Oxygen concentrator gas distribution valve

Abstract

The present invention discloses a gas distribution valve for an oxygen concentrator, the distribution valve comprising a housing, a movable valve mounted in cooperation with the housing, a fixed valve mounted in cooperation with the movable valve and fixedly mounted on the housing, and a driving device fixedly mounted on the housing and used to drive the movable valve to rotate. The present invention adopts a control method of driving the movable valve to rotate continuously, and utilizes the speed regulation of the driving device to reasonably control the adsorption time, adsorption pressure and vacuum pressure of each adsorption tower to achieve complete adsorption and complete desorption. The driving device drives the movable valve to rotate continuously and combines the design of each slot body on the movable valve to ensure that the distribution of the gas source and the extraction of oxygen are continuous, reliable and stable during the rotation of the movable valve, and achieves the effect of reducing the use of molecular sieves, saving costs, and having a simple device structure, improving the oxygen extraction speed, high efficiency and stable concentration.

Description

Technical Field

[0001] The invention belongs to the technical field of gas distribution, and in particular relates to a gas distribution valve for an oxygen generator. Background Art

[0002] As we all know, oxygen extraction can be achieved through chemical extraction, cryogenic method, and molecular sieve pressure swing adsorption extraction. Among them, molecular sieve is the most economical and effective way to extract oxygen. 3 / h~3m 3 The low-pressure molecular sieve oxygen production system with a capacity of / h has a complex structure, poor continuous stability of oxygen production and high cost.

[0003] The current implementation schemes include dual-tower linkage oxygen production through solenoid valve and cylinder control and four-tower PSA linkage oxygen production. The solenoid valve has high failure rate and is easy to be damaged. The cylinder is prone to problems such as eccentricity and broken shaft, which have an impact on oxygen extraction, and the dual-tower oxygen production has poor continuity. The four-tower PSA linkage oxygen production adopts rotary valve and servo motor control, which has disadvantages such as high cost and high power consumption. Due to the valve body structure design problem, grease is required to lubricate the bearings, which is easy to pollute oxygen. Because the adsorption pressure of PSA technology is as high as 0.45MPa, it is easy to generate large noise when discharging nitrogen. The proximity switch is used to find the origin, and it cannot rotate continuously. If the proximity switch is damaged, it is easy to cause the rotary valve to fail, causing the oxygen production equipment to malfunction and fail to produce oxygen.

[0004] Therefore, in view of the above technical problems, it is necessary to provide a gas distribution valve for an oxygen concentrator. Summary of the invention

[0005] In view of this, an object of the present invention is to provide a gas distribution valve for an oxygen concentrator to achieve continuous, stable, reliable and efficient oxygen extraction, while having a simple structure and low cost.

[0006] In order to achieve the above purpose, the technical solution provided by an embodiment of the present invention is as follows:

[0007] A gas distribution valve for an oxygen concentrator, the distribution valve comprising a housing, a movable valve mounted in cooperation with the housing, a fixed valve mounted in cooperation with the movable valve and fixedly mounted on the housing, and a driving device fixedly mounted on the housing and used for driving the movable valve to rotate;

[0008] The fixed valve comprises a first body, the first body is provided with a negative pressure through hole, a first annular groove located at the periphery of the negative pressure through hole, an oxygen outlet pipeline located at the periphery of the first annular groove and connected to the first annular groove, and at least two air inlet holes and at least two oxygen inlet pipelines located at the periphery of the first annular groove, one air inlet hole and one oxygen inlet pipeline are used to connect an adsorption tower, each air inlet hole and each oxygen inlet pipeline are arranged at intervals and rotationally symmetrically along a counterclockwise circumferential direction, the negative pressure through hole is used to connect to a vacuum pumping device, and the oxygen outlet pipeline is used to connect to an oxygen collecting device;

[0009] The movable valve comprises a second body, on which a vacuum hole correspondingly connected to the negative pressure through hole, a second annular groove located outside the vacuum hole and correspondingly connected to the first annular groove, an oxygen groove located outside the second annular groove and connected to the second annular groove and correspondingly connected to each oxygen inlet pipeline, and an air intake groove and a vacuum groove arranged in sequence near the edge of the second body in a circumferential direction, the oxygen groove is connected to the second annular groove, the air intake groove is connected to the air inlet on the side wall of the second body, and the vacuum groove is connected to the vacuum hole;

[0010] The movable valve rotates counterclockwise, and the air inlet groove is connected with each air inlet hole one by one, thereby introducing a large amount of air into each adsorption tower for oxygen production; the vacuuming groove is connected with each air inlet hole one by one after the air inlet groove, thereby exhausting the nitrogen in each adsorption tower by vacuuming;

[0011] The movable valve rotates counterclockwise, and the oxygen tank is connected to each oxygen inlet pipeline one by one, so that the oxygen in each adsorption tower is drawn out and introduced into the second annular groove. The oxygen in the second annular groove then enters the first annular groove and enters the oxygen collection device through the oxygen outlet pipeline.

[0012] In one embodiment, four air inlet holes are provided, which are respectively a first air inlet hole, a second air inlet hole, a third air inlet hole, and a fourth air inlet hole; four oxygen inlet pipelines are provided, which are respectively a first oxygen inlet pipeline, a second oxygen inlet pipeline, a third oxygen inlet pipeline, and a fourth oxygen inlet pipeline; the first air inlet hole, the first oxygen inlet pipeline, the second air inlet hole, the second oxygen inlet pipeline, the third air inlet hole, the third oxygen inlet pipeline, the fourth air inlet hole, and the fourth oxygen inlet pipeline are sequentially arranged in a rotationally symmetrical manner along a counterclockwise circumferential direction; the first air inlet hole, the second air inlet hole, the third air inlet hole, the third oxygen inlet pipeline, the fourth air inlet hole, and the fourth oxygen inlet pipeline are sequentially arranged in a rotationally symmetrical manner along a counterclockwise circumferential direction; The air hole and the fourth air inlet hole both penetrate the top and bottom of the first body in the vertical direction, the first oxygen inlet pipeline, the second oxygen inlet pipeline, the third oxygen inlet pipeline and the fourth oxygen inlet pipeline are all arranged in the first body in the horizontal direction, the first air inlet hole and the first oxygen inlet pipeline are a group and connected to the first adsorption tower, the second air inlet hole and the second oxygen inlet pipeline are a group and connected to the second adsorption tower, the third air inlet hole and the third oxygen inlet pipeline are a group and connected to the third adsorption tower, and the fourth air inlet hole and the fourth oxygen inlet pipeline are a group and connected to the fourth adsorption tower;

[0013] The movable valve rotates counterclockwise, and the air inlet groove is connected with the first air inlet hole, the second air inlet hole, the third air inlet hole, and the fourth air inlet hole one by one, thereby introducing a large amount of air into each adsorption tower for oxygen production; the vacuuming groove is connected with the first air inlet hole, the second air inlet hole, the third air inlet hole, and the fourth air inlet hole one by one after the air inlet groove, thereby discharging the nitrogen in each adsorption tower by vacuuming;

[0014] The movable valve rotates counterclockwise, and the oxygen tank is connected to the first oxygen inlet pipeline, the second oxygen inlet pipeline, the third oxygen inlet pipeline and the fourth oxygen inlet pipeline one by one, so that the oxygen in each adsorption tower is drawn out and introduced into the second annular groove. The oxygen in the second annular groove then enters the first annular groove and enters the oxygen collection device through the oxygen outlet pipeline.

