Dispersion type oxygen supply equipment for indoor space in plateau area

Abstract

The invention relates to the technical field of oxygen supply equipment, in particular to dispersion type oxygen supply equipment for an indoor space in a plateau area. The oxygen supply equipment aims to solve the technical problems that in the prior art, a molecular sieve is prone to being smashed, and the molecular sieve is prone to being contaminated by oil in an oil environment. According to the technical scheme, the diffuse type oxygen supply equipment for the indoor space in the plateau area comprises a first air filter; the system further comprises a second air filter, a first vacuum supercharger, a first adsorption tower, a second vacuum supercharger, a second adsorption tower, a first oxygen buffer tank, an oxygen supercharger, a high-pressure oxygen buffer tank and a precise air filter. According to the pressure swing adsorption principle, the molecular sieve adsorbs during pressurization and desorbs during depressurization, in order to make desorption of the molecular sieve more thorough, a vacuum negative pressure system is designed, in the desorption stage, nitrogen can be rapidly discharged, the working efficiency is improved, a homogeneous program and a backflow buffer structure are originally created, the oxygen production efficiency is high, and the oxygen production purity is high.

Description

Technical Field

[0001] The present invention relates to the technical field of oxygen supply equipment, and in particular to a dispersed oxygen supply equipment for indoor spaces in plateau areas. Background Art

[0002] The most important factor affecting the human body in the plateau environment is hypoxia. Plateau oxygen supply is a livelihood project to improve the living standards of people in plateau areas and ensure the physical health of people in plateau areas. Existing plateau oxygen generation equipment is basically PSA oxygen generation equipment. PSA equipment occupies a large area, requires the construction of rooms, has high energy consumption, short service life of internal molecular sieves, poor stability, and high maintenance costs. Traditional oxygen generation equipment is high-pressure and oil-designed. Under long-term high-pressure operation, the molecular sieves are easily crushed, and in an oil environment, the molecular sieves are easily contaminated by oil, so the molecular sieves need to be replaced frequently. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a dispersed oxygen supply equipment for indoor spaces in plateau areas, which aims to solve the technical problems that the molecular sieves are easily crushed and are easily contaminated by oil in an oil environment in the prior art.

[0004] The technical solution of the present invention is as follows: A dispersed oxygen supply device for indoor spaces in plateau areas, comprising a first air filter; further comprising a second air filter, a first vacuum booster, a first adsorption tower, a second vacuum booster, a second adsorption tower, a first oxygen buffer tank, an oxygen booster, a high-pressure oxygen buffer tank, a precision air filter, a first intake pipe, a second intake pipe, a first exhaust muffler, a second exhaust muffler, a first connecting pipe, a second connecting pipe, a first oxygen pipe, a second oxygen pipe, a booster intake pipe, a booster outlet pipe, a filtered supply pipe, a return pipe, a first ventilation pipe and a second ventilation pipe; the first vacuum booster and the first adsorption tower are sequentially installed on the right side of the first air filter; the second vacuum booster and the second adsorption tower are sequentially installed on the right side of the second air filter; the first oxygen buffer tank, the oxygen booster and the high-pressure oxygen buffer tank are sequentially installed on the right side of the first adsorption tower and the second adsorption tower; the precision air filter is installed on the front side of the high-pressure oxygen buffer tank; the first intake pipe is installed between the first air filter and the first vacuum booster; the second intake pipe is installed between the second air filter and the second vacuum booster; the first exhaust muffler is installed on the front side of the first vacuum booster; the second exhaust muffler is installed on the rear side of the second vacuum booster; the first connecting pipe is installed between the first vacuum booster and the first adsorption tower; the second connecting pipe is installed between the second vacuum booster and the second adsorption tower; the first oxygen pipe and the second oxygen pipe are respectively installed between the first adsorption tower, the second adsorption tower and the first oxygen buffer tank; the booster intake pipe is installed between the first oxygen buffer tank and the oxygen booster; the booster outlet pipe is installed between the oxygen booster and the high-pressure oxygen buffer tank; the filtered supply pipe is installed between the high-pressure oxygen buffer tank and the precision air filter; the return pipe is installed between the filtered supply pipe and the first oxygen buffer tank; the first ventilation pipe is installed between the first vacuum booster and the first exhaust muffler; the second ventilation pipe is installed between the second vacuum booster and the second exhaust muffler.

