CN212479371U - Urea tank, exhaust gas aftertreatment system, engine and vehicle - Google Patents

Abstract

The utility model provides a urea jar, exhaust aftertreatment system, engine and vehicle, wherein, the urea jar includes: the urea solution storage device comprises a shell, wherein a space for containing urea solution is formed in the shell; one part of the liquid circulation pipeline is arranged on the shell, and the other part of the liquid circulation pipeline is arranged in the space; the urea heating electromagnetic valve is arranged on the shell and connected with the liquid circulation pipeline, and the urea heating electromagnetic valve is used for controlling the on-off of the liquid circulation pipeline and is also used for heating liquid circulating in the liquid circulation pipeline. Through the technical scheme of the utility model, promoted the speed of unfreezing of the urea solution in the urea jar effectively, reduced the harmful effects to the engine start-up, and the simple structure of urea jar does not occupy extra space.

Description

Urea tank, exhaust gas aftertreatment system, engine and vehicle

Technical Field

The utility model relates to a vehicle equipment technical field particularly, relates to a urea jar, an exhaust aftertreatment system, an engine and a vehicle.

Background

The exhaust gas of the vehicle needs to be purified before being discharged, so that the pollution to the atmosphere is reduced; pollutants such as nitrogen oxide in the waste gas are treated by urea at the present stage; the urea solution is mainly stored in the urea tank, and the urea solution is easy to solidify in a low-temperature environment, so that the urea solution needs to be thawed in the starting process of the engine, and the thawing speed of the urea solution directly influences the starting performance of the engine.

The urea solution in the large-capacity urea tank is generally heated and thawed by taking antifreeze from the end of an engine after the urea solution in the large-capacity urea tank is frozen in a low-temperature environment, but the urea tank of the vehicle has large volume and slow thawing speed, and has adverse effect on the starting of the engine.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to at least one of the problems of the prior art or the related art.

In view of this, an object of the present invention is to provide a urea tank.

Another object of the present invention is to provide an exhaust gas aftertreatment system.

It is still another object of the present invention to provide an engine.

It is yet another object of the present invention to provide a vehicle.

In order to achieve the above object, the present invention provides a urea tank, including: the urea solution storage device comprises a shell, wherein a space for containing urea solution is formed in the shell; one part of the liquid circulation pipeline is arranged on the shell, and the other part of the liquid circulation pipeline is arranged in the space; the urea heating electromagnetic valve is arranged on the shell and connected with the liquid circulation pipeline, and the urea heating electromagnetic valve is used for controlling the on-off of the liquid circulation pipeline and heating liquid circulating in the liquid circulation pipeline.

In this technical scheme, heat the liquid in the liquid circulation pipeline through setting up urea heating solenoid valve, and in the space of casing was located to another part of liquid circulation pipeline, inside the liquid that makes after being heated can get into the urea jar, carries out the heat exchange with the urea solution piece that freezes in the urea jar to can unfreeze for the urea solution fast, reduce the harmful effects to the start-up production of engine.

Specifically, by arranging the liquid circulation pipeline, one part of the liquid circulation pipeline is arranged on the shell, and the other part of the liquid circulation pipeline is arranged in the space of the shell, heat can be conveniently brought into the urea tank through external flowable liquid, and frozen urea solution blocks in the urea tank can be unfrozen; through urea heating solenoid valve's setting, both can control the break-make of feed liquor pipe, can heat for the liquid in the liquid circulation pipeline again, further promote the temperature of liquid, thereby promote liquid to urea solution's thawing effect and unfreezing speed, reduce because urea solution freezes and lead to the bad phenomenon of engine start, and urea heating solenoid valve has integrateed two functions of switch and heating, the part quantity has been reduced, be favorable to saving space, provide bigger space for the urea jar and increase its volume.

In the above technical solution, the urea tank further includes: the baffle is arranged in the shell, the space in the shell is divided into a plurality of subspaces by the baffle, and the other part of the liquid circulation pipeline is positioned in one subspace.

