Oxygen generator with air pressure balancing device

Abstract

This invention relates to an oxygen generator with a pressure balancing device, comprising a molecular sieve tower, a base, and a top seat. The base has a main air inlet, a main nitrogen outlet, and three molecular sieve tower mounting positions, each with an air inlet and a nitrogen outlet. A magnetic coupling control mechanism at the center of the base controls the connection between the base and the main air inlet and nitrogen outlet. The top seat has a main oxygen exhaust pipe and three mounting positions, each with an oxygen exhaust port. A magnetic coupling control mechanism at the center of the top seat controls the connection between the top seat and the pressure equalization pipe. The oxygen exhaust ports are connected to the main oxygen exhaust pipe via flexible hoses. The molecular sieve tower comprises an outer cylinder, a honeycomb inner cylinder, and molecular sieve particles. The honeycomb inner cylinder is composed of hexagonal permeable small cylinders with gaps between adjacent cylinders. The pressure equalization port on the side wall of the outer cylinder is connected to the pressure equalization pipe. This invention uses a magnetic coupling control mechanism instead of multiple solenoid valves, simplifying the structure, reducing the size, and adapting to small oxygen generators. The honeycomb structure and pressure equalization port design achieve rapid pressure equalization, mitigate molecular sieve impact, prevent pulverization, and extend its service life.

Description

Technical Field

[0001] This invention relates to the field of molecular sieve oxygen generator technology, specifically to an oxygen generator with a pressure balancing device. Background Technology

[0002] Molecular sieve oxygen generators are devices that use air as raw material and zeolite molecular sieves as the core adsorption medium. They separate nitrogen and oxygen through room temperature pressure swing adsorption technology and continuously produce high-concentration oxygen. They are currently the mainstream oxygen generation solution in the medical and home oxygen therapy fields.

[0003] In existing technologies, molecular sieve oxygen generators typically employ alternating operation of two or three towers. Taking a three-tower model as an example, the working process of the three molecular sieve towers is as follows: Tower A adsorption, Tower C desorption, Tower B waiting → Tower A adsorption, Tower A pressure equalization to Tower B, Tower C waiting → Tower B adsorption, Tower A desorption, Tower C waiting → Tower B adsorption, Tower B pressure equalization to Tower C, Tower A waiting. During the above operation, at the end of the desorption phase of each tower, oxygen-enriched gas is provided to the currently adsorbing molecular sieve tower to backflush the desorption tower, thoroughly removing residual nitrogen and ensuring the adsorption effect of the molecular sieve towers on nitrogen.

[0004] In existing technologies, the inlet and outlet of molecular sieve oxygen generators, as well as pressure equalization, are all controlled by solenoid valves. In particular, three-tower oxygen generators have even more solenoid valves, resulting in a large volume of solenoid valves. Existing technologies for molecular sieve oxygen generators achieve pressure equalization and backflushing by inputting oxygen-enriched gas from the oxygen outlet in reverse into the molecular sieve cylinder to be pressure equalized or backflushed. The repeated impact of inlet oxygen generation, backflushing nitrogen removal, and reverse pressure equalization on the internal molecular sieve particles can easily lead to the pulverization and failure of the molecular sieve particles at both ends, shortening their service life. Moreover, during reverse pressure equalization, the oxygen-enriched gas must pass through the gaps between each molecular sieve particle and can only flow through the gaps in one direction (from top to bottom or from bottom to top), resulting in slow gas flow and affecting the pressure equalization speed. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned technical problems and provide an oxygen generator with a pressure balancing device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an oxygen generator with a pressure balancing device, comprising a molecular sieve tower, a base, and a top seat. The base is provided with a main air inlet and a main nitrogen outlet. A main oxygen outlet pipe is provided above the top seat. The molecular sieve tower comprises an outer cylinder, a honeycomb inner cylinder, and molecular sieve particles. The honeycomb inner cylinder is composed of multiple hexagonal small cylinders through which gas can pass. The molecular sieve particles are packed inside the small cylinders, and gaps are provided between adjacent small cylinders for gas to pass through. A pressure equalization port is provided on the side wall of the outer cylinder, and a pressure equalization pipe is connected to it. Three safety devices are provided along the circumferential direction on both the base and the top seat. The mounting positions are used to install three molecular sieve towers. Each mounting position on the base is equipped with an air inlet and a nitrogen outlet. At the center of the base is a magnetic coupling control mechanism 1 for controlling the air intake and exhaust of each molecular sieve tower. Multiple air inlets and nitrogen outlets are connected to the main air inlet and main nitrogen outlet through the magnetic coupling control mechanism 1. Each mounting position on the top seat is equipped with an oxygen outlet. At the center of the top seat is a magnetic coupling control mechanism 2 for controlling the oxygen output and pressure equalization of each molecular sieve tower. Multiple oxygen outlets are connected to the pressure equalization pipe through the magnetic coupling control mechanism 2. Multiple oxygen outlets are connected to the main oxygen outlet pipe through flexible hoses.

