Filling device, urea system and vehicle

Abstract

The present application provides a filling device, a urea system, and a vehicle, belonging to the field of vehicle technology. The filling device includes: a filling pipe provided with an inlet and an outlet; an electric valve assembly for connecting or blocking the outlet and the inlet; a first sensing module for detecting whether the fluid material flowing from the inlet is conductive; and a control module 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. The filling device described in the application can avoid the accidental addition of diesel on the basis of achieving the normal urea filling function, thereby preventing diesel from contaminating the urea in the urea tank or damaging the urea pump.

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] With the increasing demand for cleaner exhaust, diesel-powered vehicles are using urea to reduce nitrogen oxides in exhaust before discharging them. Consequently, vehicles need to regularly replenish urea.

[0003] In related technologies, the urea filling port is adjacent to the fuel filling port, and both share the same body filling port. Therefore, when refilling diesel, users can easily add diesel to the urea tank by mistake, which can contaminate the urea solution and cause 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 accidentally added into the urea tank.

[0005] In a first aspect of an embodiment of the present application, a filling device is provided, the filling device comprising:

[0006] a filling pipe provided with an inlet and an outlet;

[0007] an electric valve assembly, disposed in the lumen of the filling pipe and located between the inlet and the outlet; the electric valve assembly is used to connect or block the outlet and the inlet;

[0008] a first sensing module, disposed in the lumen between the outlet and the inlet, the first sensing module being used to detect whether the fluid material flowing in from the inlet is conductive;

[0009] 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.

[0010] Optionally, the first sensing module includes: a sensing circuit and a receiving cavity, wherein the receiving cavity is located in the lumen between the outlet and the inlet, and is used to receive the fluid material flowing in from the inlet;

[0011] The induction circuit includes a battery, a first wire, and a second wire, wherein 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;

[0012] The first sensing module further includes:

[0013] A first detection unit is connected to the sensing circuit and the control module respectively, and the first detection unit is used to determine that the fluid material is conductive when the fluid material is conductive to the sensing circuit; and to determine that the fluid material is not conductive when the fluid material is disconnected from the sensing circuit.

[0014] 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, which simplifies the structure of the first sensing unit, allowing the present application to realize the detection of the conductivity of the fluid material in a simple manner, thereby reducing the production and manufacturing cost of the diesel filling device.

[0015] Optionally, the accommodating cavity is located on a side of the electric valve assembly close to the inlet, and the surface of the electric valve assembly and the wall of the filling pipe together form the accommodating cavity.

[0016] This embodiment locates the accommodating chamber on the side of the electric valve assembly near the inlet. The accommodating chamber is enclosed by the surface of the electric valve assembly and the wall of the filling pipe, thus eliminating the need for additional accommodating chamber walls and reducing the manufacturing cost of the filling device. Furthermore, placing the accommodating chamber directly on the side of the electric valve assembly near the inlet shortens the distance between the filling pipe inlet and the accommodating chamber, allowing fluid entering the inlet to reach the accommodating chamber more quickly, thereby accelerating the response of the electric valve assembly.

[0017] 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;

[0018] The cover plate is connected to the first sensing module, and the first sensing module is used to detect whether the fluid material flowing into the inlet is conductive when the cover plate moves in a direction away from the throat.

[0019] 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.

[0020] Optionally, the electric valve assembly includes a coil, a first magnet, a spring, and a valve, wherein the valve is disposed in a lumen of the filling pipe, the coil is connected to a wall of the filling pipe, the first magnet is connected to the valve, and one end of the spring is connected to the pipe wall and the other end is connected to the valve;

[0021] 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.

[0022] 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 energized state and the de-energized state, thereby simplifying the structure of the filling device.

[0023] Optionally, the filling device further comprises a second sensing module connected to the control module, the second sensing module being configured to determine whether the filling gun is a target filling gun when a filling gun is inserted into the inlet;

[0024] The control module is further configured 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 substance 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 substance is not conductive.

[0025] The second sensing module of this embodiment can enable the filling device to quickly connect the outlet and inlet of the filling pipe when detecting the insertion of the target filling gun, thereby accelerating the response speed of the filling device and improving the user's filling efficiency.

[0026] 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;

[0027] 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 determine 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.

