An integrated adsorption tower for oxygen generators

Abstract

This application provides an integrated adsorption tower for an oxygen generator, comprising an inlet integrated cover, an adsorption tower, an outlet integrated cover, and a reversing valve for switching gas paths. The adsorption tower includes a first molecular sieve cylinder, a second molecular sieve cylinder, and a gas storage tank, with the gas storage tank positioned between the first and second molecular sieve cylinders. Corresponding sealing caps are provided on the inlet and outlet integrated covers, and the reversing valve is connected to the inlet integrated cover. By integrating the molecular sieve cylinder and the gas storage tank together and providing corresponding sealing caps on the inlet and outlet integrated covers, a sealed fit between the adsorption tower and the inlet and outlet integrated covers can be achieved, simplifying the overall structure and reducing the number of parts. By integrating the gas pipeline and valve body inside the inlet and outlet integrated covers, the assembly process eliminates the need for connecting pipelines, reducing assembly difficulty, decreasing the overall size, and improving space utilization.

Description

Technical Field

[0001] This application relates to the field of oxygen generator technology, and in particular to an integrated adsorption tower for an oxygen generator. Background Technology

[0002] Pressure swing adsorption (PSA) oxygen generation technology, as a highly efficient and convenient method for oxygen production, has been widely used in various fields such as medical emergency care, industrial production, and home healthcare. Its core principle utilizes the selective adsorption characteristics of molecular sieves for nitrogen and oxygen in the air, achieving oxygen-nitrogen separation through alternating pressurization and depressurization. Under pressurization, the molecular sieve preferentially adsorbs nitrogen, allowing the unadsorbed oxygen to be collected; when the molecular sieve is in a depressurized environment, the previously adsorbed nitrogen is released, and the molecular sieve is regenerated, preparing for the next oxygen generation cycle.

[0003] To ensure continuous oxygen production, existing oxygen generators generally employ a parallel operation mode with two adsorption towers. With precise timing control via a PLC program, while one adsorption tower is performing pressurized adsorption, the other simultaneously performs depressurized desorption, ensuring the continuity of the oxygen production process through the alternating operation of the two towers. However, this traditional structure has gradually revealed many limitations in practical applications.

[0004] First, the separate setup of the two adsorption towers makes it difficult to maintain a high degree of consistency in key parameters such as the performance of the molecular sieves inside and the airflow distribution, which affects the synchronicity of the working states of the two towers, and consequently leads to fluctuations in oxygen purity and a decrease in equipment operating stability.

[0005] Secondly, the independent dual adsorption tower design requires a large number of auxiliary parts such as connecting pipes, valves, and fixed supports, which not only increases material costs but also makes the production and assembly process cumbersome, greatly reducing production efficiency and hindering large-scale mass production.

[0006] Furthermore, since the two adsorption towers need to be combined into a whole system through special connecting parts, this places high demands on the machining accuracy of the parts, which significantly increases the complexity of the process, the difficulty of machining and assembly, and indirectly increases the manufacturing cost and failure risk of the equipment.

[0007] Finally, the independent arrangement of the dual adsorption towers and the presence of numerous connecting components require more space to be reserved for the overall assembly of the equipment. This not only increases the size of the oxygen generator and reduces space utilization, but also limits its application expansion in miniaturized and portable scenarios.

[0008] Against this backdrop, optimizing the adsorption tower and its upper and lower cover structures has become an urgent problem to be solved. Utility Model Content

[0009] The purpose of this application is to provide an integrated adsorption tower for oxygen generators that is compact in structure, easy to manufacture and assemble, and saves space.

[0010] To achieve the above objectives, this application provides an integrated adsorption tower for an oxygen generator, characterized in that it includes a first molecular sieve cylinder, a second molecular sieve cylinder, a gas storage tank, an integrated inlet cover, and an integrated outlet cover. The gas storage tank is disposed between the first and second molecular sieve cylinders. The cylinder walls of the gas storage tank, the first molecular sieve cylinder, and the second molecular sieve cylinder are integrally formed. Oxygen separated from the first and second molecular sieve cylinders enters the gas storage tank. The integrated inlet cover is located at the upper port of the first, second, and gas storage tanks, and the integrated outlet cover is located at the lower port of the first, second, and gas storage tanks.

[0011] In one embodiment, the air inlet integrated cover is disposed at the upper end of the adsorption tower; the air inlet integrated cover is provided with a first air inlet end cover, a second air inlet end cover and an oxygen outlet end cover, wherein the first air inlet end cover corresponds to the first molecular sieve cylinder, the second air inlet end cover corresponds to the second molecular sieve cylinder, and the oxygen outlet end cover corresponds to the gas storage tank.