[0005] Preferably, front adsorption: After the air is dust-removed, oil-removed and dried by the first air filter, it is sent into the first vacuum booster through the first intake pipe. After being boosted by the first vacuum booster, it enters the first adsorption tower through the first connecting pipe. The pressure in the first adsorption tower increases, and the nitrogen molecules in the compressed air are adsorbed. The unadsorbed oxygen passes through the adsorption bed, and the oxygen enters the first oxygen buffer tank through the first oxygen pipe. This process lasts for dozens of seconds;

[0006] Pressure equalization: After the front adsorption process ends, the first adsorption tower and the second adsorption tower are connected through an equalizing valve to make the pressures of the two towers balanced. This process is called "pressure equalization" and lasts for 3-5 seconds;

[0007] Post - suction: After the pressure equalization is completed, the compressed air passes through the second air filter for dust removal, oil removal, and drying, and then is sent into the second vacuum booster through the second air inlet pipe. After being boosted by the second vacuum booster, it enters the second adsorption tower through the second connecting pipe. The pressure of the second adsorption tower increases, and the nitrogen molecules in the compressed air are adsorbed. The unadsorbed oxygen passes through the adsorption bed and enters the first oxygen buffer tank from the second oxygen pipe. This process lasts for dozens of seconds.

[0008] Desorption: It is carried out synchronously with the post - suction. The nitrogen adsorbed in the first adsorption tower is released back into the atmosphere by reducing the pressure. The first exhaust muffler plays a role in silencing. This process is called desorption. Conversely, when the second adsorption tower is adsorbing, the first adsorption tower is also desorbing at the same time.

[0009] After the post - suction is completed, the pressure equalization process is entered, and then it is switched to the pre - suction process, and this cycle continues continuously, so as to continuously produce high - purity oxygen.

[0010] The oxygen in the first oxygen buffer tank is sent into the oxygen booster through the booster air inlet pipe, and then sent into the high - pressure oxygen buffer tank through the booster air outlet pipe. The oxygen in the high - pressure oxygen buffer tank is sent into the precision air filter through a part of the filtered air supply pipe for filtration and then used, and the other part returns to the first oxygen buffer tank through the return pipe.

[0011] Preferably, both the first air filter and the second air filter include a first filter cylinder body; a detachable first upper cover is installed at the upper end of the first filter cylinder body; a first filter basket and a second filter basket are installed successively from the inside to the outside at the upper end of the inner bottom of the first filter cylinder body; an annular groove is opened at the lower end of the first upper cover.

[0012] Preferably, a coupling and a shaft are rotatably connected inside the first filter cylinder body; a motor is installed at the lower end of the coupling and the shaft; reinforcing rods are symmetrically distributed on the left and right and fixedly connected between the motor and the first filter cylinder body; a cleaning assembly for cleaning the first filter basket is installed at the upper end of the coupling and the shaft.

[0013] Preferably, the cleaning assembly includes a frame; brushes are fixedly connected to both the left and right ends of the frame; limiting columns are symmetrically distributed on the left and right and fixedly connected to the upper end of the frame and are matched with the annular groove.

[0014] Preferably, both the first adsorption tower and the second adsorption tower include an adsorption tower body; a lower grid and an upper grid are installed successively from bottom to top inside the adsorption tower body; molecular sieves are filled between the lower grid and the upper grid; a detachable adsorption tower cover is installed at the upper end of the adsorption tower body.

[0015] Preferably, the precision air filter includes a second filter cylinder body; a first filter layer, a second filter layer, and a third filter layer are arranged successively from bottom to top inside the second filter cylinder body; a detachable second upper cover is installed at the upper end of the second filter cylinder body.

[0016] Preferably, the first filter layer, the second filter layer and the third filter layer are a HEPA filter, an activated carbon filter and a particulate filter respectively.

[0017] Preferably, the first adsorption tower and the second adsorption tower are connected by a pressure equalizing valve.

[0018] Preferably, both the first exhaust muffler and the second exhaust muffler include a muffler cylinder body; a detachable left end cover and a right end cover are respectively installed at the left and right ends of the muffler cylinder body; baffle plates are installed in the muffler cylinder body at equidistant intervals; sound pipes are inserted into the baffle plates; holes are provided on the surface of the sound pipes; the muffler cylinder body is welded by double-layer steel plates, with a sandwich layer left between them, and glass fiber or asbestos is filled in the sandwich layer.