In the technical scheme, the partition board is arranged in the urea tank to divide the space in the shell into a plurality of subspaces, namely frozen urea solution is divided, so that a large urea solution block is divided into a plurality of small urea solution blocks, heat exchange among the small urea solution blocks is reduced to a certain extent through the partition board, the other part of the liquid circulation pipeline is positioned in one of the small urea solution blocks, relatively speaking, the volume of the urea solution block needing to be unfrozen is reduced, namely the same amount of heat is provided for the small urea solution block, the small urea solution block can be unfrozen quickly, and then the unfrozen urea solution block is transferred to the urea solution blocks in other subspaces to realize the purpose of unfreezing all the urea solution blocks, so that the urea solution can be put into use quickly, reducing the impact on engine start-up.

In the above technical solution, the plurality of subspaces are communicated with each other.

In this technical scheme, intercommunication each other between a plurality of subspaces for the urea solution in a subspace thaws the back, can flow to other subspaces, thereby takes the heat to other subspaces, accelerates the urea solution speed of unfreezing in the whole urea jar.

In the technical scheme, a gap is formed between the partition plate and the bottom of the shell, and the plurality of subspaces are communicated with each other through the gap; and/or the partition board is provided with a through hole, and the plurality of subspaces are communicated through the through hole.

In the technical scheme, gaps are formed in the partition plates and the bottom of the shell, so that urea solution can flow in the plurality of subspaces through the gaps, and heat is driven to thaw other subspaces; the clearance sets up in the bottom, make be equipped with in the subspace of return bend after urea solution piece can only most unfreezes, also be the urea solution on upper portion can flow to the bottom, flow to other subspaces from the clearance of bottom again, make when starting like this on the one hand, the heat is mainly concentrated in a subspace, be favorable to unfreezing the urea solution piece in this subspace fast, promote and know the speed of freezing, on the other hand, the urea solution after unfreezing flows to other subspaces from the bottom, because the higher liquid of temperature can upwards float, be favorable to accelerating the convection current of urea solution, thereby promote the speed of unfreezing of the urea solution piece in other subspaces.

The through holes are formed in the partition board, and the purpose that the unfrozen urea solution flows to other subspaces can be achieved. The through holes can be arranged at the bottom of the partition plate, and can also be arranged at other positions.

In any one of the above technical solutions, the plurality of subspaces includes a first subspace, a second subspace, and a third subspace, the second subspace is located between the first subspace and the third subspace, and another portion of the liquid circulation pipeline is disposed in the second subspace.

In this technical scheme, the other part of liquid circulation pipeline is located in the second subspace, namely preferentially unfreeze the subspace that is located the centre, after the subspace that is located the centre unfreezes, the heat is to transmission all around, and because the second subspace is located between first subspace and the third subspace, then the heat can all give off and transmit to first subspace and third subspace, reduced thermal waste, be favorable to promoting the speed of unfreezing of the urea solution piece in first subspace, the third subspace.

In any one of the above solutions, the liquid circulation line includes: the urea heating electromagnetic valve is used for heating the liquid inlet pipe; one end of the bent pipe is communicated with the liquid inlet pipe, and the bent pipe is arranged in the space; and the liquid outlet pipe is arranged on the shell and communicated with the other end of the bent pipe.

In the technical scheme, the liquid inlet pipe, the liquid outlet pipe and the bent pipe are arranged, so that liquid can conveniently flow into the urea tank from the outside, the purpose of bringing heat to the inner space of the urea tank is realized, the freeze thawing is performed from the inner part of the urea tank, the heat utilization efficiency is improved, and the bent pipe is arranged in the space, so that the contact area between a liquid circulation pipeline and urea solution is favorably increased, and the heat exchange area and the heat exchange efficiency are increased; the liquid can flow out of the liquid outlet pipe after heat exchange is finished, so that the liquid can enter the bent pipe again for circular heating after being reheated, and therefore the unfreezing speed of the urea solution block is increased; it should be pointed out that the urea heating electromagnetic valve heats the liquid inlet pipe, namely heats the liquid flowing into the space in the urea tank from the liquid inlet pipe, or heats the liquid before flowing into the urea tank, on one hand, the temperature of the liquid entering the urea tank can be increased, more heat is brought in, so that the thawing speed is accelerated, the temperature difference between the preheated liquid and the urea solution block in the urea tank is larger, and the larger temperature difference is favorable for increasing the heat exchange speed, so that the thawing efficiency is further improved; in addition, urea heating solenoid valve is to the heating of feed liquor pipe, that is to say, urea heating solenoid valve is at casing outside work, and work in the inside space of non-casing, both can guarantee that urea heating solenoid valve work in a relatively stable environment, and the difference in temperature is little, is favorable to guaranteeing its job stabilization nature and reliability, and sets up the urea heating solenoid valve outside, changes in the maintenance work in later stage, need not unpack whole urea tank apart.

