Vehicle door opening system

Abstract

The utility model relates to a vehicle door opening system which comprises a water level detection device which is suitable for being installed on a vehicle body of a vehicle and comprises a shell, a water level detection device and a water level detection device. The signal circuit comprises at least two conductive contacts, the at least two conductive contacts are installed on the shell so as to be located in the inner cavity in a mutually separated mode, and the at least two conductive contacts are configured to conduct the signal circuit in the state that water entering the inner cavity from the external environment immerses the at least two conductive contacts; a water level alarm signal is generated; the vehicle door opening device is suitable for being installed on one of a vehicle door and a vehicle body of the vehicle, and the vehicle door opening device is in communication connection with the water level detection device and is configured to apply acting force for opening the vehicle door to the vehicle door at least based on the water level alarm signal. The vehicle door opening system can be automatically or manually started in time to open the vehicle door when the vehicle falls into water, is immersed in water and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle safety, and more specifically, to a vehicle door opening system. Background Art

[0002] A moving vehicle may have an accident. When a vehicle is in the event of falling into water or flooding, due to the large mass of the vehicle, it sinks into the water very quickly, and the excessive pressure in the water makes it difficult for the vehicle user (for example, the driver and other passengers) to open the door, causing life-threatening situations. Especially when a vehicle falls into water or floods in a sparsely populated area, it is difficult for the vehicle user to get help in time. Utility Model Content

[0003] An object of the utility model is to provide a vehicle door opening system, which is configured to be automatically or manually started in time to open the vehicle door when the vehicle is in an accident such as falling into water or being flooded.

[0004] According to one aspect of the utility model, a door opening system is provided, comprising: a water level detection device, which is suitable for being installed on a vehicle body and comprises: a shell, which defines an inner cavity connected to an external environment fluid relative to the shell; and a signal circuit, which comprises at least two conductive contacts, the at least two conductive contacts are installed on the shell to be located in the inner cavity separated from each other, and the at least two conductive contacts are configured to conduct the signal circuit in a state where water entering the inner cavity from the external environment submerges the at least two conductive contacts to generate a water level alarm signal; and a door opening device, which is suitable for being installed on one of the door and the body of the vehicle, the door opening device is communicatively connected to the water level detection device, and is configured to apply a force to the door to open the door based on at least the water level alarm signal.

[0005] Optionally, the shell includes: a curved portion located above the at least two conductive contacts, which is bent 180 degrees to have a first end and a second end that are open downward; and a straight portion located below the at least two conductive contacts, which is upright to have a first end that is open upward and a second end that is open downward, the at least two conductive contacts are placed between the first end of the curved portion and the first end of the straight portion so as to be located in the inner cavity separated from each other, thereby protecting the at least two conductive contacts from dust or splashing water from the external environment, and the at least two conductive contacts are configured to turn on the signal circuit to generate a water level alarm signal when water entering the inner cavity from the external environment through the second end of the curved portion and / or the second end of the straight portion submerges the at least two conductive contacts.

[0006] Optionally, the water level detection device is suitable for being installed to the front longitudinal beam and / or rear longitudinal beam of the vehicle body so that the height of the at least two conductive contacts is in the range of 1 / 4 to 1 / 3 of the height of the vehicle, and the height of the highest point of the curved portion is higher than the height of the at least two conductive contacts.

[0007] Optionally, the door opening device includes: a piston cylinder having a closed end and an open end; a first piston located in the piston cylinder; a second piston, one end of the second piston being located in the piston cylinder, and the other end of the second piston being configured to extend from the open end to abut against the other of the door and the vehicle body, wherein air fills a first space of the piston cylinder between the first piston and the closed end, and hydraulic oil fills a second space of the piston cylinder between the first piston and the second piston, and the first space and the second space are not fluidically connected to each other; and an ignition component and an ignition agent located in the first space, the ignition component being configured to ignite the ignition agent based on the water level alarm signal so that the air is pressurized, the pressurized air pushes the first piston to move in the piston cylinder to squeeze the hydraulic oil, and the squeezed hydraulic oil further pushes the one end of the second piston to move in the piston cylinder, so that the other end of the second piston pushes the other of the door and the vehicle body, thereby applying a force to the door to open the door.

