Vehicle-mounted oxygen generation system, method and vehicle

Abstract

The application provides a vehicle-mounted oxygen production system, method and vehicle, which comprises a vehicle-mounted oxygen production unit, an oxygen storage unit, a nitrogen storage unit, an oxygen supply pipeline and a replacement pipeline. The oxygen storage unit is in communication with the vehicle-mounted oxygen production unit, the nitrogen storage unit is in communication with the vehicle-mounted oxygen production unit, the first end of the oxygen supply pipeline is in communication with the oxygen storage unit, the second end of the oxygen supply pipeline extends into the interior of the passenger cabin of the vehicle, the first end of the replacement pipeline is in communication with the nitrogen storage unit, and the second end of the replacement pipeline is in communication with the oxygen pipeline, so as to spray nitrogen into the oxygen pipeline, the oxygen storage unit and the oxygen supply pipeline, or the second end of the replacement pipeline is in communication with the oxygen supply pipeline, so as to spray nitrogen into the oxygen supply pipeline. By connecting the oxygen pipeline or the oxygen supply pipeline through the replacement pipeline, the oxygen pipeline, the oxygen storage unit and the oxygen supply pipeline are changed from an oxygen-rich environment to a nitrogen-rich environment, which is beneficial to avoiding the oxidation and aging of the pipeline material due to long-term oxygen-rich state.

Description

Technical Field

[0001] This application relates to the field of vehicle-mounted oxygen generation technology, and more particularly to a vehicle-mounted oxygen generation system, method, and vehicle. Background Technology

[0002] With the development of the automotive industry and special vehicle technology, people have placed higher demands on the comfort and life support capabilities of vehicle interiors. To ensure the physiological health and safety of passengers, in-vehicle oxygen generation systems are typically installed. These systems actively separate high concentrations of oxygen from the outside air and deliver them to each passenger location within the vehicle via pipelines.

[0003] In related technologies, oxygen delivery pipelines are crucial gas transmission channels connecting the oxygen generator to the oxygen outlet at the end of the passenger compartment. To accommodate the complex body structure and interior layout of large passenger vehicles or special vehicles, oxygen delivery pipelines typically have a long span and are often made of highly flexible polymer materials such as thermoplastic polyurethane elastomers. However, currently, due to prolonged exposure to an oxygen-rich environment, these pipelines are prone to aging phenomena such as oxidative degradation, cross-linking, or chain breakage, resulting in a significantly shortened pipeline lifespan. Summary of the Invention

[0004] This application provides an on-board oxygen generation system, method, and vehicle to improve the service life of oxygen delivery pipelines.

[0005] Firstly, this application provides an on-board oxygen generation system, comprising: An on-board oxygen generator unit, wherein the on-board oxygen generator unit has an oxygen outlet and a nitrogen outlet; An oxygen storage unit is connected to the oxygen outlet of the vehicle-mounted oxygen generator via an oxygen pipeline. A nitrogen storage unit, which has an inlet and an outlet, wherein the inlet of the nitrogen storage unit is connected to the outlet of the on-board oxygen generator unit via a nitrogen pipeline; An oxygen delivery pipeline, wherein the first end of the oxygen delivery pipeline is connected to the oxygen storage unit, and the second end of the oxygen delivery pipeline extends into the interior of the vehicle passenger compartment; The replacement pipeline has a first end connected to the output port of the nitrogen storage unit and a second end connected to the oxygen pipeline to spray nitrogen into the oxygen pipeline, the oxygen storage unit and the oxygen delivery pipeline. Alternatively, the second end of the replacement pipeline is connected to the oxygen supply pipeline to inject nitrogen into the oxygen supply pipeline; A first control valve is installed on the replacement pipeline to control the opening and closing of the replacement pipeline.

[0006] Compared with related technologies, this vehicle-mounted oxygen generation system has at least the following beneficial effects: by connecting the oxygen pipeline or oxygen delivery pipeline through the replacement pipeline, the oxygen in the oxygen pipeline, oxygen storage unit and oxygen delivery pipeline is replaced with nitrogen, or the oxygen in the oxygen delivery pipeline is replaced with nitrogen, so that the oxygen pipeline, oxygen storage unit and oxygen delivery pipeline change from an oxygen-rich environment to a nitrogen-rich environment (so that the oxygen delivery pipeline changes from an oxygen-rich environment to a nitrogen-rich environment). Because nitrogen molecules are chemically stable, they tightly wrap around the inner wall of the pipeline, displacing active oxygen free radicals, which helps to avoid the oxidation aging problem of pipeline materials due to long-term oxygen-rich state. In addition, this solution does not require additional external nitrogen source or complex auxiliary equipment, reducing the overall cost and complexity of the system.

[0007] In a first possible implementation of the first aspect, the on-board oxygen generation system further includes a pressure reducing valve, a nitrogen exhaust muffler, a recovery pipeline, and a displacement branch; The second end of the displacement pipeline is connected to the oxygen pipeline near the oxygen outlet of the vehicle-mounted oxygen generator. The inlet end of the recovery pipeline is connected to the end of the oxygen pipeline near the oxygen storage unit. The outlet end of the recovery pipeline is connected to the nitrogen exhaust silencer so that nitrogen is injected into the oxygen pipeline through the displacement pipeline and the nitrogen flowing through the oxygen pipeline is output through the recovery pipeline and finally discharged through the nitrogen exhaust silencer. The pressure reducing valve is installed on the oxygen supply pipeline. The first end of the displacement branch is connected to the nitrogen storage unit, and the second end of the displacement branch is connected to the oxygen supply pipeline. Along the oxygen supply direction, the second end of the displacement branch is located downstream of the pressure reducing valve so that nitrogen can be injected into the oxygen supply pipeline through the displacement branch.

