Filling assembly and vehicle with same

Abstract

The utility model discloses a filling assembly and a vehicle with the same, the filling assembly comprises a filling pipe, an air return pipe and a ventilation component, one end of the filling pipe is connected with an inlet of a urea box, and the other end of the filling pipe is provided with a filling port; one end of the air return pipe is connected to an air return port of the urea box; the ventilation assembly is arranged on the air return pipe, a ventilation opening is formed in the ventilation assembly, and a semi-permeable membrane is arranged on the inner side of the ventilation opening. According to the urea box, the ventilation assembly is arranged on the air return pipe, so that in the filling process of the urea box, redundant air in the urea box is discharged after passing through the air return pipe and the ventilation assembly, and urea overflowing from the urea box returns to the filling pipe through the throat assembly, so that the urea can be well supplemented into the urea box according to the design; moreover, the situation that urea is lost and escaped due to excessive filling can be avoided, the supplementing cost is reduced, and the structure of the filling assembly is relatively simple, so that the structural design of the filling assembly is easy to realize.

Description

Technical Field

[0001] The utility model relates to the technical field of filling pipes, in particular to a filling assembly and a vehicle with the same. Background Art

[0002] In the prior art, a urea tank is a device used to store urea solution, particularly in diesel vehicles, to reduce nitrogen oxide (NOx) emissions from vehicle exhaust. A urea pump sprays the urea solution into the engine's exhaust pipe. The urea solution reacts with the NOx in the exhaust to produce harmless nitrogen and water, thereby reducing exhaust pollution and enabling vehicle emissions to meet more stringent environmental standards, such as the National IV standard.

[0003] In the prior art, urea is consumed as the urea tank is used, necessitating a filling pipe to replenish the urea in the tank. During replenishment, the newly added urea displaces the gas inside the tank, allowing it to be discharged through the return port on the tank. However, in the existing filling process, since the return port is directly connected to the atmosphere, excessive urea replenishment can cause urea to displace the semipermeable membrane in the return port. This not only damages the membrane, impacting subsequent use of the urea tank, but also allows moisture to enter the tank through the return port when the vehicle is wading through water, impacting the tank's performance. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one objective of the present invention is to provide a filling assembly equipped with a vent assembly, which allows the filling assembly to discharge gas into the atmosphere through the vent assembly, while also preventing the escape of urea during the filling process, thereby improving filling efficiency, and preventing damage to the semipermeable membrane within the vent assembly, thereby improving the reliability of the filling assembly.

[0005] Another object of the present invention is to provide a vehicle, in which the filling assembly as shown above is installed.

[0006] According to the filling assembly of an embodiment of the present invention, the filling assembly is connected to the urea tank and includes: a filling pipe, a return air pipe and a ventilation component, one end of the filling pipe is connected to the inlet of the urea tank, and the other end of the filling pipe is provided with a filling port; one end of the return air pipe is connected to the return air port of the urea tank; the ventilation component is provided on the return air pipe, and the ventilation port is provided on the ventilation component, and a semipermeable membrane is provided on the inner side of the ventilation port.

[0007] According to the filling assembly of the embodiment of the present invention, a vent assembly is provided on the return air pipe, so that during the filling process, the excess gas in the urea tank is suitable for being discharged through the return air pipe and then through the vent assembly, and the urea overflowing from the urea tank is suitable for being returned to the filling pipe through the throat assembly, so that the urea can be better replenished into the urea tank according to the design, and the situation of excessive urea leakage can be avoided, thereby reducing the replenishment cost. At the same time, because the throat assembly is connected to the return air pipe, the urea transferred through the semipermeable membrane is suitable for being decomposed through the throat assembly and then discharged into the atmosphere, and the urea is transferred to the filling pipe for circulation replenishment. During the replenishment process, the pressure of urea on the semipermeable membrane is reduced to avoid damage to the semipermeable membrane, thereby improving the performance and service life of the semipermeable membrane, making the use reliability of the filling assembly higher, and the structure of the filling assembly is relatively simple and reliable, making the structural design of the filling assembly easy to implement.

