Urea heat management system and vehicle

Abstract

The invention relates to the technical field of vehicle engineering, and provides a urea heat management system and a vehicle. A diesel engine comprises a first refrigerant outlet and a refrigerant backflow port; the urea nozzle comprises a second refrigerant inlet, a second refrigerant outlet and a second urea inlet which are communicated with one another, and the second refrigerant inlet is communicated with the first refrigerant outlet; the first three-way valve comprises a third refrigerant inlet, a third refrigerant outlet A and a third refrigerant outlet B, the third refrigerant inlet can selectively communicate with the third refrigerant outlet A or the third refrigerant outlet B, the third refrigerant inlet communicates with the second refrigerant outlet, and the third refrigerant outlet B communicates with the refrigerant backflow port; the urea tank assembly comprises a fourth refrigerant inlet, a fourth refrigerant outlet and a fourth urea outlet, the fourth refrigerant inlet is communicated with the third refrigerant outlet A, the fourth refrigerant outlet is communicated with the refrigerant backflow port, and the fourth urea outlet is communicated with the second urea inlet. Therefore, a heat management line of the urea system can be simplified, and the heat energy utilization rate is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle engineering, and in particular to a urea thermal management system and a vehicle. Background Art

[0002] In recent years, due to environmental and energy conservation pressures, China's diesel commercial vehicle emission regulations have become increasingly stringent. Starting with the National IV emission standard, SCR has become the mainstream after-treatment technology for diesel engines. The SCR system requires timely and precise injection of urea-water solution into the exhaust pipe. Therefore, the vehicle is equipped with a urea tank to store the urea solution and a pipeline system for thawing and transporting the urea. In actual vehicle operation, a 32.5% urea-water solution is commonly used. This solution freezes and expands at ambient temperatures below -11°C. To ensure proper urea system injection, compliance with emission regulations, and vehicle operation, the urea must be thawed in advance and kept in a liquid state.

[0003] Typically, the urea tank and urea nozzle are heated or cooled using diesel engine coolant, and the urea pipe connecting the two is electrically heated. The heating piping for the urea tank and nozzle is designed to be divided into two paths. The former has an electrically controlled water valve in series, which controls the flow of heated water based on the urea temperature in the tank. The urea nozzle, mounted on the aftertreatment unit, operates in a high ambient temperature, requiring a continuous coolant line. Coolant continuously flows through the nozzle during vehicle operation, ensuring stable and reliable function and performance.

[0004] The above solution will increase the number of thermal management pipelines and interfaces in the vehicle's urea system, making the structural layout complex and the pipelines difficult to straighten out, which will significantly increase the corresponding system cost. In addition, the urea nozzle in the system needs to be continuously cooled, while the low-temperature urea in the urea tank needs to be heated and thawed, and the two requirements are contradictory. The heat added to the coolant by the former is not effectively utilized and is directly transferred back to the diesel engine, further increasing the cooling burden of the entire vehicle. In addition, in order to maintain the continuous injection capability of the urea system, the electrically heated urea pipe will continue to consume the vehicle's electrical energy, and the heat energy of the thermal management transmission pipeline that is always in operation on the vehicle is not fully utilized, resulting in low overall vehicle energy consumption management efficiency.

[0005] Therefore, there is an urgent need for a urea thermal management system and a vehicle to solve the above technical problems. Summary of the Invention

[0006] The object of the present invention is to provide a urea thermal management system and a vehicle, which can simplify the thermal management circuit of the urea system and improve the thermal energy utilization rate.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] Urea thermal management system, including:

[0009] The diesel engine includes a first refrigerant outlet and a refrigerant return port;

[0010] a urea nozzle comprising a second refrigerant inlet, a second refrigerant outlet, and a second urea inlet that are interconnected, wherein the second refrigerant inlet is connected to the first refrigerant outlet;

[0011] A first three-way valve includes a third refrigerant inlet, a third refrigerant outlet A, and a third refrigerant outlet B. The third refrigerant inlet can selectively communicate with the third refrigerant outlet A or the third refrigerant outlet B. The third refrigerant inlet communicates with the second refrigerant outlet, and the third refrigerant outlet B communicates with the refrigerant return port.

