Fuel urea tank module

Abstract

This invention discloses a fuel urea tank module, including a housing. The improved structure adds a confluence mechanism to the second urea chamber, and a third chamber is formed within the housing. A heating resistance wire is installed within the chamber wall, and the third chamber is connected to the outside through a through-hole to allow urea to enter. The heating resistance wire heats up the urea in the third chamber, thawing it. During the gradual heating process, the urea in the second chamber also thaws. The third chamber has an improved configuration with a horizontal and vertical end structure. The horizontal end is inclined, and the vertical end is a confluence, with a suction pipe extending into the vertical end. In the initial heating stage, the vertical end of the third chamber thaws rapidly due to the presence of heat-conducting strips, allowing the suction pipe to extract the urea. The thawed liquid in the horizontal end continuously flows into the vertical end, achieving confluence. Under the heat transfer of the heat-conducting fins, the thawed liquid from the periphery of the housing flows into the chamber through the through-hole and converges at the vertical end. This method gradually thaws to meet usage requirements, reducing pollutant emissions during vehicle use.

Description

Technical Field

[0001] This invention relates to the field of vehicle equipment technology, and more specifically to a fuel urea tank module. Background Technology

[0002] Adding urea to vehicles is mainly for those with diesel engines. Diesel engines emit harmful nitrogen oxides, causing environmental pollution. Prolonged inhalation of these exhaust gases can be very harmful to human health. To reduce this damage, urea is added to vehicles with diesel engines. Urea has a catalytic effect; it reacts with nitrogen oxides, converting them into nitrogen gas and water, which are then released into the air.

[0003] The most mature application currently is the SCR (Self-Repairing and Decompression) system, which uses urea pumps to extract urea and treat exhaust gases. However, in colder seasons or regions, urea may freeze, making it impossible for pumps to extract it. To address this, an electric heating defrosting solution exists, which uses resistance wire heating. This involves fixing an electric heater at the end cap and inserting it into the urea tank. However, this method suffers from slow defrosting and needs improvement. Summary of the Invention

[0004] To address at least one of the aforementioned technical deficiencies, the present invention provides the following technical solution:

[0005] This application discloses a fuel urea tank module, including a housing. The housing cavity is divided into two independent chambers, chamber one for containing fuel and chamber two for containing urea. A manifold mechanism is provided in chamber two. The manifold mechanism includes a shell, heat-conducting fins, a heating resistance wire, a heat-conducting strip, and a liquid extraction pipe. A sealed chamber three is formed inside the shell, and a heating resistance wire is provided in the wall of chamber three. Chamber three includes a horizontal end and a vertical end. The horizontal end is inclined and its lower end is connected to the vertical end. A heat-conducting strip is provided in the chamber of the vertical end, and the end of the heat-conducting strip is connected to the wall of the vertical end. One end of the liquid extraction pipe is located in the chamber of the vertical end, and the other end is located outside the shell. Heat-conducting fins are provided on the peripheral wall corresponding to the horizontal end of chamber three. Several through holes communicating with chamber two are provided on the peripheral wall of chamber three.

[0006] This design improves the structure by adding a confluence mechanism to chamber two, which contains urea, and forming chamber three within the shell. Heating resistance wires are installed within the chamber walls, and chamber three is connected to the outside through a through-hole to allow urea to enter. The heating resistance wires raise the temperature, thawing the urea in chamber three. During the gradual heating process, the urea in chamber two also thaws. The design of chamber three is improved, with a horizontal and vertical structure. The horizontal end is inclined, and the vertical end is a confluence, with a suction pipe extending into the vertical end. In the initial heating stage, the vertical end of chamber three thaws rapidly due to the presence of heat-conducting strips, allowing the suction pipe to extract the urea. The thawing fluid in the horizontal end continuously flows into the vertical end, achieving confluence. Under the heat transfer of the heat-conducting fins, the thawing fluid from the periphery of the shell flows into the chamber through the through-hole and converges at the vertical end. This method gradually thaws to meet usage requirements, reducing pollutant emissions during vehicle use.

[0007] Furthermore, a groove is formed at the bottom wall of the second chamber, and the longitudinal end of the third chamber is located in the groove with a gap between its peripheral wall and the groove wall. The structure of the formed groove facilitates the placement of the longitudinal end and the flow of thawing fluid.