[0008] In a first possible implementation of the first aspect, a first control valve connects the replacement pipeline to the oxygen pipeline. A nitrogen storage unit inputs nitrogen through the replacement pipeline. After entering the oxygen pipeline, the nitrogen purges the oxygen within the pipeline. The purged oxygen then enters the recovery pipeline and is finally discharged through a nitrogen exhaust silencer, completing the oxygen replacement in the oxygen pipeline. The second end of the replacement branch is located downstream of the pressure reducing valve, which helps prevent the nitrogen from being depressurized by the pressure reducing valve, thus ensuring the purging pressure and allowing oxygen molecules on the pipe wall to be effectively purged out of the oxygen supply pipeline. Furthermore, the location of the second end of the replacement branch downstream of the pressure reducing valve helps prevent the nitrogen from being depressurized by the pressure reducing valve.

[0009] In a second possible implementation of the first aspect, the on-board oxygen generation system further includes an electronic pressure reducing valve and a nitrogen exhaust muffler; The electronic pressure reducing valve is installed on the oxygen delivery pipeline; The nitrogen storage unit is connected to the nitrogen exhaust silencer via the first control valve; The second end of the replacement pipeline is connected to the oxygen pipeline at a position close to the oxygen outlet of the vehicle-mounted oxygen generating unit, so as to spray nitrogen gas into the oxygen pipeline, oxygen storage unit and oxygen delivery pipeline through the replacement pipeline.

[0010] In the second possible implementation of the first aspect, when the replacement pipeline purges the oxygen pipeline, oxygen storage unit, and oxygen delivery pipeline, the system can control the electronic pressure reducing valve to its maximum opening. At this time, the internal resistance of the electronic pressure reducing valve is reduced to its minimum, and the oxygen pipeline, oxygen storage unit, and oxygen delivery pipeline are purged sequentially, achieving integrated downstream purging of the entire pipeline. This structure is simple and easy to install. During oxygen production, nitrogen can be discharged through the nitrogen venting silencer.

[0011] In a third possible implementation of the first aspect, the on-board oxygen generating unit includes a compressor, a second three-way valve, a third three-way valve, a first molecular tower and a second molecular tower, the first molecular tower and the second molecular tower being arranged in parallel, and both the first molecular tower and the second molecular tower having the oxygen outlet and the nitrogen outlet; The compressor outlet is connected to the first molecular tower via a first branch and to the second molecular tower via a second branch. The second three-way valve is located on the first branch, and the third three-way valve is located on the second branch. The nitrogen pipeline is connected to both the second three-way valve and the third three-way valve. The oxygen outlets of both the first molecular tower and the second molecular tower are connected to the oxygen pipeline.

[0012] In the third possible implementation of the first aspect, the first and second molecular towers alternately perform cyclical actions of "pressurized adsorption for oxygen production" and "depressurized desorption for nitrogen removal" in time phase. This parallel and coordinated mechanism not only ensures a continuous and stable output of oxygen to the crew cabin, but also generates nitrogen for the nitrogen storage unit, providing nitrogen for subsequent oxygen pipelines and oxygen delivery pipelines, thus realizing the recycling of resources within the system.

[0013] In the fourth possible implementation of the first aspect, the oxygen outlet of the first molecular tower is connected to the first oxygen branch, and a first one-way valve is provided on the first oxygen branch. The oxygen outlet of the second molecular tower is connected to the second oxygen branch, and a second one-way valve is installed on the second oxygen branch; The first oxygen branch and the second oxygen branch merge and are connected to the oxygen pipeline; The first oxygen branch and the second oxygen branch are also connected by a third oxygen branch. Along the direction of oxygen flow, the connection point between the third oxygen branch and the first oxygen branch is located upstream of the first one-way valve, and the connection point between the third oxygen branch and the second oxygen branch is located upstream of the second one-way valve. A second control valve is provided on the third oxygen branch to control the on / off state of the third oxygen branch.

[0014] In the fourth possible implementation of the first aspect, after the oxygen production of the first or second molecular tower is completed, another molecular tower inputs the gas inside into the oxygen-producing molecular tower through the third oxygen branch, so as to facilitate the discharge of nitrogen.

[0015] In a fifth possible implementation of the first aspect, the oxygen delivery pipeline includes multiple oxygen delivery branches connected in parallel, and each oxygen delivery branch is equipped with a flow valve, a sensor and a shut-off valve. The flow valve and the shut-off valve are connected in series on the oxygen supply branch, and the sensor is connected to the oxygen supply branch. The flow valve, the shut-off valve, and the sensor are connected by a signal.

[0016] In the fifth possible implementation of the first aspect, multiple oxygen supply branches are set up, and the system can adjust the oxygen supply flow of each branch according to different seats in the vehicle to achieve personalized on-demand oxygen supply.