It will be appreciated that the elbow may have a variety of shapes, as long as the area of contact with the urea solution is increased.

In the above technical scheme, the bent pipe is spiral or wavy.

The bent pipe is set to be spiral or wavy, so that the contact area between the bent pipe and the urea solution can be increased in a limited space, the heat exchange speed is increased, and the unfreezing speed of the urea solution block is increased.

The utility model discloses technical scheme of second aspect provides an exhaust aftertreatment system, include: a catalytic muffler; the urea tank of any one of the above-mentioned first aspect is connected with a catalytic muffler.

In the technical scheme, by adopting the urea tank of any one of the technical schemes, all beneficial effects of the technical scheme are achieved, and the details are not repeated; the exhaust aftertreatment system comprises a catalytic muffler, the catalytic muffler is connected with the urea tank, and a mixing space is conveniently provided for the urea solution and the exhaust gas, so that the exhaust gas is purified.

The utility model discloses technical scheme of third aspect provides an engine, include: an engine body; the exhaust aftertreatment system according to the second aspect is connected to a supercharger of an engine body.

In this technical solution, by adopting the exhaust gas aftertreatment system according to any one of the above technical solutions, all the beneficial effects of the above technical solutions are achieved, and are not described herein again; the exhaust after-treatment system is connected with the supercharger, so that the exhaust gas discharged by the supercharger can be treated at the first time conveniently, and the phenomenon that the exhaust gas is directly discharged to the atmospheric environment is reduced.

The utility model discloses technical scheme of fourth aspect provides a vehicle, include: a vehicle body; a liquid reservoir; in the urea tank according to any one of the above technical solutions of the first aspect, the urea tank and the liquid storage are disposed on the vehicle body, and the liquid inlet pipe and the liquid outlet pipe of the urea tank are connected to the liquid storage respectively.

In the technical scheme, by adopting the urea tank of any one of the technical schemes, all beneficial effects of the technical scheme are achieved, and the details are not repeated; the liquid inlet pipe and the liquid outlet pipe of the urea tank are respectively connected with the liquid storage device on the vehicle body, the existing liquid stored on the vehicle body can be directly utilized to unfreeze the urea solution, so that the urea tank is multipurpose, other liquid storage devices are not needed, the number of parts is reduced, the space is saved, and the liquid inlet pipe and the liquid outlet pipe are respectively connected with the liquid storage device, so that the liquid can be circulated between the liquid storage device and the urea tank in a reciprocating manner, and the consumption of the liquid is reduced; if some liquid which needs cooling and heat dissipation on the vehicle is utilized, the liquid can also achieve the purpose of cooling and heat dissipation through heat exchange with the urea solution.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.

Drawings

FIG. 1 is a schematic top view of a urea tank according to an embodiment of the present invention;

FIG. 2 is a schematic perspective view of a urea tank according to an embodiment of the present invention;

FIG. 3 is a schematic perspective view of a urea tank according to another embodiment of the present invention;

FIG. 4 is a block diagram schematic of the exhaust aftertreatment system of an embodiment of the invention;

FIG. 5 is a block diagram schematically illustrating the structure of an engine according to an embodiment of the present invention;

fig. 6 is a block diagram schematically illustrating the structure of a vehicle according to an embodiment of the present invention.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 6 is:

1 urea tank, 10 shells, 100 first subspace, 102 second subspace, 104 third subspace, 106 gaps, 12 liquid circulation pipelines, 120 liquid inlet pipes, 122 liquid outlet pipes, 124 bent pipes, 16 urea heating electromagnetic valves, 18 partition plates, 2 exhaust aftertreatment systems, 20 catalytic mufflers, 3 engines, 30 engine bodies, 300 superchargers, 4 vehicles, 40 vehicle bodies and 42 liquid storages.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings, which are illustrated in the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

Some embodiments of the present invention are described below with reference to fig. 1 to 6.

