Heating cylinder structure, urea box sensor and urea box assembly
By designing the heating cylinder structure in the urea box sensor and using fluid channels to heat and insulate the urea solution, the problems of icy urea solution in low temperature environments are solved, and efficient heating and stable detection of the urea solution are achieved.
Patent Information
- Application Number
- CN202421178579.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-27
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-05-27
AI Technical Summary
The existing urea tank sensors are prone to freezing in low temperature environments, and bubble interference signals are generated when the urea solution is added or the vehicle is shocked, affecting the accuracy of liquid level detection, resulting in liquid level jumps and safety hazards.
A heating cylinder structure is designed, including a urea solution filling channel in its axial direction and a fluid channel that bends back and forth, and uses high-temperature coolant to heat the urea solution back and forth through the fluid channel, and forms a thermal insulation from the outer part through the fluid channel. Structure, avoid rapid cooling of urea solution.
It effectively improves the heating and thawing efficiency of the urea solution, prevents the urea solution from cooling rapidly, reduces the liquid level jump, ensures that the SCR system can operate normally when the vehicle restarts, and improves the stability and safety of the detection signal.
Smart Images
Figure CN222296339U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automobile exhaust treatment, in particular to a heating cylinder structure, a urea tank sensor and a urea tank assembly. Background Art
[0002] In many cities around the world, automobile exhaust has become the primary source of air pollution. Automobile exhaust contains thousands of chemical substances, which are mainly divided into two categories: gas (carbon monoxide, nitrogen oxides, etc.) and particulate matter. In order to meet the environmental regulations of the EU automobile emission standards, the SCR system is widely promoted in the market to treat gas (carbon monoxide, nitrogen oxides) pollutants in automobile exhaust. The urea tank in the SCR system is used to store urea solution. The sensor is installed on the urea tank, which is responsible for absorbing / returning urea solution, heating urea solution, and detecting the state parameters of urea solution (liquid level, temperature, quality detection).
[0003] In the existing technology, the widely used sensor has a heating tube that is a stainless steel round tube with N spiral turns, and a vertical stainless steel tube with built-in electrical components of different resistance values in the middle to detect the liquid level. The probe is placed at the bottom of the spiral tube to detect the quality and temperature of the urea solution. The principle of detecting the liquid level is to convert the resistance value corresponding to the current liquid level into an electrical signal output according to the different resistance values of different liquid level heights to obtain the specific liquid level height value. However, the existing sensors have the following problems in practical applications: 1. The heating tube is directly inserted into the urea solution inside the urea tank and heats the urea solution around it. Although the spiral structure of the heating tube can increase the heating area, when the vehicle stops running, the SCR system stops working and the heating tube also stops working. The solution in the urea tank will cool down quickly or even freeze in a low temperature environment. When the vehicle is restarted later, the frozen urea solution will cause the SCR system to be unable to operate effectively; 2. Bubbles generated when adding urea solution or due to shock during vehicle operation seriously interfere with the accuracy of the sensor output signal and affect the user's judgment of the actual liquid level situation; 3. The urea liquid level fluctuations generated when the vehicle is running cause the sensor output signal to be unstable, and liquid level jumps often occur. Liquid level jumps at low liquid levels can easily cause sensor signal errors, resulting in vehicle torque limitation, thereby creating certain safety hazards.
[0004] Therefore, it is necessary to at least provide a heating cylinder structure that can prevent the urea solution from cooling down quickly, and provide a urea tank sensor having the heating cylinder structure, and provide a urea tank assembly having the urea tank sensor. Utility Model Content
[0005] The first object of the utility model is to provide a heating cylinder structure which can prevent the urea solution from cooling down quickly.
[0006] A second object of the utility model is to provide a urea tank sensor, wherein the urea tank sensor has a heating cylinder structure capable of preventing the urea solution from cooling down rapidly.
[0007] A third object of the utility model is to provide a urea tank assembly, wherein the urea tank assembly has a urea tank sensor, and the urea tank sensor has a heating cylinder structure that can prevent the urea solution from cooling down quickly.
[0008] To achieve the above-mentioned first purpose, the utility model provides a heating cylinder structure, including a heating body, wherein a first urea solution filling channel connected to the outside is provided in the heating body along its axial direction, and a fluid channel extending back and forth is also provided in the heating body along its axial direction, and the fluid channel is arranged around the first urea solution filling channel along the circumferential direction of the heating body, and a coolant inlet and a coolant outlet are respectively provided on the outside of the heating body, the coolant inlet is connected to one end of the fluid channel, and the coolant outlet is connected to the other end of the fluid channel.