[0012] a urea tank assembly comprising a fourth refrigerant inlet, a fourth refrigerant outlet, and a fourth urea outlet, wherein the fourth refrigerant inlet is connected to the third refrigerant outlet A, the fourth refrigerant outlet is connected to the refrigerant return port, and the fourth urea outlet is connected to the second urea inlet;

[0013] A first drive assembly, used for driving the flow of refrigerant;

[0014] The second driving assembly is used to drive the flow of urea.

[0015] As an optimal technical solution for the above-mentioned urea thermal management system, it includes a urea pipe and a second refrigerant pipe. The above-mentioned urea pipe connects the above-mentioned fourth urea outlet and the above-mentioned second urea inlet. The above-mentioned second refrigerant pipe is used to connect the above-mentioned third refrigerant inlet and the above-mentioned second refrigerant outlet. The above-mentioned urea pipe is in close contact with the above-mentioned second refrigerant pipe and can transfer heat.

[0016] As a preferred technical solution of the above-mentioned urea thermal management system, it also includes a thermal insulation sleeve, and the above-mentioned urea pipe and the above-mentioned second refrigerant pipe are both wrapped in the above-mentioned thermal insulation sleeve.

[0017] As an optimal technical solution of the above-mentioned urea thermal management system, the above-mentioned urea tank assembly includes a tank body and a spiral tube. The above-mentioned spiral tube is coiled around the above-mentioned tank body. The above-mentioned tank body is used to hold the above-mentioned urea. The above-mentioned fourth refrigerant inlet and the above-mentioned fourth refrigerant outlet are connected through the above-mentioned spiral tube.

[0018] As a preferred technical solution of the urea thermal management system, the urea tank assembly further includes a pressure sensor, which is installed at the fourth urea outlet.

[0019] As a preferred technical solution of the urea thermal management system, the urea tank assembly further includes a urea filter, and the urea in the tank body passes through the urea filter and then enters the fourth urea outlet.

[0020] As a preferred technical solution of the above-mentioned urea thermal management system, the above-mentioned second drive assembly includes an APU air source and a first air circuit. The above-mentioned first air circuit includes a first air inlet, a first air outlet A and a first air outlet B. The above-mentioned first air inlet is connected to the output end of the above-mentioned APU air source, and the above-mentioned first air outlet A is connected to the second air inlet of the above-mentioned urea tank assembly.

[0021] As a preferred technical solution of the above-mentioned urea thermal management system, the above-mentioned second drive assembly also includes a second three-way valve, the above-mentioned second three-way valve includes a third air inlet, a third air outlet A and a third air outlet B, the above-mentioned first air circuit also includes a first air outlet C, the above-mentioned first air outlet C is connected to the above-mentioned third air inlet, the above-mentioned third air outlet A is connected to the above-mentioned second urea inlet, and the above-mentioned third air outlet B is connected to the above-mentioned fourth urea outlet.

[0022] As a preferred technical solution of the urea thermal management system, the second drive assembly further includes an air filter, which is installed between the APU air source and the first air path.

[0023] A vehicle is also provided, comprising the above-mentioned urea thermal management system.

[0024] Beneficial effects of the present invention:

