Urea tank and vehicle with same

Abstract

The invention provides a urea tank and a vehicle with the same, and relates to the technical field of vehicle tail gas treatment. The urea tank comprises a shell, the shell is provided with a containing cavity, and the containing cavity is used for storing urea liquid; the filtering assembly at least comprises a base and a filter, the base is connected with the shell, the filter at least comprises a filter shell, the filter shell is connected with the base, a filtering cavity is defined by the filter shell, and the filtering cavity is communicated with the containing cavity; the cooling assembly comprises a cooling pipeline and an inner cavity shell, the inner cavity shell is connected with the filter shell, the inner cavity shell extends in the circumferential direction of the filter shell, a filtering inner cavity is defined by the inner circle side of the inner cavity shell, a cooling cavity is defined by the outer circle side of the inner cavity shell and the filter shell, and the cooling pipeline extends into the containing cavity; one end of the cooling pipeline communicates with the cooling cavity, and the other end of the cooling pipeline communicates with engine cooling liquid. The problems that in a urea supply module, urea liquid cooling starting unfreezing efficiency is low, and reliability is poor are solved.

Description

Urea tanks and vehicles equipped with them Technical Field

[0001] This invention relates to the field of vehicle exhaust treatment technology, and more specifically, to a urea tank and a vehicle having the same. Background Technology

[0002] In existing technologies, commercial vehicle urea systems typically employ electric heating for defrosting. This involves placing electric heating elements around or inside the filter element to melt the ice layer on its surface. While effective, this method suffers from high energy consumption and uneven heating. Hot air defrosting utilizes the hot air generated by the engine to heat the urea filter element. However, this method depends on the engine's operating status, and the hot air may not be sufficient for rapid defrosting when the engine is first started. Insulation materials are used to wrap the urea filter element, reducing heat loss. However, this only alleviates the freezing problem to a certain extent and cannot actively defrost it.

[0003] There is currently no effective solution to the aforementioned technical problems. Summary of the Invention

[0004] The main objective of this invention is to provide a urea tank and a vehicle having the same, so as to solve the problems of low cold start-up and thawing efficiency and poor reliability of urea liquid in the urea supply module in the prior art.

[0005] To achieve the above objectives, according to one aspect of the present invention, a urea tank is provided, comprising: a shell having a receiving cavity for storing urea solution; a filter assembly including at least a base and a filter, the base being connected to the shell, the filter including at least a filter housing being connected to the base, the filter housing surrounding a filter cavity, the filter cavity communicating with the receiving cavity; and a cooling assembly including a cooling pipe and an inner cavity shell, the inner cavity shell being connected to the filter housing, the inner cavity shell extending circumferentially along the filter housing, the inner circular side of the inner cavity shell surrounding a filter inner cavity, the outer circular side of the inner cavity shell and the filter housing surrounding a cooling cavity, the cooling pipe extending into the receiving cavity, one end of the cooling pipe communicating with the cooling cavity, and the other end of the cooling pipe communicating with engine coolant.

[0006] Furthermore, the inner shell and cooling pipes are all made of metal.

[0007] Furthermore, the filter assembly also includes a liquid outlet pipe, one end of which is connected to the filter inner cavity and the other end of which is connected to the urea pipe. The liquid outlet pipe is used to supply filtered urea solution to the urea pipe.

[0008] Furthermore, the distance from which the liquid outlet extends into the filter cavity is D, where D > 10 mm.

[0009] Furthermore, the urea tank also includes a cover assembly, which is connected to the filter. The cover assembly includes a cover body, which is connected to at least one of the filter housing and the inner cavity housing. The cover body is used to block part of the filter cavity. The cover body has a liquid outlet hole, and the liquid outlet pipe passes through the liquid outlet hole and communicates with the urea pipe.

[0010] Furthermore, the liquid outlet pipeline is made of metal, and the cover plate body is made of metal or plastic.

[0011] Furthermore, the urea tank also includes an anti-icing expansion component, which includes a first buffer member. The first buffer member is connected to at least one of the inner cavity shell and the filter shell. The first buffer member is disposed inside the filter inner cavity and is used to absorb the volume of urea solution expansion.

[0012] Furthermore, the anti-icing expansion assembly also includes a second buffer member, which is connected to at least one of the cover plate body and the inner cavity shell. The second buffer member is disposed on the side of the cover plate body facing the filter cavity and is used to absorb the volume of urea solution expansion.

