Split type vehicle-mounted intelligent oxygen supply system based on VPSA technology and control method

Abstract

The invention discloses a split type vehicle-mounted intelligent oxygen supply system based on the VPSA technology and a control method, and the system comprises an air compressor which is arranged at the inner side of a wheel cover protection plate of a rear wheel of a vehicle and is used for compressing air and discharging the compressed air to a molecular sieve assembly; the molecular sieve assembly is arranged below a spare tire in a trunk of the vehicle and is used for separating nitrogen from oxygen in the air to generate oxygen; the oxygen conveying pipe is arranged on the inner side of the vehicle roof and connected with an oxygen outlet of the molecular sieve assembly, and an oxygen outlet is formed in the position, located above each seat, of the oxygen conveying pipe; the detection module comprises an altitude sensor and an oxygen concentration sensor, the altitude sensor is installed on the molecular sieve assembly, and the oxygen concentration sensor is arranged on a ceiling in a vehicle compartment; distributed arrangement is adopted, all parts of the oxygen supply system are installed at different positions of the vehicle, the space occupied by the oxygen generation system can be reduced, and meanwhile directional oxygen supply to specific seats is achieved through the distributed oxygen outlets.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicle oxygen supply, and in particular relates to a split-type vehicle-mounted intelligent oxygen supply system and a control method based on VPSA technology. Background Art

[0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] As people's living standards improve, cars have become an indispensable means of transportation. To enhance the comfort and health of both the driver and passenger, it's crucial to equip vehicles with oxygen supply systems. For example, when traveling in plateau areas, the thin air can easily cause altitude sickness, such as headaches and difficulty breathing, which can be life-threatening in severe cases. Long driving periods can also lead to a buildup of carbon dioxide in the vehicle cabin, causing fatigue and decreased concentration. Furthermore, patients with chronic respiratory diseases require continuous oxygen therapy during long journeys.

[0004] In the prior art, in order to realize the oxygen supply function in the vehicle, the traditional method is for users to bring their own compressed oxygen cylinders and manually supply oxygen through masks or nasal cannulas. However, oxygen cylinders are high-pressure containers and are prone to explosion in collisions. In addition, the capacity of oxygen cylinders is limited, and oxygen can only be supplied for a short time, which cannot meet the demand for long-distance oxygen supply. At present, some vehicles are equipped with integrated on-board oxygen concentrators, which are used to supply oxygen. Due to the large size and space occupied by oxygen concentrators, oxygen concentrators are usually integrated in the trunk or under the seats, which has the following problems: First, the molecular sieve tank and compressor of the oxygen concentrator are arranged in a centralized manner, which takes up a lot of space, causes vibration and noise, and affects the driving quality; second, the deoxygenation port of the oxygen concentrator is single, the oxygen concentration in the entire cabin is unevenly distributed, and oxygen cannot be supplied to specific seats in a targeted manner; third, automatic control of the oxygen production mode and oxygen concentration cannot be achieved, and manual adjustment is required. Summary of the Invention

[0005] The purpose of the present invention is to provide a split-type vehicle-mounted intelligent oxygen supply system and control method based on VPSA technology. By adopting a distributed layout, the various components of the oxygen supply system are installed in different positions of the vehicle, which can reduce the space occupied by the oxygen production system. At the same time, through the distributed oxygen outlets, directional oxygen supply to specific seats can be achieved.

[0006] In order to achieve the above object, the present invention is implemented through the following technical solutions: In a first aspect, an embodiment of the present invention provides a split-type vehicle-mounted intelligent oxygen supply system based on VPSA technology, comprising: An air compressor is arranged on the inner side of the rear wheel guard plate of the vehicle and is used to compress the air and discharge it to the molecular sieve assembly; The molecular sieve assembly is installed under the spare tire in the trunk of the vehicle and is used to separate nitrogen and oxygen from the air to produce oxygen; The oxygen supply pipe is installed on the inside of the vehicle roof and is connected to the oxygen outlet of the molecular sieve assembly. The oxygen supply pipe is provided with an oxygen outlet above each seat; The detection module includes an altitude sensor and an oxygen concentration sensor. The altitude sensor is installed on the molecular sieve assembly, and the oxygen concentration sensor is set on the ceiling in the vehicle compartment.