[0017] Secondly, this application also provides an on-board oxygen generation method, applied to the aforementioned on-board oxygen generation system, the on-board oxygen generation method further comprising: Obtain the vehicle-mounted oxygen generator stop signal; Based on the vehicle oxygen generation stop signal, control the vehicle oxygen generation unit to stop generating oxygen; The first control valve is opened, so that the replacement pipeline is in a connected state, and the nitrogen in the nitrogen storage unit is transported to the oxygen supply pipeline and / or oxygen pipeline through the replacement pipeline to spray nitrogen into the oxygen supply pipeline and / or oxygen pipeline.

[0018] Compared with related technologies, this vehicle-mounted oxygen generation method has at least the following beneficial effects: it switches the nitrogen flow path that was originally discharged to the atmosphere to the oxygen delivery pipeline and / or oxygen pipeline, focuses the oxygen delivery pipeline and / or oxygen pipeline on oxygen injection, fills the oxygen delivery pipeline and / or oxygen pipeline with nitrogen, maintains a nitrogen-rich environment, and thus extends the service life of the oxygen delivery pipeline and / or oxygen pipeline.

[0019] In a first possible implementation of the second aspect, the on-board oxygen generation method further includes: Obtain the total capacity V of the oxygen supply pipeline and / or oxygen pipeline, the safety factor K, and the flow rate Q of the nitrogen outlet of the on-board oxygen generator unit; Based on the total capacity V, safety factor K, and flow rate Q, the time T required to inject nitrogen into the oxygen delivery pipeline and / or oxygen pipeline is calculated. The oxygen supply pipeline and / or oxygen pipeline are purged based on the time T required for nitrogen to be injected into the oxygen supply pipeline and / or oxygen pipeline.

[0020] In the first possible implementation of the second aspect, the injection time is obtained by calculation, which helps to ensure that the injection duration is sufficient to purge oxygen without excessive nitrogen entering the crew compartment.

[0021] In a second possible implementation of the second aspect, the on-board oxygen generation method further includes: Obtain the oxygen concentration in the oxygen delivery pipeline and / or oxygen pipeline; If the oxygen concentration in the oxygen delivery pipeline and / or oxygen pipeline is lower than the first preset threshold, nitrogen supply is stopped; if the oxygen concentration in the oxygen delivery pipeline and / or oxygen pipeline is higher than the first preset threshold, nitrogen supply continues until the oxygen concentration in the oxygen delivery pipeline and / or oxygen pipeline is lower than the first preset threshold.

[0022] In the second possible implementation of the second aspect, by detecting the oxygen concentration in the oxygen supply line and oxygen pipeline, the completion of nitrogen injection can be detected in real time, which helps to ensure that the injection time is sufficient to purge oxygen while preventing excessive nitrogen from entering the crew compartment.

[0023] Thirdly, this application also provides a vehicle, including the above-mentioned on-board oxygen generation system and a vehicle body, wherein the on-board oxygen generation system is installed on the vehicle body.

[0024] The beneficial effects of this application are as follows: The vehicle-mounted oxygen generation system, method, and vehicle proposed in this application connect oxygen pipelines or oxygen delivery pipelines through replacement pipelines, replacing the oxygen in the oxygen pipelines, oxygen storage units, and oxygen delivery pipelines with nitrogen, or replacing the oxygen in the oxygen delivery pipelines with nitrogen, so that the oxygen pipelines, oxygen storage units, and oxygen delivery pipelines change from an oxygen-rich environment to a nitrogen-rich environment (so that the oxygen delivery pipeline changes from an oxygen-rich environment to a nitrogen-rich environment). Since nitrogen molecules are chemically stable, they tightly wrap around the inner wall of the pipeline, displacing active oxygen free radicals, which helps to avoid the oxidation aging problem of pipeline materials due to long-term oxygen-rich conditions. Furthermore, this solution does not require additional external nitrogen sources or complex auxiliary equipment, reducing the overall cost and complexity of the system. Attached Figure Description

[0025] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0026] In the attached diagram: Figure 1 This is a schematic diagram of the structure of a first vehicle-mounted oxygen generation system provided in one embodiment of this application; Figure 2 This is a schematic diagram of the structure of a second vehicle-mounted oxygen generation system provided in one embodiment of this application; Figure 3 This is a schematic flowchart of an embodiment of the vehicle-mounted oxygen generation method provided in this application.

[0027] The attached figures are labeled as follows: 1. Onboard oxygen generator unit; 101. Compressor; 102. Second three-way valve; 103. Third three-way valve; 104. First molecular tower; 105. Second molecular tower; 106. First oxygen branch; 107. Second oxygen branch; 108. Third oxygen branch; 109. Atmospheric pipeline; 110. Filter; 111. Heat exchanger; 112. Water removal valve; 113. Three-way proportional valve; 2. Oxygen storage unit; 3. Nitrogen storage unit; 4. Oxygen delivery pipeline; 41. Oxygen delivery branch; 42. Flow valve; 43. Sensor; 44. Shut-off valve; 5. Replacement pipeline; 6. Oxygen pipeline; 7. Nitrogen pipeline; 8. First control valve; 91. Pressure reducing valve; 92. Electronic pressure reducing valve; 10. Nitrogen exhaust silencer; 11. Recovery pipeline; 12. Replacement branch; 13. First valve; 14. Second valve. Detailed Implementation

[0028] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. This application can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0029] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the shape, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0030] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the present application. However, it will be apparent to those skilled in the art that embodiments of the present application may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the present application.

