An oxygen generator based on a vehicle-mounted central gas source

Abstract

This invention relates to the field of oxygen concentrator technology, and in particular to an oxygen concentrator based on a vehicle-mounted central air source. The vehicle-mounted central air source includes a solenoid valve interface with multiple air supply holes; a filter assembly, a first slide cylinder, an isolation plate disposed inside the first slide cylinder, an air supply pipe disposed on the outer wall of the first slide cylinder, and detachable molecular sieve cover plates disposed at both ends of the first slide cylinder. The molecular sieve cover plates include air inlet pipes, and the air inlet pipes include air outlets. This invention simplifies a three-chamber dual molecular sieve into a single-chamber slide cylinder structure, utilizing the isolation plate and a two-way valve to achieve continuous oxygen generation and nitrogen removal, significantly reducing the installation space inside the vehicle. Quick-release fixing ears, airbag seals, and a pressure-locking air inlet head allow for independent module replacement, facilitating subsequent maintenance. This invention significantly reduces vehicle space occupation and maintenance costs.

Description

Technical Field

[0001] This invention relates to the field of oxygen generator technology, and in particular to an oxygen generator based on a vehicle-mounted central air source. Background Technology

[0002] In high-altitude, desert, and long-distance enclosed driving conditions, occupants are prone to hypoxia, fatigue, and decreased cognitive function. Traditional onboard oxygen cylinders have limited storage capacity, are inconvenient to refill, and pose an explosion hazard due to high-pressure containers. They are no longer sufficient to meet the needs of military, police, ambulance, mining, and recreational vehicles for a continuous, safe, and lightweight oxygen source. Existing onboard oxygen generation solutions mostly adopt small medical PSA (Pressure Swing Adsorption) devices, generally using a "three-chamber, dual-tower" structure: one side uses molecular sieves to adsorb nitrogen to produce oxygen, while the other side desorbs and regenerates. An external solenoid valve group switches the oxygen at regular intervals, and a separate oil-free air compressor, cooler, air tank, and silencer filter are also configured. Although the system can achieve more than 93% oxygen enrichment, the components are scattered, the pipelines are long, and when arranged in a vehicle-wide layout, it occupies valuable space in the trunk or side compartment, and maintenance points are scattered.

[0003] With the rise of unmanned cockpits, high-altitude camping vehicles, and field medical platforms, the concept of a central air supply for vehicles is gradually taking shape—utilizing oil-free scroll air compressors to provide clean compressed air for brakes, seats, door pumps, and oxygen generators, achieving shared air supply, redundancy backup, and energy recovery. The integration of onboard central air supply with onboard oxygen generators has become a new trend. Summary of the Invention

[0004] In view of the problems existing in the prior art, the present invention is proposed.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an oxygen generator based on a vehicle-mounted central air source, which includes a solenoid valve interface in the vehicle-mounted central air source and a plurality of air supply holes in the solenoid valve interface.

[0006] The filter assembly includes a first slide cylinder, an isolation plate disposed inside the first slide cylinder, an air supply pipe disposed on the outer wall of the first slide cylinder, and molecular sieve cover plates detachably disposed at both ends of the first slide cylinder. The molecular sieve cover plates include air inlet pipes, and the air inlet pipes include air outlets.

[0007] As a preferred embodiment of the oxygen generator based on a vehicle-mounted central air source according to the present invention, wherein: the outer wall array of the first sliding cylinder is provided with fixing ears, and the outer wall of the molecular sieve cover is provided with fixing ears.

[0008] As a preferred embodiment of the oxygen generator based on a vehicle-mounted central air source according to the present invention, wherein: the air supply pipe includes a connecting pipe, and both ends of the connecting pipe extend into the interior of the first slide cylinder, and both ends are distributed on both sides of the isolation plate;

[0009] The gas supply pipe includes a gas outlet pipe, which is located in the middle section of the connecting pipe.

[0010] As a preferred embodiment of the oxygen generator based on a vehicle-mounted central air source according to the present invention, wherein: a two-way valve is provided inside the connecting pipe.

[0011] As a preferred embodiment of the oxygen generator based on a vehicle-mounted central air source according to the present invention, the bidirectional valve includes a disc, and the disc has a first movable channel and a second movable channel inside, wherein the cross-section of the second movable channel is larger than the cross-section of the first movable channel.

