In-vehicle air path system and vehicle

Abstract

The application relates to the technical field of vehicle safety, in particular to an in-vehicle gas circuit system and a vehicle. The in-vehicle gas circuit system comprises a gas source device, an oxygen production assembly, a nitrogen storage tank and a nitrogen supply assembly. The oxygen production assembly comprises a first outlet and a second outlet, the first outlet is used for providing nitrogen, and the second outlet is used for providing oxygen. The nitrogen storage tank is in fluid communication with the first outlet. The nitrogen supply assembly comprises a nozzle, a nitrogen injection pipe and a safety control valve. The nitrogen injection pipe is in fluid communication with the nozzle and the nitrogen storage tank. The nozzle is arranged in a mounting space of the vehicle for mounting a power battery. The safety control valve is arranged in the nitrogen injection pipe and is used for controlling the on-off of the gas circuit between the nitrogen storage tank and the nozzle. The fire-retardant gas is directly sprayed around the power battery, and a low-oxygen environment is formed through the space where the power battery is mounted, so that the fire can be quickly extinguished. The power battery is extinguished in the initial stage of thermal runaway, the problem that the power battery is not extinguished in time is solved, the difficulty of extinguishing the fire is greatly reduced, and the success rate of extinguishing the fire is improved.

Description

Technical Field

[0001] This application relates to the field of vehicle safety technology, and in particular to an in-vehicle air circuit system and a vehicle. Background Technology

[0002] Currently, electric vehicles primarily use ternary lithium and lithium iron phosphate batteries. These two types of batteries are difficult to extinguish once burning, making firefighting challenging. Furthermore, ternary lithium batteries continue to release oxygen to support combustion during thermal runaway, rendering conventional fire extinguishers ineffective and further increasing the difficulty of fire suppression.

[0003] Moreover, once a power battery experiences thermal runaway, it burns rapidly, and the fire can quickly spread to a point where it becomes difficult to extinguish. It often takes a long time for the driver or those nearby to detect the fire and take extinguishing action, requiring specialized firefighting skills, resulting in delayed fire suppression of the power battery. Utility Model Content

[0004] The embodiments of this application aim to provide an in-vehicle air circuit system and a vehicle, so as to at least improve the problems of difficulty in extinguishing power battery fires and untimely fire extinguishing.

[0005] In order to solve the above-mentioned technical problems, the embodiments of this application adopt the following technical solutions: In a first aspect, embodiments of this application provide an in-vehicle air circuit system, the in-vehicle air circuit system including an air source device, an oxygen generation component, a nitrogen storage tank, and a nitrogen supply component; the air source device is used to provide airflow; the air source device is fluidly connected to the oxygen generation inlet of the oxygen generation component through a main air supply pipe; the oxygen generation component includes a first outlet and a second outlet, the first outlet being used to provide nitrogen, and the second outlet being used to provide oxygen; the nitrogen storage tank is fluidly connected to the first outlet; the nitrogen supply component includes a nozzle, a nitrogen injection pipe, and a safety control valve, the nitrogen injection pipe fluidly connecting the nozzle to the nitrogen storage tank, the nozzle being disposed within the installation space of the vehicle for installing a power battery, the safety control valve being disposed in the nitrogen injection pipe, the safety control valve being used to control the opening and closing of the air circuit between the nitrogen storage tank and the nozzle; the safety control valve is used to open in the event of thermal runaway of the power battery, so that the nozzle sprays nitrogen into the power battery.

[0006] In some embodiments, the main gas supply pipe is provided with a main control valve, which is used to control the opening and closing of the gas path between the gas source device and the oxygen generation component.

[0007] In some embodiments, the number of nozzles is multiple, and the multiple nozzles surround the power battery; at least one of the nozzles points towards the power battery.

[0008] In some embodiments, the nozzle is equipped with a temperature sensor for detecting the temperature of the mounting space of the power battery; the temperature sensor is also used to send an opening command to the safety control valve when the detected temperature exceeds a first threshold, so as to open the safety control valve.