[0007] As a further technical solution, the molecular sieve assembly includes two molecular sieve tanks, both of which are filled with molecular sieves. One molecular sieve tank adsorbs nitrogen in the air and discharges oxygen, and the other molecular sieve tank desorbs nitrogen in the molecular sieve. The two molecular sieve tanks work alternately.

[0008] As a further technical solution, the air compressor adopts a four-cylinder compressor, two cylinders of which provide positive pressure to the molecular sieve tank to produce oxygen, and the other two cylinders provide negative pressure to another molecular sieve tank to desorb nitrogen.

[0009] As a further technical solution, the oxygen supply tube is further provided with an emergency oxygen outlet, and an oxygen mask interface is provided at the emergency oxygen outlet, and the oxygen mask interface is connected to the oxygen mask through a pipeline.

[0010] As a further technical solution, the air compressor is arranged in a sound-absorbing shell, and a heat dissipation fan is also arranged in the sound-absorbing shell.

[0011] As a further technical solution, a controller is also included, which is electrically connected to the air compressor and the detection module. The controller is also connected to the vehicle ECU and interacts with the entire vehicle through a display screen inside the vehicle.

[0012] In a second aspect, an embodiment of the present invention provides a control method for a split-type vehicle-mounted intelligent oxygen supply system based on VPSA technology, comprising: Get the vehicle's current altitude and calculate the target oxygen concentration in the vehicle based on a preset piecewise function; Real-time monitoring of the oxygen concentration inside the vehicle. When the oxygen concentration approaches the target lower limit and the decay rate exceeds the threshold, the oxygen supply system is activated in advance. Selecting a corresponding working mode based on the difference between the target oxygen concentration and the actual oxygen concentration; When the oxygen concentration in the vehicle exceeds 28%, the oxygen supply system will be forced to shut down and the vehicle ventilation system will be activated.

[0013] As a further technical solution, the preset piecewise function includes: When the altitude is ≤1500m, the target oxygen concentration = 21%; When the altitude is 1500m < ≤ 4000m, the target oxygen concentration = 21% + 0.001 × (altitude - 1500); When the altitude is greater than 4000m, the target oxygen concentration is 24.5%.

[0014] As a further technical solution, the working modes include forest mode, plateau mode and oxygen therapy mode; When the difference between the target oxygen concentration and the actual oxygen concentration is less than or equal to 1%, the forest mode is activated to provide low-flow oxygen. When the difference between the target oxygen concentration and the actual oxygen concentration is less than or equal to 1%, the plateau mode is activated and medium-flow oxygen supply is performed. When the difference between the target oxygen concentration and the actual oxygen concentration is greater than 2%, the oxygen therapy mode is activated and high-flow oxygen supply is performed.

[0015] As a further technical solution, an emergency mode is also included, in which oxygen is only discharged through the emergency oxygen outlet and a high flow rate of oxygen is output.

[0016] The beneficial effects of the above embodiments of the present invention are as follows: The oxygen supply system provided by the present invention adopts a distributed layout to reduce the space occupied by the oxygen production system. By placing the compressor on the inner side of the wheel arch guard, the vehicle body structure is used to shield vibration noise and avoid steering wheel resonance; by sinking the molecular sieve assembly to the spare tire area, the effective volume of the trunk is not occupied, and the mass damping effect of the spare tire is used to absorb impact; through the hidden oxygen supply pipe in the ceiling, non-sensing oxygen supply is achieved, avoiding the discomfort of direct blowing from the traditional center console air outlet; in addition, by arranging multiple oxygen outlets on the oxygen supply pipe, each oxygen outlet corresponds to the position above each seat, distributed oxygen supply can be achieved to ensure uniform oxygen concentration in the entire cabin.

[0017] In the oxygen supply system provided by the present invention, the air compressor adopts a four-cylinder compressor to realize pressure swing adsorption oxygen production, wherein two cylinders provide positive pressure to the molecular sieve tank for oxygen production, and the other two cylinders provide negative pressure to another molecular sieve tank for desorbing nitrogen. The positive pressure adsorption pressure is reduced, the power is reduced by about, and the temperature rise of the compressor is reduced; the negative pressure desorption allows the nitrogen to be desorbed thoroughly, and the oxygen production efficiency is high, which is increased to 80%; and the oxygen production efficiency is improved, the compressed air demand of the compressor is reduced, and the operating life is significantly improved.