[0031] With the development of vehicle engineering technology, in order to ensure the physiological health of drivers and passengers in hypoxic environments, on-board oxygen systems are typically installed pre-installed or aftermarket. These systems mainly rely on an onboard oxygen generator to separate oxygen from the outside air and deliver it to each passenger location within the vehicle via pipelines. To accommodate the complex body structure, interior contours, and seat folding mechanisms of large vehicles, the oxygen delivery pipelines are usually quite long and are generally made of flexible polymer materials with good flexibility and biocompatibility, such as thermoplastic polyurethane elastomer (TPU).

[0032] Oxidation protection of pipelines refers to the protection against the residual high concentrations of oxygen within long-distance, sealed oxygen pipelines after the oxygen generation system has ceased operation. From a polymer chemistry perspective, TPU molecular chains contain numerous urethane groups and ether / ester bonds. Under prolonged, continuous oxygen-rich environments, these chemical bonds are highly susceptible to oxidative degradation, cross-linking, or chain breakage due to attacks by oxygen free radicals. Measures must be taken to prevent aging phenomena such as oxidative degradation, cross-linking, or chain breakage of the pipeline's inner wall material due to prolonged contact with high concentrations of oxygen, which would significantly shorten the pipeline's lifespan.

[0033] Please see Figure 1 An embodiment of this application provides an on-board oxygen generation system, including an on-board oxygen generation unit 1, an oxygen storage unit 2, a nitrogen storage unit 3, an oxygen delivery pipeline 4, and a replacement pipeline 5. The on-board oxygen generation unit 1 has an oxygen outlet and a nitrogen outlet, and is used to separate the input compressed air into oxygen and nitrogen, and output them through the oxygen outlet and nitrogen outlet respectively. The oxygen storage unit 2 is connected to the oxygen outlet of the on-board oxygen generation unit 1 through an oxygen pipeline 6, and is used to buffer, stabilize and store the separated oxygen. The nitrogen storage unit 3 has an input port and an output port. The input port of the nitrogen storage unit 3 is connected to the nitrogen outlet of the on-board oxygen generation unit 1 through a nitrogen pipeline 7, and is used to collect the waste nitrogen generated during the oxygen generation process.

[0034] The first end of the oxygen supply line 4 is connected to the oxygen storage unit 2, and the second end of the oxygen supply line 4 is connected to the oxygen supply equipment. The oxygen supply is used to supply oxygen to the interior of the vehicle passenger compartment to ensure the oxygen supply in the vehicle in an oxygen-deficient environment.

[0035] In one embodiment of this application, the first end of the replacement pipeline 5 is connected to the output port of the nitrogen storage unit 3, and the second end of the replacement pipeline 5 is connected to the oxygen pipeline 6. A first control valve 8 is provided on the replacement pipeline 5 to control the opening and closing of the replacement pipeline 5. When oxygen production to supply oxygen to the vehicle is stopped, nitrogen is introduced into the oxygen pipeline 6 and then sequentially into the oxygen storage unit 2 and the oxygen delivery pipeline 4. This sprays nitrogen into the oxygen pipeline 6, oxygen storage unit 2, and oxygen delivery pipeline 4, replacing the oxygen in these pipelines with nitrogen. This changes the oxygen pipeline 6, oxygen storage unit 2, and oxygen delivery pipeline 4 from an oxygen-rich environment to a nitrogen-rich environment. Because nitrogen molecules are chemically stable, they tightly coat the inner wall of the pipeline, displacing active oxygen free radicals, which helps to avoid the oxidation and aging of the pipeline materials due to long-term exposure to an oxygen-rich state. Furthermore, this solution does not require an additional external nitrogen source or complex auxiliary equipment, reducing the overall system cost and complexity.

[0036] In one embodiment of this application, the first end of the replacement pipeline 5 is connected to the output port of the nitrogen storage unit 3, and the second end of the replacement pipeline 5 is connected to the oxygen supply pipeline 4. A first control valve 8 is provided on the replacement pipeline 5 to control the opening and closing of the replacement pipeline 5. By inputting nitrogen into the oxygen supply pipeline 4, nitrogen is sprayed into the oxygen supply pipeline 4, and the oxygen in the oxygen supply pipeline 4 is replaced by nitrogen. The oxygen supply pipeline 4 changes from an oxygen-rich environment to a nitrogen-rich environment, which helps to avoid the oxidation and aging problem of pipeline materials due to long-term oxygen-rich state.

[0037] Please see Figure 1 In one embodiment of this application, the on-board oxygen generation system further includes a pressure reducing valve 91, a nitrogen exhaust silencer 10, a recovery pipeline 11, and a replacement branch 12. The first control valve 8 is a three-way valve. The replacement pipeline 5 is also connected to the nitrogen exhaust silencer 10 through the first control valve 8. The first control valve 8 controls the replacement pipeline 5 to output to the nitrogen exhaust silencer 10 or to the oxygen delivery pipeline 4 and / or the oxygen pipeline 6. Electronic valves are provided at both the inlet and outlet ends of the oxygen storage unit 2 to control the opening and closing of the oxygen storage unit 2.