[0008] In some embodiments, the ventilation component is a ventilation valve, a storage space is provided in the ventilation valve, one side of the storage space is connected to the return air pipe, the vent is provided at one end of the ventilation valve, and the semipermeable membrane is provided in the storage space.

[0009] In some embodiments, the vent valve includes a valve body and a vent portion, the valve body is provided with the accommodating space, the accommodating space is circumferentially provided with an air inlet, a first air outlet, and a second air outlet, the semipermeable membrane is provided on one side of the second air outlet, the vent portion is connected to the other side of the second air outlet, the vent is provided at the free end of the vent portion, and the air outlet direction of the vent portion is inclined downward

[0010] In some embodiments, a first limiting portion is provided on the outer peripheral side of the semipermeable membrane, and a second limiting portion is provided on the inner wall of the valve body, and the first limiting portion is limitedly fitted in the second limiting portion.

[0011] In some embodiments, the method further includes: a throat assembly connected to the first air outlet, and the throat assembly is arranged on the outer peripheral side of the filling port.

[0012] In some embodiments, the semipermeable membrane is made of a polymer permeable membrane.

[0013] In some embodiments, a thread is provided on the outer side of the filling port, and the thread is used to connect with the sealing cover.

[0014] In some embodiments, it also includes: a quick-connect plug, on which a first mounting seat and a second mounting seat are spaced apart, the filling pipe is connected to the first mounting seat, the first mounting seat is connected to the inlet, the return air pipe is connected to the second mounting seat, and the second mounting seat is connected to the return air port.

[0015] In some embodiments, the filling pipe includes: a first filling section, a second filling section and a first bending section, the first bending section is provided between the first filling section and the second filling section, the first filling section is connected to the inlet, and the second filling section is connected to the filling port; and / or

[0016] The return air pipe includes: a first return air section, a second return air section and a second bending section, the second bending section is arranged between the first return air section and the second return air section, the first return air section is connected to the return air port, and the second return air section is connected to the ventilation component.

[0017] A vehicle according to an embodiment of the present invention includes: the filling assembly as described above.

[0018] According to the vehicle of the embodiment of the present invention, the filling assembly as shown above is provided in the vehicle. By providing a vent assembly on the return air pipe, during the filling process of the urea tank, excess gas in the urea tank is suitable for being discharged through the return air pipe and then through the vent assembly, and urea overflowing from the urea tank is suitable for being returned to the filling pipe through the throat assembly, so that urea can be better replenished into the urea tank according to the design, and the loss and dispersion of urea due to excessive filling can be avoided, thereby reducing the replenishment cost and improving the operating performance of the vehicle. At the same time, since the throat assembly is connected to the return air pipe, the urea transferred through the semipermeable membrane is suitable for being decomposed by the throat assembly and then the gas is discharged into the atmospheric environment, and the urea is transferred to the filling pipe for circulation replenishment, so that during the replenishment process, the pressure of urea on the semipermeable membrane is reduced to avoid damage to the semipermeable membrane, thereby improving the performance and service life of the semipermeable membrane, thereby making the filling assembly more reliable, and the structure of the filling assembly is relatively simple, so that the structural design of the filling assembly is easy to implement, and the production cost of a vehicle equipped with the filling assembly shown above is relatively low.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 It is a structural schematic diagram of a filling assembly according to an embodiment of the utility model;

[0022] Figure 2 is a schematic cross-sectional view of a filling assembly according to an embodiment of the present utility model;

[0023] Reference numerals:

[0024] Filling assembly 10,

[0025] Filling pipe 100, filling port 101, thread 102, first filling section 110, second filling section 120, first bending section 130,

[0026] Air return pipe 200, first air return section 210, second air return section 220, second bending section 230,

[0027] Ventilation assembly 300, vent 301, vent valve 310, accommodating space 311, valve body 312, vent portion 313, air inlet 314, first air outlet 315, second air outlet 316, second limit portion 317,

[0028] Semi-permeable membrane 400, first limiting portion 410,

[0029] Throat assembly 500,

[0030] Quick-connect plug 600 , first mounting seat 610 , second mounting seat 620 . DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention are described in detail below.

