Filling device, urea system and vehicle

Abstract

The invention provides a filling device, a urea system and a vehicle, and belongs to the technical field of vehicles, and the filling device comprises a filling pipe provided with an inlet and an outlet; the electric valve assembly is used for communicating or blocking the outlet and the inlet; the first sensing module is used for detecting whether a fluid substance flowing in from the inlet has conductivity or not; the control module is connected with the electric valve assembly and the first sensing module, and the control module is used for controlling the electric valve assembly to communicate with the outlet and the inlet under the condition that the fluid substance has conductivity and controlling the electric valve assembly to communicate with the outlet and the inlet under the condition that the fluid substance does not have conductivity. And the electric valve assembly is controlled to block the outlet and the inlet. According to the filling device, on the basis that the normal urea filling function is achieved, mistaken adding of diesel oil is avoided, and therefore the situation that urea in the urea box is polluted by the diesel oil or a urea pump is damaged is prevented.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a filling device, a urea system and a vehicle. Background Art

[0002] As the demand for exhaust gas cleaning increases, vehicles powered by diesel will use urea to reduce nitrogen oxides in exhaust gas before emitting the exhaust gas. Accordingly, vehicles also need to replenish urea regularly.

[0003] In the related art, the urea filling port is adjacent to the fuel filling port, and the two share the same body filling port. Therefore, when users fill diesel, they are prone to mistakenly add diesel into the urea tank, thereby contaminating the urea aqueous solution and causing irreversible damage to components such as the urea pump. Summary of the invention

[0004] Based on this, the present application provides a filling device, a urea system and a vehicle to solve the problem of how to prevent diesel from being mistakenly added into a urea tank.

[0005] In a first aspect of an embodiment of the present application, a filling device is provided, the filling device comprising: A filling pipe provided with an inlet and an outlet; An electric valve assembly is arranged in the lumen of the filling pipe and is located between the inlet and the outlet; the electric valve assembly is used to connect or block the outlet and the inlet; A first sensing module is disposed in the lumen between the outlet and the inlet, and is used to detect whether the fluid material flowing in from the inlet has conductivity; A control module is connected to the electric valve assembly and the first sensing module, respectively. The control module is used to control the electric valve assembly to connect the outlet and the inlet when the fluid material is conductive, and to control the electric valve assembly to block the outlet and the inlet when the fluid material is not conductive.

[0006] Optionally, the first sensing module comprises: a sensing circuit and a containing cavity, wherein the containing cavity is located in the lumen between the outlet and the inlet, and the containing cavity is used to contain the fluid material flowing in from the inlet; The induction circuit includes a battery, a first wire and a second wire, one end of the first wire is connected to the battery and the other end is exposed in the accommodating cavity, and one end of the second wire is connected to the battery and the other end is exposed in the accommodating cavity; The first sensing module further includes: A first detection unit connected to the sensing circuit and the control module respectively, the first detection unit is used to determine that the fluid material has conductivity when the fluid material conducts the sensing circuit; and to determine that the fluid material does not have conductivity when the fluid material disconnects the sensing circuit.

[0007] The first sensing unit described in this embodiment can determine whether the fluid material is conductive by detecting whether the fluid material can conduct the sensing circuit, thereby simplifying the structure of the first sensing unit, so that the present application can detect the conductivity of the fluid material in a simple manner, thereby reducing the production cost of the diesel filling device.

[0008] Optionally, the accommodating chamber is located on a side of the electric valve assembly close to the inlet, and the surface of the electric valve assembly and the tube wall of the filling pipe together form the accommodating chamber.

[0009] In this embodiment, the accommodating chamber is arranged on the side of the electric valve assembly close to the inlet, and the accommodating chamber is enclosed by the surface of the electric valve assembly and the tube wall of the filling pipe, thereby avoiding the additional arrangement of the chamber wall of the accommodating chamber and reducing the manufacturing cost of the filling device. At the same time, the accommodating chamber is directly placed on the side of the electric valve assembly close to the inlet, and the distance between the inlet of the filling pipe and the accommodating chamber is shortened, so that the fluid material flowing into the inlet can reach the accommodating chamber more quickly, thereby accelerating the reaction speed of the electric valve assembly.

[0010] Optionally, the filling device further comprises a throat assembly, wherein the throat assembly comprises a throat connected to the inlet and a cover plate movably connected to the throat; The cover plate is connected to the first sensing module, and the first sensing module is used to detect whether the fluid material flowing in from the inlet has conductivity when the cover plate moves in a direction away from the throat.

[0011] This embodiment determines whether the user has a need for refilling by the direction of movement of the cover plate relative to the throat, and then starts detecting the conductivity of the fluid material only when the user has a need for refilling, thereby reducing the energy consumed by the first sensing module and improving the greenness of the refilling device.

[0012] Optionally, the electric valve assembly includes a coil, a first magnet, a spring and a valve, the valve is arranged in the tube cavity of the filling pipe, the coil is connected to the tube wall of the filling pipe, the first magnet is connected to the valve, one end of the spring is connected to the tube wall and the other end is connected to the valve; The control module is connected to the coil, and is specifically used to control the coil to be energized when the fluid material is conductive, so that the magnetic field generated by the coil drives the first magnet to drive the valve to connect the outlet and the inlet, and to control the coil to be de-energized when the fluid material is not conductive, so that the spring drives the valve to block the outlet and the inlet.

