Water intrusion prevention system and vehicle

Abstract

The utility model discloses a kind of anti-water system and vehicle, the anti-water system includes: air filter shell;Control valve, the control valve is arranged at the air outlet in the air filter shell;Water immersion identification device, the water immersion identification device is arranged at the lowest position in the air filter shell;Controller, respectively with the control valve and the water immersion identification device electric connection, the controller is configured as the signal of the water immersion identification device detected the air filter shell immersion controls the control valve closes the air outlet.It can guarantee that water immersion identification device detects the water immersion risk inside air filter shell in first time, to make control valve close in time, it can guarantee that water inside air filter shell can be effectively isolated in time, avoid the water in air filter shell into fuel cell system and damage.

Description

Technical Field

[0001] This utility model relates to the field of vehicle safety technology, and in particular to a water-proof system and vehicle. Background Technology

[0002] A fuel cell system comprises a hydrogen subsystem, an air subsystem, a thermal management subsystem, an electrical subsystem, and a control subsystem. Among these systems, the hydrogen, thermal management, electrical, and control subsystems are relatively independent and less susceptible to external interference. The air subsystem requires ambient air as fuel for the cathode reaction. Current applications typically add an air filter and an air intake duct at the front end of the air subsystem. The air intake duct draws in relatively clean air from a higher position and, through a special structure, filters liquid water from within the system, ensuring the air entering the fuel cell system is relatively dry. The air filter further filters particulate matter, sulfur-containing gases, hydrocarbon gases, ammonia, metallic substances, and other substances that pose a toxic risk to the fuel cell system, ensuring its normal and healthy operation.

[0003] In related technologies, there are no effective protection measures in existing vehicles for situations where external water enters the fuel cell system due to accidents such as intake manifold air-water separation failure or water bubbles. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a water ingress prevention system that can ensure that water inside the air filter housing can be effectively and promptly isolated, preventing water from entering the fuel cell system and causing damage.

[0005] This utility model further proposes a vehicle.

[0006] A water-proof system according to a first aspect of the present invention includes: an air filter housing; a control valve disposed at an air outlet within the air filter housing; a water immersion detection device disposed at the lowest position within the air filter housing; and a controller electrically connected to both the control valve and the water immersion detection device, the controller being configured to control the control valve to close the air outlet based on a signal detected by the water immersion detection device indicating water immersion in the air filter housing.

[0007] According to the water ingress prevention system of this utility model embodiment, by placing the water immersion detection device at the lowest position inside the air filter housing and placing the control valve at the air outlet inside the air filter housing, it is possible to ensure that the water immersion detection device detects the risk of water immersion inside the air filter housing at the first moment, and then controls the control valve to close in time. This ensures that the water inside the air filter housing is effectively and promptly isolated, preventing water from entering the fuel cell system and causing damage. In addition, this embodiment integrates both the control valve and the water immersion detection device inside the air filter housing, resulting in a compact structure that eliminates the need for additional installation components, thus facilitating installation and effectively reducing costs.

[0008] According to some embodiments of the present invention, the water immersion identification device includes: a housing having an open chamber; an electrode disposed in the chamber and electrically connected to the controller, the electrode including a positive electrode and a negative electrode; and a conductor movably disposed in the chamber for moving between a first position and a second position in the chamber; wherein, when water in the air filter housing flows into the chamber through the opening, the conductor moves from the first position to the second position to electrically connect the positive electrode and the negative electrode.

[0009] According to some embodiments of the present invention, the water immersion identification device further includes: a water immersion safety device, which is disposed at the lowest position in the chamber, and is disposed between the positive electrode and the negative electrode. The conductor is disposed on one side of the line connecting the positive electrode and the negative electrode, the water immersion safety device is used to separate the conductor from the positive electrode and the negative electrode, and the conductor can move from the first position to the second position after the water immersion safety device is immersed in water.

