A high-efficiency and energy-saving nitrogen generator

Abstract

This invention relates to the field of nitrogen generator technology, and in particular discloses a high-efficiency and energy-saving nitrogen generator, including a housing, an air compressor, a cooling device, a filtration system, and a valve control system. The air compressor, cooling device, and filtration system are connected sequentially via pipelines. The filtration system is connected to at least two sets of nitrogen filtration devices in parallel. The valve control system controls at least one of the two sets of nitrogen filtration devices to be connected to the filtration system. Each set of nitrogen filtration devices includes at least two automatic interface connectors and at least one nitrogen filter. The two automatic interface connectors are respectively connected to the inlet and outlet of the nitrogen filter. Compared with traditional technology, this technical solution ensures nitrogen production while avoiding equipment downtime and reducing the energy consumption of equipment operation.

Description

Technical Field

[0001] This invention relates to the field of nitrogen generator technology, and in particular to a high-efficiency and energy-saving nitrogen generator. Background Technology

[0002] Nitrogen, as an inert gas, is odorless, colorless, and chemically stable. Currently, the mainstream industrial nitrogen production technologies are mainly divided into three categories: cryogenic air separation, pressure swing adsorption (PSA), and membrane air separation. Cryogenic air separation, by compressing and liquefying air and then separating it by distillation based on the difference in boiling points of oxygen and nitrogen, can obtain high-purity (≥99.99%) nitrogen on a large scale. However, this technology involves large equipment size, high energy consumption, and long start-up time, making it only suitable for large-scale petrochemical and metallurgical applications with extremely high nitrogen demand and purity requirements. Pressure swing adsorption (PSA) nitrogen generators utilize the selective adsorption characteristics of carbon molecular sieves for oxygen and nitrogen molecules, achieving nitrogen purity up to 99.999%. However, in applications requiring low-purity nitrogen, this method has a relatively low cost-effectiveness in terms of energy consumption and operating costs. Not suitable for space-constrained and mobile operation scenarios; Membrane air separation nitrogen generator, as a new type of nitrogen generation equipment, uses a semi-permeable polymer hollow fiber membrane as the core separation element. It achieves nitrogen separation based on the difference in the permeation rate of different gas molecules in the membrane. "Fast gases" such as oxygen, carbon dioxide, and water vapor can quickly permeate through the membrane wall and be discharged, while nitrogen, as a "slow gas," is enriched and output from the outlet. It is especially suitable for small and medium-sized industrial scenarios, mobile gas supply scenarios, and space-constrained scenarios where nitrogen purity requirements are 90%-99.9%, such as tire inflation, mine fire prevention and extinguishing, and emergency rescue.

[0003] The mainstream hollow fiber membranes (collectively referred to as nitrogen membranes) used in existing membrane air separation nitrogen generators have limited pressure resistance, permeation efficiency, and service life in order to ensure their permeation performance. Under high-pressure conditions (such as oil and gas field flooding), membrane damage and permeation performance degradation are likely to occur. At the same time, the membrane modules are sensitive to oil, impurities, and humidity in compressed air, and are prone to aging and corrosion failure. Once damaged and ineffective, they need to be replaced immediately. However, nitrogen membrane damage often occurs during use, at which point the only option is to shut down the machine for maintenance. The disassembly and assembly process of nitrogen membranes on existing nitrogen generators is relatively complicated and time-consuming, affecting nitrogen production. Moreover, restarting the equipment after a shutdown greatly increases the operating energy consumption.

[0004] Therefore, it is necessary to propose a high-efficiency and energy-saving nitrogen generator that can ensure nitrogen production efficiency and quickly replace the nitrogen membrane without stopping the machine, thus saving the operating energy consumption of the equipment. Summary of the Invention

[0005] The purpose of this invention is to solve the problems of reduced nitrogen production and increased energy consumption during nitrogen membrane replacement in existing membrane air separation nitrogen generators. A high-efficiency, energy-saving nitrogen generator is provided.