[0032] Reference below Figure 1-Figure 2 The filling assembly 10 according to an embodiment of the present invention is described. The urea filling pipe 100 component is connected to the urea tank and includes: a filling pipe 100 , an air return pipe 200 and a ventilation component 300 .

[0033] Specifically, one end of the filling pipe 100 is connected to the inlet of the urea tank, and the other end of the filling pipe 100 is provided with a filling port 101; one end of the return air pipe 200 is connected to the return air port of the urea tank; the ventilation component 300 is provided on the return air pipe 200, and the ventilation component 300 is provided with a vent 301, and a semipermeable membrane 400 is provided on the inner side of the vent 301.

[0034] It's important to note that urea tanks are used to store urea solution, particularly in diesel vehicles, to reduce nitrogen oxide (NOx) emissions from vehicle exhaust. The urea tank uses a urea pump to spray urea solution into the engine's exhaust pipe. The urea solution reacts with nitrogen oxides in the exhaust to produce harmless nitrogen and water, thereby reducing exhaust pollution and enabling vehicle emissions to meet more stringent environmental standards, such as the National IV standard.

[0035] During the specific use of the urea tank, urea will be consumed as the vehicle is used. Therefore, the urea in the urea tank needs to be replenished. During the urea replenishing process, the filling pipe 100 is connected to the inlet on the urea tank so that the replenished urea can enter the urea tank through the filling pipe 100. During the urea replenishing process, the urea will squeeze the gas in the urea tank. Due to the rapid increase in air pressure, the gas is discharged through the return port on the urea tank and then flows to the breather assembly 300 through the return pipe 200. The breather assembly 300 is provided with a semipermeable membrane 400. Due to the high air pressure, the gas cannot be completely discharged through the semipermeable membrane 400. After passing through the breather assembly 300, the gas enters the subsequent throat assembly 500 for discharge, thereby realizing gas discharge. The urea overflowing through the return port is suitable for returning to the filling pipe 100 through the throat assembly 500, thereby successfully replenishing the urea in the urea tank. Furthermore, during normal use of the urea tank, urea will volatilize and escape, so as to realize gas pressure circulation and replenishment through the semipermeable membrane 400, thereby achieving pressure balance in the urea tank.

[0036] In the use process of the filling assembly 10 of the present application, since the filling assembly 10 is suitable for including the filling pipe 100, the return air pipe 200 and the ventilation component 300, the filling pipe 100 is suitable for being connected to the inlet of the urea tank, so that during the urea replenishment process, urea is suitable for entering the filling pipe 100 through the filling port 101 at the other end of the filling pipe 100, and enters the urea tank under the guidance of the filling pipe 100 to complete the urea replenishment in the urea tank, and the gas accumulated in the urea tank will be discharged from the return air port under the pressure of the newly replenished urea, and will be transferred to the urea tank through the return air pipe 200 connected to the return air port. The vent assembly 300 includes a semipermeable membrane 400 disposed therein. The semipermeable membrane 400 selectively allows gas to pass through. During urea filling, pressure rises significantly, preventing complete gas exchange through the semipermeable membrane 400. Instead, a small amount of gas passes through the membrane 400, while the majority of gas is blocked by the membrane 400 and continues to flow to the throat assembly 500. The gas entering the throat assembly 500 is discharged into the atmosphere, while the urea entering the throat assembly 500 is transferred to the filling pipe 100 to replenish the urea in the urea tank. Furthermore, overflowing urea is accumulated in the return pipe 200. When the urea in the urea tank is consumed, the urea is replenished through the return pipe 200.