[0019] Advantages of the present invention:

[0020] 1. According to the principle of pressure swing adsorption, the molecular sieve adsorbs under pressure and desorbs under reduced pressure. In order to make the desorption of the molecular sieve more thorough, a vacuum negative pressure system is designed. During the desorption stage, nitrogen can be quickly discharged, improving the working efficiency. An original equalizing program and a reflux buffer structure are adopted, with high oxygen production efficiency, high oxygen production purity, good operation stability of the equipment. The equipment can be modularly arranged according to transportation and installation requirements. The standard arrangement is the size of a 40-foot container, or it can be divided into two 20-foot containers.

[0021] 2. The present invention adopts an integrated modular design, which is convenient for free combination and assembly according to different spaces, with higher adaptability. By filtering the oil stains in the air, it effectively avoids the problem that the molecular sieve is easily contaminated by oil stains in an oily environment, reduces the replacement frequency of the molecular sieve, has low energy consumption, long service life of the internal molecular sieve, high stability and low maintenance cost. Brief Description of the Drawings

[0022] Figure 1 Shown is the first three-dimensional structure schematic diagram of the indoor space diffused oxygen supply device for high-altitude areas of the present invention;

[0023] Figure 2 Shown is the second three-dimensional structure schematic diagram of the indoor space diffused oxygen supply device for high-altitude areas of the present invention;

[0024] Figure 3 Shown is the cross-sectional structure schematic diagram of the second air filter in the indoor space diffused oxygen supply device for high-altitude areas of the present invention;

[0025] Figure 4 Shown is the three-dimensional structure schematic diagram of the cleaning component in the indoor space diffused oxygen supply device for high-altitude areas of the present invention;

[0026] Figure 5 Shown is the cross-sectional three-dimensional structure schematic diagram of the second adsorption tower in the indoor space diffused oxygen supply device for high-altitude areas of the present invention;

[0027] Figure 6 Shown is a schematic perspective sectional view of the precision air filter of the indoor space diffused oxygen supply device for high-altitude areas according to the present invention;

[0028] Figure 7 Shown is a schematic perspective view of the second exhaust muffler in the indoor space diffused oxygen supply device for high-altitude areas according to the present invention.

[0029] Description of reference numerals: 1, first air filter; 2, second air filter; 201, first filter cylinder body; 202, first upper cover; 203, first filter basket; 204, second filter basket; 205, annular groove; 206, coupling and shaft; 207, motor; 208, reinforcing rod; 209, cleaning assembly; 2091, frame; 2092, brush; 2093, limit post; 3, first vacuum booster; 4, first adsorption tower; 5, second vacuum booster; 6, second adsorption tower; 601, adsorption tower body; 602, lower grid; 603, upper grid; 604, molecular sieve; 605, adsorption tower cover; 7, first oxygen buffer tank; 8, oxygen booster; 9, high-pressure oxygen buffer tank; 10, precision air filter; 101, second filter cylinder body; 102, first filter layer; 103, second filter layer; 104, third filter layer; 105, second upper cover; 11, first intake pipe; 12, second intake pipe; 13, first exhaust muffler; 14, second exhaust muffler; 141, muffler cylinder body; 142, left end cover; 143, right end cover; 144, baffle plate; 145, sound pipe; 15, first connecting pipe; 16, second connecting pipe; 17, first oxygen pipe; 18, second oxygen pipe; 19, booster intake pipe; 20, booster outlet pipe; 21, filtered air supply pipe; 22, return pipe; 23, first ventilation pipe; 24, second ventilation pipe. Detailed implementation manners