[0028] Optionally, the electric valve assembly is provided with a sealing ring;

[0029] When the electric valve assembly disconnects the inlet and the outlet, the sealing ring fits against the wall of the filling pipe.

[0030] The sealing ring in this embodiment can enhance the sealing between the electric valve assembly and the pipe wall when the inlet and 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.

[0031] A second aspect of the embodiments of the present application provides a urea system, which includes the filling device described in the first aspect of the embodiments of the present application.

[0032] A third aspect of the embodiments of the present application provides a vehicle, comprising the urea system according to 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.

[0033] The present application provides a filling device, a urea system and a vehicle, and the method includes: the filling device includes: a filling pipe, provided with an inlet and an outlet; an electric valve assembly, arranged in a tube cavity of the filling pipe and 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, arranged in the tube cavity between the outlet and the inlet, the first sensing module is used to detect whether the fluid material flowing into the inlet from the inlet has conductivity; a control module, 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 has conductivity, and to control the electric valve assembly to block the outlet and the inlet when the fluid material has no conductivity.

[0034] 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 added from the filling pipe inlet is conductive, the control module controls the electric valve assembly to connect the outlet and 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 filling pipe inlet is not conductive, the control module controls the electric valve assembly to block the outlet and 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 to the urea tank through the inlet, the diesel cannot flow further to the urea tank, while 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 while achieving 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

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments of the present application. 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 any creative work.

[0036] Figure 1 is a front view of a filling device provided in an embodiment of the present application;

[0037] Figure 2 is a cross-sectional view of the filling device at AA provided in an embodiment of the present application;

[0038] Figure 3 is a cross-sectional view of the filling device at position BB provided in an embodiment of the present application;

[0039] Figure 4 This is a schematic structural diagram of a first sensing module provided in an embodiment of the present application;

[0040] Figure 5 This is a schematic structural diagram of a filling device provided with a throat assembly according to an embodiment of the present application;

[0041] Figure 6 Schematic diagram of the structure of a second sensing module provided in an embodiment of the present application.

[0042] Description of labels:

[0043] 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, 6-Second sensing module, 61-Second magnet, 62-Second detection unit. DETAILED DESCRIPTION

[0044] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0045] With the increasing demand for cleaner exhaust, diesel-powered vehicles are using urea to reduce nitrogen oxides in exhaust before discharging them. Consequently, vehicles need to regularly replenish urea.

[0046] In related technologies, the urea filling port is adjacent to the fuel filling port, and both share the same body filling port. Therefore, when refilling diesel, users can easily add diesel to the urea tank by mistake, which can contaminate the urea solution and cause irreversible damage to components such as the urea pump.

[0047] Based on this, in order to solve the problem of how to prevent diesel from being accidentally added to the urea tank, the present application provides a filling device, a urea system, and a vehicle, including a filling device comprising 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 filling pipe inlet is conductive, the control module controls the electric valve assembly to connect the outlet and 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 filling pipe inlet is not conductive, the control module controls the electric valve assembly to block the outlet and 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 to the urea tank through the inlet, the diesel cannot flow further to the urea tank, while 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 while achieving 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:

[0048] The first aspect of this 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 this application comprises:

[0049] A filling pipe 1 is provided with an inlet and an outlet;

[0050] 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.

[0051] A first sensing module 4 is provided in the lumen between the outlet and the inlet, and is used to detect whether the fluid material flowing in from the inlet is conductive;

[0052] 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.

[0053] 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 to collect and store the liquid flowing out of the outlet in the liquid storage tank.

[0054] 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 specifically be a urea filling pipe 1 of the urea system, and the urea tank is connected to the outlet of the urea filling pipe 1.

[0055] In an optional embodiment, the filling pipe 1 and the liquid storage tank can be of an integrated design or a split design.

[0056] The electric valve assembly 2 is disposed within the lumen of the filling pipe 1, between the inlet and 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 inlet and outlet, allowing fluid to flow through the lumen where the electric valve assembly 2 is located. In the closed state, the electric valve assembly 2 blocks the inlet and outlet, preventing fluid from flowing through the lumen where the electric valve assembly 2 is located.