[0009] Compared with the prior art, the heating cylinder structure of the utility model is provided with a heating body, and a first urea solution filling channel is provided in the heating body, so that after the heating body is inserted into the urea box, part of the urea solution in the urea box can be stored in the first urea solution filling channel, and a fluid channel is provided in the circumferential direction of the first urea solution filling channel, and the fluid channel bends and extends back and forth along the axial direction of the heating body. Therefore, after the high-temperature coolant enters the fluid channel from the coolant inlet of the heating body, it will bend and flow back and forth along the fluid channel, and heat the urea solution inside the first urea solution filling channel in the circumferential direction, thereby increasing the heating area of the urea solution in the first urea solution filling channel. , which fully extends the heat conduction path of the high-temperature coolant, effectively improves the heating and thawing efficiency of the urea solution, and has the characteristics of high heating and thawing efficiency of the urea solution. At the same time, since the fluid channel is provided on the peripheral side of the first urea solution filling channel, the first urea solution filling channel is separated from the external urea tank cavity, thereby forming a heat preservation structure, so that the heating body can achieve the heat preservation function like the structure of a thermos bottle, and play a role in heat preservation of the urea solution in the first urea solution filling channel, which can avoid the rapid cooling of the urea solution. When the vehicle stops running, the urea solution in the first urea solution filling channel can be kept warm by the heat preservation structure, so that when the vehicle restarts, the SCR system can operate effectively.
[0010] Preferably, the heating body includes a mounting head, a heating cylinder body and a mounting cover, one axial end of the heating cylinder body is connected to the mounting head, and the other axial end of the heating cylinder body is connected to the mounting cover; the first urea solution filling channel is arranged on the heating cylinder body along the axial direction of the heating cylinder body, the fluid channel is arranged on the heating cylinder body, the mounting head and the mounting cover in a manner of bending back and forth and extending along the axial direction of the heating cylinder body, and the fluid channel is arranged around the first urea solution filling channel along the circumferential direction of the heating cylinder body, and the coolant inlet and the coolant outlet are respectively provided on the mounting head.
[0011] Preferably, a coolant inlet channel and a coolant outlet channel are respectively provided inside the mounting head, one end of the coolant inlet channel forms the coolant inlet on the outside of the mounting head, the other end of the coolant inlet channel is communicated with one end of the fluid channel, one end of the coolant outlet channel forms the coolant outlet on the outside of the mounting head, and the other end of the coolant outflow channel is communicated with the other end of the fluid channel.
[0012] Preferably, the coolant inflow channel is spirally arranged inside the mounting head along the circumferential direction of the mounting head.
[0013] Preferably, the coolant inlet channel includes a plurality of straight hole channels which are perpendicular to each other and connected in sequence along the circumferential direction of the mounting head, one end of the straight hole channel passes through the mounting head, and the other end of the straight hole channel extends to the interior of the mounting head; in the circumferential direction of the mounting head, the first straight hole channel forms the coolant inlet on the outside of the mounting head, and the ends of the remaining straight hole channels exposed to the outside are provided with plugs for sealing them.
[0014] Preferably, the coolant inlet channel bends and extends continuously from one end forming the coolant inlet to the other end.
[0015] Preferably, the fluid channel includes a first flow channel portion, a first connecting portion and a second connecting portion, the first flow channel portion is arranged on the heating cylinder body in a penetrating manner along the axial direction of the heating cylinder body, and a plurality of the first flow channel portions are arranged around the first urea solution filling channel along the circumferential direction of the heating cylinder body; a plurality of the first connecting portions are arranged in sequence on a side of the mounting head facing the heating cylinder body along the circumferential direction of the mounting head, and a plurality of the second connecting portions are arranged in sequence on a side of the mounting cover facing the heating cylinder body along the circumferential direction of the mounting cover; each of the first connecting portions connects two adjacent first flow channel portions in sequence along the circumferential direction of the mounting head, and each of the second connecting portions connects two adjacent first flow channel portions in sequence along the circumferential direction of the mounting head, and the first connecting portions and the second connecting portions are staggered.
[0016] Preferably, the second communicating portion is U-shaped, one end of the second communicating portion is communicated with one of the first flow channel portions, and the other end of the second communicating portion is communicated with another of the first flow channel portions.
[0017] Preferably, an anti-mistake groove is provided on the outer side wall of the heating tube body.
[0018] Preferably, the mounting head, the heating tube body and the mounting cover are an integrated structure.
[0019] Preferably, at least one of the mounting head and the mounting cover is in a detachable connection structure with the heating tube body.
[0020] Preferably, a urea absorption pipe joint and a urea return pipe joint are respectively provided on the mounting head, and a urea absorption channel connected to the urea absorption pipe joint and a urea return channel connected to the urea return pipe joint are provided in the mounting head.
[0021] Preferably, a joint fixing plate is provided on the mounting head, and the joint fixing plate is clamped on the urea absorption pipe joint and the urea return pipe joint.
[0022] Preferably, the heating body is provided with a plurality of second urea solution filling channels arranged along the axial direction thereof and connected to the outside, each of the second urea solution filling channels is arranged around the first urea solution filling channel along the circumferential direction of the heating body, and the second urea solution filling channel is located between the first urea solution filling channel and the fluid channel.
[0023] Preferably, a filter assembly is further included, and the filter assembly is wrapped around the outer side of the heating body.
[0024] Preferably, a baffle is provided on the outer side of the filter assembly.
[0025] To achieve the above-mentioned second purpose, the utility model provides a urea tank sensor, including a detection device and the above-mentioned heating tube structure, wherein the detection device is penetrated on the heating body and faces the first urea solution filling channel, and the detection device is used to detect the urea solution located in the first urea solution filling channel.