[0013] This embodiment uses the first magnet, the coil and the spring to achieve communication and blocking between the outlet and the inlet of the filling pipe when the electric valve assembly is in the power-on state and the power-off state, thereby simplifying the structure of the filling device.

[0014] Optionally, the filling device further comprises a second sensing module connected to the control module, the second sensing module being used to determine whether the filling gun is a target filling gun when a filling gun is inserted into the inlet; The control module is also used to control the electric valve assembly to connect the outlet and the inlet when the filling gun is the target filling gun or the fluid material is conductive, and to control the electric valve assembly to disconnect the outlet and the inlet when the filling gun is not the target filling gun and the fluid material is not conductive.

[0015] The second sensing module of this embodiment can enable the filling device to quickly connect the outlet and the inlet of the filling pipe when the target filling gun is detected to be inserted, thereby accelerating the response speed of the filling device and improving the user's filling efficiency.

[0016] Optionally, the target filling gun is made of metal, the second sensing module includes a second magnet distributed along the caliber of the inlet, and a second detection unit connected to the second magnet, and the second detection unit is connected to the control module; In this embodiment, when the material of the target filling gun is metal, a second magnet is provided in the second sensing module, so as to judge whether the filling gun is the target filling gun based on the principle of electromagnetic induction, so that the second sensing module can realize detection without power supply, thereby reducing the energy consumption required for detection.

[0017] Optionally, the electric valve assembly is provided with a sealing ring; When the electric valve assembly disconnects the inlet and the outlet, the sealing ring fits against the wall of the filling pipe.

[0018] The sealing ring in this embodiment can enhance the sealing between the electric valve assembly and the pipe wall when the inlet and the outlet of the electric valve assembly 2 are disconnected, thereby preventing fluid substances from seeping out of the gap between the electric valve assembly and the pipe wall.

[0019] A second aspect of the embodiment of the present application provides a urea system, wherein the urea system includes the filling device described in the first aspect of the embodiment of the present application.

[0020] A third aspect of the embodiments of the present application provides a vehicle, comprising the urea system of the second aspect of the embodiments of the present application, or comprising the filling device described in the first aspect of the embodiments of the present application.

[0021] The present application provides a filling device, a urea system and a vehicle, and the method includes: the filling device includes: a filling pipe, which is provided with an inlet and an outlet; an electric valve assembly, which is arranged in the tube cavity of the filling pipe and is located between the inlet and the outlet; the electric valve assembly is used to connect or block the outlet and the inlet; a first sensing module, which is arranged in the tube cavity between the outlet and the inlet, and the first sensing module is used to detect whether the fluid material flowing into the inlet from the inlet has conductivity; a control module, which is connected to the electric valve assembly and the first sensing module respectively, and the control module is used to control the electric valve assembly to connect the outlet and the inlet when the fluid material has conductivity, and to control the electric valve assembly to block the outlet and the inlet when the fluid material does not have conductivity.

[0022] The filling device in the present application includes a filling pipe, an electric valve assembly, a first sensing module and a control module. When the first sensing module senses that the fluid material filled from the inlet of the filling pipe is conductive, the control module controls the electric valve assembly to connect the outlet and the inlet of the filling pipe so that the fluid material can flow further to the outlet; when the first sensing module senses that the fluid material filled from the inlet of the filling pipe is not conductive, the control module controls the electric valve assembly to block the outlet and the inlet of the filling pipe to prevent the fluid material from flowing further to the outlet. Since diesel is not conductive and urea is conductive, when the user fills diesel into the urea tank through the inlet, the diesel cannot flow further to the urea tank, and when the user fills urea, the urea can flow into the urea tank normally. Therefore, the filling device described in the present application can avoid the accidental addition of diesel on the basis of realizing the normal urea filling function, thereby preventing diesel from contaminating the urea in the urea tank or damaging the urea pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0024] Figure 1 is a front view of a filling device provided in an embodiment of the present application; Figure 2 is a cross-sectional view of the filling device at AA provided in an embodiment of the present application; Figure 3 is a cross-sectional view of the filling device at BB provided in an embodiment of the present application; Figure 4 is a schematic diagram of the structure of a first sensing module provided in an embodiment of the present application; Figure 5 It is a structural schematic diagram of a filling device provided with a throat assembly provided in an embodiment of the present application; Figure 6 It is a structural schematic diagram of a second sensing module provided in an embodiment of the present application.

[0025] Description of labels: 1-filling pipe, 2-electric valve assembly, 21-coil, 22-first magnet, 23-spring, 24-valve, 25-sealing ring, 3-control module, 4-first sensing module, 41-sensing circuit, 411-battery, 412-first wire, 413-second wire, 42-accommodating chamber, 43-first detection unit, 5-throat assembly, 51-throat, 52-cover plate, 6-second sensing module, 61-second magnet, 62-second detection unit. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0027] As the demand for exhaust gas cleaning increases, vehicles powered by diesel will use urea to reduce nitrogen oxides in exhaust gas before emitting the exhaust gas. Accordingly, vehicles also need to replenish urea regularly.