[0006] The technical solution of this invention is: A high-efficiency and energy-saving nitrogen generator includes a housing, within which an air compressor, a cooling device, a filtration system, and a valve control system are provided. The air compressor, cooling device, and filtration system are connected in sequence via pipelines. The filtration system is connected to at least two sets of nitrogen filtration devices in parallel. The valve control system controls at least one of the two sets of nitrogen filtration devices to be connected to the filtration system. Each nitrogen filtration unit includes at least two automatic interface connectors and at least one nitrogen filter. The two automatic interface connectors are connected to the inlet and outlet of the nitrogen filter, respectively. Each nitrogen filter is equipped with a support plate and a first power unit. The nitrogen filter is detachably connected to the support plate, and the support plate is slidably connected to the housing. The first power unit drives the support plate to move relative to the housing, thereby driving the nitrogen filter to be fed into or removed from the housing.

[0007] Furthermore, the automatic interface docking device includes a first bracket and a flow guide slidably connected to the first bracket. The first bracket is fixedly connected to the housing. The air inlet end of the flow guide is connected to the filtration system through a hose. The air outlet end of the flow guide is provided with a female connector. The nitrogen filter includes a base and a nitrogen membrane fixed on the base. The base and the support plate are detachably connected. The nitrogen membrane has male connectors at both ends. The first support is equipped with a second power unit, which drives the flow guide to move relative to the nitrogen filter, thereby causing the female connector to engage or disengage with the male connector.

[0008] Furthermore, the automatic interface docking device also includes a second bracket fixedly connected to the first bracket. The second bracket is located between the first bracket and the guide, and a limit rod and a third power device are provided on the second bracket. The nitrogen filter also includes a sealed chamber fixed to both ends of the nitrogen membrane. The male connector is located inside the sealed chamber. Several pressure plates are slidably connected inside the sealed chamber. The pressure plates are arranged in a ring around the male connector. The edge of the sealed chamber is provided with a limiting groove that corresponds to the position and number of the pressure plates. The positions and numbers of the limiting rods and limiting grooves are all corresponding. The third power device drives the limiting rods into the corresponding limiting grooves, and then the limiting rods squeeze the pressure plate and move it towards the male connector.

[0009] Furthermore, the female connector is a frustum structure with a large diameter at one end and a small diameter at the other end. The larger diameter end of the female connector is sleeved with the male connector, and the other end of the female connector is connected to the air outlet of the guide.

[0010] Furthermore, the end of the pressure plate opposite to the male connector has an arc-shaped surface, the shape of which matches the frustum structure of the female connector. When the pressure plate moves closer to the male connector, the arc-shaped surface is spliced ​​to form a frustum-shaped groove that matches the frustum structure of the female connector.

[0011] Furthermore, the male connector has a sealing and limiting groove, and the female connector has a sealing and limiting ring that matches the sealing and limiting groove. When the female connector and the male connector are fitted together, the sealing and limiting ring is located in the sealing and limiting groove, thereby forming an axial limit.

[0012] Furthermore, the pressure plate is slidably connected to the sealing chamber via a limiting post. An elastic element is provided between the limiting post and the sealing chamber. The elastic element drives the pressure plate away from the male connector, thereby resetting the pressure plate.

[0013] Furthermore, a sealing cover plate is fixedly connected to the opening of the sealed chamber. The sealing cover plate has a through hole for the female connector to pass through and a limiting hole for the limiting rod to pass through.

[0014] Furthermore, the male connector is made of metal or a plastic material that is not easily deformed, while the female connector is made of rubber.

[0015] Furthermore, the first bracket and the support plate are detachably connected by screws.

[0016] The present invention provides a high-efficiency and energy-saving nitrogen generator, which has the following beneficial effects: The air compressor provides the air source, the cooling device cools the gas, and the filtration system contains multiple stages and types of filters to remove large particles and other impurities from the air. The gas is then passed into a nitrogen filtration unit for nitrogen production. Two nitrogen filtration units, controlled by a valve control system, can operate alternately or simultaneously. When the nitrogen filter in one unit malfunctions, the valve control system switches the flow to another working nitrogen filtration unit. This is achieved by activating the automatic interface connector and the primary power unit within the faulty nitrogen filter. The automatic interface connector automatically connects to the inlet and outlet ends of the nitrogen filter. The process involves disconnecting the filter, then the first power unit moves the support plate and the nitrogen filter on it out of the housing, allowing the entire nitrogen filter to be removed from the support plate. A new nitrogen filter is then installed on the support plate, and the first power unit moves the support plate back into the housing. The automatic interface connector aligns with the inlet and outlet of the new nitrogen filter. The entire nitrogen filter replacement process can be completed without stopping the machine. Compared to traditional technologies, this solution eliminates the need for separate nitrogen membrane replacement; instead, the entire nitrogen filter containing the nitrogen membrane is replaced. This facilitates disassembly and assembly without requiring machine shutdown, ensuring nitrogen production while preventing equipment downtime and reducing energy consumption. Attached Figure Description