[0025] First, the diesel engine completes a cold start. Driven by the diesel engine water pump, the coolant builds pressure and flows, raising the coolant temperature through the warm-up process. At the same time, the coolant flows through the first refrigerant outlet of the diesel engine and the second refrigerant inlet of the urea nozzle. The third refrigerant inlet of the first three-way valve is connected to the third refrigerant outlet B, and the third refrigerant inlet is blocked from the third refrigerant outlet A. The coolant flows through the second refrigerant outlet, the third refrigerant inlet, the third refrigerant outlet B, and the refrigerant return port in sequence and returns to the diesel engine to form a cycle. The urea nozzle is continuously cooled until the diesel engine is turned off. In an environment below -11°C, the urea in the urea tank assembly will freeze. At this time, the third refrigerant inlet of the first three-way valve is connected to the third refrigerant outlet A, and the third refrigerant inlet is blocked from the third refrigerant outlet B. The first three-way valve connects the coolant flowing from the urea nozzle to the heating pipe, which can heat the coolant inside it. The heated coolant heats the urea in the urea tank assembly by heat conduction, thawing and heating the urea. After urea is converted into an aqueous solution, its temperature continues to rise. When the temperature of the urea-water solution reaches a calibrated upper limit, the first three-way valve resets, connecting the third refrigerant inlet with the third refrigerant outlet B and blocking it from the third refrigerant outlet A. This allows coolant passing through the urea nozzle to return to the diesel engine, ensuring continuous and smooth flow in the urea nozzle cooling line. As the vehicle operates, if the temperature of the urea-water solution in the urea tank assembly falls below the calibrated lower limit, the first three-way valve reconnects the third refrigerant inlet with the third refrigerant outlet A and blocks it from the third refrigerant outlet B, allowing the coolant to heat the urea-water solution in the urea tank assembly again. Similarly, depending on the vehicle's operating conditions and scenarios, the first three-way valve can be adjusted to allow coolant output from the diesel engine to selectively pass through the urea tank assembly for heating. The thermal management design of the urea system is simplified. By taking advantage of the contradiction between the need to cool the urea nozzle and the need to heat the urea tank assembly, the heat obtained from the urea nozzle is used to heat the coolant as much as possible. The urea tank assembly is heated on demand through a controllable first three-way valve. At the same time, the single medium of coolant is used to complete the cooling and heating thermal management functions of the urea system, reducing the complexity of the urea system, greatly improving the system robustness, and further reducing the system cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in describing the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without any creative work.

[0027] Figure 1 It is a structural diagram of a urea thermal management system provided by an embodiment of the present invention.

[0028] In the picture:

[0029] 1. Diesel engine; 11. First refrigerant outlet; 12. Refrigerant return port;

[0030] 2. Urea nozzle; 21. Second refrigerant inlet; 22. Second refrigerant outlet; 23. Second urea inlet;

[0031] 3. First three-way valve; 31. Third refrigerant inlet; 32. Third refrigerant outlet A; 33. Third refrigerant outlet B;

[0032] 4. Urea tank assembly; 41. Fourth refrigerant inlet; 42. Fourth refrigerant outlet; 43. Fourth urea outlet; 44. Tank body; 45. Urea filter; 46. Pressure sensor; 47. Second air inlet;

[0033] 5. Second drive assembly; 51. APU air source; 521. First air inlet; 522. First air outlet A; 523. First air outlet B; 524. First air outlet C; 53. Second three-way valve; 531. Third air inlet; 532. Third air outlet A; 533. Third air outlet B; 54. Air filter. DETAILED DESCRIPTION

[0034] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0035] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0036] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0037] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[0038] like Figure 1 As shown, the present invention provides a urea thermal management system, including a diesel engine 1, a urea nozzle 2, a first three-way valve 3, a urea tank assembly 4, a first drive assembly and a second drive assembly 5. The diesel engine 1 includes a first refrigerant outlet 11 and a refrigerant return port 12; the urea nozzle 2 includes a second refrigerant inlet 21, a second refrigerant outlet 22 and a second urea inlet 23 that are interconnected, and the second refrigerant inlet 21 is connected to the first refrigerant outlet 11; the first three-way valve 3 includes a third refrigerant inlet 31, a third refrigerant outlet A32 and a third refrigerant outlet B33, and the third refrigerant inlet 31 can selectively connect to the third refrigerant outlet A32 or the third refrigerant outlet B33. The refrigerant inlet 31 is connected to the second refrigerant outlet 22, and the third refrigerant outlet B33 is connected to the refrigerant return port 12; the urea tank assembly 4 includes a fourth refrigerant inlet 41, a fourth refrigerant outlet 42 and a fourth urea outlet 43, the fourth refrigerant inlet 41 is connected to the third refrigerant outlet A32, the fourth refrigerant outlet 42 is connected to the refrigerant return port 12, and the fourth urea outlet 43 is connected to the second urea inlet 23; the first drive assembly is used to drive the refrigerant flow; the second drive assembly 5 is used to drive the urea flow.