[0018] The oxygen supply system provided by the present invention is provided with two molecular sieve tanks, one tank is used for adsorption and oxygen production, and the other tank is used for desorption and regeneration, which can realize continuous production of oxygen.

[0019] The control method provided by the present invention predicts the risk of hypoxia based on the real-time detected oxygen concentration and the decay rate of the oxygen concentration, can promptly start the oxygen supply system when hypoxia does not occur, and can improve the oxygen supply response speed; the set target oxygen concentration matches the altitude concentration at which the vehicle is located, which can ensure the maximum comfort of the passengers in the vehicle; different working modes are selected according to the difference between the target oxygen concentration and the actual oxygen concentration to optimize the oxygen supply process; when the oxygen concentration in the vehicle exceeds 28%, the oxygen supply system is forcibly shut down and the vehicle ventilation system is started to avoid oxygen poisoning.

[0020] The control method provided by the present invention, through the setting of the above-mentioned piecewise function, achieves the maintenance of normoxia below 1500m above sea level, avoiding free radical damage caused by excessive oxygen supply; above 4000m, the 24.5% concentration accurately matches the medical safety line of blood oxygen saturation ≥95%; between 1500m and 4000m, a linear function is used to calculate the target oxygen concentration to eliminate dizziness symptoms caused by step-like concentration jumps; by setting different working modes, it adapts to different scene requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0022] Figure 1 is a schematic diagram of the split-type vehicle-mounted intelligent oxygen supply system of the present invention; Figure 2 is a schematic diagram of the split-type vehicle-mounted intelligent oxygen supply system of the present invention installed on a vehicle; Figure 3 This is a gas circuit schematic diagram of the split-type vehicle-mounted intelligent oxygen supply system of the present invention; Figure 4 This is a control principle diagram of the split-type vehicle-mounted intelligent oxygen supply system of the present invention; Figure 5 is a schematic diagram of an air compressor intake filter assembly of the present invention; Figure 6 is a schematic diagram of an air compressor assembly of the present invention; Figure 7 It is a working principle diagram of the air compressor of the present invention; Figure 8 is a schematic diagram of a molecular sieve assembly of the present invention; Figure 9 It is a schematic diagram of the display interface of the split-type vehicle-mounted intelligent oxygen supply system of the present invention.

[0023] The diagram is for illustrative purposes only; Among them, 1. Air compressor assembly; 101. Compressor silencer cover; 102. DC compressor body; 103. Exhaust silencer box; 104. Cooling fan; 2. Intake assembly; 201. Intake filter housing; 202. Intake filter cotton; 203. Intake silencer box; 3. Exhaust assembly; 4. Molecular sieve assembly; 401. Molecular sieve tank; 402. Oxygen storage tank; 403. Pressure regulating valve; 404. Electronic flow control valve; 5. Altitude sensor; 6. Oxygen supply pipe; 601. Oxygen outlet; 602. Emergency oxygen outlet; 7. Oxygen concentration sensor; 8. Emergency oxygen mask; 9. Flow sensor. DETAILED DESCRIPTION

[0024] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0025] Example 1 In a typical embodiment of the present invention, a split vehicle-mounted intelligent oxygen supply system based on VPSA technology is provided. Figure 1 and Figure 2 Shown, including: An air compressor is arranged on the inner side of the rear wheel guard plate of the vehicle and is used to compress the air and discharge it to the molecular sieve assembly; The molecular sieve assembly is installed under the spare tire in the trunk of the vehicle and is used to separate nitrogen and oxygen from the air to produce oxygen; The oxygen supply pipe is installed on the inside of the vehicle roof and is connected to the oxygen outlet of the molecular sieve assembly. The oxygen supply pipe is provided with an oxygen outlet above each seat; The detection module includes an altitude sensor and an oxygen concentration sensor. The altitude sensor is installed on the molecular sieve assembly, and the oxygen concentration sensor is set on the ceiling in the vehicle compartment.