[0012] In one embodiment, the air intake integrated cover includes an integrally formed cover body and a valve seat. The valve seat is connected to the side of the cover body. The first air intake end cover, the second air intake end cover, and the oxygen outlet end cover are all disposed on the lower surface of the cover body. The lower surface of the valve seat is provided with a first air intake hole, a second air intake hole, and an exhaust hole. The front end face of the valve seat is provided with an oxygen outlet connector and a nitrogen outlet port. The first air inlet is connected to the first air inlet end cap, the second air inlet is connected to the second air inlet end cap, the oxygen outlet connector is connected to the oxygen outlet end cap, and the nitrogen outlet is connected to the exhaust port.

[0013] In one embodiment, the first air inlet is connected to the first air inlet end cap via a first air inlet channel, the second air inlet is connected to the second air inlet end cap via a second air inlet channel, the oxygen outlet connector is connected to the oxygen outlet end cap via an oxygen outlet channel, and the nitrogen outlet is connected to the exhaust port via a nitrogen outlet channel; wherein, the first air inlet channel, the second air inlet channel, the oxygen outlet channel, and the nitrogen outlet channel are all disposed within the air inlet integrated cover and do not exceed the height range of the cover body.

[0014] In one embodiment, the gas outlet integrated cover is sealed and assembled at the lower end of the adsorption tower; the gas outlet integrated cover is provided with a first oxygen outlet end cover, a second oxygen outlet end cover and an oxygen inlet end cover, wherein the first oxygen outlet end cover corresponds to the first molecular sieve cylinder, the second oxygen outlet end cover corresponds to the second molecular sieve cylinder, and the oxygen inlet end cover corresponds to the gas storage tank.

[0015] In one embodiment, the oxygen inlet end cap is provided with a first oxygen outlet and a second oxygen outlet, the first oxygen outlet is connected to the first oxygen outlet end cap, the second oxygen outlet is connected to the second oxygen outlet end cap, and a one-way valve is provided in both the first oxygen outlet and the second oxygen outlet.

[0016] In one embodiment, the oxygen inlet end cap is further provided with a continuous backflush air passage. The continuous backflush air passage includes a first backflush port and a second backflush port fixedly disposed in the oxygen inlet end cap. The continuous backflush air passage also includes a flexible connecting pipe sleeved on the first backflush port and the second backflush port. The first backflush port is connected to the first oxygen outlet end cap, and the second backflush port is connected to the second oxygen outlet end cap.

[0017] In one embodiment, at least one throttle valve is provided in the continuous backflush air path.

[0018] In one embodiment, a controllable backflush air passage is connected to the side of the integrated gas outlet cover. One end of the controllable backflush air passage is connected to the first oxygen outlet end cover, and the other end of the controllable backflush air passage is connected to the second oxygen outlet end cover. A backflush solenoid valve is also provided on the controllable backflush air passage, and the backflush solenoid valve is used to control the opening and closing of the controllable backflush air passage.

[0019] In one embodiment, the system further includes a reversing valve connected to the air intake integrated cover. The upper surface of the reversing valve is in sealing fit with the lower surface of the valve seat. The upper surface of the reversing valve has a nitrogen vent port, a left air port, and a right air port. The lower surface of the reversing valve is provided with an air inlet, and a solenoid valve assembly is provided inside the reversing valve. Wherein, the nitrogen vent of the gas valve is connected to the exhaust port, the left gas port of the gas valve is connected to the second air inlet, and the right gas port of the gas valve is connected to the first air inlet; In the first operating state, the solenoid valve assembly connects the air inlet to the left air port of the air valve, and simultaneously connects the nitrogen vent port of the air valve to the right air port of the air valve; in the second state, the solenoid valve connects the air inlet to the right air port of the air valve, and simultaneously connects the nitrogen vent port of the air valve to the left air port of the air valve.

[0020] Compared with the prior art, the integrated adsorption tower for oxygen generators provided in this application has at least the following beneficial effects: By integrating the molecular sieve cylinder and the gas storage tank together, and setting corresponding cavities on the inlet and outlet integrated covers, a sealed fit between the adsorption tower and the inlet and outlet integrated covers can be achieved, simplifying the overall structure and reducing the number of parts. By integrating the gas pipeline and valve body inside the inlet and outlet integrated covers, the assembly process eliminates the need for connecting pipelines, reducing assembly difficulty, improving production efficiency, and reducing the overall size, thus improving space utilization. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein: Figure 1 This is a schematic diagram of the structure of the integrated adsorption tower for an oxygen generator in one embodiment of the present invention; Figure 2 This is a schematic diagram of the integrated adsorption tower for an oxygen generator from another perspective in one embodiment of the present invention (its outlet integrated cover is shown). Figure 12 (Structure corresponding to the embodiment); Figure 3 This is an exploded view of an integrated adsorption tower for an oxygen generator in one embodiment of the present invention; Figure 4 This is a three-dimensional structural diagram of the air intake integrated cover in one embodiment of the present invention (bottom view). Figure 5 This is a schematic diagram of the air intake integrated cover in one embodiment of the present utility model (view from below, reinforcing ribs are hidden). Figure 6 This is a schematic diagram of the reversing valve in one embodiment of the present invention; Figure 7 This is a schematic diagram of the air path connection of the reversing valve in its first working state; Figure 8 This is a schematic diagram of the air circuit connection of the reversing valve in its second working state; Figure 9 This is a top view of the adsorption tower in one embodiment of the present invention; Figure 10 This is an exploded view of the air outlet integrated cover and related components in one embodiment of the present invention; Figure 11 This is a schematic diagram of the air outlet integrated cover in one embodiment of the present invention (top view, reinforcing ribs are hidden). Figure 12 This is a schematic diagram of the air outlet integrated cover in another embodiment of the present invention.