[0015] In one embodiment, a first pressure-equalizing groove is provided on one side of the oxygen groove, and a second back-blow groove is provided on the other side, a first back-blow groove is provided between the first pressure-equalizing groove and the second back-blow groove, the first pressure-equalizing groove, the first back-blow groove, the second back-blow groove and the oxygen groove are sequentially arranged at the bottom of the second body along a clockwise circumferential direction, the first back-blow groove is connected to the second annular groove, the second back-blow groove is connected to the second annular groove, a second pressure-equalizing groove connected to the first pressure-equalizing groove is provided between the vacuum groove and the air inlet groove, a nitrogen exhaust groove is provided between the vacuum groove and the air inlet groove, the air inlet groove, the nitrogen exhaust groove, the vacuum groove and the second pressure-equalizing groove are sequentially arranged at the bottom of the second body along a clockwise circumferential direction, and the nitrogen exhaust groove is connected to the nitrogen exhaust port on the side wall of the second body;

[0016] The movable valve rotates counterclockwise, and the air inlet groove is connected with the first air inlet hole, the second air inlet hole, the third air inlet hole, and the fourth air inlet hole one by one, thereby introducing a large amount of air into each adsorption tower for oxygen production; the nitrogen exhaust groove is connected with the first air inlet hole, the second air inlet hole, the third air inlet hole, and the fourth air inlet hole one by one after the air inlet groove, thereby discharging the nitrogen in each adsorption tower; the vacuum groove is connected with the first air inlet hole, the second air inlet hole, the third air inlet hole, and the fourth air inlet hole one by one after the nitrogen exhaust groove, thereby discharging the nitrogen in each adsorption tower by vacuuming; the second equalizing pressure groove is connected with the first air inlet hole, the second air inlet hole, the third air inlet hole, and the fourth air inlet hole one by one after the vacuum groove, thereby equalizing the pressure of each adsorption tower;

[0017] The movable valve rotates counterclockwise, and the oxygen tank is connected to the first oxygen inlet pipeline, the second oxygen inlet pipeline, the third oxygen inlet pipeline and the fourth oxygen inlet pipeline one by one, so as to lead out the oxygen in each adsorption tower; the first pressure equalizing tank is connected to the first oxygen inlet pipeline, the second oxygen inlet pipeline, the third oxygen inlet pipeline and the fourth oxygen inlet pipeline one by one after the oxygen tank, at this time, the second pressure equalizing tank is connected to the third air inlet hole, the fourth air inlet hole, the first air inlet hole and the second air inlet hole one by one, and the first pressure equalizing tank cooperates with the second pressure equalizing tank to realize the pressure equalization of the two relatively arranged adsorption towers; the first backflush tank is connected to the first oxygen inlet pipeline, the second oxygen inlet pipeline, the third oxygen inlet pipeline and the fourth oxygen inlet pipeline one by one after the first pressure equalizing tank, so as to backflush the corresponding adsorption towers; the second backflush tank is connected to the first oxygen inlet pipeline, the second oxygen inlet pipeline, the third oxygen inlet pipeline and the fourth oxygen inlet pipeline one by one after the first backflush tank, so as to backflush the corresponding adsorption towers.

[0018] In one embodiment, a pre-intake groove connected to the air inlet groove is provided at the bottom of the second body between the second pressure equalizing groove and the air inlet groove, and the width of the pre-intake groove is smaller than the width of the air inlet groove.

[0019] In one embodiment, a pre-gas replenishment groove is provided on the second body located outside the second back-blowing groove. The pre-gas replenishment groove is arranged at the bottom of the second body. The pre-gas replenishment communication hole vertically penetrates the top of the second body and is connected to the pre-gas replenishment groove.

[0020] In one embodiment, a damping assembly is installed between the housing and the movable valve and between the movable valve and the fixed valve. The damping assembly includes an upper friction plate affixed to the top of the movable valve, a lower friction plate affixed to the bottom of the movable valve and installed in cooperation with the fixed valve, an upper friction disk installed in cooperation with the upper friction plate, an upper cover fixedly installed on the housing and used to fix the driving device, and a plurality of elastic components installed between the upper cover and the upper friction disk.

[0021] In one embodiment, the elastic component includes an upper fixed column fixedly mounted on the upper cover, a lower fixed column fixedly mounted on the top of the upper friction plate, and a spring sleeved on the upper fixed column and the lower fixed column.

[0022] In one embodiment, a sleeve is installed between the vacuum hole, the lower friction plate and the negative pressure through hole, a second sealing ring is installed between the sleeve and the inner wall of the vacuum hole, and a third sealing ring is installed between the sleeve and the inner wall of the negative pressure through hole.

[0023] In one embodiment, a first sealing ring is installed between the upper friction plate and the inner wall of the shell, a fourth sealing ring is installed between the upper cover and the shell, a cavity is formed between the movable valve, the shell and the upper cover, and a first pipe joint connected to the cavity is installed on the shell.

[0024] In one embodiment, a second pipe joint is installed on the shell and is connected to the air inlet and the nitrogen exhaust port one by one.

[0025] Compared with the prior art, the present invention has the following advantages:

[0026] The present invention adopts a control method of driving a movable valve to rotate continuously, utilizes the speed adjustment of a driving device, reasonably controls the adsorption time, adsorption pressure and vacuum pressure of each adsorption tower, realizes complete adsorption and complete desorption, and the driving device drives the movable valve to rotate continuously and combines the design of each slot body on the movable valve to ensure that the distribution of the gas source and the extraction of oxygen are continuous, reliable and stable during the rotation of the movable valve, and achieves the effect of reducing the use of molecular sieves, saving costs, and having a simple device structure, improved oxygen extraction speed, high efficiency and stable concentration. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a structural schematic diagram of a gas distribution valve for an oxygen concentrator in one embodiment of the present invention;

[0029] Figure 2 It is a front cross-sectional view of a gas distribution valve of an oxygen concentrator in one embodiment of the present invention;

[0030] Figure 3 It is a schematic diagram of an explosion of a gas distribution valve of an oxygen concentrator in one embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the structure of a fixed valve in one embodiment of the present invention;

[0032] Figure 5 A top view of a fixed valve in one embodiment of the present invention;

[0033] Figure 6 It is a schematic structural diagram of a lower friction plate in one embodiment of the present invention;

[0034] Figure 7 It is a structural schematic diagram of a movable valve in one embodiment of the present invention;

[0035] Figure 8 FIG. 1 is a top view of a movable valve in one embodiment of the present invention. DETAILED DESCRIPTION

[0036] The present invention will be described in detail below in conjunction with the various embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional changes made by a person skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0037] The present invention discloses a gas distribution valve for an oxygen concentrator, comprising a housing 18, a movable valve 11 mounted in cooperation with the housing 18, a fixed valve 4 mounted in cooperation with the movable valve 11 and fixedly mounted on the housing 18, and a driving device 23 fixedly mounted on the housing 18 and used for driving the movable valve 11 to rotate;