With the implementation of the regulations of the six countries on roads and the four countries on non-roads and the blue sky protection plan, the country has increasingly strong environmental protection, which provides a severe test for the exhaust emission of the post-treatment of the engine. Compared with the three laws of the road country five and the non-road country four, the six laws of the road country and the non-road country put forward more rigorous requirements on pollutants such as nitrogen oxide and the like, so that more advanced exhaust aftertreatment technology is required to support so as to ensure that the exhaust pollutants reach the limit value of the national emission laws and regulations.

For nitrogen oxide pollutants, urea is used for treatment at present. However, in the low-temperature or cold-region in winter, the urea solution is often frozen due to the characteristics of the urea solution, so that the urea solution needs to be thawed during the starting process of the engine; meanwhile, the demand for the vehicle-type oil tanks such as heavy trucks, pump trucks and mixer trucks is increasing day by day, the call for the large-capacity urea tank is also increasing day by day, but the unfreezing time of the urea solution in the large-capacity urea tank is too long, and the starting performance of the engine is greatly influenced, so how to unfreeze the urea solution quickly can directly influence the starting performance of the engine.

The utility model provides a novel urea jar 1, the integrated electromagnetic heating function of this kind of urea jar 1, 1 inside baffle 18 that is equipped with of urea jar carries out the subregion simultaneously, punches below the baffle 18, guarantees that urea solution can circulate each other between different regions. At low temperature, the antifreeze solution is heated by the urea heating solenoid valve 16 and then enters the urea tank 1 through a spiral pipeline. Because the partition plate 18 is arranged in the urea tank 1, the antifreeze liquid only needs to unfreeze a part of areas, so that the unfreezing time of the urea can be greatly shortened, the starting performance of the engine 3 is greatly improved, the structure is simple, and extra space is not occupied.

As shown in fig. 1 to 3, according to an embodiment of the present invention, there is provided a urea tank 1 including a housing 10, a liquid flow line 12, and a urea heating solenoid valve 16.

Specifically, a space for containing a urea solution is provided in the housing 10; a part of the liquid circulation pipeline 12 is arranged on the shell 10, the other part of the liquid circulation pipeline 12 is arranged in the space (100, 102, 104) of the shell 10, and the urea heating electromagnetic valve 16 is arranged on the shell 10 and is connected with the liquid circulation pipeline 12; the urea heating solenoid valve 16 is used for controlling the connection of the liquid circulation pipeline 12, and meanwhile, the urea heating solenoid valve 16 is also used for heating the liquid in the connection of the liquid circulation pipeline 12.

In this embodiment, the liquid in the connection of the liquid circulation line 12 is heated by providing the urea heating solenoid valve 16, and another part of the liquid circulation line 12 is provided in the space (100, 102, 104) of the housing 10, so that the liquid can enter the urea tank 1, and the liquid entering the urea tank 1 has not only a high temperature to sufficiently exchange heat with the frozen urea solution block in the urea tank 1, thereby quickly thawing the urea solution and reducing adverse effects on the start-up of the engine 3.

As shown in fig. 2, except that the heating mode is adopted to accelerate the thawing speed, the utility model discloses still make the improvement on the structure of urea tank 1, particularly, urea tank 1 still includes: the partition plate 18 is arranged in the shell 10, the partition plate 18 divides the space (100, 102 and 104) in the shell 10 into a plurality of subspaces, when the urea solution is frozen, because the space (100, 102 and 104) is divided, the original large urea solution block is divided into small urea solution blocks by the partition plate 18, when the urea solution is unfrozen, the small urea solution blocks can be unfrozen independently, the same amount of heat is provided for the liquid in the bent pipe 124, the unfreezing speed can be greatly improved for the unfreezing of the large urea solution block, and the adverse effect on the starting of the engine 3 is reduced; further, the plurality of subspaces are communicated with each other, so that after the small urea solution blocks in one subspace are thawed, the thawed urea solution can flow to other subspaces and transfer heat, and of course, the partition plate 18 can also transfer a small amount of heat, thereby achieving the purpose of thawing the urea solution in the whole urea tank 1.

