Plateau hyperbaric oxygen chamber vehicle based on automatic pressure control

Abstract

The invention belongs to the technical field of medical equipment, and particularly relates to a plateau hyperbaric oxygen cabin vehicle based on automatic pressure control, which comprises a square cabin, a control system, a fire extinguishing system, an oxygen supply system, a chassis and a stretcher lifting device, the interior of the square cabin is divided into an equipment room, an operation room and an oxygen cabin room; the control system comprises a PLC module, an environment monitoring unit, an environment adjusting unit, a pressure supply unit and a pressure adjusting unit. The device has high altitude environment adaptability, namely excellent cross-country ability, maneuverability and low-temperature adaptability, meanwhile, burden and requirements on operators can be relieved in a scientific pressure control mode, the probability of middle ear barotrauma of the rescued personnel in the treatment process is reduced, and the treatment effect of the rescued personnel is improved. The treatment efficiency of diseases such as plateau pulmonary edema or encephaledema is improved; the air quality in the oxygen cabin can be regulated and controlled in an automatic or manual mode according to real-time data; and the burden of workers in the plateau environment for carrying the wounded to get on and off the vehicle by using a stretcher is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical equipment, and in particular relates to a plateau hyperbaric oxygen chamber vehicle based on automatic pressure control. Background Art

[0002] The low-pressure environment of the plateau can cause various acute and chronic altitude sicknesses in the human body. In severe cases, people may suffer from diseases such as high-altitude pulmonary edema, pulmonary hypertension, high-altitude heart disease, cerebral hypoxia and cerebral edema, which seriously threaten people's lives. At this time, hyperbaric oxygen therapy is the preferred treatment method. Therefore, at the construction site or rescue site of the plateau, patients with acute altitude sickness must be given hyperbaric oxygen therapy in a timely manner to ensure the safety of their lives.

[0003] In the prior art, the patent with patent number CN 102429778 A discloses "a plateau pressurized medical support vehicle", but it records that the pressure in the hyperoxia cabin can reach up to 26kPa; in this pressure environment, it can only relieve the acute altitude reaction of the rescued personnel, and cannot treat fatal diseases such as high-altitude pulmonary edema and cerebral edema; and hyperbaric oxygen therapy (according to GB / T 12130-2020 "Oxygen Chamber", the working pressure of the medical oxygen pressurized chamber should be less than or equal to 0.2MPa; the working pressure of the oxygen chamber mentioned in this patent is also less than or equal to 0.2MPa, which belongs to the category of hyperbaric oxygen therapy) is the first choice for the treatment of fatal diseases such as high-altitude pulmonary edema and cerebral edema.

[0004] In the existing technology, hyperbaric oxygen equipment that can meet the above national standards is usually used in fixed hospitals. The fixed oxygen chamber structure cannot meet the emergency treatment needs of high-altitude field workers with high mobility who suddenly suffer from fatal diseases such as high-altitude pulmonary edema and cerebral edema, and cannot provide accompanying protection.

[0005] In the prior art, the patent number CN 202490133 U discloses a "hyperbaric oxygen chamber vehicle", which records the use of an off-road vehicle chassis, equipped with a hyperbaric oxygen chamber and equipment and facilities such as an air compressor, an oxygen cylinder, and a generator, which basically realizes the function of oxygen chamber mobility guarantee; however, the oxygen chamber vehicle does not have an air quality monitoring function, and the pressure can only be controlled manually, which requires high requirements for operators. During hyperbaric oxygen therapy, improper control of the pressurization rate between oxygen chambers can easily cause middle ear barotrauma, which is basically caused by the excessively fast pressurization rate in the early stage of pressurization. After the pressure exceeds 0.03MPa, the probability of middle ear barotrauma is greatly reduced, and the pressurization rate can be increased to the requirements of the treatment plan. However, most of the prior art uses manual control of pressure regulation, which cannot meet the requirements of accurate control of the pressurization rate; in addition, the hyperbaric oxygen chamber is a closed environment, and polluted gases such as carbon dioxide, carbon monoxide, ammonia, and hydrogen sulfide will be generated during the treatment process. It is necessary to monitor the internal polluted gases, control the intake and exhaust equipment at the same time, and update the air in the cabin in a timely manner.

[0006] In the prior art, in order to adapt to the outdoor environment, the hyperbaric oxygen chamber vehicle usually adopts an off-road chassis, and the oxygen chamber body is relatively high, which makes it inconvenient for the injured and the wounded with stretchers to get on and off the vehicle; and according to national standards, the oxygen chamber vehicle should be equipped with water fire-fighting equipment; however, under low temperature conditions in the wild, the fire-fighting water in the fire-fighting water tank will freeze and solidify, and the oxygen chamber vehicle in the prior art usually does not have a fire-fighting ice-melting device, and cannot complete fire-fighting operations in emergency situations.

[0007] In view of the problems existing in the above-mentioned prior art, there is an urgent need for a plateau hyperbaric oxygen chamber vehicle that can achieve: strong adaptability to plateau environments, that is, excellent off-road performance, maneuverability, and low-temperature adaptability, while being able to reduce the burden and requirements on operators by scientifically controlling pressure, reducing the probability of middle ear barotrauma for the rescued persons during treatment, and further improving the efficiency of treatment for diseases such as high-altitude pulmonary edema or cerebral edema; being able to improve the effectiveness of fire-fighting systems in extremely low temperature environments; and being able to automatically or manually regulate the air quality in the oxygen chamber according to real-time data; and being able to reduce the workload of staff in plateau environments when using stretchers to carry the wounded on and off the vehicle. Summary of the invention

[0008] The present invention provides a plateau hyperbaric oxygen chamber vehicle based on automatic pressure control, which is equipped with a cabin, a control system, a fire-fighting system, an oxygen supply system, a chassis and a stretcher lifting device; the hyperbaric oxygen chamber vehicle can have strong adaptability to plateau environments, that is, excellent off-road performance and maneuverability, fire-fighting and self-rescue capabilities, and the function of reducing the burden on personnel; the temperature and air quality in the oxygen chamber can be controlled manually and automatically; it has an ice-melting function; and it has the ability to use fuzzy PID control to regulate the pressure and the rate of change of pressure increase and decrease in the oxygen chamber, thereby reducing the probability of middle ear barotrauma for the person being treated during the treatment process, and using the hyperbaric oxygen environment in the cabin to achieve the function of treating diseases such as high-altitude pulmonary edema or cerebral edema. The specific contents are as follows:

[0009] A high-altitude hyperbaric oxygen chamber vehicle based on automatic pressure control, comprising a cabin, a control system, a fire-fighting system, an oxygen supply system, a chassis and a stretcher lifting device;

[0010] The interior of the shelter is divided into an equipment room, an operation room and an oxygen chamber room by partitions from front to back;

[0011] The control system includes a PLC module, an environment monitoring unit, an environment regulating unit, a pressure supply unit and a pressure regulating unit;

[0012] The PLC module is arranged in the operating room, electrically connected to the environment monitoring unit, the environment regulating unit and the pressure regulating unit, and is used to receive the signal transmitted by the environment monitoring unit and send control instructions to the environment regulating unit and the pressure regulating unit;

[0013] The environmental monitoring unit is arranged in the oxygen chamber and is used to collect data on pressure, temperature and air quality in the oxygen chamber in real time;

[0014] The environmental conditioning unit is arranged outside the shelter, in the equipment room, the operation room and the oxygen cabin room, and is used to improve the air quality in the oxygen cabin room;

[0015] The pressure supply unit is arranged in the equipment room and is used to provide high-pressure air to the oxygen chamber;

[0016] The pressure regulating unit is arranged in the oxygen chamber and connected to the pressure supply unit through a pressure pipeline; the pressure regulating unit is used to manually or automatically control the internal pressure of the oxygen chamber and the pressure increase and decrease rate of the oxygen chamber, and control the internal pressure of the oxygen chamber to be no more than 0.2MPa; the pressure increase rate of the oxygen chamber from normal pressure to 0.03MPa can also be controlled within 0.004MPa / min through automatic control and regulation, thereby reducing the incidence of middle ear barotrauma;

[0017] The fire fighting system is arranged in the equipment room and is used for emergency fire fighting in case of sudden fire in the oxygen chamber;

[0018] The fire-fighting system is provided with an ice-melting device inside; the ice-melting device is used to collect the temperature of the fire-fighting water, and to prevent the fire-fighting water from freezing or to melt the ice of the fire-fighting water when the ambient temperature is not lower than -41°C;

[0019] The oxygen supply system includes an oxygen source, an automatic oxygen filling and supplying device, and an oxygen suction and exhausting device;

[0020] The oxygen source is arranged in the operating room and connected to the automatic oxygen filling and supply device through an oxygen pipeline; the oxygen source is used to store and release oxygen;

[0021] The automatic oxygen filling and supply device is arranged in the operating room and connected to the oxygen suction and exhaust device through an oxygen pipeline; the automatic oxygen filling and supply device is used to automatically control the oxygen release of the oxygen source and automatically replenish oxygen for the oxygen source;

[0022] The oxygen inhalation and exhaust unit is arranged in the oxygen chamber, and is used to provide oxygen required by the wounded and sick in the oxygen chamber, and exhaust the waste gas exhaled and the uninhaled oxygen of the wounded and sick to the outside;

[0023] The chassis comprises a frame and a first drive axle, a second drive axle, a third drive axle and a fourth drive axle fixed below the frame; the frame is used to carry the cabin; a buffer device with a double wishbone independent suspension and a torsion bar spring structure is used between the first drive axle and the frame; a buffer device with a double wishbone independent suspension and a variable stiffness coil spring structure is used between the second drive axle, the third drive axle and the fourth drive axle and the frame;

[0024] The stretcher lifting device is arranged outside the rear end of the cabin and is used to provide assistance for lifting the stretcher.

[0025] Furthermore, the oxygen chamber is a rectangular pressure vessel structure, the four edges in the length direction are all in arc-shaped chamfered shapes, and are made of Q345R hot-rolled steel plate material.

[0026] The inner surface of the oxygen chamber is provided with crisscross reinforcing ribs;

[0027] The reinforcing ribs are of unequal thickness groove-shaped structures, and the bottom plate thickness is greater than the side plate thickness.

[0028] Further, the pressure supply unit includes an air compressor, a buffer tank and an air storage tank;

[0029] The air compressor is arranged at one side of the equipment room, fixedly mounted on the bottom plate of the shelter, and connected to the buffer tank via a pressure pipeline;

[0030] The buffer tank is arranged at the other side of the equipment room and fixedly mounted on the bottom plate of the shelter, and connected to the gas storage tank through a pressure pipeline;

[0031] The gas storage tank is arranged on one side of the buffer tank, fixedly mounted on the bottom plate of the cabin, and connected to the pressure regulating unit through a pressure pipeline.

[0032] Furthermore, the pressure regulating unit adopts an integrated panel structure, including a pressure regulating valve, a pressure reducing valve, an emergency pressure relief valve and a safety valve installed on the integrated panel;

[0033] The pressure regulating valve is connected to the gas storage tank through a pressure pipeline, and is used to supply gas and increase pressure to the oxygen chamber according to a set pressure value and a pressurization rate;

[0034] The pressure reducing valve is connected to the outside through a pressure pipeline, and is used to discharge the air inside the oxygen chamber to the outside at a set pressure reducing rate;

[0035] The emergency pressure relief valve is connected to the outside world through a pressure pipeline, and is used to quickly discharge the air in the oxygen chamber to the outside world in an emergency;

[0036] The safety valve is connected to the outside through a pressure pipeline and is used to limit the internal pressure of the oxygen chamber to below 0.2MPa.