[0008] Optionally, the door opening device also includes a one-way valve, which divides the second space into a first subspace close to the first piston and a second subspace close to the second piston, and the one-way valve is configured to allow the hydraulic oil to flow from the first subspace to the second subspace and prevent the hydraulic oil from flowing from the second subspace to the first subspace.

[0009] Optionally, the ignition assembly includes: a fuse located in the first space, the ignition agent is arranged around the fuse; a battery electrically connectable to the fuse; an insulating sheet located between the battery and the fuse to disconnect the electrical connection between the fuse and the battery; and an action element, which is configured to remove the insulating sheet from between the battery and the fuse based on the water level alarm signal to achieve electrical connection between the fuse and the battery, so that the fuse can be heated up with the help of the power supply of the battery to ignite the ignition agent, and melt when the temperature is heated to a certain temperature.

[0010] Optionally, the ignition assembly further comprises a pull ring connected to the insulating sheet, the pull ring being configured to be pulled by a vehicle user to remove the insulating sheet from between the battery and the fuse.

[0011] Optionally, the actuating element is configured as a solenoid valve.

[0012] Optionally, the door opening system also includes a door locking device, which includes a door locking structure, a part of which is suitable for being installed on the door and another part of which is suitable for being installed on the vehicle body, and the door locking device is configured to lock the door when the door is closed relative to the vehicle body, and is also configured to unlock the door at least based on the water level alarm signal.

[0013] Optionally, the vehicle door is a flat-hinged door with a hinge or a pivot, and the door opening device is installed to a portion of one of the vehicle door and the vehicle body along the longitudinal direction of the vehicle, away from the hinge or the pivot, and the portion is close to the door locking structure, wherein a centerline of the first piston is perpendicular to a centerline of the second piston; or, the vehicle door is a sliding door, and the door opening device is installed to a portion of one of the vehicle door and the vehicle body, close to the door locking structure, so that the second piston abuts against the other of the vehicle door and the vehicle body along the sliding door, wherein the centerline of the first piston coincides with the centerline of the second piston.

[0014] The door opening system provided by the utility model detects whether the vehicle is in an accident such as falling into water or flooding by arranging a water level detection device on the body of the vehicle, and automatically or manually starts to open the door when the vehicle is in an accident such as falling into water or flooding by arranging the door opening device on one of the door and the body. Moreover, the housing of the water level detection device protects the at least two conductive contacts so as not to be affected by dust or splashing water from the external environment. In addition, it is also possible to manually start the door opening device in time to open the door when the vehicle is in an accident other than falling into water or flooding by arranging a pull ring. In addition, the center line of the first piston can be perpendicular to or parallel to the center line of the second piston, and the force applied by the door opening device to open the door can be flexibly designed based on different door types.

[0015] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, are used to explain the principles of the present invention.

[0017] Figure 1It is a block diagram of a vehicle door opening system according to one embodiment of the utility model.

[0018] Figure 2 Schematic diagram of a vehicle body on which a door opening system according to an embodiment of the present invention may be installed.

[0019] Figure 3 yes Figure 2 A complete schematic diagram of the vehicle.

[0020] Figure 4 It is a schematic diagram of a water level detection device of a vehicle door opening system according to an embodiment of the present utility model.

[0021] Figure 5 2 is a schematic diagram of a door opening device of a door opening system according to an embodiment of the present invention.

[0022] Figure 6 It is a schematic diagram of a door opening device of a door opening system according to another embodiment of the present invention. DETAILED DESCRIPTION

[0023] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0024] Techniques and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the techniques and equipment should be considered part of the specification.