It will be understood that another portion of the liquid flow line 12 is located in one of the subspaces for individually heating and thawing a small block of urea solution.

As shown in fig. 3, specifically, in the above embodiment, the partition 18 and the bottom of the housing 10 have the gap 106 therebetween, so that the plurality of subspaces communicate with each other through the gap 106, so that the urea solution can flow between the plurality of subspaces through the gap 106 to transfer heat and ensure the supply of the urea solution; the clearance 106 sets up in the bottom, because the higher liquid of temperature can upwards float for the higher urea solution of the higher temperature of back temperature has the trend of upward movement after unfreezing, thereby produces the convection current with the lower urea solution of upper portion temperature, accelerates heat exchange speed, thereby promotes the speed of unfreezing of the urea solution piece in other subspaces.

In other embodiments, the partition 18 is provided with through holes, and the plurality of subspaces are communicated through the through holes, so that the purpose of flowing the thawed urea solution to other subspaces can be achieved. The through holes may be provided at the bottom of the partition 18, or may be provided at other positions.

In other embodiments, not only is a through hole provided in the partition 18, but the partition 18 is also provided with a gap 106 from the bottom of the urea tank 1.

In any of the above embodiments, as shown in fig. 2, the plurality of subspaces includes a first subspace 100, a second subspace 102 and a third subspace 104, the second subspace 102 is located between the first subspace 100 and the third subspace 104, and another portion of the fluid circulation line 12 is disposed in the second subspace 102.

In this embodiment, another part of the liquid circulation pipeline 12 is disposed in the second subspace 102, that is, the subspace located in the middle is preferentially thawed, and after the subspace located in the middle is thawed, heat is transferred to the periphery, and since the second subspace 102 is located between the first subspace 100 and the third subspace 104, the heat can be completely dissipated and transferred to the first subspace 100 and the third subspace 104, so that the waste of heat is reduced, and the thawing speed of the urea solution block in the first subspace 100 and the third subspace 104 is improved.

As shown in fig. 2, in some embodiments, the first subspace 100, the second subspace 102, and the third subspace 104 are arranged in a horizontal order.

In other embodiments, the first subspace 100, the second subspace 102, and the third subspace 104 are arranged in vertical order.

In any of the above embodiments, the liquid circulation line 12 comprises: liquid inlet pipe 120, drain pipe 122 and return bend 124, the both ends of return bend 124 are connected with liquid inlet pipe 120 and drain pipe 122 respectively, make the liquid in the return bend 124 can flow out from drain pipe 122 after giving off the heat to after reheating, get into return bend 124 again and carry out circulation heating, thereby promote the speed of unfreezing of urea solution piece. The liquid inlet pipe 120 and the liquid outlet pipe 122 are a part of the liquid circulation pipeline 12, and the bent pipe 124 is another part of the liquid circulation pipeline 12.

Specifically, the liquid inlet pipe 120 and the liquid outlet pipe 122 are respectively disposed on the casing 10, and the urea heating solenoid valve 16 is used for heating the liquid inlet pipe 120; an elbow 124 is provided within the space (100, 102, 104), more specifically the elbow 124 is provided within the second subspace 102.

As shown in fig. 2, in some embodiments, the elbow 124 is helical.

In other embodiments, the bend 124 is wavy.

The spiral and wavy bent pipe 124 can increase the contact area with the urea solution, and increase the heat exchange area, thereby increasing the thawing speed.

As shown in fig. 4, an embodiment of a second aspect of the present invention provides an exhaust aftertreatment system 2, comprising: a catalytic muffler 20; the urea tank 1 according to any one of the embodiments of the first aspect is connected to a catalytic muffler 20.

In this embodiment, by using the urea tank 1 according to any one of the above embodiments, all the beneficial effects of the above embodiments are achieved, and are not described herein again; the exhaust gas post-treatment system includes a catalytic muffler 20 and is connected to the urea tank 1 so as to provide a mixing space for the urea solution and the exhaust gas, thereby purifying the exhaust gas.