[0008] Furthermore, a urea drain outlet is provided at the bottom wall of the groove, and an end cap for sealing is provided to facilitate drainage.

[0009] Furthermore, mounting holes are formed on the bottom wall of the box corresponding to the second chamber, and a sealing cover is fixed at the mounting holes. The groove is formed at the sealing cover. The split structure facilitates the installation of the manifold mechanism in the second chamber.

[0010] Furthermore, the heat-conducting fins include plates and ribs. The plates are spaced apart around the upper part of the three corresponding peripheral walls of the chamber. Ribs are spaced apart along the length direction on the front and back of the plates. Some through holes are located between the two plates. The plates and ribs assist in the transfer of heat to achieve rapid defrosting.

[0011] Furthermore, the box body is provided with through holes, the walls of adjacent through holes are connected to each other, and the wall of the through hole on the side is connected to the side wall of the box body. The through holes divide the box body cavity into two independent chambers, chamber one and chamber two. The structure of the through holes facilitates the integral molding of the box body by rotational molding.

[0012] Furthermore, a fuel filler port is provided on the top wall of chamber one, a urea filler port is provided on the top wall of chamber two, and a drain port is provided on the bottom wall of chamber one.

[0013] Furthermore, filter cups are installed at both the fuel filler port and the urea filler port to filter the liquids during the filling process.

[0014] Furthermore, sensor interfaces are provided on the top walls of both chamber one and chamber two, and fuel sensors and urea sensors are respectively installed at the sensor interfaces. A second mounting hole is provided on the top wall of chamber two, and a vent valve is installed at the second mounting hole. An observation window is provided on the side wall of chamber two. The addition of the vent valve facilitates venting, and the addition of the observation window facilitates observation of the interior of the chamber.

[0015] Furthermore, a recessed groove is provided on the side of the top wall of the box corresponding to the first chamber, and a filter bracket for fixing the filter is provided on the groove wall. A urea pump bracket for fixing the urea pump is provided on the end face of the box corresponding to the second chamber. The filter bracket and urea pump bracket are reasonably arranged to facilitate the installation of the filter and urea pump.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. The present invention adds a confluence mechanism, with the longitudinal end of the third chamber as a confluence channel, so that the gradually thawing urea and other substances flow to the longitudinal end to meet the extraction needs of the extraction pipe. The step-by-step, rapid thawing structure helps to reduce pollutant emissions during vehicle use. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the fuel urea tank module in Example 1;

[0020] Figure 2 This is a partial cross-sectional structural diagram of the fuel urea tank module;

[0021] Figure 3 This is a schematic diagram of the overall structure of the merging mechanism;

[0022] The attached figures are labeled as follows:

[0023] 1. Chamber 1; 2. Chamber 2; 3. Fuel filler port; 4. Urea filler port; 5. Urea sensor interface; 6. Through hole; 7. Fuel sensor; 8. Vent valve; 9. Groove; 10. Filter bracket; 11. Urea pump bracket; 12. Drain port; 13. Urea drain port; 14. Manifold mechanism; 141. Housing; 142. Horizontal end; 143. Heat conduction strip; 144. Through hole; 145. Vertical end; 146. Heating resistance wire; 147. Plate; 148. Suction tube; 149. Rack. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0025] Example 1

[0026] like Figure 1 , Figure 2 , Figure 3 As shown, in this example, the fuel urea tank module includes a rectangular housing. The housing is divided into two independent chambers: chamber 1 (fuel tank) and chamber 2 (urea tank). Chamber 1 contains fuel, and chamber 2 contains urea. The partitioning of chambers 1 and 2 is as follows: Figure 1 As shown, a through hole 6 is added. The two ends of the through hole are located at the top wall and bottom wall of the box, respectively. The walls of adjacent through holes are connected to each other, and the wall of the through hole on the side is connected to the side wall of the box. The through hole structure divides the box cavity into two independent chambers, chamber one and chamber two. The box is formed by rotational molding. Multiple rows of heating columns are arranged at intervals on the rotational molding mold. During the rolling process, the raw material melts and adheres to the gap between two adjacent heating columns and the gap between the heating column and the side wall of the box. After the heating column is removed, the through hole is formed.