[0037] Further, the environmental conditioning unit includes an air conditioner, an air filter and an air intake and exhaust device, all of which are electrically connected to the PLC module; the air conditioner includes an indoor unit, an outdoor unit and a fuel heater;

[0038] The outdoor unit is arranged outside the upper end of the front part of the cabin; the indoor unit is arranged in the oxygen chamber and connected to the outdoor unit through an air conditioning pipeline;

[0039] The fuel heater is installed inside the outdoor unit and is used for auxiliary heating of the air conditioner;

[0040] The air filter is installed in the pressure pipeline between the air storage tank and the pressure regulating unit, and is used to purify the compressed air delivered to the oxygen chamber;

[0041] The air intake and exhaust equipment are respectively arranged on the top walls of the equipment room and the operation room, and are used to replace air for the equipment room and the operation room.

[0042] Furthermore, the environmental monitoring unit includes a temperature sensor, an air pressure sensor, an oxygen concentration sensor, a carbon dioxide sensor, a carbon monoxide sensor, an ammonia sensor and a hydrogen sulfide sensor which are arranged in the oxygen chamber and electrically connected to the PLC module.

[0043] Further, the PLC module is electrically connected to the pressure regulating valve, pressure reducing valve, emergency pressure relief valve and safety valve, and automatically controls the pressure regulating valve, pressure reducing valve, emergency pressure relief valve, safety valve, air conditioning and air intake and exhaust equipment according to the information collected by the temperature sensor, air pressure sensor, oxygen concentration sensor, carbon dioxide sensor, carbon monoxide sensor, ammonia sensor and hydrogen sulfide sensor, so as to adjust the temperature, air pressure and air quality in the oxygen cabin;

[0044] The PLC module is provided with a touch screen, and the pressure regulating valve, pressure reducing valve, emergency pressure relief valve, safety valve, air conditioner and air intake and exhaust equipment can all be manually operated and controlled through the touch screen.

[0045] Further, the PLC module obtains a pressure target value, calculates a current pressure value in the oxygen chamber using a pressure estimation model, processes the pressure target value and the current pressure value in the oxygen chamber using a pressure control model, obtains a valve opening value of the pressure regulating valve, and controls the pressure regulating valve using the valve opening value of the pressure regulating valve;

[0046] The calculation expression of the pressure estimation model is:

[0047]

[0048] Among them, m t is the gas mass in the oxygen chamber at time t, the flow rate at the inlet end of the pressure regulating valve is q1, the flow rate at the exhaust end of the pressure regulating valve is q2, and ρ is the density of standard dry air, which is 1.29 kg / m 3 , P0 is the current pressure value, which is measured by the pressure sensor, R0 is the gas constant, V is the internal volume of the oxygen chamber, T is the temperature constant, which is 293K, R t is the corrected gas constant at time t.

[0049] Furthermore, the pressure control model is used to calculate the pressure target value and the current pressure value in the oxygen chamber to obtain the pressure error value E and the error conversion rate value EC, and use the process control method to process the pressure error value E and the error conversion rate value EC to obtain control variables ΔKP, ΔKI, ΔKD, and use the control variables to determine the valve opening value of the pressure regulating valve.

[0050] Furthermore, the fire fighting system includes a water injection pump, a fire fighting water tank, a booster pump and a fire fighting sprinkler;

[0051] The water injection pump is arranged on one side of the equipment room close to the air compressor and connected to the fire water tank through a fire pipeline; the water injection pump is used to fill the fire water tank with water;

[0052] The fire water tank is arranged at the rear side of the buffer tank in the equipment room and is connected to the booster pump through a fire pipeline; the fire water tank is used to store fire water;

[0053] The booster pump is arranged at the upper end of the front wall of the equipment room and connected to the fire sprinkler through a fire pipeline; the booster pump is used to pump fire-fighting water from the fire water tank and pressurize the fire-fighting water;

[0054] The fire sprinkler is arranged at the upper end of the front wall of the oxygen chamber and is used to spray fire-fighting water into the oxygen chamber in case of a sudden fire.

[0055] Furthermore, the ice melting device includes an ice melting electric heater and a temperature sensor placed inside the fire water tank, and an ice melting power switch arranged outside the fire water tank;

[0056] The ice-melting power switch and the temperature sensor are both electrically connected to the PLC module.

[0057] Further, the oxygen source includes at least 2 oxygen cylinders;

[0058] The oxygen cylinder is connected to the automatic oxygen filling and supply device through an oxygen pipeline;

[0059] The oxygen inhalation and exhaust unit includes at least two sets of oxygen inhalation masks; the oxygen inhalation masks are connected to the automatic oxygen filling and supply device through oxygen pipelines; the oxygen inhalation masks include a first-level mask used for seriously injured patients and a second-level mask used for injured patients who can breathe independently.

[0060] Furthermore, the first drive axle, the second drive axle, the third drive axle and the fourth drive axle can all transmit driving force, and the vertical distance between the lowest point of the first drive axle, the second drive axle, the third drive axle and the fourth drive axle and the ground is ≥420mm.

[0061] Further, the stretcher lifting device includes a driving part and a transmission part;

[0062] The transmission part includes a fixed part provided with a slide groove; the fixed part is fixedly mounted on the outer side of the rear end wall of the cabin; and also includes a guide rail matched with the slide groove; the lower end of the guide rail is foldably connected to a stretcher bracket;

[0063] The output end of the driving unit is connected to the guide rail and is configured to drive the guide rail to move up and down along the slide groove.

[0064] The beneficial effects of the present invention are:

[0065] 1. The cabin of the hyperbaric oxygen chamber vehicle is configured as a structure of an equipment room, an operation room and an oxygen chamber. The oxygen chamber structure of a rectangular pressure vessel is adopted. Under the premise that the oxygen chamber does not deform enough to affect the airtightness when it is subjected to a working pressure of 0.2MPa, the available space is expanded compared with the existing pressure vessels;

[0066] 2. The hyperbaric oxygen chamber vehicle is equipped with a control system, and the pressure regulating unit is controlled by a PLC module; the pressure can be scientifically adjusted and controlled manually or automatically so that the internal pressure of the oxygen chamber is controlled within a range of no more than 0.2MPa, and the pressurization rate of the oxygen chamber from normal pressure to 0.03MPa can be controlled within 0.004MPa / min by automatic control and adjustment, thereby reducing the burden and requirements on the operator, and reducing the probability of middle ear barotrauma of the person being treated during the treatment process, and can achieve the function of treating diseases such as high-altitude pulmonary edema or cerebral edema;

[0067] 3. The control system is equipped with an environmental monitoring unit and an environmental adjustment unit, which can collect the data of pressure, temperature and air quality in the oxygen chamber in real time; and the pressure, temperature and air quality of the oxygen chamber are manually or automatically controlled by the PLC module;

[0068] 4. The fire fighting system of this hyperbaric oxygen chamber vehicle can realize self-rescue in case of fire in the oxygen chamber; and the fire fighting water temperature can be collected through the ice melting device in the fire fighting system, and the fire fighting water can be prevented from freezing or ice can be melted when the ambient temperature is not lower than -41℃, thus ensuring the safety of personnel and facilities;

[0069] 5. The oxygen supply system of this hyperbaric oxygen chamber vehicle is equipped with an automatic oxygen filling and supply device, which can realize automatic control of oxygen filling and supply, eliminating the inconvenience of replacing oxygen cylinders in plateau environments;

[0070] 6. The high-altitude hyperbaric oxygen chamber vehicle based on automatic pressure control adopts a chassis with a 4-drive axle structure, which can effectively improve the off-road performance and maneuverability of the high-altitude oxygen chamber vehicle, so that the high-altitude oxygen chamber vehicle can better adapt to the plateau terrain and also has a good shock absorption and buffering function to improve the comfort of passengers, thereby improving the quality of medical care for plateau field workers;

[0071] 7. Compared with the existing technology, the stretcher lifting device of the hyperbaric oxygen chamber vehicle can effectively provide medical staff with assistance in carrying the stretcher on and off the vehicle, saving physical strength and ensuring the safety of the injured and sick. BRIEF DESCRIPTION OF THE DRAWINGS

[0072] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of 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 embodiments can be obtained based on these drawings without creative work.

[0073] Figure 1 This is a front view of the external structure of the plateau hyperbaric oxygen chamber vehicle based on automatic pressure control;

[0074] Figure 2 This is the rear view of the external structure of the plateau hyperbaric oxygen chamber vehicle based on automatic pressure control;

[0075] Figure 3 The left view of the external structure of the plateau hyperbaric oxygen chamber vehicle based on automatic pressure control;

[0076] Figure 4 The right view of the external structure of the plateau hyperbaric oxygen chamber vehicle based on automatic pressure control;

[0077] Figure 5 This is an expanded diagram of the internal structure of the plateau hyperbaric oxygen chamber vehicle based on automatic pressure control;

[0078] Figure 6 This is the right view of the internal structure of the high-altitude hyperbaric oxygen chamber vehicle operating room based on automatic pressure control;

[0079] Figure 7 This is the left view of the internal structure of the high-altitude hyperbaric oxygen chamber vehicle operating room based on automatic pressure control;

[0080] Figure 8 It is the right view of the internal structure of the oxygen chamber of the plateau hyperbaric oxygen chamber vehicle based on automatic pressure control;

[0081] Fig. 9 This is the external structure diagram of the oxygen chamber of the plateau hyperbaric oxygen chamber vehicle based on automatic pressure control;

[0082] Fig.10 This is the structural diagram of the stretcher lifting device for the plateau hyperbaric oxygen chamber vehicle based on automatic pressure control;

[0083] Fig.11 This is the schematic diagram of the ice melting device for the plateau hyperbaric oxygen chamber vehicle based on automatic pressure control;

[0084] Fig.12 This is the principle diagram of the air conditioning of the plateau hyperbaric oxygen chamber vehicle based on automatic pressure control;

[0085] Fig.13 This is a connection diagram of the automatic oxygen filling and supply device of the plateau hyperbaric oxygen chamber vehicle based on automatic pressure control;

[0086] Fig.14It is a schematic diagram of the oxygen supply path between oxygen chambers of the automatic oxygen filling and supply device of the plateau hyperbaric oxygen chamber vehicle based on automatic pressure control;

[0087] Fig.15 It is a schematic diagram of the oxygen supply path of the external oxygen source of the automatic oxygen filling and supply device of the plateau hyperbaric oxygen chamber vehicle based on automatic pressure control;

[0088] Fig.16 This is a schematic diagram of the oxygen filling path of the automatic oxygen filling and supply device of the plateau hyperbaric oxygen chamber vehicle based on automatic pressure control.