As shown in fig. 5, an embodiment of a third aspect of the present invention provides an engine 3, including: an engine body 30; the exhaust aftertreatment system 2 according to the second aspect is connected to the supercharger 300 of the engine block 30.

In this embodiment, by adopting the exhaust aftertreatment system 2 according to any one of the embodiments, all the advantages of the embodiments are achieved, and are not described herein again; the exhaust aftertreatment system 2 is connected with the supercharger 300, so that the exhaust gas discharged from the supercharger 300 can be treated at the first time, and the phenomenon that the exhaust gas is directly discharged into the atmospheric environment is reduced.

As shown in fig. 6, an embodiment of a fourth aspect of the present invention provides a vehicle 4, including: a vehicle body 40; a liquid reservoir 42; the urea tank 1, the urea tank 1 and the liquid storage 42 of any one of the above-mentioned first aspect are disposed on the vehicle body 40, and the liquid inlet pipe 120 and the liquid outlet pipe 122 of the urea tank 1 are respectively connected to the liquid storage 42.

In the technical scheme, by adopting the urea tank 1 in any one of the technical schemes, all beneficial effects of the technical scheme are achieved, and the description is omitted; the liquid inlet pipe 120 and the liquid outlet pipe 122 of the urea tank 1 are respectively connected with the liquid storage 42 on the vehicle body 40, the existing liquid stored on the vehicle body 40 can be directly utilized to unfreeze the urea solution, one object is multifunctional, other liquid storage devices are not needed to be arranged, the number of parts is reduced, space saving is facilitated, and the liquid inlet pipe 120 and the liquid outlet pipe 122 are respectively connected with the liquid storage 42, so that the liquid can be circulated between the liquid storage 42 and the urea tank 1 in a reciprocating mode, and consumption of the liquid is reduced.

The liquid reservoir 42 may be used for storing various liquids, such as oil, water, liquids of a specific composition, such as anti-icing liquid, etc., and correspondingly the liquid reservoir 42 may be an anti-icing liquid reservoir, a water tank, a fuel tank, etc. on board the vehicle 4.

Vehicles 4 include, but are not limited to, concrete pump trucks, muck trucks, mixer trucks, heavy trucks.

According to the structure of the urea tank 1 provided by the application, urea can be quickly thawed in a low-temperature environment, and the starting performance of the engine 3 is improved.

The urea tank 1 is integrated with an electromagnetic heating function, and the antifreeze can be further heated before entering the urea tank 1.

The spiral bent pipe 124 is arranged in the urea tank 1 and used for flowing the anti-freezing solution, so that the contact area of the urea tank and the urea solution can be greatly increased, and the urea solution can be rapidly heated.

The internal structure of the urea tank 1 is optimized, the urea tank 1 is partitioned by the internal partition plate 18, and the holes are punched below the partition plate 18, so that the urea solution can be ensured to mutually circulate in different areas. When the urea is unfrozen, only one area in the urea tank 1 needs to be unfrozen independently, so that the unfreezing time is greatly shortened.

The urea tank 1 of the present embodiment is suitable for various types of vehicles 4.

As shown in fig. 1, 2, and 3, the urea tank 1 of the present embodiment integrates an electromagnetic heating function, and the antifreeze solution of the engine 3 enters the urea tank 1 from the liquid inlet pipe 120, is heated by the urea heating solenoid valve 16, and then enters the spiral elbow 124.

A partition plate 18 is arranged in the urea tank 1, and the partition plate 18 divides the urea tank 1 into three areas, namely a first subspace 100, a second subspace 102 and a third subspace 104 which are transversely arranged. Under the condition of low-temperature urea solution solidification, the urea solution in the whole urea box does not need to be heated and unfrozen, and only the urea solution block in the middle area, namely the second subspace 102 needs to be unfrozen, so that the unfreezing time can be greatly shortened.

At the same time, the bottom of the partition 18 of the urea tank 1 is left with a gap 106, as shown in fig. 3.