[0037] During normal use of the urea tank, urea is consumed, the pressure inside the urea tank is lower than the external pressure, and air passes through the semipermeable membrane 400 and enters the urea tank from the air return port to keep the pressure inside the urea tank balanced, thereby facilitating subsequent operation of the urea tank.

[0038] According to the filling assembly 10 of the embodiment of the present invention, by providing a vent assembly 300 on the return air pipe 200, during the filling process of the urea tank, excess gas in the urea tank is suitable for being discharged through the return air pipe 200 and then through the vent assembly 300, and urea overflowing from the urea tank is suitable for being returned to the filling pipe 100 through the throat assembly 500, so that urea can be better replenished into the urea tank according to the design, and the loss and dispersion of urea due to excessive filling can be avoided, thereby reducing the replenishment cost. At the same time, since the throat assembly 500 is connected to the return air pipe 200, the urea transferred through the semipermeable membrane 400 is suitable for being decomposed by the throat assembly 500 and then being suitable for discharging the gas into the atmospheric environment, and the urea is transferred to the filling pipe 100 for circulation replenishment, so that during the replenishment process, the pressure of urea on the semipermeable membrane 400 is reduced to avoid damage to the semipermeable membrane 400, thereby improving the performance and service life of the semipermeable membrane 400, thereby making the filling assembly 10 more reliable in use, and the structure of the filling assembly 10 is relatively simple, so that the structural design of the filling assembly 10 is easy to implement.

[0039] In some embodiments, the ventilation component 300 is a ventilation valve 310, which has a receiving space 311 therein. One side of the receiving space 311 is connected to the return air pipe 200, the vent 301 is provided at one end of the ventilation valve 310, and the semipermeable membrane 400 is provided in the receiving space 311.

[0040] It is understood that the vent assembly 300 is configured as a vent valve 310. Since the vent valve 310 is provided with a receiving space 311, the semipermeable membrane 400 can be accommodated within the vent valve 310 to separate the receiving space 311. This allows gas within the urea tank to flow into the receiving space 311 through the return pipe 200 and, blocked by the semipermeable membrane 400, enter the throat assembly 500 for subsequent discharge. This improves the safety of the semipermeable membrane 400 during use. Furthermore, urea within the urea tank can pass through the semipermeable membrane 400 and then into the throat assembly 500 to be returned to the filling pipe 100 for replenishment, preventing urea from overflowing and wasting. Moreover, the semipermeable membrane 400 is also suitable for forming gas circulation. During the use of the urea tank, the semipermeable membrane 400 can also introduce gas as designed to achieve pressure balance in the urea tank, so that the filling pipe 100 assembly can maintain pressure balance in the urea tank during the filling process of the urea tank and the use of the urea tank, which not only avoids the waste of urea, but also improves the reliability of the use of the urea tank.

[0041] In some embodiments, the vent valve 310 includes a valve body 312 and a vent portion 313, a accommodating space 311 is provided in the valve body 312, an air inlet 314, a first air outlet 315 and a second air outlet 316 are circumferentially spaced apart on the accommodating space 311, a semipermeable membrane 400 is provided on one side of the second air outlet 316, the vent portion 313 is connected to the other side of the second air outlet 316, the vent 301 is provided at the free end of the vent portion 313, and the air outlet direction of the vent portion 313 is inclined downward.

[0042] It can be understood that the vent valve 310 is suitable for including a valve body 312 and a vent portion 313 during the construction process. The valve body 312 is suitable for including the accommodating space 311 as shown above, so that the accommodating space 311 is suitable for being constructed in the valve body 312 to have a higher structural strength to meet subsequent use requirements. An air inlet 314, a first air outlet 315, and a second air outlet 316 are provided on the accommodating space 311. The air inlet 314 is suitable for communicating with the air return port of the urea tank through the air return pipe 200. The air inlet 314 is suitable for being connected to the first air outlet 315, so that the air directed through the air inlet 314 can flow into the vent valve 310, and then enter the vent valve 310 to be blocked by the semi-permeable membrane 400 to avoid being discharged from the second air outlet 316, so that it can be suitable for being discharged from the vent valve 310 through the first air outlet 315 and entering the throat assembly 500 for decomposition, so as to allow the air to enter the atmospheric environment, and the urea is suitable for returning to the filling pipe 100 to avoid waste.