[0017] Figure 1 This is a structural reference diagram of the present invention; Figure 2 This is a perspective view of the nitrogen filtration device of the present invention; Figure 3 This invention relates to a three-dimensional combination of an automatic interface connector and a nitrogen filter. Figure 1 ; Figure 4 This invention relates to a three-dimensional combination of an automatic interface connector and a nitrogen filter. Figure 2 ; Figure 5 This is a perspective view of the automatic interface connector of the present invention; Figure 6 This is a perspective view of the nitrogen filter of the present invention; Figure 7 For the present invention and Figure 3 Main view of the corresponding automatic docking device and nitrogen filter combination; Figure 8 Reference for the usage status of the nitrogen filtration device of the present invention Figure 1 ; Figure 9 Reference for the usage status of the nitrogen filtration device of the present invention Figure 2 ; Figure 10 This is the main view of the usage state of the present invention; Figure 11 The state side view is used for this invention; Figure 12 For the present invention Figure 7 Enlarged view of section B in the middle.

[0018] Reference numerals: 1. Housing; 2. Air compressor; 3. Cooling device; 4. Filtration system; 5. Automatic interface connector; 6. Nitrogen filter; 7. Support plate; 8. First power unit; 9. First bracket; 10. Flow guide; 11. Hose; 12. Female connector; 13. Base; 14. Nitrogen membrane; 15. Male connector; 16. Second power unit; 17. Second bracket; 18. Limiting rod; 19. Third power unit; 20. Sealed chamber; 21. Pressure plate; 22. Limiting groove; 23. Arc-shaped surface; 24. Sealing limiting groove; 25. Sealing limiting ring; 26. Elastic element; 27. Sealing cover plate; 28. Through hole; 29. ​​Limiting hole; 30. Flip cover; 31. Fixing screw; 32. Air tank. Detailed Implementation

[0019] To make the technical means, technical features, inventive purpose and technical effects of this invention easier to understand, the invention will be further described below with reference to specific illustrations.

[0020] Example 1: like Figure 1 and Figure 2As shown, this embodiment provides a high-efficiency and energy-saving nitrogen generator, including a housing 1. The housing 1 houses an air compressor 2, a cooling device 3, a filtration system 4, and a valve control system. The air compressor 2, cooling device 3, and filtration system 4 are connected sequentially via pipes. The filtration system 4 is connected to at least two sets of nitrogen filtration devices connected in parallel. The valve control system controls at least one of the two sets of nitrogen filtration devices to connect to the filtration system 4. Each set of nitrogen filtration devices includes at least two automatic interface connectors 5 and at least one nitrogen filter 6. The two automatic interface connectors 5 are respectively connected to the inlet and outlet ends of the nitrogen filter 6. Each nitrogen filter 6 is correspondingly equipped with a support plate 7 and a first power device 8, preferably an electric cylinder. The nitrogen filter 6 and the support plate 7... The support plate 7 and the housing 1 are detachably connected by screws and slide together via guide rails. The first power unit 8 drives the support plate 7 to move relative to the housing 1, thereby driving the nitrogen filter 6 to be fed into or removed from the housing 1. Specifically, the air compressor 2 is a commercially available air compressor. The cooling device 3 is a cooling machine, which can also be purchased commercially. The filtration system 4 specifically includes a particulate filter, an oil mist filter, a carbon bed filter, and a heater. This filtration system 4 is a relatively mature technology and will not be described in detail here. The valve control system is a solenoid valve, which controls the opening and closing of the valve through the control system and circuit. The nitrogen filtration device can be set with three, four, five, or even more groups. The specific number of nitrogen filtration devices can be determined according to the needs of nitrogen production operations.

