 7. Compressed oxygen from the oxygen cylinder 2 is transported through the oxygen supply pipe 3 to the air supply pipe 4, and then flows into the test chamber 1 via the distributed air supply unit 8. In this way, the extravehicular air handling and delivery system provides fresh air to the test chamber 1, ensuring an adequate oxygen supply within the chamber. The in-cabin prototype components include the distributed air supply unit 8, the distributed exhaust unit 9, a simulated human body 10, a simulated bed 11, a simulated table 12, and a partition 13. These components simulate the actual living and working environment of a diver in the chamber, making the experiment more realistic and effective. The simulated human body 10, simulated bed 11, simulated table 12, and partition 13 are used to recreate the living conditions of a diver in a high-pressure environment, allowing for more accurate testing and analysis of gas distribution and balance. The return air pipe 5 is connected to the distributed exhaust unit 9 to exhaust the gas within the test chamber 1. Under the action of the fan 6, some of the gas flows back into the test chamber 1 through the air handling unit 7. Through this circulation system, the air in the cabin is constantly renewed, which is more conducive to maintaining the stability and balance of the gas composition.

[0041] The carbon dioxide release simulation component includes a carbon dioxide cylinder 14 and a first flow metering control device, and the oxygen consumption simulation component includes an oxygen consumption reaction bottle 15 and a second flow metering control device. An oxygen scavenger, such as activated iron powder, can be set inside the oxygen consumption reaction bottle 15 to absorb the oxygen in the cabin, thereby simulating the consumption of oxygen. The carbon dioxide cylinder 14 can release carbon dioxide to the outside to simulate the carbon dioxide released by the diver's breathing. These simulation components are used to simulate the diver's breathing process to ensure the accuracy and repeatability of the experimental conditions. The sampling point calibration device is used to calibrate the specific position of each sampling point 16 in the test cabin 1. The sampling device includes a sampling bag and a sampling tube. The sampling point calibration device ensures that the position of the sampling point is accurate. The sampling bag and the sampling tube are used to collect gas samples in the cabin at different positions and time points to perform real-time monitoring and analysis of oxygen and carbon dioxide concentrations.

[0042] The test system of this invention can effectively test and analyze the concentration distribution and partial pressure field balance of gases within the chamber, providing reliable data support for optimizing the environmental control system of the diver's living chamber. This system design simulates the actual deep-sea diving environment, ensuring the safety and health of divers in prolonged high-pressure environments.

[0043] In some embodiments, the distributed air supply device 8 includes a main air supply port 81 provided at the top of the test cabin 1 and connected to the air supply pipe 4, a straight air duct 82 located at the top of the test cabin 1 and connected to the main air supply port 81, and a plurality of arc-shaped air supply branches 83 connected to the straight air duct 82, the air supply branches 83 extending downward along the side wall from the top of the test cabin 1. This ensures that the airflow can be evenly distributed throughout the cabin, thereby avoiding the phenomenon of local airflow being too strong or too weak. The air supply branch 83 is provided with a plurality of air supply terminals 84 arranged on one side facing the inside of the test cabin 1. These terminals are used to evenly deliver gas into various parts of the test cabin 1, ensuring that the fresh air in the cabin is kept within an appropriate range. The distributed exhaust device 9 includes an exhaust pipe 91 provided near the bottom of the test cabin 1 and arranged along the length of the test cabin 1. This arrangement helps to effectively discharge the exhaust gas in the cabin and prevent the accumulation of harmful gases in the cabin. Exhaust pipe 91 is evenly distributed with multiple exhaust terminals 92, which ensure uniform and effective exhaust. Exhaust pipe 91 is connected to a main exhaust port 94 on test chamber 1, which is connected to the outside, via a ring duct 93. This allows for smooth exchange of air inside and outside the chamber, maintaining a stable and comfortable environment. This distributed air supply device 8 and distributed exhaust device 9 optimizes the airflow within test chamber 1, helping to maintain a balanced partial pressure field within the chamber.

[0044] In some embodiments, the air supply pipe 4 and the return air pipe 5 are DN65 pipes. This pipe diameter selection ensures the efficiency and stability of gas circulation. The air volume of the fan 6 is adjustable and is not less than 4m 3 / h. The adjustability of air volume enables the system to flexibly adjust the air volume according to different experimental conditions and requirements, ensuring the dynamic balance and uniform distribution of the gas environment in the cabin.