[0025] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0026] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0027] It should be noted that unless otherwise explicitly stated, the terms such as "installation / connection" should be understood in a broad sense. For example, these terms may refer to fixed installation / connection, detachable installation / connection, or integration; for another example, these terms may refer to direct installation / connection, or indirect installation / connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of these terms in this utility model can be understood according to specific circumstances.

[0028] Reference Figure 1 The exemplary vehicle door opening system 10 mainly includes: a water level detection device 12, which is suitable for installation on Figure 2 The body 16 of the vehicle 14 shown in the figure, for example, is mounted to the front longitudinal beam 16a and / or the rear longitudinal beam 16b of the body 16, so as to be configured to determine whether the vehicle 14 is in an accident such as falling into water or flooding, and to generate a water level alarm signal when it is determined that the vehicle 14 is in an accident such as falling into water or flooding; and a door opening device 18, which is suitable for being mounted to Figure 3 The vehicle 14 shown has one of the door 20 and the vehicle body 16, and the door opening device 18 is communicatively connected to the water level detection device 12 to apply a force to the door 20 to open the door 20 based on the water level alarm signal from the water level detection device 12. It can be understood that the force applied by the door opening device 18 to open the door 20 will be much greater than the force applied by the vehicle user to open the door 20 under normal circumstances. Therefore, even if the vehicle 14 is in an accident such as falling into water or flooding, so that the door 20 is under excessive pressure in the water and is difficult to be opened by the vehicle user, the door 20 can be opened by the door opening device 18. It can also be understood that the number of water level detection devices 12 can be multiple, and accordingly, as shown in FIG. Figure 2 The front longitudinal beam 16a of the vehicle body 16 shown in the figure includes two front longitudinal beams, and the rear longitudinal beam 16b of the vehicle body 16 includes two rear longitudinal beams 16b, so the plurality of water level detection devices 12 can be respectively installed to the two front longitudinal beams and / or the two rear longitudinal beams. Similarly, the number of the door opening devices 18 is also multiple, for example, the number of the plurality of door opening devices 18 is at least equal to the number of the plurality of door opening devices 18 as shown in the figure. Figure 3 The number of vehicle doors 20 shown is equal, that is, each of the multiple door opening devices 18 corresponds to a corresponding vehicle door 20, and then, each of the multiple door opening devices 18 can be communicatively connected to the multiple water level detection devices 12, so that each of the multiple door opening devices 18 applies a force to open the corresponding vehicle door 20 based on the water level alarm signal from at least one of the multiple water level detection devices 12.

[0029] In addition, continue to refer to Figure 1 The vehicle door opening system 10 may further include a vehicle door locking device 22, the vehicle door locking device 22 further includes a vehicle door locking structure, a portion of which is suitable for installation on a vehicle door locking structure such as Figure 3 The vehicle door 20 shown and another part of the vehicle door locking structure are suitable for installation on Figure 3In the vehicle body 16 shown, when the vehicle door 20 is closed relative to the vehicle body 16, the one part of the vehicle door locking structure is combined with the other part to firmly lock the vehicle door 20. The vehicle door locking device 22 can be configured to unlock the vehicle door 20 based on the water level alarm signal from the water level detection device 12, and then the vehicle door opening device 18 is activated again. The number of the vehicle door locking devices 22 is also multiple.

[0030] Reference Figure 4 Specifically, the water level detection device 12 may include: a shell 24, which defines an inner cavity 25 connected to the external environment fluid relative to the shell 24, for example, the shell 24 may be tubular; and a signal circuit 26, which includes at least two conductive contacts, for example, a pair of conductive contacts 26a, 26b, the pair of conductive contacts 26a, 26b are installed to the tubular shell 24 to be located in the inner cavity 25 separated from each other, and the pair of conductive contacts 26a, 26b are configured to turn on the signal circuit 26 when water entering the inner cavity 25 from the external environment submerges the pair of conductive contacts 26a, 26b, so as to generate a water level alarm signal representing that the water level has exceeded the height at which the pair of conductive contacts 26a, 26b are located.