[0089] In the figure: 1. chassis; 101. frame; 102. first drive axle; 103. second drive axle; 104. third drive axle; 105. fourth drive axle; 106. leveling legs; 2. shelter; 201. equipment room; 202. operation room; 203. oxygen chamber; 204. heat dissipation outlet; 205. air inlet; 206. power outlet; 207. operation room entrance and exit door; 208. exhaust outlet; 209. oxygen chamber maintenance port; 210. equipment 1. Maintenance door of oxygen compartment; 211. Water filling port; 212. Exhaust port; 213. Oxygen filling and supply interface; 214. Maintenance door of oxygen compartment; 215. Oxygen compartment entrance and exit door; 216. Reinforcement rib; 3. Pressure regulating system; 301. Pressure supply unit; 3011. Air compressor; 3012. Buffer tank; 3013. Air storage tank; 3014. Wire rope shock absorber; 302. Pressure regulating unit; 3021. Pressure regulating valve; 3022. Pressure reducing valve; 3023. Emergency pressure relief valve; 3024. Safety valve; 4. Fire protection system; 401. Water injection pump; 402. Fire water tank; 403. Booster pump; 404. Fire sprinkler; 405. Ice melting electric heater; 406. Ice melting power switch; 407. Temperature sensor; 408. Valve; 5. Oxygen supply system; 501. Oxygen source; 502. Automatic oxygen filling and supply device; 503. Oxygen suction and exhaust device; 6. Stretcher lifting device; 601. Fixing 602. Guide rails; 603. Stretcher support; 604. Stretcher lifting device power unit box; 7. Environmental control system; 701. Indoor unit; 702. Outdoor unit; 703. Fuel heater; 704. Intake and exhaust equipment; 705. Top-mounted air conditioner; 706. Scroll compressor; 707. Condenser; 708. Axial fan; 709. Plate heat exchanger; 710. Solution tank; 8. PLC module; 9. Touch screen; 10. Distribution cabinet. DETAILED DESCRIPTION

[0090] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0091] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0092] It should be noted that when an element is referred to as being "fixed to", "placed on", "disposed with", "provided with", "set to", "arranged to" or "connected to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0093] It should be noted that, unless otherwise clearly 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 or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0094] Please refer to Figures 1 to 16 The specific structure and principle of the present invention can be better understood. A high-altitude hyperbaric oxygen chamber vehicle based on automatic pressure control, such as Figure 1 , Figure 2 As shown, it includes a shelter 2, a control system, a fire fighting system 4, an oxygen supply system 5, a chassis 1 and a stretcher lifting device 6;

[0095] The interior of the shelter 2 is divided into an equipment room 201, an operation room 202 and an oxygen chamber room 203 by partitions in order from front to back;

[0096] like Figure 5 , Figure 7 As shown, the control system includes a PLC (Programmable Logic Controller acronym, the full name in Chinese is Programmable Logic Controller) module 8, an environment monitoring unit, an environment regulating unit, a pressure supply unit 301 and a pressure regulating unit 302;

[0097] The PLC module 8 is arranged in the operating room 202, and is electrically connected to the environment monitoring unit, the environment regulating unit and the pressure regulating unit 302, and is used to receive the signal transmitted by the environment monitoring unit and send control instructions to the environment regulating unit and the pressure regulating unit 302;

[0098] The environmental monitoring unit is arranged in the oxygen chamber 203 and is used to collect data on pressure, temperature and air quality in the oxygen chamber 203 in real time;

[0099] The environmental conditioning unit is arranged outside the shelter 2, the equipment room 201, the operation room 202 and the oxygen cabin room 203, and is used to improve the air quality in the oxygen cabin room 203;

[0100] The pressure supply unit 301 is arranged in the equipment room 201 and is used to provide high-pressure air to the oxygen chamber 203;

[0101] The pressure regulating unit 302 is arranged in the oxygen chamber 203 and connected to the pressure supply unit 301 through a pressure pipeline; the pressure regulating unit 302 is used to manually or automatically control the PLC module 8 to adjust the internal pressure and the pressure increase and decrease rate of the oxygen chamber 203, and control the internal pressure of the oxygen chamber 203 to be no more than 0.2MPa; the pressure increase rate of the oxygen chamber 203 from normal pressure to 0.03MPa can also be controlled within 0.004MPa / min through automatic control and adjustment, thereby reducing the incidence of middle ear barotrauma;

[0102] The fire fighting system 4 is arranged in the equipment room 201 and is used for emergency fire fighting in case of a sudden fire in the oxygen chamber 203;

[0103] The fire fighting system 4 is provided with an ice melting device inside; the ice melting device is used to collect the temperature of the fire fighting water, and to prevent the fire fighting water from freezing or to melt the ice of the fire fighting water when the ambient temperature is not lower than -41°C;

[0104] The oxygen supply system 5 includes an oxygen source 501, an automatic oxygen filling and supply device 502, and an oxygen suction and exhaust device 503;

[0105] The oxygen source 501 is arranged in the operating room 202 and connected to the automatic oxygen supply device 502 through an oxygen pipeline; the oxygen source 501 is used to store and release oxygen;

[0106] The automatic oxygen filling and supply device 502 is arranged in the operating room 202 and connected to the oxygen suction and exhaust device 503 through an oxygen pipeline; the automatic oxygen filling and supply device 502 is used to automatically control the oxygen release of the oxygen source 501 and automatically replenish oxygen for the oxygen source 501;

[0107] The oxygen inhalation and exhaust unit is arranged in the oxygen chamber 203, and is used to provide oxygen required by the wounded and sick in the oxygen chamber 203, and exhaust the waste gas exhaled and the uninhaled oxygen of the wounded and sick to the outside;

[0108] The chassis 1 includes a frame 101 and a first drive axle 102, a second drive axle 103, a third drive axle 104 and a fourth drive axle 105 fixed below the frame 101; the frame 101 is used to carry the cabin 2; a double wishbone independent suspension and a buffer device with a torsion bar spring structure are used between the first drive axle 102 and the frame 101; a double wishbone independent suspension and a buffer device with a variable stiffness coil spring structure are used between the second drive axle 103, the third drive axle 104 and the fourth drive axle 105 and the frame 101;

[0109] The stretcher lifting device 6 is arranged outside the rear end of the cabin 2 to provide assistance for stretcher lifting.

[0110] It should be noted that the chassis 1 of the hyperbaric oxygen chamber vehicle adopts an off-road chassis 1, which can meet the requirements of vehicle-mounted, high maneuverability, and high off-road performance. The existing off-road vehicle chassis 1 is preferred. As long as it can meet the plateau geographical environment, there is no restriction here. At the same time, it is equipped with a self-generating system, which uses diesel as fuel and has the function of self-sustaining power generation.

[0111] It should be noted that the double wishbone independent suspension is an existing technology that can make the contact area between the car tires and the ground larger, so the stability of the car is better when driving at high speeds; and because the upper and lower rocker arms of the double wishbone independent suspension are of different lengths, the camber angle of the wheel can be automatically changed when the wheel moves up and down, reducing the change in wheel width and reducing tire wear;

[0112] Double wishbone independent suspension refers to a suspension system with two wishbones; this type of suspension has no lateral load, which helps to lower the height of the front of the vehicle; and because this type of suspension allows the car tires to contact a larger area of ​​the ground, it further improves the stability of the car during driving.

[0113] It should be noted that the scientific control of the pressure supply unit 301 and the pressure regulating unit 302 by other components in the control system together with the PLC module 8 can control the pressure in the oxygen chamber 203 within 0.2MPa. Under this pressure environment, diseases such as high-altitude pulmonary edema or cerebral edema can be effectively treated, and timely treatment can avoid the development of serious life-threatening diseases. Scientific pressure control by the PLC module 8 can reduce the burden and requirements on the operators, and reduce the probability of middle ear barotrauma for the rescued persons during the treatment process.

[0114] It should be noted that one side wall of the shelter 2 is provided with a heat dissipation port 204 for dissipating heat for the air compressor 3011 in the equipment room 201; an air inlet 205 for air intake of the air compressor 3011; a power port 206 for connecting to an external power supply; an operation room access door 207 for personnel to enter and exit the operation room 202; an exhaust port 208 for emergency exhaust of the oxygen chamber 203; an oxygen chamber maintenance port 209 for repairing the internal equipment of the oxygen chamber 203 from the outside; and an equipment room maintenance door 210 on the other side wall of the shelter 2 is provided with a maintenance door 211 for the equipment room 201. 0, for maintenance personnel to enter and exit the equipment room 201 for maintenance; water inlet 211, for connecting the fire water tank 402 to an external water source; exhaust port 212, for exhausting the internal air of the operation room 202; oxygen filling and supply interface 213, for an external oxygen source to oxygenate the oxygen source 501 in the cabin 2 through the oxygen filling and supply interface 213 and the automatic oxygen filling and supply device 502; oxygen compartment maintenance door 214, for maintenance personnel to enter and exit the oxygen compartment 203 for maintenance; the rear end wall of the cabin 2 is provided with an oxygen compartment access door 215 for the wounded and sick to enter and exit, such as Figure 4 shown.

[0115] In a specific implementation, the cabin 2 of the hyperbaric oxygen chamber vehicle is configured as a structure of an equipment room 201, an operation room 202 and an oxygen chamber room 203. Compared with the prior art, the structure of the oxygen chamber room 203 is optimized and the transition chamber is omitted, thereby making the overall hyperbaric oxygen chamber vehicle structure simpler and expanding the utilization space; the hyperbaric oxygen chamber vehicle is provided with a control system, and the pressure regulating unit 302 is controlled by the PLC module 8; the pressure can be scientifically adjusted and controlled manually or automatically so that the internal pressure of the oxygen chamber room 203 is controlled within a range of no more than 0.2MPa, thereby reducing the burden and requirements on the operator, and reducing the probability of middle ear barotrauma for the treated person during the treatment process, and can achieve the function of treating diseases such as high-altitude pulmonary edema or cerebral edema; the control system is provided with an environmental monitoring unit and an environmental regulating unit, which can realize real-time collection of the pressure, temperature and air quality data in the oxygen chamber room 203; and the pressure, temperature and air quality of the oxygen chamber room 203 are manually or automatically controlled by the PLC module 8; The fire fighting system 4 of the oxygen chamber vehicle can realize self-rescue in the fire of the oxygen chamber room 203; and the ice melting device in the fire fighting system 4 can collect the temperature of the fire fighting water, and prevent the fire fighting water from freezing or melt the ice for the fire fighting water when the ambient temperature is not lower than -41°C, thereby ensuring the safety of personnel and facilities; the oxygen supply system 5 of the hyperbaric oxygen chamber vehicle is provided with an automatic oxygen filling and supply device 502, which can realize automatic control of oxygen filling and supply, eliminating the inconvenience of replacing oxygen cylinders in the plateau environment; the plateau hyperbaric oxygen chamber vehicle based on automatic pressure control adopts a chassis 1 with a 4-drive axle structure, which can effectively improve the off-road performance and maneuverability of the hyperbaric oxygen chamber vehicle, so that the hyperbaric oxygen chamber vehicle can better adapt to the plateau terrain while also having better shock absorption and buffering functions to improve the comfort of passengers, thereby improving the quality of medical care for plateau field workers; the stretcher lifting device 6 of the hyperbaric oxygen chamber vehicle can effectively provide medical staff with assistance in carrying stretchers on and off the vehicle compared with the prior art, saving personnel physical strength and ensuring the safety of the wounded and sick.

[0116] According to the embodiment provided by the present invention, Fig. 9 As shown, the oxygen chamber 203 is a rectangular pressure vessel structure, and the four edges in the length direction are all arc-shaped chamfered shapes, and are made of Q345R hot-rolled steel plate material.

[0117] The inner surface of the oxygen chamber 203 is provided with crisscross reinforcing ribs 216;

[0118] The reinforcing ribs 216 are of unequal thickness groove-shaped structures, and the bottom plate thickness is greater than the side plate thickness.

[0119] It should be noted that in the prior art, the oxygen cabin 203 usually adopts a cylindrical structure. This type of cabin has the best force distribution and the smallest stress concentration. It has a simple structure, a light weight (cabin is about 2.1 tons), and is less difficult to process. However, under the same installation space conditions, its cabin volume is much smaller than the rectangular oxygen cabin 203. The per capita cabin volume of the cylindrical cabin is only 2.1m 3 The space utilization rate is only 58%, and the maximum height of the aisle in the cabin is less than 1.5m. The cabin door design is also difficult. The bottom of the cabin is about 0.2m higher than the rectangular oxygen cabin 203. It is difficult for the wounded and sick to enter and exit the oxygen cabin 203, and the comfort is poor. Therefore, for the high-altitude hyperbaric oxygen cabin vehicle based on automatic pressure control, which has extremely high space requirements, the barrel-structured oxygen cabin 203 is not applicable; therefore, the present invention preferably adopts a rectangular oxygen cabin 203.

[0120] It should be noted that, through finite element analysis of the oxygen cabin 203 structure, the present invention found that a cabin body that simply adopts a rectangular structure will produce extreme stresses at the four edges in the length direction of the cabin body, and after the four edges in the length direction of the oxygen cabin 203 test model are changed to circular chamfers, the stress value is significantly reduced; therefore, the present invention preferably adopts a rectangular cabin body with circular chamfers.