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0031] Please refer to Figure 1-2, the present invention provides an embodiment: a diffused oxygen supply device for indoor spaces in plateau areas, including a first air filter 1; it also includes a second air filter 2, a first vacuum booster 3, a first adsorption tower 4, a second vacuum booster 5, a second adsorption tower 6, a first oxygen buffer tank 7, an oxygen booster 8, a high-pressure oxygen buffer tank 9, a precision air filter 10, a first intake pipe 11, a second intake pipe 12, a first exhaust muffler 13, a second exhaust muffler 14, a first connecting pipe 15, a second connecting pipe 16, a first oxygen pipe 17, a second oxygen pipe 18, a booster intake pipe 19, a booster outlet pipe 20, a filtered supply pipe 21, a return pipe 22, a first vent pipe 23, and a second vent pipe 24; the first vacuum booster 3 and the first adsorption tower 4 are sequentially installed on the right side of the first air filter 1; the second vacuum booster 5 and the second adsorption tower 6 are sequentially installed on the right side of the second air filter 2; the first oxygen buffer tank 7, the oxygen booster 8, and the high-pressure oxygen buffer tank 9 are sequentially installed on the right side of the first adsorption tower 4 and the second adsorption tower 6; the precision air filter 10 is installed on the front side of the high-pressure oxygen buffer tank 9; the first intake pipe 11 is installed between the first air filter 1 and the first vacuum booster 3; the second intake pipe 12 is installed between the second air filter 2 and the second vacuum booster 5; the first exhaust muffler 13 is installed on the front side of the first vacuum booster 3; the second exhaust muffler 14 is installed on the rear side of the second vacuum booster 5; the first connecting pipe 15 is installed between the first vacuum booster 3 and the first adsorption tower 4; the second connecting pipe 16 is installed between the second vacuum booster 5 and the second adsorption tower 6; the first oxygen pipe 17 and the second oxygen pipe 18 are respectively installed between the first adsorption tower 4, the second adsorption tower 6, and the first oxygen buffer tank 7; the booster intake pipe 19 is installed between the first oxygen buffer tank 7 and the oxygen booster 8; the booster outlet pipe 20 is installed between the oxygen booster 8 and the high-pressure oxygen buffer tank 9; the filtered supply pipe 21 is installed between the high-pressure oxygen buffer tank 9 and the precision air filter 10; the return pipe 22 is installed between the filtered supply pipe 21 and the first oxygen buffer tank 7; the first vent pipe 23 is installed between the first vacuum booster 3 and the first exhaust muffler 13; the second vent pipe 24 is installed between the second vacuum booster 5 and the second exhaust muffler 14; the first adsorption tower 4 and the second adsorption tower 6 are connected by an equalizing valve.

[0032] Please refer to Figure 3-5, in this embodiment, both the first air filter 1 and the second air filter 2 include a first filter cylinder body 201; a detachable first upper cover 202 is installed at the upper end of the first filter cylinder body 201; a first filter basket 203 and a second filter basket 204 are installed at the upper end of the inner bottom of the first filter cylinder body 201 in sequence from inside to outside; an annular groove 205 is opened at the lower end of the first upper cover 202; a coupling and shaft 206 are rotatably connected inside the first filter cylinder body 201; a motor 207 is installed at the lower end of the coupling and shaft 206; reinforcing rods 208 symmetrically distributed left and right are fixedly connected between the motor 207 and the first filter cylinder body 201; a cleaning assembly 209 for cleaning the first filter basket 203 is installed at the upper end of the coupling and shaft 206; the cleaning assembly 209 includes a frame 2091; brushes 2092 are fixedly connected to both the left and right ends of the frame 2091; limiting columns 2093 symmetrically distributed left and right and matching the annular groove 205 are fixedly connected to the upper end of the frame 2091; both the first adsorption tower 4 and the second adsorption tower 6 include an adsorption tower body 601; a lower grid 602 and an upper grid 603 are installed in the adsorption tower body 601 in sequence from bottom to top; molecular sieves 604 are filled between the lower grid 602 and the upper grid 603; a detachable adsorption tower cover 605 is installed at the upper end of the adsorption tower body 601.

[0033] Please refer to Figure 6-7 , in this embodiment, the precision air filter 10 includes a second filter cylinder body 101; a first filter layer 102, a second filter layer 103, and a third filter layer 104 are arranged in sequence from bottom to top inside the second filter cylinder body 101; a detachable second upper cover 105 is installed at the upper end of the second filter cylinder body 101; the first filter layer 102, the second filter layer 103, and the third filter layer 104 are a HEPA filter screen, an activated carbon filter screen, and a particulate matter filter screen respectively; both the first exhaust muffler 13 and the second exhaust muffler 14 include a muffler cylinder body 141; a detachable left end cover 142 and a right end cover 143 are installed at the left and right ends of the muffler cylinder body 141 respectively; equally spaced baffle plates 144 are installed inside the muffler cylinder body 141; sound pipes 145 are inserted into the baffle plates 144; holes are provided on the surface of the sound pipes 145; the muffler cylinder body 141 is welded by double-layer steel plates, with a sandwich layer left between them, and glass fiber or asbestos is filled in the sandwich layer.