[0038] A pressure reducing valve 91 is installed on the oxygen supply line 4 to reduce the oxygen pressure during oxygen supply, bringing it down to a safe range suitable for human respiration. The second end of the replacement line 5 is connected to the oxygen line 6 near the oxygen outlet of the vehicle-mounted oxygen generator 1. The inlet end of the recovery line 11 is connected to the end of the oxygen line 6 near the oxygen storage unit 2, and a first valve 13 is installed at the inlet end of the recovery line 11 to control the opening and closing of the recovery line 11. After the on-board oxygen generating unit 1 stops generating oxygen, the electronic valves at the inlet and outlet ends of the oxygen storage unit 2 are closed. The outlet end of the recovery pipeline 11 is connected to the nitrogen exhaust silencer 10 so that nitrogen can be injected into the oxygen pipeline 6 through the replacement pipeline 5. The first control valve 8 controls the connection between the replacement pipeline 5 and the oxygen pipeline 6. The nitrogen storage unit 3 inputs nitrogen through the replacement pipeline 5. After the nitrogen enters the oxygen pipeline 6, it blows the oxygen in the oxygen pipeline 6. After the oxygen is blown out, it enters the recovery pipeline 11 and is finally discharged through the nitrogen exhaust silencer 10, thus completing the replacement of oxygen in the oxygen pipeline 6.

[0039] A second valve 14 is installed on the replacement branch 12. The second valve 14 is used to control the opening and closing of the replacement branch 12. The first end of the replacement branch 12 is connected to the nitrogen storage unit 3, and the second end of the replacement branch 12 is connected to the oxygen supply pipeline 4. Along the oxygen delivery direction, the connection point between the second end of the replacement branch 12 and the oxygen supply pipeline 4 is located downstream of the pressure reducing valve 91, so as to inject nitrogen into the oxygen supply pipeline 4. The replacement branch 12 injects oxygen into the oxygen supply pipeline 4, and oxygen is ejected from the oxygen supply pipeline 4 and discharged through the oxygen supply equipment, thus completing the replacement of oxygen in the oxygen supply pipeline 4. Furthermore, the second end of the replacement branch 12 is located downstream of the pressure reducing valve 91, which helps to prevent the nitrogen from being depressurized by the pressure reducing valve 91, thereby helping to ensure the injection pressure and allowing oxygen molecules on the pipe wall to be effectively ejected from the oxygen supply pipeline 4.

[0040] Please see Figure 2 In one embodiment of this application, the vehicle-mounted oxygen generation system further includes an electronic pressure reducing valve 92 and a nitrogen exhaust silencer 10; An electronic pressure reducing valve 92 is installed on the oxygen supply line 4. The second end of the replacement line 5 is connected to the oxygen line 6 near the oxygen outlet of the on-board oxygen generator 1 to purge nitrogen into the oxygen line 6, oxygen storage unit 2, and oxygen supply line 4. During normal oxygen supply, the electronic pressure reducing valve 92 is in operation, reducing the oxygen pressure. After oxygen supply stops, the electronic pressure reducing valve 92 is at its maximum opening, at which point the internal resistance of the electronic pressure reducing valve 92 is reduced to its minimum. At this time, the replacement line 5 is connected to the oxygen line 6, and nitrogen is purged into the oxygen line 6, oxygen storage unit 2, and oxygen supply line 4 in sequence, achieving integrated downstream purging of the entire pipeline. The structure is simple, easy to install, and can effectively purge nitrogen into the oxygen line 6, oxygen storage unit 2, and oxygen supply line 4.

[0041] In one embodiment of this application, the on-board oxygen generating unit 1 includes a compressor 101, a second three-way valve 102, a third three-way valve 103, a first molecular tower 104, and a second molecular tower 105. The first molecular tower 104 and the second molecular tower 105 are arranged in parallel. Both the first molecular tower 104 and the second molecular tower 105 have oxygen outlets and nitrogen outlets. The outlet of the compressor 101 is connected to the first molecular tower 104 through a first branch and to the second molecular tower 105 through a second branch. The first branch and the second branch are connected in parallel. The second three-way valve 102 is located in the first branch, and the nitrogen pipeline 7 is connected to the second three-way valve. Connection 102; A third three-way valve 103 is located in the second branch, and the nitrogen pipeline 7 is connected to the third three-way valve 103. The first molecular tower 104 is selectively connected to the compressor 101 and the nitrogen storage unit 3 through the second three-way valve 102. When the compressor 101 is connected to the first molecular tower 104, the first molecular tower 104 is disconnected from the nitrogen storage unit 3. The second molecular tower 105 is selectively connected to the compressor 101 and the nitrogen storage unit 3 through the third three-way valve 103. When the compressor 101 is connected to the second molecular tower 105, the second molecular tower 105 is disconnected from the nitrogen storage unit 3. The oxygen outlet of the first molecular tower 104 is connected to the oxygen pipeline 6, and the oxygen outlet of the second molecular tower 105 is connected to the oxygen pipeline 6.