[0028] In the related art, the urea filling port is adjacent to the fuel filling port, and the two share the same body filling port. Therefore, when users fill diesel, they are prone to mistakenly add diesel into the urea tank, thereby contaminating the urea aqueous solution and causing irreversible damage to components such as the urea pump.

[0029] Based on this, in order to solve the problem of how to avoid diesel from being added into the urea tank by mistake, the present application provides a filling device, a urea system and a vehicle, wherein the filling device includes a filling pipe, an electric valve assembly, a first sensing module and a control module. When the first sensing module senses that the fluid material added from the inlet of the filling pipe is conductive, the control module controls the electric valve assembly to connect the outlet and the inlet of the filling pipe so that the fluid material can flow further to the outlet; when the first sensing module senses that the fluid material added from the inlet of the filling pipe is not conductive, the control module controls the electric valve assembly to block the outlet and the inlet of the filling pipe to prevent the fluid material from flowing further to the outlet. Since diesel is not conductive and urea is conductive, when the user adds diesel into the urea tank through the inlet, the diesel cannot flow further into the urea tank, and when the user adds urea, the urea can flow into the urea tank normally. Therefore, the filling device described in the present application can avoid the accidental addition of diesel on the basis of realizing the normal urea filling function, thereby preventing diesel from contaminating the urea in the urea tank or damaging the urea pump. The specific method is as follows: The first aspect of the present application proposes an embodiment, referring to Figure 1 A front view of a filling device is shown, Figure 2 A cross-sectional view of the filling device AA is shown, and Figure 3 The filling device described in the present application comprises: A filling pipe 1, provided with an inlet and an outlet; The electric valve assembly 2 is arranged in the lumen of the filling pipe 1 and is located between the inlet and the outlet. The electric valve assembly 2 connects the outlet and the inlet when powered on, and blocks the outlet and the inlet when powered off. A first sensing module 4 is disposed in the lumen between the outlet and the inlet, and is used to detect whether the fluid material flowing in from the inlet has conductivity; The control module 3 is connected to the electric valve assembly 2 and the first sensing module 4 respectively. The control module 3 is used to control the electric valve assembly 2 to connect the outlet and the inlet when the fluid material is conductive, and to control the electric valve assembly 2 to block the outlet and the inlet when the fluid material is not conductive.

[0030] The inlet of the filling pipe 1 is used to connect with the filling gun to allow the liquid flowing out of the filling gun to further flow into the inlet. The outlet of the filling pipe 1 is used to connect with the liquid storage tank so that the liquid flowing out of the outlet is collected and stored in the liquid storage tank.

[0031] In an optional embodiment, the filling device of the present application can be applied to a urea system of a vehicle. The filling pipe 1 can be a urea filling pipe 1 of a urea system, and the urea tank is connected to the outlet of the urea filling pipe 1 .

[0032] In an optional embodiment, the filling pipe 1 and the liquid storage tank may be of an integrated design or a split design.

[0033] The electric valve assembly 2 is arranged in the lumen of the filling pipe 1 and is located between the inlet and the outlet. The electric valve assembly 2 has an open state and a closed state. In the open state, the electric valve assembly 2 connects the outlet and the inlet, allowing the fluid material to flow through the lumen where the electric valve assembly 2 is located. In the closed state, the electric valve assembly 2 blocks the outlet and the inlet, preventing the fluid material from flowing through the lumen where the electric valve assembly 2 is located.

[0034] In an optional embodiment, the electric valve assembly 2 can be a ball valve, a gate valve or a butterfly valve. When the type of the electric valve assembly 2 is different, the way in which the electric valve assembly 2 is arranged in the tube cavity is also different. Taking the electric valve assembly 2 of the butterfly valve type as an example, the electric valve assembly 2 at least includes a butterfly plate and a valve stem connected to the butterfly plate, the valve stem is rotatably connected to the valve seat, and the valve seat is connected to the pipe wall of the filling pipe 1. The position of the butterfly plate can be changed by rotating the valve stem, thereby controlling the valve to be in an open state or a closed state.

[0035] In an optional embodiment, the electric valve assembly 2 may include a valve, a drive motor and a return module respectively connected to the valve, and the drive motor is connected to the control module 3. When the control module 3 controls the drive motor to be in a powered-on state, the drive motor drives the valve to move and connect the outlet and the inlet of the filling pipe 1; when the control module 3 controls the drive motor to be in a powered-off state, the valve loses the kinetic energy from the drive motor and blocks the outlet and the inlet of the filling pipe 1 under the drive of the return module.

[0036] When the user fills diesel into the lumen of the filling pipe 1 from the inlet of the filling pipe 1, the diesel flows from the inlet to the position of the first sensing module 4. At this time, since diesel is an insulating material and has no conductivity, when the first sensing module 4 detects that the fluid material has no conductivity, the control module 3 controls the electric valve assembly 2 to block the outlet and the inlet, and the diesel cannot break through the electric valve assembly 2 and continue to flow to the outlet of the filling pipe 1.

[0037] When the user fills the urea solution into the lumen of the filling pipe 1 from the inlet of the filling pipe 1, the urea solution flows from the inlet to the position of the first sensing module 4. At this time, since the urea solution is a conductive material and has conductivity, when the first sensing module 4 detects that the fluid material has conductivity, the control module 3 controls the electric valve assembly 2 to connect the outlet with the inlet, and the urea solution can also flow further to the outlet of the filling pipe 1 through the electric valve assembly 2.