[0034] During operation, for the front suction: After the air is dust-removed, oil-removed, and dried by the first air filter 1, it is sent into the first vacuum booster 3 through the first intake pipe 11. After being boosted by the first vacuum booster 3, it enters the first adsorption tower 4 through the first connecting pipe 15. The pressure in the first adsorption tower 4 increases, and the nitrogen molecules in the compressed air are adsorbed. The unadsorbed oxygen passes through the adsorption bed, and the oxygen enters the first oxygen buffer tank 7 from the first oxygen pipe 17. This process lasts for dozens of seconds;

[0035] Equalization: After the forward adsorption process ends, the first adsorption tower 4 and the second adsorption tower 6 are connected through the equalization valve to equalize the pressures of the two towers. This process is called "equalization" and lasts for 3 - 5 seconds.

[0036] Backward adsorption: After equalization, the compressed air passes through the second air filter 2 for dust removal, oil removal, and drying, and then is sent into the second vacuum booster 5 through the second inlet pipe 12. After being boosted by the second vacuum booster 5, it enters the second adsorption tower 6 through the second connecting pipe 16. The pressure of the second adsorption tower 6 increases, and the nitrogen molecules in the compressed air are adsorbed. The unadsorbed oxygen passes through the adsorption bed, and the oxygen enters the first oxygen buffer tank 7 from the second oxygen pipe 18. This process lasts for dozens of seconds.

[0037] Desorption: Synchronous with backward adsorption, the nitrogen adsorbed in the first adsorption tower 4 is released back into the atmosphere by reducing the pressure. The first exhaust muffler 13 plays a role in silencing. This process is called desorption. Conversely, when the second adsorption tower 6 is adsorbing, the first adsorption tower 4 is also desorbing.

[0038] After the backward adsorption ends, the equalization process is entered, and then it switches to the forward adsorption process, and it keeps cycling continuously, so as to continuously produce high-purity oxygen.

[0039] The oxygen in the first oxygen buffer tank 7 is sent into the oxygen booster 8 through the booster inlet pipe 19, and then is sent into the high-pressure oxygen buffer tank 9 through the booster outlet pipe 20. Part of the oxygen in the high-pressure oxygen buffer tank 9 is sent into the precision air filter 10 through the filtered supply pipe 21 for filtration and then used, and the other part returns to the first oxygen buffer tank 7 through the return pipe 22.

[0040] Through the above steps, according to the principle of pressure swing adsorption, the molecular sieve adsorbs under pressure and desorbs under reduced pressure. In order to make the desorption of the molecular sieve more thorough, a vacuum negative pressure system is designed. During the desorption stage, nitrogen can be quickly discharged, improving the working efficiency. It has an original equalization program and a reflux buffer structure, with high oxygen production efficiency, high oxygen production purity, good equipment operation stability. The equipment can be modularly arranged according to transportation and installation requirements. The standard layout is the size of a 40-foot container, and it can also be divided into two 20-foot containers.

[0041] The above has described the embodiments of the present invention in detail with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the gist of the present invention.

Claims

1. A diffused oxygen supply device for indoor spaces in plateau areas, comprising a first air filter (1); characterized in that: It also includes a second air filter (2), a first vacuum booster (3), a first adsorption tower (4), a second vacuum booster (5), a second adsorption tower (6), a first oxygen buffer tank (7), an oxygen booster (8), a high-pressure oxygen buffer tank (9), a precision air filter (10), a first intake pipe (11), a second intake pipe (12), a first exhaust muffler (13), a second exhaust muffler (14), a first connecting pipe (15), a second connecting pipe (16), a first oxygen pipe (17), a second oxygen pipe (18), a booster intake pipe (19), a booster outlet pipe (20), a filtered air supply pipe (21), a return pipe (22), a first vent pipe (23) and a second vent pipe (24); the first vacuum booster (3) and the first adsorption tower (4) are successively installed on the right side of the first air filter (1); the second vacuum booster (5) and the second adsorption tower (6) are successively installed on the right side of the second air filter (2); the first oxygen buffer tank (7), the oxygen booster (8) and the high-pressure oxygen buffer tank (9) are successively installed on the right side of the first adsorption tower (4) and the second adsorption tower (6); the precision air filter (10) is installed on the front side of the high-pressure oxygen buffer tank (9); the first intake pipe (11) is installed between the first air filter (1) and the first vacuum booster (3); the second intake pipe (12) is installed between the second air filter (2) and the second vacuum booster (5); the first exhaust muffler (13) is installed on the front side of the first vacuum booster (3); the second exhaust muffler (14) is installed on the rear side of the second vacuum booster (5); the first connecting pipe (15) is installed between the first vacuum booster (3) and the first adsorption tower (4); the second connecting pipe (16) is installed between the second vacuum booster (5) and the second adsorption tower (6); the first oxygen pipe (17) and the second oxygen pipe (18) are respectively installed between the first adsorption tower (4), the second adsorption tower (6) and the first oxygen buffer tank (7); the booster intake pipe (19) is installed between the first oxygen buffer tank (7) and the oxygen booster (8); the booster outlet pipe (20) is installed between the oxygen booster (8) and the high-pressure oxygen buffer tank (9); the filtered air supply pipe (21) is installed between the high-pressure oxygen buffer tank (9) and the precision air filter (10); the return pipe (22) is installed between the filtered air supply pipe (21) and the first oxygen buffer tank (7); the first vent pipe (23) is installed between the first vacuum booster (3) and the first exhaust muffler (13); the second vent pipe (24) is installed between the second vacuum booster (5) and the second exhaust muffler (14).