[0012] As a preferred embodiment of the oxygen generator based on a vehicle-mounted central air source according to the present invention, wherein: a first elastic element is provided inside the second active channel, and a first inclined surface is provided at the connection between the second active channel and the first active channel;

[0013] The disc is equipped with a ball valve.

[0014] As a preferred embodiment of the oxygen generator based on a vehicle-mounted central air source according to the present invention, wherein: the molecular sieve cover plate is provided with a first sliding groove, the first sliding groove is provided with an installation component, the air inlet pipe is provided with an air inlet head, and the air inlet head is connected to the molecular sieve cover plate through the installation component.

[0015] As a preferred embodiment of the oxygen generator based on a vehicle-mounted central air source according to the present invention, the mounting assembly includes a first piston rod and a second piston rod respectively disposed at both ends of the first slide groove, and a limiting platform is provided on the inner wall of the end of the first slide groove near the first slide cylinder for limiting the sliding of the first piston rod.

[0016] A second slide cylinder is fixedly installed on the inner wall of the other end of the first slide groove, which can be used for sliding the second piston rod. A limiting rod is slidably provided inside the second slide cylinder, and a fixing rod is provided at one end of the second piston rod to push out the limiting rod.

[0017] The air inlet head includes a flange, and the flange includes a through hole through which the second slide cylinder can pass.

[0018] As a preferred embodiment of the oxygen generator based on a vehicle-mounted central air source according to the present invention, wherein: the outer wall of the fixing rod is provided with a second inclined surface, one end of the fixing rod is provided with a fixing block, and the fixing block includes a third inclined surface;

[0019] The outer wall of the limiting rod is provided with a clearance groove, and the clearance groove includes a fourth inclined surface that can fit with the third inclined surface;

[0020] The outer wall of the limiting rod is provided with a fifth inclined surface that can fit into the second inclined surface.

[0021] As a preferred embodiment of the oxygen generator based on a vehicle-mounted central air source according to the present invention, a second elastic element is provided between the air inlet head and the molecular sieve cover plate;

[0022] A sealing gasket is provided between the molecular sieve cover plate and the first slide cylinder.

[0023] The beneficial effects of this invention are as follows: This invention simplifies the three-chamber dual molecular sieve into a single-chamber sliding cylinder structure, and uses an isolation plate and a two-way valve to achieve continuous oxygen production and nitrogen removal, which greatly reduces the installation space inside the vehicle; the quick-release fixing ears, airbag seal and air pressure self-locking air inlet head make the module replaceable independently, which is convenient for subsequent maintenance; This invention greatly reduces the space occupied by the vehicle and the maintenance cost. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the vehicle-mounted central air source structure in this invention;

[0026] Figure 2 This is a schematic diagram of the overall structure of the present invention;

[0027] Figure 3 This is a top view of the overall structure of the present invention;

[0028] Figure 4 In this invention Figure 3 Schematic diagram of the cross-sectional structure of the middle BB section;

[0029] Figure 5 This is a schematic diagram of the bidirectional valve structure in this invention;

[0030] Figure 6 In this invention Figure 4 Enlarged schematic diagram of the structure of region C in the middle;

[0031] Figure 7 In this invention Figure 4 Enlarged schematic diagram of the structure of region D in the middle;

[0032] Figure 8 This is a schematic diagram of the air intake head structure in this invention.

[0033] In the diagram: A, Vehicle-mounted central air source; A1, Solenoid valve interface; A11, Air supply port; 1, Filter assembly; 11, First slide cylinder; 111, Fixing lug; 12, Isolation plate; 13, Air supply pipe; 131, Connecting pipe; 132, Air outlet pipe; 14, Molecular sieve cover plate; 141, Air inlet pipe; 1411, Air outlet; 142, First slide groove; 1421, Limiting platform; 15, Two-way valve; 151, Disc; 1511, First movable channel; 1512, ... 2. Two movable channels; 16. First elastic element; 17. Ball valve; 2. Mounting assembly; 21. First piston rod; 22. Second piston rod; 221. Fixing rod; 2211. Second inclined surface; 222. Fixing block; 2221. Third inclined surface; 23. Second slide cylinder; 24. Limiting rod; 241. Clearance groove; 2411. Fourth inclined surface; 242. Fifth inclined surface; 25. Second elastic element; 3. Air inlet head; 31. Flange; 311. Through hole; 4. Sealing gasket. Detailed Implementation

[0034] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0035] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0036] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments. Example

[0037] Reference Figures 1-8 This is the first embodiment of the present invention, which provides an oxygen generator based on a vehicle-mounted central air source.