[0013] Furthermore, the urea tank also includes a sensor assembly, which includes a mounting base and a pressure sensor. The mounting base is connected to the cover plate body, and the pressure sensor is connected to the mounting base. The pressure sensor is located on the side of the cover plate body away from the filter chamber, and the pressure sensor is used to detect at least the expansion pressure of the urea solution on the second buffer.

[0014] According to another aspect of the present invention, a vehicle is provided, the vehicle having a urea tank, the urea tank being the aforementioned urea tank.

[0015] By applying the technical solution of this invention, a filter assembly is provided on the receiving cavity. The filter can filter urea solution and has a filter housing that can be arranged to form a filter cavity. The inner housing of the cooling assembly is disposed in the filter cavity, and the filter cavity is divided into an inner filter cavity and a cooling cavity. The inner filter cavity is used to filter urea solution, while the cooling cavity surrounding the outer side of the inner filter cavity is connected to the engine coolant through a cooling pipe and extends into the receiving cavity through the cooling pipe. This allows the coolant in the cooling pipe to exchange heat with the urea solution in the receiving cavity, achieving rapid thawing of the solution in the receiving cavity. This enables rapid cold start in winter. At the same time, the engine provides heat energy and is connected to the cooling cavity, allowing the coolant to also perform thermal management on the filter. This also prevents urea solution from crystallizing or freezing in the inner filter cavity, ensuring the stable operation of the entire urea tank and filter assembly. This significantly improves the thawing efficiency and reliability of the urea filter element in low-temperature environments and prevents system failure caused by urea freezing in winter. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0017] Figure 1 shows a schematic diagram of the structure of a first embodiment of a urea tank according to the present invention;

[0018] Figure 2 shows a schematic diagram of a second embodiment of the urea tank according to the present invention;

[0019] Figure 3 shows a structural schematic diagram of a third embodiment of the urea tank according to the present invention.

[0020] The above figures include the following reference numerals:

[0021] 10. Filter assembly; 11. Base; 12. Filter; 120. Filter chamber; 121. Filter housing; 13. Liquid outlet pipeline;

[0022] 20. Cooling assembly; 21. Cooling piping; 22. Inner cavity housing; 221. Filter inner cavity; 222. Cooling cavity;

[0023] 30. Cover plate assembly; 31. Cover plate body;

[0024] 40. Anti-icing expansion component; 41. First buffer component; 42. Second buffer component;

[0025] 50. Sensor assembly; 51. Mounting base; 52. Pressure sensor. Detailed Implementation

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0028] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0029] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and therefore their description will be omitted.

[0030] Referring to Figures 1 to 3, a urea tank is provided according to a specific embodiment of this application.

[0031] Specifically, as shown in Figures 1 to 3, the urea tank includes a shell, a filter assembly 10, and a cooling assembly 20. The shell has a receiving cavity for storing urea solution. The filter assembly 10 includes at least a base 11 and a filter 12. The base 11 is connected to the shell, and the filter 12 includes at least a filter housing 121. The filter housing 121 is connected to the base 11 and forms a filter cavity 120, which communicates with the receiving cavity. The cooling assembly 20 includes a cooling pipe 21 and an inner cavity shell 22. The inner cavity shell 22 is connected to the filter housing 121 and extends circumferentially along the filter housing 121. The inner circular side of the inner cavity shell 22 forms a filter inner cavity 221, and the outer circular side of the inner cavity shell 22 and the filter housing 121 form a cooling cavity 222. The cooling pipe 21 extends into the receiving cavity, with one end of the cooling pipe 21 communicating with the cooling cavity 222 and the other end of the cooling pipe 21 communicating with the engine coolant.

[0032] Applying the technical solution of this embodiment, a filter assembly 10 is provided on the receiving cavity. The filter 12 can filter urea solution. The filter 12 has a filter housing 121, which can be arranged to form a filter cavity 120. The inner cavity housing 22 of the cooling assembly 20 is disposed in the filter cavity 120, and the filter cavity 120 is divided into a filter inner cavity 221 and a cooling cavity 222. The filter inner cavity 221 is used to filter urea solution, while the cooling cavity 222 surrounding the outside of the filter inner cavity 221 is connected to the engine coolant through a cooling pipe 21, and extends to the receiving cavity through the cooling pipe 21. Inside the cavity, the coolant in the cooling pipe 21 can exchange heat with the urea solution in the cavity, achieving rapid thawing of the solution and enabling rapid cold starts in winter. At the same time, the engine provides heat energy and connects to the cooling cavity 222, allowing the coolant to also perform thermal management on the filter 12. This also prevents the urea solution from crystallizing or expanding in the filter cavity 221, ensuring the stable operation of the entire urea tank and filter assembly 10. This significantly improves the thawing efficiency and reliability of the urea filter element in low-temperature environments and prevents system failure caused by urea freezing in winter.