[0022] in: 1. Inlet integrated cover; 11. First inlet end cover; 10. Second inlet end cover; 12. Cover body; 13. Valve seat; 14. Oxygen outlet end cover; 131. Second inlet channel; 132. First inlet channel; 133. Oxygen outlet connector; 134. Nitrogen vent port; 135. Second inlet port; 136. First inlet port; 137. Exhaust port; 138. Oxygen outlet channel; 139. Valve fixing post; 15. Valve sealing groove; 16. Reinforcing rib; 2. Sealing ring; 3. Valve sealing ring; 4. Reversing valve; 40. Valve body; 41. Valve pressure plate; 42. Air inlet; 43. Valve nitrogen vent port; 44. Valve left port; 45. Valve right port; 46. Solenoid valve assembly; 47. Fixed 5. Gas valve screw; 6. Adsorption tower; 60. First molecular sieve cylinder; 61. Second molecular sieve cylinder; 62. Gas storage tank; 63. Threaded pipe; 7. Gas outlet integrated cover; 71. One-way valve; 72. Throttling valve; 73. Flexible connecting pipe; 74. Reinforcing rib; 701. First oxygen outlet end cover; 702. Second oxygen outlet end cover; 703. Oxygen inlet end cover; 705. First gas outlet channel; 706. Second gas outlet channel; 707. First oxygen outlet; 708. Second oxygen outlet; 709. First backflush port; 710. Second backflush port; 711. First backflush channel; 712. Second backflush channel; 713. First backflush connector; 714. Second backflush connector; 8. Integrated cover screw. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0024] It should be noted that the terms "first" and "second" used in this article do not specifically refer to order or sequence, nor are they intended to limit this case. They are merely used to distinguish components or operations described using the same technical terms.

[0025] The terms "connection" or "positioning" as used in this article can refer to two or more components or devices making direct physical contact with each other, or making indirect physical contact with each other, or to two or more components or devices operating or moving with each other.

[0026] The terms “include,” “including,” and “have” used in this article are all open-ended, meaning they include but are not limited to.

[0027] The terms “front,” “back,” “up,” “down,” “left,” and “right” used in this article are directional terms. In this case, they are only used to describe the positional relationship between the structures and are not intended to limit the specific direction of the protection scheme or its actual implementation.

[0028] In this application, Figure 1 The terms "up" and "front" are used as references to describe the directional relationships between the various parts. Example

[0029] like Figures 1-3 As shown, this embodiment provides an integrated adsorption tower for an oxygen generator, mainly including an inlet integrated cover 1, a reversing valve 4, an adsorption tower 6, and an outlet integrated cover 7. The reversing valve 4 is used to switch the gas path, which includes an air inlet 42 located at the bottom of the reversing valve 4 and a nitrogen discharge port 134 located on the inlet integrated cover 1.

[0030] like Figure 9 As shown, the adsorption tower 6 consists of a first molecular sieve cylinder 60, a second molecular sieve cylinder 61, a gas storage tank 62, and a threaded tube 63. The first molecular sieve cylinder 60 and the second molecular sieve cylinder 61 are cylindrical structures for storing adsorbent material, and the gas storage tank 62 is located between the two molecular sieve cylinders for collecting oxygen-enriched gas.

[0031] The cross-sectional shape of the gas storage tank 62 is complementary to that of the first molecular sieve cylinder 60 and the second molecular sieve cylinder 61, thereby maximizing space utilization. Furthermore, the gas storage tank 62 shares a portion of the cylinder wall with the first molecular sieve cylinder 60 and the second molecular sieve cylinder 61, thus reducing structural redundancy. A threaded tube 63 is disposed on the side wall of the molecular sieve cylinder, and both ends of the threaded tube 63 are tapped with internal threads, which, together with screws, connect the inlet integrated cover 1 and the outlet integrated cover 7 to the adsorption tower 6.

[0032] This adsorption tower integrates the molecular sieve cylinder, gas storage tank, and threaded pipe, reducing the number of parts, simplifying the structure, lowering assembly difficulty, improving production efficiency, and increasing space utilization.

[0033] In this embodiment, each molecular sieve cylinder has four threaded tubes 63 on its outer wall. These four threaded tubes 63 are distributed around the molecular sieve cylinder at approximately the same angle to ensure the uniformity of force on the molecular sieve cylinder. The portion of the wall of the threaded tube 63 closest to the gas storage tank 62 is shared with the gas storage tank 63 to further simplify the structure.