[0038] Specifically, the vehicle-mounted central air source A includes a solenoid valve interface A1, and the solenoid valve interface A1 includes multiple air supply ports A11.

[0039] The filter assembly 1 includes a first slide cylinder 11, an isolation plate 12 disposed inside the first slide cylinder 11, an air supply pipe 13 disposed on the outer wall of the first slide cylinder 11, and molecular sieve cover plates 14 detachably disposed at both ends of the first slide cylinder 11. The molecular sieve cover plates 14 include an air inlet pipe 141, and the air inlet pipe 141 includes an air outlet 1411.

[0040] In this system, the vehicle-mounted central air source A is a device that provides stable and clean compressed air to multiple air-consuming subsystems inside the vehicle through an oil-free scroll air compressor and other equipment. In this configuration, the vehicle-mounted central air source A provides compressed air to the interior of the first slide cylinder 11. Molecular sieve covers 14 are detachably installed at both ends of the first slide cylinder 11. The molecular sieve covers 14 contain sieves for separating nitrogen and oxygen. Simultaneously, an air inlet pipe 141 fixedly connected to the outer wall of the molecular sieve covers 14 is connected to the air supply port A11 in the solenoid valve interface A1 via an air pipe. The air supply switch is controlled by the solenoid valve. Additionally, an opening is made on the outer wall of the air inlet pipe 141... There is an air outlet 1411, which is connected to the inside of the air inlet pipe 141. A pipe is connected to the air outlet 1411, and a silencer is installed inside. The opening and closing of the air outlet 1411 is also controlled by a solenoid valve. An isolation plate 12 is slidably installed inside the first slide cylinder 11, dividing the inside of the first slide cylinder 11 into two cavities. Compressed air is input into the molecular sieve cover plate 14 through the air inlet pipe 141 via the vehicle-mounted central air source A, and enters the first slide cylinder 11 through the internal sieve. As shown in Figure X, the compressed air enters from the left end. As air is introduced, it begins to compress the air at the left end of the first sliding cylinder 11, causing the air pressure to rise continuously. This pushes the internal isolation plate 12 to move to the right. When the isolation plate 12 reaches a certain position, it stops moving, and the gas reaches a dynamic balance between input and output. When the molecular sieve cover plate 14 on the other side needs to work, compressed air is controlled by a solenoid valve to enter the first sliding cylinder 11 from the right end. At this time, the outlet 1411 on the outer wall of the air inlet pipe 141 at the left end is opened, connecting the inside of the air inlet pipe 141 to the outside through the outlet 1411. The air pressure begins to drop, and the sieve inside the molecular sieve cover plate 14... Nitrogen gas is desorbed and discharged to the outside through outlet 1411. Two sets of gas supply pipes 13 are symmetrically arranged on the outer wall of the first slide 11. The gas supply pipes 13 are connected to the oxygen outlet inside the vehicle, and the two ends of the gas supply pipes 13 are distributed at the left and right ends of the isolation plate 12 and extend into the interior of the first slide 11. The advantage of this design is that no matter which side of the isolation plate 12 is generating oxygen, it can be delivered to the other side through the gas supply pipes 13. In this way, while nitrogen gas is desorbed, oxygen passes through the sieve and continuously forms an airflow, which is discharged to the outside through outlet 1411, thus venting as much nitrogen gas as possible from inside the molecular sieve cover plate 14.

[0041] It should be noted that the inner wall of the first sliding cylinder 11 has a groove for the partition plate 12 to slide, so that the partition plate 12 has a range of movement. When it reaches a certain position, the movement of the partition plate 12 will be restricted.