[0026] The above-mentioned oxygen supply system places the compressor on the inside of the wheel arch guard, uses the body structure to shield vibration noise and avoid steering wheel resonance; by sinking the molecular sieve assembly to the spare tire area, it does not occupy the effective volume of the trunk, and at the same time uses the mass damping effect of the spare tire to absorb impact; and achieves "sensory oxygen supply" through the hidden oxygen supply pipe in the ceiling, avoiding the discomfort of direct blowing from the traditional center console air outlet.

[0027] like Figure 8 As shown, the molecular sieve assembly includes two molecular sieve tanks, both of which are filled with molecular sieves. One molecular sieve tank adsorbs nitrogen in the air and discharges oxygen, and the other molecular sieve tank desorbs nitrogen in the molecular sieve. The two molecular sieve tanks work alternately.

[0028] In this embodiment, the molecular sieve can be a combination of lithium-based and sodium-based molecular sieves. Among them, the lithium-based molecular sieve has a fast oxygen release rate, high adsorption efficiency and is easily affected by moisture, while the sodium-based molecular sieve has strong moisture resistance, good stability and relatively low conversion efficiency. The use of a molecular sieve combining the two can combine the advantages of both molecular sieves. The adsorption and desorption principle of the molecular sieve is as follows: compressed air enters the molecular sieve tank after purification and drying. The molecular sieve adsorbs nitrogen in the air under a certain pressure, while oxygen flows out through the gaps in the molecular sieve. When the molecular sieve is saturated with adsorption, the molecular sieve desorbs nitrogen by reducing the pressure, thereby achieving continuous production of oxygen. The system is equipped with two molecular sieve tanks, one for adsorption and oxygen production, and the other for desorption and regeneration.

[0029] like Figure 6 and Figure 7 As shown, the air compressor uses a four-cylinder compressor, two of which provide positive pressure to the molecular sieve tank to produce oxygen, and the other two provide negative pressure to another molecular sieve tank to desorb nitrogen. The air compressor is placed in a soundproofing enclosure, which is also equipped with a cooling fan.

[0030] The performance parameter requirements of the air compressor are as follows:

[0031] Notes are as follows: (1) Compressor rated power ≤ 550W, rated current ≤ 50A (12V); (2) The compressor works normally at DC 9V~16V; when it is lower than 8.5V or higher than 16.5V, the hysteresis range is: 8.5V~9.0V; 16.0V~16.5V needs to report undervoltage or overvoltage fault through the intelligent oxygen chamber controller.

[0032] (3) Quiescent current < 0.1 mA; (4) The compressor is working without any abnormal sound (such as rattling sound); (5) EMC meets the requirements of Q / SQR E8-4-2024.

[0033] In this embodiment, the air inlet of the air compressor is connected to the air inlet filter assembly, such as Figure 5 As shown, the air intake filter assembly includes an air intake filter outer box, air intake filter cotton and an air intake silencer box. The air intake filter assembly is set to filter the intake air, isolate dust and other particulate matter, absorb moisture, and allow clean air to enter the oxygen cabin system. It not only protects the life of the entire system and makes the produced oxygen healthier, but also plays a role in silencing and reducing intake noise.

[0034] The sample preparation process in this embodiment utilizes a VPSA (pressure swing adsorption) oxygen production process, utilizing a four-cylinder compressor to achieve positive-pressure adsorption, negative-pressure desorption, and vacuum maintenance in the molecular sieve tank. Positive-pressure adsorption reduces pressure, power consumption, and compressor temperature rise. Negative-pressure desorption allows for thorough nitrogen desorption, resulting in a high oxygen production efficiency of 80%. This increased oxygen production efficiency reduces the compressor's compressed air demand and significantly extends its operating life. A vacuum maintenance function is incorporated into the oxygen concentrator's shutdown logic to ensure the molecular sieve is stored in a relatively dry vacuum environment, significantly extending the unit's storage and operating life.