[0121] It should be noted that, through the finite element analysis of the oxygen chamber 203 using Q235R, Q245R and Q345R hot-rolled steel plate materials respectively, the present invention found that the maximum deformation and maximum stress value of the oxygen chamber 203 using Q345R hot-rolled steel plate are smaller than those of the other two materials; therefore, Q345R hot-rolled steel plate material is preferably used, and the plate thickness is preferably 8 mm, which can meet the pressure-bearing requirements while keeping the total mass within the weight limit.

[0122] It should be noted that the implementation of the above structure can ensure that when there is a pressure of 0.22MPa inside the pressure cabin, the pressure cabin will not undergo deformation sufficient to affect the airtightness of the pressure cabin; the present invention conducted finite element analysis on the structural strength of the oxygen cabin 203 using internally laid reinforcing ribs 216 and externally laid reinforcing ribs 216, and found that under the premise of the same material and the same wall thickness, the maximum deformation and maximum stress value of the structure with the reinforcing ribs 216 laid inside the cabin are both smaller than those of the structure with the reinforcing ribs 216 laid externally; therefore, the present invention preferably adopts the structure with internally laid reinforcing ribs 216, and fixes the reinforcing ribs 216 to the inner surface of the oxygen cabin 203 by welding.

[0123] It should be noted that, in practice, it is found that the force borne by the bottom plate portion of the reinforcing rib 216 is greater than the force borne by the side plate portion. Therefore, in application, it is preferred to adopt a reinforcing rib 216 structure with a bottom plate thickness of 16 mm and a side plate thickness of 8 mm. Through finite element testing, it is found that the oxygen cabin 203 is laid with reinforcing ribs 216 of this thickness and structure, and its maximum deformation and maximum stress values ​​are both outstanding.

[0124] The deformation and stress value data of the oxygen chamber 203 simulated by finite element method of the present invention are shown in the following table:

[0125]

[0126] In the specific implementation, the oxygen chamber 203 adopts a rectangular shape with arc-shaped chamfered edges. The overall plate material is 8mm thick Q345R hot-rolled steel plate, and the inner surface is paved with groove-shaped structural reinforcement ribs 216 of varying thickness. This allows the plateau hyperbaric oxygen chamber vehicle based on automatic pressure control to achieve a larger volume space and a lighter overall mass while having a better pressure-bearing capacity.

[0127] In one embodiment, if Figure 5 As shown, the pressure supply unit 301 includes an air compressor 3011, a buffer tank 3012 and an air storage tank 3013;

[0128] The air compressor 3011 is arranged at one side of the equipment room 201 and fixedly mounted on the bottom plate of the shelter 2, and connected to the buffer tank 3012 via a pressure pipeline;

[0129] The buffer tank 3012 is arranged at the other side of the equipment room 201 and fixedly mounted on the bottom plate of the shelter 2, and connected to the gas storage tank 3013 via a pressure pipeline;

[0130] The gas storage tank 3013 is arranged on one side of the buffer tank 3012 and fixedly mounted on the bottom plate of the cabin 2 and connected to the pressure regulating unit 302 via a pressure pipeline.

[0131] It should be noted that the air compressor 3011 is a prior art, and is arranged on one side of the front wall of the equipment room 201, preferably fixed to the bottom plate of the shelter 2 by screws or a bracket structure, and connected to the bottom plate of the shelter 2 by a wire rope shock absorber 3014 to reduce the vibration of the equipment;

[0132] The air compressor 3011 preferably adopts an oil-free air compressor 3011, which can reduce the pollution of hydrocarbons and oil mist in the compressed air.

[0133] It should be noted that the buffer tank 3012 is fixedly installed on the other side of the front wall of the equipment room 201, and is preferably fixedly installed with a bracket structure and the bottom plate of the cabin 2; the buffer tank 3012 is a prior art, and there are two types: diaphragm type and airbag type. The present invention preferably uses an airbag type buffer tank 3012; the buffer tank 3012 mainly achieves a buffering effect by compressing the compressed air in the tank, and is used in various reciprocating motion systems to buffer the pressure fluctuations of the system, which can make the system work more smoothly.

[0134] It should be noted that the air storage tank 3013 is arranged on one side of the buffer tank 3012, and is preferably fixed to the bottom plate of the cabin 2 through a bracket structure, and is used to store the high-pressure air generated by the air compressor 3011 and supply air to the oxygen cabin 203.

[0135] In a specific implementation, the air compressor 3011, the buffer tank 3012 and the air storage tank 3013 can provide clean high-pressure air for the oxygen chamber 203, and the operation is stable, smooth and without impact, providing strong support for the high-pressure oxygen chamber vehicle to smoothly provide personnel protection.

[0136] According to the embodiment provided by the present invention, Figure 8 As shown, the pressure regulating unit 302 adopts an integrated panel structure, including a pressure regulating valve 3021, a pressure reducing valve 3022, an emergency pressure relief valve 3023 and a safety valve 3024 installed on the integrated panel;

[0137] The pressure regulating valve 3021 is connected to the gas storage tank 3013 through a pressure pipeline, and is used to supply gas and increase pressure to the oxygen chamber 203 according to a set pressure value and a pressurization rate;

[0138] The pressure reducing valve 3022 is connected to the outside through a pressure pipeline, and is used to discharge the air inside the oxygen chamber 203 to the outside at a set pressure reducing rate;

[0139] The emergency pressure relief valve 3023 is connected to the outside through a pressure pipeline, and is used to quickly discharge the air in the oxygen chamber 203 to the outside in an emergency;

[0140] The safety valve 3024 is connected to the outside through a pressure pipeline, and is used to limit the internal pressure of the oxygen chamber 203 to below 0.2 MPa.

[0141] It should be noted that the pressure regulating unit 302 includes a pressure regulating valve 3021, a pressure reducing valve 3022, an emergency pressure relief valve 3023 and a safety valve 3024, which are all existing valve components in the prior art and can meet the requirements of this application. It is preferred to integrate the above-mentioned valve components into a panel and arrange them on the front wall of the oxygen chamber 203.

[0142] It should be noted that the main function of the pressure regulating system 3 is to meet the requirements of pressurization, pressure stabilization, ventilation, and decompression (including emergency decompression) of the hyperbaric oxygen chamber vehicle. Combined with the overall installation space, power source, off-road performance and other factors of the oxygen chamber room 203 and the equipment room 201, the high-pressure air generated by the air compressor 3011 is sent into the oxygen chamber room 203 after being filtered and dried; during the pressurization process, the air compressor 3011 starts to work, and the compressed air enters the air storage tank 3013 after buffering treatment. When the set pressure is reached, the air compressor 3011 stops working. After the compressed air is dried and filtered, it is pressurized in the cabin according to the set pressurization rate through the valve opening of the pressure regulating valve 3021. When the pressure of the air storage tank 3013 is lower than 0.6MP At a, the air compressor 3011 is started to maintain the pressure of the air storage tank 3013; during the decompression process, the pressure reducing valve 3022 is opened and adjusted to reduce pressure at the set decompression rate, and the gas in the oxygen chamber 203 is discharged out of the chamber through the pressure pipeline to complete the decompression process; the emergency pressure relief valve 3023 of the pressure regulating unit 302 is preferably a mechanical quick-opening emergency pressure relief valve 3023, which can be opened both inside and outside the chamber in an emergency. After opening, the pressure in the oxygen chamber 203 drops from 0.2MPa to 0.1MPa in no more than 5 minutes; the safety valve 3024 is preferably equipped with two safety valves 3024. When the pressure in the oxygen chamber 203 reaches the set value (0.2MPa), the safety valve 3024 automatically opens to exhaust gas to the outside.

[0143] It should be noted that the internal pressure of the oxygen chamber 203 can be adjusted by the pressure regulating valve 3021; ​​the safety valve 3024 can limit the maximum pressure in the oxygen chamber 203. When the pressure is higher than 0.2MPa, the safety valve 3024 opens to release the pressure in the oxygen chamber 203, so that the internal pressure of the oxygen chamber 203 is always maintained below 0.2MPa.

[0144] In a specific implementation, the pressure regulating unit 302 is provided with a pressure regulating valve 3021 , a pressure reducing valve 3022 , an emergency pressure relief valve 3023 and a safety valve 3024 ; the pressure in the oxygen chamber 203 can be controlled and the pressure in the oxygen chamber 203 can be ensured to be safe and stable.

[0145] In one embodiment, if Figure 3 , Figure 5 As shown, the environmental conditioning unit includes an air conditioner, an air filter and an air intake and exhaust device 704 which are all electrically connected to the PLC module 8; the air conditioner includes an indoor unit 701, an outdoor unit 702 and a fuel heater 703;

[0146] The outdoor unit 702 is arranged outside the upper end of the front part of the cabin 2; the indoor unit 701 is arranged in the oxygen chamber 203 and connected to the outdoor unit 702 through an air conditioning pipeline;

[0147] The fuel heater 703 is installed inside the outdoor unit 702 and is used for auxiliary heating of the air conditioner;

[0148] The air filter is installed in the pressure pipeline between the gas storage tank 3013 and the pressure regulating unit 302, and is used to purify the compressed air delivered to the oxygen chamber 203;

[0149] The air intake and exhaust equipment 704 are respectively arranged on the top walls of the equipment room 201 and the operation room 202 to replace air for the equipment room 201 and the operation room 202 .

[0150] It should be noted that the outdoor unit 702 is preferably fixed to the outside of the front end wall of the cabin 2 by screws or a bracket structure; the indoor unit 701 is preferably fixed to the upper end of the front wall of the oxygen cabin 203 by screws or a bracket; the fuel heater 703 is a prior art and is integrated with the outdoor unit 702.

[0151] It should be noted that if Fig.12 As shown, the air conditioner adopts common equipment in the prior art, and is mainly composed of four parts: Freon refrigeration system, fuel heating module, circulating water system, temperature control system and control unit;

[0152] The Freon refrigeration system is integrated in the outdoor unit 702, including: a fully enclosed scroll compressor 706, a condenser 707, an axial flow fan 708, a filter, a sight glass, a thermal expansion valve, a plate heat exchanger 709, a vapor-liquid separator, a high and low pressure controller, a solution tank 710 and connecting pipes;

[0153] The fuel heating module includes: a fuel heater 703, a Y-type filter and a connecting pipeline;

[0154] The circulating water system includes: a cold water pump, a Y-type filter, a water tank, a temperature sensor 407, a flow switch, an electric three-way valve, a ball valve, a stainless steel pipe and a connecting joint;

[0155] The temperature control system includes: a magnetic sealed motor and an indoor unit 701, wherein the indoor unit 701 includes a cross-flow fan, a fin heat sink and a temperature sensor 407;

[0156] The control unit includes: a control cabinet (integrated into the outdoor unit 702), a hand operation panel, a PCB board, a circuit breaker, a relay and a power supply cable;

[0157] The Freon refrigeration system uses the traditional and reliable Freon compression refrigeration system to produce cold water, and maintains the cabin temperature by supplying water at different flow rates;

[0158] The heating is generated by the fuel heater 703, which is connected in series in the water circuit of the solution tank 710 and is connected to the water inlet and outlet of the solution tank 710 to form an independently operated heating system; the fuel delivered to the combustion chamber of the fuel heater 703 by an independent electromagnetic oil pump is mixed with the ambient air sucked in by the combustion-supporting wind wheel, and then the mixed oil and gas are ignited by the ignition plug. The high temperature generated by the combustion is used as a heat source, and then the circulating water pump of the fuel heater 703 is used to drive the coolant in the solution tank 710 to circulate, and the coolant in the solution tank 710 is heated. The cold water pump drives the hot coolant in the solution water tank to the plate heat exchanger 709 of the indoor unit 701. The evaporating fan of the indoor unit 701 operates to exchange heat between the cold air in the oxygen cabin 203 and the heated coolant, and blows out hot air from the air outlet, and this is repeated to increase the temperature in the oxygen cabin 203;

[0159] The outdoor unit 702 adopts a frame structure to meet the vibration and impact requirements of off-road vehicles;

[0160] The indoor unit 701 adopts a sheet metal structure to meet the vibration and impact requirements of off-road vehicles. It is mainly composed of a magnetic seal motor (installed outside the cabin), a fan impeller, a plate heat exchanger 709, and a sheet metal support;

[0161] In order to meet the requirements of the unit heating rate under low temperature, two 4kW mobile electric heaters are added to meet the heating requirements in the oxygen chamber 203 when the ambient temperature is lower than -18℃. When the temperature in the oxygen chamber 203 rises to 15℃, the electric heating is turned off; the heating and cooling performance of the air conditioner are as follows:

[0162] In summer, the temperature drops from 35℃ to 26℃ in less than 1 hour, and the cooling load is 3834W;

[0163] In winter, the temperature rises from -40℃ to 15℃ in less than 1 hour, and the heating load is 9807W.