[0038] The fixed valve 4 includes a first body, on which a negative pressure through hole 51 is provided, a first annular groove 52 located at the periphery of the negative pressure through hole 51, an oxygen outlet pipeline 53 located at the periphery of the first annular groove 52 and connected to the first annular groove 52, and at least two air inlet holes and at least two oxygen inlet pipelines located at the periphery of the first annular groove 52, one air inlet hole and one oxygen inlet pipeline are used to connect an adsorption tower, each air inlet hole and each oxygen inlet pipeline are arranged at intervals and rotationally symmetrically along the counterclockwise circumferential direction, the negative pressure through hole 51 is used to connect to a vacuum pumping device, and the oxygen outlet pipeline 53 is used to connect to an oxygen collecting device;

[0039] The movable valve 11 includes a second body, on which a vacuum hole 32 corresponding to and communicating with the negative pressure through hole 51 is provided, a second annular groove 34 located outside the vacuum hole 32 and correspondingly communicating with the first annular groove 52, an oxygen groove 26 located outside the second annular groove 34 and communicating with the second annular groove 34 and correspondingly communicating with each oxygen inlet pipeline, and an air intake groove 24 and a vacuum groove 29 arranged in sequence near the edge of the second body and in the circumferential direction, the oxygen groove 26 is connected to the second annular groove 34, the air intake groove 24 is connected to the air inlet on the side wall of the second body, and the vacuum groove 29 is connected to the vacuum hole 32;

[0040] The movable valve 11 rotates counterclockwise, and the air inlet groove 24 is connected with each air inlet hole one by one, thereby introducing a large amount of air into each adsorption tower for oxygen production; the vacuum groove 29 is connected with each air inlet hole one by one after the air inlet groove 24, thereby exhausting the nitrogen in each adsorption tower by vacuuming;

[0041] The movable valve 11 rotates counterclockwise, and the oxygen tank 26 is connected to each oxygen inlet pipeline one by one, so that the oxygen in each adsorption tower is drawn out and introduced into the second annular groove 34. The oxygen in the second annular groove 34 then enters the first annular groove 52 and enters the oxygen collection device through the oxygen outlet pipeline 53.

[0042] The present invention is further described below in conjunction with specific embodiments.

[0043] Ginseng Figure 1 Combined with Figure 2As shown, a gas distribution valve for an oxygen concentrator includes a shell 18, a movable valve 11 installed in cooperation with the shell 18, a fixed valve 4 installed in cooperation with the movable valve 11 and fixedly installed with the shell 18, a damping assembly installed between the shell 18 and the movable valve 11 and between the movable valve 11 and the fixed valve 4, and a driving device 23 fixedly installed with the shell 18 and used for driving the movable valve 11 to rotate. A base 1 is installed below the fixed valve 4, and the base 1 is fixedly installed with the fixed valve 4 through a plurality of connecting rods 2.

[0044] Ginseng Figure 2 As shown, the movable valve 11 is installed inside the shell 18, the fixed valve 4 is installed below the movable valve 11 and fixedly installed to the bottom of the shell 18, part of the damping assembly is located above the movable valve 11 and fixedly installed to the top of the shell 18, and the other part of the damping assembly is located between the movable valve 11 and the fixed valve 4 and is installed in cooperation with the fixed valve 4.

[0045] Ginseng Figure 2 Combined with Figure 3 As shown, the damping assembly includes an upper friction plate 12 affixed to the top of the movable valve 11, a lower friction plate 10 affixed to the bottom of the movable valve 11 and mounted in cooperation with the fixed valve 4, an upper friction disc 15 mounted in cooperation with the top of the upper friction plate 12, an upper cover 22 fixedly mounted to the housing 18 and used to fix the driving device 23, and a plurality of elastic components mounted between the upper cover 22 and the upper friction disc 15, wherein a plurality of first positioning sleeves 13 are mounted between the upper friction disc 15 and the upper friction plate 12, the diameters of the first positioning sleeves 13 being different, and some of the first positioning sleeves 13 being located on the upper friction disc 15. Inside, part of the first locating sleeve 13 is located in the upper friction plate 12, and the first locating sleeve 13 is used to realize the positioning between the upper friction plate 12 and the upper friction disc 15, so as to prevent the upper friction plate 12 from rotating with the rotation of the movable valve 11. A plurality of second locating sleeves 9 are installed between the fixed valve 4 and the lower friction plate 10, and the diameters of the second locating sleeves 9 are different. Part of the second locating sleeves 9 are located in the fixed valve 4, and part of the second locating sleeves 9 are located in the lower friction plate 10. The second locating sleeves 9 are used to realize the positioning between the lower friction plate 10 and the fixed valve 4, so as to prevent the lower friction plate 10 from rotating with the rotation of the movable valve 11.

[0046] Among them, the elastic component includes an upper fixed column 161 fixedly installed on the upper cover 22, a lower fixed column 162 fixedly installed on the top of the upper friction disc 15, and a spring 16 sleeved on the upper fixed column 161 and the lower fixed column 162, the two ends of the spring 16 respectively press against the lower surface of the upper cover 22 and the upper surface of the upper friction disc 15, and the tension of the spring 16 is transmitted to the lower friction plate 10 and the fixed valve 4 through the upper friction disc 15 and the upper friction plate 12, so that the lower surface of the upper friction plate 12 fits with the upper surface of the movable valve 11 and the lower surface of the movable valve 11 fits with the upper surface of the lower friction plate 10, thereby generating a damping effect on the movable valve 11 when the movable valve 11 rotates.

[0047] Ginseng Figure 2As shown, the driving device 23 in this embodiment adopts a reduction motor or a servo motor. The driving device 23 is installed on the top of the upper cover 22. A driving shaft 19 is installed on the output shaft of the driving device 23. The driving shaft 19 passes through the upper cover 22, the upper friction disc 15 and the upper friction plate 12 and extends into the movable valve 11. A sealing ring 20 is installed between the driving shaft 19 and the upper cover 22. A groove 111 for the driving shaft 19 to extend into is opened on the top of the movable valve 11. The horizontal section of the groove 111 is a quadrilateral or polygon. The shape of the part of the driving shaft 19 extending into the groove 111 corresponds to the groove 111, so that the driving shaft 19 is driven to rotate by the driving device 23 to drive the movable valve 11 to rotate.

[0048] In addition, a first sealing ring 14 is installed between the upper friction plate 15 and the inner wall of the housing 18, a fourth sealing ring 21 is installed between the upper cover 22 and the housing 18, a first conducting hole 121 for the drive shaft 19 to pass through is opened on the upper friction plate 12, and a second conducting hole 151 for the drive shaft 19 to pass through is opened on the upper friction plate 15. The diameter of the first conducting hole 121 is larger than the second conducting hole 151, and the diameter of the second conducting hole 151 is larger than the diameter of the drive shaft 19, so that a cavity is formed between the movable valve 11, the upper friction plate 12, the upper friction plate 15, the housing 18 and the upper cover 22. At the same time, a first pipe joint 181 connected to the cavity is installed on the housing 18, and air enters the cavity through the first pipe joint 181.

[0049] Ginseng Figure 8 Combined with Figure 1 As shown, a nitrogen exhaust port 111 and an air inlet 112 are provided on the side wall of the movable valve 11, and a second pipe joint 182 is installed on the shell 18. The second pipe joint 182 is connected to the nitrogen exhaust port 111 and the air inlet 112 one by one through the rotation of the movable valve 11, and the second pipe joint 182 is connected to an external air supply device (such as a fan).