[0027] In this example, a manifold mechanism 14 is added to the second chamber. The manifold mechanism 14 includes a housing 141, heat-conducting fins, heating resistance wire 146, heat-conducting strip 143, and liquid extraction tube 148. The housing is L-shaped. A third chamber is formed inside the housing 141. The horizontal inner chamber of the housing 141 is the horizontal end 142 of the third chamber, and the vertical inner chamber of the housing 141 is the vertical end 145 of the third chamber. The heating resistance wire 146 is installed inside the cavity wall of the housing 141.

[0028] The transverse end 142 of chamber three is inclined, as... Figure 2 As shown, the bottom wall of the transverse end 142 of the third chamber is inclined upward, and the lower end of the bottom wall of the transverse end 142 of the third chamber is connected to the cavity opening of the longitudinal end 145. A heat-conducting strip 143 is fixed inside the longitudinal end 145 of chamber three. The heat-conducting strip is integrally formed with the shell and is made of heat-conducting material. The distribution of the heat-conducting strip 143 can be selected according to the requirements, such as parallel type, cross type, etc. After the heating resistance wire is started, the urea in the longitudinal end 145 of chamber three is rapidly thawed under the heat transfer of the shell wall and the heat-conducting strip 143. The tail end of the liquid extraction tube 148 extends to the bottom wall of the longitudinal end 145. The head end of the liquid extraction tube 148 is outside the top wall of the shell 141 to facilitate connection with the urea pump through pipes, etc. The thawed urea in the longitudinal end 145 is extracted by the liquid extraction tube 148. Under continued heating, the urea near the cavity wall in the transverse end 142 of chamber three is thawed first and flows along the inclined bottom wall into the longitudinal end cavity for continued extraction.

[0029] In this example, to facilitate the flow, a groove is formed on the bottom wall of chamber 2. The longitudinal end 145 of chamber 3 is located in the groove, and there is a gap between its peripheral wall and the groove wall. The groove is located at a low position, so the thawed urea outside the shell and inside the shell cavity flows into the longitudinal end cavity for extraction by the extraction tube.

[0030] In this example, through holes 144 are formed at intervals on the peripheral wall of chamber three, which are connected to chamber two outside the shell. The thawed urea in chamber two outside the shell 141 flows into the longitudinal end 145 cavity through the through holes 144, gradually thaws, and is then drawn by the pumping pipe. The pipe between the pumping pipe and the urea pump can be connected to another heating pipe in parallel. This heating pipe is connected to cooling water, and the parallel cooling water heating can quickly thaw the pipe between the pumping pipe and the urea pump without affecting the flow of liquid.

[0031] In this example, a urea drain outlet 13 is formed at the bottom wall of the groove and an end cap for sealing is installed to facilitate drainage. To facilitate the installation of the manifold mechanism, the bottom of the urea tank is split, that is, mounting holes are formed at the bottom wall of the tank corresponding to the second chamber, and a sealing cap is fixed at the mounting holes. A groove is formed on the top surface of the sealing cap.

[0032] In this example, to improve the defrosting speed, heat-conducting fins are integrally formed on the peripheral wall of the transverse portion of the shell 141, such as... Figure 2 , Figure 3 As shown, the heat-conducting fins include plates 147 and ribs 149. The plates 147 are spaced around the upper part of the periphery of the shell 141 corresponding to the three transverse ends 142 of the chamber. Ribs 149 are spaced along the length of the front and back of the plates 147 to ensure that some through holes are located between the two plates. Figure 3 As shown, through holes 144 are formed at intervals on the peripheral wall near the lower sheet. The addition of heat-conducting fins helps to improve the urea thawing of the adjacent shell peripheral wall, enabling step-by-step thawing, liquid collection and extraction, and meeting the usage requirements.

[0033] In addition, a fuel filler port 3 is formed on the top wall of chamber 1, a urea filler port 4 is formed on the top wall of chamber 2, a fuel drain port 12 is formed on the bottom wall of chamber 1, and a urea drain port 13 is formed on the bottom wall of chamber 2, i.e., below the longitudinal end, with corresponding end caps for sealing. Filter cups can be installed at both the fuel filler port and the urea filler port for filtration during the filling process.

[0034] Sensor interfaces are formed on the top walls of both chamber one and chamber two. A fuel sensor interface is formed on the top wall of chamber one, where a fuel sensor 7 is installed. A urea sensor interface 5 is formed on the top wall of chamber two, where a urea sensor is installed, for purposes such as monitoring liquid level. A second mounting hole is added to the top wall of chamber two, and a vent valve 8 is fixed there, primarily for venting and air circulation. An observation window is installed on the side wall of chamber two for easy observation of the interior.