[0164] It should be noted that the air filter (not shown in the figure) includes a primary filter, a medium filter and a high efficiency filter; the primary filter is arranged at the air inlet 205 of the air compressor 3011; the medium filter and the high efficiency filter are arranged in the pressure pipeline between the air storage tank 3013 and the pressure regulating unit 302.

[0165] It should be noted that the air intake and exhaust equipment 704 includes an exhaust port 212 and an axial flow fan 708 ; the side walls of the equipment room 201 and the operation room 202 are both installed with the air intake and exhaust equipment 704 .

[0166] It should be noted that the hyperbaric oxygen chamber vehicle also includes a roof-mounted air conditioner 705; the roof-mounted air conditioner 705 is arranged inside the top wall of the operating room 202, and passes through the top wall of the operating room 202 to communicate with the outside world.

[0167] In a specific implementation, the environmental control system 7 can control the ambient temperature and air quality in the cabin 2, thereby providing a comfortable environment for the passengers and an operating environment for the equipment.

[0168] In one embodiment, if Figure 8 As shown, the environmental monitoring unit includes a temperature sensor 407, an air pressure sensor, an oxygen concentration sensor, a carbon dioxide sensor, a carbon monoxide sensor, an ammonia sensor, and a hydrogen sulfide sensor which are arranged in the oxygen chamber 203 and electrically connected to the PLC module 8;

[0169] The PLC module 8 is electrically connected to the pressure regulating valve 3021, the pressure reducing valve 3022, the emergency pressure relief valve 3023 and the safety valve 3024, and automatically controls the pressure regulating valve 3021, the pressure reducing valve 3022, the emergency pressure relief valve 3023, the safety valve 3024, the air conditioner and the air intake and exhaust equipment 704 according to the information collected by the temperature sensor 407, the air pressure sensor, the oxygen concentration sensor, the carbon dioxide sensor, the carbon monoxide sensor, the ammonia sensor and the hydrogen sulfide sensor, so as to adjust the temperature, air pressure and air quality in the oxygen cabin 203;

[0170] The PLC module 8 is provided with a touch screen 9 , and the pressure regulating valve 3021 , the pressure reducing valve 3022 , the emergency pressure relief valve 3023 , the safety valve 3024 , the air conditioner and the air intake and exhaust equipment 704 can all be manually operated and controlled through the touch screen 9 .

[0171] It should be noted that the PLC module 8 can also be replaced by a circuit including at least one processor, or a circuit including at least one single-chip microcomputer, or a combination of multiple circuits or chips, as long as the corresponding functions can be achieved; it is understandable that for those skilled in the art, the control circuit can also be a common circuit composed of amplifiers, comparators, transistors, MOS tubes, etc. to achieve the corresponding functions in a purely hardware manner.

[0172] It should be noted that the staff can adjust various parameters through the touch screen 9, so that the PLC module 8 controls the operation of each valve.

[0173] It should be noted that the control system automatically monitors and controls the working state of the overall system of the hyperbaric oxygen chamber vehicle, and can realize full-process automatic control of pressurization, pressure stabilization, pressure reduction and oxygen concentration of the oxygen chamber 203 according to the requirements of the treatment plan;

[0174] The PLC module 8 can make a comprehensive judgment and draw a conclusion based on the information collected by the sensor of the environmental monitoring unit, and send instructions to the air compressor 3011, the pressure regulating valve 3021, the pressure reducing valve 3022, the emergency pressure relief valve 3023, the safety valve 3024 and the air intake and exhaust device 704 according to the conclusion to control the start or shutdown; for example: when the PLC receives the information collected by the oxygen concentration sensor and judges and processes it, it is concluded that the oxygen concentration in the oxygen chamber 203 is low, the PLC sends an instruction to the air intake and exhaust device 704 to open the air intake to introduce the outside air into the oxygen chamber. 203, to increase the internal oxygen concentration; when the PLC receives the information collected by the carbon dioxide sensor, carbon monoxide sensor, ammonia sensor or hydrogen sulfide sensor and processes it, it is concluded that the content of the above-mentioned harmful gases in the oxygen chamber 203 exceeds the standard, and the PLC sends a command to the air intake and exhaust device 704 to turn on the exhaust, so that the air inside the oxygen chamber 203 can be discharged to the outside, thereby improving the internal air quality; and the operator can also issue control instructions through the control system to make the equipment operate according to the set program; the above-mentioned control methods are all implemented using conventional automatic control technologies in the prior art.

[0175] The control system has two control modes: automatic and manual:

[0176] (1) Automatic control method

[0177] According to the equipment control parameter requirements, the air compressor 3011, pressure regulating valve 3021, pressure reducing valve 3022, emergency pressure relief valve 3023, safety valve 3024 and air intake and exhaust equipment 704 on the pipeline are automatically controlled to achieve the specified test conditions;

[0178] (2) Manual control method

[0179] The operator manually controls the PLC unit through the touch screen 9 according to the test parameters, and independently starts and stops the air compressor 3011, regulating valve, solenoid valve, etc. on the pipeline to achieve the specified test conditions.

[0180] The software system of the control system is modularly designed according to the test content, and a humanized human-machine interface is produced for different test subjects, which can be operated on the touch screen 9;

[0181] The software interface adopts a hierarchical display mode. By clicking on the controllable devices on the screen, you can further understand the maintenance information of the equipment, including parameter settings, fault information, cumulative operating time, position feedback, etc., so that maintenance personnel can quickly determine and troubleshoot faults; the software interface also supports multi-window display mode. Operators can drag floating windows to place the display content that needs attention in the appropriate position of the main window, which makes the overall picture simple and clear and avoids the omission of important parameters. The software system has the following functions:

[0182] (1) It has automatic control function and can automatically run the test program according to the pre-set parameters;

[0183] (2) It has a manual control function, which can manually control the operation of each component of the equipment;

[0184] (3) It has the function of real-time data online display and post-test playback of stored data;

[0185] (4) Have control signal recording function;

[0186] (5) Have the function of monitoring the equipment operation status;

[0187] (6) Have equipment failure alarm function;

[0188] In addition, the software system sets a "password confirmation" key operation mode for important operation steps, which can effectively avoid malfunctions caused by misoperation;

[0189] In specific implementation, the touch screen 9 can provide better human-computer interaction conditions and facilitate human operation; the control system can operate in an automatic state without basic human intervention, which can greatly reduce the operator's workload; the system retains the manual operation function under abnormal conditions to cope with emergencies and ensure the safety of personnel and equipment.

[0190] According to the embodiment provided by the present invention, the PLC module 8 obtains the pressure target value, calculates the current pressure value in the oxygen chamber 203 using the pressure estimation model, processes the pressure target value and the current pressure value in the oxygen chamber 203 using the pressure control model, obtains the valve opening value of the pressure regulating valve 3021, and controls the pressure regulating valve 3021 using the valve opening value of the pressure regulating valve 3021;

[0191] The calculation expression of the pressure estimation model is:

[0192]

[0193] Among them, m t is the gas mass in the oxygen chamber 203 at time t, the flow rate at the inlet end of the pressure regulating valve 3021 is q1, the flow rate at the exhaust end of the pressure regulating valve 3021 is q2, and ρ is the density of standard dry air, which is 1.29 kg / m 3 , P0 is the current pressure value, which is measured by the pressure sensor, R0 is the gas constant, V is the internal volume of the oxygen chamber 203, T is the temperature constant, which is 293K, R t is the corrected gas constant at time t.

[0194] It should be noted that, among them, R t The calculation expression is:

[0195]

[0196] The inlet flow rate and outlet flow rate of the pressure regulating valve 3021 can also be calculated by a flow calculation model. The expression of the flow calculation model is:

[0197] Q=Q max R P ,

[0198]

[0199] Wherein, l / A represents the relative opening of the pressure regulating valve 3021, l represents the actual opening value, A represents the maximum opening value of the pressure regulating valve 3021, and R represents the adjustable range length of the pressure regulating valve 3021. Q min It is the minimum flow rate that the valve can control smoothly, P is the flow rate adjustment coefficient; Q max is the flow rate when the valve is fully open, G represents the relative density of the gas, which is 1, and F p K is the pipe geometry coefficient. Here, the pipe diameters before and after remain unchanged and are taken as 1. v The valve flow coefficient is 16; T is the temperature, which is 293K; Z is the gas compression coefficient. According to the comparison of temperature and pressure, Z at the inlet end is 0.99, and Z at the exhaust end is 1; X is the pressure difference ratio before and after. X=(P1-P2) / P1; P1 is the absolute pressure at the inlet of the pressure regulating valve 3021, and P2 is the absolute pressure at the outlet of the pressure regulating valve 3021. The absolute pressure is measured by the air pressure sensor; X T is the critical pressure ratio, which is set according to the valve characteristics of the pressure regulating valve 3021. Here, the value is 0.55. When the front and rear pressure difference ratio is greater than the critical pressure ratio, the gas generates a blocked flow in the pipeline and the flow rate reaches the maximum; F K is the adiabatic correction factor, which is taken as 1 here.

[0200] The valve opening of the pressure regulating valve 3021 refers to the degree to which the valve of the pressure regulating valve 3021 is opened or closed, that is, the volume occupied by the valve or the volume of the channel within a corresponding time through the change of its valve seat volume or channel volume.

[0201] In one embodiment, the pressure control model is used to calculate the pressure target value and the current cabin pressure value to obtain the pressure error value E and the error conversion rate value EC; set the domain of E and EC to [-3, 3], set the domain of the control variables ΔKP, ΔKI, and ΔKD to [-3, 3], [-0.6, 0.6], and [-1.5, 1.5] respectively; use the process control method to process the pressure error value E and the error conversion rate value EC to obtain the control variables ΔKP, ΔKI, and ΔKD, and use the control variables to determine the valve opening value of the pressure regulating valve 3021.

[0202] It should be noted that, in controlling the pressure regulating valve 3021 by using the valve opening value of the pressure regulating valve 3021, the pressurization rate is divided into two parts: one is before pressurization to 0.03MPa, 0.03MPa is a critical point for middle ear barotrauma, and a large amount of data shows that the occurrence of middle ear barotrauma is caused by excessively fast pressurization rate between normal pressure and 0.03MPa, and it is rare after exceeding 0.03MPa. Therefore, it is necessary to reduce the pressurization rate between normal pressure and 0.03MPa as much as possible, and take the minimum pressurization rate of 0.004MPa / min in GB / T 12130-2005 "Medical Air Compressed Oxygen Chamber". Second, after the pressure exceeds 0.03MPa, the probability of middle ear barotrauma is greatly reduced, and the pressurization rate can be increased to the requirements of the treatment plan (generally not exceeding 0.01MPa / min) until the set treatment pressure is reached. Similarly, when the blood pressure drops to 0.03MPa, the rate of blood pressure reduction should be reduced to reduce the incidence of middle ear barotrauma.