[0045] There are eight sets of simulated human bodies 10, including four sets in a lying position and four sets in a sitting position. The simulated human bodies 10 can be arranged according to the working conditions, including at least the following: (i) all simulated human bodies 10 are in a lying position, for example, four sets of simulated human bodies in a lying position, and the simulated human bodies are placed on a simulated bed. This working condition is used to simulate the life of a diver at night; (ii) all simulated human bodies 10 are in a sitting position, for example, four sets of simulated human bodies in a lying position, and the simulated human bodies are placed on a simulated table. This working condition is used to simulate the life of a diver during the day; (iii) the simulated human bodies 10 include at least one simulated human body in a lying position and at least one simulated human body in a sitting position, for example, two sets of simulated human bodies in a lying position and two sets of simulated human bodies in a sitting position. The lying position simulated human bodies are placed on the simulated bed, and the sitting position simulated human bodies are placed on the simulated table. This working condition can be used to simulate a semi-sleeping, semi-working life state. By designing a variety of different working conditions, the activity state of a diver in different time periods can be realistically simulated, ensuring the comprehensiveness and accuracy of the experiment. Through such a setting, the cabin always maintains a configuration of 4 people, whether it is day or night, it can accurately simulate the actual life and work status of divers and provide more realistic experimental data. The carbon dioxide release simulation component and the oxygen consumption simulation component are set at the head position of the simulated human body 10. Such a setting can more accurately simulate the human body's breathing process and ensure the accuracy of gas exchange. The carbon dioxide release simulation component is used to simulate the process of divers exhaling carbon dioxide, while the oxygen consumption simulation component is used to simulate the oxygen consumption process. In this way, the dynamic changes of the gas in the cabin can be more realistically reflected. In some embodiments, the carbon dioxide release simulation component and the oxygen consumption simulation component can further adjust the corresponding carbon dioxide release rate and oxygen consumption rate according to the sleep and work status, so as to better adapt to the corresponding working conditions.

[0046] In some embodiments, the saturation diving habitation chamber gas partial pressure field equalization test system further includes a cylindrical mixing chamber 17, the outer wall of which is provided with an oxygen inlet pipe 18, a carbon dioxide inlet pipe 19, and a mixing exhaust pipe 20. The outlet of the oxygen-consuming reaction bottle 15 is connected to the center of the first bottom surface of the mixing chamber 17 along the axis of the mixing chamber 17 via the oxygen inlet pipe 18, ensuring that oxygen can directly enter the core area of the mixing chamber 17, thereby quickly and evenly mixing with other gases. The carbon dioxide inlet pipe 19 is arranged on the side of the mixing chamber 17 near the first bottom surface and along the circumferential tangent direction of the mixing chamber 17. This arrangement helps the carbon dioxide gas form a rotating airflow when entering the mixing chamber 17, further promoting gas mixing and uniform distribution. The mixing exhaust pipe 20 is arranged at the center of the second bottom surface of the mixing chamber 17 along the axis of the mixing chamber 17, ensuring that the mixed gas can be discharged smoothly and preventing gas from being retained in the mixing chamber 17. Oxygen consumption reaction bottle 15 contains an oxygen scavenger that reacts with oxygen in the air without producing other gases, thereby simulating the oxygen consumption process. The first and second flow metering control devices can respectively control the flow rate of carbon dioxide production and the rate of oxygen consumption. Based on set conditions, this can simulate human breathing processes in different activity states, such as sleep and work.

[0047] The inner wall of mixing chamber 17 is also lined with a humidifying cotton cloth 21 and a spiral heating wire 22. The humidifying cotton cloth 21 simulates the humidity generated by human breathing, maintaining the humidity of the gas within mixing chamber 17 close to that of a real breathing environment. The spiral heating wire 22 heats the gas within mixing chamber 17, simulating the heat released by human breathing and ensuring that the gas temperature matches the human respiratory environment. This design allows mixing chamber 17 to more realistically simulate the gas conditions of human breathing, providing more accurate experimental data and providing reliable simulation support for divers living and working in high-pressure environments.