[0010] According to some embodiments of the present invention, the water immersion identification device further includes: an elastic element disposed in the chamber on the side of the conductor facing away from the water immersion safety, one end of the elastic element being connected to the chamber and the other end being connected to the conductor, the elastic element being used to provide an elastic force to move the conductor from the first position to the second position.

[0011] According to some embodiments of the present invention, the water immersion insurance is a honeycomb structure, which is placed with its unit open end face so that the honeycomb structure can be deformed in the longitudinal direction.

[0012] According to some embodiments of this utility model, the water immersion insurance is made of paper material.

[0013] According to some embodiments of the present invention, grooves are formed on opposite sides of the chamber, the positive electrode and the negative electrode are respectively disposed in the grooves, and the dimension h1 of the water immersion safety in the direction perpendicular to the line connecting the positive electrode and the negative electrode is greater than the dimension h2 of the groove in that direction.

[0014] According to some embodiments of the present invention, it further includes: an air intake pipe, one end of which is connected to the outside and the other end of which is connected to the air inlet of the air filter housing, and a rain cap and a vapor-water separator are provided inside the air intake pipe; a water filter sponge, which is disposed inside the air intake pipe at one end adjacent to the air inlet of the air filter housing; or the water filter sponge is disposed at the air inlet of the air filter housing.

[0015] According to some embodiments of the present invention, it further includes: an alarm device, which is electrically connected to the water immersion identification device and the controller respectively, and the alarm device is configured to issue an alarm signal based on the signal of water immersion of the air filter housing detected by the water immersion identification device, and the controller sends an alarm prompt to the cab.

[0016] A vehicle according to a second aspect of the present invention includes: a fuel cell system; the water ingress prevention system, wherein the air filter housing is connected to the fuel cell system.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a structural schematic diagram of the anti-water ingress system according to an embodiment of the present utility model;

[0020] Figure 2 This is a partial structural schematic diagram of the water-proof system according to an embodiment of the present utility model;

[0021] Figure 3 This is a diagram showing the normal state of the conductor of the water immersion identification device according to an embodiment of the present invention in the first position;

[0022] Figure 4 This is a diagram showing the immersion state of the conductor of the immersion identification device according to an embodiment of the present invention in the second position;

[0023] Figure 5 This is a top view schematic diagram of a water immersion insurance device according to an embodiment of the present utility model;

[0024] Figure 6 This is a schematic diagram of the logic control when the anti-water ingress system is turned on according to an embodiment of the present utility model;

[0025] Figure 7 This is a logic control diagram of the anti-water ingress system during normal operation according to an embodiment of the present utility model.

[0026] Figure label:

[0027] 100. Water ingress prevention system; 1. Air filter housing; 11. Air outlet; 12. Air inlet; 13. Dust outlet; 14. Air filter element; 2. Control valve; 3. Water immersion detection device; 31. Housing; 3101. Opening; 3102. Chamber; 3103. Groove; 32. Electrode; 3201. Positive electrode; 3202. Negative electrode; 33. Conductor; 34. Water immersion protection; 35. Elastic element; 4. Controller; 5. Air inlet pipe; 6. Water filter sponge; 200. Fuel cell system. Detailed Implementation

[0028] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention are described in detail below.

[0029] The following is for reference. Figures 1-7 A water-proof system according to an embodiment of the present invention is described.

[0030] like Figures 1-2 As shown, the water ingress prevention system 100 includes: an air filter housing 1, a control valve 2, a water immersion detection device 3, and a controller 4.

[0031] The control valve 2 is located at the air outlet 11 inside the air filter housing 1. This design ensures that water inside the air filter housing 1 is effectively and promptly isolated when the control valve 2 is closed, preventing water from entering the fuel cell system 200 and causing damage. Compared to placing the control valve 2 in other locations, this embodiment effectively prevents water that has entered the air filter from entering the fuel cell system 200, thus providing a water-proof function for the fuel cell system 200.