[0031] Depend on Figure 4It can be seen that the tubular housing 24 may be generally in the shape of an umbrella handle, and the cross section or radial section of the tubular housing 24 may be circular, square or any suitable shape, but it is understandable that the housing 24 may not be tubular. More specifically, the housing 24 may include: a bent portion 28 located above the pair of conductive contacts 26a, 26b (i.e., above in the vertical direction of the vehicle 14), the bent portion 28 being bent 180 degrees, i.e., the curvature of the bent portion 28 being 180 degrees, so as to be in a semicircular shape, and therefore, the bent portion 28 has a first end 28a and a second end 28b that are open downward, preferably open downward; and a straight portion 30 located below the pair of conductive contacts 26a, 26b (i.e., below in the vertical direction of the vehicle 14), the straight portion 30 standing upright to have a first end 30a that is open upward, preferably open upward, and a second end 30b that is open downward, preferably open downward, the first end 28a of the bent portion 28 being connected to the first end 30a of the straight portion 30, and the pair of conductive contacts 26a, 26b being disposed, for example, inserted between the first end 28a of the bent portion 28 and the first end 30a of the straight portion 30, so as to be located in the inner cavity 25 spaced apart from each other. In this way, the pair of conductive contacts 26a, 26b are protected from dust or splashing water from the external environment. That is, due to the existence of the curved portion 28, dust or splashing water from the external environment cannot touch the pair of conductive contacts 26a, 26b from above the pair of conductive contacts 26a, 26b, and due to the existence of the straight portion 30 and gravity, dust or splashing water from the external environment is not easy to rise from below the pair of conductive contacts 26a, 26b to touch the pair of conductive contacts 26a, 26b. When the vehicle 14 is indeed in an accident such as falling into water or flooding, water entering the inner cavity 25 from the external environment through the second end 28b of the curved portion 28 and / or the second end 30b of the straight portion 30 will submerge the pair of conductive contacts 26a, 26b. Water is a conductive substance and will cause the pair of conductive contacts 26a, 26b that were originally separated to be electrically connected to turn on the signal circuit 26, thereby generating a water level alarm signal. Moreover, the height of the highest point of the curved portion 28 will be higher than the height of the pair of conductive contacts 26a, 26b, so that if the gas in the water accumulates in the inner cavity 25 and turns into bubbles, the bubbles will rise to the highest point of the curved portion 28 due to their lighter weight than water. Therefore, the bubbles will not hinder the pair of conductive contacts 26a, 26b from being electrically connected due to water at the height of the pair of conductive contacts 26a, 26b. Figure 2As shown, when the water level detection device 12 is mounted to the front longitudinal beam 16a and / or the rear longitudinal beam 16b of the vehicle body 16, the height of the pair of conductive contacts 26a, 26b is within the range of 1 / 4 to 1 / 3 of the height of the vehicle 14, thereby ensuring that the door 20 is opened in time before the vehicle 14 falls into the water and is immersed in deeper water. It can be understood that the at least two conductive contacts can be located on the same or different height planes.

[0032] Reference Figure 5 and Figure 6 Specifically, the door opening device 18 may include: a piston cylinder 32 having a closed end 32a and an open end 32b; a first piston 34 completely located in the piston cylinder 32; and a second piston 36, one end of which is located in the piston cylinder 32, and the other end of which is configured to extend from the open end 32b to abut against the other of the door 20 and the vehicle body 16, that is, when the door opening device 18 is mounted to the vehicle door 20, the other end of the second piston 36 abuts against a suitable position of the vehicle body 16, and when the door opening device 18 is mounted to the vehicle body 16, the other end of the second piston 36 abuts against a suitable position of the vehicle door 20. In addition, air fills a first space 38 of the piston cylinder 32 between the first piston 34 and the closed end 32a, and hydraulic oil fills a second space 40 of the piston cylinder 32 between the first piston 34 and the second piston 36. A first sealing ring is provided between the first piston 34 and the piston cylinder 32 to prevent the first space 38 and the second space 40 from being fluidically connected to each other, and a second sealing ring is provided between the second piston 36 and the piston cylinder 32 to prevent the second space 40 from being fluidically connected to the external environment relative to the vehicle door opening device 18.