[0048] The air treatment device 7 includes a purification unit 71, a humidity control unit 72, a temperature control unit 73 and a bypass pipe 74 connected in sequence. The two ends of the bypass pipe 74 correspond to the inlet side of the humidity control unit 72 and the outlet side of the temperature control unit 73, respectively. Specifically, the purification unit 71 is used to remove impurities and particulate matter in the air to ensure that the air entering the test chamber 1 is clean. The humidity control unit 72 is used to adjust the humidity of the air to ensure that the humidity in the chamber is appropriate and simulate the humidity changes in the human breathing environment. The temperature control unit 73 is used to adjust the temperature of the air to ensure that the temperature in the chamber is within an appropriate range and provide a comfortable experimental environment. The design of the bypass pipe 74 allows the air to be directly sent into the test chamber 1 through the bypass pipe 74 under normal pressure conditions where temperature and humidity do not need to be controlled, without passing through the humidity control unit 72 and the temperature control unit 73, thereby simplifying the system operation and improving efficiency.

[0049] Under normal pressure conditions, since the temperature and humidity of the air have little impact on the human body, the temperature and humidity within Test Chamber 1 can be simply adjusted through natural ventilation or conventional equipment, eliminating the need for precise temperature and humidity control. However, under pressurized conditions, due to the significant increase in air pressure, the physical properties of the air and the physiological needs of the human body become more stringent, requiring precise temperature and humidity control to ensure a stable and comfortable chamber environment, thereby guaranteeing the safety and health of the divers. This flexible air handling design allows the system to better simulate the various operating conditions found in actual diving environments, safeguarding the safety and health of divers.

[0050] The center length of test chamber 1 is 4200mm, and the center height and width are both 2000mm, effectively simulating the actual living and working environment of divers in a high-pressure environment. Based on the simulation results and the cabin structure, 7 to 15 typical locations were selected as sampling points. The principles for selecting sampling points include the following: First, the sampling points must be representative and able to reflect the overall distribution of gas in the cabin; second, the sampling points must be selected based on the gas concentration distribution of the simulation results to ensure that the sampling point locations are scientific and reasonable; in addition, the air supply jet area should be avoided to prevent the airflow from directly affecting the accuracy of the sampling results; finally, the sampling points should not be too close to the corners or walls to prevent edge effects from interfering with the data.

[0051] Sampling points are evenly spaced along the center length and at least 500mm from the edge of test chamber 1. This layout ensures that the sampling points cover the entire interior of test chamber 1, providing comprehensive gas concentration data. Sampling points are also evenly spaced along the center height and width, and at least 500mm from the edge of test chamber 1. This prevents edge effects from affecting sampling results and ensures more representative and accurate data. This arrangement ensures that gas sampling points within test chamber 1 are fully covered at different heights and locations, ensuring accurate measurement and analysis of gas concentration distribution within the chamber.

[0052] See also Figure 9 Another embodiment of the present invention further discloses a test method based on the above-mentioned saturation diving living chamber gas partial pressure field equalization test system, comprising the following steps:

[0053] S1. Arrange the sampling devices at the sampling points in the test chamber according to the instructions of the sampling point calibration device; arrange the simulated human body 10 according to the working condition requirements, and the working conditions include at least: (i) all the simulated human bodies 10 are simulated human bodies in a lying position, and the simulated human bodies are placed on a simulated bed; (ii) all the simulated human bodies 10 are simulated human bodies in a sitting position, and the simulated human bodies are placed on a simulated table; (iii) the simulated human bodies 10 include at least one simulated human body in a lying position and at least one simulated human body in a sitting position, the simulated human body in a lying position is placed on the simulated bed, and the simulated human body in a sitting position is placed on the simulated table.

[0054] S2, start the carbon dioxide release simulation component and the oxygen consumption simulation component located on the head of the simulated human body 10, and adjust the carbon dioxide release rate of the carbon dioxide release simulation component and the oxygen consumption rate of the oxygen consumption simulation component according to the posture of the simulated human body.

[0055] S3, collecting gas samples at each sampling point under different working conditions for the first time according to a preset sampling frequency; detecting the oxygen concentration and carbon dioxide concentration in the gas samples, and determining the first concentration distribution of oxygen and carbon dioxide at each sampling point in the test chamber under different working conditions.

[0056] S4, controls the operation of the air processing and delivery system outside the cabin, the distributed air supply device 8 and the distributed exhaust device 9, replenishes oxygen into the test cabin 1, and discharges the gas in the test cabin 1 through the distributed exhaust device 9.