[0007] Furthermore, the base has a control chamber 1 in the middle, and a plurality of gas channels 1 are provided on one side wall of the control chamber. The gas channels 1 connect the multiple air inlets and nitrogen exhaust ports to the control chamber 1. The bottom wall of the control chamber 1 has a plurality of gas channels 2 and gas channels 3. The first end of the gas channel 2 is aligned with the gas channel 1 corresponding to the air inlet, and the first end of the gas channel 3 is aligned with the gas channel 1 corresponding to the nitrogen exhaust port. The other ends of the multiple gas channels 2 are connected to the main air inlet, and the other ends of the multiple gas channels 3 are connected to the main nitrogen exhaust port.

[0008] Furthermore, the magnetic coupling control mechanism includes a motor and a matching magnetic coupling drive and a magnetic coupling valve body. The magnetic coupling drive is fixed on the output shaft of the motor and located above the control chamber. The magnetic coupling valve body is rotatably disposed in the control chamber. The magnetic coupling valve body has a notch 1 and a notch 2 on one side wall. Rotation of the magnetic coupling valve body can cause the notch 1 and the notch 2 to intermittently align with the air inlet and the nitrogen outlet, thereby realizing the air intake and nitrogen discharge of the three molecular sieve towers.

[0009] Furthermore, the top seat has a control chamber two in the middle, and multiple branch channels are provided on the side wall of the control chamber two. The oxygen exhaust port is connected to the control chamber two through the branch channels. Multiple gas channels four are provided on the bottom wall of the control chamber two. The first end of the multiple gas channels four is located between two adjacent branch channels, and the other end is connected to the equalizing pipe.

[0010] Furthermore, the magnetic coupling control mechanism 2 includes a motor 2, a magnetic coupling drive 2, and a magnetic coupling valve body 2. The magnetic coupling drive 2 is fixed on the output shaft of the motor 2 and located above the control cavity 2. The magnetic coupling valve body 2 is rotatably disposed inside the control cavity 2. The magnetic coupling valve body 2 is provided with a gas channel 5. The gas channel 5 has three ports, one of which corresponds to the branch channel, and the other two ports correspond to the gas channel 5.

[0011] Furthermore, the hose is equipped with a one-way valve. The one-way valve is open from the oxygen vent to the main oxygen vent pipe.

[0012] Furthermore, the bottom of the honeycomb inner cylinder is provided with a support plate, which is fixed inside the outer cylinder. The support plate has a hollow structure corresponding to the small cylinder, and a cavity is provided below the support plate.

[0013] Furthermore, a top pressure plate is provided between the top of the outer cylinder and the top seat. The bottom of the top pressure plate has a groove along the gap, and a sealing gasket is installed inside the groove. The top of the small cylinder is in close contact with the sealing gasket. The bottom of the top pressure plate is provided with a pressing mechanism corresponding to the inside of the small cylinder, which is used to compact the molecular sieve particles.

[0014] Furthermore, the clamping mechanism includes a spring and a breathable pressure plate, with the upper and lower ends of the spring fixedly connected to the top pressure plate and the breathable pressure plate, respectively.

[0015] Furthermore, the base has multiple uprights along the circumference of each molecular sieve cylinder. The outer cylinder, top pressure plate, and top seat are all provided with mounting through holes, and are sequentially installed on the uprights through the mounting through holes. The top of the uprights is connected to a fastening nut by a thread, and is fixed by the fastening nut.

[0016] Furthermore, there are six equal pressure equalizing ports, which are evenly distributed around the outer cylinder, and the equal pressure equalizing pipe is connected to all six equal pressure equalizing ports.

[0017] The beneficial effects of the present invention are as follows: In the oxygen generator with pressure balancing device of the present invention, the pressure equalization structure of the molecular sieve tower is integrated on the base and the top seat. The magnetic coupling control mechanism one and the magnetic coupling control mechanism two replace a large number of solenoid valves, thereby simplifying the device structure, reducing the size, avoiding the large space occupied by too many solenoid valves, and adapting to the design requirements of small molecular sieve oxygen generators.