[0033] The door opening device 18 may also include an ignition component 50 and an ignition agent 43 located in the first space 38. The ignition agent 43 may include black powder (currently, black powder has been widely used in airbags), and the ignition component 50 is configured to ignite the ignition agent 43 based on a water level alarm signal to pressurize the air in the first space 38. The pressurized air pushes the first piston 34 to move in the piston cylinder 32 to squeeze the hydraulic oil in the second space 40. The squeezed hydraulic oil further pushes one end of the second piston 36 to move in the piston cylinder 32, so that the other end of the second piston 36 pushes the other of the door 20 and the body 16, thereby applying a force to the door 20 to open the door 20.

[0034] In the event of a failure of the piston cylinder 32 or the first piston 34, the pressurized air in the first space 38 may leak rapidly, causing the hydraulic oil to push back the first piston 34. To this end, a one-way valve 42 may be provided between the first piston 34 and the second piston 36 to divide the second space 40 into a first subspace 40a close to the first piston 34 and a second subspace 40b close to the second piston 36. The one-way valve 42 is configured to allow the hydraulic oil to flow from the first subspace 40a to the second subspace 40b and prevent the hydraulic oil from flowing from the second subspace 40b to the first subspace 40a, so as to ensure that the energy generated by the ignition agent 43 after being ignited can be used to the maximum extent to exert the force to open the door 20. The one-way valve 42 can be in various forms. Generally speaking, the one-way valve 42 can be a valve core that is pressed against a valve seat by means of a spring. When the hydraulic oil tends to flow from the first subspace 40a to the second subspace 40b, the hydraulic oil can push the valve core away from the valve seat against the elastic force of the spring.

[0035] Continue to refer to Figure 5 and Figure 6 For example, the ignition assembly 50 may include: a fuse 52 located in the first space 38, and an ignition agent 43 is arranged around the fuse 52; a battery 56 located outside the first space 38, for example, the fuse 52 can be connected in series to the battery 56 using multiple wires 54, so that the fuse 52 can be electrically connected to the battery 56; an insulating sheet 58, for example, a flexible insulating film, when the door opening system 10 has not been started, the insulating sheet 58 is located between the battery 56 and the fuse 52 to disconnect the electrical connection between the fuse 52 and the battery 56; and an action element 60, which is configured to remove the insulating sheet 58 from between the battery 56 and the fuse 52 based on the water level alarm signal to achieve the electrical connection between the fuse 52 and the battery 56, so that the fuse 52 can be heated with the help of the power supply of the battery 56 to ignite the ignition agent 43, and the fuse 52 will melt itself when it is heated to a certain temperature after being powered for a period of time, thereby timely disconnecting the electrical connection between the fuse 52 and the battery 56 again. For example, the actuating element 60 may be configured as a valve, such as a solenoid valve, and a plunger of the solenoid valve will be connected to the insulating sheet 58 .

[0036] Optionally, the ignition assembly 50 further includes a pull ring 62 connected to the insulating sheet 58, and the pull ring 62 is configured to be pulled by the vehicle user to remove the insulating sheet 58 from between the battery 56 and the fuse 52. Due to the presence of the pull ring 62, the door opening device 18 can be manually activated in the event that the water level detection device 12 fails. In addition, in other accidents other than falling into water, flooding, etc., for example, in an accident such as a fire in the vehicle 14, the vehicle user can also use the pull ring 62 to timely activate the door opening device 18 to quickly and forcefully open the door 20.