[0034] Preferably, a vertical notch is formed on the side wall of the threaded tube 63, so that the threaded tube 63 has a certain amount of elastic deformation, avoiding cracking due to deformation during the screw connection process. Since the threaded tube 63, the first molecular sieve cylinder 60, the second molecular sieve cylinder 61 and the gas storage tank 62 are of an integral structure, the deformation amount is very small when the adsorption tower 6 is connected firmly to other components, ensuring the airtightness when the adsorption tower 6 is connected to other components.

[0035] As Figure 4 and Figure 5 shown, the intake air integrated cover 1 is composed of a cover body 12 and a valve seat 13 connected. The valve seat 13 is connected to the side surface of the cover body 12, and the overall cross-section is approximately in the shape of a Chinese character 'pin'. The lower surface of the valve seat 13 is used to connect to the reversing valve 4. By connecting the valve seat 13 to the side surface of the cover body 12, it is possible to avoid increasing the vertical dimension. In an oxygen generator, the vertical dimension of the adsorption tower has a greater impact on the dimension of the entire oxygen generator, while the lateral space is relatively abundant. Therefore, by connecting the valve seat 13 to the side surface of the cover body 12, the vertical dimension of the adsorption tower will not be increased, improving the compactness of the whole oxygen generator.

[0036] On the lower surface of the cover body 12, a first intake air end cover 11, a second intake air end cover 10 and an oxygen outlet end cover 14 are provided. Among them, the positions, shapes and sizes of the first intake air end cover 11, the second intake air end cover 10 and the oxygen outlet end cover 14 respectively match those of the first molecular sieve cylinder 60, the second molecular sieve cylinder 61 and the gas storage tank 62, so as to achieve a sealed connection after being assembled in place.

[0037] Correspondingly, threaded holes 16 are provided at corresponding positions on the cover body 12 to cooperate with the threaded tube 63 to realize the connection between the intake air integrated cover 1 and the adsorption tower 6.

[0038] As Figure 5 shown, in order to achieve the intake air of the two molecular sieve cylinders, first intake air channels 132 and second intake air channels 131 are respectively formed on the side walls of the first intake air end cover 11 and the second intake air end cover 10. The lower surface of the valve seat 13 is provided with a first intake air hole 136 and a second intake air hole 135, and the first intake air hole 136 and the second intake air hole 135 are respectively connected to the first intake air channel 132 and the second intake air channel 131.

[0039] In order to achieve the discharge of oxygen and nitrogen, an oxygen outlet joint 133 and a nitrogen discharge port 134 are arranged in parallel on the front end surface of the valve seat 13. An exhaust hole 137 is formed on the lower surface of the valve seat 13, and the exhaust hole 137 is connected to the nitrogen discharge port 134. An oxygen outlet channel 138 is formed on the side wall of the oxygen outlet end cover 14, and the oxygen outlet end cover 14 is connected to the oxygen outlet joint 133 through the oxygen outlet channel 138.

[0040] By placing the oxygen outlet connector 133 and the nitrogen vent port 134 together on the front end face of the valve seat 13, it is easier to connect the pipeline during assembly compared to placing them in different locations. The horizontally parallel arrangement of the oxygen outlet connector 133 and nitrogen vent port 134 also makes the subsequent pipeline layout neater. Furthermore, the horizontal arrangement of the oxygen outlet connector 133 and nitrogen vent port 134 does not increase the vertical dimension of the air intake integrated cover 1, saving vertical space.

[0041] Furthermore, the first air inlet channel 132, the second air inlet channel 131, and the oxygen outlet channel 138 are all located inside the air intake integrated cover 1, reducing volume while avoiding the risk of pressure leakage from external pipelines. The first air inlet channel 132, the second air inlet channel 131, and the oxygen outlet channel 138 are all connected to the side walls of the first air inlet end cover 11, the second air inlet end cover 10, and the oxygen outlet end cover 14, and all extend horizontally, ensuring that these channels do not increase the height of the air intake integrated cover 1. Compared to connecting to the top of the cavity, connecting the channels to the side walls of the cavity allows for a minimum possible height for the air intake integrated cover 1.

[0042] While reducing the overall height, it is also necessary to ensure the structural strength of the integrated air intake cover 1, especially the relatively weaker first air intake end cover 11, second air intake end cover 10, and oxygen outlet end cover 14. Therefore, in this embodiment, reinforcing ribs 16 are provided in the gaps of the integrated air intake cover 1, particularly inside the first air intake end cover 11, second air intake end cover 10, and oxygen outlet end cover 14. In particular, the reinforcing ribs 16 inside the first air intake end cover 11 and second air intake end cover 10 also need to take into account the gas flow paths of the first air intake channel 132 and the second air intake channel 131. Therefore, it can be done as follows: Figure 4 As shown, the reinforcing ribs 16 inside the first air intake end cap 11 and the second air intake end cap 10 are designed to include a channel along the gas flow direction to keep the air passage unobstructed. Radial reinforcing ribs can be provided outside this channel to achieve partial diversion and flow diversion effects.