[0043] At the same time, a vent 313 is provided at the second air outlet 316 to allow atmospheric air to be introduced into the vent 313 to balance the pressure within the urea tank. Furthermore, since the air outlet direction of the vent 313 is tilted downward, dust and debris are prevented from entering the storage space 311 through the vent 313, thereby reducing the impact of external air on the urea tank and improving its reliability. Furthermore, the semipermeable membrane 400 separates dust and debris to ensure that dust and debris do not pass through the semipermeable membrane 400 and enter the vent valve 310, thereby preventing them from entering the urea tank. This ensures that the urea in the urea tank is purer and improves the performance of the urea tank during use. Similarly, when the vehicle is wading, since the air outlet direction of the vent portion 313 is inclined downward, the downward-inclined vent portion 313 can facilitate the circulation of moisture, thereby reducing the possibility of moisture entering the ventilation assembly 300. At the same time, even if moisture enters the ventilation valve 310 through the vent portion 313, the semipermeable membrane 400 can block the moisture to prevent the moisture from passing through the semipermeable membrane 400 and then entering the urea tank through the return air pipe 200, thereby avoiding failure of the ventilation assembly 300 and improving the performance of the urea tank.

[0044] In some embodiments, a first limiting portion 410 is provided on the outer periphery of the semipermeable membrane 400, and a second limiting portion 317 is provided on the inner wall of the valve body 312. The first limiting portion 410 is positioned and engaged within the second limiting portion 317. In other words, the first limiting portion 410 is provided on the outer periphery of the semipermeable membrane 400, and the second limiting portion 317 is provided on the inner wall of the valve body 312. This allows the first limiting portion 410 and the second limiting portion 317 to cooperate and engage with each other, thereby confining the semipermeable membrane 400 within the valve body 312. This allows the semipermeable membrane 400 to be used as designed, thereby improving the reliability of the semipermeable membrane 400. At the same time, since the semipermeable membrane 400 is suitable for being restricted by the limiting cooperation between the first limiting portion 410 and the second limiting portion 317, the semipermeable membrane 400 can be used as designed, so that the filling assembly 10 can replenish urea into the urea tank as designed, and at the same time, discharge excess gas in the urea tank through the throat assembly 500 during the filling process, thereby avoiding the influence of accumulated gas on the structure of the urea tank and the semipermeable membrane 400. While making the filling process of the urea tank simpler and more convenient, it can also make the use of the semipermeable membrane 400 more reliable.

[0045] In some embodiments, the filling assembly 10 further includes a throat assembly 500 connected to the first air outlet 315 and disposed on the outer periphery of the filling port 101. It is understood that the throat assembly 500 is adapted to be constructed on the outer periphery of the filling port 101 so that, during use, the throat assembly 500 can divert the air and urea directed and transmitted by the return air pipe 200, allowing the air to pass through the throat assembly 500 into the atmosphere, while the urea guided by the vent assembly 300 is adapted to return to the filling pipe 100 through the throat assembly 500. This ensures that the urea tank can be properly replenished with urea while preventing excess urea from overflowing and being wasted, thereby making urea replenishment of the filling pipe 100 more reliable during use.

[0046] In some specific embodiments, the semipermeable membrane 400 is made of a polymer permeable membrane. That is, the semipermeable membrane 400 is suitable for blocking the flow of liquid while allowing the passage of gas. During use, it can squeeze out the upper layer of air squeezed during the urea tank filling process, while excess gas cannot completely escape through the semipermeable membrane 400. Therefore, the gas and urea are suitable for passing into the throat assembly 500 for diversion, after which the gas escapes while the urea is retained. During the use of the urea tank, the urea in the urea tank is consumed, allowing the semipermeable membrane 400 to allow gas to pass through and be replenished into the urea tank, thereby avoiding a large pressure difference in the urea tank that may affect the subsequent use of the urea tank.