[0050] Ginseng Figure 1 As shown, a plurality of first connectors 5 respectively connected to the corresponding adsorption towers are evenly installed on the side wall of the fixed valve 4, four first connectors 5 are evenly installed, respectively corresponding to the first adsorption tower, the second adsorption tower, the third adsorption tower and the fourth adsorption tower, a second connector 65 connected to the oxygen collection device is installed on the side wall of the fixed valve 4, a plurality of first elbow joints 3 are installed at the bottom of the fixed valve 4, the first elbow joint 3 is connected to the bottom of the fixed valve 4 through the first connecting pipe, the first elbow joint 3 is connected to the corresponding adsorption tower at the same time, four first elbow joints 3 are evenly installed and respectively connected to the first adsorption tower, the second adsorption tower, the third adsorption tower and the fourth adsorption tower.

[0051] Ginseng Figure 2As shown, the movable valve 11 is connected with the fixed valve 4, and a shaft sleeve 7 is installed between the movable valve 11 and the fixed valve 4. One end of the shaft sleeve 7 extends into the movable valve 11, and the other end extends into the fixed valve 4. A second sealing ring 6 is installed between the shaft sleeve 7 and the movable valve 11, and a third sealing ring 8 is installed between the shaft sleeve 7 and the fixed valve 4. The movable valve 11, the shaft sleeve 7 and the fixed valve 4 are connected, and a second connecting pipe 67 connected with the shaft sleeve 7 is installed at the bottom of the fixed valve 4. The second connecting pipe 67 is connected to the second elbow joint 68 at the same time, and the second elbow joint 68 is connected to the vacuum pumping device. By arranging the shaft sleeve 7, when the movable valve 11 rotates, the sealed circulation of gas between the movable valve 11, the fixed valve 4 and the second connecting pipe 67 can be guaranteed.

[0052] Ginseng Figure 5 Combined with Figure 4 As shown, the fixed valve 4 includes a first body with a circular horizontal cross-section, on which a negative pressure through hole 51, a first annular groove 52 located outside the negative pressure through hole 51, a plurality of conducting holes 38 connected to the first annular groove 52, and a first air inlet hole 35, a first oxygen inlet pipeline 69, a second air inlet hole 39, a second oxygen inlet pipeline 70, a third air inlet hole 43, a third oxygen inlet pipeline 71, a fourth air inlet hole 47 and a fourth oxygen inlet pipeline 72 are arranged in sequence outside the first annular groove 52.

[0053] The negative pressure through hole 51 is arranged at the center of the first body, and the negative pressure through hole 51 vertically penetrates the top and bottom of the first body. The sleeve 7 is installed in cooperation with the negative pressure through hole 51 and the second connecting pipe 67 at the same time.

[0054] Furthermore, the first annular groove 52 is arranged on the periphery of the negative pressure through hole 51, the first annular groove 52 is opened at the bottom of the first body, the bottom of the first annular groove 52 is sealed by the annular plate 73, the first annular groove 52 and the negative pressure through hole 51 are coaxially arranged, and the conducting holes 38 are provided with four and are arranged in a rotationally symmetrical distribution. The conducting holes 38 pass through the top of the first body in the vertical direction and are connected to the first annular groove 52.

[0055] Ginseng Figure 5 As shown, the first air inlet hole 35, the first oxygen inlet pipeline 69, the second air inlet hole 39, the second oxygen inlet pipeline 70, the third air inlet hole 43, the third oxygen inlet pipeline 71, the fourth air inlet hole 47, and the fourth oxygen inlet pipeline 72 are distributed on the periphery of the first annular groove 52 and are evenly distributed in a counterclockwise circumferential direction.

[0056] Among them, the first air inlet hole 35, the second air inlet hole 39, the third air inlet hole 43, and the fourth air inlet hole 47 all penetrate the top and bottom of the first body in the vertical direction, and the first air inlet hole 35, the second air inlet hole 39, the third air inlet hole 43, and the fourth air inlet hole 47 are arranged in rotationally symmetrical distribution, and the bottoms of the first air inlet hole 35, the second air inlet hole 39, the third air inlet hole 43 and the fourth air inlet hole 47 are respectively connected to the corresponding first elbow joint 3.

[0057] Furthermore, the first air inlet 35 is composed of a first through hole 351 and a second through hole 352 which are connected to each other. The diameter of the first through hole 351 is larger than the diameter of the second through hole 352. The first through hole 351 is located below the second through hole 352. The bottom of the first through hole 351 is connected to the corresponding first elbow joint 3. A first pre-air-supplementing hole 36 which is connected to the top of the first body and the first through hole 351 is provided on the first body on one side of the second through hole 352. The first pre-air-supplementing hole 36 is opened on the first body along the vertical direction.

[0058] Furthermore, the second air inlet hole 39 is composed of a third through hole 391 and a fourth through hole 392 that are connected to each other. The diameter of the third through hole 391 is larger than the diameter of the fourth through hole 392. The third through hole 391 is located below the fourth through hole 392. The bottom of the third through hole 391 is connected to the corresponding first elbow joint 3. A pre-air-supplementing connecting hole 40 that is connected to the third through hole 391 and the top of the first body is provided on the first body on one side of the fourth through hole 392. The pre-air-supplementing connecting hole 40 is provided on the first body along the vertical direction.

[0059] Furthermore, the third air inlet hole 43 is composed of a fifth through hole 431 and a sixth through hole 432 that are connected to each other. The diameter of the fifth through hole 431 is larger than the diameter of the sixth through hole 432. The fifth through hole 431 is located below the sixth through hole 432. The bottom of the fifth through hole 431 is connected to the corresponding first elbow joint 3. A third pre-air-supply hole 44 that is connected to the fifth through hole 431 is provided on the first body on one side of the sixth through hole 432. The third pre-air-supply hole 44 is provided on the first body along the vertical direction.

[0060] Furthermore, the fourth air inlet hole 47 is composed of a seventh through hole 471 and an eighth through hole 472 that are connected to each other. The diameter of the seventh through hole 471 is larger than the diameter of the eighth through hole 472. The seventh through hole 471 is located below the eighth through hole 472. The bottom of the seventh through hole 471 is connected to the corresponding first elbow joint 3. A fourth pre-air-supply hole 48 that is connected to the seventh through hole 471 is provided on the first body on one side of the eighth through hole 472. The fourth pre-air-supply hole 48 is provided on the first body along the vertical direction.

[0061] Ginseng Figure 5As shown, the first oxygen inlet pipeline 69, the second oxygen inlet pipeline 70, the third oxygen inlet pipeline 71 and the fourth oxygen inlet pipeline 72 are all arranged from the side wall of the first body toward the inside of the first body in the horizontal direction, and the first oxygen inlet pipeline 69, the second oxygen inlet pipeline 70, the third oxygen inlet pipeline 71 and the fourth oxygen inlet pipeline 72 are arranged in a rotationally symmetrical distribution. The first oxygen inlet pipeline 69, the second oxygen inlet pipeline 70, the third oxygen inlet pipeline 71 and the fourth oxygen inlet pipeline 72 are all installed in cooperation with the corresponding first connector 5. The end of the first oxygen inlet pipeline 69 near the first annular groove 52 is provided with a first oxygen hole 37 connected to the first oxygen inlet pipeline 69, and the end of the second oxygen inlet pipeline 70 near the first annular groove 52 is provided with a second oxygen inlet pipeline 70. The third oxygen hole 41 connected to the first body is provided with a third oxygen hole 45 connected to the third oxygen inlet pipeline 71, and the fourth oxygen hole 49 connected to the fourth oxygen inlet pipeline 72 is provided on the end of the fourth oxygen inlet pipeline 72 near the first annular groove 52. The first oxygen hole 37, the second oxygen hole 41, the third oxygen hole 45 and the fourth oxygen hole 49 all penetrate the top of the first body in the vertical direction. An oxygen outlet pipeline 53 is provided in the first body between the third air inlet hole 43 and the third oxygen inlet pipeline 71. The oxygen outlet pipeline 53 is arranged in the horizontal direction and penetrates the side wall of the first body and is connected to the first annular groove 52. The oxygen outlet pipeline 53 is installed in cooperation with the second connector 65.