[0057] In an optional embodiment, the electric valve assembly 2 can specifically be a ball valve, a gate valve, or a butterfly valve. Depending on the type of electric valve assembly 2, the manner in which the electric valve assembly 2 is positioned within the lumen also varies. For example, a butterfly valve-type electric valve assembly 2 includes at least a butterfly plate and a valve stem connected to the butterfly plate. The valve stem is rotatably connected to a valve seat, which is connected to the wall of the filling pipe 1. The position of the butterfly plate can be changed by rotating the valve stem, thereby controlling whether the valve is open or closed.

[0058] In an optional embodiment, the electric valve assembly 2 may include a valve, a drive motor, and a return module, each connected to the valve. The drive motor is connected to the control module 3. When the control module 3 controls the drive motor to be in an energized state, the drive motor drives the valve to move, thereby connecting the outlet and inlet of the filling pipe 1. When the control module 3 controls the drive motor to be in an energized state, the valve loses the kinetic energy from the drive motor and, driven by the return module, blocks the outlet and inlet of the filling pipe 1.

[0059] When a user fills the lumen of filling pipe 1 from the inlet, diesel flows from the inlet toward the location of first sensing module 4. Since diesel is an insulating material and does not conduct electricity, when first sensing module 4 detects that the fluid is not conductive, control module 3 controls electric valve assembly 2 to block the outlet from the inlet. This prevents diesel from flowing through electric valve assembly 2 and continuing toward the outlet of filling pipe 1.

[0060] When a user adds urea solution into the lumen of the filling pipe 1 from the inlet, the urea solution flows from the inlet toward the location of the first sensing module 4. Since the urea solution is a conductive substance, when the first sensing module 4 detects that the fluid is conductive, the control module 3 controls the electric valve assembly 2 to connect the outlet with the inlet, allowing the urea solution to flow further toward the outlet of the filling pipe 1 through the electric valve assembly 2.

[0061] 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, to ensure that the 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.

[0062] 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.

[0063] 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.

[0064] 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 fluid 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 is conductive, the control module 3 controls the electric valve assembly 2 to connect the outlet and inlet of the filling pipe 1, so that the fluid flowing from the inlet can further flow to the outlet.

[0065] 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 from the inlet from flowing further to the outlet.

[0066] Because diesel is non-conductive, while urea is, when a user adds diesel to the urea tank through the inlet, the diesel cannot flow further into the urea tank. However, when the user adds urea, the urea can flow normally into the tank. Therefore, the filling device of this embodiment can prevent the accidental addition of diesel while still performing normal urea filling functions, thereby preventing diesel from contaminating the urea in the urea tank or damaging the urea pump.

[0067] Optionally, refer to Figure 4 The first sensing module 4 includes: a sensing circuit 41 and a receiving cavity 42, the receiving cavity 42 is located in the lumen between the outlet and the inlet, and is used to receive the fluid material flowing in from the inlet;

[0068] 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 accommodating cavity 42. One end of the second wire 413 is connected to the battery 411 and the other end is exposed in the accommodating cavity 42.

[0069] The first sensing module 4 further includes:

[0070] 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 is conductive when the fluid material is connected to the sensing circuit 41, and to determine that the fluid material is not conductive when the fluid material is disconnected from the sensing circuit 41.

[0071] The accommodating chamber 42 is a hollow cavity that can accommodate fluid. When the fluid flows into the filling pipe from the inlet, the fluid 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.

[0072] When the fluid in the accommodating cavity 42 is conductive, the ends of the first conductive wire 412 and the second conductive wire 413, respectively exposed in the accommodating cavity 42, are connected through the fluid, thereby generating a current in the sensing circuit 41. When the first detection unit 43 detects the presence of current in the sensing circuit 41, it determines that the fluid has connected the sensing circuit 41 and, therefore, that the fluid is conductive.

[0073] When the fluid in the accommodating chamber 42 is non-conductive, the ends of the first conductive wire 412 and the second conductive wire 413 exposed in the accommodating chamber 42 cannot be connected by the fluid, and no current flows in the sensing circuit 41. If the first detection unit 43 does not detect the presence of current in the sensing circuit 41, it can be determined that the fluid has disconnected the sensing circuit 41 and, therefore, that the fluid is non-conductive.

[0074] In an optional embodiment, 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 .

[0075] 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.