[0021] Preferred, such as Figure 5 The automatic interface connector 5 includes a first bracket 9 and a flow guide 10 slidably connected to the first bracket 9. The first bracket 9 is fixedly connected to the housing 1 with screws. The air inlet end of the flow guide 10 is connected to the filter system 4 through a hose 11, and the air outlet end of the flow guide 10 is provided with a female connector 12, such as... Figure 6 The nitrogen filter 6 includes a base 13 and a nitrogen membrane 14 fixed to the base 13 by screws. The base 13 and the support plate 7 are detachably connected by fixing screws 31. The nitrogen membrane 14 has male connectors 15 at both ends. The first bracket 9 is provided with a second power device 16. The second power device 16 drives the guide 10 to move relative to the nitrogen filter 6, thereby causing the female connector 12 to engage or disengage from the male connector 15. The second power device 16 is an electric cylinder. The ends of the female connector 12 and the male connector 15 are both designed with rounded corners.

[0022] The flexible hose 11 can deform to allow the guide tube 10 to slide on the first support 9. Traditional pipes are mostly made of metal, which does not allow the guide tube 10 to move. The guide tube 10 can move closer to and further away from the nitrogen filter 6, thus providing a basis for the connection of the male connector 15 and the female connector 12. Driven by the second power unit 16, the male connector 15 and the female connector 12 can be automatically connected or disconnected.

[0023] Preferred, such as Figure 3 and Figure 4 The automatic interface docking device 5 also includes a second bracket 17 that is screwed or welded to the first bracket 9. The second bracket 17 is located between the first bracket 9 and the guide 10. The second bracket 17 is provided with a limiting rod 18 and a third power device 19. The nitrogen filter 6 also includes a sealing chamber 20 fixed to both ends of the nitrogen membrane 14. The sealing chamber 20 is screwed or welded to the second bracket 17. The male connector 15 is located inside the sealing chamber 20. Several pressure plates 21 are slidably connected inside the sealing chamber 20. The pressure plates 21 are arranged in a ring around the male connector 15. The edge of the sealing chamber 20 is provided with limiting grooves 22 that correspond to the position and number of the pressure plates 21. The position and number of the limiting rods 18 correspond to the limiting grooves 22. Preferably, there are three limiting rods 18 and three limiting grooves 22. The third power device 19 drives the filter. The limiting rod 18 enters the corresponding limiting groove 22, and then the limiting rod 18 presses the pressure plate 21 to move towards the male connector 15. The third power device 19 is preferably a cylinder or electric cylinder. Preferably, the cross-sectional shape of the limiting groove 22 is arc-shaped. One side of the end of the limiting rod 18 is an arc-shaped surface that matches the arc shape of the limiting groove 22, which increases the contact area, distributes the stress, and can limit the limiting rod 18 to prevent it from shaking in the sealed chamber 20. The other side is an inclined plane. The inclined plane can buffer and reduce friction when it contacts the pressure plate 21, so that the pressure plate 21 can move along the inclined plane as the limiting rod 18 is inserted, causing the pressure plate 21 to contract towards the center of the sealed chamber 20, thereby compressing the female connector 12 and facilitating the insertion of the limiting rod 18.

[0024] The presence of the limiting rod 18 can push the pressure plate 21 to squeeze the female connector 12 and the male connector 15. The limiting rod 18 extends and retracts inward to squeeze the female connector 12, thereby increasing the friction and sealing between the female connector 12 and the male connector 15 and improving the sealing effect.

[0025] Preferred, such as Figure 5 The female connector 12 is a frustum structure with a large diameter at one end and a small diameter at the other end. The large diameter end of the female connector 12 is sleeved with the male connector 15, and the other end of the female connector 12 is connected to the air outlet of the guide 10. This design allows the female connector 12 to tend to separate from the male connector 15 when the air pressure is too high. The more the female connector 12 moves outward, the larger the diameter of the female connector 12 that contacts the pressure plate 21 becomes. Therefore, the greater the squeezing force of the pressure plate 21, the more self-locking effect is produced, ensuring the sealing performance.