[0038] In an optional embodiment, when the filling pipe 1 is connected to the urea tank, the filling device may further include an exhaust pipe connected to the urea tank, and the interior of the urea tank is connected to the atmosphere through the exhaust pipe. When the user fills urea into the urea tank through the filling pipe 1, in order to ensure that urea can flow smoothly into the urea tank, excess air in the urea tank can be discharged through the exhaust pipe, thereby balancing the atmospheric pressure inside and outside the urea tank.

[0039] In an optional embodiment, a sheath may be further provided on the outside of the filling pipe 1 , and the sheath fits against the wall of the filling pipe 1 , thereby preventing metal protrusions on the vehicle from abrading the wall of the filling pipe.

[0040] In an optional embodiment, when the length of the filling pipe 1 is greater than a preset length, the filling device may further include a fixing bracket for fixing the filling pipe 1 on the vehicle.

[0041] The filling device in this embodiment includes a filling pipe 1, an electric valve assembly 2, a control module 3 and a first sensing module 4. When the fluid material flows from the inlet of the filling pipe 1 to the first sensing module 4, if the first sensing module 4 detects that the fluid material has conductivity, the control module 3 controls the electric valve assembly 2 to connect the outlet and the inlet of the filling pipe 1, so that the fluid material flowing in from the inlet can further flow to the outlet.

[0042] If the first sensing module 4 detects that the fluid material has no conductivity, the control module 3 controls the electric valve assembly 2 to block the outlet and the inlet of the filling pipe 1 to prevent the fluid material flowing in from the inlet from further flowing to the outlet.

[0043] Since diesel is not conductive but urea is conductive, when the user fills diesel into the urea tank through the inlet, the diesel cannot flow further into the urea tank, while when the user fills urea, the urea can flow into the urea tank normally. Therefore, the filling device of this embodiment can avoid the accidental addition of diesel while realizing the normal urea filling function, thereby preventing diesel from contaminating the urea in the urea tank or damaging the urea pump.

[0044] Optionally, refer to Figure 4 The first sensing module 4 includes: a sensing circuit 41 and a receiving chamber 42, the receiving chamber 42 is located in the tube cavity between the outlet and the inlet, and the receiving chamber 42 is used to receive the fluid material flowing in from the inlet; The induction circuit 41 includes a battery 411, a first wire 412, and a second wire 413. One end of the first wire 412 is connected to the battery 411 and the other end is exposed in the accommodation cavity 42. One end of the second wire 413 is connected to the battery 411 and the other end is exposed in the accommodation cavity 42. The first sensing module 4 also includes: The first detection unit 43 is connected to the sensing circuit 41 and the control module 3 respectively. The first detection unit 43 is used to determine that the fluid material has conductivity when the fluid material is connected to the sensing circuit 41, and to determine that the fluid material has no conductivity when the fluid material is disconnected from the sensing circuit 41.

[0045] The accommodating chamber 42 is a cavity that can accommodate fluid material. When the fluid material flows in from the inlet of the filling pipe, the fluid material flows into the accommodating chamber 42 along the channel connecting the accommodating chamber 42 and the inlet, and then contacts the ends of the first wire 412 and the second wire 413 exposed in the accommodating chamber 42 respectively.

[0046] When the fluid material in the accommodating cavity 42 is conductive, the ends of the first wire 412 and the second wire 413 are respectively exposed in the accommodating cavity 42, and are connected through the fluid material, thereby generating current in the sensing circuit 41. When the first detection unit 43 detects that there is current in the sensing circuit 41, it can be determined that the fluid material has connected the sensing circuit 41, and further determines that the fluid material is conductive.

[0047] When the fluid material in the accommodating cavity 42 is not conductive, the ends of the first wire 412 and the second wire 413 respectively exposed in the accommodating cavity 42 cannot be connected through the fluid material, and there is no current in the sensing circuit 41. When the first detection unit 43 does not detect the existence of current in the sensing circuit 41, it can be determined that the fluid material disconnects the sensing circuit 41, and further determines that the fluid material is not conductive.

[0048] In an optional implementation, in order to prevent the sensing circuit 41 from being short-circuited when the fluid material is conductive, a load may be provided in the sensing circuit 41 , and the load may be connected between the battery 411 and the first wire 412 .

[0049] In an optional implementation, the first detection unit 43 may include an ammeter, and the first detection unit 43 detects whether there is current in the sensing circuit 41 through the ammeter.

[0050] In an optional embodiment, the accommodating chamber 42 may be a cavity surrounded by a shell outside the filling pipe, or may be a cavity surrounded by a part of the wall of the filling pipe.

[0051] In an optional implementation, the first wire 412 and the second wire 413 may be metal wires.

[0052] In an optional embodiment, the battery 411 may be a 12V low-voltage battery 411 of a vehicle.

[0053] In an optional embodiment, a metal probe may be provided at one end of the first wire 412 and the second wire 413 exposed in the accommodating cavity 42. When the accommodating cavity 42 contains a conductive substance, the power supply circuit is connected through the metal probe provided on the first wire 412 and the metal probe provided on the second wire 413.