[0009] In some embodiments, the safety control valve is a temperature control valve, which is located within the installation space of the power battery, and is used to open when its own temperature exceeds a first threshold.

[0010] In some embodiments, the in-vehicle air circuit system further includes an oxygen supply assembly, which includes an oxygen inhaler, an oxygen supply pipe, and a first control valve. The oxygen supply pipe connects the second outlet to the oxygen inhaler in fluid communication. The first control valve is located on the oxygen supply pipe and is used to control the opening and closing of the air circuit between the second outlet and the oxygen inhaler.

[0011] In some embodiments, the first control valve is an electronic valve, which is electrically connected to the vehicle's controller, which controls the first control valve to open and close alternately.

[0012] In some embodiments, the oxygen supply assembly further includes a second control valve disposed on the oxygen supply pipe, the second control valve being used to control the opening and closing of the air passage between the first control valve and the oxygen inhaler.

[0013] In some embodiments, the oxygen supply pipe includes a main oxygen supply pipe and a plurality of branch oxygen supply pipes, one end of the main oxygen supply pipe is in fluid communication with the outlet, and the other end of the main oxygen supply pipe is in fluid communication with one end of each of the plurality of branch oxygen supply pipes; the oxygen supply assembly includes a plurality of oxygen inhalers, and the other ends of each of the plurality of branch oxygen supply pipes are respectively in fluid communication with the plurality of oxygen inhalers; the first control valve is located on the main oxygen supply pipe, and the second control valve is located on the branch oxygen supply pipes.

[0014] Secondly, embodiments of this application provide a vehicle, the vehicle including the in-vehicle air circuit system as described in any embodiment of the first aspect.

[0015] The in-vehicle air system of this application embodiment uses nozzles to spray nitrogen gas into the installation space of the power battery, directly spraying the flame-retardant gas around the power battery and creating a low-oxygen environment through the power battery installation space to quickly extinguish the flames. The safety control valve opens in the event of thermal runaway of the power battery, enabling fire suppression in the early stages of thermal runaway, improving the problem of delayed fire suppression, greatly reducing the difficulty of fire suppression, and eliminating the need for manual operation, thus enhancing the safety of occupants.

[0016] The vehicle in this embodiment of the application is equipped with the above-mentioned in-vehicle air circuit system, which automatically extinguishes the fire in time with nitrogen after the power battery thermal runaway, improving the problem of the power battery fire not being extinguished in time, greatly reducing the difficulty of extinguishing the fire, and improving the success rate of extinguishing the fire.

[0017] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0018] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0019] Figure 1 This is a schematic diagram of the in-vehicle air circuit system according to an embodiment of this application; Figure 2 This is a schematic diagram of the vehicle structure according to an embodiment of this application; Figure 3 This is a schematic diagram showing the electrical connection between the controller and the safety control valve, the first control valve, and the temperature sensor in an embodiment of this application.

[0020] The reference numerals in the detailed embodiments are as follows: 100. Vehicle air system; 1. Gas source device; 11. Main gas supply pipe; 12. Main control valve; 2. Oxygen generating unit; 21. Oxygen inlet; 22. First outlet; 23. Second outlet; 3. Nitrogen storage tank; 4. Nitrogen supply assembly; 41. Nozzle; 42. Nitrogen injection pipe; 43. Safety control valve; 44. Temperature sensor; 5. Oxygen supply assembly; 51. Oxygen inhaler; 52. Oxygen supply pipe; 521. Main oxygen supply pipe; 522. Branch oxygen supply pipe; 53. First control valve; 54. Second control valve; 6. Oxygen storage tank; 200. Vehicle; 210. Installation space; 220. Power battery; 230. Controller. Detailed Implementation