[0047] In some embodiments, the outside of the filling port 101 is provided with threads 102, which are used to connect to the sealing cover. It is understood that the threads 102 on the outside of the filling port 101 allow the sealing cover to connect to the sealing cover via the threads 102 when the cover is installed on the filling port 101. When the sealing cover is properly positioned on the filling port 101, it can be effectively shielded from the outside of the filling port 101, providing protection to prevent debris from entering the filling pipe 100 through the filling port 101 to replenish urea in the urea tank. At the same time, the sealing cover can also ensure relatively stable pressure within the urea tank, making the use of the semipermeable membrane 400 and the urea tank more reliable.

[0048] In some embodiments, the filling assembly 10 also includes: a quick-connect plug 600, on which a first mounting seat 610 and a second mounting seat 620 are spaced apart, the filling pipe 100 is connected to the first mounting seat 610, the first mounting seat 610 is connected to the inlet, the return air pipe 200 is connected to the second mounting seat 620, and the second mounting seat 620 is connected to the return air port. It is understood that the quick-connect plug 600 is provided with a first mounting seat 610 and a second mounting seat 620, allowing the first mounting seat 610 to be connected to the filling pipe 100, while the second mounting seat 620 is suitable for connecting to the return pipe 200. This allows the filling pipe 100 to be connected to the inlet of the urea tank, which is suitable for connection restriction through the first mounting seat 610. This simplifies the assembly process and improves assembly efficiency. It also makes the placement of the filling pipe 100 at the inlet more reliable, allowing the filling pipe 100 to introduce urea into the urea tank to achieve urea replenishment. Similarly, when the urea tank is replenished, it is suitable for discharging gas within the urea tank. The gas is suitable for flowing through the return port, being guided through the return pipe 200, passing through the vent assembly 300, and then decomposing within the throat assembly 500, thereby allowing the gas to be discharged and the urea to be retained, so that the urea can be effectively replenished into the urea tank.

[0049] In some embodiments, the filling pipe 100 includes: a first filling section 110, a second filling section 120 and a first bending section 130, the first bending section 130 is arranged between the first filling section 110 and the second filling section 120, the first filling section 110 is connected to the inlet, and the second filling section 120 is connected to the filling port 101; and / or the return air pipe 200 includes: a first return air section 210, a second return air section 220 and a second bending section 230, the second bending section 230 is arranged between the first return air section 210 and the second return air section 220, the first return air section 210 is connected to the return air port, and the second return air section 220 is connected to the ventilation component 300.

[0050] It can be understood that the filling pipe 100 is suitable for constructing a first filling section 110, a second filling section 120 and a first bending section 130. The first bending section 130 is configured to be bent relative to the extension direction of the first filling section 110 and the second filling section 120. On the one hand, the filling pipe 100 can be adjusted according to the usage during use, so that the use of the filling pipe 100 is simpler and more convenient. While facilitating the replenishment of urea in the urea tank, the urea in the urea tank can be replenished more efficiently. Similarly, the return air pipe 200 is provided with a first return air section 210, a second return air section 220, and a second bending section 230, so that the second bending section 230 can be bent relative to the first return air section 210 and the second return air section 220, so that the return air pipe 200 can be bent as needed, so that urea overflowing from the urea tank can be transferred to the return air pipe 200 for guided circulation. A throat assembly 500 is provided at the other end of the return air pipe 200. The throat assembly 500 is suitable for decomposing and discharging air into the atmosphere, and the urea is suitable for being transferred to the filling pipe 100 for circulation to avoid waste of overflowed urea.