[0054] The first sensing unit described in this embodiment can determine whether the fluid material is conductive by detecting whether the fluid material can conduct the sensing circuit 41, thereby simplifying the structure of the first sensing unit, so that the present application can detect the conductivity of the fluid material in a simple manner, thereby reducing the production cost of the diesel filling device.

[0055] Optionally, refer to Figures 1 to 3 The accommodating chamber 42 is located on a side of the electric valve assembly 2 close to the inlet, and the surface of the electric valve assembly 2 and the wall of the filling pipe 1 together form the accommodating chamber 42 .

[0056] In order to save the space required for setting the accommodating chamber 42, the accommodating chamber 42 can be directly set in the tube cavity of the filling pipe 1. Specifically, the accommodating chamber 42 is placed on the side of the electric valve assembly 2 close to the inlet, and the surface of the electric valve assembly 2 and the tube wall of the filling pipe 1 are combined to form the accommodating chamber 42. The size of the accommodating chamber 42 is determined by the position of the electric valve assembly 2. The closer the electric valve assembly 2 is to the inlet of the filling pipe 1, the smaller the volume of the accommodating chamber 42; the farther the electric valve assembly 2 is from the inlet of the filling pipe 1, the larger the volume of the accommodating chamber 42.

[0057] In this embodiment, the accommodating chamber 42 is arranged on the side of the electric valve assembly 2 close to the inlet, and the accommodating chamber 42 is enclosed by the surface of the electric valve assembly 2 and the tube wall of the filling pipe 1, thereby avoiding the additional arrangement of the cavity wall of the accommodating chamber 42, and reducing the manufacturing cost of the filling device. At the same time, the accommodating chamber 42 is directly placed on the side of the electric valve assembly 2 close to the inlet, and the distance between the inlet of the filling pipe 1 and the accommodating chamber 42 is also shortened, so that the fluid material flowing into the inlet can reach the accommodating chamber 42 more quickly, thereby accelerating the reaction speed of the electric valve assembly 2.

[0058] Optionally, referring to the structural schematic diagram of a filling device provided with a throat assembly shown in FIG5 , the filling device further includes a throat assembly 5 , the throat assembly 5 includes a throat 51 connected to the inlet and a cover plate 52 movably connected to the throat 51 ; The cover plate 52 is connected to the first sensing module 4 . The first sensing module 4 is used to detect whether the fluid material flowing in from the inlet is conductive when the cover plate 52 moves in a direction away from the throat 51 . The throat 51 is also called an interface, which is arranged at the entrance of the filling pipe 1 to facilitate the connection between the filling gun and the entrance of the filling pipe 1. The cover plate 52 is movably connected to the throat 51, and can cover the opening of the throat or expose the opening of the throat 51. When the cover plate 52 moves to a position to expose the opening of the throat 51, it indicates that the user has the need to add liquid to the filling pipe 1; when the cover plate 52 moves to a position to cover the opening of the throat 51, it indicates that the user has no need to add liquid to the filling pipe 1.

[0059] The cover plate 52 is connected to the first sensing module 4. The first sensing module 4 may include a position sensor and a sensing unit connected to the position sensor. The position sensor is used to detect the current position of the cover plate 52. The sensing unit is used to receive the position information detected by the position sensor, and then determine whether the cover plate 52 is moving away from the throat 51 according to the position information of the cover plate 52, and when the cover plate 52 moves away from the throat 51, detect whether the fluid material flowing in from the inlet is conductive.

[0060] When the sensing unit in the first sensing module 4 determines that the cover 52 is moving away from the throat 51 based on the position information detected by the position sensor, it indicates that the cover 52 is about to expose the opening of the throat 51. At this time, it can be considered that the user has the need to add liquid to the filling pipe 1, and it is predicted that fluid material will flow to the sensing unit, and then the conductivity of the fluid material will be detected.

[0061] When the sensing unit in the first sensing module 4 determines that the cover 52 has not moved away from the throat 51 based on the position information detected by the position sensor, it indicates that the cover 52 is still in the position covering the opening of the throat 51. At this time, it is considered that the user has no need to add liquid to the filling pipe 1, and the detection of the conductivity of the fluid material can be stopped.

[0062] This embodiment determines whether the user has a need for refilling by the movement direction of the cover plate 52 relative to the throat 51, and then starts the detection of the conductivity of the fluid material only when the user has a need for refilling, thereby reducing the energy consumed by the first sensing module 4 and improving the greenness of the refilling device.

[0063] Optionally, refer to Figures 1 to 3 The electric valve assembly 2 includes a coil 21, a first magnet 22, a spring 23 and a valve 24. The valve 24 is arranged in the tube cavity of the filling pipe 1. The coil 21 is connected to the tube wall of the filling pipe 1, the first magnet 22 is connected to the valve 24, and one end of the spring 23 is connected to the tube wall and the other end is connected to the valve 24. The control module 3 is connected to the coil 21. The control module 3 is specifically used to control the coil 21 to be energized when the fluid material is conductive, so that the magnetic field generated by the coil 21 drives the first magnet 22 to drive the valve 24 to connect the outlet and the inlet, and to control the coil 21 to be de-energized when the fluid material is not conductive, so that the spring 23 drives the valve 24 to block the outlet and the inlet.