[0032] The water immersion detection device 3 is located at the lowest position inside the air filter housing 1, which can ensure that the water immersion inside the air filter housing 1 is detected as soon as possible after the air filter housing 1 is immersed in water, thereby triggering the protection mechanism of the fuel cell system 200.

[0033] Furthermore, both the control valve 2 and the water immersion detection device 3 are installed inside the air filter housing 1. This arrangement means that the air filter housing 1 not only contains the air filter element 14 to filter particulate matter, sulfur-containing gases, hydrocarbon gases, ammonia, and metallic substances that pose a toxic risk to the fuel cell system 200, but also includes the control valve 2 and the water immersion detection device 3. When water immerses the air filter housing 1, the water immersion detection device 3 identifies the immersion and transmits a water immersion signal, causing the control valve 2 to close the air outlet 11. This ensures that water inside the air filter housing 1 is effectively and promptly isolated, preventing water from entering the fuel cell system 200. In other words, this embodiment integrates the air filter element 14, control valve 2, and water immersion detection device 3 inside the air filter housing 1, resulting in a simple and compact structure that eliminates the need for additional installation components, facilitating installation and effectively reducing costs.

[0034] Furthermore, the controller 4 is electrically connected to the control valve 2 and the water immersion detection device 3 respectively. The controller 4 is configured to control the control valve 2 to close the air outlet 11 based on the signal detected by the water immersion detection device 3 indicating that the air filter housing 1 is immersed in water.

[0035] Specifically, after the water immersion detection device 3 detects water immersion inside the air filter housing 1, it will transmit the water immersion signal to the controller 4. The controller 4 receives the water immersion signal and controls the control valve 2 to close the air outlet 11 of the air filter housing 1, thereby preventing water inside the air filter housing 1 from entering the fuel cell system 200 and causing damage.

[0036] In some embodiments, the control valve 2 can be a normally closed one-way solenoid valve to ensure that air flows from the air filter housing 1 into the fuel cell in a unidirectional direction. In this embodiment, when the fuel cell system 200 is not powered on, the control valve 2 is in a normally closed state; when the fuel cell system 200 is operating normally, the control valve 2 is in an open state.

[0037] Specifically, such as Figure 6 As shown, when the fuel cell system 200 is not powered on, the control valve 2 is normally closed, preventing various substances from entering the fuel cell system 200. When the controller 4 receives the power-on signal from the fuel cell system 200, if the water immersion detection device 3 does not detect any water immersion risk inside the air filter housing 1, the fuel cell system 200 starts normally; otherwise, starting is not allowed. Figure 7As shown, when the fuel cell system 200 is operating normally, the control valve 2 is open, allowing air filtered by the air filter element 14 inside the air filter housing 1 to enter the fuel cell system 200 for reaction. If the water immersion detection device 3 detects a risk of water immersion inside the air filter housing 1, it sends a water immersion signal to the controller 4. The controller 4 executes a rapid shutdown procedure and immediately closes the control valve 2 after shutdown. At this time, the air outlet 11 of the air filter housing 1 is blocked, thus protecting the fuel cell system 200. The waterproof protection mechanism of this embodiment is safe and effective, ensuring that the fuel cell system 200 will not be damaged by water ingress into the air filter housing 1 during startup, operation, and shutdown.

[0038] Therefore, by placing the water immersion detection device 3 at the lowest position inside the air filter housing 1 and placing the control valve 2 at the air outlet 11 inside the air filter housing 1, the water immersion detection device 3 can detect the risk of water immersion inside the air filter housing 1 at the first moment, and then control the control valve 2 to close in time. This ensures that the water inside the air filter housing 1 can be effectively and promptly isolated, preventing water from entering the fuel cell system 200 and causing damage. In addition, this embodiment integrates both the control valve 2 and the water immersion detection device 3 inside the air filter housing 1, resulting in a compact structure that eliminates the need for additional installation components, facilitating installation and effectively reducing costs.

