Efficient pressure swing adsorption oxygen generation system suitable for plateau environment

Abstract

The utility model discloses an efficient pressure swing adsorption oxygen generation system suitable for a plateau environment, and particularly relates to the technical field of pressure swing adsorption oxygen generation, which comprises a controller connected to an external power supply, an air compressor assembly, an electromagnetic valve assembly and a molecular sieve tower assembly, the controller is electrically connected with the air compressor assembly and the electromagnetic valve assembly through cables, the air filter is connected with an air inlet of the air compressor assembly through an air pipe, and the air inlet end of the cooler is connected with an air outlet of the air compressor assembly through an air pipe. A gas outlet of the molecular sieve tower assembly is connected with a gas inlet of the oxygen storage tank through a gas pipe. According to the utility model, the air compressor assembly is arranged, two groups of air compressors are adopted to realize automatic adjustment of the air quantity and pressure of an input air source in plain and plateau environments, the rated working voltage of the air compressors is AC12V, and the working frequency of the air compressors can be automatically adjusted according to the voltage of a control signal given by the controller, so that the air compressor can be automatically adjusted at the altitude of 4500 meters. The oxygen generation system is stable in oxygen generation performance.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure swing adsorption oxygen production, and more specifically, to a high-efficiency pressure swing adsorption oxygen production system suitable for plateau environments. Background Art

[0002] The molecular sieve pressure swing adsorption oxygen production technology is specifically known as: utilizing the different adsorption capacities of molecular sieves for oxygen and nitrogen under a certain pressure, separating nitrogen and oxygen in the air by changing pressure parameters, and enriching more than 90% of oxygen-rich gas; among them, the molecular sieve pressure swing adsorption method has been widely used in medical oxygen supply, aviation oxygen supply, plateau oxygen supply and civil oxygen therapy and health care due to its advantages of low energy consumption, simple equipment, flexible operation, high degree of automation and low operating cost; the performance of molecular sieves and air compressors, the core components of the pressure swing adsorption oxygen production system, is greatly affected by environmental factors: in the low-pressure environment of the plateau, as the altitude increases, the air pressure decreases, the intake pressure decreases, and the exhaust pressure of the air compressor decreases; among them, the best adsorption pressure of the known molecular sieve is 0.15MPa. If it deviates from the best adsorption pressure range, the oxygen production rate of the molecular sieve decreases, which will cause the oxygen production performance of the oxygen production system to decrease; according to experimental studies, for every 1,000 meters increase in altitude, the mass exhaust volume of the air compressor decreases by 12%. It can be seen that the air compressors used on the plateau generally have problems such as insufficient exhaust pressure and easy damage.

[0003] At present, in actual use, due to the large-scale application of molecular sieve oxygen concentrators in plateau areas at an altitude of 4,500 meters, there is a problem that the oxygen production performance of the oxygen concentrator does not meet the standards, and conventional oxygen concentrators mostly use 220-volt AC power. For people who go to the plateau for self-driving tours and mobile operations, it is difficult to provide 220-volt AC power, and thus the use of conventional oxygen concentrators is restricted. As a result, self-driving tours and mobile personnel in the plateau mostly use oxygen cylinders for oxygen supply, which leads to high oxygen supply costs and inability to continuously supply oxygen for a long time. Therefore, a high-efficiency pressure swing adsorption oxygen production system suitable for plateau environments is proposed as a further improvement, so that the oxygen production performance of the oxygen concentrator at an altitude of 4,500 meters on the plateau is not reduced, and the product can be powered by 24 volts DC, thereby meeting the vehicle power supply use, effectively solving the problem of oxygen inhalation for vehicle passengers in the low-pressure environment of the plateau. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, an embodiment of the utility model provides a high-efficiency pressure swing adsorption oxygen production system suitable for plateau environments to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above purpose, the utility model provides the following technical solutions: a high-efficiency pressure swing adsorption oxygen production system suitable for plateau environments, comprising: an air filter, a cooler, an oil-water separator, an air tank, an oxygen storage tank, a pressure regulating valve, a flow meter, a muffler and a fan,