[0042] In summary, during use, the oxygen generator can be installed inside the vehicle body via a screw connection. Compressed air is then supplied to the inside of the first slide cylinder 11 through the vehicle's central air source A. Subsequently, the isolation plate 12 begins to slide. When the isolation plate 12 can no longer slide, the internal air pressure stabilizes, and nitrogen begins to be continuously adsorbed. Oxygen is delivered to the vehicle through the air supply pipe 13. At the same time, some oxygen is delivered to the other end through the supply pipe 131, driving the nitrogen on the other side to flow towards the air outlet 1411. That is, when the vehicle's central air source A supplies compressed air to the left side of the first slide cylinder 11, the air outlet 1411 on the right side opens, and the air inlet pipe 141 closes.

[0043] The advantage of this solution is that it replaces the original three-chamber dual-molecule screening chamber and oxygen output chamber of the oxygen concentrator with a single chamber, which ensures continuous oxygen production while greatly reducing the overall space of the equipment and saving space for vehicle installation. Example

[0044] Reference Figures 1-8 This is the second embodiment of the present invention, which is implemented based on the previous embodiment.

[0045] Specifically, the outer wall of the first slide 11 is provided with fixed ears 111, and the outer wall of the molecular sieve cover plate 14 is provided with fixed ears 111.

[0046] Fixing ears 111 are fixedly installed on the outer walls of both the first slide 11 and the molecular sieve cover plate 14. During installation, the fixing ears 111 on the outer wall of the molecular sieve cover plate 14 are aligned with the fixing ears 111 on the outer wall of the first slide 11, and then the two are connected together with bolts and nuts. The advantage of this design is that it facilitates later maintenance. If there is a sealing problem inside the first slide 11, the first slide 11 can be directly disassembled and replaced. If there is a problem with the sieve, the molecular sieve cover plate 14 or the sieve inside can be directly replaced, which facilitates subsequent maintenance and solves the problem that the oxygen generator occupies space when directly installed and cannot be disassembled for maintenance.

[0047] Preferably, the gas supply pipe 13 includes a connecting pipe 131, and the two ends of the connecting pipe 131 extend into the interior of the first slide cylinder 11, and the two ends are distributed on both sides of the isolation plate 12.

[0048] The gas supply pipe 13 includes a gas outlet pipe 132, which is located in the middle section of the connecting pipe 131.

[0049] The air supply pipe 13 includes a connecting pipe 131 with both ends connected to the inside of the first slide cylinder 11, and an air outlet pipe 132 connected to the middle part of the connecting pipe 131. The air outlet pipe 132 is connected to the inside of the vehicle and is controlled by a valve.

[0050] A two-way valve 15 is installed inside the connecting pipe 131.

[0051] A two-way valve 15 is fixedly installed on the inner wall of the connecting pipe 131. The function of the two-way valve 15 is to ensure that while air flows through the connecting pipe 131 in both directions, the amount of oxygen flowing into the vehicle through the outlet pipe 132 is greater than the amount flowing to the other end. This means that the oxygen switch does not need to be closed; the valve inside the vehicle only needs to be opened and closed.

[0052] Preferably, the two-way valve 15 includes a disc 151, and the disc 151 has a first active channel 1511 and a second active channel 1512 inside, the cross-section of the second active channel 1512 being larger than the cross-section of the first active channel 1511.

[0053] The two-way valve 15 includes a cylindrical disc 151. A first movable channel 1511 and a second movable channel 1512 are connected and extend through both ends of the disc 151. The perforated disc 151 reduces the cross-section of the connecting pipe 131, limiting the gas flow rate per unit time. Therefore, when oxygen is released, it preferentially flows out from the outlet pipe 132. Some oxygen enters the other side through the connecting pipe 131, impacting the sieve and causing the airflow to move towards the outlet 1411, thus better carrying away nitrogen. Simultaneously, this design can guide the airflow rate through movable channels of different cross-sections. Orienting the first movable channel 1511 towards the outlet pipe 132 increases the gas flow rate due to its smaller cross-section. Subsequently, as the gas enters the larger cross-section space and diffuses outwards, the rate decreases again, creating a buffer. This slows down the rate of subsequent gas flow. The two-way valve 15 indirectly reduces the oxygen flow in this passage, ensuring that most of the produced oxygen flows to the outlet pipe 132, maintaining the oxygen content inside the vehicle.