[0039] Furthermore, the water immersion identification device 3 includes: a housing 31, an electrode 32, and a conductor 33. The housing 31 has a chamber 3102 with an opening 3101, which ensures that water entering the air filter housing 1 enters the chamber 3102 through the opening 3101.

[0040] In this embodiment, the housing 31 is disposed at the bottom of the air filter housing 1 and protrudes relative to the bottom of the air filter housing 1, so that the opening 3101 of the housing 31 faces upward to correspond to the lowest position of the air filter housing 1, which can ensure that the water in the air filter housing 1 flows into the chamber 3102 at the first time.

[0041] Electrode 32 is disposed in chamber 3102 and electrically connected to controller 4. Electrode 32 includes a positive electrode 3201 and a negative electrode 3202. Conductor 33 is movably disposed in chamber 3102 and is used to move between a first position and a second position in chamber 3102. Specifically, when water in air filter housing 1 flows into chamber 3102 through opening 3101, conductor 33 moves from the first position to the second position to electrically connect the positive electrode 3201 and the negative electrode 3202.

[0042] The working process of the water immersion identification device 3 in this embodiment is briefly described as follows: Figure 3As shown, when the air filter housing 1 is not submerged in water, the conductor 33 is in the first position within the chamber 3102. At this time, the positive electrode 3201 and the negative electrode 3202 are electrically disconnected, thus preventing the transmission of signals to the controller 4. Figure 4 As shown, when water is immersed in the air filter housing 1, the water in the air filter housing 1 flows into the chamber 3102 through the opening 3101 of the chamber 3102, causing the conductor 33 to move from the first position to the second position, so that the two ends of the conductor 33 contact the positive electrode 3201 and the negative electrode 3202 respectively. At this time, the positive electrode 3201 and the negative electrode 3202 are electrically connected through the conductor 33, so that a signal can be transmitted to the controller 4, thereby causing the controller 4 to control the control valve 2 to close, so as to block the air outlet 11 of the air filter housing 1, thereby preventing the water in the air filter housing 1 from entering the fuel cell system 200 and causing damage.

[0043] Furthermore, the water immersion identification device 3 also includes: a water immersion safety device 34, which is located at the lowest position in the chamber 3102. The water immersion safety device 34 is located between the positive electrode 3201 and the negative electrode 3202, and a conductor 33 is provided on one side of the water immersion safety device 34 in the direction of the line connecting the positive electrode 3201 and the negative electrode 3202. The water immersion safety device 34 is used to separate the conductor 33 from the positive electrode 3201 and the negative electrode 3202, and the conductor 33 can move from the first position to the second position after the water immersion safety device 34 is immersed in water.

[0044] like Figure 3 and Figure 4 As shown, in this embodiment, the opening 3101 of the chamber 3102 faces upwards, and the water immersion fuse 34 is positioned at the lowest point of the opening 3101 within the chamber 3102. A positive electrode 3201 and a negative electrode 3202 are respectively provided at the two transverse ends of the water immersion fuse 34, and a conductor 33 is provided on the upper longitudinal side of the water immersion fuse 34. This arrangement allows the conductor 33 to be separated from the positive electrode 3201 and the negative electrode 3202 when the water immersion fuse 34 is not immersed in water. At this time, the conductor 33 is in the first position, and the positive electrode 3201 and the negative electrode 3202 are electrically disconnected. After the water immersion fuse 34 is immersed in water, its strength drops sharply, and the conductor 33 can move downward from the first position to the second position. At this time, the water immersion fuse 34 is flattened, so that the two ends of the conductor 33 contact the positive electrode 3201 and the negative electrode 3202 respectively. At this time, the positive electrode 3201 and the negative electrode 3202 are electrically connected through the conductor 33, so a current signal (i.e., water immersion signal) can be transmitted to the controller 4.