[0018] The molecular sieve tower of the present invention adopts a honeycomb inner cylinder structure, forming a uniform gas flow gap between adjacent small cylinders, and the pressure equalization port is set on the outer cylinder, which can quickly diffuse to various areas inside the molecular sieve tower through the gap, greatly accelerating the pressure equalization speed and achieving rapid pressure equalization, thereby shortening the oxygen production cycle.

[0019] In this invention, the oxygen-enriched gas used for pressure equalization enters between the molecular sieve particles from around the small cylinder, effectively alleviating the repeated impacts on the molecular sieve particles during the switching between traditional air intake oxygen generation and reverse pressure equalization, avoiding pulverization at both ends of the molecular sieve particles, and extending the service life of the molecular sieve particles. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of an oxygen generator with a pressure balancing device according to the present invention;

[0021] Figure 2 This is an exploded view of an oxygen generator with a pressure balancing device according to the present invention; Figure 3 This is a schematic diagram of the base of an oxygen generator with a pressure balancing device according to the present invention; Figure 4 This is an exploded view of the base of an oxygen generator with a pressure balancing device according to the present invention; Figure 5 This is a perspective view of the base of an oxygen generator with a pressure balancing device according to the present invention; Figure 6 This is a schematic diagram of the internal structure of the magnetic coupling valve body and control chamber 1 during the adsorption of tower A, desorption or backflushing of tower C, and waiting state of tower B; Figure 7 This is a schematic diagram of the internal structure of the magnetic coupling valve body and control chamber 1 under the following conditions: adsorption in tower A, desorption in tower C, end of backflushing, and pressure equalization in tower B. Figure 8 This is an exploded view of the molecular sieve tower in an oxygen generator with a pressure balancing device according to the present invention. Figure 9 yes Figure 8 Enlarged view of section A; Figure 10 This is an exploded view of the top cover of an oxygen generator with a pressure balancing device according to the present invention, viewed from below. Figure 11 This is an exploded view of the top cover of an oxygen generator with a pressure balancing device according to the present invention. Figure 12 This is a perspective view of the top cover and magnetically coupled valve body 2 in an oxygen generator with a pressure balancing device according to the present invention. Figure 13 This is a schematic diagram of the internal structure of the magnetic coupling valve body 2 and control chamber 2 under the conditions of adsorption in tower A, desorption in tower C, and waiting in tower B; Figure 14 This is a schematic diagram of the internal structure of the magnetic coupling valve body 2 and control chamber 2 under the conditions of adsorption in tower A, backflushing in tower C, and waiting in tower B; Figure 15 This is a schematic diagram of the internal structure of the magnetic coupling valve body and control chamber 2 during the adsorption process in tower A, the pressure equalization process in tower B, and the waiting state in tower C.

[0022] 1. Molecular sieve tower; 1.1 Outer cylinder; 1.11 Pressure equalization port; 1.12 Pressure equalization pipe; 1.2 Honeycomb inner cylinder; 1.21 Small cylinder; 1.3 Gap; 1.4 Top pressure plate; 1.41 Groove; 1.42 Sealing gasket; 1.43 Through hole; 2. Base; 2.1 Gas inlet; 2.2 Nitrogen vent; 2.3 Control chamber one; 2.31 Gas channel one; 2.32 Gas channel two; 2.33 Gas channel three; 3. Top seat; 3.1 Oxygen vent; 3.2 Control chamber two; 3.21 Branch channel; 3.22 Gas channel four; 4. 1. Main air inlet; 5. Main nitrogen vent; 6. Main oxygen vent; 7. Magnetic coupling control mechanism one; 7.1. Motor one; 7.2. Magnetic coupling drive component one; 7.3. Magnetic coupling valve body one; 7.31. Notch one; 7.32. Notch two; 8. Magnetic coupling control mechanism two; 8.1. Motor two; 8.2. Magnetic coupling drive component two; 8.3. Magnetic coupling valve body two; 8.31. Gas passage five; 9. Hoses; 10. Check valve; 11. Support plate; 12. Clamping mechanism; 12.1. Spring; 12.2. Ventilation pressure plate; 13. Upright pole; 14. Mounting through hole; 15. Fastening nut. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0024] The molecular sieve oxygen generator mainly includes an air filtration mechanism, an air compressor, a heat dissipation mechanism, a molecular sieve tower, an oxygen storage tank, and an oxygen output mechanism. The innovation of this invention lies mainly in the molecular sieve tower. The magnetic coupling control mechanism 7 and the magnetic coupling control mechanism 8 control the opening and closing of each air port on the molecular sieve to achieve adsorption, desorption, backflushing, and pressure equalization. This reduces the size of the device, enables rapid pressure equalization, and effectively protects the molecular sieve particles from pulverization. The remaining structures are existing technologies and will not be described in detail here.