[0076] In an optional embodiment, the accommodating chamber 42 may be a cavity enclosed by the shell outside the filling pipe, or may be a cavity enclosed by a portion of the wall of the filling pipe.

[0077] In an optional implementation, the first conductive wire 412 and the second conductive wire 413 may be metal conductive wires.

[0078] In an optional embodiment, the battery 411 may be a 12V low-voltage battery 411 of a vehicle.

[0079] In an optional embodiment, metal probes may be provided at the ends of the first and second wires 412, 413 exposed in the accommodating cavity 42. When a conductive material is contained in the accommodating cavity 42, the power supply circuit is connected via the metal probes provided on the first and second wires 412, 413.

[0080] 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, which simplifies the structure of the first sensing unit, so that the present application can realize the detection of the conductivity of the fluid material in a simple manner, thereby reducing the production and manufacturing cost of the diesel filling device.

[0081] 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 .

[0082] To save space for accommodating chamber 42, it can be positioned directly within the lumen of filling pipe 1. Specifically, accommodating chamber 42 is placed on the side of electric valve assembly 2 near the inlet, with the surface of electric valve assembly 2 and the wall of filling pipe 1 forming accommodating chamber 42. The volume of accommodating chamber 42 is determined by the position of electric valve assembly 2. The closer the electric valve assembly 2 is to the inlet of filling pipe 1, the smaller the volume of accommodating chamber 42; the farther the electric valve assembly 2 is from the inlet of filling pipe 1, the larger the volume of accommodating chamber 42.

[0083] In this embodiment, the accommodating chamber 42 is positioned on the side of the electric valve assembly 2 near the inlet. The surface of the electric valve assembly 2 and the wall of the filling pipe 1 enclose the accommodating chamber 42, thereby eliminating the need for additional wall construction for the accommodating chamber 42 and reducing the manufacturing cost of the filling device. Furthermore, placing the accommodating chamber 42 directly on the side of the electric valve assembly 2 near the inlet shortens the distance between the inlet of the filling pipe 1 and the accommodating chamber 42, allowing fluid entering the inlet to reach the accommodating chamber 42 more quickly, thereby accelerating the response of the electric valve assembly 2.

[0084] Alternatively, referring to FIG5 , a schematic structural diagram of a filling device provided with a throat assembly is shown, wherein the filling device further includes a throat assembly 5 , the throat assembly 5 including a throat 51 connected to the inlet and a cover plate 52 movably connected to the throat 51 ;

[0085] 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 away from the throat 51 .

[0086] The throat opening 51, also known as the interface, is located at the entrance of the filling pipe 1 and facilitates connection of the filling gun to the inlet of the filling pipe 1. A cover plate 52 is movably connected to the throat opening 51, capable of covering the throat opening or exposing the throat opening 51. When the cover plate 52 is moved to a position exposing the throat opening 51, it indicates that the user has requested to fill liquid into the filling pipe 1; when the cover plate 52 is moved to a position covering the throat opening 51, it indicates that the user has requested to fill liquid into the filling pipe 1.

[0087] 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, based on the position information, determine whether the cover plate 52 is moving away from the throat 51. If the cover plate 52 is moving away from the throat 51, it is also used to detect whether the fluid material flowing into the inlet is conductive.

[0088] 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 then it is predicted that fluid material will flow to the sensing unit, and then the conductivity of the fluid material is detected.

[0089] 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 a 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.

[0090] 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 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 4 and improving the greenness of the refilling device.

[0091] 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 lumen of the filling pipe 1. The coil 21 is connected to the 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 pipe wall and the other end is connected to the valve 24.

[0092] 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.

[0093] The coil 21 can be connected to the wall of the filling pipe 1 via a winding post provided on the wall, with the coil 21 wound around the winding post. The first magnet 22 can be connected to the valve 24 by means of a fitting mechanism. For example, the valve 24 can be provided with a fitting groove that is shaped appropriately for the first magnet 22. The first magnet 22 can be fitted into the fitting groove to connect the first magnet 22 to the valve 24.

[0094] 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.