[0039] For example, first, the diesel engine 1 completes a cold start, and the coolant builds pressure and flows under the drive of the diesel engine water pump, and the coolant temperature is increased through the warm-up process; at the same time, the coolant flows through the first refrigerant outlet 11 of the diesel engine 1 in sequence, and the second refrigerant inlet 21 of the urea nozzle 2 enters the urea nozzle 2, the third refrigerant inlet 31 of the first three-way valve 3 is connected with the third refrigerant outlet B33, and the third refrigerant inlet 31 is blocked with the third refrigerant outlet A32, and the coolant flows through the second refrigerant outlet 22, the third refrigerant inlet 31, the third refrigerant outlet B33, the refrigerant return port 12 in sequence and returns to the diesel engine 1. The diesel engine 1 forms a circulation. Before the diesel engine 1 is turned off, the urea nozzle 2 will be well and continuously cooled. When the ambient temperature is below -11°C, the urea in the urea tank assembly 4 will freeze. At this time, the third refrigerant inlet 31 of the first three-way valve 3 is connected to the third refrigerant outlet A32, and the third refrigerant inlet 31 is blocked from the third refrigerant outlet B33. The first three-way valve 3 connects the coolant flowing from the urea nozzle 2 to the heating pipe. The heating pipe can heat the coolant inside. The heated coolant heats the urea in the urea tank assembly 4 by heat conduction, and the urea is thawed and heated. After the urea is converted into an aqueous solution, its temperature continues to rise. When the temperature of the urea aqueous solution reaches a calibrated upper limit, the first three-way valve 3 resets, connecting the third refrigerant inlet 31 with the third refrigerant outlet B33 and blocking the third refrigerant inlet 31 from the third refrigerant outlet A32. This allows the coolant passing through the urea nozzle 2 to return to the diesel engine 1, ensuring continuous and smooth flow in the cooling line of the urea nozzle 2. As the vehicle operates, the temperature of the urea aqueous solution in the urea tank assembly 4 drops below the calibrated lower limit. The first three-way valve 3 reconnects the third refrigerant inlet 31 with the third refrigerant outlet A32 and blocks the third refrigerant inlet 31 from the third refrigerant outlet B33, allowing the coolant to heat the urea aqueous solution in the urea tank assembly 4 again. Similarly, according to the vehicle's operating conditions and scenarios, the first three-way valve 3 can be adjusted to allow the coolant output from the diesel engine 1 to selectively pass through the urea tank assembly 4 for heating. The thermal management design of the urea system is simplified. By utilizing the contradiction between the need to cool the urea nozzle 2 and the need to heat the urea tank assembly 4, the heat obtained from the urea nozzle 2 is used as much as possible to heat the coolant. The urea tank assembly 4 is heated on demand through the controllable first three-way valve 3. At the same time, the cooling and heating thermal management functions of the urea system are completed using a single medium, the coolant, thereby reducing the complexity of the urea system, greatly improving the system robustness, and further reducing the system cost.

[0040] Optionally, the urea thermal management system includes a urea pipe and a second refrigerant pipe, the urea pipe connects the fourth urea outlet 43 and the second urea inlet 23, and the second refrigerant pipe is used to connect the third refrigerant inlet 31 and the second refrigerant outlet 22. The urea pipe and the second refrigerant pipe are in close contact and can transfer heat.