[0045] Furthermore, the water immersion identification device 3 also includes: an elastic element 35, which is disposed in the chamber 3102 on the side of the conductor 33 facing away from the water immersion safety 34. One end of the elastic element 35 is connected to the chamber 3102 and the other end is connected to the conductor 33. The elastic element 35 is used to provide an elastic force to move the conductor 33 from a first position to a second position.

[0046] In this embodiment, the elastic element 35 is disposed on the longitudinal upper side of the conductor 33, the upper end of the elastic element 35 is connected to the cavity 3102, and the lower end of the elastic element 35 is connected to the conductor 33, such as... Figure 3 As shown, under normal operating conditions within the air filter housing 1, the forces between the elastic element 35 inside the chamber 3102 and the water immersion safety 34 at the bottom reach a state of equilibrium. At this time, the conductor 33 and the electrode 32 are in a separated state. Figure 4 As shown, when water is immersed in the air filter housing 1, the water immersion safety 34 at the bottom of the chamber 3102 is made of a special material, and its strength drops sharply after immersion. At this time, the elastic force of the elastic element 35 at the top of the chamber 3102 pushes the conductor 33 downward to squeeze the water immersion safety 34 to deform, so that the two ends of the conductor 33 can contact the positive electrode 3201 and the negative electrode 3202 of the electrode 32 to achieve electrical conduction.

[0047] In this embodiment, the water immersion protector 34 can be made of paper. This design ensures that the water immersion protector 34 has a certain compressive strength when not immersed in water, and that the material strength decreases sharply after immersion in water, thus meeting the usage requirements. Moreover, using paper material is inexpensive and suitable for mass production and application.

[0048] Furthermore, in this embodiment, the water immersion safety device 34 is a honeycomb structure, which is placed with its cell opening 3101 end face so that the honeycomb structure can be deformed in the longitudinal direction.

[0049] like Figure 5 As shown, the honeycomb structure is composed of a large number of hexagonal or other shaped small units. When subjected to external pressure, these units can evenly distribute the force to multiple contact points, rather than concentrating it at a single point. When an external force acts on the surface of the honeycomb structure, the force is rapidly transmitted to the entire interior of the structure, forming a three-dimensional stress network, thereby avoiding the occurrence of local stress concentration. Furthermore, the honeycomb structure achieves maximum structural strength with minimal material. Because its interior is filled with air or other low-density fillers, it is lightweight yet extremely rigid. Therefore, the water immersion safety device 34 can have high compressive strength when not immersed in water. Moreover, after the water immersion safety device 34 is immersed in water, because the honeycomb structure is placed with its unit openings 3101 end faces, the conductor 33 compresses the water immersion safety device 34 under the elastic force of the elastic member 35, causing the water immersion safety device 34 to deform rapidly in the longitudinal direction, so that the conductor 33 contacts the electrode 32 to achieve conductivity. This not only ensures that the material strength drops sharply after immersion in water, but also effectively improves the instantaneous response of the water immersion identification device 3.

[0050] As an example, the water immersion insurance 34 in this embodiment can be made of paper material with a honeycomb structure.

[0051] Therefore, the water immersion insurance 34 in this embodiment is fully applicable to the waterproof air filter housing 1, is inexpensive, and has the characteristic of being irreversible, thus avoiding damage caused by starting the fuel cell system 200 before the air filter housing 1 has been restored after the water immersion identification device 3 has dried.

[0052] Furthermore, grooves 3103 are formed on opposite sides of the chamber 3102, and the positive electrode 3201 and the negative electrode 3202 are respectively disposed in the grooves 3103. The dimension h1 of the water immersion safety 34 in the direction perpendicular to the line connecting the positive electrode 3201 and the negative electrode 3202 is greater than the dimension h2 of the groove 3103 in that direction.