[0095] Based on Ampere's circuit theorem, when coil 21 is energized, a magnetic field is generated around it. This magnetic field exerts a magnetic force on first magnet 22, which in turn drives valve 24 to move, connecting the inlet and outlet of filling pipe 1. Because valve 24 is also connected to spring 23, spring 23 undergoes elastic deformation during its movement. When coil 21 switches from energized to deenergized, the magnetic force exerted on first magnet 22 by coil 21 disappears, releasing the elastic potential energy stored in spring 23 due to its elastic deformation. This elastic potential energy then drives valve 24 to block the inlet and outlet of filling pipe 1.

[0096] 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 energized state and the de-energized state, thereby simplifying the structure of the filling device.

[0097] Optionally, the filling device further includes 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;

[0098] 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 the 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 the target filling gun and the fluid material is not conductive.

[0099] 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 the target filling gun.

[0100] When the target filling gun is inserted into the inlet, it indicates that the fluid material about to flow 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.

[0101] If the filling gun is not the intended filling gun, the fluid entering the filling pipe 1 may not be compatible with the liquid storage tank. In this case, if the first sensing module 4 detects that the fluid is conductive, 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 is not conductive, the electric valve assembly 2 should be controlled to disconnect the outlet and the inlet.

[0102] The second sensing module 6 of this embodiment can enable the filling device to quickly connect the outlet and inlet of the filling pipe 1 when detecting the insertion of the target filling gun, thereby accelerating the response speed of the filling device and improving the user's filling efficiency.

[0103] Optionally, refer to Figure 6 A schematic diagram of the structure of a second sensing module is shown. When the target filling gun is made of metal, the second sensing module 6 includes a second magnet 61 distributed along the diameter of the inlet, and a second detection unit 62 connected to the second magnet 61. The second detection unit 62 is connected to the control module 3.

[0104] The second detection unit 62 is configured 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.

[0105] According to Faraday's Law, when a conductor moves relative to a magnetic field, a certain electromotive force is induced in the conductor. Therefore, if the target filling gun is made of metal, the second sensing module 6 may include second magnets 61 distributed along the diameter of the inlet and a second detection unit 62 connected to the second magnets 61.

[0106] Second magnets 61, distributed along the diameter of the inlet, create a dense magnetic field at the opening of the throat 51. When a target metal filling gun is inserted into the throat 51, it cuts these magnetic lines of flux, causing the second magnets 61 to generate a current. Therefore, when the second detection unit 62 detects current flowing from the second magnets 61, it indicates that the filling gun is the target. When the second detection unit 62 does not detect current flowing from the second magnets 61, it indicates that the filling gun is not the target.

[0107] 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 determine 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.

[0108] Optionally, refer to Figure 2 , the electric valve assembly 2 is provided with a sealing ring 25;

[0109] 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 .

[0110] A sealing ring 25 can be mounted on the valve 24 of the electric valve assembly 2, and fits against the edge of the valve 24 near the wall of the filling pipe 1. When the inlet and outlet of the electric valve assembly 2 are disconnected, the sealing ring 25 can be used to enhance the seal between the electric valve assembly 2 and the pipe wall to prevent fluid flowing in through the inlet from leaking out through the gap between the electric valve assembly 2 and the pipe wall.

[0111] In an optional embodiment, the sealing ring 25 can be connected to the valve 24 in the electric valve assembly 2 by bonding.

[0112] Based on the above embodiment, reference Figures 1 to 6 The following is an exemplary description of the filling device of this application:

[0113] The filling device of the present application is applied to the urea system of a vehicle, and its specific structure includes:

[0114] Filling pipe 1, electric valve assembly 2, control module 3, first sensing module 4, throat assembly 5 and second sensing module 6.

[0115] The filling pipe 1 is provided with an outlet and an inlet.

[0116] The electric valve assembly 2 includes a coil 21, a first magnet 22, a spring 23, a valve 24, and a sealing ring 25. Valve 24 is located within the lumen of the filling pipe 1, between the outlet and inlet. A sealing ring 25 is provided around the edge of valve 24. When valve 24 is closed, sealing ring 25 adheres to the wall of the filling pipe 1. The first magnet 22 in the electric valve assembly 2 is connected to 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 valve 24.

[0117] When the coil 21 is energized, the magnetic field generated by the coil 21 generates a magnetic force on the first magnet 22 , which in turn drives the valve 24 to start moving under the push of the magnetic force, so that the outlet and inlet of the filling pipe 1 are connected.