[0043] See Figure 5 On the lower surface of the valve seat 13, a closed-loop valve sealing groove 15 is provided around the outer edge of the first air inlet 136, the second air inlet 135, and the exhaust port 137. A valve sealing ring 3 is provided corresponding to the valve sealing groove. In the assembled state, after the mounting surface of the reversing valve 4 mates with the mounting surface of the valve seat 13, the valve sealing ring 36 is embedded in the valve sealing groove 15 to achieve sealing and fixation, ensuring the airtightness between the reversing valve 4 and the valve seat 13.

[0044] By connecting the sealing grooves on the outer sides of the first air inlet 136, the second air inlet 135, and the exhaust port 137 into a closed loop, the risk of air leakage can be reduced. Furthermore, the valve sealing ring 36 can be designed as a single, interconnected ring instead of three separate rings, thereby reducing the number of parts and simplifying the assembly process.

[0045] See also Figure 5 As shown in Figure 6, a valve fixing post 139 is provided on the mounting surface of the valve seat 13, and a positioning groove 47 is provided on the mounting surface of the directional valve 4. In the assembled state, the valve seat 13 and the directional valve 4 are positioned by the cooperation of the valve fixing post 139 and the positioning groove 47.

[0046] like Figure 6 As shown, the reversing valve 4 has four ports: an air inlet 42, a nitrogen vent port 43, a left air port 44, and a right air port 45. These four ports correspond sequentially to the internal pressure port, return air port, working port A, and working port B of the reversing valve 4. The nitrogen vent port 43, left air port 44, and right air port 45 are located on the same mounting side of the reversing valve 4, i.e., the upper surface of the reversing valve 4 in the assembled state. The reversing valve 4 also includes a solenoid valve assembly 46 and a solenoid valve pressure plate 41. The solenoid valve assembly 46 is used to control the switching between the first and second operating states.

[0047] In the assembled state, the upper surface of the reversing valve 4 is aligned and sealed with the lower surface of the valve seat 13, with the nitrogen vent 43 of the gas valve aligned with the exhaust port 137, the left gas port 44 of the gas valve aligned with the second air inlet 135, and the right gas port 45 of the gas valve aligned with the first air inlet 135. By designing the reversing valve 4 to correspond to the structure of the air inlet integrated cover 1, pipeline switching can be achieved conveniently and quickly while reducing the size of the components.

[0048] Figure 7 and Figure 8 The air path connection relationship of the reversing valve 4 in the first and second working states is shown.

[0049] like Figure 7 As shown, in the first operating state, the air inlet 42 is connected to the left air port 44 of the air valve, and the right air port 45 of the air valve is connected to the nitrogen vent port 43 of the air valve. At this time, air enters through the air inlet 42, passes through the left air port 44 into the first air inlet 136, then enters the first air inlet end cover 11, and then enters the first molecular sieve cylinder 60. Nitrogen is discharged from the upper end of the second molecular sieve cylinder 61, and is discharged through the right air port 45 and the nitrogen vent port 43 of the air valve.

[0050] like Figure 8As shown, in the second operating state, air inlet 42 is connected to the right air port 45 of the air valve, and the left air port 44 of the air valve is connected to the nitrogen vent port 43 of the air valve. At this time, air enters through air inlet 42, passes through the right air port 45 of the air valve, enters the second air inlet 135, then enters the second air inlet end cover 10, and then enters the second molecular sieve cylinder 61. Nitrogen is discharged from the upper end of the first molecular sieve cylinder 60, passes through the left air port 44 of the air valve, and is discharged through the nitrogen vent port 43 of the air valve.

[0051] 7-inch integrated vent cover Figure 10 and Figure 11 As shown, the gas outlet integrated cover 7 has a first oxygen outlet end cover 701, a second oxygen outlet end cover 702, and an oxygen inlet end cover 703 on its cover body 70. The positions, shapes, and sizes of the first oxygen outlet end cover 701, the second oxygen outlet end cover 702, and the oxygen inlet end cover 703 are matched with the first molecular sieve cylinder 60, the second molecular sieve cylinder 61, and the gas storage tank 62, respectively, so that a sealed connection can be achieved after assembly.

[0052] The oxygen inlet cap 703 is provided with a first oxygen outlet 707, a second oxygen outlet 708, a first backflush port 709, and a second backflush port 710. The first oxygen outlet 707 is connected to the first oxygen outlet cap 701, and the second oxygen outlet 708 is connected to the second oxygen outlet cap 702. One-way valves 71 are respectively disposed in the first oxygen outlet 707 and the second oxygen outlet 708, thereby forming an oxygen outlet passage from the first oxygen outlet cap 701 and the second oxygen outlet cap 702 to the oxygen inlet cap 703.