[0033] In one embodiment of this application, the outer circumference of the inner cavity shell 22 and the filter shell 121 surround to form a cooling cavity 222. The cooling pipe 21 is arranged in a ring around the filter inner cavity 221 where the urea filter element is located, forming a fully enclosed heat conduction cavity. This ensures that when the coolant flows through the outer periphery of the filter element, the heat is evenly transferred to the entire outer wall surface of the filter element, eliminating the problems of uneven thawing and ice residue caused by traditional local heating.

[0034] In one embodiment of this application, both the inner cavity shell 22 and the cooling pipes 21 are made of metal. By utilizing the inherent high thermal conductivity of metal, an efficient and continuous heat conduction path is established between the engine coolant and the filter inner cavity 221 where the urea filter element is located. This allows the heat carried by the coolant to pass quickly and stably through the metal of the shell and pipes, preventing it from being conducted to the filter inner cavity 221 and the containing cavity where the urea solution is located. Therefore, no external electric heating element is needed, achieving passive and uniform thawing of frozen urea. This avoids the problems of material aging, high energy consumption, and complex control caused by local overheating in traditional electric heating methods.

[0035] Furthermore, the filter assembly 10 also includes a liquid outlet pipe 13. One end of the liquid outlet pipe 13 is connected to the filter inner cavity 221, and the other end of the liquid outlet pipe 13 is connected to the urea pipeline. The liquid outlet pipe 13 is used to supply filtered urea solution to the urea pipeline. The urea solution filtered by the filter element in the filter inner cavity 221 can enter the urea pipeline through the liquid outlet pipe 13. The urea pipeline is a channel connecting the urea tank to the downstream. The liquid outlet pipe 13 directly connects the filter inner cavity 221 of the filter 12 to the urea pipeline, ensuring that the urea solution can be continuously delivered to the exhaust pipe of the post-treatment system for spraying. This avoids the risk of crystallization and blockage of the urea solution in the liquid outlet pipe 13 due to reduced flow rate or local stagnation in low-temperature environments.

[0036] In one embodiment of this application, the distance by which the outlet pipe 13 extends into the filter inner cavity 221 is D, where D > 10 mm. Setting the distance of the outlet pipe 13 to extend into the filter inner cavity 221 by more than 10 mm allows a portion of the outlet pipe 13 to directly enter the urea solution storage area. Since the urea solution in the filter inner cavity 221 undergoes heat conduction through the coolant in the cooling chamber 222, and is heated to a suitable temperature by the residual heat of the engine coolant after engine startup, the extension of one end of the outlet pipe 13 into the filter inner cavity 221 allows the temperature of the urea solution to also be transferred to the outlet pipe 13 via heat conduction (even though the outlet pipe 13, the filter inner cavity 221, and the inner cavity shell 22 form an integral heat-conducting element). This allows for direct and efficient transfer to the urea solution outlet area, effectively eliminating the "cold zone" formed in traditional structures where the outlet pipe only contacts the cavity wall or is only briefly inserted, and preventing urea solution from crystallizing and precipitating near the pipe opening due to insufficient temperature.

[0037] It should be noted that the 10mm extension length in this embodiment is the minimum effective heat conduction distance for heat energy to effectively penetrate to the fluid flow initiation section. The extension length of the outlet pipe 13 can be adjusted according to the size of different filters 12, the size of the filter inner cavity 221, and the overall length of the outlet pipe 13 to achieve effective heat conduction between the filter inner cavity 221 and the outlet pipe 13.