[0118] When the coil 21 is de-energized, the magnetic force exerted by 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, thereby driving the valve 24 to block the outlet and inlet of the filling pipe 1 under the drive of the elastic potential energy.

[0119] 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 within the receiving chamber 42. The second wire 413 also has one end connected to the battery 411, and the other end is exposed within the receiving chamber 42. The receiving chamber 42 is connected to the inlet and is located on the side of the valve 24 near the inlet. The surface of the valve 24 and the wall of the filling pipe 1 together form the receiving chamber 42.

[0120] When the first detection unit 43 detects the existence of current in the sensing circuit 41 , it determines that the fluid material is conductive; when the first detection unit 43 does not detect the existence of current in the sensing circuit 41 , it determines that the fluid material is not conductive.

[0121] 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 begins to detect whether the fluid material is conductive when the cover plate 52 moves away from the throat 51, and stops detecting whether the fluid material is conductive when the cover plate 52 moves toward the throat 51.

[0122] The second sensing module 6 includes second magnets 61 distributed along the diameter of the inlet, and a second detection unit 62 connected to the second magnets 61. If the target filling gun is made of metal, if the second magnets 61 generate current, the second detection unit 62 determines that the filling gun is the target filling gun; if the second magnets 61 do not generate current, the second detection unit 62 determines that the filling gun is not the target filling gun.

[0123] The control module 3 is connected to the coil 21 , the first detection unit 43 , and the second detection unit 62 respectively.

[0124] 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 enable the valve 24 to disconnect the outlet and the inlet under the drive of the spring 23.

[0125] An embodiment of the present application further provides a urea system, which includes the filling device of the present application.

[0126] An embodiment of the present application also provides a vehicle, comprising a urea system or filling device provided by the present application.

[0127] 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 is conductive; 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 is conductive, and to control the electric valve assembly 2 to block the outlet and the inlet when the fluid material is not conductive.

[0128] The filling device in this 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 being added 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 inlet of the filling pipe 1, allowing the fluid material to flow further toward the outlet. When the first sensing module 4 senses that the fluid material being added 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 inlet of the filling pipe 1 to prevent the fluid material from flowing further toward the outlet. Because diesel is not conductive, while urea is conductive, when a user adds diesel to the urea tank through the inlet, the diesel cannot flow further toward the urea tank. However, when a user adds urea, the urea can flow into the urea tank normally. Therefore, the filling device in this application can prevent the accidental addition of diesel while achieving normal urea filling functions, thereby preventing diesel from contaminating the urea in the urea tank or damaging the urea pump.

[0129] 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.

[0130] Although preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they become aware of the basic inventive concepts. 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 invention.

[0131] Finally, it should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or terminal device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or terminal device that includes the element.

[0132] 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 herein to illustrate the principles and implementation methods 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 those skilled in the art, according to the idea of ​​the present application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting 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, disposed in the lumen of the filling pipe and 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 provided in the lumen between the outlet and the inlet, and is used to detect whether the fluid material flowing from the inlet is conductive. The first sensing module includes: a sensing circuit; a control module, connected to the electric valve assembly and the first sensing module, respectively, and configured 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; The first sensing module further includes: a first detection unit connected to the sensing circuit and the control module respectively, the first detection unit being configured to determine that the fluid material is conductive when the fluid material is conducting the sensing circuit; and to determine that the fluid material is non-conductive when the fluid material is disconnected from the sensing circuit.

2. The filling device according to claim 1, characterized in that: The first sensing module includes: a receiving cavity, the receiving cavity being located in the lumen between the outlet and the inlet, the receiving cavity being used to receive 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. One end of the second wire is connected to the battery and the other end is exposed in the accommodating cavity.

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

4. The filling device according to claim 1, characterized in that: The filling device further includes a throat assembly, wherein the throat assembly includes 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 into the inlet is conductive 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. The valve is disposed in a lumen of the filling pipe. The coil is connected to a wall of the filling pipe, the first magnet is connected to the valve, and one end of the spring is connected to the pipe 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 includes a second sensing module connected to the control module, the second sensing module being configured to determine whether the filling gun is a target filling gun when a filling gun is inserted into the inlet; The control module is further configured 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 substance 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 substance 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 diameter 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 configured 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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