[0021] To facilitate understanding of this application, the following description, in conjunction with the accompanying drawings and specific embodiments, will provide a more detailed account. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected to" another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0023] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0024] In the description of the embodiments of this application, the terms "first," "second," etc., are used to define components merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, these terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0025] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0026] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0027] Firstly, please refer to Figure 1 and Figure 2 This application provides an in-vehicle air supply system 100, which includes an air source device 1, an oxygen generating assembly 2, a nitrogen storage tank 3, and a nitrogen supply assembly 4. The air source device 1 provides airflow; the oxygen generating assembly 2 generates nitrogen and oxygen; the nitrogen storage tank 3 stores nitrogen; and the nitrogen supply assembly 4 sprays nitrogen to extinguish a fire in the vehicle 200. For example, please refer to... Figure 2 The vehicle 200 has a mounting space 210 housing a power battery 220. Nitrogen gas is sprayed onto the power battery 220 to extinguish any fires. Alternatively, nitrogen gas can be sprayed into the mounting space 210 to create a low-oxygen environment, enhancing the fire extinguishing effect on the power battery 220. The vehicle 200 can be a sedan, bus, coach, or truck, etc.

[0028] For the gas source device 1 mentioned above, please refer to Figure 1 The gas source device 1 is used to provide airflow, and may be, but is not limited to, an air pump, an air tank, or an air compressor. The gas source device 1 is in fluid communication with the oxygen generating assembly 2 through the main gas supply pipe 11 to provide gas to the oxygen generating assembly 2. Optionally, the main gas supply pipe 11 is a plastic pipe.

[0029] In some embodiments, the main air supply pipe 11 is equipped with a main control valve 12, which is used to control the opening and closing of the air passage between the air source device 1 and the oxygen generating assembly 2. The air source device 1 can use the air source of other equipment in the vehicle 200, such as the air source of the air conditioning equipment, the air source of the air suspension, or the air source of tire inflation, thus eliminating the need for additional compressors and other devices, reducing costs. However, the air source device 1 cannot start or stop synchronously with the working needs of the oxygen generating assembly 2. By setting the main control valve 12, the air supply from the air source device 1 to the oxygen generating assembly 2 can be cut off when the oxygen generating assembly 2 is not working, improving the problem of the oxygen generating assembly 2 running dry and extending the service life of the oxygen generating assembly 2. Optionally, the main control valve 12 is a solenoid valve.

[0030] For oxygen generating component 2 mentioned above, please refer to Figure 1 The oxygen generating assembly 2 includes an oxygen inlet 21, a first outlet 22, and a second outlet 23. The gas source device 1 is fluidly connected to the oxygen inlet 21 of the oxygen generating assembly 2 via a main gas supply pipe 11. The first outlet 22 provides nitrogen, and the second outlet 23 provides oxygen. Optionally, the oxygen generating assembly 2 includes a molecular sieve. After air is introduced into the oxygen inlet 21, nitrogen is adsorbed onto the molecular sieve, and the remaining air flows into the second outlet 23. It is understood that air has the highest nitrogen content; when the nitrogen in the air is removed, the oxygen concentration increases several times. Therefore, the gas supplied by the second outlet 23 is air with a higher oxygen concentration. The nitrogen adsorbed by the molecular sieve desorbs and flows into the first outlet 22 to provide nitrogen with higher purity.

[0031] For the nitrogen storage tank 3 mentioned above, please refer to Figure 1 The nitrogen storage tank 3 is in fluid communication with the first outlet 22, thereby receiving and storing nitrogen gas to provide sufficient nitrogen gas during fire extinguishing. The nitrogen storage tank 3 can be a metal tank, a plastic tank, etc., and can contain high-pressure gas to provide high-pressure nitrogen gas during fire extinguishing.

[0032] For the nitrogen supply component 4 mentioned above, please refer to Figure 1 The nitrogen supply assembly 4 includes a nozzle 41, a nitrogen injection pipe 42, and a safety control valve 43. The nitrogen injection pipe 42 connects the nozzle 41 to the nitrogen storage tank 3. The nozzle 41 is located within the installation space 210 of the vehicle 200. The safety control valve 43 is located within the nitrogen injection pipe 42 and is used to control the opening and closing of the gas path between the nitrogen storage tank 3 and the nozzle 41. For example, the safety control valve 43 is a solenoid valve. When the safety control valve 43 is open, high-pressure nitrogen gas from the nitrogen storage tank 3 flows into the installation space 210 to extinguish the fire in the power battery 220 and create a low-oxygen environment around the power battery 220, enhancing the fire extinguishing effect. Optionally, the nitrogen injection pipe 42 is a plastic pipe. Optionally, the nozzle 41 is a jet nozzle 41, used to spray a jet of gas to increase the flow rate of gas reaching the power battery 220 and the installation space 210, thereby enhancing the fire extinguishing effect.