[0057] S5. Collect gas samples from each sampling point for a second time at a preset sampling frequency, detect the oxygen concentration and carbon dioxide concentration in the gas samples, and determine the second concentration distribution of oxygen and carbon dioxide at each sampling point in the test chamber under different working conditions; and determine the equilibrium recovery time of the gas partial pressure field based on the first concentration distribution and the second concentration distribution.

[0058] S6, in response to the balance recovery time being greater than the preset time, adjust the flow rate of at least one of the extravehicular air processing and delivery system, the distributed air supply device 8 and the distributed air exhaust device 9, and return to step S5.

[0059] The sampling device can use a sampling bag to sample oxygen and carbon dioxide concentrations at several sampling points in the test chamber 1 from outside the chamber through a through-chamber pipeline. During the sampling process, the representativeness and accuracy of the samples are ensured to obtain reliable data.

[0060] In steps S3 and S5 , the concentration of the sampled gas is detected, and the oxygen and carbon dioxide concentration distributions at the sampling points at different sampling times are recorded to obtain a first concentration distribution and a second concentration distribution, respectively.

[0061] In some embodiments, step S4 includes: controlling the switch of the air supply end of the distributed air supply device 8 and / or the switch of the air exhaust end of the distributed air exhaust device 9 according to the first concentration distribution.

[0062] The first concentration distribution can be used to determine the oxygen consumption rate and carbon dioxide accumulation rate at each sampling point. Distributed air supply device 8 has multiple air supply terminals located at different locations. Based on the first concentration distribution, the air supply terminals corresponding to sampling points where the oxygen concentration is below a preset concentration threshold are opened, while the air supply terminals corresponding to sampling points where the oxygen concentration is above the preset concentration threshold remain closed. Similarly, based on the first concentration distribution, the multiple exhaust terminals located at different locations in distributed exhaust device 9 are controlled to be turned on and off, thereby specifically adjusting the gas concentration in the corresponding areas.

[0063] In some embodiments, step S5 includes: determining the first recovery time required for the oxygen concentration and carbon dioxide concentration at each sampling point to recover to a preset concentration threshold under different operating conditions based on the first concentration distribution and the second concentration distribution, and the second recovery time required for the difference in oxygen concentration and carbon dioxide concentration between any two sampling points to be less than or equal to the set value at the same time; and determining the maximum value of the sum of the first recovery time and the second recovery time corresponding to each sampling point as the equilibrium recovery time.

[0064] It is understandable that the preset concentration thresholds may include an oxygen concentration threshold and a carbon dioxide concentration threshold, and the oxygen concentration threshold and the carbon dioxide concentration threshold may be set individually as needed.

[0065] The second concentration distribution can represent the rate of change of oxygen and carbon dioxide concentrations at each sampling point during the oxygen supply and exhaust stage in the test chamber 1. Based on this concentration change rate, the first recovery time required for the oxygen and carbon dioxide concentrations at each sampling point to return to the preset concentration threshold can be estimated. At the same time, the partial pressure field balance of the gas in the chamber also needs to consider the second recovery time required for the concentrations between multiple sampling points to reach equilibrium. Specifically, the time required for the difference in oxygen and carbon dioxide concentrations between any two sampling points to be less than or equal to the set value can be calculated. Since each sampling point corresponds to a first recovery time, and any two sampling points can calculate a second recovery time, the sum of the first recovery time and the second recovery time is calculated, and the maximum value of the result is used as the equilibrium recovery time of the entire test system.

[0066] In step S6, the equilibrium recovery time is compared with the preset time. If the equilibrium recovery time is greater than the preset time, it indicates that the current air supply scheme cannot meet the pressure field equilibrium requirement. This can be achieved by adjusting the flow rate of at least one of the extravehicular air processing and delivery system, the distributed air supply device 8, and the distributed exhaust device 9, thereby shortening the equilibrium recovery time until it is less than or equal to the preset time. The preset time can be determined by simulation calculation. In this way, the test method of this application can be used for verification and debugging to obtain the optimal gas equilibrium scheme, providing reliable data support and protection for the safety and health of divers.

[0067] Furthermore, the test conditions in step S3 include 16 combinations, including two chamber pressures: 1 bar or 10 bar; air volume at 25%, 50%, 75%, and 100%; and a choice of recumbent or seated postures. This diverse combination of test conditions comprehensively simulates the gas distribution experienced by divers under varying pressures and activity levels. Each condition represents a different environmental condition and operating state, resulting in more comprehensive and representative experimental data.