[0203] The process control method may be a fuzzy PID control method.

[0204] The fuzzy PID control method comprises:

[0205] 1. Fuzzification: The function of fuzzification is to convert the precise input quantity into fuzzy quantity. The input quantity includes external reference input, system output or state, etc. They are all precise quantities, while the fuzzy controller processes fuzzy quantities. Therefore, they must be fuzzified first.

[0206] 2. Knowledge base processing: The knowledge base contains the knowledge and control objectives required in the specific application field. It usually consists of two parts: the database and the fuzzy control rule base.

[0207] 3. Fuzzy reasoning processing: Fuzzy reasoning is the core of the fuzzy controller, which has the ability to simulate human reasoning based on fuzzy concepts. The reasoning process is based on the implication relationship and reasoning rules in fuzzy logic.

[0208] 4. Clarification processing: The function of clarification is to transform the control quantity (fuzzy quantity) obtained by fuzzy reasoning into a clear quantity actually used for control.

[0209] The fuzzy PID control algorithm is an algorithm obtained by integrating the PID controller with the fuzzy control algorithm. This control algorithm has the advantages of fast response and no overshoot. Usually, the system controller is composed of a fuzzy controller and a conventional PID controller in series, that is, the input of the PID controller is the output of the fuzzy controller, and the output of the PID controller is the output of the entire controller.

[0210] The design of the fuzzy controller of the micro-hyperbaric chamber consists of fuzzy control, clarifying the weights and law confidence, and establishing fuzzy reasoning rules. The construction of the fuzzy control algorithm requires the use of PID control principles and expert experience respectively. When there is an error in the control algorithm, the deviation of the control quantity should be removed. When the deviation is very low, it is necessary to keep the control system stable. In the control method of the micro-hyperbaric chamber pressure control system, the reasoning method is the Mamdani model. In the fuzzy PID control algorithm of the pressure control system of the micro-hyperbaric chamber, E is the error value between the actual pressure in the cabin and the target pressure, EC is the deviation change rate between the actual pressure in the cabin and the target pressure, these two are the two input variables in the micro-hyperbaric chamber control system, and the three output variables are ΔK P , ΔK I , ΔK D These three variables can be used to correct the PID adjustment parameters.

[0211] The algorithm for adjusting PID parameters of fuzzy controller is as follows:

[0212] K p =k p0 -Δk p

[0213] K i =k i0 -Δk i

[0214] K d =k d0 -Δk d

[0215] Where K P , K I , K Dare the three adjustment parameters of PID. According to the actual pressure control conditions on site, the physical domain of cabin pressure change is set to [5, 20] (kPa), the fuzzy domain of cabin pressure change is set to [-3, 3] (kPa), and the fuzzy domain of design error E and deviation change rate EC is N = {-3, -2, -1, 0, 1, 2, 3} seven fuzzy levels. Use fuzzy language to express E, EC, ΔK P , ΔK I , ΔK D The function of the input variable of the pressure control system of the micro-hyperbaric chamber is a triangular membership function.

[0216] Finally, the fuzzy PID control system also needs to be defuzzified. Common defuzzification methods include the centroid method, area average method, maximum membership method, etc. Among them, the inference output of the centroid method is smoother. When the input signal changes slightly, its output result will also change significantly, so the centroid method is used for defuzzification.

[0217] The centroid method expression formula is:

[0218]

[0219] The ΔKP indicates that the valve opening value is increased by B1; the ΔKI indicates that the valve opening value is kept unchanged; and the ΔKD indicates that the valve opening value is reduced by B2.

[0220] The valve opening value is determined by using the control variable, and the valve opening value is increased, unchanged or decreased according to the control variable to obtain an updated valve opening value.

[0221] The process control method can also be implemented by using a trained control model; the trained control model processes the input pressure error value E and the error conversion rate value EC to obtain the control variable ΔK P , ΔK I , ΔK D .

[0222] The control model includes a first processing network and a second processing network;

[0223] The first processing network includes a first input module, a first convolution module, a depth-separable convolution module, a first dimension-raising convolution module, a second dimension-raising convolution module, a third dimension-raising convolution module, a fourth dimension-raising convolution module, a second convolution module, a first pooling module, a third convolution module and a first fully connected module;

[0224] The input end of the first input module of the first processing network is used to receive the pressure error value E and the error conversion rate value EC; the output end of the first input module of the first processing network is connected to the input end of the first convolution module of the first processing network; the output end of the first convolution module of the first processing network is connected to the input end of the depthwise separable convolution module of the first processing network; the output end of the depthwise separable convolution module of the first processing network is connected to the input end of the first dimensionality-increasing convolution module of the first processing network; the output end of the first dimensionality-increasing convolution module of the first processing network is connected to the input end of the second dimensionality-increasing convolution module of the first processing network; the output end of the second dimensionality-increasing convolution module of the first processing network, The output end of the third dimensionality-raising convolution module of the first processing network is connected to the input end of the fourth dimensionality-raising convolution module of the first processing network; the output end of the fourth dimensionality-raising convolution module of the first processing network is connected to the input end of the second convolution module of the first processing network; the output end of the second convolution module of the first processing network is connected to the input end of the first pooling module of the first processing network; the output end of the first pooling module of the first processing network is connected to the input end of the third convolution module of the first processing network; the output end of the third convolution module of the first processing network is connected to the input end of the first fully connected module of the first processing network;

[0225] The second processing network includes a second input module, a fourth convolution module, a fifth convolution module, a sixth convolution module, a second pooling module, a seventh convolution module and a second fully connected module;

[0226] The input end of the second input module of the second processing network is connected to the output end of the first fully connected module of the first processing network; the output end of the second input module of the second processing network is connected to the input end of the fourth convolution module of the second processing network; the output end of the fourth convolution module of the second processing network is connected to the input end of the fifth convolution module of the second processing network; the output end of the fifth convolution module of the second processing network is connected to the input end of the sixth convolution module of the second processing network; the output end of the sixth convolution module of the second processing network is connected to the input end of the second pooling module of the second processing network; the output end of the second pooling module of the second processing network is connected to the input end of the seventh convolution module of the second processing network; the output end of the seventh convolution module of the second processing network is connected to the input end of the second fully connected module of the second processing network.

[0227] The convolution module can be implemented by using 3D multi-channel convolution;

[0228] The depthwise separable convolution module can be implemented by connecting a channel splitting submodule and a single-channel convolution submodule. Specifically, it can be implemented by using the depthwise separable convolution module in the MobileNet network.

[0229] The dimension-raising convolution module can be implemented by using the dimension-raising convolution module in the ResNet network;

[0230] The pooling module can be implemented by using a maximum pooling operation.

[0231] Specifically, when the convolution module, depthwise separable convolution module, dimensionality-increasing convolution module and pooling module are implemented by using multiple three-dimensional filters in parallel, the data characteristics of the matrices of the corresponding three-dimensional filters are different. The data characteristics of the matrices include the mean, variance, eigenvalues, etc. of the matrices.

[0232] The output end of the second fully connected module of the second processing network is used to output the control variables ΔKP, ΔKI, ΔKD.

[0233] The first convolution module, the depthwise separable convolution module, the first dimension-raising convolution module, the second dimension-raising convolution module, the third dimension-raising convolution module, the fourth dimension-raising convolution module, the second convolution module, the first pooling module and the third convolution module of the first processing network are all implemented by N parallel three-dimensional filters; the three-dimensional filters in the front and back adjacent modules in the first processing network are connected according to the sequence numbers;

[0234] The fourth convolution module, the fifth convolution module, the sixth convolution module, the second pooling module and the seventh convolution module of the second processing network are all implemented by N parallel three-dimensional filters; the three-dimensional filters in the front and back adjacent modules in the second processing network are connected according to the sequence number;

[0235] The three-dimensional filters in the front and rear adjacent modules in the first or second processing network are connected according to the serial number, specifically, the first three-dimensional filter of the previous convolution module is connected to the first three-dimensional filter of the next convolution module, the second three-dimensional filter of the previous convolution module is connected to the second three-dimensional filter of the next convolution module, the third three-dimensional filter of the previous convolution module is connected to the third three-dimensional filter of the next convolution module, and specifically, the last three-dimensional filter of the previous convolution module is connected to the last three-dimensional filter of the next convolution module.

[0236] The training process of the control network includes:

[0237] Initialize the number of training iterations;

[0238] Acquire control knowledge training set;

[0239] Using the pressure information in the control knowledge training set as input data and inputting it into the control network; Using the control information corresponding to the pressure information in the control knowledge training set as label information;

[0240] Using the control network, processing the input data to obtain prediction information;

[0241] Performing difference calculation processing on the obtained prediction information and label information to obtain a difference value;

[0242] Determine whether the difference value satisfies a convergence condition, and obtain a first determination result;

[0243] When the first judgment result is no, judging whether the training iteration number value is equal to the training number threshold, and obtaining a second judgment result;

[0244] When the second judgment result is no, determining that the model training state does not meet the training termination condition;

[0245] When the second judgment result is yes, determining that the model training state satisfies the training termination condition;

[0246] When the first judgment result is yes, determining that the model training state satisfies a training termination condition;

[0247] When the model training state does not meet the termination training condition, the control network is updated with the parameter update model, the training iteration number is increased by 1, and the entity information in the pressure information in the control knowledge training set is triggered to be input into the control network as input data;

[0248] When the model training state satisfies the training termination condition, the training process of the control network is completed to obtain a trained control network.

[0249] The parameter updating model is expressed as follows:

[0250]

[0251] θ←θ+v;

[0252] In the formula, is the difference value of the ith pressure information of the control knowledge training set, v is the parameter update value, θ is the parameter of the control network, η is the initial parameter learning rate, α is the momentum angle parameter, 0≤α≤π / 4, It means to find partial derivatives with respect to variable θ;

[0253] The difference calculation process is implemented by a loss function;

[0254] The difference value is calculated by a loss function;

[0255] The loss function may adopt a cross entropy loss function.

[0256] The control knowledge training set can be constructed using historical data of pressure control of Shelter 2;

[0257] The pressure information in the control knowledge training set includes a pressure error value E and an error conversion rate value EC; the control information corresponding to the pressure information is a control variable.

[0258] In one embodiment, the fire protection system 4 includes a water injection pump 401, a fire water tank 402, a booster pump 403 and a fire sprinkler 404;

[0259] The water injection pump 401 is arranged at one side of the equipment room 201 close to the air compressor 3011 and is connected to the fire water tank 402 through a fire pipeline; the water injection pump 401 is used to inject water into the fire water tank 402;

[0260] The fire water tank 402 is arranged at the rear side of the buffer tank 3012 in the equipment room 201 and is connected to the booster pump 403 through a fire pipeline; the fire water tank 402 is used to store fire water;

[0261] The booster pump 403 is arranged at the upper end of the front wall of the equipment room 201 and is connected to the fire sprinkler 404 through a fire pipeline; the booster pump 403 is used to pump firefighting water from the fire water tank 402 and pressurize the firefighting water;

[0262] The fire sprinkler 404 is arranged at the upper end of the front wall of the oxygen chamber 203 and is used to spray fire-fighting water to the oxygen chamber 203 in case of a sudden fire.

[0263] It should be noted that the water injection pump 401 is preferably fixed to the bottom plate of the cabin 2 in the equipment room 201 by screws or a bracket structure; the water injection pump 401 has a water inlet and a water outlet, the water inlet is connected to a water injection pipeline, the water injection pipeline extends to the other side of the equipment room 201, and can be connected to the outside of the cabin 2 through the water injection port 211; the water outlet of the water injection pump 401 is connected to the fire water tank 402 through a fire pipeline; when it is necessary to replenish the fire water tank 402 with fire water, connect the external water source to the water injection pipeline, start the water injection pump 401, and replenish the fire water tank 402 with water.