[0051] A vehicle according to an embodiment of the present invention includes the aforementioned filling assembly 10. The filling assembly 10 is installed within the vehicle, and a vent assembly 300 is provided on the return air pipe 200. During the filling process, excess gas within the urea tank is discharged through the return air pipe 200 and then the vent assembly 300. Urea overflowing from the urea tank is returned to the filling pipe 100 through the throat assembly 500. This allows urea to be properly replenished into the urea tank as designed, prevents urea loss and dissipation due to overfilling, reduces replenishment costs, and improves vehicle operating performance. At the same time, since the throat assembly 500 is connected to the return air pipe 200, the urea transferred through the semipermeable membrane 400 is suitable for being decomposed by the throat assembly 500 and then being suitable for discharging the gas into the atmospheric environment, and the urea is transferred to the filling pipe 100 for circulation replenishment, so that during the replenishment process, the pressure of urea on the semipermeable membrane 400 is reduced to avoid damage to the semipermeable membrane 400, thereby improving the performance and service life of the semipermeable membrane 400, thereby making the filling assembly 10 more reliable in use, and the structure of the filling assembly 10 is relatively simple, so that the structural design of the filling assembly 10 is easy to implement, and the production cost of a vehicle equipped with the filling assembly 10 as shown above is relatively low.

[0052] Other structures and operations of the vehicle according to the embodiment of the present invention are well known to those skilled in the art and will not be described in detail here.

[0053] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0054] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A filling assembly connected to a urea tank, characterized in that: include: A filling pipe, one end of which is connected to the inlet of the urea tank, and the other end of which is provided with a filling port; an air return pipe, one end of which is connected to the air return port of the urea tank; A ventilation component is arranged on the return air pipe, and a vent is provided on the ventilation component, and a semi-permeable membrane is provided on the inner side of the vent.

2. The filling assembly according to claim 1, characterized in that: The ventilation component is a ventilation valve, which has a storage space therein. One side of the storage space is connected to the return air pipe. The vent is located at one end of the ventilation valve, and the semipermeable membrane is located in the storage space.

3. The filling assembly according to claim 2, characterized in that: The vent valve includes a valve body and a vent portion, the valve body is provided with the accommodating space, the accommodating space is circumferentially provided with an air inlet, a first air outlet, and a second air outlet, the semipermeable membrane is provided on one side of the second air outlet, the vent portion is connected to the other side of the second air outlet, the vent is provided at the free end of the vent portion, and the air outlet direction of the vent portion is inclined downward.

4. The filling assembly according to claim 3, characterized in that: A first limiting portion is provided on the outer peripheral side of the semipermeable membrane, and a second limiting portion is provided on the inner wall of the valve body. The first limiting portion is limitedly fitted in the second limiting portion.

5. The filling assembly according to claim 3, characterized in that: Also includes: A throat assembly is connected to the first air outlet and is arranged on the outer peripheral side of the filling port.

6. The filling assembly according to claim 1, characterized in that: The semipermeable membrane is made of a polymer permeable membrane.

7. The filling assembly according to claim 1, characterized in that: The outer side of the filling port is provided with a thread, and the thread is used to connect with the sealing cover.

8. The filling assembly according to claim 1, characterized in that: Also includes: A quick-connect plug is provided with a first mounting seat and a second mounting seat at intervals, the filling pipe is connected to the first mounting seat, the first mounting seat is connected to the inlet, the return air pipe is connected to the second mounting seat, and the second mounting seat is connected to the return air port.

9. The filling assembly according to claim 1, characterized in that: The filling pipe comprises: a first filling section, a second filling section and a first bending section, wherein the first bending section is provided between the first filling section and the second filling section, the first filling section is connected to the inlet, and the second filling section is connected to the filling port; and / or The return air pipe includes: a first return air section, a second return air section and a second bending section, the second bending section is arranged between the first return air section and the second return air section, the first return air section is connected to the return air port, and the second return air section is connected to the ventilation component.

10. A vehicle, characterized in that: include: The filling assembly according to any one of claims 1 to 9.

Images