[0026] Compared with the prior art, the urea tank sensor of the utility model has a heating cartridge structure. The heating cartridge structure is provided with a heating body, and a first urea solution filling channel is provided in the heating body, so that after the heating body is inserted into the urea tank, part of the urea solution in the urea tank can be stored in the first urea solution filling channel, and a fluid channel is provided in the circumferential direction of the first urea solution filling channel, and the fluid channel bends and extends back and forth along the axial direction of the heating body. Therefore, after the high-temperature coolant enters the fluid channel from the coolant water inlet of the heating body, it will bend and flow back and forth along the fluid channel, and the urea solution inside the first urea solution filling channel will be cooled in the circumferential direction. The liquid is heated, thereby increasing the heating area of the urea solution in the first urea solution filling channel. At the same time, since the fluid channel is provided on the peripheral side of the first urea solution filling channel, the first urea solution filling channel is separated from the external urea tank cavity, thereby forming a heat preservation structure, so that the heating body achieves a heat preservation function like a thermos bottle structure, plays a role in heat preservation of the urea solution in the first urea solution filling channel, and can avoid the urea solution from cooling down quickly. When the vehicle stops running, the urea solution in the first urea solution filling channel can be kept warm by the heat preservation structure, so that when the vehicle restarts running, the SCR system can effectively operate.
[0027] To achieve the third purpose, the utility model provides a urea tank assembly, including a urea tank body and the urea tank sensor. The urea tank body is provided with a cavity for accommodating urea solution. The heating body is arranged on the bottom of the urea tank body and penetrates the cavity. A urea solution channel is provided in the heating body and is connected between the cavity and the lower end of the first urea solution filling channel.
[0028] Compared with the prior art, the urea tank assembly of the utility model has a urea tank sensor, and the urea tank sensor has a heating cylinder structure. The heating cylinder structure is provided with a heating body, and a first urea solution filling channel is provided in the heating body, so that after the heating body is inserted into the urea tank body, part of the urea solution in the urea tank body can be stored in the first urea solution filling channel, and a fluid channel is provided in the circumferential direction of the first urea solution filling channel, and the fluid channel is bent back and forth along the axial direction of the heating body. Therefore, after the high-temperature coolant enters the fluid channel from the coolant water inlet of the heating body, it will bend back and forth along the fluid channel and flow in the circumferential direction of the first urea solution filling channel. The urea solution inside it is heated, thereby increasing the heating area of the urea solution in the first urea solution filling channel. At the same time, since a fluid channel is provided on the peripheral side of the first urea solution filling channel, the first urea solution filling channel is separated from the external urea tank cavity, thereby forming a heat preservation structure, so that the heating body achieves a heat preservation function like a thermos bottle structure, plays a role in heat preservation of the urea solution in the first urea solution filling channel, and can avoid the urea solution from cooling down quickly. When the vehicle stops running, the urea solution in the first urea solution filling channel can be kept warm by the heat preservation structure, so that when the vehicle restarts running, it is guaranteed that the SCR system can run quickly and effectively.
[0029] Preferably, a chuck is provided on the outer periphery of the heating body, and the heating body is clamped on the bottom of the urea tank body through the chuck.
[0030] Preferably, the heating body is provided with an opening communicating between an upper end of the first urea solution filling channel and the cavity. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] Figure 1 It is a cross-sectional view of the urea tank assembly of the utility model.
[0032] Figure 2 It is a cross-sectional view of the urea tank sensor of the utility model.
[0033] Figure 3 It is a three-dimensional structural diagram of the urea tank sensor of the utility model.
[0034] Figure 4 yes Figure 3 Exploded view of the urea tank sensor shown.
[0035] Figure 5 yes Figure 3 A top view of the urea tank sensor is shown.
[0036] Figure 6 It is a front view of the mounting head of the urea tank sensor of the utility model.
[0037] Figure 7 is along Figure 6 Cross-sectional view along the AA direction.
[0038] Figure 8 It is a bottom view of the mounting head of the urea tank sensor of the utility model.
[0039] Fig. 9 It is a three-dimensional structural diagram of the heating cylinder body of the urea tank sensor of the utility model.
[0040] Fig.10 yes Fig. 9 A side view of the heater cylinder body of the urea tank sensor is shown.
[0041] Fig.11 It is a three-dimensional structural diagram of the installation cover of the urea tank sensor of the utility model.
[0042] Fig.12 yes Fig.11 1 is a top view of the mounting cover of the urea tank sensor shown.
[0043] Fig.13 is along Fig.12 Cross-sectional view along the BB direction.
[0044] Fig.14 It is a model diagram of a coolant inflow channel, a fluid channel and a coolant outflow channel inside a urea tank sensor of the utility model.
[0045] Fig.15 It is a model diagram of another embodiment of the coolant inflow channel, the fluid channel and the coolant outflow channel inside the urea tank sensor of the utility model.
[0046] Fig.16 It is a three-dimensional structural diagram of another embodiment of the urea tank sensor of the utility model. DETAILED DESCRIPTION
[0047] In order to explain the technical content and structural features of the present invention in detail, further description will be given below in combination with the embodiments and the accompanying drawings.