[0035] The existing PSA (gas adsorption) oxygen production process uses positive pressure adsorption and atmospheric pressure desorption. Positive pressure adsorption results in high pressure, high overall system power, and high temperature rise. Atmospheric pressure desorption is incomplete, resulting in a low oxygen production efficiency of only 40%. This requires a large volume of compressed air from the compressor, resulting in relatively high wear on the compressor cups and a slightly shorter service life. Atmospheric pressure desorption allows moisture vapor from a humid environment to enter the molecular sieve tank, where it remains after shutdown, causing the molecular sieve to rapidly fail.

[0036] like Figure 1 As shown, the oxygen supply pipe is also provided with an emergency oxygen outlet, which is provided with an oxygen mask interface. The oxygen mask interface is connected to the oxygen mask through a pipe. Oxygen is delivered to a designated location throughout the vehicle to achieve a balanced increase in oxygen concentration throughout the vehicle. The oxygen outlet and the emergency oxygen outlet can both be adjusted for oxygen outlet direction and flow rate.

[0037] In this embodiment, an oxygen concentration sensor can monitor the cabin's oxygen concentration in real time. The oxygen concentration sensor can be a zirconia sensor, ultrasonic sensor, or fluorescent sensor. Two oxygen concentration sensors can be installed, one on the front and one on the back of the ceiling, to improve detection accuracy. An altitude sensor is used to monitor the vehicle's altitude in real time. Both the oxygen concentration sensor and the altitude sensor utilize existing structures.

[0038] In this embodiment, a controller is also included, which is electrically connected to the air compressor and the detection module. The controller is also connected to the vehicle ECU and interacts with the entire vehicle through the display screen inside the vehicle. The control principle of the system is as follows Figure 4 As shown, the power board provides power to the motor of the air compressor and the main control board of the controller. The controller controls the valves and the motor of the air compressor in the system according to the data obtained by the detection module to control the working state of the oxygen supply system.

[0039] The working principle of the oxygen supply system of this embodiment is as follows Figure 3As shown, the air is filtered through the air intake filter element and the air intake box. The clean air is compressed by the air compressor and then discharged into the molecular sieve tank through the reversing solenoid valve. The nitrogen and oxygen in the air are separated by the adsorption performance of the molecular sieve, and finally a high concentration of oxygen is obtained to meet the user's demand for oxygen enrichment. The two molecular sieve tanks switch back and forth and work alternately, one to store oxygen and the other to discharge nitrogen. The core of VPSA technology is negative pressure desorption. The compressor is a four-cylinder compressor. Two cylinders press oxygen positively and two cylinders desorb nitrogen negatively to ensure oxygen production efficiency and oxygen concentration. It is in a vacuum state when not working, which can effectively prevent external water, dust, etc. from entering the oxygen cabin system and improve product life.

[0040] Example 2 A typical embodiment of the present invention provides a control method for a split-type vehicle-mounted intelligent oxygen supply system based on VPSA technology, comprising: Get the vehicle's current altitude and calculate the target oxygen concentration in the vehicle based on a preset piecewise function; Real-time monitoring of the oxygen concentration inside the vehicle. When the oxygen concentration approaches the target lower limit and the decay rate exceeds the threshold, the oxygen supply system is activated in advance. Selecting a corresponding working mode based on the difference between the target oxygen concentration and the actual oxygen concentration; When the oxygen concentration in the vehicle exceeds 28%, the oxygen supply system will be forced to shut down and the vehicle ventilation system will be activated.

[0041] The control method provided in this embodiment predicts the risk of hypoxia based on the real-time detected oxygen concentration and the decay rate of the oxygen concentration. It can promptly activate the oxygen supply system when hypoxia does not occur, thereby improving the oxygen supply response speed. The set target oxygen concentration matches the altitude concentration at which the vehicle is located, thereby ensuring maximum comfort for the passengers in the vehicle. Different operating modes are selected based on the difference between the target oxygen concentration and the actual oxygen concentration to optimize the oxygen supply process. When the oxygen concentration in the vehicle exceeds 28%, the oxygen supply system is forcibly shut down and the vehicle ventilation system is activated to avoid oxygen poisoning.

[0042] Furthermore, the preset piecewise function includes: When the altitude is ≤1500m, the target oxygen concentration = 21%; When the altitude is 1500m < ≤ 4000m, the target oxygen concentration = 21% + 0.001 × (altitude - 1500); When the altitude is greater than 4000m, the target oxygen concentration is 24.5%.