[0042] Based on the principle of pressure swing adsorption (PSA), both the first molecular tower 104 and the second molecular tower 105 are filled with zeolite molecular sieves that selectively adsorb nitrogen. By controlling the second three-way valve 102 and the third three-way valve 103, one of the first molecular tower 104 and the second molecular tower 105 is active while the other is in standby mode. When compressed air is introduced into the first molecular tower 104, its internal pressure increases, and the molecular sieve adsorbs a large number of nitrogen molecules from the air. The unadsorbed oxygen flows out from the oxygen outlet and enters the oxygen pipeline 6. At the same time, the first molecular tower 104 is in a depressurization desorption state, and its internal pressure is released. The molecular sieve desorbs a large amount of previously adsorbed nitrogen, forming a high-concentration nitrogen-rich gas that is discharged from the nitrogen outlet. The first molecular tower 104 and the second molecular tower 105 alternately perform the cycle of "pressure adsorption for oxygen production" and "depressurization desorption for nitrogen removal" in time phase. This parallel and coordinated mechanism not only ensures a continuous and stable output of oxygen to the crew cabin, but also generates nitrogen for nitrogen storage unit 3, providing nitrogen for subsequent oxygen pipeline 6 and oxygen delivery pipeline 4, thus realizing the recycling of resources within the system.

[0043] In one embodiment of this application, the oxygen outlet of the first molecular tower 104 is connected to the first oxygen branch 106, and a first one-way valve is provided on the first oxygen branch 106. The oxygen outlet of the second molecular tower 105 is connected to the second oxygen branch 107, and a second one-way valve is provided on the second oxygen branch 107. This helps to prevent oxygen from flowing back to the first molecular tower 104 and the second molecular tower 105, and also helps to prevent nitrogen from being injected into the first molecular tower 104 and the second molecular tower 105 during nitrogen injection. After the first oxygen branch 106 and the second oxygen branch 107 merge, they connect to the oxygen pipeline 6. The first oxygen branch 106 and the second oxygen branch 107 are also connected by a third oxygen branch 108. Along the direction of oxygen flow, the connection point between the third oxygen branch 108 and the first oxygen branch 106 is located upstream of the first one-way valve, and the connection point between the third oxygen branch 108 and the second oxygen branch 107 is located upstream of the second one-way valve. A second control valve is installed on the third oxygen branch 108 to control the opening and closing of the third oxygen branch 108. The first molecular tower 104 and the second molecular tower 105 alternately perform "pressure adsorption oxygen production" and "depressurization desorption nitrogen removal" cycles in time phase. For example, after the first molecular tower 104 finishes producing oxygen, the gas in the second molecular tower 105 enters the first molecular tower 104 through the third oxygen branch 108, and the nitrogen in the first molecular tower 104 is discharged into the nitrogen pipeline 7, which facilitates the discharge of nitrogen.

[0044] In one embodiment of this application, the oxygen delivery pipeline 4 includes multiple oxygen delivery branches 41 connected in parallel. Each oxygen delivery branch 41 is equipped with a flow valve 42, a sensor 43, and a shut-off valve 44. The flow valve 42 is used to detect the oxygen flow rate within the oxygen delivery branch 41, the sensor 43 is used to detect the gas pressure and oxygen concentration within the oxygen delivery branch 41, and the shut-off valve 44 is used to control the opening and closing of the oxygen delivery branch 41. The flow valve 42, sensor 43, and shut-off valve 44 are connected by a signal connection. Based on the gas flow rate, gas pressure, and oxygen concentration obtained from the sensor 43 and flow valve 42, the opening and closing of the shut-off valve 44 is controlled. When oxygen needs to be supplied, the shut-off valve 44 is opened. When oxygen supply stops, nitrogen is injected into all oxygen delivery branches 41. After the injection is completed (the completion status is obtained through the sensor 43 and flow valve 42), the shut-off valve 44 is closed, maintaining a positive pressure nitrogen-rich state inside the pipeline. The system can adjust the oxygen flow rate of each branch according to different seats in the vehicle, so as to achieve personalized oxygen supply on demand.

[0045] In one embodiment of this application, the on-board oxygen generator 1 further includes an atmospheric duct 109, a filter 110, a heat exchanger 111, a dehydration valve 112, a three-way proportional valve 113, and a seat air source interface. Along the air intake direction, the filter 110, compressor 101, heat exchanger 111, and dehydration valve 112 are connected in series on the atmospheric duct 109. The seat air source interface is connected to the atmospheric duct 109 via the three-way proportional valve 113. The filter 110 performs preliminary filtration of the atmosphere, and the heat exchanger 111 rapidly lowers the air temperature to below the dew point. Supersaturated water vapor in the air condenses into liquid water droplets, which are then separated and discharged from the system as they flow through the dehydration valve 112. This pretreatment process not only provides dry raw material gas for the first molecular tower 104 and the second molecular tower 105, but also ensures that the nitrogen gas separated by the first molecular tower 104 and the second molecular tower 105 also has an extremely low dew point. When this dry, high-purity nitrogen is used for purging and replacement, it not only displaces oxygen but also carries away trace amounts of moisture remaining on the inner wall of the pipeline, reducing the probability of moisture and oxygen jointly damaging the pipeline and creating a dry, pure, nitrogen-rich protective environment for the pipeline.