[0041] With this arrangement, the urea pipe is in close contact with the second refrigerant pipe, and the urea pipe can obtain heat from the second refrigerant pipe, making full use of the heat in the coolant transmission process after the temperature is raised to prevent the urea inside the urea pipe from freezing. The urea is always in a liquid state, ensuring the normal function of the urea system and the qualified emissions of the whole vehicle. There is no need to set up a separate heat source, which reduces the difficulty of designing and straightening the pipelines of the whole vehicle chassis, improves system reliability and reduces system costs.

[0042] Optionally, the urea thermal management system further includes an insulation jacket, wherein the urea pipe and the second refrigerant pipe are both wrapped in the insulation jacket. The configuration can reduce the heat dissipation rate of the second refrigerant pipe.

[0043] Optionally, the urea tank assembly 4 includes a tank body 44 and a spiral tube. The spiral tube is coiled around the tank body 44. The tank body 44 is used to hold urea. The fourth refrigerant inlet 41 and the fourth refrigerant outlet 42 are connected through the spiral tube.

[0044] For example, the spiral tube is wound around the inner wall or outer wall of the tank body 44, and the refrigerant is passed into the spiral tube and indirectly contacts the urea in the tank body 44 to exchange heat. The setting of the spiral tube can extend the formation of the refrigerant and increase the contact area between the refrigerant and the tank body 44, thereby achieving sufficient heat exchange between the refrigerant and urea.

[0045] Optionally, the urea tank assembly 4 further includes a pressure sensor 46 , which is installed at the fourth urea outlet 43 .

[0046] Illustratively, the pressure sensor 46 is used to obtain the pressure value in the urea pipe. The pressure sensor 46 can be communicatively connected to the second drive assembly 5 . The second drive assembly 5 adjusts its output power according to the pressure value fed back by the pressure sensor 46 .

[0047] Optionally, the urea tank assembly 4 also includes a urea filter 45. Urea in the tank body 44 passes through the urea filter 45 and enters the fourth urea outlet 43. This ensures the purity of the urea entering the urea nozzle 2 and prevents blockage of the urea nozzle 2 and associated pipelines. Optionally, the second drive assembly 5 includes an APU air source 51 and a first air path. The first air path includes a first air inlet 521, a first air outlet A522, and a first air outlet B523. The first air inlet 521 is connected to the output of the APU air source 51, and the first air outlet A522 is connected to the second air inlet 47 of the urea tank assembly 4.

[0048] For example, compressed air generated by the APU air source 51 enters the first air path through the first air inlet 521. Some of the compressed air enters the urea tank assembly 4 through the first air outlet A522, increasing the internal pressure therein and allowing urea in the urea tank assembly 4 to flow from the fourth urea outlet 43 to the urea nozzle 2. Some of the compressed air is discharged through the first air outlet B523 for pressure relief.

[0049] Optionally, the second drive assembly 5 also includes a second three-way valve 53, the second three-way valve 53 includes a third air inlet 531, a third air outlet A532 and a third air outlet B533, the first air circuit also includes a first air outlet C524, the first air outlet C524 is connected to the third air inlet 531, the third air outlet A532 is connected to the second urea inlet 23, and the third air outlet B533 is connected to the fourth urea outlet 43.

[0050] For example, when the urea nozzle 2 needs to perform an injection operation, the second three-way valve 53 is closed, that is, the third air inlet 531 is disconnected from the third air outlet A532 and the third air outlet B533. When the urea nozzle 2 completes its operation, the second three-way valve 53 is opened, and compressed air generated by the APU air source 51 can enter the second three-way valve 53 through the first air path. Some of the compressed air enters the urea nozzle 2 through the third air outlet A532, discharging any remaining urea in the urea nozzle 2. Some of the compressed air flows through the third air outlet B533 toward the urea tank assembly 4, re-injecting the urea between the third air outlet B533 and the fourth urea outlet 43 into the urea tank assembly 4. This keeps the urea pipe and the interior of the urea nozzle 2 clean.

[0051] Optionally, the second drive assembly 5 further includes an air filter 54, which is installed between the APU air source 51 and the first air path. This maintains the purity of the compressed air and prevents impurities from being carried in the compressed air and contaminating and / or clogging related pipes and equipment such as the urea nozzle 2 and the urea tank assembly 4.