[0033] The safety control valve 43 is configured to open in the event of thermal runaway of the power battery 220, so that the nozzle 41 sprays nitrogen gas into the power battery 220. In some embodiments, please refer to... Figure 3 The nozzle 41 is equipped with a temperature sensor 44, which is used to detect the temperature of the mounting space 210 of the power battery 220. The temperature sensor 44 is also used to send an opening command to the safety control valve 43 when the detected temperature exceeds a first threshold, so that the safety control valve 43 opens. For example, please refer to... Figure 2 and Figure 3 The vehicle 200 includes a controller 230, a safety control valve 43, and a temperature sensor 44, all electrically connected to the controller 230. The controller 230 continuously monitors the temperature within the installation space 210 via the temperature sensor 44. When the detected temperature exceeds a first threshold, for example, a first threshold of 100 degrees Celsius (i.e., the temperature is greater than 100 degrees Celsius), the controller 230 sends an opening command to the safety control valve 43 to open it. Alternatively, the temperature sensor 44 may send an opening command to the controller 230 when it detects a temperature exceeding the first threshold, and the controller 230 then forwards the command to the safety control valve 43. Alternatively, the temperature sensor 44 can be directly electrically connected to the safety control valve 43, meaning the temperature sensor 44 directly sends the opening command to the safety control valve 43, forming an independent control loop and improving reliability.

[0034] In other embodiments, the safety control valve 43 is a temperature control valve, located within the installation space 210 of the power battery 220. The safety control valve 43 is used to open when its own temperature exceeds a first threshold. For example, the safety control valve 43 may have a temperature control element, which can be a thermosensitive material, such as a wax column. When the temperature exceeds the first threshold and remains so for a certain period of time, such as several seconds, the wax column melts, and the safety control valve 43 opens. Alternatively, the temperature control element may be a thermosensitive metal. When the temperature exceeds the first threshold and remains so for a certain period of time, such as several seconds, the thermosensitive metal deforms to a certain degree and opens the safety control valve 43.

[0035] In some embodiments, please refer to Figure 2 Multiple nozzles 41 surround the power battery 220. The multiple nozzles 41 surrounding the power battery 220 increase the volume of nitrogen gas ejected per unit time, enhancing the fire extinguishing effect. At least one nozzle 41 is pointed directly at the power battery 220, and the nitrogen gas ejected through the nozzle 41 directly blows onto the battery, helping to dissipate flammable gases and reduce the temperature of the power battery 220, further enhancing the fire extinguishing effect. Multiple nozzles 41 can be controlled by the same safety control valve 43; or, please refer to [link to relevant documentation]. Figure 1 Multiple safety control valves 43 control multiple nozzles 41 respectively.

[0036] In some embodiments, please refer to Figure 1 The in-vehicle air supply system 100 also includes an oxygen supply assembly 5, which includes an oxygen inhaler 51, an oxygen supply pipe 52, and a first control valve 53. The oxygen supply pipe 52 fluidly connects the second outlet 23 to the oxygen inhaler 51. The first control valve 53 is located on the oxygen supply pipe 52 and is used to control the opening and closing of the air passage between the second outlet 23 and the oxygen inhaler 51. For example, the first control valve 53 is a solenoid valve. When the first control valve 53 is open, oxygen (high-oxygen concentration air) from the second outlet 23 flows into the oxygen inhaler 51 and can be introduced into the passenger space or directly into the mouth and nose of the occupants. Optionally, the oxygen supply pipe 52 is a plastic tube. Optionally, the oxygen inhaler 51 is an oxygen mask or an air outlet pipe. Optionally, the oxygen inhaler 51 includes an air outlet of the vehicle 200 and discharges oxygen through the air outlet.