[0043] By setting up the above-mentioned piecewise function, it is possible to maintain normoxia (21%) below 1500m above sea level to avoid free radical damage caused by excessive oxygen supply; the 24.5% concentration above 4000m accurately matches the medical safety line of blood oxygen saturation ≥95%; between 1500m and 4000m, a linear function is used to calculate the target oxygen concentration to eliminate dizziness symptoms caused by step-like concentration jumps.

[0044] Furthermore, the working modes include forest mode, plateau mode and oxygen therapy mode; When the difference between the target oxygen concentration and the actual oxygen concentration is less than or equal to 1%, the forest mode is activated to provide low-flow oxygen. When the difference between the target oxygen concentration and the actual oxygen concentration is less than or equal to 1%, the plateau mode is activated and medium-flow oxygen supply is performed. When the difference between the target oxygen concentration and the actual oxygen concentration is greater than 2%, the oxygen therapy mode is activated and high-flow oxygen supply is performed.

[0045] Specifically, the low flow rate in forest mode is controlled at around 40%, the medium flow rate in plateau mode is controlled at around 70%, and the high flow rate in oxygen therapy mode is 100%. By setting different working modes, it can adapt to different scene requirements.

[0046] Furthermore, an emergency mode is included. In this mode, oxygen is discharged only through the emergency oxygen outlet, and the output is high-flow oxygen. Emergency mode is suitable for the case of a sudden illness of the occupant. By forcibly shutting off the diffuse oxygen supply, the emergency oxygen flow rate is increased, bringing the emergency oxygen supply capacity of ordinary vehicles to ambulance-level levels.

[0047] The oxygen supply system in Example 1 can also be manually controlled through the display screen in the vehicle, such as Figure 9 As shown, the interface displayed on the display screen, where a is the oxygen outlet corresponding to the top of the front driver and co-driver seats; b is the oxygen outlet corresponding to the top of the second row behind the driver and co-driver seats; and c is the emergency oxygen outlet.

[0048] Return button: click to exit the oxygen production operation interface, or after the last operation on the interface is completed (the action includes all contacts under the page), ICC starts timing, and automatically exits the interface after 20 seconds and returns to the previous page. If you manually press the return button during the 20-second countdown, you will exit the interface directly.

[0049] Display area: displays the altitude and current oxygen concentration information in the vehicle in real time; when the concentration is lower than threshold 1 or higher than threshold 2, the concentration value is displayed in orange, otherwise it is displayed in green; when no altitude or oxygen concentration information is received, the corresponding position is displayed as - -; This is the oxygen system switch button: click to turn the oxygen concentrator on or off. The first time it is turned on, the default forest oxygen cabin mode and the flow rate are medium. Subsequent turns on will run according to the previously memorized state. Select the oxygen chamber mode: Four oxygen chamber modes are available: Forest / Highland / Oxygen Therapy / Emergency, corresponding to different oxygen concentrations. When selecting Forest / Highland / Oxygen Therapy mode, only oxygen outlets A / B are open, and oxygen outlet C is closed. When selecting Emergency mode, you must first confirm whether an oxygen mask is inserted into oxygen outlet C. If an oxygen mask is inserted, the system will directly enter Emergency mode, and oxygen outlets A / B of port C will be closed. Otherwise, only a pop-up window will prompt "Please insert a breathing mask", and other states will remain unchanged. Select the oxygen outlet flow rate: click to switch between low / medium / high flow rate. The three gears are mutually exclusive. If one is selected, the others will be unselected.

[0050] For oxygen outlet position selection: support three oxygen outlet position options: shared by the whole car / exclusive for the front row / exclusive for the back row. In forest / plateau / oxygen therapy mode, click all a / b oxygen outlets in the whole car to turn on oxygen. Click front row exclusive to turn on oxygen only from the front row a oxygen outlet. Click front row exclusive to turn on oxygen only from the front b oxygen outlet. When the emergency mode is turned on, the oxygen outlet position selection is grayed out and inoperable.