[0053] The first backflush port 709 is connected to the first oxygen outlet cap 701, and the second backflush port 710 is connected to the second oxygen outlet cap 702. The first backflush port 709 and the second backflush port 710 are connected by a flexible connecting pipe 73, thereby forming a continuous backflush air path between the first oxygen outlet cap 701 and the second oxygen outlet cap 702. In this embodiment, the flexible connecting pipe 73 is a silicone tube.

[0054] The two ends of the flexible connecting pipe 73 are detachably connected to the first backflush port 709 and the second backflush port 710, respectively. The throttle valve 72 can be disposed at both ends of the flexible connecting pipe 73 or disposed in the throttle valve seat. There is at least one throttle valve 72. In this embodiment, there are two throttle valves 72, which are disposed at both ends of the flexible connecting pipe 73, respectively.

[0055] Because the throttle valve 72 needs to withstand cyclic pressure, it requires more frequent maintenance or replacement compared to other components. By installing a detachable flexible connecting pipe 73 in the continuous backflush line, the throttle valve can be easily removed for inspection or replacement.

[0056] The oxygen outlet passage and the continuous backflush passage can be completely independent of each other, or they can share some channels to simplify the structure. In this embodiment, the first oxygen outlet 707 and the first backflush port 709 are both connected to the first oxygen outlet end cap 701 through the first outlet passage 705, and the second oxygen outlet 708 and the second backflush port 710 are both connected to the second oxygen outlet end cap 702 through the second outlet passage 706.

[0057] Furthermore, to ensure that most of the gas flowing out of the outlet channel enters the oxygen outlet passage and a small portion enters the continuous backflush passage, the aperture ratio of the first oxygen outlet 707 and the second oxygen outlet 708 to the first backflush outlet 709 and the second backflush outlet 710 is designed to be approximately 2:1, thereby achieving automatic distribution of the gas flowing out of the outlet channel. In addition, the throttling valve installed in the continuous backflush passage further reduces the actual aperture of the backflush passage, ensuring that most of the oxygen generated in the adsorption tower flows into the oxygen outlet passage, with only a small portion flowing into the continuous backflush passage.

[0058] Based on this, since the diameters of the first oxygen outlet 707 and the second oxygen outlet 708 are relatively large, while the area of ​​the oxygen inlet end cap 703 is limited, if the first oxygen outlet 707 and the second oxygen outlet 708 are arranged side by side, they will be too close together, making processing difficult. Therefore, the preferred arrangement of the oxygen outlets and the throttle valve seat is as follows: Figure 11 As shown, the first oxygen outlet 707 and the first backflush outlet 709 are located on one side, and the second oxygen outlet 708 and the second backflush outlet 710 are located on the other side. The positions of the first oxygen outlet 707 and the second oxygen outlet 708 are staggered, so as to maximize and rationally utilize the space of the oxygen inlet end cap 703.

[0059] Since the vertical dimension of the air outlet integrated cover 7 also needs to be as small as possible, and the first oxygen outlet end cover 701, the second oxygen outlet end cover 702 and the oxygen inlet end cover 703 are all recessed grooves with thin bottoms, how to reduce the size while ensuring the structural strength of each cavity becomes an unavoidable problem.

[0060] In this embodiment, the first oxygen outlet end cap 701, the second oxygen outlet end cap 702, and the oxygen inlet end cap 703 are all provided with reinforcing ribs 74. These reinforcing ribs 74 extend upward from the bottom of the groove and are connected to the side wall of the groove, which can ensure the strength of the end cap portion.

[0061] Furthermore, the reinforcing ribs 74 inside the oxygen inlet end cap 703 can be directly connected to the side walls of the first oxygen outlet 707, the second oxygen outlet 708, the first backflush port 709, and the second backflush port 710, thereby integrating the side walls of the first oxygen outlet 707, the second oxygen outlet 708, the first backflush port 709, and the second backflush port 710 into the reinforcing structure to form a whole, ensuring the strength of the oxygen inlet end cap 703.

[0062] The reinforcing ribs inside the first oxygen outlet end cap 701 and the second oxygen outlet end cap 702 need to leave corresponding gas channels at the corresponding positions of the first gas outlet channel 705 and the second gas outlet channel 706, so that oxygen can flow into the first gas outlet channel 705 and the second gas outlet channel 706 along the gas channels.

[0063] Preferably, some of the reinforcing ribs can be as follows: Figure 5 As shown, the ribs are radially connected to the sidewall of the end cap to achieve a gas diversion effect. When oxygen in the molecular sieve tube flows rapidly downwards, part of the gas flow is guided to the sidewall of the end cap by the reinforcing ribs, thereby reducing the direct impact of the gas flow on the bottom of the end cap and the valve body in the pipeline.