[0054] Preferably, the second movable channel 1512 is provided with a first elastic element 16 inside, and a first inclined surface is provided at the connection between the second movable channel 1512 and the first movable channel 1511;

[0055] A ball valve 17 is installed inside the disc 151.

[0056] In this design, a first elastic element 16 is fixedly installed on the inner wall of the second active channel 1512. The first elastic element 16 is a conical spring, and a ball valve 17 is fixedly connected to the other end of the first elastic element 16. The ball valve 17 can abut against the surface of the first inclined surface, thereby closing the first active channel 1511. In this design, multiple arrays of the first active channels 1511 and the second active channels 1512 are arranged. The number of first active channels 1511 facing the connecting pipe 131 is the same as the number facing the opposite direction. The advantage of this design is that when the two-way valve 15 is used to control the upward flow of oxygen, the internal pressure on the oxygen-generating side rises, opening the ball valve 17, and oxygen is injected into the outlet pipe 132. At the same time, because the outlet pipe 132 is emitting gas, the air pressure between the two two-way valves 15 will decrease, and the oxygen pressure entering the other side for nitrogen discharge through the two-way valve 15 will decrease, pushing the corresponding ball valve 17, reducing the amount of oxygen entering, and promoting the discharge of nitrogen.

[0057] The advantage of this solution is that it replaces the existing electronic valve to control the direction of oxygen flow. Instead, it automatically adjusts the oxygen flow direction through air pressure. After actively controlling the release of oxygen inside the vehicle, the opening and closing of the air inlet pipe 141 and the air outlet 1411 of the molecular sieve cover plate 14 are adjusted by the solenoid valve. The position of the isolation plate 12 is automatically adjusted by air pressure. Moving the position of the isolation plate 12 can temporarily adjust the internal pressure. If the input air pressure is too high, moving the isolation plate 12 can release some space. If the air pressure of moving the isolation plate 12 is insufficient, the isolation plate 12 will not move, and air pressure will begin to accumulate between the isolation plate 12 and the molecular sieve cover plate 14. At the same time, during the movement of the isolation plate 12, it can also compress the space at the other end, causing the space at the other end to flow towards the air outlet 1411. When the isolation plate 12 is stationary, the connecting pipe 131 will replace part of the function of the isolation plate 12, guiding the internal gas flow to the air outlet 1411. Example

[0058] Reference Figures 1-8 This is the third embodiment of the present invention, which is implemented based on the previous embodiment.

[0059] Specifically, the molecular sieve cover plate 14 is provided with a first sliding groove 142 inside, the first sliding groove 142 is provided with an installation component 2 inside, the air inlet pipe 141 is provided with an air inlet head 3 inside, and the air inlet head 3 is connected to the molecular sieve cover plate 14 through the installation component 2.

[0060] The first chute 142 passes through both ends of the molecular sieve cover plate 14. An installation component 2 is installed inside the first chute 142. The air inlet head 3 is connected to the molecular sieve cover plate 14 by the installation component 2. The air inlet head 3 is a connector that connects to one end of the air supply port A11 pipe, so that the pipe and the molecular sieve cover plate 14 are installed separately, replacing the integrated installation of the existing technology. This means that when the vehicle oxygen generator is damaged, it needs to be completely disassembled and replaced.

[0061] Preferably, the mounting assembly 2 includes a first piston rod 21 and a second piston rod 22 respectively disposed at both ends of the first slide groove 142, and the inner wall of the first slide groove 142 near the first slide cylinder 11 is provided with a limiting platform 1421 for limiting the sliding of the first piston rod 21;

[0062] A second slide cylinder 23, which can be used for sliding the second piston rod 22, is fixedly installed on the inner wall of the other end of the first slide groove 142. A limiting rod 24 is slidably provided inside the second slide cylinder 23, and a fixing rod 221 that can push out the limiting rod 24 is provided at one end of the second piston rod 22.

[0063] The air inlet head 3 includes a flange 31, which includes a through hole 311 through which the second slide 23 can pass.