[0025] Embodiments of the present invention: such as Figure 1 , 2As shown in Figure 8, an oxygen generator with a pressure balancing device includes a molecular sieve tower 1, a base 2, and a top seat 3. The base 2 has a main air inlet 4 and a main nitrogen outlet 5. The top seat 3 has a main oxygen outlet pipe 6. The molecular sieve tower 1 includes an outer cylinder 1.1, a honeycomb inner cylinder 1.2, and molecular sieve particles. The honeycomb inner cylinder 1.2 is composed of multiple hexagonal small cylinders 1.21 through which gas can pass. The molecular sieve particles are installed inside the small cylinders 1.21, and gaps 1.3 are provided between adjacent small cylinders 1.21 for gas passage. The outer cylinder 1.1 has a pressure equalization port 1.11 on its side wall, to which a pressure equalization pipe 1.12 is connected. Both the base 2 and the top seat 3 have three mounting positions along the circumference for... Three molecular sieve towers 1 are installed. Each of the installation positions on the base 2 is equipped with an air inlet 2.1 and a nitrogen outlet 2.2. The center of the base 2 is equipped with a magnetic coupling control mechanism 7 for controlling the air intake and exhaust of each molecular sieve tower 1. The multiple air inlets 2.1 and nitrogen outlets 2.2 are connected to the main air inlet 4 and the main nitrogen outlet 5 through the magnetic coupling control mechanism 7. Each of the installation positions on the top seat 3 is equipped with an oxygen outlet 3.1. The center of the top seat 3 is equipped with a magnetic coupling control mechanism 8 for controlling the oxygen output and pressure equalization of each molecular sieve tower 1. The multiple oxygen outlets 3.1 are connected to the pressure equalization pipe 1.12 through the magnetic coupling control mechanism 8. The multiple oxygen outlets 3.1 are all connected to the main oxygen exhaust pipe 6 through a flexible hose 9.

[0026] The above structure enables rapid switching of air intake and exhaust, oxygen output, backflushing, and pressure equalization in the three towers, reducing the device size and achieving rapid pressure equalization. Specifically, the magnetic coupling control mechanism 7 connects the air inlet 2.1 and nitrogen outlet 2.2 of each molecular sieve tower 1 to the total air inlet 4 and total nitrogen outlet 5, achieving switching control of air intake and exhaust. The magnetic coupling control mechanism 8 connects multiple oxygen outlets 3.1 to the pressure equalization pipe 1.12, achieving switching of oxygen output, pressure equalization, and backflushing. Since the resistance of gas flowing through the gaps between the multiple small cylinders 1.21 on the honeycomb inner cylinder 1.2 is much smaller than the resistance of the gaps 1.3 between the molecular sieve particles, the pressure equalization and oxygen-enriched gas can be rapidly distributed to various areas inside the molecular sieve tower, causing the internal gas pressure of the molecular sieve tower 1 to rise rapidly. The small cylinders 1.21 are permeable, thereby expanding the gas receiving area and allowing the oxygen-enriched gas distributed in the gaps to quickly enter the gaps between the molecular sieve particles, achieving rapid pressure equalization.

[0027] like Figure 2-5As shown, the base 2 has a control chamber 2.3 in the middle. The side wall of the control chamber 2.3 has multiple gas channels 2.31. The gas channels 2.31 connect multiple air inlets 2.1 and nitrogen outlets 2.2 to the control chamber 2.3. The bottom wall of the control chamber 2.3 has multiple gas channels 2.32 and 3.33. The first end of the gas channel 2.32 is aligned with the gas channel 2.31 corresponding to the air inlet 2.1. The first end of the gas channel 3.33 is aligned with the gas channel 2.31 corresponding to the nitrogen outlet 2.2. The other end of the multiple gas channels 2.32 is connected to the main air inlet 4. The other end of the multiple gas channels 3.33 is connected to the main nitrogen outlet 5.