[0053] In this embodiment, such as Figure 3 As shown, grooves 3103 are formed on opposite sides of the bottom of the chamber 3102. The positive electrode 3201 and the negative electrode 3202 are disposed opposite to each other in the grooves 3103, and one side of the positive electrode 3201 and the negative electrode 3202 is flush with the side wall of the chamber 3102, thereby ensuring that the conductor 33 can move smoothly from the first position to the second position and ensuring that both ends of the conductor 33 are in contact with the positive electrode 3201 and the negative electrode 3202 respectively.

[0054] Furthermore, the dimension h1 of the water immersion safety device 34 in the direction perpendicular to the line connecting the positive electrode 3201 and the negative electrode 3202 is greater than the dimension h2 of the groove 3103 in that direction. This arrangement ensures that the water immersion safety device 34 can separate the conductor 33 from the electrode 32 when it is not immersed in water. It should be noted that the direction perpendicular to the line connecting the positive electrode 3201 and the negative electrode 3202 refers to the longitudinal direction in this embodiment.

[0055] Furthermore, the housing 31 is a split housing 31. In this embodiment, the housing 31 can adopt a threaded detachable structure, which facilitates the installation of various components and the replacement of the water immersion safety 34.

[0056] In this embodiment, the water-proof system 100 further includes an air inlet pipe 5 and a water-filtering sponge 6. One end of the air inlet pipe 5 is connected to the outside, and the other end is connected to the air inlet 12 of the air filter housing 1. A rain cap and a vapor-water separator are installed inside the air inlet pipe 5. The water-filtering sponge 6 is installed inside the air inlet pipe 5 near the air inlet 12 of the air filter housing 1, or the water-filtering sponge 6 is installed at the air inlet 12 of the air filter housing 1.

[0057] Specifically, such as Figure 1As shown, the intake pipe 5 is responsible for drawing in relatively clean outside air from a higher position, while simultaneously filtering out liquid water from the air through a vapor-water separator, ensuring that the air entering the fuel cell system 200 is relatively dry and free of impurities. The rain cap is used to prevent rainwater from entering the air filter housing 1 through the intake pipe 5. Furthermore, the water-filtering sponge 6 can be placed inside the intake pipe 5 near the air inlet 12 of the air filter housing 1, or placed at the air inlet 12 of the air filter housing 1, further effectively preventing liquid water from the intake pipe 5 from entering the air filter housing 1.

[0058] Furthermore, the water ingress prevention system 100 also includes an alarm device, which is electrically connected to the water immersion detection device 3 and the controller 4 respectively. The alarm device is configured to issue an alarm signal based on the signal of water immersion in the air filter housing 1 detected by the water immersion detection device 3, and the controller 4 sends an alarm prompt to the cab.

[0059] This setup can alert the driver that there is a risk of water immersion in the air filter housing 1, allowing the driver to further check whether the fuel cell system 200 is shut down and to replace the water immersion fuse 34 in a timely manner.

[0060] A vehicle according to a second aspect of the present invention includes: a fuel cell system 200; a water ingress prevention system 100; and an air filter housing 1 connected to the fuel cell system 200.

[0061] The working process of the water ingress prevention system 100 in this embodiment is as follows: When the fuel cell system 200 is working normally, air first enters the intake pipe 5. After preliminary filtration through the centrifugal air passage of the intake pipe 5, the relatively dry air sequentially passes through the water-filtering sponge 6, the air inlet 12 of the air filter housing 1, the air filter element 14, and the air outlet 11 of the air filter housing 1 before entering the fuel cell system 200. When water enters the air filter housing 1, the water immersion detection device 3 identifies the fault. After identifying the fault, it sends a fault signal to the controller 4. The controller 4 executes the fast shutdown procedure and immediately closes the control valve 2 after completing the shutdown, thus protecting the fuel cell system 200.