[0068] Furthermore, the sampling frequency in steps S3 and S5 is preset to every 30 seconds to every 1 minute. This sampling frequency ensures real-time monitoring of changes in gas concentration within the chamber and accurate data acquisition during different experimental phases. This frequent sampling helps capture dynamic changes in gas concentration and ensures accurate measurement of gas distribution and partial pressure field equilibrium time.

[0069] In summary, the present invention provides a saturation diving living chamber partial pressure field balance test system and test method, which includes a test chamber, an external air processing and delivery component, an in-cabin prototype component, a carbon dioxide release simulation component, an oxygen consumption simulation component, a sampling point calibration device and a sampling device. By providing an air processing device with a purification unit, a humidity control unit and a temperature control unit, and adopting a distributed air supply and exhaust device, the air in the cabin can be effectively circulated and regulated. In addition, by simulating the human breathing process, accurately arranging sampling points, and combining various test conditions, the system can comprehensively and accurately simulate and test the concentration distribution and partial pressure field balance of the gas in the cabin. The test method of the present invention includes installing and connecting various components, calibrating and calibrating sampling points, setting test conditions, simulating the human breathing process, delivering and circulating gas, real-time sampling and data analysis. The method ensures the accuracy and reliability of the experimental data by performing multiple sampling under different working conditions. This invention not only effectively simulates the living and working conditions of divers in a saturated diving environment, but also provides detailed gas distribution data, verifies the equilibrium time of the gas partial pressure field within the cabin, and provides a scientific basis for optimizing the environmental control system of the diver's living chamber, ensuring the safety and health of the diver. This invention further improves the level of protection for divers in deep-sea operations and has significant practical value and application prospects.

[0070] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above. For the sake of simplicity, they are not provided in detail. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in this field should understand that it is still possible to modify the technical solutions described in the above embodiments, or to make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A saturation diving living chamber gas partial pressure field balance test system, characterized in that: It includes a test cabin, an extravehicular air processing and delivery system, an in-cabin prototype component, a carbon dioxide release simulation component, an oxygen consumption simulation component, a sampling point calibration device, and a sampling device. The extravehicular air processing and delivery system includes an oxygen cylinder, an oxygen supplementation pipe, an air supply pipe, a return air pipe, a fan, and an air processing device. The cabin prototype assembly includes a distributed air supply device, a distributed air exhaust device, a simulated human body, a simulated bed and a simulated table; the simulated human body is arranged on the simulated bed and the simulated table; The compressed oxygen in the oxygen cylinder is connected to the air supply pipe through the oxygen supply pipe, and then connected to the interior of the test chamber through the distributed air supply device; the return air pipe is connected to the distributed exhaust device, which is used to discharge the gas in the test chamber, and under the action of the fan, part of the gas passes through the air treatment device and then flows into the test chamber again; The carbon dioxide release simulation component includes a carbon dioxide gas cylinder and a first flow metering control device; the oxygen consumption simulation component includes an oxygen consumption reaction bottle and a second flow metering control device; The sampling point calibration device is used to calibrate the position of each sampling point in the test chamber; the sampling device is used to collect gas samples at the sampling points; It also includes a cylindrical mixing chamber, which includes a first bottom surface and a second bottom surface opposite to each other along the axial direction, and a side surface parallel to the axial direction and connected to the first bottom surface and the second bottom surface. An oxygen-consuming air inlet pipe, a carbon dioxide air inlet pipe and a mixing exhaust pipe are provided on the outer wall of the mixing chamber. The outlet of the oxygen-consuming reaction bottle is connected to the center position of the first bottom surface along the axial direction of the mixing chamber through the oxygen-consuming air inlet pipe. The carbon dioxide air inlet pipe is provided on the side surface of the mixing chamber close to the first bottom surface along the circumferential tangent direction of the mixing chamber. The mixing exhaust pipe is provided at the center position of the second bottom surface of the mixing chamber along the axial direction of the mixing chamber. A humidifying cotton cloth and a spiral heating wire are provided on the inner wall of the mixing chamber.