[0064] The coil 21 can be connected to the wall of the filling pipe 1 through a winding column provided on the wall, and the coil 21 is wound around the winding column of the wall. The first magnet 22 and the valve 24 can be connected by an interlocking manner. For example, an interlocking groove that is adapted to the shape of the first magnet 22 can be provided on the valve 24, and the first magnet 22 is connected to the valve 24 by embedding the first magnet 22 in the interlocking groove.

[0065] The spring 23 can be a coil spring or a leaf spring. Taking the coil spring as an example, the connection method of the spring 23 is illustrated. One end and the other end of the spring 23 can be connected to the pipe wall and the valve 24 respectively by bonding or welding.

[0066] Based on the Ampere circuital theorem, when the coil 21 is in the energized state, a magnetic field will be generated around the coil 21. At this time, the magnetic field generated by the coil 21 will generate a magnetic force on the first magnet 22, and then the first magnet 22, driven by the magnetic force, drives the valve 24 to start moving, so that the outlet and the inlet of the filling pipe 1 are connected. Since the valve 24 is also connected to the spring 23, the spring 23 will also produce elastic deformation during the movement of the valve 24. When the coil 21 is switched from the energized state to the de-energized state, the magnetic force of the coil 21 on the first magnet 22 disappears, and the elastic potential energy stored in the spring 23 due to the elastic deformation is released, so that the valve 24, driven by the elastic potential energy, blocks the outlet and the inlet of the filling pipe 1.

[0067] This embodiment uses the first magnet 22, the coil 21 and the spring 23 to achieve communication and blocking between the outlet and the inlet of the filling pipe 1 when the electric valve assembly 2 is in the power-on state and the power-off state, thereby simplifying the structure of the filling device.

[0068] Optionally, the filling device further comprises a second sensing module 6 connected to the control module 3, and the second sensing module 6 is used to determine whether the filling gun is a target filling gun when the filling gun is inserted into the inlet; The control module 3 is also used to control the electric valve assembly 2 to connect the outlet and the inlet when the filling gun is a target filling gun or the fluid material is conductive, and to control the electric valve assembly 2 to disconnect the outlet and the inlet when the filling gun is not a target filling gun and the fluid material is not conductive.

[0069] In order to improve the filling efficiency of the filling device, the electric valve assembly 2 can be controlled to connect or disconnect the outlet and the inlet of the filling pipe by detecting whether the filling gun is a target filling gun.

[0070] When the target filling gun is inserted into the inlet, it indicates that the fluid material to be flowed into the filling pipe 1 is the fluid material adapted to the liquid storage tank, and thus the electric valve assembly 2 can be controlled to connect the outlet and the inlet.

[0071] In the case where it is detected that the filling gun is not the target filling gun, it indicates that the fluid material about to flow into the filling pipe 1 may not be the fluid material adapted to the liquid storage tank. At this time, if the first sensing module 4 detects that the fluid material has conductivity, the electric valve assembly 2 can still be controlled to connect the outlet and the inlet; if the first sensing module 4 detects that the fluid material has no conductivity, the electric valve assembly 2 should be controlled to disconnect the outlet and the inlet.

[0072] The second sensing module 6 of this embodiment can enable the filling device to quickly connect the outlet and the inlet of the filling pipe 1 when the target filling gun is detected to be inserted, thereby accelerating the response speed of the filling device and improving the filling efficiency of the user.

[0073] Optionally, refer to Figure 6 A schematic diagram of the structure of a second sensing module is shown. When the material of the target filling gun is metal, the second sensing module 6 includes a second magnet 61 distributed along the caliber of the entrance, and a second detection unit 62 connected to the second magnet 61, and the second detection unit 62 is connected to the control module 3; The second detection unit 62 is used to determine that the filling gun is a target filling gun when the second magnet 61 generates current, and to determine that the filling gun is not a target filling gun when the second magnet 61 does not generate current.

[0074] According to Faraday's Law, when a conductor moves relative to a magnetic field, a certain electromotive force will be induced in the conductor. Therefore, when the target filling gun is made of metal, the second sensing module 6 may include a second magnet 61 distributed along the caliber of the inlet, and a second detection unit 62 connected to the second magnet 61.

[0075] The second magnets 61 distributed along the diameter of the inlet will form a magnetic field densely covered with magnetic flux lines at the opening of the throat 51. When a target filling gun made of metal is inserted into the throat 51, the target filling gun will cut the magnetic flux lines, thereby generating current in the second magnets 61. Therefore, when the second detection unit 62 detects that the second magnet 61 generates current, it indicates that the filling gun is the target filling gun; when the second detection unit 62 does not detect that the second magnet 61 generates current, it indicates that the filling gun is not the target filling gun.

[0076] In this embodiment, when the material of the target filling gun is metal, a second magnet 61 is provided in the second sensing module 6, so as to judge whether the filling gun is the target filling gun based on the principle of electromagnetic induction, so that the second sensing module 6 can realize detection without power supply, thereby reducing the energy consumption required for detection.

[0077] Optionally, refer to Figure 2 , the electric valve assembly 2 is provided with a sealing ring 25; When the electric valve assembly 2 is disconnected from the inlet and the outlet, the sealing ring 25 is in contact with the wall of the filling pipe 1 .