[0048] See also Figures 1 to 5 ,as well as Fig.14The urea tank assembly 300 of the utility model includes a urea tank body 301 and a urea tank sensor 200. The urea tank sensor 200 includes a detection device 201 and a heating cylinder structure 100. The heating cylinder structure 100 includes a heating body 1, a first urea solution filling channel 11 connected to the outside is provided in the heating body 1 along its axial direction, a fluid channel 12 extending back and forth is also provided in the heating body 1 along its axial direction, and the fluid channel 12 is arranged around the first urea solution filling channel 11 along the circumferential direction of the heating body 1, and a coolant inlet 13 and a coolant outlet 14 are respectively provided on the outside of the heating body 1, the coolant inlet 13 is connected to one end of the fluid channel 12, and the coolant outlet 14 is connected to the other end of the fluid channel 12. The detection device 201 is arranged on the heating body 1 and faces the first urea solution filling channel 11, and the detection device 201 is used to detect the urea solution in the first urea solution filling channel 11. The urea tank body 301 has a cavity 301a for accommodating urea solution. The heating body 1 is arranged on the bottom of the urea tank body 301 and penetrates the cavity 301a. The heating body 1 is provided with a urea solution channel M connecting the cavity 301a and the lower end of the first urea solution filling channel 11.
[0049] The heating cylinder structure 100 of the utility model is provided with a heating body 1, and a first urea solution filling channel 11 is provided in the heating body 1, so that after the heating body 1 is inserted into the urea tank body 301, part of the urea solution in the urea tank body 301 can enter and be stored in the first urea solution filling channel 11 through the urea solution channel M, and a fluid channel 12 is provided in the circumferential direction of the first urea solution filling channel 11, and the fluid channel 12 is bent and extended back and forth along the axial direction of the heating body 1, so that after the high-temperature coolant enters the fluid channel 12 from the coolant inlet 13 of the heating body 1, it will bend and flow back and forth along the fluid channel 12, and the first urea solution filling channel 11 is circumferentially provided with a fluid channel 12. The urea solution in the first urea solution filling channel 11 is heated, thereby increasing the heating area of the urea solution in the first urea solution filling channel 11. At the same time, since the fluid channel 12 is provided on the peripheral side of the first urea solution filling channel 11, the first urea solution filling channel 11 is separated from the external urea tank cavity 301a, thereby forming a heat preservation structure, so that the heating body 1 can achieve a heat preservation function like a thermos bottle structure, and play a role in heat preservation of the urea solution in the first urea solution filling channel 11, which can avoid the urea solution from cooling down quickly. When the vehicle stops running, the urea solution in the first urea solution filling channel 11 can be kept warm by the heat preservation structure, so that when the vehicle restarts running, it is ensured that the SCR system can run quickly and effectively.
[0050] In addition, the urea solution in the cavity 301a of the urea tank body 301 can enter the first urea solution filling channel 11 of the heating body 1 through the urea solution channel M, so that the first urea solution filling channel 11 in the heating body 1 is consistent with the liquid level of the urea solution in the external cavity 301a. At the same time, the detection device 201 is arranged on the heating body 1 and faces the first urea solution filling channel 11, so the detection device 201 is surrounded by the first urea solution filling channel 11 and contacts the urea solution in the first urea solution filling channel 11. When the urea solution is added to the cavity 301a of the urea tank body 301, the bubbles generated by the fast-flowing urea solution are isolated at the periphery of the heating body 1 and cannot enter the first urea solution filling channel 11 inside the heating body 1, thereby not affecting the accuracy of the detection device 201 in detecting the liquid level. Furthermore, since the urea solution is divided into an inner part and an outer part by the heating body 1, and the diameter of the inner first urea solution filling channel 11 is small, even if the urea solution shakes violently when the vehicle is running, it has little effect on the urea solution inside the heating body 1, thereby improving the problem of liquid level jump of the urea tank sensor 200.
[0051] See also Figures 2 to 4 ,as well as Fig.14 In one embodiment, the heating body 1 includes a mounting head 15, a heating tube body 16 and a mounting cover 17, one axial end of the heating tube body 16 is connected to the mounting head 15, and the other axial end of the heating tube body 16 is connected to the mounting cover 17; the first urea solution filling channel 11 is arranged on the heating tube body 16 along the axial direction of the heating tube body 16, the fluid channel 12 is arranged on the heating tube body 16, the mounting head 15 and the mounting cover 17 in a manner of bending back and forth along the axial direction of the heating tube body 16, and the fluid channel 12 is arranged around the first urea solution filling channel 11 along the circumferential direction of the heating tube body 16, and the coolant inlet 13 and the coolant outlet 14 are respectively provided on the mounting head 15. The high-temperature coolant can first enter the fluid channel 12 of the heating cylinder body 16 through the coolant inlet 13 of the mounting head 15, and then flow back and forth along the fluid channel 12 in the axial direction of the heating cylinder body 16, and flow around the first urea solution filling channel 11 in the circumferential direction of the heating cylinder body 16, thereby heating the urea solution in the first urea solution filling channel 11, and finally flow out through the coolant outlet 14 of the mounting head 15. Therefore, the utility model effectively improves the heating and thawing efficiency of the urea solution by fully extending the heat conduction path of the high-temperature coolant.