[0006] The air outlet of the cooler is connected to the air inlet of the oil-water separator through an air pipe, and the air outlet of the oil-water separator is connected to the air inlet of the air tank through an air pipe;

[0007] The oxygen storage tank is connected to the pressure regulating valve through an air pipe, the pressure regulating valve is connected to a flow meter through an air pipe, and the air outlet end of the flow meter is set as the oxygen outlet end;

[0008] The system also includes: a controller connected to an external power supply, an air compressor assembly, a solenoid valve assembly, a molecular sieve tower assembly and a one-way valve assembly;

[0009] The controller is electrically connected to the air compressor assembly, the fan and the solenoid valve assembly, the pressure regulating valve and the flow meter through cables, the air filter is connected to the air inlet of the air compressor assembly through an air pipe, and the air inlet end of the cooler is connected to the air outlet of the air compressor assembly through an air pipe;

[0010] The air outlet of the air tank is connected to the air inlet of the solenoid valve assembly through an air pipe, the air outlet of the solenoid valve assembly is connected to the air inlet of the molecular sieve tower assembly through an air pipe, the nitrogen exhaust port of the solenoid valve assembly is connected to the air inlet of the muffler through an air pipe, and the air outlet of the muffler is set as a nitrogen exhaust end;

[0011] The air outlet of the molecular sieve tower assembly is connected to the air inlet of the oxygen storage tank through an air pipe, and the one-way valve assembly is arranged on the air pipe connecting the molecular sieve tower assembly to the oxygen storage tank.

[0012] Further, the air compressor assembly includes: a first air compressor and a second air compressor;

[0013] The first air compressor and the second air compressor are both electrically connected to the controller via cables;

[0014] The air filter is connected to the air inlet of the first air compressor and the second air compressor through an air pipe respectively; the air inlet end of the cooler is connected to the air outlet of the first air compressor and the second air compressor through an air pipe respectively.

[0015] Furthermore, the molecular sieve tower assembly includes: adsorption tower A, adsorption tower B, adsorption tower C, and adsorption tower D;

[0016] The solenoid valve assembly comprises: a first solenoid valve and a second solenoid valve;

[0017] The one-way valve assembly comprises: a first one-way valve and a second one-way valve;

[0018] The air outlet of the air tank is connected to the air inlet of the first solenoid valve and the second solenoid valve through an air pipe, the air outlet of the first solenoid valve is connected to the air inlet of the adsorption tower A and the adsorption tower B through an air pipe, the air outlet of the second solenoid valve is connected to the air inlet of the adsorption tower C and the adsorption tower D through an air pipe, and the nitrogen exhaust ports of the first solenoid valve and the second solenoid valve are connected to the muffler through an air pipe.

[0019] The gas outlets of the adsorption tower A and the adsorption tower B are connected to the gas inlet end of the first one-way valve through the gas pipe, and the gas outlet end of the first one-way valve is connected to the gas inlet end of the oxygen storage tank through the gas pipe.

[0020] The gas outlets of the adsorption towers C and D are connected to the gas inlet end of the second one-way valve through an air pipe, and the gas outlet end of the second one-way valve is connected to the gas inlet of the oxygen storage tank through an air pipe.

[0021] Furthermore, the system further comprises: a throttle valve, and the air inlet ends of the first one-way valve and the second one-way valve are connected via the throttle valve.

[0022] Furthermore, the fan and the cooler are integrated into one.

[0023] Furthermore, the material of the air filter is set to be a composite polymer material.

[0024] Furthermore, the air pressure in the air tank is set at 0.18-0.25 MPa.