[0046] Please see Figure 3 This application also provides an on-board oxygen generation method, applied to the aforementioned on-board oxygen generation system, the on-board oxygen generation method further comprising: Step 110: Obtain the vehicle oxygen generator stop signal; Step 120: Based on the vehicle oxygen production stop signal, control the vehicle oxygen production unit 1 to stop producing oxygen and deliver nitrogen to the oxygen supply line 4 and / or the oxygen supply line 6 to spray nitrogen into the oxygen supply line 6 and / or the oxygen supply line 4.

[0047] When the system detects a stop signal, this signal can be a user-initiated instruction to turn off the oxygen generator, or a stop command issued by the system after detecting that the oxygen concentration inside the vehicle has reached the occupants' respiratory health standards. The on-board oxygen generator 1 stops producing oxygen, and the first control valve 8 controls the replacement pipeline 5 to output nitrogen to the oxygen delivery pipeline 4 and / or the oxygen pipeline 6, thereby blocking the nitrogen emission path to the atmosphere. This switches the nitrogen flow path in the nitrogen storage unit 3 that was originally discharged to the atmosphere to the oxygen delivery pipeline 4 and / or the oxygen pipeline 6 through the replacement pipeline 5, and focuses the oxygen delivery pipeline 4 and / or the oxygen pipeline 6 on oxygen injection, so that the oxygen delivery pipeline 4 and / or the oxygen pipeline 6 are filled with nitrogen, maintaining a nitrogen-rich environment.

[0048] In one embodiment of this application, the on-board oxygen generation method further includes: Obtain the total capacity V of oxygen supply line 4 and / or oxygen line 6, the safety factor K, and the flow rate Q of the nitrogen outlet of the on-board oxygen generating unit 1, and calculate the time T required to inject nitrogen into oxygen supply line 4 and / or oxygen line 6. T = k × V / Q; The oxygen supply line 4 and / or oxygen line 6 are purged with nitrogen based on the time required for purging nitrogen into the oxygen supply line 4 and / or oxygen line 6.

[0049] If the purging time is set too short, oxygen at the end of the pipeline or at bends cannot be completely purged; if the purging time is set too long, too much nitrogen will be consumed from the nitrogen storage unit 3, and too much nitrogen will enter the crew compartment. Calculating the purging time helps ensure that the purging duration is sufficient to purge oxygen without allowing excessive nitrogen to enter the crew compartment.

[0050] In one embodiment of this application, the on-board oxygen generation method further includes: Obtain the oxygen concentration in oxygen supply line 4 and / or oxygen line 6; If the oxygen concentration in oxygen supply line 4 and / or oxygen supply line 6 is lower than a first preset threshold, nitrogen supply is stopped. If the oxygen concentration in oxygen supply line 4 and / or oxygen supply line 6 is higher than the first preset threshold, nitrogen supply continues until the oxygen concentration in oxygen supply line 4 and / or oxygen supply line 6 is lower than the first preset threshold. By detecting the oxygen concentration in oxygen supply line 4 and oxygen supply line 6, the completion rate of nitrogen purging can be monitored in real time, which helps ensure that the purging time is sufficient to purge oxygen without excessive nitrogen entering the crew compartment.

[0051] This application also provides a vehicle, including the above-mentioned on-board oxygen generation system and a vehicle body, wherein the on-board oxygen generation system is installed on the vehicle body.

[0052] The above embodiments are merely illustrative of the principles and effects of this application and are not intended to limit this application. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this application. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this application should still be covered by the claims of this application.

Claims

1. A vehicle-mounted oxygen generation system, characterized in that, include: An on-board oxygen generator unit, wherein the on-board oxygen generator unit has an oxygen outlet and a nitrogen outlet; An oxygen storage unit is connected to the oxygen outlet of the vehicle-mounted oxygen generator via an oxygen pipeline. A nitrogen storage unit, which has an inlet and an outlet, wherein the inlet of the nitrogen storage unit is connected to the outlet of the on-board oxygen generator unit via a nitrogen pipeline; An oxygen delivery pipeline, wherein the first end of the oxygen delivery pipeline is connected to the oxygen storage unit, and the second end of the oxygen delivery pipeline extends into the interior of the vehicle passenger compartment; The replacement pipeline has a first end connected to the output port of the nitrogen storage unit and a second end connected to the oxygen pipeline to spray nitrogen into the oxygen pipeline, the oxygen storage unit and the oxygen delivery pipeline. Alternatively, the second end of the replacement pipeline is connected to the oxygen supply pipeline to inject nitrogen into the oxygen supply pipeline; A first control valve is installed on the replacement pipeline to control the opening and closing of the replacement pipeline.