[0264] It should be noted that the fire water tank 402 is preferably fixed to the bottom plate of the shelter 2 by a bracket; the water inlet of the fire water tank 402 is connected to the water injection pump 401, and the water outlet is connected to the booster pump 403 through a fire pipeline.

[0265] It should be noted that the booster pump 403 is preferably fixed to the front wall of the equipment room 201 by screws or brackets, its water inlet is connected to the fire water tank 402 through a fire pipe, and its water outlet is connected to the fire sprinkler 404 through a fire pipe; the fire pipe between the booster pump 403 and the fire sprinkler 404 extends from the equipment room 201 to the oxygen chamber room 203.

[0266] It should be noted that the fire sprinkler 404 is preferably fixed to the upper end of the front wall of the oxygen chamber 203 by screws or brackets.

[0267] In a specific implementation, the fire fighting system 4 provided by the present invention has a water injection pump 401, a fire fighting water tank 402, a booster pump 403 and a fire fighting nozzle 404, which is fully equipped and has a reliable connection method, providing hardware guarantee for fire fighting of sudden fires.

[0268] According to the embodiment provided by the present invention, Fig.11 As shown, the ice melting device includes an ice melting electric heater 405 and a temperature sensor 407 placed inside the fire water tank 402, and an ice melting power switch 406 arranged outside the fire water tank 402; the ice melting power switch 406 and the temperature sensor 407 are both electrically connected to the PLC module 8.

[0269] It should be noted that the ice melting device includes an ice melting electric heater 405, an ice melting power switch 406 and a temperature sensor 407. The ice melting power switch 406 is the power switch of the ice melting device; the temperature sensor 407 and the ice melting electric heater 405 are placed inside the fire water tank 402, and the temperature sensor 407 is used to monitor the liquid temperature in the fire water tank 402 and is electrically connected to the PLC module 8; when the liquid temperature is lower than 10°C, the PLC module 8 gives a start signal to the ice melting electric heater 405; the ice melting electric heater 405 is an array of waterproof heating resistors, which will heat the liquid in the fire water tank 402 after starting, until it is higher than 20°C, and the ice melting electric heater 405 stops heating. Contactors and valves 408 and other components can also be added to the connection between the ice melting device and the PLC module 8 to better control the ice melting process.

[0270] In a specific implementation, an ice melting device is provided in the fire fighting system 4, which can automatically and effectively melt ice or prevent freezing, and prevent the fire fighting water from freezing and causing the inability to replenish water or spray water.

[0271] In one embodiment, if Figure 6 , Fig.13 As shown, the oxygen source 501 includes at least 2 oxygen cylinders;

[0272] The oxygen cylinder is connected to the automatic oxygen filling and supply device 502 via an oxygen pipeline;

[0273] The oxygen inhalation and exhaust unit includes at least two sets of oxygen inhalation masks; the oxygen inhalation masks are connected to the automatic oxygen filling and supply device 502 through oxygen pipelines; the oxygen inhalation masks include a first-level mask for seriously ill patients and a second-level mask for patients who can breathe independently.

[0274] It should be noted that preferably, six oxygen cylinders are combined into a group in pairs, and preferably fixed to the bottom plate of the cabin 2 by a bracket; the six oxygen cylinders can all realize automatic oxygen replenishment and oxygen supply through the automatic oxygen filling and supply device 502;

[0275] The automatic oxygen filling and supply device 502 is a prior art, and preferably adopts the RMCGY-3*3 model automatic oxygen filling and supply device produced by Tianjin Ruima Landun Technology Co., Ltd. The device consists of two parts: oxygen supply and oxygen filling. The oxygen supply part connects two groups of oxygen cylinders together to realize automatic oxygen supply; the oxygen filling part can realize automatic control of oxygen filling to the oxygen cylinders, that is, it automatically switches to another group of oxygen cylinders for oxygen filling after being full; when supplying oxygen, the automatic oxygen filling and supply device 502 first uses the oxygen in one group of oxygen cylinders, and when the oxygen in this group of cylinders is exhausted, it will automatically switch to another group of oxygen cylinders for oxygen supply, during which the exhausted oxygen cylinders can be replaced or oxygenated; when the gas in the other group of oxygen cylinders is exhausted, it will automatically switch to the state of oxygen supply of the first group of oxygen cylinders, so as to achieve the purpose of uninterrupted oxygen supply. When filling oxygen, the automatic oxygen filling and supply device 502 can fill oxygen into each oxygen cylinder through an external oxygen compressor. When one group of oxygen cylinders is full, it can automatically switch to another group of oxygen cylinders for oxygen filling, and at the same time send out an audible and visual alarm signal to prompt the staff to replace the full oxygen cylinders in time. The alarm stops after the oxygen cylinders are replaced. Figures 14 to 16 This is the oxygen supply principle of the automatic oxygen filling and supply device.

[0276] It should be noted that the oxygen mask can preferably be stored in a plastic shell for easy transportation and taking; the oxygen mask preferably adopts mask-type oxygen inhalation for both the first-level oxygen inhalation and the second-level oxygen inhalation, and is configured to meet the oxygen inhalation needs of 2 people for 5 hours; each oxygen inhalation and exhaust unit also includes a pressure reducer, a humidification bottle, pipelines, oxygen inhalation terminal and other components.

[0277] It should be noted that the oxygen mask can discharge the waste gas exhaled and uninhaled oxygen in the oxygen mask to the outside world; the oxygen mask has built-in pipes connecting to the outside world, as well as an air inlet valve and an air outlet valve; when the patient inhales, the air inlet valve opens and the air outlet valve closes, and oxygen enters the oxygen mask from the air inlet valve; when the patient exhales, the air inlet valve closes and the air outlet valve opens, and the exhaled waste gas and the excess oxygen in the oxygen mask that is not inhaled is discharged to the outside world from the air outlet valve.

[0278] In specific implementation, the automatic oxygen filling and supply device 502 can be used to automatically fill oxygen cylinders and switch oxygen cylinder groups, as well as automatically supply oxygen to personnel and switch oxygen cylinder groups, thereby solving the inconvenience of replacing oxygen cylinders for medical rescue personnel in plateau environments; the oxygen inhalation and exhaust unit can provide the wounded with primary and secondary oxygen inhalation, which is helpful for the treatment of the wounded.

[0279] According to the embodiment provided by the present invention, Figure 1 , Figure 2 As shown, the first drive axle 102, the second drive axle 103, the third drive axle 104 and the fourth drive axle 105 can all transmit driving force, and the vertical distance between the lowest point of the first drive axle 102, the second drive axle 103, the third drive axle 104 and the fourth drive axle 105 and the ground is ≥420mm.

[0280] In a specific implementation, the chassis 1 preferably adopts the existing 8×8 all-terrain chassis 1 with a minimum ground clearance of 420 mm, which can effectively improve the off-road performance of the hyperbaric oxygen chamber vehicle.

[0281] In one embodiment, if Fig.10 As shown, the stretcher lifting device 6 includes a driving part and a transmission part;

[0282] The transmission part includes a fixing part 601 provided with a slide groove; the fixing part 601 is fixedly installed on the outer side of the rear end wall of the cabin 2; and also includes a guide rail 602 matched with the slide groove; the lower end of the guide rail 602 is foldably connected to a stretcher bracket 603;

[0283] The output end of the driving unit is connected to the guide rail 602 and is configured to drive the guide rail 602 to move up and down along the slide groove.

[0284] It should be noted that the fixing part 601 preferably adopts two steel rod-shaped parts, which are longitudinally fixed to the outer side of the rear end wall of the cabin 2 by screws, and are respectively located on both sides of the rear access door; each fixing part 601 is provided with a longitudinal slide groove; the guide rail 602 is preferably made of steel material, and also adopts two and correspondingly slides with the two slide grooves; a rack structure is provided on one side of each guide rail 602.

[0285] It should be noted that the driving part preferably adopts a two-stepping motor structure, and a gear is disposed at the output end thereof, which can be matched with the racks of the two guide rails 602 accordingly; the driving part is electrically connected to the stretcher lifting device power unit box 604 arranged at the lower part of the cabin 2; after power is turned on, the driving part rotates and drives the rack through the gear to drive the guide rail 602 to move up and down in the slide groove;

[0286] In addition to using a gear rack transmission mechanism between the driving part and the transmission part, a chain transmission mechanism, for example, can also be used, that is, a transmission chain is added between the guide rail 602 and the fixed part 601, and the driving part drives the chain to operate, thereby driving the guide rail 602 to move up and down along the fixed part 601; it should be noted that no matter which transmission mechanism is adopted, as long as the driving part can drive the guide rail 602 to move up and down along the fixed part 601, the assisting effect of the stretcher lifting device 6 can be achieved.

[0287] It should be noted that the lower ends of the two guide rails 602 are connected to the stretcher bracket 603 through hinges; the two stretcher brackets 603 are connected by a crossbeam; when the stretcher lifting device 6 is not in use, the stretcher bracket 603 is folded in the direction of the guide rails 602 and is in a retracted state. Preferably, the stretcher bracket 603 can be fixed by a snap structure fixed to the rear end wall of the cabin 2; when in use, unlock the snap and flip the stretcher bracket 603 downward to form a 90° angle with the guide rails 602; start the power supply, the drive unit drives the guide rails 602 to move down to a suitable position, and places the stretcher carrying the injured on the stretcher bracket 603; start the drive unit in reverse to drive the guide rails 602 to move up, and lift the stretcher to a position suitable for the exit door.

[0288] It should be noted that the specific technical parameters of the stretcher lifting device 6 are as follows:

[0289] Stretcher support 603 size: W2300×H(1800+1100);

[0290] Maximum lifting height 1700mm;

[0291] Maximum load-bearing mass: 500 kg (center of gravity within 1200 mm from the base of the board);

[0292] Total weight is not more than 350kg;

[0293] DC power supply 24V;

[0294] Motor power 2kW;

[0295] Load rising speed: ≥60mm / s;

[0296] Load lowering speed: ≤120mm / s;

[0297] The fixed control switch is arranged on the power unit box 604 of the stretcher lifting device, and at least includes a main power switch, a power indicator light, raising / lowering, and on / off;

[0298] The control switch is equipped with a four-button wired remote control with an emergency stop switch (including an installation box). The control line of the remote control is not less than 10 meters long and is equipped with a 7-hole Y50X-1207TJ07+80 electrical connector plug;

[0299] High altitude adaptability, able to work normally at an altitude of 5,200 meters or below;

[0300] A door opening travel switch is added on the upper part of the oxygen chamber access door 215. When the door is not closed, the stretcher lifting device 6 cannot be started.

[0301] In specific implementation, the stretcher lifting device 6 can conveniently and quickly assist in lifting the stretcher of the injured and sick, saving the physical strength of medical staff and ensuring that the injured and sick will not suffer secondary injuries.

[0302] It should be noted that the hyperbaric oxygen chamber vehicle also includes an electrical system, which preferably adopts an external power supply, mains electricity or self-generated power; the electrical system includes a power adapter board, a distribution box, a distribution cabinet 10, lighting and an electrical system of oxygen chamber parts; the electrical system in the oxygen chamber room 203 mainly includes lighting, intercom, monitoring, emergency alarm, oxygen measurement, emergency power supply, music player, parameter centralized display and other parts; the power adapter board, distribution box, equipment room 201 lighting and the like are arranged in the equipment room 201; the distribution cabinet 10, parameter centralized display, operation room 202 lighting, music player, intercom and the like are arranged in the operation room 202; monitoring, oxygen chamber lighting, emergency alarm, oxygen measurement, emergency power supply and the like are arranged in the oxygen chamber room 203; the self-generated power system provides a reliable and stable power supply for the hyperbaric oxygen chamber vehicle through a power take-off, has alarm and protection functions, and can meet the power self-sustaining requirements for field operations.