[0078] The sealing ring 25 can be arranged on the valve 24 in the electric valve assembly 2, and fits with the edge of the valve 24 close to the wall of the filling pipe 1. When the electric valve assembly 2 is disconnected from the inlet and the outlet, in order to prevent the fluid material flowing in from the inlet from leaking out from the gap between the electric valve assembly 2 and the pipe wall, the sealing ring 25 can be used to enhance the sealing between the electric valve assembly 2 and the pipe wall.

[0079] In an optional implementation, the sealing ring 25 may be connected to the valve 24 in the electric valve assembly 2 by bonding.

[0080] Based on the above embodiments, reference Figures 1 to 6 , the filling device of the present application will be described exemplarily below: The filling device of the present application is applied to the urea system of a vehicle, and the specific structure includes: Filling pipe 1, electric valve assembly 2, control module 3, first sensing module 4, throat assembly 5 and second sensing module 6.

[0081] The filling pipe 1 is provided with an outlet and an inlet.

[0082] The electric valve assembly 2 includes a coil 21, a first magnet 22, a spring 23, a valve 24 and a sealing ring 25. The valve 24 is arranged in the lumen of the filling pipe 1, between the outlet and the inlet. The edge of the valve 24 is provided with a sealing ring 25, and when the valve 24 is in the closed position, the sealing ring 25 fits against the wall of the filling pipe 1. The first magnet 22 in the electric valve assembly 2 is connected to the valve 24, the coil 21 is connected to the wall of the filling pipe 1, and one end of the spring 23 is connected to the wall of the filling pipe 1 and the other end is connected to the valve 24.

[0083] When the coil 21 is energized, the magnetic field generated by the coil 21 will generate a magnetic force on the first magnet 22, so that the first magnet 22, under the push of the magnetic force, drives the valve 24 to start moving, so that the outlet and the inlet of the filling pipe 1 are connected.

[0084] When the coil 21 is powered off, the magnetic force of the coil 21 on the first magnet 22 disappears, and the elastic potential energy stored in the spring 23 due to elastic deformation is released, so that the valve 24 blocks the outlet and the inlet of the filling pipe 1 under the drive of the elastic potential energy.

[0085] The first sensing module 4 includes a sensing circuit 41, a receiving chamber 42, and a first detection unit 43. The sensing circuit 41 includes a battery 411, a first wire 412, and a second wire 413. One end of the first wire 412 is connected to the battery 411, and the other end is exposed in the receiving chamber 42; one end of the second wire 413 is connected to the battery 411, and the other end is exposed in the receiving chamber 42. The receiving chamber 42 is connected to the inlet, and is located on the side of the valve 24 close to the inlet. The surface of the valve 24 and the wall of the filling pipe 1 enclose the receiving chamber 42.

[0086] When the first detection unit 43 detects the existence of current in the sensing circuit 41 , it determines that the fluid material has conductivity; when the first detection unit 43 does not detect the existence of current in the sensing circuit 41 , it determines that the fluid material has no conductivity.

[0087] The throat assembly 5 includes a throat 51 and a cover plate 52 movably connected to the throat 51, the cover plate 52 is connected to the first detection unit 43, and the throat 51 is connected to the inlet of the filling pipe 1. The first detection unit 43 starts to detect whether the fluid material has conductivity when the cover plate 52 moves in a direction away from the throat 51, and stops detecting whether the fluid material has conductivity when the cover plate 52 moves in a direction close to the throat 51.

[0088] The second induction module 6 includes a second magnet 61 distributed along the diameter of the entrance, and a second detection unit 62 connected to the second magnet 61. In the case where the material of the target filling gun is metal, if the second magnet 61 generates current, the second detection unit 62 determines that the filling gun is the target filling gun; if the second magnet 61 does not generate current, the second detection unit 62 determines that the filling gun is not the target filling gun.

[0089] The control module 3 is connected to the coil 21 , the first detection unit 43 and the second detection unit 62 respectively.

[0090] When the filling gun is the target filling gun or the fluid material is conductive, the control module 3 controls the coil 21 to be energized to drive the first magnet 22 to drive the valve 24 to connect the outlet and the inlet; when the filling gun is not the target filling gun and the fluid material is not conductive, the control coil 21 is de-energized to allow the valve 24 to disconnect the outlet and the inlet under the drive of the spring 23.

[0091] An embodiment of the present application further provides a urea system, and the urea system includes the filling device of the present application.

[0092] An embodiment of the present application also provides a vehicle, including a urea system or a filling device provided by the present application.

[0093] The present application provides a filling device, a urea system and a vehicle, and the method includes: the filling device includes: a filling pipe 1, which is provided with an inlet and an outlet; an electric valve assembly 2, which is arranged in the tube cavity of the filling pipe 1 and is located between the inlet and the outlet; the electric valve assembly 2 is used to connect or block the outlet and the inlet; a first sensing module 4, which is arranged in the tube cavity between the outlet and the inlet, and the first sensing module 4 is used to detect whether the fluid material flowing into the inlet from the inlet has conductivity; a control module 3, which is respectively connected to the electric valve assembly 2 and the first sensing module 4, and the control module 3 is used to control the electric valve assembly 2 to connect the outlet and the inlet when the fluid material has conductivity, and to control the electric valve assembly 2 to block the outlet and the inlet when the fluid material does not have conductivity.