[0037] In some embodiments, please refer to Figure 3The first control valve 53 is an electronic valve, electrically connected to the controller 230 of the vehicle 200. The controller 230 controls the alternating opening and closing of the first control valve 53. Pulsed oxygen supply is achieved through the alternating opening and closing of the first control valve 53, improving oxygen utilization. The controller 230 may include a human breathing state detection component to detect the breathing state of the driver and passengers. It controls the first control valve 53 to close when the person exhales and to open when the person inhales, thereby improving oxygen utilization without affecting the oxygen experience of the driver and passengers. Optionally, the human breathing state detection component is a human infrared sensor that determines the breathing state by detecting minute changes in the body surface caused by chest cavity movement during breathing.

[0038] In some embodiments, please refer to Figure 1 The oxygen supply assembly 5 also includes a second control valve 54, which is located in the oxygen supply pipe 52. The second control valve 54 is used to control the opening and closing of the air passage between the first control valve 53 and the oxygen inhaler 51. The second control valve 54 can be a manual control valve. When the driver or passenger does not need oxygen, the second control valve 54 can be manually closed to stop the oxygen supply from the oxygen inhaler 51. Optionally, the second control valve 54 can be a ball valve, butterfly valve, etc.

[0039] In some embodiments, please refer to Figure 1 The oxygen supply pipe 52 includes a main oxygen supply pipe 521 and multiple branch oxygen supply pipes 522. One end of the main oxygen supply pipe 521 is in fluid communication with an outlet, and the other end of the main oxygen supply pipe 521 is in fluid communication with one end of each of the multiple branch oxygen supply pipes 522. The oxygen supply assembly 5 includes multiple oxygen inhalers 51, and the other ends of the multiple branch oxygen supply pipes 522 are respectively in fluid communication with the multiple oxygen inhalers 51. A first control valve 53 is located on the main oxygen supply pipe 521, and a second control valve 54 is located on the branch oxygen supply pipes 522. The multiple oxygen inhalers 51 can correspond to multiple seats, that is, to multiple drivers and passengers, so that each driver and passenger can independently control the oxygen supply status of their corresponding oxygen inhaler 51 through the second control valve 54.

[0040] In some embodiments, please refer to Figure 1 The in-vehicle air supply system 100 also includes an oxygen storage tank 6, which is in fluid communication with the second outlet 23 to receive and store oxygen, providing sufficient oxygen when needed in the passenger space. The oxygen storage tank 6 can be made of metal, plastic, or other materials and can hold high-pressure gas to provide a sufficient amount of oxygen.

[0041] The in-vehicle air system 100 of this application embodiment uses nozzle 41 to spray nitrogen gas into the installation space 210 of the power battery 220, directly spraying the flame-retardant gas around the power battery 220 and creating a low-oxygen environment through the installation space of the power battery 220 to quickly extinguish the flame. The safety control valve 43 opens in the event of thermal runaway of the power battery 220, enabling fire suppression of the power battery 220 in the early stages of thermal runaway, improving the problem of delayed fire suppression and greatly reducing the difficulty of extinguishing the fire. No manual fire suppression by drivers or passengers is required, improving the success rate and safety of fire suppression. For lithium iron phosphate batteries that require external oxygen for combustion, the in-vehicle air system 100 of this application can create a low-oxygen environment using nitrogen, significantly enhancing the fire suppression effect of lithium iron phosphate batteries.

[0042] The in-vehicle air circuit system 100 of this application embodiment can not only provide oxygen in the vehicle to make the driving and riding space more comfortable, but also store high-pressure nitrogen for fire extinguishing in the event of spontaneous combustion of the power battery 220, improve the utilization rate of gas products of the in-vehicle air circuit system 100, and has a small space occupancy.