[0303] It should be noted that if Figure 1 , Figure 2 As shown, the hyperbaric oxygen chamber vehicle also includes a leveling leg 106, which is arranged between the first drive axle 102 and the second drive axle 103 and behind the fourth drive axle 105; it provides a stable and highly horizontal erection platform for the hyperbaric oxygen chamber vehicle, and has a one-button automatic leveling function.

[0304] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0305] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A high-altitude hyperbaric oxygen chamber vehicle based on automatic pressure control, characterized in that: It includes shelter, control system, fire fighting system, oxygen supply system, chassis and stretcher lifting device; The interior of the shelter is divided into an equipment room, an operation room and an oxygen chamber room by partitions from front to back; The control system includes a PLC module, an environment monitoring unit, an environment regulating unit, a pressure supply unit and a pressure regulating unit; The PLC module is arranged in the operating room, electrically connected to the environment monitoring unit, the environment regulating unit and the pressure regulating unit, and is used to receive the signal transmitted by the environment monitoring unit and send control instructions to the environment regulating unit and the pressure regulating unit; The environmental monitoring unit is arranged in the oxygen chamber and is used to collect data on pressure, temperature and air quality in the oxygen chamber in real time; The environmental conditioning unit is arranged outside the shelter, in the equipment room, the operation room and the oxygen cabin room, and is used to improve the air quality in the oxygen cabin room; The pressure supply unit is arranged in the equipment room and is used to provide high-pressure air to the oxygen chamber; The pressure regulating unit is arranged in the oxygen chamber and connected to the pressure supply unit through a pressure pipeline; the pressure regulating unit is used to manually or automatically control the internal pressure of the oxygen chamber and the pressure increase and decrease rate of the oxygen chamber, and control the internal pressure of the oxygen chamber to be no more than 0.2MPa; the pressure increase rate of the oxygen chamber from normal pressure to 0.03MPa can also be controlled within 0.004MPa / min through automatic control and regulation, thereby reducing the incidence of middle ear barotrauma; The fire fighting system is arranged in the equipment room and is used for emergency fire fighting in case of sudden fire in the oxygen chamber; The fire-fighting system is provided with an ice-melting device inside; the ice-melting device is used to collect the temperature of the fire-fighting water, and to prevent the fire-fighting water from freezing or to melt the ice of the fire-fighting water when the ambient temperature is not lower than -41°C; The oxygen supply system includes an oxygen source, an automatic oxygen filling and supplying device, and an oxygen suction and exhausting device; The oxygen source is arranged in the operating room and connected to the automatic oxygen filling and supply device through an oxygen pipeline; the oxygen source is used to store and release oxygen; The automatic oxygen filling and supply device is arranged in the operating room and connected to the oxygen suction and exhaust device through an oxygen pipeline; the automatic oxygen filling and supply device is used to automatically control the oxygen release of the oxygen source and automatically replenish oxygen for the oxygen source; The oxygen inhalation and exhaust unit is arranged in the oxygen chamber, and is used to provide oxygen required by the wounded and sick in the oxygen chamber, and exhaust the waste gas exhaled and the uninhaled oxygen of the wounded and sick to the outside; The chassis comprises a frame and a first drive axle, a second drive axle, a third drive axle and a fourth drive axle fixed below the frame; the frame is used to carry the cabin; a buffer device with a double wishbone independent suspension and a torsion bar spring structure is used between the first drive axle and the frame; a buffer device with a double wishbone independent suspension and a variable stiffness coil spring structure is used between the second drive axle, the third drive axle and the fourth drive axle and the frame; The stretcher lifting device is arranged outside the rear end of the cabin and is used to provide assistance for lifting the stretcher.

2. The plateau hyperbaric oxygen chamber vehicle based on automatic pressure control according to claim 1 is characterized in that: The oxygen chamber is a rectangular cavity structure, and the four edges in the length direction are all arc-shaped chamfered shapes, and are made of Q345R hot-rolled steel plate; The inner surface of the oxygen chamber is provided with crisscross reinforcing ribs; The reinforcing ribs are of unequal thickness groove-shaped structures, and the bottom plate thickness is greater than the side plate thickness.

3. The plateau hyperbaric oxygen chamber vehicle based on automatic pressure control according to claim 1 is characterized in that: The pressure supply unit includes an air compressor, a buffer tank and an air storage tank; The air compressor is arranged at one side of the equipment room, fixedly mounted on the bottom plate of the shelter, and connected to the buffer tank via a pressure pipeline; The buffer tank is arranged at the other side of the equipment room and fixedly mounted on the bottom plate of the shelter, and connected to the gas storage tank through a pressure pipeline; The gas storage tank is arranged on one side of the buffer tank, fixedly mounted on the bottom plate of the cabin, and connected to the pressure regulating unit through a pressure pipeline.

4. The plateau hyperbaric oxygen chamber vehicle based on automatic pressure control according to claim 3 is characterized in that: The pressure regulating unit adopts an integrated panel structure, including a pressure regulating valve, a pressure reducing valve, an emergency pressure relief valve and a safety valve installed on the integrated panel; The pressure regulating valve is connected to the gas storage tank through a pressure pipeline, and is used to supply gas and increase pressure to the oxygen chamber according to a set pressure value and a pressurization rate; The pressure reducing valve is connected to the outside through a pressure pipeline, and is used to discharge the air inside the oxygen chamber to the outside at a set pressure reducing rate; The emergency pressure relief valve is connected to the outside world through a pressure pipeline, and is used to quickly discharge the air in the oxygen chamber to the outside world in an emergency; The safety valve is connected to the outside through a pressure pipeline and is used to limit the internal pressure of the oxygen chamber to below 0.2MPa.

5. The plateau hyperbaric oxygen chamber vehicle based on automatic pressure control according to claim 4 is characterized in that: The environmental conditioning unit includes an air conditioner, an air filter and an air intake and exhaust device, all of which are electrically connected to the PLC module; the air conditioner includes an indoor unit, an outdoor unit and a fuel heater; The outdoor unit is arranged outside the upper end of the front part of the cabin; the indoor unit is arranged in the oxygen cabin and connected to the outdoor unit through an air conditioning pipeline; The fuel heater is installed inside the outdoor unit and is used for auxiliary heating of the air conditioner; The air filter is installed in the pressure pipeline between the air storage tank and the pressure regulating unit, and is used to purify the compressed air delivered to the oxygen chamber; The air intake and exhaust equipment are respectively arranged on the top walls of the equipment room and the operation room, and are used to replace air for the equipment room and the operation room.

6. The plateau hyperbaric oxygen chamber vehicle based on automatic pressure control according to claim 5 is characterized in that: The environment monitoring unit includes a temperature sensor, an air pressure sensor, an oxygen concentration sensor, a carbon dioxide sensor, a carbon monoxide sensor, an ammonia sensor, and a hydrogen sulfide sensor which are arranged in the oxygen chamber and electrically connected to the PLC module.

7. The plateau hyperbaric oxygen chamber vehicle based on automatic pressure control according to claim 6 is characterized in that: The PLC module is electrically connected to the pressure regulating valve, pressure reducing valve, emergency pressure relief valve and safety valve, and automatically controls the pressure regulating valve, pressure reducing valve, emergency pressure relief valve, safety valve, air conditioning and air intake and exhaust equipment according to the information collected by the temperature sensor, air pressure sensor, oxygen concentration sensor, carbon dioxide sensor, carbon monoxide sensor, ammonia sensor and hydrogen sulfide sensor, so as to adjust the temperature, air pressure and air quality in the oxygen cabin; The PLC module is provided with a touch screen, and the pressure regulating valve, pressure reducing valve, emergency pressure relief valve, safety valve, air conditioner and air intake and exhaust equipment can all be manually operated and controlled through the touch screen.

8. The plateau hyperbaric oxygen chamber vehicle based on automatic pressure control according to claim 7 is characterized in that: The PLC module obtains a pressure target value, calculates a current pressure value in the oxygen chamber using a pressure estimation model, processes the pressure target value and the current pressure value in the oxygen chamber using a pressure control model, obtains a valve opening value of the pressure regulating valve, and controls the pressure regulating valve using the valve opening value of the pressure regulating valve; The calculation expression of the pressure estimation model is: Among them, m t is the gas mass in the oxygen chamber at time t, the flow rate at the inlet end of the pressure regulating valve is q1, the flow rate at the exhaust end of the pressure regulating valve is q2, and ρ is the density of standard dry air, which is 1.29 kg / m 3 , P0 is the current pressure value, which is measured by the pressure sensor, R0 is the gas constant, V is the internal volume of the oxygen chamber, T is the temperature constant, which is 293K, R t is the corrected gas constant at time t.

9. The high-altitude hyperbaric oxygen chamber vehicle based on automatic pressure control according to claim 8, characterized in that: The pressure control model is used to calculate the pressure target value and the current pressure value in the oxygen chamber to obtain the pressure error value E and the error conversion rate value EC, and use the process control method to process the pressure error value E and the error conversion rate value EC to obtain control variables ΔKP, ΔKI, ΔKD, and use the control variables to determine the valve opening value of the pressure regulating valve.

10. The plateau hyperbaric oxygen chamber vehicle based on automatic pressure control according to claim 3, characterized in that: The fire protection system includes a water injection pump, a fire water tank, a booster pump and a fire sprinkler; The water injection pump is arranged on one side of the equipment room close to the air compressor and connected to the fire water tank through a fire pipeline; the water injection pump is used to fill the fire water tank with water; The fire water tank is arranged at the rear side of the buffer tank in the equipment room and is connected to the booster pump through a fire pipeline; the fire water tank is used to store fire water; The booster pump is arranged at the upper end of the front wall of the equipment room and connected to the fire sprinkler through a fire pipeline; the booster pump is used to pump fire-fighting water from the fire water tank and pressurize the fire-fighting water; The fire sprinkler is arranged at the upper end of the front wall of the oxygen chamber and is used to spray fire-fighting water into the oxygen chamber in case of a sudden fire.

11. The plateau hyperbaric oxygen chamber vehicle based on automatic pressure control according to claim 10, characterized in that: The ice melting device includes an ice melting electric heater and a temperature sensor placed inside the fire water tank, and an ice melting power switch arranged outside the fire water tank; The ice-melting power switch and the temperature sensor are both electrically connected to the PLC module.

12. The plateau hyperbaric oxygen chamber vehicle based on automatic pressure control according to claim 1, characterized in that: The oxygen source includes at least 2 oxygen cylinders; The oxygen cylinder is connected to the automatic oxygen filling and supply device through an oxygen pipeline; The oxygen inhalation and exhaust unit includes at least two sets of oxygen inhalation masks; the oxygen inhalation masks are connected to the automatic oxygen filling and supply device through oxygen pipelines; the oxygen inhalation masks include a first-level mask used for seriously injured patients and a second-level mask used for injured patients who can breathe independently.

13. The plateau hyperbaric oxygen chamber vehicle based on automatic pressure control according to claim 1, characterized in that: The first drive axle, the second drive axle, the third drive axle and the fourth drive axle can all transmit driving force, and the vertical distance between the lowest point of the first drive axle, the second drive axle, the third drive axle and the fourth drive axle and the ground is ≥420mm.

14. The high-altitude hyperbaric oxygen chamber vehicle based on automatic pressure control according to claim 1, characterized in that: The stretcher lifting device comprises a driving part and a transmission part; The transmission part includes a fixed part provided with a slide groove; the fixed part is fixedly mounted on the outer side of the rear end wall of the cabin; and also includes a guide rail matched with the slide groove; the lower end of the guide rail is foldably connected to a stretcher bracket; The output end of the driving unit is connected to the guide rail and is configured to drive the guide rail to move up and down along the slide groove.

Images