[0037] It is understandable that there are many types of vehicle doors 20, such as Figure 3 As shown, when the vehicle door 20 is a flat door with a hinge or a rotating shaft, in order to achieve as large a rotation torque as possible by means of the force applied by the vehicle door opening device 18 to open the vehicle door 20, the vehicle door opening device 18 can be installed to a portion of one of the vehicle door 20 and the vehicle body 16 that is away from the hinge or the rotating shaft along the longitudinal direction of the vehicle 14, and such a portion can be close to the vehicle door locking structure. When the vehicle door 20 is a sliding door, the vehicle door opening device 18 can be installed to a portion of one of the vehicle door 20 and the vehicle body 16 that is close to the vehicle door locking structure, so that the second piston 36 abuts against the other of the vehicle door 20 and the vehicle body 16 along the sliding direction of the vehicle door 20.

[0038] In addition, in order to flexibly design the force applied by the door opening device 18 to open the door 20, for a flat door, Figure 5 As shown, the center line of the first piston 34 is perpendicular to the center line of the second piston 36, that is, the first moving path that the first piston 34 can move through in the piston cylinder 32 is perpendicular to the second moving path that the second piston 36 can move through in the piston cylinder 32 (as shown by the arrow). Figure 6 As shown, the center line of the first piston 34 coincides with the center line of the second piston 36 , that is, a first movement path through which the first piston 34 can move in the piston cylinder 32 is parallel to a second movement path through which the second piston 36 can move in the piston cylinder 32 .

[0039] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A vehicle door opening system (10), characterized in that: include: A water level detection device (12) adapted to be mounted to a body (16) of a vehicle (14) and comprising: a housing (24) defining an interior cavity (25) in fluid communication with an environment relative to the housing (24); and a signal circuit (26), comprising at least two conductive contacts, the at least two conductive contacts being mounted to the housing (24) so ​​as to be located in the inner cavity (25) in a spaced relationship from each other, and the at least two conductive contacts being configured to conduct the signal circuit (26) when water entering the inner cavity (25) from the external environment submerges the at least two conductive contacts, so as to generate a water level alarm signal; and A vehicle door opening device (18) is suitable for being installed on one of a vehicle door (20) and a vehicle body (16) of the vehicle (14); the vehicle door opening device (18) is communicatively connected to the water level detection device (12) and is configured to apply a force to the vehicle door (20) to open the vehicle door (20) based at least on the water level alarm signal.

2. The vehicle door opening system (10) according to claim 1, characterized in that: The housing (24) comprises: a bent portion (28) located above the at least two conductive contacts, which is bent 180 degrees to have a first end and a second end open downward; and a straight portion (30) located below the at least two conductive contacts, which stands upright to have a first end open upward and a second end open downward, The at least two conductive contacts are disposed between the first end of the curved portion (28) and the first end of the straight portion (30) so as to be located in the inner cavity (25) separated from each other, thereby protecting the at least two conductive contacts from dust or splashing water from the external environment, and the at least two conductive contacts are configured to turn on the signal circuit (26) when water from the external environment entering the inner cavity (25) through the second end of the curved portion (28) and / or the second end of the straight portion (30) submerges the at least two conductive contacts, so as to generate a water level alarm signal.

3. The vehicle door opening system (10) according to claim 2, characterized in that: The water level detection device (12) is suitable for being mounted on a front longitudinal beam (16a) and / or a rear longitudinal beam (16b) of the vehicle body (16), so that the height of the at least two conductive contacts is within a range of 1 / 4 to 1 / 3 of the height of the vehicle (14), and the height of the highest point of the curved portion (28) is higher than the height of the at least two conductive contacts.