[0028] It is worth noting that: multiple gas channels 1 2.31 are evenly distributed along the circumference, and multiple gas channels 2.32 and 3 2.33 are evenly distributed along the circumference, with gas channels 2.32 and 3 2.33 being staggered.

[0029] The magnetic coupling control mechanism 7 includes a motor 7.1 and a matching magnetic coupling drive 7.2 and a magnetic coupling valve body 7.3. The magnetic coupling drive 7.2 is fixed on the output shaft of the motor 7.1 and located above the control chamber 2.3. The magnetic coupling valve body 7.3 is rotatably disposed in the control chamber 2.3. The side wall of the magnetic coupling valve body 7.3 is provided with a notch 7.31 and a notch 7.32. The rotation of the magnetic coupling valve body 7.3 can cause the notch 7.31 and the notch 7.32 to be intermittently aligned with the air inlet 2.1 and the nitrogen outlet 2.2, so as to realize the air intake and nitrogen discharge of the three molecular sieve towers 1.

[0030] It is worth noting that permanent magnets (not shown in the figure) are embedded inside the magnetic coupling drive component 7.2, the magnetic coupling valve body 7.3, and the magnetic coupling drive component 8.2 and the magnetic coupling valve body 8.3 described below. The magnetic pole distribution structure of the permanent magnet in the magnetic coupling mechanism is existing technology and will not be described in detail here. The magnetic coupling power transmission mechanism is suitable for use in applications with high airtightness requirements. In this invention, the control chamber 2.3 and the control chamber 3.2 are both in environments with high airtightness requirements (in the figure, the control chamber 2.3 and the control chamber 3.2 are sealed by cover installation to form a sealed chamber. Alternatively, the cover can be directly welded to the base 2 or the top seat 3 to form a sealed chamber, but attention should be paid to the smoothness of the weld to ensure that the magnetic coupling valve body can rotate smoothly and seal properly inside).

[0031] It is worth noting that both Motor 1 (7.1) and Motor 2 (8.1) are servo motors, whose rotation angle is controlled by commands issued by a microcontroller.

[0032] The above structure allows for rapid and orderly switching of the gas inlet and nitrogen outlet of each molecular sieve column 1; specifically, as shown in the figure... Figure 4 As shown, notch 1 (7.31) is a relatively long arc, and the length of notch 2 (7.32) corresponds to the diameters of gas channels 1 (2.31), 2 (2.32), and 3 (2.33), respectively. Figure 6 As shown, when the first end of notch 7.31 is aligned with one of the gas channels 2.31 (for example, gas channel 2.31 corresponds to the inlet of tower A), notch 7.32 is aligned with the adjacent gas channel 2.31 in the counterclockwise direction (gas channel 2.31 corresponds to the nitrogen outlet of tower C), that is, tower A is in the adsorption state, tower C is in the desorption or backflushing state, and tower B is in the waiting state; Figure 7 As shown, when the magnetic coupling valve body 7.3 rotates to the point where the end of the notch 7.31 aligns with the gas channel 2.31 (which corresponds to the inlet of tower A), no gas channel aligns with the notch 7.32. This means that tower A is in the adsorption state, tower C is in the desorption state, backflushing is complete, and tower B is in the pressure equalization state. The first rotation angle of the magnetic coupling valve body 7.3 corresponds to the angle of the notch 7.31. The second rotation angle is 120° minus the first rotation angle. The third rotation angle is the same as the first rotation angle. The fourth rotation angle is the same as the second rotation angle. This cycle is repeated to achieve the switching of the working state of each molecular sieve tower 1.

[0033] like Figure 11 , 12 As shown, the top seat 3 has a control chamber 2 3.2 in the middle. The side wall of the control chamber 2 3.2 has multiple branch channels 3.21. The oxygen exhaust port 3.1 is connected to the control chamber 2 3.2 through the branch channels 3.21. The bottom wall of the control chamber 2 3.2 has multiple gas channels 4 3.22. The first end of the multiple gas channels 4 3.22 is located between two adjacent branch channels 3.21, and the other end is connected to the equalizing pipe 1.12.

[0034] The magnetic coupling control mechanism 28 includes a motor 28.1, a magnetic coupling drive component 28.2, and a magnetic coupling valve body 28.3. The magnetic coupling drive component 28.2 is fixed on the output shaft of the motor 28.1 and located above the control cavity 23.2. The magnetic coupling valve body 28.3 is rotatably disposed within the control cavity 23.2. The magnetic coupling valve body 28.3 is provided with a gas channel 58.31. The gas channel 58.31 has three ports, one of which corresponds to the branch channel 321, and the other two ports correspond to the gas channel 58.31.