[0038] Further, as shown in Figures 1 and 2, the urea tank also includes a cover assembly 30, which is connected to the filter 12. The cover assembly 30 includes a cover body 31, which is connected to at least one of the filter housing 121 and the inner cavity housing 22. The cover body 31 is used to seal part of the filter cavity 120. A liquid outlet hole is provided on the cover body 31, and the liquid outlet pipe 13 passes through the liquid outlet hole and communicates with the urea pipe. The cover assembly 30 is directly connected to at least one of the filter housing 121 or the inner cavity housing 22 through the cover body 31, forming a closed structure for the filter cavity 120. This serves as a sealing and support structure and can also extend the heat conduction path. The heat carried by the engine coolant can be conducted through the inner cavity housing 22 or the filter housing 121 to the cover body 31, and then transferred to the liquid outlet pipe passing through the liquid outlet hole, achieving active heat preservation and antifreeze of the outlet flow channel without the need for additional heating elements.

[0039] In one exemplary embodiment of this application, a connecting surface is formed at the end of the filter housing 121 facing the cover plate body 31. After the cover plate body 31 is fitted with the connecting surface, it is fixed to the filter housing 121 by bolts. An opening communicating with the filter chamber 120 is provided on the connecting surface, so that one side of the cover plate body 31 blocks the filter chamber 120. A liquid outlet hole is provided on the cover plate body 31, and the liquid outlet pipe 13 extends through the liquid outlet hole into the filter chamber 120 for about 10 mm. When the system supplies urea, the cover plate body 31 can serve as an intermediate medium for heat conduction, ensuring that the urea solution can still flow smoothly in low-temperature environments, significantly improving the start-up reliability and operational stability of the system under extremely cold conditions.

[0040] Optionally, the outlet pipe 13 is made of metal, and the cover plate body 31 is made of metal or plastic. This combination ensures functional integrity while creating a flexible and efficient thermal management path. When the cover plate body 31 is metal, it forms an all-metal heat conduction chain with the outlet pipe 13, the inner cavity shell 22, or the filter shell 121, allowing the waste heat of the coolant to be continuously conducted from the cavity through the cover plate to the inside of the outlet pipe, achieving direct and efficient heating of the urea solution outlet area. When the cover plate body 31 is plastic, although it has low thermal conductivity, because the outlet pipe 13 is metal and penetrates the cover plate, the metal pipe still acts as an independent heat conduction channel, introducing heat from the metal cavity to the outlet. At the same time, the cover plate body 31 can also serve as an insulation structure to prevent the heat in the filter cavity 120 from dissipating quickly through the metal structure, thereby achieving cost optimization and weight reduction through material selection without changing the thermal function.

[0041] Furthermore, the urea tank also includes an anti-ice expansion component 40, which includes a first buffer 41. The first buffer 41 is connected to at least one of the inner cavity shell 22 and the filter shell 121. The first buffer 41 is disposed within the filter inner cavity 221 and is used to absorb the volume of the urea solution during expansion. To solve the high-risk failure problems of traditional urea systems caused by ice expansion, such as filter element rupture, seal failure, or pipeline breakage, the anti-ice expansion component 40 is provided. The first buffer 41 in the anti-ice expansion component 40 is disposed within the filter inner cavity 221 and is fixedly connected to at least one of the inner cavity shell 22 or the filter shell 121. When the urea solution freezes and expands, it actively provides a controllable deformation space to absorb the volume increase, thereby preventing the inner cavity structure from rupturing or permanently deforming due to a sudden increase in internal pressure. It improves the structural durability and safety redundancy of the system under extreme conditions such as extreme low temperatures and long-term shutdowns, so that the entire urea supply module can still maintain physical integrity even if it loses its active defrosting function, providing a basic guarantee for the system to resume operation.

[0042] It should be noted that the first buffer 41 is not a simple filler, but rather a compressible buffer zone constructed within a limited cavity volume through its material elasticity and spatial layout, so that the expansion force generated when ice crystals form is slowly released and absorbed, rather than being conducted to the shell wall or sealing interface.

[0043] Specifically, the anti-icing expansion assembly 40 also includes a second buffer 42, which is connected to at least one of the cover plate body 31 and the inner cavity shell 22. The second buffer 42 is disposed on the side of the cover plate body 31 facing the filter chamber 120 and is used to absorb the volume of the urea solution during expansion. The second buffer 42 and the first buffer 41 can form a two-stage buffer structure. When the urea solution expands due to freezing at low temperature, the second buffer 42 can absorb the pushing force generated between the cover plate body 31 and the filter shell 121 or the inner cavity shell 22, effectively alleviating the local stress concentration caused by crystallization. This avoids the risks of deformation of the cover plate assembly 30, tearing of the sealing surface, or breakage of the root of the outlet pipe 13 caused by the expansion force being borne only by the bottom or side wall in the traditional single-point buffer structure.