[0026] Preferred, such as Figure 7The end of the pressure plate 21 opposite to the male connector 15 is provided with an arc-shaped surface 23. The shape of the arc-shaped surface 23 matches the frustum structure of the female connector 12. When the pressure plate 21 moves closer to the male connector 15, the arc-shaped surface 23 splices to form a frustum-shaped groove that matches the frustum structure of the female connector 12. The arc-shaped surface 23 can increase the contact area between the pressure plate 21 and the outer surface of the female connector 12, thereby improving the fixing effect of the pressure plate 21 on the male connector 15 and ensuring the firmness of the connection between the male connector 15 and the female connector 12.

[0027] Preferred, such as Figure 6 The male connector 15 is provided with a sealing and limiting groove 24, such as Figure 9 The female connector 12 is provided with a sealing limiting ring 25 that matches the sealing limiting groove 24, such as Figure 8 When the female connector 12 and the male connector 15 are fitted together, the sealing limit ring 25 is located in the sealing limit groove 24, thereby forming an axial limit. The sealing limit groove 24 and the sealing limit ring 25 cooperate with each other to further improve the sealing effect, and at the same time, they can also play a limiting role to prevent the female connector 12 and the male connector 15 from separating. The sealing limit ring 25 is preferably made of rubber.

[0028] Preferred, such as Figure 12 The pressure plate 21 is slidably connected to the sealing chamber 20 via a limiting post. An elastic element 26 is provided between the limiting post and the sealing chamber 20. The elastic element 26 drives the pressure plate 21 away from the male connector 15, thereby resetting the pressure plate 21. The sealing chamber 20 is provided with a cavity to accommodate the elastic element 26. The limiting post passes through the cavity. The elastic element 26 is preferably a spring. One end of the limiting post is welded to the pressure plate 21.

[0029] Preferred, such as Figure 4 The opening of the sealed chamber 20 is screwed with a sealing cover plate 27. The sealing cover plate 27 has a through hole 28 for the female connector 12 to pass through and a limiting hole 29 for the limiting rod 18 to pass through. The sealing cover plate 27 serves to protect other components inside the sealed chamber 20.

[0030] Preferably, the male connector 15 is made of metal or plastic that is not easily deformed, and the female connector 12 is made of rubber.

[0031] Preferred, such as Figure 10 and Figure 11 The first bracket 9 and the support plate 7 are detachably connected by screws. A flip cover 30 is rotatably connected to the housing 1 at the position corresponding to the nitrogen filter 6. When replacing the nitrogen filter 6, the flip cover 30 can be flipped open, so that the nitrogen filter 6 can be removed from the housing 1. Preferably, a gas storage tank 32 is also fixed inside the housing 1 with screws for storing the nitrogen gas produced by filtration.

[0032] The first power unit 8, the second power unit 16, and the third power unit 19 are connected to a control system via circuits and signals. The control system consists of a PLC and a computer. The PLC is a general-purpose model and controls the displacement feed of the first power unit 8. Sensors are also provided to detect whether the nitrogen filter 6 has been reset and whether the female connector 12 has been successfully fitted onto the male connector 15. The sensors are connected to the control system via electrical signals. The sensors are preferably laser sensors, infrared sensors, or pressure contact sensors to detect whether the support plate 7 has been accurately reset. The sensors are connected to the control system. The sensor that detects the reset of the nitrogen filter 6 is installed inside the housing 1 and opposite to the support plate 7. The sensor that detects whether the female connector 12 and the male connector 15 are fitted together is installed inside the sealed chamber 20. Both types of sensors transmit signals to the control system wirelessly. When the sensors are connected to the control system via wires, the sealed chamber has a connector for communication with the sensors. When the nitrogen filter 6 is replaced, the wire connected to the control system is unplugged from the connector, and the control system disconnects from the sensor on the nitrogen filter 6. When a new nitrogen filter 6 is installed, the wire is plugged back into the connector, and the control system connects to the sensor of the new nitrogen filter 6.