[0062] Therefore, from the perspective of the entire vehicle, the water-proof system 100 of this embodiment solves the problem that there is currently no waterproof air filter housing 1 on the market, and can prevent damage to the fuel cell system 200 after the air filter housing 1 is immersed in water. From the system perspective, the air filter housing 1 is integrated, without increasing the number of parts in the vehicle, and is easily adopted by the vehicle manufacturer. Furthermore, the water immersion detection device 3 adopts a mechanical structure, which is simple and reliable, suitable for mass production, and has a small increase in cost. At the same time, the water immersion insurance 34 in the water immersion detection device 3 is completely applicable to the waterproof air filter housing 1, is inexpensive, and has the characteristic of being irreversible, preventing damage caused by starting the fuel cell system 200 before the air filter housing 1 has been restored after the water immersion detection device 3 has dried. In addition, the waterproof protection mechanism of this embodiment is safe and effective, and can ensure that the fuel cell system 200 will not be damaged by water ingress into the air filter housing 1 during startup, operation, and shutdown.

[0063] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model.

[0064] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0065] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A water-proofing system, characterized in that, include: Air filter housing; A control valve is disposed at the air outlet inside the air filter housing; A water immersion detection device is disposed at the lowest position inside the air filter housing; The controller is electrically connected to the control valve and the water immersion detection device, respectively. The controller is configured to control the control valve to close the air outlet based on the signal detected by the water immersion detection device that the air filter housing is immersed in water.

2. The water-proofing system according to claim 1, characterized in that, The water immersion identification device includes: A housing having an open chamber; An electrode is disposed in the chamber and electrically connected to the controller, the electrode comprising a positive electrode and a negative electrode; A conductor is movably disposed in the chamber and is used to move between a first position and a second position in the chamber; wherein, when water in the air filter housing flows into the chamber through the opening, the conductor moves from the first position to the second position to electrically connect the positive electrode and the negative electrode.

3. The water-proofing system according to claim 2, characterized in that, The water immersion identification device also includes: A water immersion safety device is provided, which is located at the lowest position in the chamber. The water immersion safety device is located between the positive electrode and the negative electrode, and the conductor is provided on one side of the line connecting the positive electrode and the negative electrode. The water immersion safety device is used to separate the conductor from the positive electrode and the negative electrode, and the conductor can move from the first position to the second position after the water immersion safety device is immersed in water.

4. The water-proofing system according to claim 3, characterized in that, The water immersion identification device also includes: An elastic element is disposed in the cavity on the side of the conductor opposite to the water immersion safety. One end of the elastic element is connected to the cavity and the other end is connected to the conductor. The elastic element is used to provide an elastic force that moves the conductor from the first position to the second position.

5. The water-proofing system according to claim 3, characterized in that, The water immersion insurance is a honeycomb structure, which is placed with its unit open end face so that the honeycomb structure can be deformed in the longitudinal direction.

6. The water-proofing system according to claim 3, characterized in that, The water immersion insurance is made of paper.

7. The water-proofing system according to claim 3, characterized in that, The chamber has grooves formed on opposite sides, and the positive electrode and the negative electrode are respectively disposed in the grooves. The dimension h1 of the water immersion safety device in the direction perpendicular to the line connecting the positive electrode and the negative electrode is greater than the dimension h2 of the groove in that direction.

8. The water-proofing system according to claim 1, characterized in that, Also includes: An air intake pipe, one end of which is connected to the outside and the other end of which is connected to the air inlet of the air filter housing, and a rain cap and a steam-water separator are installed inside the air intake pipe; A water-filtering sponge is disposed inside the air inlet pipe at one end near the air inlet of the air filter housing; or the water-filtering sponge is disposed at the air inlet of the air filter housing.

9. The water-proofing system according to claim 1, characterized in that, Also includes: An alarm device is electrically connected to the water immersion detection device and the controller, respectively. The alarm device is configured to issue an alarm signal based on the signal of water immersion in the air filter housing detected by the water immersion detection device, and the controller sends an alarm prompt to the driver's cab.

10. A vehicle, characterized in that, include: Fuel cell system; The water ingress prevention system according to any one of claims 1-9, wherein the air filter housing is connected to the fuel cell system.

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