[0043] Secondly, please refer to Figure 2 This application provides a vehicle 200, which includes the aforementioned in-vehicle air system 100. The vehicle 200 is equipped with the aforementioned in-vehicle air system 100, which automatically extinguishes the fire promptly with nitrogen after the power battery 220 experiences thermal runaway, improving the problem of untimely fire extinguishing of the power battery 220, greatly reducing the difficulty of fire extinguishing, and increasing the success rate of fire extinguishing.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them; under the concept of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of this application as described above, which are not provided in detail for the sake of brevity; although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An in-vehicle air circuit system, characterized in that, include: A gas supply device is used to provide airflow; An oxygen generating assembly is provided, wherein the gas source device is in fluid communication with the oxygen inlet of the oxygen generating assembly via a main gas supply pipe; the oxygen generating assembly includes a first outlet and a second outlet, wherein the first outlet is used to provide nitrogen and the second outlet is used to provide oxygen. The nitrogen storage tank is in fluid communication with the first outlet; A nitrogen supply assembly includes a nozzle, a nitrogen injection pipe, and a safety control valve. The nitrogen injection pipe connects the nozzle to the nitrogen storage tank in fluid communication. The nozzle is located within the installation space of the vehicle for installing the power battery. The safety control valve is located on the nitrogen injection pipe and is used to control the opening and closing of the gas passage between the nitrogen storage tank and the nozzle. The safety control valve is used to open in the event of thermal runaway of the power battery, so that the nozzle sprays nitrogen gas into the power battery.

2. The in-vehicle air circuit system according to claim 1, characterized in that, The main gas supply pipe is equipped with a main control valve, which is used to control the opening and closing of the gas path between the gas source device and the oxygen generation component.

3. The in-vehicle air circuit system according to claim 1, characterized in that, The number of nozzles is multiple, and the multiple nozzles surround the power battery; At least one of the nozzles is directed at the power battery.

4. The in-vehicle air circuit system according to claim 1, characterized in that, The nozzle is equipped with a temperature sensor, which is used to detect the temperature of the installation space of the power battery; The temperature sensor is also used to send an opening command to the safety control valve when it detects that the temperature exceeds a first threshold, so as to open the safety control valve.

5. The in-vehicle air circuit system according to claim 1, characterized in that, The safety control valve is a temperature control valve, which is located in the installation space of the power battery. The safety control valve is used to open when its own temperature exceeds a first threshold.

6. The in-vehicle air circuit system according to any one of claims 1 to 5, characterized in that, The in-vehicle air circuit system also includes an oxygen supply component, which includes an oxygen inhaler, an oxygen supply pipe, and a first control valve. The oxygen supply pipe connects the second outlet to the oxygen inhaler in fluid communication. The first control valve is located on the oxygen supply pipe and is used to control the opening and closing of the air circuit between the second outlet and the oxygen inhaler.

7. The in-vehicle air circuit system according to claim 6, characterized in that, The first control valve is an electronic valve, which is electrically connected to the vehicle's controller. The controller is used to control the first control valve to open and close alternately.

8. The in-vehicle air circuit system according to claim 6, characterized in that, The oxygen supply assembly further includes a second control valve, which is located in the oxygen supply pipe and is used to control the opening and closing of the air passage between the first control valve and the oxygen inhaler.

9. The in-vehicle air circuit system according to claim 8, characterized in that, The oxygen supply pipe includes a main oxygen supply pipe and multiple branch oxygen supply pipes. One end of the main oxygen supply pipe is in fluid communication with the outlet, and the other end of the main oxygen supply pipe is in fluid communication with one end of each of the multiple branch oxygen supply pipes. The oxygen supply assembly includes a plurality of oxygen inhalers, and the other ends of the plurality of oxygen supply branch pipes are respectively fluidly connected to the plurality of oxygen inhalers; The first control valve is located on the main oxygen supply pipeline, and the second control valve is located on the branch oxygen supply pipeline.

10. A vehicle, characterized in that, Including the in-vehicle air circuit system as described in any one of claims 1 to 9.

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