[0064] A first piston rod 21 is slidably mounted on the inner wall of the first chute 142 near the molecular sieve cover plate 14, and a limiting stage 1421 is fixed to the inner wall of the first chute 142 at this end to prevent the first piston rod 21 from sliding out of the first chute 142. Meanwhile, a second piston rod 22 is slidably mounted on the other end of the first chute 142. The advantage of this design is that by sealing the first chute 142, the two piston rods are controlled by the internal air pressure of the first chute 142. For example, during installation, the first piston rod 21 will abut against the surface of the first slide cylinder 11, thus moving inward. At this time, the internal air pressure pushes the second piston rod... The piston rod 22 is pushed outward; at the same time, a second slide cylinder 23 is sleeved on the outside of the second piston rod 22. The second slide cylinder 23 is fixed to the inner wall of the first slide groove 142. A hole is opened laterally in the second slide cylinder 23. Limiting rods 24 slide at both ends of the hole. At the same time, a connecting rod 221 is fixed at the end of the second piston rod 22 near the outside. When the fixing rod 221 is pushed outward, it will push the two limiting rods 24 outward at the same time. During assembly, after the air inlet head 3 is placed on the surface of the molecular sieve cover plate 14, the through hole 311 in the flange 31 passes through the second slide cylinder 23. Then the molecular sieve cover plate 14 is pressed against the surface of the first slide cylinder 11. The first piston rod 21 pushes the air pressure inside the first slide groove 142, pushes the second piston rod 22 to push out the limiting rods 24, and prevents the air inlet head 3 from falling off. Then, the molecular sieve cover plate 14 and the first slide cylinder 11 are connected by bolts and nuts, thereby realizing rapid assembly.

[0065] Preferably, the outer wall of the fixing rod 221 is provided with a second inclined surface 2211, and one end of the fixing rod 221 is provided with a fixing block 222, the fixing block 222 including a third inclined surface 2221;

[0066] The outer wall of the limiting rod 24 is provided with a relief groove 241, which includes a fourth inclined surface 2411 that can fit with the third inclined surface 2221;

[0067] The outer wall of the limiting rod 24 is provided with a fifth inclined surface 242 that can fit with the second inclined surface 2211.

[0068] The fixing rod 221 has a second inclined surface 2211 on its outer wall. The second inclined surface 2211 on the outer wall of the fixing rod 221 fits against the fifth inclined surface 242 on the outer wall of the limiting rod 24. When the fixing rod 221 moves outward, the fifth inclined surface 252 slides against the second inclined surface 2211, and the limiting rod 24 moves outward. At the same time, in order to prevent the structure from falling off, a fixing block 222 is fixedly connected to the end of the fixing rod 221 away from the second piston rod 22. The fixing block 222 extends a third inclined surface 2221 inward. The third inclined surface 2221 fits against the fourth inclined surface on the inner wall of the clearance groove 241. When the second piston rod 22 moves towards the first piston rod 21, the fixing block 222 also moves, and the third inclined surface 2221 slides along the surface of the fourth inclined surface 2411, pulling the limiting rod 24 inward, thereby unlocking the air intake head 3.

[0069] Second elastic element 25 between air inlet head 3 and molecular sieve cover plate 14;

[0070] A sealing gasket 4 is provided between the molecular sieve cover plate 14 and the first sliding cylinder 11.

[0071] A second elastic element 25 is provided between the air inlet head 3 and the molecular sieve cover plate 14. The second elastic element 25 is an airbag. When the air inlet head 3 is installed, the airbag is squeezed, so that the airbag fits against the outer wall of the air inlet head 3 and the inner wall of the molecular sieve cover plate 14, ensuring airtightness. At the same time, the advantage of this design is that when the air inlet head 3 is working, it may encounter bumpy sections, and the air inlet head 3 will vibrate and slide along the outer wall of the second slide cylinder 23, continuously squeezing the airbag. The airbag uses the internal air to repeatedly squeeze and rebound, which can not only ensure airtightness, but also reduce the impact of the air inlet head 3 on the molecular sieve cover plate 14. At the same time, in conjunction with the air inside the first slide groove 142, a slowing effect is achieved. When there is a tendency to move outward, the internal air is stretched, the internal air pressure decreases, and the movement tendency slows down. When movement occurs, the internal air pressure will pull the second piston rod 22 to move inward, and the second elastic element 25 will act as a counteracting force, which can also slow down the movement. At the same time, it is also effective when compressed air is being used for inflation, reducing vibration and wear at the interface caused by compressed gas inflation.