[0033] It is important to note that, such as Figure 11 If the nitrogen filter 6 of this device needs to be replaced, the entire unit should be replaced, rather than just the nitrogen membrane 14. It is as if the nitrogen filter 6 is a whole unit. When the nitrogen membrane 14 fails, the entire nitrogen filter 6 can be replaced directly. This only requires removing the fixing screws 31 between the support plate 7 and the base 13 to complete the disassembly of the nitrogen filter 6. It is simple and quick, which greatly improves the replacement efficiency. Afterwards, the staff can take the disassembled faulty nitrogen filter 6 to the maintenance table for disassembly, thereby removing the damaged nitrogen membrane 14 and installing the new nitrogen membrane 14, which can then be used as a new nitrogen filter for backup.

[0034] Working principle: During normal operation, such as Figure 1-12 As shown, the nitrogen filter 6 and the automatic interface connector 5 are normally connected and closed. The air compressor 2 is used to provide the air source, the cooling device 3 is used to cool the gas, and the filtration system 4 contains multiple stages and types of filtration to remove large particles and other impurities from the air. Then, the gas is introduced into the nitrogen filtration device to generate nitrogen. Under the control of the valve control system, the two sets of nitrogen filtration devices can work alternately or simultaneously.

[0035] Taking two sets of nitrogen filtration devices as an example, when the nitrogen filter 6 in one of the nitrogen filtration devices malfunctions, the valve control system switches the passage to another working nitrogen filtration device, allowing that device to temporarily handle nitrogen production alone. The passage of the faulty nitrogen filter is then closed. First, the third power unit 19 drives the limit rod 18 to retract, moving it away from the sealed chamber 20. Then, the pressure plate 21 automatically resets under the action of the elastic element 26, releasing the locking of the female connector 12. Next, the second power unit 16 is activated, moving the guide 10 away from the nitrogen filter 6, separating the female connector 12 from the male connector 15. Then, the first power unit 8 is activated, causing the support plate 7 to slide and move out of the housing 1. Maintenance personnel use wrenches and other tools to remove the fixing screws 31 on the base 13, separating the base 13 from the support plate 7. A new nitrogen filter 6 is then installed, and the fixing screws 31 are used again to secure the base 13 of the new nitrogen filter 6 to the support plate 7. Finally, the first power unit 8 is activated. The power unit 8 retracts, and the support plate 7 returns to the housing 1. After the sensor detects that the support plate 7 has reset, the control system commands the second power unit 16 to move the guide 10 closer to the nitrogen filter 6 until the male connector 15 and the female connector 12 are properly engaged. At this point, the sensor sends a signal to the control system, and the second power unit 16 stops. Then, the third power unit 19 drives the limiting rod 18 to extend into the limiting groove 22. The limiting rod 18 drives the pressure plate 21 to move, and the pressure plate 21 presses the female connector 12 again to complete the fixation. The replacement of the nitrogen filter 6 in the nitrogen filtration device can be completed in a few minutes. Therefore, even if two nitrogen filtration devices are operating simultaneously due to power requirements, if the nitrogen filter 6 in one of the nitrogen filtration devices is damaged and the other nitrogen filtration device needs to take on the nitrogen production work alone, since the nitrogen filtration device only needs to take on the nitrogen production work alone for a few minutes, the lifespan of the nitrogen filtration device will not be greatly affected, making it highly practical.

[0036] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the invention. All equivalent changes and modifications made in accordance with the scope of the claims of this invention should fall within the technical scope of this invention.

Claims

1. A high-efficiency and energy-saving nitrogen generator, comprising a housing (1), wherein an air compressor (2), a cooling device (3), a filtration system (4), and a valve control system are disposed within the housing (1), the air compressor (2), the cooling device (3), and the filtration system (4) being connected sequentially via pipes, characterized in that: The filtration system (4) is connected to at least two sets of nitrogen filtration devices in parallel, and the valve control system controls at least one of the two sets of nitrogen filtration devices to be connected to the filtration system (4). Each nitrogen filtration unit includes at least two automatic interface connectors (5) and at least one nitrogen filter (6), with the two automatic interface connectors (5) connected to the inlet and outlet of the nitrogen filter (6) respectively. Each nitrogen filter (6) is equipped with a support plate (7) and a first power device (8). The nitrogen filter (6) is detachably connected to the support plate (7). The support plate (7) is slidably connected to the housing (1). The first power device (8) drives the support plate (7) to move relative to the housing (1), thereby driving the nitrogen filter (6) to be sent into or removed from the housing (1).