[0035] It is worth noting that: multiple branch channels 3.21 are evenly distributed along the circumference, multiple gas channels 3.22 are evenly distributed along the circumference, and the angle between branch channels 3.21 and gas channels 3.22 is 60 degrees.

[0036] It is worth noting that the surfaces of the magnetic coupling valve body 1 (7.3), the control chamber 1 (2.3), the magnetic coupling valve body 2 (8.3), and the control chamber 2 (3.2) are smooth and tightly fitted to achieve a seal.

[0037] The above structure allows for rapid and orderly switching of the oxygen outlet and pressure equalization port of each molecular sieve tower 1; for example... Figure 12 As shown, the first end of gas channel 5 8.31 is a long arc-shaped opening, and the diameters of the other two ports match the diameter of gas channel 4 3.22, as shown. Figure 13 As shown, in the initial state, none of the three ports are aligned; that is, tower A is in the adsorption state, tower C is in the desorption state, and tower B is in the waiting state. Figure 14 As shown, when the first port is aligned with one of the branch channels 3.21 (for example, this branch channel 3.21 corresponds to the oxygen outlet of tower A), the second port is aligned with a gas channel four (this gas channel four 3.22 corresponds to the pressure equalization port of tower C), and no gas channel is aligned with the third port. That is, tower A is in the adsorption state, tower C is in the backflushing state, and tower B is in the waiting state. Figure 15 As shown, when the end of the first port is aligned with the aforementioned branch channel 3.21 (which corresponds to the oxygen outlet of tower A), no gas channel is aligned with the second port, and the third port is aligned with a gas channel 3.22 (which corresponds to the pressure equalization port of tower B). That is, tower A is in the adsorption state, tower B is in the pressure equalization state, and tower C is in the waiting state. When the magnetic coupling valve body 8.3 rotates, the first rotation angle is recorded as ∠1, the second rotation is 30°, the third rotation angle is 120° minus 30° minus ∠1, the fourth rotation angle is the same as the first rotation angle, the fifth rotation angle is the same as the second, the sixth rotation angle is the same as the third, and so on in a cycle.

[0038] like Figure 1 , 2 As shown, the hose 9 is equipped with a one-way valve 10. Specifically, the one-way valve 10 is directed from the oxygen vent 3.1 to the main oxygen vent 6.

[0039] The above structure can prevent oxygen from flowing back into the molecular sieve tower 1 from the oxygen storage tank.

[0040] like Figure 8 As shown, the bottom of the honeycomb inner cylinder 1.2 is provided with a support plate 11, which is fixed inside the outer cylinder 1.1. The support plate 11 has a hollow structure corresponding to the small cylinder 1.21, and a cavity is provided below the support plate 11.

[0041] With the above structure, during adsorption oxygen production, the high-pressure gas source enters from the bottom of the small cylinder 1.21, where nitrogen is adsorbed by the internal molecular sieve particles, and then oxygen is discharged; during nitrogen discharge, the high-pressure gas above the support plate 11 is discharged into the cavity from the bottom of the small cylinder 1.21 and then discharged from the nitrogen discharge port; during backflushing, the high-pressure oxygen-enriched gas enters from the side wall of the small cylinder 1.21 and is discharged from its bottom.

[0042] like Figure 9 , 10 As shown, a top pressure plate 1.4 is provided between the top of the outer cylinder 1.1 and the top seat 3. The bottom of the top pressure plate 1.4 is provided with a groove 1.41 along the gap 1.3. A sealing gasket 1.42 is installed inside the groove 1.41. The top of the small cylinder 1.21 is in close contact with the sealing gasket 1.42. The bottom of the top pressure plate 1.4 is provided with a pressing mechanism 12 corresponding to the inside of the small cylinder 1.21, which is used to compact the molecular sieve particles. A through hole 1.43 is provided on the top pressure plate 1.4 corresponding to the inside of each small cylinder 1.21.

[0043] like Figure 9 , 10 As shown, the pressing mechanism 12 includes a spring 12.1 and a breathable pressure plate 12.2. The upper and lower ends of the spring 12.1 are fixedly connected to the top pressure plate 1.4 and the breathable pressure plate 12.2, respectively.