[0025] Technical effects and advantages of the utility model:

[0026] 1. Compared with the prior art, by setting up an air compressor assembly, two groups of air compressors are used to realize automatic adjustment of the input gas volume and pressure in plain and plateau environments. The air compressor uses a rated working voltage of AC12V, which has high safety and good reliability. The working frequency of the air compressor can be automatically adjusted according to the control signal voltage given by the controller to increase or decrease the exhaust volume, which solves the problem that the exhaust volume of traditional compressors cannot be adjusted, solves the problem that mobile personnel cannot continuously breathe oxygen for a long time, and solves the problem of insufficient exhaust volume affected by the low air pressure on the plateau, and realizes the stable oxygen production performance of the oxygen production system at an altitude of 4500 meters.

[0027] 2. Compared with the existing technology, by setting up the molecular sieve tower assembly, the equivalent molecular sieve tower height-to-diameter ratio is increased without changing the molecular sieve tower height and molecular sieve filling volume, thereby improving the oxygen production system's nitrogen and oxygen separation efficiency and oxygen recovery rate, achieving high-efficiency pressure swing adsorption oxygen production. The system can be used for oxygen inhalation by personnel who urgently enter the plateau, mobile workers who have been in the plateau for a long time, and plateau self-driving enthusiasts, effectively broadening the application scope of the molecular sieve pressure swing adsorption oxygen production system. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0029] The accompanying drawings are marked as follows:

[0030] 1. Air filter; 2. Cooler; 3. Oil-water separator; 4. Air tank; 5. Oxygen storage tank;

[0031] 6. Pressure regulating valve; 7. Flow meter; 8. Muffler; 9. Fan; 10. Controller;

[0032] 11. air compressor assembly; 111. first air compressor; 112. second air compressor;

[0033] 12. Solenoid valve assembly; 121. First solenoid valve; 122. Second solenoid valve;

[0034] 13. Molecular sieve tower assembly;

[0035] 131. Adsorption tower A; 132. Adsorption tower B; 133. Adsorption tower C; 134. Adsorption tower D;

[0036] 14. One-way valve assembly; 141. First one-way valve; 142. Second one-way valve;

[0037] 15. Throttle valve. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0039] As attached Figure 1 The high-efficiency pressure swing adsorption oxygen production system suitable for plateau environment shown in the figure includes: an air filter 1, a cooler 2, an oil-water separator 3, an air tank 4, an oxygen storage tank 5, a pressure regulating valve 6, a flow meter 7, a muffler 8 and a fan 9;

[0040] Among them, each system component adopts modular and integrated design, reasonable layout, and makes full use of the gaps between different components to arrange air pipes and cables, effectively saving the overall space of the oxygen production system product and reducing the volume and weight of the oxygen production system product;

[0041] The system further includes: a controller 10 connected to an external power supply, an air compressor assembly 11, a solenoid valve assembly 12, a molecular sieve tower assembly 13 and a one-way valve assembly 14;

[0042] The controller 10 is electrically connected to the air compressor assembly 11, the fan 9, the solenoid valve assembly 12, the pressure regulating valve 6 and the flow meter 7 through cables.

[0043] The air filter 1 is connected to the air inlet of the air compressor assembly 11 through an air pipe.

[0044] The air outlet of the air compressor assembly 11 is connected to the air inlet end of the cooler 2 through an air pipe;

[0045] The air outlet of the cooler 2 is connected to the air inlet of the oil-water separator 3 through an air pipe.

[0046] The air outlet of the oil-water separator 3 is connected to the air inlet end of the air tank 4 through an air pipe;

[0047] The air outlet of the air tank 4 is connected to the air inlet of the solenoid valve assembly 12 through an air pipe.