2. The high-efficiency energy-saving nitrogen generator according to claim 1, characterized in that: The interface automatic docking device (5) includes a first bracket (9) and a flow guide (10) slidably connected to the first bracket (9). The first bracket (9) is fixedly connected to the housing (1). The air inlet end of the flow guide (10) is connected to the filter system (4) through a hose (11). The air outlet end of the flow guide (10) is provided with a female connector (12). The nitrogen filter (6) includes a base (13) and a nitrogen membrane (14) fixed on the base (13). The base (13) is detachably connected to the support plate (7). The nitrogen membrane (14) has male connectors (15) at both ends. The first support (9) is equipped with a second power device (16), which drives the guide (10) to move relative to the nitrogen filter (6), thereby causing the female connector (12) to engage or disengage with the male connector (15).

3. The high-efficiency energy-saving nitrogen generator according to claim 2, characterized in that: The interface automatic docking device (5) also includes a second bracket (17) fixedly connected to the first bracket (9). The second bracket (17) is located between the first bracket (9) and the guide (10). The second bracket (17) is provided with a limit rod (18) and a third power device (19). The nitrogen filter (6) also includes a sealed chamber (20) fixed at both ends of the nitrogen membrane (14), a male connector (15) located inside the sealed chamber (20), and a number of pressure plates (21) slidably connected inside the sealed chamber (20). The pressure plates (21) are arranged in a ring around the male connector (15), and the edge of the sealed chamber (20) is provided with a limiting groove (22) that corresponds to the position and number of the pressure plates (21). The positions and numbers of the limiting rod (18) and the limiting groove (22) are all corresponding. The third power device (19) drives the limiting rod (18) into the corresponding limiting groove (22), and then the limiting rod (18) squeezes the pressure plate (21) to move towards the male connector (15).

4. The high-efficiency energy-saving nitrogen generator according to claim 3, characterized in that: The female connector (12) is a frustum structure with a large diameter at one end and a small diameter at the other end. The large diameter end of the female connector (12) is connected to the male connector (15), and the other end of the female connector (12) is connected to the outlet end of the guide (10).

5. The high-efficiency energy-saving nitrogen generator according to claim 4, characterized in that: The end of the pressure plate (21) opposite to the male connector (15) is provided with an arc-shaped surface (23). The shape of the arc-shaped surface (23) matches the frustum structure of the female connector (12). When the pressure plate (21) moves closer to the male connector (15), the arc-shaped surface (23) splices together to form a frustum-shaped groove that matches the frustum structure of the female connector (12).

6. The high-efficiency energy-saving nitrogen generator according to claim 2, characterized in that: The male connector (15) is provided with a sealing and limiting groove (24), and the female connector (12) is provided with a sealing and limiting ring (25) that matches the sealing and limiting groove (24). When the female connector (12) and the male connector (15) are fitted together, the sealing and limiting ring (25) is located in the sealing and limiting groove (24), thereby forming an axial limit.

7. The high-efficiency energy-saving nitrogen generator according to claim 3, characterized in that: The pressure plate (21) is slidably connected to the sealing chamber (20) through the limiting post. An elastic element (26) is provided between the limiting post and the sealing chamber (20). The elastic element (26) drives the pressure plate (21) away from the male connector (15) so that the pressure plate (21) is reset.

8. The high-efficiency energy-saving nitrogen generator according to claim 3, characterized in that: A sealing cover plate (27) is fixedly connected to the opening of the sealed chamber (20). The sealing cover plate (27) has a through hole (28) for the female connector (12) to pass through and a limiting hole (29) for the limiting rod (18) to pass through.

9. The high-efficiency energy-saving nitrogen generator according to claim 2, characterized in that: The male connector (15) is made of metal or plastic that is not easily deformed, and the female connector (12) is made of rubber.

10. The high-efficiency energy-saving nitrogen generator according to claim 1, characterized in that: The first bracket (9) and the support plate (7) are detachably connected by screws.

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