[0062] In this embodiment, the negative pressure through hole 51 is used to connect to the vacuum device, the first air inlet hole 35 and the first oxygen inlet pipeline 69 are used to connect to the first adsorption tower, the second air inlet hole 39 and the second oxygen inlet pipeline 70 are used to connect to the second adsorption tower, the third air inlet hole 43 and the third oxygen inlet pipeline 71 are used to connect to the third adsorption tower, and the fourth air inlet hole 47 and the fourth oxygen inlet pipeline 72 are used to connect to the fourth adsorption tower.

[0063] Ginseng Figure 2 Combined with Figure 5 and Figure 6As shown, the lower friction plate 10 is located between the fixed valve 4 and the movable valve 11, and the lower friction plate 10 is provided with four first guide holes 76 which are respectively connected to the first air inlet hole 35, the second air inlet hole 39, the third air inlet hole 43, and the fourth air inlet hole 47, and a part of the second positioning sleeves 9 are respectively installed between the first guide holes 76 and the corresponding first air inlet hole 35, the second air inlet hole 39, the third air inlet hole 43, and the fourth air inlet hole 47, and the lower friction plate 10 is provided with four first pre-supplementary air holes 36, the second pre-supplementary air holes 40, the third pre-supplementary air holes 44, and the fourth pre-supplementary air holes 48 which are respectively connected to the first pre-supplementary air holes 36, the second pre-supplementary air holes 40, the third pre-supplementary air holes 44, and the fourth pre-supplementary air holes 48. The lower friction plate 10 is provided with four third guide holes 78 which are connected to the first oxygen hole 37, the second oxygen hole 41, the third oxygen hole 45 and the fourth oxygen hole 49 respectively; another part of the second positioning sleeves 9 are respectively installed between the third guide holes 78 and the corresponding first oxygen hole 37, the second oxygen hole 41, the third oxygen hole 45 and the fourth oxygen hole 49; the lower friction plate 10 is provided with four fourth guide holes 79 which are connected to the four conduction holes 38 respectively; the lower friction plate 10 is provided with a fifth guide hole 80 which is connected to the negative pressure through hole 51.

[0064] Ginseng Figure 8 Combined with Figure 7 As shown, the movable valve 11 includes a second body with a circular horizontal cross-section, on which a vacuum hole 32, a second annular groove 34 located outside the vacuum hole 32, a first pressure equalizing groove 74, a first backflush groove 33, a second backflush groove 30 and an oxygen groove 26 are arranged in sequence near the second annular groove 34, and a pre-intake groove 27, an intake groove 24, a nitrogen exhaust groove 31, a vacuum groove 29 and a second pressure equalizing groove 75 are arranged in sequence away from the second annular groove 34 and near the edge of the second body.

[0065] The vacuum hole 32 is disposed at the center of the second body, and the vacuum hole 32 is vertically disposed at the bottom of the second body and is correspondingly connected to the negative pressure through hole 51 .

[0066] Ginseng Figure 2 Combined with Figure 3 As shown, the shaft sleeve 7 passes through the lower friction plate 10 and one end is installed in the vacuum hole 32 and communicated with the vacuum hole 32, and the other end is installed in the negative pressure through hole 51 and communicated with the second connecting pipe 67. The second sealing ring 6 is installed between the shaft sleeve 7 and the inner wall of the vacuum hole 32, and the second sealing ring 6 is embedded in the inner wall of the vacuum hole 32. The third sealing ring 8 is installed between the shaft sleeve 7 and the inner wall of the negative pressure through hole 51, and the third sealing ring 8 is embedded in the inner wall of the negative pressure through hole 51.

[0067] Ginseng Figure 8As shown, the second annular groove 34 is arranged at the periphery of the vacuum hole 32 , the second annular groove 34 and the vacuum hole 32 are arranged coaxially, and the second annular groove 34 is arranged at the bottom of the second body and is connected to a plurality of conducting holes 38 at the same time.

[0068] Ginseng Figure 8 As shown, the first pressure equalizing groove 74, the first backblowing groove 33, the second backblowing groove 30 and the oxygen groove 26 are arranged in sequence at the bottom of the second body along the clockwise circumferential direction, the first pressure equalizing groove 74 and the second pressure equalizing groove 75 are connected through the inside of the second body, the first backblowing groove 33 is connected to the second annular groove 34, the second backblowing groove 30 is connected to the second annular groove 34, and the oxygen groove 26 is connected to the second annular groove 34.

[0069] Ginseng Figure 8 As shown, the pre-air inlet groove 27, the air inlet groove 24, the nitrogen exhaust groove 31, the vacuum groove 29 and the first pressure equalizing groove 74 are arranged in sequence at the bottom of the second body along the clockwise circumferential direction, the pre-air inlet groove 27 is connected to the air inlet groove 24, the width of the pre-air inlet groove 27 is smaller than the width of the air inlet groove 24, the air inlet groove 24 is connected to the air inlet port 112 on the side wall of the second body, the air inlet port 112 is connected to the tail end of the air inlet groove 24, the air inlet groove 24 is correspondingly connected to the second pipe joint 182 on the shell 18 through the air inlet port 112 and is connected to the external air supply device through the second pipe joint 182, the nitrogen exhaust groove 31 is connected to the nitrogen exhaust port 111 on the side wall of the second body, the nitrogen exhaust groove 31 is correspondingly connected to the second pipe joint 182 on the shell 18 through the nitrogen exhaust port 111, and the vacuum groove 29 is connected to the vacuum hole 32.

[0070] Ginseng Figure 8 As shown, a pre-gas-supplement groove 28 is provided on the second body located at the periphery of the second back-blowing groove 30, and the pre-gas-supplement groove 28 is arranged at the bottom of the second body. A pre-gas-supplement connecting hole 281 passes through the top of the second body in the vertical direction and is connected with the pre-gas-supplement groove 28. The pre-gas-supplement connecting hole 281 is also connected with the first conducting hole 121 and thus connected with the cavity above. The diameter of the part of the pre-gas-supplement connecting hole 281 near the top of the second body is larger than the diameter of the part of the pre-gas-supplement connecting hole 281 near the pre-gas-supplement groove 28.