[0048] The gas outlet of the solenoid valve assembly 12 is connected to the gas inlet of the molecular sieve tower assembly 13 through an air pipe, and the nitrogen exhaust port of the solenoid valve assembly 12 is connected to the gas inlet end of the muffler 8 through an air pipe, and the gas outlet end of the muffler 8 is set as a nitrogen exhaust end;

[0049] The gas outlet of the molecular sieve tower assembly 13 is connected to the gas inlet of the oxygen storage tank 5 through an air pipe, and the one-way valve assembly 14 is arranged on the air pipe connecting the molecular sieve tower assembly 13 to the oxygen storage tank 5;

[0050] The oxygen storage tank 5 is connected to the pressure regulating valve 6 through an air pipe, and the pressure regulating valve 6 is connected to the flow meter 7 through an air pipe, and the air outlet end of the flow meter 7 is set as the oxygen outlet end;

[0051] Among them, the flow meter 7 is used to adjust the size of the oxygen production flow rate. The output oxygen production flow rate of this system is set to 15L / min, and the oxygen production flow rate can be adjusted according to the actual demand during use;

[0052] Among them, the oxygen storage tank 5, the pressure regulating valve 6, and the flow meter 7 are connected in sequence through air pipes. The oxygen in the oxygen storage tank 5 is depressurized to the required value for use and output through the pressure regulating valve 6. The oxygen outlet pressure of this system is set to 0.05MPa, and the oxygen outlet pressure can be adjusted according to the actual demand during use;

[0053] The pressurized high-temperature gas is cooled by the cooler 2, and the water and oil generated in the process are separated by the mechanical oil-water separator 3. When the water collected inside the oil-water separator 3 reaches a certain amount, it is automatically discharged to ensure that the air entering the air tank 4 is dry, thereby reducing the water entering the molecular sieve tower assembly 13 and improving the oxygen production rate of the molecular sieve of the molecular sieve tower assembly 13.

[0054] Among them, since the air outlet of the oil-water separator 3 is connected to the air tank 4 through the air pipe, the air tank 4 acts as a buffer gas, and the clean and dry pressurized air is stored in the air tank 4. The operation and speed of the air compressor assembly 11 are controlled by the controller 10 to ensure that the air pressure in the air tank 4 is maintained within the design value range of 0.18 to 0.25 MPa;

[0055] Embodiment of air compressor assembly 11: Figure 1 As shown,

[0056] The air compressor assembly 11 includes: a first air compressor 111 and a second air compressor 112;

[0057] The first air compressor 111 and the second air compressor 112 are both electrically connected to the controller 10 via cables;

[0058] The air filter 1 is connected to the air inlets of the first air compressor 111 and the second air compressor 112 through air pipes; the air inlet end of the cooler 2 is connected to the air outlets of the first air compressor 111 and the second air compressor 112 through air pipes.

[0059] The air compressor assembly 11 uses a brushless DC motor with a rated working voltage of AC12V. The working frequency of the air compressor assembly 11 can be automatically adjusted according to the control signal voltage given by the controller 10, so that the exhaust volume of the air compressor assembly 11 is automatically adjusted.

[0060] The air compressor assembly 11 includes two air compressors with different rated exhaust volumes. Since the first air compressor 111 and the second air compressor 112 are electrically connected to the controller 10 via cables, the first air compressor 111 continuously operates to output pressurized gas at different altitudes. When the controller 10 monitors that the ambient atmospheric pressure is lower than 70 kPa, that is, the altitude is above 3,000 meters, the controller 10 controls the second air compressor 112 to start working and output pressurized gas to compensate for the insufficient exhaust pressure and exhaust volume of the first air compressor 111 caused by the increase in altitude.

[0061] Embodiments of the solenoid valve assembly 12, the molecular sieve tower assembly 13 and the one-way valve assembly 14: Figure 1 As shown,

[0062] The molecular sieve tower assembly 13 includes: an adsorption tower A131, an adsorption tower B132, an adsorption tower C133, and an adsorption tower D134;

[0063] The solenoid valve assembly 12 includes: a first solenoid valve 121 and a second solenoid valve 122;

[0064] Among them, the solenoid valve assembly 12 uses a two-position three-way solenoid valve; since the solenoid valve assembly 12 is connected to the controller 10 through a cable, the controller 10 sets the on-off time of the solenoid valve assembly 12 to control the air in the air tank 4 to enter the molecular sieve tower assembly 13. This system sets the on time of the solenoid valve assembly 12 to 12 seconds and the off time to 10 seconds.