[0052] Optionally, the mounting head 15 , the heating tube body 16 and the mounting cover 17 are an integrated structure.
[0053] Optionally, at least one of the mounting head 15 and the mounting cover 17 is in a detachable connection structure with the heating cylinder body 16. For example, the mounting head 15 is in a detachable connection structure with the heating cylinder body 16, and the mounting cover 17 is in an integral structure with the heating cylinder body 16; for another example, the mounting cover 17 is in a detachable connection structure with the heating cylinder body 16, and the mounting head 15 is in an integral structure with the heating cylinder body 16; for another example, both the mounting head 15 and the mounting cover 17 are in a detachable connection structure with the heating cylinder body 16.
[0054] See also Figure 2 In one embodiment, the upper portion of the mounting head 15 is provided with a receiving groove 158 communicating with the cavity 301a, and the lower end of the heating cylinder body 16 extends into the receiving groove 158 and is connected to the mounting head 15. Figure 2 As shown, the starting section of the urea solution channel M between the heating cylinder body 16 and the mounting head 15 is located between the inner side wall of the mounting head 15 and the outer wall of the heating cylinder body 16, then bends and extends to the position between the inner bottom wall of the mounting head 15 and the lower end of the heating cylinder body 16, and finally communicates with the first urea solution filling channel 11.
[0055] See also Figure 6 and Figure 7 In one embodiment, a coolant inflow channel 151 and a coolant outflow channel 152 are respectively provided inside the mounting head 15, one end of the coolant inflow channel 151 forms a coolant water inlet 13 outside the mounting head 15, and the other end of the coolant inflow channel 151 is connected to one end of the fluid channel 12, one end of the coolant outflow channel 152 forms a coolant water outlet 14 outside the mounting head 15, and the other end of the coolant outflow channel 152 is connected to the other end of the fluid channel 12, thereby forming an internal water channel for the high-temperature coolant flow channel. Specifically, the other end of the coolant inflow channel 151 forms a coolant inlet 151c inside the mounting head 15, and the coolant inlet 151c is connected to one end of the fluid channel 12, and the other end of the coolant outflow channel 152 forms a coolant outlet 152a inside the mounting head 15, and the coolant outlet 152a is connected to the other end of the fluid channel 12.
[0056] See also Figure 6 and Figure 7 The coolant inflow channel 151 is spirally arranged inside the mounting head 15 along the circumferential direction of the mounting head 15, thereby further extending the heat conduction path of the high-temperature coolant and improving the heat conduction efficiency. At the same time, the coolant inflow channel 151 can also form a heat preservation module shaped like a thermos cup, which has a good heat preservation effect on the urea solution in the heating cylinder body.
[0057] See also Figure 6 , Figure 7 and Fig.14In one embodiment, the coolant inflow channel 151 includes a plurality of straight hole channels 151a which are perpendicular to each other and connected in sequence along the circumferential direction of the mounting head 15. One end of the straight hole channel 151a penetrates the mounting head 15, and the other end of the straight hole channel 151a extends to the inside of the mounting head 15. In the circumferential direction of the mounting head 15, the first straight hole channel 151a forms a coolant inlet 13 on the outside of the mounting head 15, and the ends of the remaining straight hole channels 151a exposed to the outside are provided with plugs 151b for blocking them. After the high-temperature coolant enters the straight hole channel 151a from the coolant inlet 13 of the mounting head 15, it will swirl around the inside of the mounting head 15 along the straight hole channel 151a, and then enter the fluid channel 12 of the heating cylinder body 16. Among them, the plug 151b and the straight hole channel 151a can be connected by hot melt welding, so that the straight hole channel 151a is blocked by the plug 151b. Specifically, the number of the straight hole channels 151a is six, but not limited thereto, for example, the number of the straight hole channels 151a may also be three or four, etc. Since one end of the straight hole channel 151a passes through the mounting head 15, and the other end of the straight hole channel 151a extends to the interior of the mounting head 15, the convenience of processing the straight hole channel 151a can be greatly improved.
[0058] See also Fig.15 In another embodiment, the coolant inflow channel 151 is continuously bent and extended from one end forming the coolant water inlet 13 to the other end. Specifically, the coolant inflow channel 151 is continuously bent and extended from one end connected to the coolant water inlet 13 to the coolant inlet 151c. Therefore, the coolant inflow channel 151 is an integrated continuous channel, and there is no need to use a plug 151b for blocking. Among them, the installation head 15 can adopt an injection molding process, and the internal coolant inflow channel 151 can be designed as a continuous stainless steel elbow. During injection molding, it is buried in the mold of the installation head 15, so that the stainless steel elbow is embedded in the injection molded installation head 15.
[0059] In some other embodiments, the coolant inflow channel 151 may not be arranged in a spiral manner inside the mounting head 15, but may be set as a channel that goes straight into the mounting head 15. After the high-temperature coolant enters the coolant inflow channel 151 from the coolant inlet 13 of the mounting head 15, it can quickly enter the fluid channel 12 of the heating tube body 16.