[0071] Here, the first adsorption tower cooperates with other adsorption towers to describe the entire oxygen production and nitrogen removal process as follows:

[0072] Air intake / oxygen production: The movable valve 11 rotates counterclockwise, and the pre-intake groove 27 is correspondingly connected to the first air intake hole 35, so that a small amount of air is introduced into the first adsorption tower in advance. By pre-supplementing air, the time for reaching the adsorption pressure in the first adsorption tower is shortened. At this time, the second backflush groove 30 is correspondingly connected to the first oxygen inlet pipeline 69, and a small amount of oxygen produced by the first adsorption tower is transported to the second backflush groove 30 through the first oxygen inlet pipeline 69 and the first oxygen hole 37, and then transported to the second annular groove 34 through the second backflush groove 30, and then the oxygen in the second annular groove 34 is transported to the first annular groove 52 through the conducting hole 38, and finally transported to the oxygen collection device through the oxygen outlet pipeline 53 for collection. At the same time, the second air intake hole 39 is correspondingly connected to the vacuum groove 29, the third air intake hole 43 is correspondingly connected to the nitrogen exhaust groove 31, the fourth air intake hole 47 is correspondingly connected to the air intake groove 24, and the fourth oxygen hole 49 is correspondingly connected to the oxygen groove 26.

[0073] The movable valve 11 rotates counterclockwise, and the air inlet groove 24 is connected to the first air inlet hole 35 correspondingly following the pre-air inlet groove 27. At this time, the oxygen groove 26 is connected to the first oxygen inlet pipeline 69 correspondingly, and the second backflush groove 30 is connected to the second oxygen hole 41 correspondingly. A large amount of air is introduced into the first adsorption tower through the air inlet groove 24 and the first air inlet hole 35 for oxygen production. The oxygen generated in the first adsorption tower enters the first oxygen inlet pipeline 69 and flows into the oxygen groove 26 through the first oxygen hole 37. The oxygen in the oxygen groove 26 then flows into the second annular groove 34. The oxygen in the second annular groove 34 flows into the first annular groove 52 through the conducting hole 38 and is collected. The collected oxygen finally flows into the oxygen collecting device through the oxygen outlet pipe 53 for collection. At the same time, part of the oxygen enters the second backflush groove 30 through the second annular groove 34. The oxygen in the second backflush groove 30 enters the second adsorption tower through the second oxygen hole 41 and the second oxygen inlet pipe 70, so as to realize backflush in the second adsorption tower and help the molecular sieve in the second adsorption tower to be vacuum desorbed. At the same time, during the rotation process, the pre-gas replenishment groove 28 will be connected with the pre-gas replenishment connecting hole 40, the second pressure equalizing groove 75 will be connected with the second air inlet hole 39, the first pressure equalizing groove 74 will be connected with 49, and the vacuum groove 29 will be connected with the third air inlet hole 43.

[0074] The movable valve 11 rotates counterclockwise, and when the first air inlet 35 is connected to a section at the end of the air inlet groove 24, the pre-air inlet groove 27 begins to be connected to the second air inlet 39. At this time, the second adsorption tower also starts to produce a small amount of oxygen, and the nitrogen exhaust groove 31 is connected to the fourth air inlet 47.

[0075] Primary pressure equalization: the movable valve 11 rotates counterclockwise, and the air inlet groove 24 is no longer connected to the first air inlet hole 35. At this time, the first pressure equalizing groove 74 is connected to the first oxygen hole 37, and the second pressure equalizing groove 75 is connected to the third air inlet hole 43. The oxygen in the first adsorption tower flows into the third adsorption tower through the first oxygen inlet pipeline 69, the first oxygen hole 37, the first equalizing groove 74, the second pressure equalizing groove 75 and the third air inlet hole 43. The molecular sieve in the third adsorption tower is optimized and purified to improve efficiency, save energy, realize the reuse of oxygen-enriched gas, and reduce the use of gas source. At the same time, the air pressure in the third adsorption tower is also increased to achieve the effect of balancing the air pressure in the first adsorption tower and the third adsorption tower. At this time, the air inlet groove 24 is connected to the second air inlet hole 39, and the second adsorption tower starts to produce a large amount of oxygen. The second backflush groove 30 is connected to the third oxygen hole 45, and part of the oxygen produced by the second adsorption tower enters the third adsorption tower. The vacuum groove 29 and the fourth air inlet hole 47 begin to be connected to each other.

[0076] Natural nitrogen discharge: the movable valve 11 rotates counterclockwise, and the nitrogen discharge groove 31 begins to be connected with the first air inlet 35. At this time, the first adsorption tower is connected with the outside to discharge the nitrogen in the first adsorption tower naturally. At this time, the air inlet groove 24 is still connected with the second air inlet 39, the pre-air inlet groove 27 is connected with the third air inlet 43, the second backflush groove 30 is connected with the third oxygen hole 45, the second adsorption tower continues to produce a large amount of oxygen, and part of the oxygen is sent to the third adsorption tower. At the same time, a small amount of air enters the third adsorption tower. The small amount of oxygen produced by the third adsorption tower is collected in the first annular groove 52 through the third oxygen inlet pipeline 71, the third oxygen hole 45, and the second annular groove 34, and finally transported to the oxygen collection device through the oxygen outlet pipeline 53 for collection. The vacuum groove 29 is connected with the fourth air inlet 47.

[0077] The movable valve 11 rotates counterclockwise, and when a section at the end of the nitrogen discharge groove 31 is connected to the first air inlet 35, the first backflush groove 33 begins to communicate with the first oxygen hole 37, and the air inlet groove 24 is still correspondingly connected to the second air inlet 39, and the air inlet groove 24 is gradually connected to the third air inlet 43, and the oxygen groove 26 is correspondingly connected to the second oxygen hole 41. At this time, part of the oxygen produced by the second adsorption tower in the second annular groove 34 and part of the oxygen produced by the third adsorption tower are sequentially backflush into the first adsorption tower through the second annular groove 34, the first backflush groove 33, the first oxygen hole 37 and the first oxygen inlet pipeline 69, thereby promoting the natural nitrogen discharge of the first adsorption tower. The first backflush groove 33 moves away from the first oxygen hole 37 as the nitrogen discharge groove 31 moves away from the first air inlet 35.

[0078] Vacuuming and nitrogen removal: When the movable valve 11 rotates counterclockwise and the vacuuming groove 29 is connected to the first air inlet 35, the vacuuming device evacuates the interior of the first adsorption tower through the vacuuming hole 32 and the vacuuming groove 29 to realize vacuum desorption and nitrogen removal in the first adsorption tower. At this time, the first pressure equalizing groove 74 is connected to the second oxygen hole 41, and the second pressure equalizing groove 75 is connected to the fourth air inlet 47. Part of the oxygen produced in the second adsorption tower enters the fourth adsorption tower to achieve uniformity. The air inlet groove 24 is connected to the third air inlet 43, and the oxygen groove 26 is connected to the third oxygen hole 45. The third adsorption tower produces oxygen. The second backflush groove 30 is connected to the fourth oxygen hole 49, and part of the oxygen produced in the third adsorption tower enters the fourth adsorption tower to achieve backflush.

[0079] The movable valve 11 rotates counterclockwise, and the pre-gas replenishment groove 28 is connected to the first pre-gas replenishment hole 36 accordingly, so that the first adsorption tower is connected to the outside through the first air inlet hole 35 and the first pre-gas replenishment hole 36, so as to realize the pre-gas replenishment and adjustment of the pressure in the tower of the first adsorption tower after the vacuum negative pressure is drawn. At this time, the air inlet groove 24 is connected to the fourth air inlet hole 47 accordingly, and the oxygen groove 26 is connected to the fourth oxygen hole 49 accordingly, and the fourth adsorption tower produces oxygen.