[0065] The one-way valve assembly 14 includes: a first one-way valve 141 and a second one-way valve 142;

[0066] The air outlet end of the air tank 4 is connected to the air inlets of the first solenoid valve 121 and the second solenoid valve 122 through the air pipe, the air outlet of the first solenoid valve 121 is connected to the air inlets of the adsorption tower A131 and the adsorption tower B132 through the air pipe, the air outlet of the second solenoid valve 122 is connected to the air inlets of the adsorption tower C133 and the adsorption tower D134 through the air pipe, and the nitrogen exhaust ports of the first solenoid valve 121 and the second solenoid valve 122 are connected to the muffler 8 through the air pipe;

[0067] The muffler 8 is connected to the nitrogen exhaust ports of the first solenoid valve 121 and the second solenoid valve 122 through an air pipe to reduce the airflow noise generated when exhausting nitrogen.

[0068] The air outlets of adsorption tower A131 and adsorption tower B132 are connected to the air inlet end of the first one-way valve 141 through an air pipe, the air outlet end of the first one-way valve 141 is connected to the air inlet end of the oxygen storage tank 5 through an air pipe, the air outlets of adsorption tower C133 and adsorption tower D134 are connected to the air inlet end of the second one-way valve 142 through an air pipe, and the air outlet end of the second one-way valve 142 is connected to the air inlet end of the oxygen storage tank 5 through an air pipe.

[0069] The system further includes a throttle valve 15 , through which the air inlet ends of the first one-way valve 141 and the second one-way valve 142 are connected.

[0070] The throttle valve 15 is designed as a vent with a fixed aperture, which is fixed in the air pipe connecting the oxygen outlet ends of the adsorption tower A131, the adsorption tower B132, the adsorption tower C133 and the adsorption tower D134, and completes the connection of the molecular sieve tower assembly 13, allowing a small amount of oxygen to pass through, so as to achieve nitrogen purge during molecular sieve desorption, improve the regeneration efficiency of the molecular sieve and the recovery rate of oxygen, and achieve efficient oxygen production;

[0071] The detailed working principle of the system is as follows:

[0072] The first solenoid valve 121 controls the pressurized gas in the air tank 4 to enter the adsorption tower A131 and the adsorption tower B132 at the same time, and the second solenoid valve 122 controls the pressurized gas in the air tank 4 to enter the adsorption tower C133 and the adsorption tower D134 at the same time; when the pressurized gas flows into the adsorption tower A131 and the adsorption tower B132, the molecular sieves in the adsorption tower A131 and the adsorption tower B132 adsorb nitrogen, most of the oxygen-rich gas enters the oxygen storage tank 5 through the first one-way valve 141, and a small amount of oxygen-rich gas enters the adsorption tower C133 and the adsorption tower D134 through the throttle valve 15, and the nitrogen in the adsorption tower C133 and the adsorption tower D134 is purged and desorbed; at this time, the nitrogen exhaust path of the second solenoid valve 122 is opened, and the nitrogen adsorbed in the adsorption tower C133 and the adsorption tower D134 passes through the second solenoid valve 122 and is discharged through the muffler 8;

[0073] When the power-on time of the first solenoid valve 121 reaches the set value, it is immediately closed, and the second solenoid valve 122 is powered on and opened. The air in the air tank 4 enters the adsorption tower C133 and the adsorption tower D134 through the second solenoid valve 122, and the molecular sieves in the adsorption tower C133 and the adsorption tower D134 adsorb nitrogen. Most of the oxygen-rich gas enters the oxygen storage tank 5 through the second one-way valve 142, and a small amount of oxygen-rich gas enters the adsorption tower A131 and the adsorption tower B132 through the throttle valve 15, and the nitrogen in the adsorption tower A131 and the adsorption tower B132 is purged and desorbed. At this time, the nitrogen exhaust path of the first solenoid valve 121 is opened, and the nitrogen adsorbed in the adsorption tower A131 and the adsorption tower B132 passes through the second solenoid valve 122 and is discharged through the muffler 8.