2. The diffused oxygen supply device for indoor space in plateau areas according to claim 1, characterized in that: Both the first air filter (1) and the second air filter (2) include a first filter cylinder body (201); a detachable first upper cover (202) is installed at the upper end of the first filter cylinder body (201); a first filter basket (203) and a second filter basket (204) are successively installed from the inside to the outside at the upper end of the inner bottom of the first filter cylinder body (201); an annular groove (205) is opened at the lower end of the first upper cover (202).

3. The diffused oxygen supply device for indoor space in plateau areas according to claim 2, characterized in that: A coupling and a shaft (206) are rotatably connected inside the first filter cylinder body (201); a motor (207) is installed at the lower end of the coupling and the shaft (206); reinforcing rods (208) symmetrically distributed left and right are fixedly connected between the motor (207) and the first filter cylinder body (201); a cleaning assembly (209) for cleaning the first filter basket (203) is installed at the upper end of the coupling and the shaft (206).

4. The diffused oxygen supply device for indoor space in plateau areas according to claim 3, characterized in that: The cleaning assembly (209) includes a frame (2091); brushes (2092) are fixedly connected to both the left and right ends of the frame (2091); limit columns (2093) symmetrically distributed left and right and matching with the annular groove (205) are fixedly connected to the upper end of the frame (2091).

5. A diffused oxygen supply device for indoor spaces in plateau areas according to claim 1, characterized in that: Both the first adsorption tower (4) and the second adsorption tower (6) include an adsorption tower body (601); a lower grille (602) and an upper grille (603) are sequentially installed in the adsorption tower body (601) from bottom to top; molecular sieves (604) are filled between the lower grille (602) and the upper grille (603); a detachable adsorption tower cover (605) is installed at the upper end of the adsorption tower body (601).

6. The diffused oxygen supply device for indoor space in plateau areas according to claim 1, characterized in that: The precision air filter (10) includes a second filter cylinder body (101); a first filter layer (102), a second filter layer (103), and a third filter layer (104) are sequentially arranged in the second filter cylinder body (101) from bottom to top; a detachable second upper cover (105) is installed at the upper end of the second filter cylinder body (101).

7. The diffused oxygen supply device for indoor space in plateau areas according to claim 6, characterized in that: The first filter layer (102), the second filter layer (103), and the third filter layer (104) are a HEPA filter screen, an activated carbon filter screen, and a particulate filter screen respectively.

8. A diffused oxygen supply device for indoor spaces in plateau areas according to claim 1, characterized in that: The first adsorption tower (4) is connected to the second adsorption tower (6) through an equalizing valve.

9. A diffused oxygen supply device for indoor spaces in plateau areas according to claim 1, characterized in that: Both the first exhaust muffler (13) and the second exhaust muffler (14) include a muffler cylinder body (141); A detachable left end cover (142) and a right end cover (143) are respectively installed at the left and right ends of the muffler cylinder body (141); baffle plates (144) are installed in the muffler cylinder body (141) at equal intervals; sound pipes (145) are inserted into the baffle plates (144); holes are provided on the surface of the sound pipes (145); the muffler cylinder body (141) is welded by double-layer steel plates, and there is a sandwich layer between them, and glass fiber or asbestos is filled in the sandwich layer.

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