[0080] Secondary pressure equalization: the movable valve 11 rotates counterclockwise, the second pressure equalizing tank 75 is connected to the first air inlet 35, the first pressure equalizing tank 74 is connected to the third oxygen hole 45, the second backflush tank 30 is connected to the first oxygen hole 37, and the oxygen in the third adsorption tower enters the first adsorption tower through the third oxygen inlet pipeline 71, the third oxygen hole 45, the first pressure equalizing tank 74, the second pressure equalizing tank 75, the first oxygen hole 37 and the first oxygen inlet pipeline 69. The oxygen is optimized and purified again by the molecular sieve in the first adsorption tower, the efficiency is improved, the energy is saved, the oxygen-enriched reuse is realized, the use of the gas source is also reduced, and the air pressure in the first adsorption tower is increased at the same time, so as to achieve the effect of balancing the air pressure in the first adsorption tower and the third adsorption tower. At the same time, the second air inlet 39 is connected to the vacuum tank 29, so that the second adsorption tower is vacuumed and nitrogen is discharged, the air inlet tank 24 is connected to the fourth air inlet 47, the oxygen tank 26 is connected to the fourth oxygen hole 49, and the fourth adsorption tower continues to produce oxygen.

[0081] After the second pressure equalization, the first adsorption tower starts to take in air / produce oxygen again, and the cycle continues.

[0082] From the above, it can be seen that the gas distribution process formed by the first adsorption tower in conjunction with the movable valve 11 and the fixed valve 4 is: air intake / oxygen production-primary equalization-natural nitrogen exhaust-vacuum nitrogen exhaust-secondary equalization-air intake / oxygen production, and this cycle is followed. Among them, the primary equalization is that the gas from the first adsorption tower flows to the third adsorption tower to achieve pressure balance between the two adsorption towers, and the secondary equalization is that the gas from the third adsorption tower flows to the first adsorption tower to achieve pressure balance between the two adsorption towers. Therefore, both the primary equalization and the secondary equalization are for pressure balance between the two adsorption towers arranged opposite to each other.

[0083] The gas distribution process formed by the second adsorption tower, the third adsorption tower and the fourth adsorption tower in cooperation with the movable valve 11 and the fixed valve 4 refers to the gas distribution process formed by the first adsorption tower in cooperation with the movable valve 11 and the fixed valve 4, and will not be repeated here.

[0084] It can be seen from the above technical solutions that the present invention has the following beneficial effects:

[0085] The present invention adopts a control method of driving a movable valve to rotate continuously, utilizes the speed adjustment of a driving device, reasonably controls the adsorption time, adsorption pressure and vacuum pressure of each adsorption tower, realizes complete adsorption and complete desorption, and the driving device drives the movable valve to rotate continuously and combines the design of each slot body on the movable valve to ensure that the distribution of the gas source and the extraction of oxygen are continuous, reliable and stable during the rotation of the movable valve, and achieves the effect of reducing the use of molecular sieves, saving costs, and having a simple device structure, improved oxygen extraction speed, high efficiency and stable concentration.

[0086] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0087] In addition, it should be understood that although the present specification is described according to embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that those skilled in the art can understand.