2. The saturation diving living chamber gas partial pressure field equalization test system according to claim 1, characterized in that: The distributed air supply device includes a main air supply port arranged at the top of the test cabin and connected to the air supply pipe, a straight air duct located at the top of the test cabin and connected to the main air supply port, and a plurality of arc-shaped air supply branches connected to the straight air duct, the air supply branches extend downward along the side wall from the top of the test cabin, and the air supply branches have a plurality of air supply terminals arranged at intervals on one side facing the inside of the test cabin; the distributed exhaust device includes an exhaust pipe arranged at the bottom of the test cabin and arranged along the length direction of the test cabin, a plurality of exhaust terminals are distributed at intervals on the exhaust pipe, and the exhaust pipe is connected to the main air outlet arranged on the test cabin and connected to the outside through an annular pipe.

3. The gas partial pressure field equalization test system for a saturation diving living chamber according to claim 2, characterized in that: The air supply pipe and return air pipe adopt DN65 pipe, and the air volume of the fan is adjustable and not less than 4m 3 / h.

4. The saturation diving living chamber gas partial pressure field equalization test system according to claim 1, characterized in that: The simulated human body includes at least one set of simulated human bodies in a lying position and at least one set of simulated human bodies in a sitting position. The number of the carbon dioxide release simulation components and the oxygen consumption simulation components is the same as the number of the simulated human bodies, and each pair of the carbon dioxide release simulation components and the oxygen consumption simulation components are arranged at the head position of the simulated human body.

5. The gas partial pressure field equalization test system for a saturation diving living chamber according to claim 1, characterized in that: The air treatment device includes a purification unit, a humidity control unit, a temperature control unit and a bypass pipeline connected in sequence, and two ends of the bypass pipeline correspond to the inlet side of the humidity control unit and the outlet side of the temperature control unit respectively.

6. The gas partial pressure field equalization test system for a saturation diving living chamber according to claim 5, characterized in that: The sampling points are arranged at equal intervals along the length, width and height directions of the test chamber, and the distance between the sampling points and the edge of the test chamber is greater than or equal to 500 mm.

7. A test method for a saturation diving habitation chamber gas partial pressure field equalization test system according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1. Arrange the sampling device at each sampling point in the test chamber according to the instructions of the sampling point calibration device; The simulated human bodies are arranged according to working condition requirements, wherein the working conditions at least include: (i) all the simulated human bodies are in a resting position and are placed on a simulated bed; (ii) All of the simulated human bodies are in a sitting position and are placed on a simulation table; (iii) the simulated human bodies include at least one simulated human body in a lying position and at least one simulated human body in a sitting position, the simulated human body in a lying position is placed on a simulation bed, and the simulated human body in a sitting position is placed on a simulation table; S2, starting a carbon dioxide release simulation component and an oxygen consumption simulation component located on the head of the simulated human body, and adjusting a carbon dioxide release rate of the carbon dioxide release simulation component and an oxygen consumption rate of the oxygen consumption simulation component according to the posture of the simulated human body; S3. Collecting gas samples at each sampling point under different working conditions for the first time according to a preset sampling time; detecting the oxygen concentration and carbon dioxide concentration in the gas samples to determine a first concentration distribution of oxygen and carbon dioxide at each sampling point in the test chamber under different working conditions; S4, controlling the operation of the air processing and delivery system outside the chamber, the distributed air supply device, and the distributed exhaust device to replenish oxygen into the test chamber and exhaust the gas in the test chamber through the distributed exhaust device; S5. Collecting gas samples from each sampling point for a second time at a preset sampling frequency, detecting oxygen concentration and carbon dioxide concentration in the gas samples, and determining a second concentration distribution of oxygen and carbon dioxide at each sampling point in the test chamber under different operating conditions; and determining a equilibrium recovery time of the gas partial pressure field based on the first concentration distribution and the second concentration distribution; S6. In response to the balance recovery time being greater than the preset time, adjust the flow rate of at least one of the extravehicular air processing and delivery system, the distributed air supply device, and the distributed air exhaust device, and return to step S5.

8. The test method according to claim 7, characterized in that The step S4 includes: controlling the switch of the air supply terminal of the distributed air supply device and / or the switch of the air exhaust terminal of the distributed air exhaust device according to the first concentration distribution.

9. The test method according to claim 7 or 8, characterized in that The step S5 includes: determining, based on the first concentration distribution and the second concentration distribution, a first recovery time required for the oxygen concentration and the carbon dioxide concentration at each sampling point to recover to a preset concentration threshold under different operating conditions, and a second recovery time required for the difference between the oxygen concentration and the carbon dioxide concentration at any two sampling points to be less than or equal to a set value; and determining the maximum value of the sum of the first recovery time and the second recovery time as the equilibrium recovery time.

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