[0074] In a preferred embodiment, as shown in the attached Figure 1 As shown, the fan 9 and the cooler 2 are integrated into one.

[0075] Among them, the fan 9 uses an adjustable speed fan, and the fan 9 is connected to the controller 10 through a cable. The operation of the fan 9 is controlled by the controller 10. The controller 10 detects the ambient temperature. When the detected temperature is lower than 5°C, the fan 9 does not work. When the detected temperature is within the range of 5 to 40°C, the fan 9 works at the rated speed. When the detected temperature is higher than 40°C, the fan 9 works at the highest speed, thereby ensuring that the temperature of the gas entering the molecular sieve tower assembly 13 is within the optimal adsorption and decomposition temperature range of the molecular sieve; at the same time, in order to improve the heat dissipation effect at high temperature, the system integrates the fan 9 and the cooler 2 in the air duct;

[0076] Among them, cooler 2 uses an aluminum fin radiator, which increases the heat dissipation area through the aluminum fins and improves the cooling effect on the high-temperature gas;

[0077] In a preferred embodiment, as shown in the attached Figure 1As shown, the material of the air filter 1 is set to a composite polymer material, so that the air filter 1 can effectively filter out dust and fine particles in the air, thereby ensuring that the air entering the air compressor assembly 11 is clean;

[0078] In a preferred embodiment, as shown in the attached Figure 1 As shown, the air pressure in the air tank 4 is set at 0.18-0.25 MPa to ensure that the air pressure in the air tank 4 remains within the designed range.

[0079] Working principle of the utility model: when the controller 10 is connected to an external DC 24V power supply, the oxygen production system controller 10 is powered on and works, and the controller 10 self-checks and monitors the ambient atmospheric pressure and ambient temperature, and controls the air compressor assembly 11, the solenoid valve assembly 12, and the fan 9 respectively, and makes them work according to the set program.

[0080] At this time, the air passes through the air filter 1 to filter out dust and other impurities and then enters the air compressor assembly 11. The air is pressurized into high-temperature air of a certain pressure by the first air compressor 111 and the second air compressor 112 of the air compressor assembly 11. The pressurized high-temperature gas enters the cooler 2 for cooling and then enters the oil-water separator 3. The oil and water generated by cooling are separated by the oil-water separator 3. The filtered pressurized air enters the air tank 4 for buffering. The buffered high-pressure air enters the molecular sieve tower assembly 13 under the control of the solenoid valve assembly 12. After adsorption and desorption of the molecular sieve, most of the oxygen enters the oxygen storage tank 5 through the one-way valve assembly 14, and a small amount of oxygen passes through the throttle valve 15 to back-blow and desorb the molecular sieve tower assembly 13. The desorbed nitrogen is discharged out of the system after being silenced by the muffler 8. The oxygen in the oxygen storage tank 5 is output after being reduced in pressure by the pressure regulating valve 6 and limited in flow by the flow meter 7 for oxygen inhalation by the occupants of the vehicle.