Claims

1. A gas distribution valve for an oxygen concentrator, characterized in that: The distribution valve comprises a housing (18), a movable valve (11) mounted in cooperation with the housing (18), a fixed valve (4) mounted in cooperation with the movable valve (11) and fixedly mounted on the housing (18), and a driving device (23) fixedly mounted on the housing (18) and used for driving the movable valve (11) to rotate; The fixed valve (4) comprises a first body, the first body is provided with a negative pressure through hole (51), a first annular groove (52) located outside the negative pressure through hole (51), an oxygen outlet pipeline (53) located outside the first annular groove (52) and connected to the first annular groove (52), and at least two air inlet holes and at least two oxygen inlet pipelines located outside the first annular groove (52), one air inlet hole and one oxygen inlet pipeline are used to connect to an adsorption tower, each air inlet hole and each oxygen inlet pipeline are arranged at intervals and are rotationally symmetrically arranged in a counterclockwise circumferential direction, the negative pressure through hole (51) is used to connect to a vacuum pumping device, and the oxygen outlet pipeline (53) is used to connect to an oxygen collecting device; The movable valve (11) comprises a second body, on which a vacuum hole (32) correspondingly connected to the negative pressure through hole (51) is provided, a second annular groove (34) located outside the vacuum hole (32) and correspondingly connected to the first annular groove (52), an oxygen groove (26) located outside the second annular groove (34) and connected to the second annular groove (34) and correspondingly connected to each oxygen inlet pipeline, and an air intake groove (24) and a vacuum groove (29) arranged in sequence near the edge of the second body and in the circumferential direction, the oxygen groove (26) being connected to the second annular groove (34), the air intake groove (24) being connected to the air inlet (112) on the side wall of the second body, and the vacuum groove (29) being connected to the vacuum hole (32); The movable valve (11) rotates counterclockwise, and the air inlet groove (24) is connected to each air inlet hole one by one, thereby introducing a large amount of air into each adsorption tower to produce oxygen; the vacuum groove (29) is connected to each air inlet hole one by one after the air inlet groove (24), thereby discharging nitrogen in each adsorption tower by vacuuming; The movable valve (11) rotates counterclockwise, and the oxygen tank (26) is connected to each oxygen inlet pipeline one by one, thereby drawing out the oxygen in each adsorption tower and introducing it into the second annular groove (34). The oxygen in the second annular groove (34) then enters the first annular groove (52) and enters the oxygen collection device through the oxygen outlet pipeline (53); The air inlet holes are provided in four numbers, namely, a first air inlet hole (35), a second air inlet hole (39), a third air inlet hole (43), and a fourth air inlet hole (47); the oxygen inlet pipelines are provided in four numbers, namely, a first oxygen inlet pipeline (69), a second oxygen inlet pipeline (70), a third oxygen inlet pipeline (71), and a fourth oxygen inlet pipeline (72); the first air inlet hole (35), the first oxygen inlet pipeline (69), the second air inlet hole (39), the second oxygen inlet pipeline (70), the third air inlet hole (43), the third oxygen inlet pipeline (71), the fourth air inlet hole (47), and the fourth oxygen inlet pipeline (72) are sequentially arranged in a rotationally symmetrical manner along a counterclockwise circumferential direction; the first air inlet hole (35), the second air inlet hole (39), the second oxygen inlet pipeline (70), the third air inlet hole (43), the third oxygen inlet pipeline (71), the fourth air inlet hole (47), and the fourth oxygen inlet pipeline (72) are sequentially arranged in a rotationally symmetrical manner along a counterclockwise circumferential direction. 9), the third air inlet hole (43) and the fourth air inlet hole (47) both penetrate the top and bottom of the first body in the vertical direction, the first oxygen inlet pipeline (69), the second oxygen inlet pipeline (70), the third oxygen inlet pipeline (71) and the fourth oxygen inlet pipeline (72) are all arranged in the first body in the horizontal direction, the first air inlet hole (35) and the first oxygen inlet pipeline (69) are a group and are connected to the first adsorption tower, the second air inlet hole (39) and the second oxygen inlet pipeline (70) are a group and are connected to the second adsorption tower, the third air inlet hole (43) and the third oxygen inlet pipeline (71) are a group and are connected to the third adsorption tower, and the fourth air inlet hole (47) and the fourth oxygen inlet pipeline (72) are a group and are connected to the fourth adsorption tower; The movable valve (11) rotates in the counterclockwise direction, and the air inlet groove (24) is connected to the first air inlet hole (35), the second air inlet hole (39), the third air inlet hole (43), and the fourth air inlet hole (47) one by one, thereby introducing a large amount of air into each adsorption tower for oxygen production; the vacuum groove (29) is connected to the first air inlet hole (35), the second air inlet hole (39), the third air inlet hole (43), and the fourth air inlet hole (47) one by one after the air inlet groove (24), thereby discharging nitrogen in each adsorption tower by vacuuming; The movable valve (11) rotates counterclockwise, and the oxygen tank (26) is connected to the first oxygen inlet pipeline (69), the second oxygen inlet pipeline (70), the third oxygen inlet pipeline (71) and the fourth oxygen inlet pipeline (72) one by one, thereby drawing out the oxygen in each adsorption tower and introducing it into the second annular groove (34). The oxygen in the second annular groove (34) then enters the first annular groove (52) and enters the oxygen collection device through the oxygen outlet pipeline (53); A first pressure equalizing groove (74) is provided on one side of the oxygen groove (26), and a second backflush groove (30) is provided on the other side; a first backflush groove (33) is provided between the first pressure equalizing groove (74) and the second backflush groove (30); the first pressure equalizing groove (74), the first backflush groove (33), the second backflush groove (30) and the oxygen groove (26) are sequentially arranged at the bottom of the second body along a clockwise circumferential direction; the first backflush groove (33) is connected to the second annular groove (34); the second backflush groove (30) is connected to the The second annular groove (34) is connected to the second main body; a second pressure equalizing groove (75) connected to the first pressure equalizing groove (74) is provided between the vacuum groove (29) and the air inlet groove (24); a nitrogen exhaust groove (31) is provided between the vacuum groove (29) and the air inlet groove (24); the air inlet groove (24), the nitrogen exhaust groove (31), the vacuum groove (29) and the second pressure equalizing groove (75) are sequentially arranged at the bottom of the second main body along a clockwise circumferential direction; and the nitrogen exhaust groove (31) is connected to a nitrogen exhaust port (111) on the side wall of the second main body; The movable valve (11) rotates counterclockwise, and the air inlet groove (24) is connected to the first air inlet hole (35), the second air inlet hole (39), the third air inlet hole (43), and the fourth air inlet hole (47) one by one, thereby introducing a large amount of air into each adsorption tower for oxygen production; the nitrogen discharge groove (31) is connected to the first air inlet hole (35), the second air inlet hole (39), the third air inlet hole (43), and the fourth air inlet hole (47) one by one, thereby discharging nitrogen in each adsorption tower. The vacuum tank (29) is connected to the first air inlet (35), the second air inlet (39), the third air inlet (43), and the fourth air inlet (47) respectively after the nitrogen exhaust tank (31), so that the nitrogen in each adsorption tower can be discharged by vacuuming; the second pressure equalizing tank (75) is connected to the first air inlet (35), the second air inlet (39), the third air inlet (43), and the fourth air inlet (47) respectively after the vacuum tank (29), so that the pressure of each adsorption tower can be equalized; The movable valve (11) rotates counterclockwise, and the oxygen tank (26) is connected to the first oxygen inlet pipeline (69), the second oxygen inlet pipeline (70), the third oxygen inlet pipeline (71) and the fourth oxygen inlet pipeline (72) one by one, so that the oxygen in each adsorption tower is led out; the first pressure equalizing tank (74) is connected to the first oxygen inlet pipeline (69), the second oxygen inlet pipeline (70), the third oxygen inlet pipeline (71) and the fourth oxygen inlet pipeline (72) one by one after the oxygen tank (26), and at this time, the second pressure equalizing tank (75) is connected to the third air inlet hole (43), the fourth air inlet hole (47), the first air inlet hole (35), the second air inlet hole (39) one by one. The first pressure equalizing tank (74) cooperates with the second pressure equalizing tank (75) to realize pressure equalization of the two adsorption towers arranged opposite to each other; the first backflush tank (33) is connected to the first oxygen inlet pipeline (69), the second oxygen inlet pipeline (70), the third oxygen inlet pipeline (71) and the fourth oxygen inlet pipeline (72) one by one after the first pressure equalizing tank (74) so ​​as to backflush the corresponding adsorption towers; the second backflush tank (30) is connected to the first oxygen inlet pipeline (69), the second oxygen inlet pipeline (70), the third oxygen inlet pipeline (71) and the fourth oxygen inlet pipeline (72) one by one after the first backflush tank (33) so as to backflush the corresponding adsorption towers; A damping assembly is installed between the housing (18) and the movable valve (11) and between the movable valve (11) and the fixed valve (4), and the damping assembly comprises an upper friction plate (12) affixed to the top of the movable valve (11), a lower friction plate (10) affixed to the bottom of the movable valve (11) and installed in cooperation with the fixed valve (4), an upper friction disc (15) installed in cooperation with the upper friction plate (12), an upper cover (22) fixedly installed on the housing (18) and used to fix the driving device (23), and a plurality of elastic components installed between the upper cover (22) and the upper friction disc (15).

2. The oxygen concentrator gas distribution valve according to claim 1, characterized in that: A pre-intake groove (27) communicating with the air inlet groove (24) is provided at the bottom of the second body between the second pressure equalizing groove (75) and the air inlet groove (24); the width of the pre-intake groove (27) is smaller than the width of the air inlet groove (24).

3. The oxygen concentrator gas distribution valve according to claim 1, characterized in that: A pre-gas replenishment groove (28) is provided on the second body located outside the second back-blowing groove (30). The pre-gas replenishment groove (28) is arranged at the bottom of the second body. The pre-gas replenishment connecting hole (281) vertically penetrates the top of the second body and is connected to the pre-gas replenishment groove (28).

4. The oxygen concentrator gas distribution valve according to claim 1, characterized in that: The elastic component comprises an upper fixing column (161) fixedly mounted on the upper cover (22), a lower fixing column (162) fixedly mounted on the top of the upper friction plate (15), and a spring (16) sleeved on the upper fixing column (161) and the lower fixing column (162).

5. The oxygen concentrator gas distribution valve according to claim 1, characterized in that: A shaft sleeve (7) is installed between the vacuum hole (32), the lower friction plate (10) and the negative pressure through hole (51); a second sealing ring (6) is installed between the shaft sleeve (7) and the inner wall of the vacuum hole (32); and a third sealing ring (8) is installed between the shaft sleeve (7) and the inner wall of the negative pressure through hole (51).

6. The oxygen concentrator gas distribution valve according to claim 1, characterized in that: A first sealing ring (14) is installed between the upper friction plate (15) and the inner wall of the housing (18), a fourth sealing ring (21) is installed between the upper cover (22) and the housing (18), a cavity is formed between the movable valve (11), the housing (18) and the upper cover (22), and a first pipe joint (181) connected to the cavity is installed on the housing (18).

7. The oxygen concentrator gas distribution valve according to claim 1, characterized in that: The housing (18) is provided with a second pipe joint (182) which is in correspondence with the air inlet (112) and the nitrogen exhaust port (111).

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