[0064] See Figure 3 The assembly process of the integrated adsorption tower of this oxygen generator is as follows: Place the sealing ring 2 between the inlet integrated cover 1 and the adsorption tower 6, and fix the inlet integrated cover 1 to the upper end of the adsorption tower 6 with several integrated cover screws 8. Place the gas valve sealing ring 3 between the reversing valve 4 and the inlet integrated cover 1, and fix the reversing valve 4 to the inlet integrated cover 1 with gas valve screws 5. Place another sealing ring 2 between the inlet integrated cover 1 and the adsorption tower 6, and fix the outlet integrated cover 7 to the lower end of the adsorption tower 6 with integrated cover screws 8.

[0065] It can be seen that by optimizing the structure of the adsorption tower 6, the air inlet integrated cover 1, and the air outlet integrated cover 7, the number of parts of the integrated adsorption tower of this oxygen generator is much simpler than the existing structure. All the pipeline structure is integrated inside, and there is no need to connect the pipeline during the assembly process, making the assembly faster and more convenient.

[0066] The working process of the integrated adsorption tower of this oxygen generator is as follows: Air enters the reversing valve 4 through air inlet 42, and is controlled by the reversing valve 4 to alternately enter the two molecular sieve cylinders. When one valve is connected to air inlet 42, the other valve is connected to the nitrogen discharge port 43. Taking the first molecular sieve cylinder 60 as an example, the air inlet of the first molecular sieve cylinder 60 is connected to air inlet 42. High-pressure air enters the first molecular sieve cylinder 60, and the pressure inside the cylinder increases. This is the pressurization stage of the first molecular sieve cylinder 60. As the pressure increases, the adsorbent preferentially adsorbs nitrogen, and most of the oxygen is discharged through the first oxygen outlet 707 and enters the gas storage tank 62. A small portion of the oxygen flows into the second molecular sieve cylinder 61 through the backflush channel to backflush and clean the second molecular sieve cylinder 61.

[0067] When the adsorbent in the first molecular sieve cylinder 60 becomes saturated and the pressure at the air inlet 42 reaches the set switching pressure, the control panel sends a control signal, and the reversing valve 4 switches, connecting the first molecular sieve cylinder 60 to the nitrogen vent port 43 of the gas valve. Nitrogen gas is discharged from the nitrogen vent port 43 through the exhaust hole 137 on the air inlet integrated cover 1 to the nitrogen vent port 134. The high-pressure gas in the first molecular sieve cylinder 60 is discharged into the atmosphere, and the pressure drops sharply; this is the desorption stage of the first molecular sieve cylinder 60. At the same time, the second molecular sieve cylinder 61 connects to the air inlet 42 and enters the pressurization stage.

[0068] Continuous oxygen output is achieved by alternating pressure increases and decreases in the first molecular sieve cylinder 60 and the second molecular sieve cylinder 61. Example

[0069] like Figure 12 As shown, this embodiment provides a pressure-controlled integrated gas outlet cover based on the above embodiments. The integrated gas outlet cover also includes a first oxygen outlet end cover 701, a second oxygen outlet end cover 702, an oxygen inlet end cover 703, a cover body 704, a first gas outlet channel 705, a second gas outlet channel 706, a first oxygen outlet 707, a second oxygen outlet 708, a first backflush port 709, and a second backflush port 710.

[0070] The difference lies in that a first backflush channel 711 is formed on the side wall of the first oxygen outlet end cap 701, and the end of the first backflush channel 711 extends out of the first oxygen outlet end cap 701 to form a first backflush connector 713. A second backflush channel 712 is formed on the side wall of the second oxygen outlet end cap 702, and the end of the second backflush channel 712 extends out of the second oxygen outlet end cap 702 to form a second backflush connector 714. A two-position two-way solenoid valve (a two-position two-way solenoid valve is existing technology, so its related structural details will not be further illustrated or described here) connects the first backflush connector 713 and the second backflush connector 714; the backflush between the two molecular sieve cylinders can be opened or closed through the solenoid valve.

[0071] The continuous backflush air path formed by the first backflush port 709, the second backflush port 710, and the flexible connecting pipe 73 remains open throughout the oxygen production process, ensuring continuous backflushing. The controllable backflush air path controlled by the solenoid valve provided in this embodiment offers greater operability, allowing for active opening or closing as needed, and enabling pulse-type backflushing. Compared to continuous backflushing, pulse-type backflushing achieves a better cleaning effect.

[0072] It should be noted that the controllable backflush air path and the continuous backflush air path can be set simultaneously or separately. In another possible embodiment, the air outlet integrated cover 7 may not be provided with the first backflush port 709, the second backflush port 710 and the flexible connecting pipe 73, but only with the first backflush channel 711, the second backflush channel 712 and the solenoid valve.

[0073] The above description is merely an embodiment of this application. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of this application, but these improvements all fall within the protection scope of this application.