2. The vehicle-mounted oxygen generation system according to claim 1, characterized in that: The vehicle-mounted oxygen generation system also includes a pressure reducing valve, a nitrogen exhaust silencer, a recovery pipeline, and a replacement branch; The second end of the displacement pipeline is connected to the oxygen pipeline near the oxygen outlet of the vehicle-mounted oxygen generator. The inlet end of the recovery pipeline is connected to the end of the oxygen pipeline near the oxygen storage unit. The outlet end of the recovery pipeline is connected to the nitrogen exhaust silencer so that nitrogen is injected into the oxygen pipeline through the displacement pipeline and the nitrogen flowing through the oxygen pipeline is output through the recovery pipeline and finally discharged through the nitrogen exhaust silencer. The pressure reducing valve is installed on the oxygen supply pipeline. The first end of the displacement branch is connected to the nitrogen storage unit, and the second end of the displacement branch is connected to the oxygen supply pipeline. Along the oxygen supply direction, the second end of the displacement branch is located downstream of the pressure reducing valve so that nitrogen can be injected into the oxygen supply pipeline through the displacement branch.

3. The vehicle-mounted oxygen generation system according to claim 1, characterized in that: The on-board oxygen generation system also includes an electronic pressure reducing valve and a nitrogen exhaust silencer; The electronic pressure reducing valve is installed on the oxygen delivery pipeline; The nitrogen storage unit is connected to the nitrogen exhaust silencer via the first control valve; The second end of the replacement pipeline is connected to the oxygen pipeline at a position close to the oxygen outlet of the vehicle-mounted oxygen generating unit, so as to spray nitrogen gas into the oxygen pipeline, oxygen storage unit and oxygen delivery pipeline through the replacement pipeline.

4. The vehicle-mounted oxygen generation system according to any one of claims 1-3, characterized in that: The vehicle-mounted oxygen generating unit includes a compressor, a second three-way valve, a third three-way valve, a first molecular tower, and a second molecular tower. The first molecular tower and the second molecular tower are arranged in parallel, and both the first molecular tower and the second molecular tower have the oxygen outlet and the nitrogen outlet. The compressor outlet is connected to the first molecular tower via a first branch and to the second molecular tower via a second branch. The second three-way valve is located on the first branch, and the third three-way valve is located on the second branch. The nitrogen pipeline is connected to both the second three-way valve and the third three-way valve. The oxygen outlets of both the first molecular tower and the second molecular tower are connected to the oxygen pipeline.

5. The vehicle-mounted oxygen generation system according to claim 4, characterized in that: The oxygen outlet of the first molecular tower is connected to the first oxygen branch, and a first one-way valve is provided on the first oxygen branch. The oxygen outlet of the second molecular tower is connected to the second oxygen branch, and a second one-way valve is installed on the second oxygen branch; The first oxygen branch and the second oxygen branch merge and are connected to the oxygen pipeline; The first oxygen branch and the second oxygen branch are also connected by a third oxygen branch. Along the direction of oxygen flow, the connection point between the third oxygen branch and the first oxygen branch is located upstream of the first one-way valve, and the connection point between the third oxygen branch and the second oxygen branch is located upstream of the second one-way valve. A second control valve is provided on the third oxygen branch to control the on / off state of the third oxygen branch.

6. The vehicle-mounted oxygen generation system according to any one of claims 1-3, characterized in that: The oxygen delivery pipeline includes multiple oxygen delivery branches, which are connected in parallel, and each oxygen delivery branch is equipped with a flow valve, a sensor, and a shut-off valve. The flow valve and the shut-off valve are connected in series on the oxygen supply branch, and the sensor is connected to the oxygen supply branch. The flow valve, the shut-off valve, and the sensor are connected by a signal.

7. A method for generating oxygen on a vehicle, characterized in that, The vehicle-mounted oxygen generation system applied to any one of claims 1-6, the vehicle-mounted oxygen generation method further includes: Obtain the vehicle-mounted oxygen generator stop signal; Based on the vehicle oxygen generation stop signal, control the vehicle oxygen generation unit to stop generating oxygen; The first control valve is opened, so that the replacement pipeline is in a connected state, and the nitrogen in the nitrogen storage unit is transported to the oxygen supply pipeline and / or oxygen pipeline through the replacement pipeline to spray nitrogen into the oxygen supply pipeline and / or oxygen pipeline.

8. The on-board oxygen generation method according to claim 7, characterized in that, The on-board oxygen generation method also includes: Obtain the total capacity V of the oxygen supply pipeline and / or oxygen pipeline, the safety factor K, and the flow rate Q of the nitrogen outlet of the on-board oxygen generator unit; Based on the total capacity V, safety factor K, and flow rate Q, the time T required to inject nitrogen into the oxygen delivery pipeline and / or oxygen pipeline is calculated. The oxygen supply pipeline and / or oxygen pipeline are purged based on the time T required for nitrogen to be injected into the oxygen supply pipeline and / or oxygen pipeline.

9. The on-board oxygen generation method according to claim 7, characterized in that, The vehicle-mounted oxygen generation method also includes: Obtain the oxygen concentration in the oxygen delivery pipeline and / or oxygen pipeline; If the oxygen concentration in the oxygen delivery pipeline and / or oxygen pipeline is lower than the first preset threshold, nitrogen supply is stopped; if the oxygen concentration in the oxygen delivery pipeline and / or oxygen pipeline is higher than the first preset threshold, nitrogen supply continues until the oxygen concentration in the oxygen delivery pipeline and / or oxygen pipeline is lower than the first preset threshold.

10. A vehicle, characterized in that, The vehicle includes an on-board oxygen generation system as described in any one of claims 1 to 6 and a vehicle body, wherein the on-board oxygen generation system is installed on the vehicle body.

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