4. The vehicle door opening system (10) according to any one of claims 1 to 3, characterized in that: The vehicle door opening device (18) comprises: a piston cylinder (32) having a closed end (32a) and an open end (32b); a first piston (34) located in the piston cylinder (32); a second piston (36), one end of the second piston (36) being located in the piston cylinder (32), and the other end of the second piston (36) being configured to extend from the open end (32b) to abut against the other of the vehicle door (20) and the vehicle body (16), wherein air fills a first space (38) of the piston cylinder (32) between the first piston (34) and the closed end (32a), and hydraulic oil fills a second space (40) of the piston cylinder (32) between the first piston (34) and the second piston (36), and the first space (38) and the second space (40) are not in fluid communication with each other; and An ignition component (50) and an ignition agent (43) located in the first space (38), wherein the ignition component (50) is configured to ignite the ignition agent (43) based on the water level alarm signal to pressurize the air, wherein the pressurized air pushes the first piston (34) to move in the piston cylinder (32) to squeeze the hydraulic oil, and the squeezed hydraulic oil further pushes the one end of the second piston (36) to move in the piston cylinder (32) so that the other end of the second piston (36) pushes the other of the vehicle door (20) and the vehicle body (16), thereby applying a force to the vehicle door (20) to open the vehicle door (20).

5. The vehicle door opening system (10) according to claim 4, characterized in that: The door opening device (18) further includes a one-way valve (42), which divides the second space (40) into a first subspace (40a) close to the first piston (34) and a second subspace (40b) close to the second piston (36), and the one-way valve (42) is configured to allow the hydraulic oil to flow from the first subspace (40a) to the second subspace (40b) and prevent the hydraulic oil from flowing from the second subspace (40b) to the first subspace (40a).

6. The vehicle door opening system (10) according to claim 4, characterized in that: The ignition assembly (50) comprises: a fuse (52) located in the first space (38), the ignition agent (43) being arranged around the fuse (52); a battery (56) electrically connectable to the fuse (52); an insulating sheet (58) located between the battery (56) and the fuse (52) to disconnect the electrical connection between the fuse (52) and the battery (56); and An action element (60) is configured to remove the insulating sheet (58) from between the battery (56) and the fuse (52) based on the water level alarm signal to achieve electrical connection between the fuse (52) and the battery (56), so that the fuse (52) can be heated up with the help of the power supply of the battery (56) to ignite the ignition agent (43) and melt when the temperature reaches a certain level.

7. The vehicle door opening system (10) according to claim 6, characterized in that: The ignition assembly (50) also includes a pull ring (62) connected to the insulating sheet (58), the pull ring (62) being configured to be pulled by a vehicle user to remove the insulating sheet (58) from between the battery (56) and the fuse (52).

8. The vehicle door opening system (10) according to claim 6, characterized in that: The actuating element (60) is configured as a solenoid valve.

9. The vehicle door opening system (10) according to claim 4, characterized in that: The vehicle door opening system (10) further comprises a vehicle door locking device (22), the vehicle door locking device (22) comprising a vehicle door locking structure, a portion of the vehicle door locking structure being suitable for being mounted on the vehicle door (20) and another portion of the vehicle door locking structure being suitable for being mounted on the vehicle body (16), and the vehicle door locking device (22) being configured to lock the vehicle door (20) when the vehicle door (20) is in a closed state relative to the vehicle body (16), and being further configured to unlock the vehicle door (20) based at least on the water level alarm signal.

10. The vehicle door opening system (10) according to claim 9, characterized in that: The vehicle door (20) is a flat-opening vehicle door having a hinge or a rotating shaft, the vehicle door opening device (18) is installed to a portion of one of the vehicle door (20) and the vehicle body (16) away from the hinge or the rotating shaft along the longitudinal direction of the vehicle (14), and the portion is close to the vehicle door locking structure, wherein the center line of the first piston (34) is perpendicular to the center line of the second piston (36); or, The vehicle door (20) is a sliding door, and the vehicle door opening device (18) is installed to a portion of one of the vehicle door (20) and the vehicle body (16) close to the vehicle door locking structure, so that the second piston (36) abuts against the other of the vehicle door (20) and the vehicle body (16) along the sliding door, wherein the center line of the first piston (34) coincides with the center line of the second piston (36).

Images