At normal temperature, the urea solution can flow through the gap 106 at the bottom in different areas. After the urea solution is solidified, the urea solution in the second subspace 102 of the urea tank 1 is thawed first, and after the urea solution in the second subspace 102 is thawed, the thawed urea solution can flow through the gap 106 at the bottom of the partition plate 18, so that the left side and the right side can be continuously heated, that is, the urea solution in the first subspace 100 and the third subspace 104 can be heated, and the goal of completely thawing the urea solution in the whole urea tank 1 can be achieved.

The advantages of this particular embodiment:

1. the urea tank integrates the function of a urea heating electromagnetic valve, and can further heat the antifreeze.

2. A spiral bent pipe for preventing the flow of the antifreeze liquid is embedded in the urea tank, so that the contact area of the bent pipe and the urea solution is increased, and the unfreezing speed of the urea solution is increased.

3. The partition plates are arranged in the urea tank, the urea tank is divided into a plurality of areas, and only the urea solution in the middle area needs to be unfrozen independently, so that the unfreezing volume is reduced, and the unfreezing range is shortened; the lower part of the clapboard is perforated to increase heat exchange, and urea solutions in different areas can also mutually circulate.

Above combine the figure to describe in detail the technical scheme of the utility model, through the utility model discloses a technical scheme has promoted the urea solution's in the urea jar speed of unfreezing effectively, has reduced the harmful effects to the engine start-up, and the simple structure of urea jar does not occupy extra space.

In the present application, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or unit indicated must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A urea tank, comprising:

a housing (10), a space (100, 102, 104) for containing urea solution is arranged in the housing (10);

a liquid flow line (12), a part of the liquid flow line (12) being provided on the housing (10), another part of the liquid flow line (12) being provided in the space (100, 102, 104);

a urea heating electromagnetic valve (16) arranged on the shell (10) and connected with the liquid circulation pipeline (12), wherein the urea heating electromagnetic valve (16) is used for controlling the on-off of the liquid circulation pipeline (12),

wherein the urea heating solenoid valve (16) is also used for heating the liquid circulating in the liquid circulating pipeline (12).

2. The urea tank of claim 1, further comprising:

a partition (18) disposed within the housing (10), the partition (18) dividing a space (100, 102, 104) within the housing (10) into a plurality of subspaces, another portion of the fluid flow conduit (12) being located in one of the subspaces.

3. The urea tank of claim 2,

a plurality of said subspaces are interconnected.

4. The urea tank of claim 3,

a gap (106) is formed between the partition plate (18) and the bottom of the shell (10), and the subspaces are mutually communicated through the gap (106); and/or

The partition plate (18) is provided with a through hole, and the subspaces are communicated through the through hole.

5. The urea tank of any one of claims 2-4,

the plurality of subspaces comprises a first subspace (100), a second subspace (102) and a third subspace (104), the second subspace (102) is located between the first subspace (100) and the third subspace (104), and another part of the liquid circulation pipeline (12) is arranged in the second subspace (102).

6. The urea tank of claim 1 or 2,

the liquid circulation line (12) comprises:

the liquid inlet pipe (120) is arranged on the shell (10), and the urea heating electromagnetic valve (16) is used for heating the liquid inlet pipe (120);

an elbow (124), one end of the elbow (124) is communicated with the liquid inlet pipe (120), and the elbow (124) is arranged in the space (100, 102, 104);

the liquid outlet pipe (122) is arranged on the shell (10), and the liquid outlet pipe (122) is communicated with the other end of the bent pipe (124).

7. The urea tank of claim 6,

the bent pipe (124) is spiral or wavy.

8. An exhaust aftertreatment system, comprising:

a catalytic muffler (20);

urea tank (1) according to any of claims 1 to 7, connected with the catalytic muffler (20).

9. An engine, comprising:

an engine body (30);

the exhaust aftertreatment system (2) of claim 8, being connected to a supercharger (300) of the engine block (30).

10. A vehicle, characterized by comprising:

a vehicle body (40);

a liquid reservoir (42);

urea tank (1) according to one of the claims 1 to 7, the urea tank (1) being provided on the vehicle body (40) together with the liquid reservoir (42), the inlet pipe (120) and the outlet pipe (122) of the urea tank (1) being connected to the liquid reservoir (42), respectively.

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