[0044] Furthermore, the urea tank also includes a sensor assembly 50, which includes a mounting base 51 and a pressure sensor 52. The mounting base 51 is connected to the cover plate body 31, and the pressure sensor 52 is connected to the mounting base 51. The pressure sensor 52 is located on the side of the cover plate body 31 away from the filter chamber 120. The pressure sensor 52 is used to detect at least the expansion pressure of the urea solution on the second buffer member 42. By placing the pressure sensor 52 on the side of the cover plate body 31 away from the filter chamber 120, i.e., in the outer region where it does not come into contact with the urea solution, the pressure sensor 52 does not directly contact the urea solution or ice crystals. This completely avoids the risk of the sensor probe freezing, corroding, or undergoing mechanical damage in low-temperature environments, significantly improving its long-term reliability and lifespan. Furthermore, the pressure sensor 52 is not used to detect the normal working pressure of the urea solution, but to monitor the expansion pressure signal transmitted by the second buffer 42. That is, when the urea solution in the filter cavity 221 expands in volume due to freezing at low temperature, its thrust is transmitted to the cover plate body 31 through the compression deformation of the second buffer 42, and further transmitted to the mounting base 51, and finally sensed by the pressure sensor 52. The pressure signal becomes the physical basis for the system to judge "whether ice expansion has occurred" and "the degree of ice expansion".

[0045] In one embodiment of this application, when the system's active heating or backflushing function fails, if the pressure sensor 52 detects an abnormal pressure rise (exceeding a preset threshold), the pressure sensor 52 sends the detected abnormal pressure value to the vehicle's control unit in the form of an electrical signal. The control unit can then trigger a fault warning or enter a safety protection mode, alerting the driver or control system that there is a risk of ice expansion and that manual intervention or an emergency heating program is urgently needed. This achieves a functional leap from "passive ice expansion prevention" to "active ice expansion sensing," upgrading what was originally a buffer component used only for structural protection into an intelligent sensing node with status feedback capabilities, thus improving the system's intelligence level.

[0046] According to another specific embodiment of this application, a vehicle is also provided, which has a urea tank, the urea tank being the same as that in the above embodiment. When the urea tank in the above embodiment is applied to a vehicle, the cooling pipe 21 is connected to the engine coolant, and heat is conducted circumferentially to the filter housing 121 through the cooling cavity 222 enclosed by the inner cavity shell 22. Combined with the all-metal or built-in metal guide pipe cover assembly 30, heat conduction and thawing of the urea outlet pipe 13 are achieved. Simultaneously, the filter inner cavity 221 cooperates with the sealing O-ring anti-ice expansion assembly 40 to form an expansion buffer space, allowing the urea liquid in the filter element area to quickly thaw with the help of the engine's residual heat when the vehicle is started in a low-temperature environment. This avoids damage to the pressure sensor or sealing structure due to ice expansion, improving the operational reliability and safety of the urea supply system under low-temperature conditions.

[0047] This application also provides a preferred embodiment of a urea tank. Specifically, the cooling pipe 21 of the coolant inlet / outlet water pipe is combined with the filter chamber 120 of the urea filter element. Stainless steel is preferably used for heat conduction, allowing the urea solution inside the filter element chamber to thaw. The inner shell 22 design allows the coolant to surround the filter chamber 221 containing the urea filter element, improving heat transfer efficiency. The cover body 31 is made entirely of metal to allow the urea outlet pipe 13 to thaw. Alternatively, for weight and cost reduction, the cover body 31 can be made of plastic, with a built-in metal outlet pipe 13. The metal outlet pipe extends more than 10mm into the filter chamber 221, allowing heat to be transferred to the outlet pipe 13.

[0048] To prevent ice expansion failure when the system's backflushing function fails, an anti-ice expansion design is implemented. An O-type second buffer 42 is added to the end of the pressure sensor 52, which absorbs energy through compression during icing to prevent damage. The O-type first buffer 41 designed inside the filter cavity 221 is made of... The 8mm diameter and 60mm diameter are designed to absorb the volume of urea that expands within the cavity.