[0081] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0082] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency pressure swing adsorption oxygen production system suitable for plateau environments, comprising: air filter (1), cooler (2), oil-water separator (3), air tank (4), oxygen storage tank (5), pressure regulating valve (6), flow meter (7), muffler (8) and fan (9), The air outlet of the cooler (2) is connected to the air inlet of the oil-water separator (3) through an air pipe, and the air outlet of the oil-water separator (3) is connected to the air inlet of the air tank (4) through an air pipe; The oxygen storage tank (5) is connected to the pressure regulating valve (6) through an air pipe, the pressure regulating valve (6) is connected to the flow meter (7) through an air pipe, and the air outlet end of the flow meter (7) is set as the oxygen outlet end; Features: The system further comprises: a controller (10) connected to an external power source, an air compressor assembly (11), a solenoid valve assembly (12), a molecular sieve tower assembly (13) and a one-way valve assembly (14); The controller (10) is electrically connected to the air compressor assembly (11), the fan (9) and the solenoid valve assembly (12), the pressure regulating valve (6) and the flow meter (7) through cables, the air filter (1) is connected to the air inlet of the air compressor assembly (11) through an air pipe, and the air inlet end of the cooler (2) is connected to the air outlet of the air compressor assembly (11) through an air pipe; The air outlet of the air tank (4) is connected to the air inlet of the electromagnetic valve assembly (12) through an air pipe, the air outlet of the electromagnetic valve assembly (12) is connected to the air inlet of the molecular sieve tower assembly (13) through an air pipe, the nitrogen exhaust port of the electromagnetic valve assembly (12) is connected to the air inlet end of the muffler (8) through an air pipe, and the air outlet end of the muffler (8) is set as a nitrogen exhaust end; The gas outlet of the molecular sieve tower assembly (13) is connected to the gas inlet of the oxygen storage tank (5) through an air pipe, and the one-way valve assembly (14) is arranged on the air pipe connecting the molecular sieve tower assembly (13) to the oxygen storage tank (5).

2. According to claim 1, a high-efficiency pressure swing adsorption oxygen production system suitable for plateau environments is characterized by: The air compressor assembly (11) comprises: a first air compressor (111) and a second air compressor (112); The first air compressor (111) and the second air compressor (112) are both electrically connected to the controller (10) via cables; The air filter (1) is connected to the air inlets of the first air compressor (111) and the second air compressor (112) respectively through air pipes; the air inlet end of the cooler (2) is connected to the air outlets of the first air compressor (111) and the second air compressor (112) respectively through air pipes.

3. The high-efficiency pressure swing adsorption oxygen production system suitable for plateau environments according to claim 1 is characterized by: The molecular sieve tower assembly (13) comprises: an adsorption tower A (131), an adsorption tower B (132), an adsorption tower C (133), and an adsorption tower D (134); The solenoid valve assembly (12) comprises: a first solenoid valve (121) and a second solenoid valve (122); The one-way valve assembly (14) comprises: a first one-way valve (141) and a second one-way valve (142); The air outlet of the air tank (4) is connected to the air inlets of the first solenoid valve (121) and the second solenoid valve (122) through an air pipe, respectively; the air outlet of the first solenoid valve (121) is connected to the air inlets of the adsorption tower A (131) and the adsorption tower B (132) through an air pipe, respectively; the air outlet of the second solenoid valve (122) is connected to the air inlets of the adsorption tower C (133) and the adsorption tower D (134) through an air pipe, respectively; and the nitrogen exhaust ports of the first solenoid valve (121) and the second solenoid valve (122) are connected to the muffler (8) through an air pipe. The gas outlets of the adsorption tower A (131) and the adsorption tower B (132) are connected to the gas inlet end of the first one-way valve (141) through the gas pipe, and the gas outlet end of the first one-way valve (141) is connected to the gas inlet end of the oxygen storage tank (5) through the gas pipe. The gas outlets of the adsorption tower C (133) and the adsorption tower D (134) are connected to the gas inlet end of the second one-way valve (142) through an air pipe, and the gas outlet end of the second one-way valve (142) is connected to the gas inlet of the oxygen storage tank (5) through an air pipe.

4. The high-efficiency pressure swing adsorption oxygen production system suitable for plateau environments according to claim 3 is characterized by: The system further comprises a throttle valve (15), wherein the air inlet ends of the first one-way valve (141) and the second one-way valve (142) are connected via the throttle valve (15).

5. The high-efficiency pressure swing adsorption oxygen production system suitable for plateau environments according to claim 1 is characterized by: The fan (9) and the cooler (2) are integrated into one.

6. The high-efficiency pressure swing adsorption oxygen production system suitable for plateau environments according to claim 1 is characterized by: The material of the air filter (1) is set to be a composite polymer material.

7. The high-efficiency pressure swing adsorption oxygen production system suitable for plateau environments according to claim 1 is characterized by: The air pressure in the air tank (4) is set at 0.18-0.25 MPa.

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