[0072] Meanwhile, a sealing gasket 4 is installed between the molecular sieve cover plate 14 and the first sliding cylinder 11 to ensure airtightness.

[0073] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An oxygen generator based on a vehicle-mounted central air source, characterized in that: The vehicle-mounted central gas source (A) comprises an electromagnetic valve interface (A1), and the electromagnetic valve interface (A1) comprises a plurality of gas supply holes (A11); The filter assembly (1) comprises a first sliding cylinder (11), a separation plate (12) arranged in the first sliding cylinder (11), a gas conveying pipe (13) arranged on the outer wall of the first sliding cylinder (11), and a molecular sieve cover plate (14) detachably arranged at both ends of the first sliding cylinder (11), wherein the molecular sieve cover plate (14) comprises a gas inlet pipe (141), and the gas inlet pipe (141) comprises a gas outlet (1411); The gas conveying pipe (13) comprises a communication pipe (131), and both ends of the communication pipe (131) extend into the first sliding cylinder (11), and both ends are distributed on both sides of the separation plate (12); The gas conveying pipe (13) comprises a gas outlet pipe (132) arranged in the middle section of the communication pipe (131); The communication pipe (131) is internally provided with a two-way valve (15); The two-way valve (15) comprises a disc (151), and the disc (151) is internally provided with a first movable channel (1511) and a second movable channel (1512), wherein the cross section of the second movable channel (1512) is larger than that of the first movable channel (1511); The second movable channel (1512) is internally provided with a first elastic member (16), and the second movable channel (1512) is provided with a first inclined surface at the connection with the first movable channel (1511); The disc (151) is internally provided with a ball valve (17).

2. The on-board central gas source based oxygen generator as claimed in claim 1, wherein: The first sliding cylinder (11) is arrayed with fixing lugs (111) on the outer wall, and the molecular sieve cover plate (14) is provided with fixing lugs (111) on the outer wall.

3. The on-board central gas source based oxygen generator as claimed in claim 2, wherein: The molecular sieve cover plate (14) is internally provided with a first sliding groove (142), the first sliding groove (142) is internally provided with a mounting assembly (2), the gas inlet pipe (141) is internally provided with an air inlet head (3), and the air inlet head (3) is connected with the molecular sieve cover plate (14) through the mounting assembly (2).

4. The on-board central gas source based oxygen generator as claimed in claim 3, wherein: The mounting assembly (2) comprises a first piston rod (21) and a second piston rod (22) arranged at both ends of the first sliding groove (142) respectively, and the inner wall of one end of the first sliding groove (142) close to the first sliding cylinder (11) is provided with a limiting table (1421) for limiting the sliding of the first piston rod (21); The other end of the first sliding groove (142) is fixedly provided with a second sliding cylinder (23) for the sliding of the second piston rod (22), the second sliding cylinder (23) is internally provided with a limiting rod (24) slidingly arranged, and one end of the second piston rod (22) is provided with a fixed rod (221) for pushing out the limiting rod (24); The air inlet head (3) comprises a flange plate (31), and the flange plate (31) comprises a through hole (311) for the second sliding cylinder (23) to pass through.

5. The on-board central gas source based oxygen generator as claimed in claim 4, wherein: The outer wall of the fixed rod (221) is provided with a second inclined surface (2211), one end of the fixed rod (221) is provided with a fixed block (222), and the fixed block (222) comprises a third inclined surface (2221). The outer wall of the limiting rod (24) is provided with an avoiding groove (241), and the avoiding groove (241) comprises a fourth inclined surface (2411) which can be combined with the third inclined surface (2221); The outer wall of the limiting rod (24) is provided with a fifth inclined surface (242) which can be combined with the second inclined surface (2211).

6. The on-board central gas source based oxygen generator as claimed in claim 5, wherein: The air inlet head (3) and the molecular sieve cover plate (14) are provided with a second elastic element (25); The molecular sieve cover plate (14) and the first sliding cylinder (11) are provided with a sealing gasket (4).

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