[0049] As can be seen from the above description, the urea tank in the above embodiments has the following beneficial effects:

[0050] Through optimized heat conduction structure and the design of the circulating cooling inner cavity shell 22, the defrosting efficiency and reliability of the urea filter element in low-temperature environments are significantly improved, effectively preventing system failures caused by urea freezing in winter. Simultaneously, by adding an O-ring (second buffer 42) to the pressure sensor 52 end and selecting a specific specification sealing ring (first buffer 41), the system's anti-ice expansion performance is enhanced. Even in the event of a system backflushing failure, component damage caused by ice expansion can be avoided, ensuring the stable operation of the entire urea treatment system.

[0051] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0052] In addition to the above, it should be noted that the terms "one embodiment," "another embodiment," and "embodiment" used in this specification refer to specific features, structures, or characteristics described in connection with that embodiment, which are included in at least one embodiment described in the general description of this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in connection with any embodiment, the intention is to suggest that implementing such a feature, structure, or characteristic in conjunction with other embodiments also falls within the scope of this invention.

[0053] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0054] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A urea tank, characterized in that, include: A housing having a receiving cavity for storing urea solution; a filter assembly (10) comprising at least a base (11) and a filter (12), the base (11) being connected to the housing, the filter (12) comprising at least a filter housing (121) being connected to the base (11), the filter housing (121) forming a filter cavity (120) communicating with the receiving cavity; and a cooling assembly (20) comprising cooling pipes (21). The inner cavity housing (22) is connected to the filter housing (121). The inner cavity housing (22) extends circumferentially along the filter housing (121). The inner circle side of the inner cavity housing (22) surrounds the filter inner cavity (221). The outer circle side of the inner cavity housing (22) and the filter housing (121) surround the cooling cavity (222). The cooling pipe (21) extends into the receiving cavity. One end of the cooling pipe (21) is connected to the cooling cavity (222), and the other end of the cooling pipe (21) is connected to the engine coolant.

2. The urea tank according to claim 1, characterized in that, The inner cavity shell (22) and the cooling pipe (21) are both made of metal materials.

3. The urea tank according to claim 1 or 2, characterized in that, The filter assembly (10) further includes a liquid outlet pipe (13), one end of which is connected to the filter inner cavity (221), and the other end of which is connected to the urea pipe. The liquid outlet pipe (13) is used to provide the filtered urea solution to the urea pipe.

4. The urea tank according to claim 3, characterized in that, The distance from the outlet pipe (13) to the filter cavity (221) is D, where D > 10 mm.

5. The urea tank according to claim 3, characterized in that, The urea tank also includes a cover plate assembly (30), which is connected to the filter (12). The cover plate assembly (30) includes a cover plate body (31), which is connected to at least one of the filter housing (121) and the inner cavity housing (22). The cover plate body (31) is used to block part of the filter cavity (120). The cover plate body (31) is provided with a liquid outlet hole, and the liquid outlet pipe (13) passes through the liquid outlet hole and communicates with the urea pipe.

6. The urea tank according to claim 5, characterized in that, The liquid outlet pipe (13) is made of metal, and the cover plate body (31) is made of metal or plastic.

7. The urea tank according to claim 6, characterized in that, The urea tank also includes an anti-icing expansion component (40), which includes a first buffer (41). The first buffer (41) is connected to at least one of the inner cavity shell (22) and the filter shell (121). The first buffer (41) is disposed in the filter inner cavity (221) and is used to absorb the volume of the urea solution that expands.

8. The urea tank according to claim 7, characterized in that, The anti-ice expansion assembly (40) further includes a second buffer (42), which is connected to at least one of the cover plate body (31) and the inner cavity shell (22). The second buffer (42) is disposed on the side of the cover plate body (31) facing the filter cavity (120) and is used to absorb the volume of the urea solution expansion.

9. The urea tank according to claim 8, characterized in that, The urea tank also includes a sensor assembly (50), which includes a mounting base (51) and a pressure sensor (52). The mounting base (51) is connected to the cover body (31), and the pressure sensor (52) is connected to the mounting base (51). The pressure sensor (52) is located on the side of the cover body (31) away from the filter chamber (120). The pressure sensor (52) is used to detect at least the expansion pressure of the urea solution on the second buffer (42).

10. A vehicle, characterized in that, The vehicle has a urea tank, which is the urea tank according to any one of claims 1-9.

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