Claims

1. An integrated adsorption column for an oxygen generator, characterized by comprising: The device includes a first molecular sieve cylinder, a second molecular sieve cylinder, a gas storage tank, an inlet integrated cover, and an outlet integrated cover. The gas storage tank is located between the first molecular sieve cylinder and the second molecular sieve cylinder. The cylinder walls of the gas storage tank, the first molecular sieve cylinder, and the second molecular sieve cylinder are integrally formed. Oxygen separated from the first molecular sieve cylinder and oxygen separated from the second molecular sieve cylinder enter the gas storage tank. The inlet integrated cover is located at the upper port of the first molecular sieve cylinder, the second molecular sieve cylinder, and the gas storage tank, and the outlet integrated cover is located at the lower port of the first molecular sieve cylinder, the second molecular sieve cylinder, and the gas storage tank.

2. The integrated adsorption column for an oxygen generator according to claim 1, wherein The air inlet integrated cover is located at the upper end of the adsorption tower; the air inlet integrated cover is provided with a first air inlet end cover, a second air inlet end cover and an oxygen outlet end cover, wherein the first air inlet end cover corresponds to the first molecular sieve cylinder, the second air inlet end cover corresponds to the second molecular sieve cylinder, and the oxygen outlet end cover corresponds to the gas storage tank.

3. The integrated adsorption column of the oxygen generator according to claim 2, characterized in that, The air intake integrated cover includes an integrally formed cover body and a valve seat. The valve seat is connected to the side of the cover body. The first air intake end cover, the second air intake end cover, and the oxygen outlet end cover are all disposed on the lower surface of the cover body. The lower surface of the valve seat is provided with a first air intake hole, a second air intake hole, and an exhaust hole. The front end face of the valve seat is provided with an oxygen outlet connector and a nitrogen outlet port. The first air inlet is connected to the first air inlet end cap, the second air inlet is connected to the second air inlet end cap, the oxygen outlet connector is connected to the oxygen outlet end cap, and the nitrogen outlet is connected to the exhaust port.

4. The integrated adsorption column of claim 3, wherein, The first air inlet is connected to the first air inlet end cap through a first air inlet channel, the second air inlet is connected to the second air inlet end cap through a second air inlet channel, the oxygen outlet connector is connected to the oxygen outlet end cap through an oxygen outlet channel, and the nitrogen outlet is connected to the exhaust port through a nitrogen outlet channel; wherein, the first air inlet channel, the second air inlet channel, the oxygen outlet channel, and the nitrogen outlet channel are all disposed within the air inlet integrated cover and do not exceed the height range of the cover body.

5. The integrated adsorption column for an oxygen generator according to claim 1, wherein The gas outlet integrated cover is sealed and assembled at the lower end of the adsorption tower; the gas outlet integrated cover is provided with a first oxygen outlet end cover, a second oxygen outlet end cover and an oxygen inlet end cover, wherein the first oxygen outlet end cover corresponds to the first molecular sieve cylinder, the second oxygen outlet end cover corresponds to the second molecular sieve cylinder, and the oxygen inlet end cover corresponds to the gas storage tank.

6. The integrated adsorption column of claim 5, wherein, The oxygen inlet end cap is provided with a first oxygen outlet and a second oxygen outlet. The first oxygen outlet is connected to the first oxygen outlet end cap, and the second oxygen outlet is connected to the second oxygen outlet end cap. A one-way valve is provided in both the first oxygen outlet and the second oxygen outlet.

7. The integrated adsorption column of claim 6, wherein, The oxygen inlet end cap is also provided with a continuous backflush air passage. The continuous backflush air passage includes a first backflush port and a second backflush port fixedly disposed in the oxygen inlet end cap. The continuous backflush air passage also includes a flexible connecting pipe sleeved on the first backflush port and the second backflush port. The first backflush port is connected to the first oxygen outlet end cap, and the second backflush port is connected to the second oxygen outlet end cap.

8. The integrated adsorption column of claim 7, wherein, At least one throttle valve is installed in the continuous backflush air circuit.

9. The integrated adsorption column of claim 5 or 7, wherein, The side of the integrated gas outlet cover is connected to a controllable backflush air passage. One end of the controllable backflush air passage is connected to the first oxygen outlet end cover, and the other end of the controllable backflush air passage is connected to the second oxygen outlet end cover. A backflush solenoid valve is also provided on the controllable backflush air passage, which is used to control the opening and closing of the controllable backflush air passage.

10. The integrated adsorption column for an oxygen generator according to claim 3, wherein It also includes a reversing valve, which is connected to the air intake integrated cover. The upper surface of the reversing valve is sealed to the lower surface of the valve seat. The upper surface of the reversing valve has a nitrogen vent, a left air port, and a right air port. The lower surface of the reversing valve has an air inlet. A solenoid valve assembly is installed inside the reversing valve. Wherein, the nitrogen vent of the gas valve is connected to the exhaust port, the left gas port of the gas valve is connected to the second air inlet, and the right gas port of the gas valve is connected to the first air inlet; In the first operating state, the solenoid valve assembly connects the air inlet to the left air port of the air valve, and simultaneously connects the nitrogen vent port of the air valve to the right air port of the air valve; in the second operating state, the solenoid valve assembly connects the air inlet to the right air port of the air valve, and simultaneously connects the nitrogen vent port of the air valve to the left air port of the air valve.

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