[0094] The filling device in the present application includes a filling pipe 1, an electric valve assembly 2, a first sensing module 4 and a control module 3. When the first sensing module 4 senses that the fluid material filled from the inlet of the filling pipe 1 is conductive, the control module 3 controls the electric valve assembly 2 to connect the outlet and the inlet of the filling pipe 1 so that the fluid material can flow further to the outlet; when the first sensing module 4 senses that the fluid material filled from the inlet of the filling pipe 1 is not conductive, the control module 3 controls the electric valve assembly 2 to block the outlet and the inlet of the filling pipe 1 to prevent the fluid material from flowing further to the outlet. Since diesel is not conductive and urea is conductive, when the user fills diesel into the urea tank through the inlet, the diesel cannot flow further to the urea tank, and when the user fills urea, the urea can flow into the urea tank normally. Therefore, the filling device of the present application can avoid the mistaken addition of diesel on the basis of realizing the normal urea filling function, thereby preventing diesel from contaminating the urea in the urea tank or damaging the urea pump.

[0095] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0096] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present application.

[0097] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0098] The above is a detailed introduction to a filling device, a urea system and a vehicle provided by the present application. Specific examples are used in this article to illustrate the principle and implementation method of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for a general technician in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A filling device, characterized in that: The filling device comprises: A filling pipe provided with an inlet and an outlet; An electric valve assembly is arranged in the lumen of the filling pipe and is located between the inlet and the outlet; the electric valve assembly is used to connect or block the outlet and the inlet; A first sensing module is disposed in the lumen between the outlet and the inlet, and is used to detect whether the fluid material flowing in from the inlet has conductivity; A control module is connected to the electric valve assembly and the first sensing module, respectively. The control module is used to control the electric valve assembly to connect the outlet and the inlet when the fluid material is conductive, and to control the electric valve assembly to block the outlet and the inlet when the fluid material is not conductive.

2. The filling device according to claim 1, characterized in that: The first sensing module comprises: a sensing circuit and a containing cavity, wherein the containing cavity is located in the lumen between the outlet and the inlet, and the containing cavity is used to contain the fluid material flowing in from the inlet; The induction circuit includes a battery, a first wire and a second wire, one end of the first wire is connected to the battery and the other end is exposed in the accommodating cavity, and one end of the second wire is connected to the battery and the other end is exposed in the accommodating cavity; The first sensing module further includes: A first detection unit connected to the sensing circuit and the control module respectively, the first detection unit is used to determine that the fluid material has conductivity when the fluid material conducts the sensing circuit; and to determine that the fluid material does not have conductivity when the fluid material disconnects the sensing circuit.

3. The filling device according to claim 2, characterized in that: The accommodating chamber is located at a side of the electric valve assembly close to the inlet, and the surface of the electric valve assembly and the pipe wall of the filling pipe together form the accommodating chamber.

4. The filling device according to claim 1, characterized in that: The filling device further comprises a throat assembly, wherein the throat assembly comprises a throat connected to the inlet and a cover plate movably connected to the throat; The cover plate is connected to the first sensing module, and the first sensing module is used to detect whether the fluid material flowing in from the inlet has conductivity when the cover plate moves in a direction away from the throat.

5. The filling device according to claim 1, characterized in that: The electric valve assembly includes a coil, a first magnet, a spring and a valve, wherein the valve is arranged in the tube cavity of the filling pipe, the coil is connected to the tube wall of the filling pipe, the first magnet is connected to the valve, one end of the spring is connected to the tube wall and the other end is connected to the valve; The control module is connected to the coil, and is specifically used to control the coil to be energized when the fluid material is conductive, so that the magnetic field generated by the coil drives the first magnet to drive the valve to connect the outlet and the inlet, and to control the coil to be de-energized when the fluid material is not conductive, so that the spring drives the valve to block the outlet and the inlet.

6. The filling device according to claim 1, characterized in that: The filling device further comprises a second sensing module connected to the control module, the second sensing module being used to determine whether the filling gun is a target filling gun when a filling gun is inserted into the inlet; The control module is also used to control the electric valve assembly to connect the outlet and the inlet when the filling gun is the target filling gun or the fluid material is conductive, and to control the electric valve assembly to disconnect the outlet and the inlet when the filling gun is not the target filling gun and the fluid material is not conductive.

7. The filling device according to claim 6, characterized in that: The target filling gun is made of metal, the second sensing module includes a second magnet distributed along the caliber of the inlet, and a second detection unit connected to the second magnet, and the second detection unit is connected to the control module; The second detection unit is used to determine that the filling gun is the target filling gun when the second magnet generates current, and to determine that the filling gun is not the target filling gun when the second magnet does not generate current.

8. The filling device according to claim 1, characterized in that: The electric valve assembly is provided with a sealing ring; When the electric valve assembly disconnects the inlet and the outlet, the sealing ring fits against the wall of the filling pipe.

9. A urea system, characterized in that: The urea system comprises the filling device according to any one of claims 1 to 8.

10. A vehicle, characterized in that: The vehicle comprises the filling device according to any one of claims 1 to 8, or comprises the urea system according to claim 9.

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