[0035] To facilitate the installation of filters and urea pumps, in this example, a concave groove 9 is formed on the side of the top wall of the box corresponding to chamber one. A filter bracket 10 for fixing the filter is fixed on the groove wall of the groove 9, and a urea pump bracket 11 for fixing the urea pump is fixed on the end face of the box corresponding to chamber two.

[0036] During use, the urea in chamber three is thawed by heating the resistance wire, and the urea in chamber two is thawed during the gradual heating process. The configuration of chamber three is improved, with the horizontal end inclined and the vertical end converging. The liquid extraction tube extends into the vertical end. In the initial stage of heating, the vertical end in chamber three is rapidly thawed due to the presence of heat-conducting strips, etc., so that the liquid extraction tube can extract it. The thawed liquid in the horizontal end cavity continuously flows into the vertical end to achieve convergence. Under the heat transfer of the heat-conducting fins, the thawed liquid on the periphery of the shell flows into the cavity through the through hole and converges to the vertical end, gradually thawing to meet the usage requirements and reducing pollutant emissions during vehicle use.

[0037] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A fuel and urea tank module, comprising a housing, wherein the housing cavity is divided into two independent chambers, chamber one for containing fuel and chamber two for containing urea, characterized in that, A manifold mechanism is provided inside the second chamber. The manifold mechanism includes a shell, heat-conducting fins, a heating resistance wire, a heat-conducting strip, and a liquid extraction tube. A sealed third chamber is formed inside the shell, and a heating resistance wire is provided inside the wall of the third chamber. The third chamber includes a horizontal end and a vertical end. The horizontal end is inclined and its lower end is connected to the vertical end. A heat-conducting strip is provided inside the chamber of the vertical end, and the end of the heat-conducting strip is connected to the wall of the vertical end. One end of the liquid extraction tube is inside the vertical end chamber, and the other end is outside the shell. Heat-conducting fins are provided on the peripheral wall corresponding to the horizontal end of the third chamber. Several through holes connected to the second chamber are provided on the peripheral wall of the third chamber.

2. The fuel urea tank module as described in claim 1, characterized in that: A groove is formed at the bottom wall of the second chamber, and the longitudinal end of the third chamber is located in the groove with a gap between its peripheral wall and the groove wall.

3. The fuel urea tank module as described in claim 2, characterized in that: A urea drain outlet is provided at the bottom wall of the groove, and an end cap for sealing is provided.

4. The fuel urea tank module as described in claim 3, characterized in that: The bottom wall of the box corresponding to the second chamber is formed with an installation hole and a sealing cover is fixed at the installation hole, and the groove is formed at the sealing cover.

5. The fuel urea tank module as described in claim 1, characterized in that: The heat-conducting fin includes a plate and ribs. The plate is spaced around the upper part of the three corresponding peripheral walls of the chamber. Ribs are spaced along the length direction on the front and back of the plate. Some through holes are located between the two plates.

6. The fuel urea tank module as described in claim 1, characterized in that: The box body is provided with through holes, the walls of adjacent through holes are connected to each other, and the wall of the through hole on the side is connected to the side wall of the box body, so that the box body cavity is divided into two independent chambers, chamber one and chamber two, by the through holes.

7. The fuel urea tank module as described in claim 1, characterized in that: A fuel filler port is provided on the top wall of chamber one, a urea filler port is provided on the top wall of chamber two, and a drain port is provided on the bottom wall of chamber one.

8. The fuel urea tank module as described in claim 7, characterized in that: Filter cups are installed at both the fuel filler port and the urea filler port.

9. The fuel urea tank module as described in claim 1, characterized in that: Sensor interfaces are provided on the top walls of both chamber one and chamber two. A fuel sensor and a urea sensor are respectively installed at the sensor interfaces. A second mounting hole is provided on the top wall of chamber two, and a vent valve is installed at the second mounting hole. An observation window is provided on the side wall of chamber two.

10. The fuel urea tank module as described in claim 1, characterized in that: A recessed groove is provided on the side of the top wall of the box corresponding to the first chamber, and a filter bracket for fixing the filter is provided on the groove wall. A urea pump bracket for fixing the urea pump is provided on the end face of the box corresponding to the second chamber.

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