[0052] A vehicle is also provided, comprising the above-mentioned urea thermal management system.

[0053] Furthermore, the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions are possible for those skilled in the art without departing from the scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. Urea thermal management system, characterized in that, include: A diesel engine (1) includes a first refrigerant outlet (11) and a refrigerant return port (12); A urea nozzle (2) includes a second refrigerant inlet (21), a second refrigerant outlet (22), and a second urea inlet (23) that are interconnected, wherein the second refrigerant inlet (21) is connected to the first refrigerant outlet (11); A first three-way valve (3) includes a third refrigerant inlet (31), a third refrigerant outlet A (32) and a third refrigerant outlet B (33), wherein the third refrigerant inlet (31) can be selectively connected to the third refrigerant outlet A (32) or the third refrigerant outlet B (33), the third refrigerant inlet (31) is connected to the second refrigerant outlet (22), and the third refrigerant outlet B (33) is connected to the refrigerant return port (12); A urea tank assembly (4) includes a fourth refrigerant inlet (41), a fourth refrigerant outlet (42) and a fourth urea outlet (43), wherein the fourth refrigerant inlet (41) is connected to the third refrigerant outlet A (32) via a heating pipe, the fourth refrigerant outlet (42) is connected to the refrigerant return port (12), and the fourth urea outlet (43) is connected to the second urea inlet (23); A first drive assembly, used for driving the flow of refrigerant; The second driving assembly (5) is used to drive the flow of urea.

2. The urea thermal management system according to claim 1, characterized in that: The invention comprises a urea pipe and a second refrigerant pipe, wherein the urea pipe is connected to the fourth urea outlet (43) and the second urea inlet (23), and the second refrigerant pipe is used to connect the third refrigerant inlet (31) and the second refrigerant outlet (22). The urea pipe and the second refrigerant pipe are in close contact and can transfer heat.

3. The urea thermal management system according to claim 2, characterized in that: It also includes a thermal insulation sleeve, in which the urea pipe and the second refrigerant pipe are both wrapped.

4. The urea thermal management system according to claim 1, characterized in that: The urea tank assembly (4) includes a tank body (44) and a spiral tube, wherein the spiral tube is wound around the tank body (44), the tank body (44) is used to hold the urea, and the fourth refrigerant inlet (41) and the fourth refrigerant outlet (42) are connected through the spiral tube.

5. The urea thermal management system according to claim 4, characterized in that: The urea tank assembly (4) further comprises a pressure sensor (46), and the pressure sensor (46) is installed at the fourth urea outlet (43).

6. The urea thermal management system according to claim 4, characterized in that: The urea tank assembly (4) further includes a urea filter (45), and the urea in the tank body (44) passes through the urea filter (45) and then enters the fourth urea outlet (43).

7. The urea thermal management system according to claim 1, characterized in that: The second drive assembly (5) includes an APU air source (51) and a first air circuit, the first air circuit including a first air inlet (521), a first air outlet A (522) and a first air outlet B (523), the first air inlet (521) being in communication with an output end of the APU air source (51), and the first air outlet A (522) being in communication with a second air inlet (47) of the urea tank assembly (4).

8. The urea thermal management system according to claim 7, characterized in that: The second drive assembly (5) further includes a second three-way valve (53), the second three-way valve (53) including a third air inlet (531), a third air outlet A (532) and a third air outlet B (533), the first air circuit further includes a first air outlet C (524), the first air outlet C (524) is in communication with the third air inlet (531), the third air outlet A (532) is in communication with the second urea inlet (23), and the third air outlet B (533) is in communication with the fourth urea outlet (43).

9. The urea thermal management system according to claim 7, characterized in that: The second drive assembly (5) further includes an air filter (54), and the air filter (54) is installed between the APU air source (51) and the first air path.

10. A vehicle, characterized in that The urea thermal management system comprises the urea thermal management system according to any one of claims 1 to 9.

Images