[0060] See also Figures 6 to 14In one embodiment, the fluid channel 12 includes a first flow channel portion 121, a first connecting portion 122 and a second connecting portion 123. The first flow channel portion 121 is arranged on the heating cylinder body 16 in an axial direction of the heating cylinder body 16 and penetrates through the heating cylinder body 16. A plurality of first flow channel portions 121 are arranged around the first urea solution filling channel 11 in a circumferential direction of the heating cylinder body 16. A plurality of first connecting portions 122 are sequentially arranged on a side of the mounting head 15 facing the heating cylinder body 16 in a circumferential direction of the mounting head 15. A plurality of second connecting portions 123 are sequentially arranged on a side of the mounting cover 17 facing the heating cylinder body 16 in a circumferential direction of the mounting cover 17. Each first connecting portion 122 sequentially connects two adjacent first flow channel portions 121 in a circumferential direction of the mounting head 15. Each second connecting portion 123 sequentially connects two adjacent first flow channel portions 121 in a circumferential direction of the mounting head 15. The first connecting portions 122 and the second connecting portions 123 are staggered. Therefore, after the high-temperature coolant enters the first first flow channel portion 121 of the heating tube body 16 from the coolant inlet 13, the coolant inflow channel 151 and the coolant inflow port 151c of the mounting head 15, it first flows along the first flow channel portion 121 toward the mounting cover 17, and then turns back through the second connecting portion 123 of the mounting cover 17 and flows along the first flow channel portion 121 and toward the mounting head 15, and then turns back through the first connecting portion 122 of the mounting head 15 and flows along the other first flow channel portion 121 and toward the mounting cover 17. This is repeated, and the high-temperature coolant continuously flows along the fluid channel 12 in the circumferential direction of the heating tube body 16, and continuously makes a turning circulation flow between the mounting head 15 and the mounting cover 17, and finally flows out from the coolant outflow port 152a, the coolant outflow channel 152 and the coolant outlet 14 of the mounting head 15.
[0061] In some other embodiments, the bending position of the fluid channel 12 may be set inside the heating tube body 16, and the mounting cover 17 may not be set; or, the rotating cover and the mounting head 15 may not be set, and the coolant inlet 13, the fluid channel 12 and the coolant outlet 14 may be set on the heating tube body 16.
[0062] See also Fig.12 and Fig.13 In one embodiment, the second communication portion 123 is in a U shape, one end of the second communication portion 123 is in communication with one of the first flow channel portions 121, and the other end of the second communication portion 123 is in communication with another of the first flow channel portions 121. Similarly, the first communication portion 122 may also be in a U shape, one end of the first communication portion 122 is in communication with one of the fluid channels 12, and the other end of the first communication portion 122 is in communication with another of the fluid channels 12. However, the shapes of the first communication portion 122 and the second communication portion 123 are not limited thereto.
[0063] See also Figure 3 and Fig. 9 In one embodiment, an anti-mistake groove 18 is provided on the outer side wall of the heating tube body 16. By providing the anti-mistake groove 18, it can play an anti-mistake role when the heating tube body 16 is assembled.
[0064] See also Figure 3 , Figure 4 and Figure 8 In one embodiment, the mounting head 15 is provided with a urea absorption pipe joint 153 and a urea return pipe joint 154, respectively, and the mounting head 15 is provided with a urea absorption channel 156 connected to the urea absorption pipe joint 153 and a urea return channel 157 connected to the urea return pipe joint 154. Further, the mounting head 15 is provided with a joint fixing plate 155, and the joint fixing plate 155 is clamped on the urea absorption pipe joint 153 and the urea return pipe joint 154, but it is not limited thereto. Among them, the urea absorption pipe joint 153 and the urea return pipe joint 154 can be integrated on the mounting head 15 and integrally injection molded. For example, when the mounting head 15 is injection molded, it has a urea absorption pipe joint 153 and a urea return pipe joint 154 made of plastic material; it can also be a urea absorption pipe joint 153 and a urea return pipe joint 154 embedded with stainless steel material. Thereby, the joint fixing plate 155 part is saved.
[0065] See also Fig. 9 and Fig.10 In one embodiment, a plurality of second urea solution filling channels 19 are arranged in the axial direction of the heating body 1 and communicated with the outside. Each second urea solution filling channel 19 is arranged around the first urea solution filling channel 11 in the circumferential direction of the heating body 1, and the second urea solution filling channel 19 is located between the first urea solution filling channel 11 and the fluid channel 12. Specifically, the second urea solution filling channel 19 is communicated with the urea solution channel M, so the second urea solution filling channel 19 is also communicated with the cavity 301a of the urea tank body 301, and the urea solution in the cavity 301a can also enter the second urea solution filling channel 19 and the first urea solution filling channel 11 through the urea solution channel M.