[0051] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A split-type vehicle-mounted intelligent oxygen supply system based on VPSA technology, characterized in that: include: An air compressor is arranged on the inner side of the rear wheel guard plate of the vehicle and is used to compress the air and discharge it to the molecular sieve assembly; The molecular sieve assembly is installed under the spare tire in the trunk of the vehicle and is used to separate nitrogen and oxygen from the air to produce oxygen; The oxygen supply pipe is installed on the inside of the vehicle roof and is connected to the oxygen outlet of the molecular sieve assembly. The oxygen supply pipe is provided with an oxygen outlet above each seat; The detection module includes an altitude sensor and an oxygen concentration sensor. The altitude sensor is installed on the molecular sieve assembly, and the oxygen concentration sensor is set on the ceiling in the vehicle compartment.

2. The split-type vehicle-mounted intelligent oxygen supply system based on VPSA technology according to claim 1, characterized in that: The molecular sieve assembly includes two molecular sieve tanks, both of which are filled with molecular sieves. One molecular sieve tank adsorbs nitrogen in the air and discharges oxygen, and the other molecular sieve tank desorbs nitrogen in the molecular sieve. The two molecular sieve tanks work alternately.

3. The split-type vehicle-mounted intelligent oxygen supply system based on VPSA technology according to claim 2 is characterized in that: The air compressor adopts a four-cylinder compressor, wherein two cylinders provide positive pressure to the molecular sieve tank to produce oxygen, and the other two cylinders provide negative pressure to another molecular sieve tank to desorb nitrogen.

4. The split-type vehicle-mounted intelligent oxygen supply system based on VPSA technology according to claim 1, characterized in that: The oxygen supply pipe is also provided with an emergency oxygen outlet, and an oxygen mask interface is provided at the emergency oxygen outlet. The oxygen mask interface is connected to the oxygen mask through a pipeline.

5. The split-type vehicle-mounted intelligent oxygen supply system based on VPSA technology according to claim 1, characterized in that: The air compressor is arranged in a sound-absorbing shell, and a heat dissipation fan is also arranged in the sound-absorbing shell.

6. The split-type vehicle-mounted intelligent oxygen supply system based on VPSA technology according to claim 1, characterized in that: It also includes a controller, which is electrically connected to the air compressor and the detection module. The controller is also connected to the vehicle ECU and interacts with the entire vehicle through a display screen inside the vehicle.

7. A control method for a split-type vehicle-mounted intelligent oxygen supply system based on VPSA technology according to any one of claims 1 to 6, characterized in that: include: Get the vehicle's current altitude and calculate the target oxygen concentration in the vehicle based on a preset piecewise function; Real-time monitoring of the oxygen concentration inside the vehicle. When the oxygen concentration approaches the target lower limit and the decay rate exceeds the threshold, the oxygen supply system is activated in advance. Select the corresponding working mode based on the difference between the target oxygen concentration and the actual oxygen concentration; When the oxygen concentration in the vehicle exceeds 28%, the oxygen supply system will be forced to shut down and the vehicle ventilation system will be activated.

8. The control method of the split-type vehicle-mounted intelligent oxygen supply system based on VPSA technology according to claim 7 is characterized in that: The preset piecewise function includes: When the altitude is ≤1500m, the target oxygen concentration = 21%; When the altitude is 1500m < ≤ 4000m, the target oxygen concentration = 21% + 0.001 × (altitude - 1500); When the altitude is greater than 4000m, the target oxygen concentration is 24.5%.

9. The control method of the split-type vehicle-mounted intelligent oxygen supply system based on VPSA technology according to claim 7, characterized in that: The working modes include forest mode, plateau mode and oxygen therapy mode; When the difference between the target oxygen concentration and the actual oxygen concentration is less than or equal to 1%, the forest mode is activated to provide low-flow oxygen. When the difference between the target oxygen concentration and the actual oxygen concentration is less than or equal to 1%, the plateau mode is activated and medium-flow oxygen supply is performed. When the difference between the target oxygen concentration and the actual oxygen concentration is greater than 2%, the oxygen therapy mode is activated and high-flow oxygen supply is performed.

10. The control method of the split-type vehicle-mounted intelligent oxygen supply system based on VPSA technology according to claim 9, characterized in that: An emergency mode is also included, in which oxygen is only discharged through the emergency oxygen outlet and a high flow rate of oxygen is output.

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