[0044] It is worth noting that each mounting position on base 2 and top seat 3 is equipped with a sealing ring to achieve a seal between the top pressure plate, the bottom of the outer cylinder and the mounting position, preventing gas leakage. A sealing ring is also provided on the bottom edge of the top pressure plate.

[0045] The above structure ensures that the molecular sieve particles are compacted, the seal is maintained, and oxygen is allowed to escape smoothly. Specifically, the spring 12.1 applies a downward thrust to the air-permeable pressure plate 12.2, which compacts the molecular sieve particles. The sealing gasket 1.42 at the bottom of the top pressure plate 1.4 seals the small cylinder 1.21 with the top pressure plate 1.4, ensuring that the high-pressure air in the gap 1.3 must be adsorbed by the molecular sieve particles before it can be discharged into the oxygen vent 3.1.

[0046] like Figure 1 , 2 As shown, the base 2 has multiple uprights 13 along the circumference of each molecular sieve tower 1. The outer cylinder 1.1, the top pressure plate 1.4, and the top seat 3 are all provided with mounting through holes 14, and the uprights 13 are installed sequentially through the mounting through holes 14. The top of the uprights is connected to a fastening nut 15 by a thread, and the fastening nut 15 is used to fix them.

[0047] The above structure ensures that when the top pressure plate 1.4 is installed, the ventilated pressure plate 12.2 can be aligned with the small cylinder 1.21.

[0048] like Figure 1 , 2 As shown in Figures 8 and 9, there are six equal-spaced pressure equalization ports 1.11, which are distributed around the outer cylinder 1.1. The pressure equalization pipe 1.12 is connected to all six pressure equalization ports 1.11. The pressure equalization ports 1.11 can be set at any height on the side wall of the outer cylinder 1.1, preferably in the middle of the outer cylinder 1.1.

[0049] The above structure allows the pressure-equalizing gas to enter uniformly from all sides of the molecular sieve tower 1.

[0050] The table below shows the working status of each molecular sieve tower 1 and the opening / closing status of each air vent in this oxygen generator.

Claims

1. An oxygen generator with a pressure balancing device, comprising a molecular sieve tower (1), a base (2) and a top seat (3), wherein the base (2) is provided with a main air inlet (4) and a main nitrogen outlet (5), and the top seat (3) is provided with a main oxygen outlet pipe (6), characterized in that: The molecular sieve tower (1) includes an outer cylinder (1.1), a honeycomb inner cylinder (1.2), and molecular sieve particles. The honeycomb inner cylinder (1.2) is composed of multiple hexagonal small cylinders (1.21) through which gas can pass. The molecular sieve particles are installed inside the small cylinders (1.21), and gaps (1.3) are provided between adjacent small cylinders (1.21) to allow gas to pass through. The outer cylinder (1.1) has a pressure equalization port (1.11) on its side wall, which is connected to a pressure equalization pipe (1.12). The base (2) and the top seat (3) each have three mounting positions along the circumferential direction for mounting three molecular sieve towers (1). Each mounting position on the base (2) has an air inlet (2.1) and a nitrogen vent (2.2). The base (2) is provided with a magnetic coupling control mechanism 1 (7) for controlling the air intake and exhaust of each molecular sieve tower (1). Multiple air inlets (2.1) and nitrogen outlets (2.2) are connected to the main air inlet (4) and the main nitrogen outlet (5) through the magnetic coupling control mechanism 1 (7). Each of the mounting positions on the top seat (3) is provided with an oxygen outlet (3.1). The top seat (3) is provided with a magnetic coupling control mechanism 2 (8) for controlling the oxygen output and pressure equalization of each molecular sieve tower (1). Multiple oxygen outlets (3.1) are connected to the pressure equalization pipe (1.12) through the magnetic coupling control mechanism 2 (8). Multiple oxygen outlets (3.1) are connected to the main oxygen outlet pipe (6) through a hose (9).

2. An oxygen generator with a pressure balancing device according to claim 1, characterized in that: The base (2) is provided with a control chamber (2.3) in the middle. Multiple gas channels (2.31) are provided on the side wall of the control chamber (2.3). Multiple air inlets (2.1) and nitrogen outlets (2.2) are connected to the control chamber (2.3) through the gas channels (2.31). Multiple gas channels (2.32) and gas channels (2.33) are provided on the bottom wall of the control chamber (2.3). The first end of the gas channel (2.32) is aligned with the gas channel (2.31) corresponding to the air inlet (2.1). The first end of the gas channel (2.33) is aligned with the gas channel (2.31) corresponding to the nitrogen outlet (2.2). The other end of the multiple gas channels (2.32) is connected to the main air inlet (4). The other end of the multiple gas channels (2.33) is connected to the main nitrogen outlet (5).