[0066] The number of the second urea solution filling channels 19 is eight, but not limited thereto. By providing the second urea solution filling channels 19, the diameter of the first urea solution filling channels 11 can be reduced. Even if the urea solution shakes violently when the vehicle is running, the urea solution inside the heating body 1 is little affected, thereby improving the problem of liquid level jump in the urea tank sensor 200. At the same time, the second urea solution filling channels 19 can store urea solution, so that as much urea solution as possible can be stored in the heating cylinder body 16 of the heating body 1, thereby ensuring the amount of urea solution heated.
[0067] See also Fig.16In one embodiment, the heating cylinder structure 100 further includes a filter assembly 2, and the filter assembly 2 is wrapped around the outside of the heating body 1. Specifically, the filter assembly 2 is arranged around the heating cylinder body 16 of the heating body 1 and is located at the connection between the urea solution channel M and the cavity 301a. The urea solution in the cavity 301a enters the urea solution channel M through the filter assembly 2. The filter assembly 2 is used to filter the urea solution entering the urea solution channel M from the cavity 301a. In addition, by wrapping the filter assembly 2 around the heating cylinder body 16 of the heating body 1, the heating cylinder body 16 and the urea solution storage space of the external cavity 301a are divided to a certain extent, which also improves the thermal insulation performance. Furthermore, a baffle 21 is provided on the outside of the filter assembly 2. The baffle 21 can play a certain role in thermal insulation for the urea solution inside the heating body 1. The baffle 21 may be disposed on the outer end surface of the corresponding heating cylinder body 16 , or the baffle 21 may be partially disposed on the outer end surface of the filter assembly 2 at a position corresponding to the urea solution channel M.
[0068] See also Figure 1 and Figure 3 In one embodiment, a chuck 3 is provided on the periphery of the heating body 1, and the heating body 1 is clamped on the bottom of the urea tank body 301 through the chuck 3. Specifically, the chuck 3 is provided on the periphery of the mounting head 15, and the mounting head 15 is clamped on the bottom of the urea tank body 301 through the chuck 3. However, it is not limited to this. In other embodiments, the mounting head 15 and the urea tank body can also be connected by hot plate welding to form a maintenance-free assembly, that is, the chuck 3 is cancelled, and the chuck 3 assembly is not adopted, and the hot plate welding is used to form a whole. It can also be fixed with screws and assembled in a detachable manner.
[0069] See also Figure 2 and Fig.11 In one embodiment, the heating body 1 is provided with an opening 171 connected between the upper end of the first urea solution filling channel 11 and the cavity 301a. Specifically, the opening 171 is arranged on the mounting cover 17, and a cross structure 172 is arranged on the inner wall of the opening 171, but the present invention is not limited thereto.
[0070] In addition, the mounting head 15, the heating tube body 16 and the mounting cover 17 can be made of aluminum alloy, respectively, by a casting process, and then welded and assembled into a whole. Alternatively, the mounting head 15, the heating tube body 16 and the mounting cover 17 can be made into an integrated whole by a casting process, which saves assembly steps and reduces the risk of assembly leakage.
[0071] In summary, the heating cylinder structure 100 of the utility model is provided with a heating body 1, and a first urea solution filling channel 11 is provided in the heating body 1. Part of the urea solution in the urea tank body 301 can enter and be stored in the first urea solution filling channel 11 through the urea solution channel M. After the high-temperature coolant enters the fluid channel 12 from the coolant water inlet 13 of the heating body 1, it will flow back and forth along the fluid channel 12, and heat the urea solution inside the first urea solution filling channel 11 in the circumferential direction, thereby increasing the heating area of the urea solution in the first urea solution filling channel 11, fully extending the heat conduction path of the high-temperature coolant, and effectively improving the urea solution. At the same time, since the fluid channel 12 is provided on the peripheral side of the first urea solution filling channel 11, the first urea solution filling channel 11 is separated from the external urea tank cavity 301a, thereby forming a heat preservation structure, so that the heating body 1 can achieve the heat preservation function like a thermos bottle structure, and play the role of heat preservation of the urea solution in the first urea solution filling channel 11, which can avoid the rapid cooling of the urea solution. When the vehicle stops running, the urea solution in the first urea solution filling channel 11 can be kept warm by the heat preservation structure, so that when the vehicle restarts, the SCR system can operate effectively.
[0072] The above disclosure is only a preferred example of the present invention, which cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are all within the scope of the present invention.
Claims
1. A heating cylinder structure, characterized in that: The heating body comprises a heating body, wherein a first urea solution filling channel communicating with the outside is provided in the heating body along its axial direction, a fluid channel extending and bending back and forth is also provided in the heating body along its axial direction, and the fluid channel is arranged around the first urea solution filling channel along the circumferential direction of the heating body, and a coolant inlet and a coolant outlet are respectively provided on the outer side of the heating body, the coolant inlet is communicated with one end of the fluid channel, and the coolant outlet is communicated with the other end of the fluid channel.
2. The heating tube structure according to claim 1, characterized in that: The heating body includes a mounting head, a heating cylinder body and a mounting cover, one axial end of the heating cylinder body is connected to the mounting head, and the other axial end of the heating cylinder body is connected to the mounting cover; the first urea solution filling channel is arranged on the heating cylinder body along the axial direction of the heating cylinder body, the fluid channel is arranged on the heating cylinder body, the mounting head and the mounting cover in a manner of bending back and forth and extending along the axial direction of the heating cylinder body, and the fluid channel is arranged around the first urea solution filling channel along the circumferential direction of the heating cylinder body, and the coolant inlet and the coolant outlet are respectively provided on the mounting head.