3. An oxygen generator with a pressure balancing device according to claim 2, characterized in that: The magnetic coupling control mechanism 1 (7) includes a motor 1 (7.1) and a matching magnetic coupling drive 1 (7.2) and a magnetic coupling valve body 1 (7.3). The magnetic coupling drive 1 (7.2) is fixed on the output shaft of the motor 1 (7.1) and located above the control chamber 1 (2.3). The magnetic coupling valve body 1 (7.3) is rotatably installed in the control chamber 1 (2.3). The side wall of the magnetic coupling valve body 1 (7.3) is provided with a notch 1 (7.31) and a notch 2 (7.32). The rotation of the magnetic coupling valve body 1 (7.3) can make the notch 1 (7.31) and the notch 2 (7.32) intermittently aligned with the air inlet (2.1) and the nitrogen outlet (2.2) to realize the air intake and nitrogen discharge of the three molecular sieve towers (1).

4. An oxygen generator with a pressure balancing device according to claim 1, characterized in that: The top seat (3) is provided with a control chamber two (3.2) in the middle. Multiple branch channels (3.21) are provided on the side wall of the control chamber two (3.2). The oxygen exhaust port (3.1) is connected to the control chamber two (3.2) through the branch channels (3.21). Multiple gas channels four (3.22) are provided on the bottom wall of the control chamber two (3.2). The first end of the multiple gas channels four (3.22) is located between two adjacent branch channels (3.21), and the other end is connected to the equalizing pipe (1.12).

5. An oxygen generator with a pressure balancing device according to claim 4, characterized in that: The magnetic coupling control mechanism two (8) includes a motor two (8.1), a magnetic coupling drive two (8.2), and a magnetic coupling valve body two (8.3). The magnetic coupling drive two (8.2) is fixed on the output shaft of the motor two (8.1) and located above the control cavity two (3.2). The magnetic coupling valve body two (8.3) is rotatably disposed in the control cavity two (3.2). The magnetic coupling valve body two (8.3) is provided with a gas channel five (8.31). The gas channel five (8.31) has three ports, one of which corresponds to the branch channel (3.21), and the other two ports correspond to the gas channel five (8.31).

6. An oxygen generator with a pressure balancing device according to claim 1, characterized in that: The hose (9) is equipped with a one-way valve (10). The one-way valve (10) is directed from the oxygen vent (3.1) to the main oxygen vent (6).

7. An oxygen generator with a pressure balancing device according to claim 1, characterized in that: The honeycomb inner cylinder (1.2) is provided with a support plate (11) at the bottom, which is fixed inside the outer cylinder (1.1). The support plate (11) has a hollow structure corresponding to the small cylinder (1.21), and a cavity is provided below the support plate (11).

8. An oxygen generator with a pressure balancing device according to claim 1, characterized in that: A top pressure plate (1.4) is provided between the top of the outer cylinder (1.1) and the top seat (3). The bottom of the top pressure plate (1.4) is provided with a groove (1.41) along the gap (1.3). A sealing gasket (1.42) is installed inside the groove (1.41). The top of the small cylinder (1.21) is in close contact with the sealing gasket (1.42). The bottom of the top pressure plate (1.4) and the small cylinder (1.21) are both provided with a pressing mechanism (12) to compact the molecular sieve particles. The pressing mechanism (12) includes a spring (12.1) and a breathable pressing plate (12.2). The upper and lower ends of the spring (12.1) are fixedly connected to the top pressure plate (1.4) and the breathable pressing plate (12.2) respectively.

9. An oxygen generator with a pressure balancing device according to claim 8, characterized in that: The base (2) has multiple uprights (13) on the top of each molecular sieve cylinder along the circumference. The outer cylinder (1.1), the top pressure plate (1.4), and the top seat (3) are all provided with mounting through holes (14), and are installed on the uprights (13) in sequence through the mounting through holes (14). The top of the uprights is connected to a fastening nut (15) by a thread, and is fixed by the fastening nut (15).

10. An oxygen generator with a pressure balancing device according to claim 1, characterized in that: The equalizing ports (1.11) are provided in six places and are distributed at equal intervals around the outer cylinder (1.1). The equalizing pipe (1.12) is connected to all six equalizing ports (1.11).

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