3. The heating tube structure according to claim 2, characterized in that: A coolant inlet channel and a coolant outlet channel are respectively provided inside the mounting head, one end of the coolant inlet channel forms the coolant inlet on the outside of the mounting head, the other end of the coolant inlet channel is communicated with one end of the fluid channel, one end of the coolant outlet channel forms the coolant outlet on the outside of the mounting head, and the other end of the coolant outlet channel is communicated with the other end of the fluid channel.
4. The heating tube structure according to claim 3, characterized in that: The coolant inflow channel is spirally arranged inside the mounting head along a circumferential direction of the mounting head.
5. The heating tube structure according to claim 4, characterized in that: The coolant inlet channel includes a plurality of straight hole channels which are perpendicular to each other and connected in sequence along the circumferential direction of the mounting head, one end of the straight hole channel passes through the mounting head, and the other end of the straight hole channel extends to the interior of the mounting head; in the circumferential direction of the mounting head, the first straight hole channel forms the coolant inlet on the outside of the mounting head, and the ends of the remaining straight hole channels exposed to the outside are provided with plugs to seal them.
6. The heating tube structure according to claim 4, characterized in that: The coolant inflow channel is bent and extends continuously from one end forming the coolant water inlet to the other end.
7. The heating tube structure according to claim 2, characterized in that: The fluid channel includes a first flow channel portion, a first connecting portion and a second connecting portion, the first flow channel portion is arranged on the heating cylinder body in a penetrating manner along the axial direction of the heating cylinder body, and a plurality of the first flow channel portions are arranged around the first urea solution filling channel along the circumferential direction of the heating cylinder body; a plurality of the first connecting portions are arranged in sequence on a side of the mounting head facing the heating cylinder body along the circumferential direction of the mounting head, and a plurality of the second connecting portions are arranged in sequence on a side of the mounting cover facing the heating cylinder body along the circumferential direction of the mounting cover; each of the first connecting portions connects two adjacent first flow channel portions in sequence along the circumferential direction of the mounting head, and each of the second connecting portions connects two adjacent first flow channel portions in sequence along the circumferential direction of the mounting head, and the first connecting portions and the second connecting portions are staggered.
8. The heating tube structure according to claim 7, characterized in that: The second communicating portion is in a U shape, one end of the second communicating portion is communicated with one of the first flow channel portions, and the other end of the second communicating portion is communicated with another of the first flow channel portions.
9. The heating tube structure according to claim 2, characterized in that: An anti-fool groove is provided on the outer side wall of the heating cylinder body.
10. The heating tube structure according to claim 2, characterized in that: The mounting head, the heating tube body and the mounting cover are in an integrated structure.
11. The heating tube structure according to claim 2, characterized in that: At least one of the mounting head and the mounting cover is in a detachable connection structure with the heating tube body.
12. The heating tube structure according to claim 2, characterized in that: The mounting head is provided with a urea absorption pipe joint and a urea return pipe joint, respectively. The mounting head is provided with a urea absorption channel connected with the urea absorption pipe joint and a urea return channel connected with the urea return pipe joint.
13. The heating cartridge structure according to claim 12, characterized in that: The mounting head is provided with a joint fixing plate, and the joint fixing plate is clamped on the urea absorption pipe joint and the urea return pipe joint.
14. The heating cartridge structure according to claim 1, characterized in that: The heating body is provided with a plurality of second urea solution filling channels arranged along the axial direction thereof and connected to the outside, each of the second urea solution filling channels is arranged around the first urea solution filling channel along the circumferential direction of the heating body, and the second urea solution filling channels are located between the first urea solution filling channel and the fluid channel.
15. The heating cartridge structure according to claim 1, characterized in that: It also includes a filter assembly, which is wrapped around the outer side of the heating body.
16. The heating cartridge structure according to claim 15, characterized in that: A baffle is arranged on the outer side of the filter assembly.
17. A urea tank sensor, characterized in that: It comprises a detection device and a heating tube structure as described in any one of claims 1 to 16, wherein the detection device is penetrated on the heating body and faces the first urea solution filling channel, and the detection device is used to detect the urea solution located in the first urea solution filling channel.
18. A urea tank assembly, characterized in that: The invention comprises a urea tank body and the urea tank sensor as claimed in claim 17, wherein the urea tank body has a cavity for accommodating a urea solution, the heating body is arranged on the bottom of the urea tank body and penetrates the cavity, and a urea solution channel is provided in the heating body and is connected between the cavity and the lower end of the first urea solution filling channel.
19. The urea tank assembly according to claim 18, characterized in that: A chuck is provided on the outer periphery of the heating body, and the heating body is clamped on the bottom of the urea tank body through the chuck.
20. The urea tank assembly according to claim 18, characterized in that: The heating body is provided with an opening communicating between the upper end of the first urea solution filling channel and the cavity.