Fluid sensor capable of measuring concentration and liquid level, urea pump and urea box assembly

Abstract

The utility model discloses a fluid sensor, a urea pump and a urea box assembly, which can simultaneously carry out quality detection and liquid level detection, can synchronously eliminate bubbles influencing the quality detection and the liquid level detection, and comprises a concentration liquid level detection device, a first transmission pipe and a second transmission pipe, the concentration liquid level detection device comprises a concentration detection module and a liquid level detection module, the concentration detection module is provided with a transmitting and receiving surface and a reflecting surface which are opposite and separated, a detection area is formed between the transmitting and receiving surface and the reflecting surface, the top of the detection area is open, and the liquid level detection module is arranged below the bottom of the detection area and is aligned to the detection area. The liquid outlet end of the first transmission pipe is aligned to the transmitting and receiving surface, the liquid outlet end of the second transmission pipe is aligned to the reflecting surface, the liquid sprayed out of the first transmission pipe scours the transmitting and receiving surface, the liquid sprayed out of the second transmission pipe scours the reflecting surface, and part of the liquid is reflected by the transmitting and receiving surface and the reflecting surface and then is emitted to a detection area. Or the reflected liquid causes disturbance of the solution in the detection zone.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts, and in particular to a fluid sensor that can measure both concentration and liquid level, a urea pump, and a urea tank assembly. Background Technology

[0002] A urea tank is a urea storage container, also known as a urea canister. It contains urea solution and is mainly used in trucks and buses that burn diesel fuel. During operation, a urea pump sprays the urea solution from the tank into the vehicle's exhaust pipe to achieve a reaction that reduces nitrogen oxides in the diesel exhaust into nitrogen and water, thereby reducing nitrogen oxides in the engine exhaust.

[0003] The urea pump delivers urea solution through its pump body, and excess urea solution flows back into the urea tank through an overflow valve. Some urea pumps are also equipped with a quality sensor to detect the mass of the urea solution. However, because urea solution easily produces air bubbles, these bubbles can cause inaccurate detection when they flow onto the quality sensor. Existing technologies use the overflowing urea solution to flush the quality sensor, thereby eliminating air bubbles adhering to it. However, this quality sensor can only detect the mass of the urea solution and cannot simultaneously detect the urea solution level, nor can it simultaneously eliminate air bubbles that affect level detection. Utility Model Content

[0004] The first objective of this invention is to provide a fluid sensor that can simultaneously perform quality detection and liquid level detection, and can simultaneously eliminate air bubbles that affect both quality detection and liquid level detection, thus combining concentration and liquid level measurement.

[0005] The second objective of this invention is to provide a urea pump that can simultaneously perform quality inspection and liquid level detection, and can simultaneously eliminate air bubbles that affect quality inspection and liquid level detection.

[0006] The third objective of this invention is to provide a urea tank assembly that can simultaneously perform quality inspection and liquid level inspection, and can simultaneously eliminate factors affecting quality inspection and liquid level inspection.

[0007] To achieve the above objectives, the fluid sensor provided by this utility model, which combines concentration and liquid level measurement, includes a concentration and liquid level detection device, a first transmission tube, and a second transmission tube. The concentration and liquid level detection device includes a concentration detection module and a liquid level detection module. The concentration detection module has a transmitting and receiving surface and a reflecting surface that are opposite to each other and spaced apart. A detection area is formed between the transmitting and receiving surface and the reflecting surface. The top of the detection area is open. The liquid level detection module is located below the bottom of the detection area and aligned with the detection area. The liquid outlet of the first transmission tube is aligned with the transmitting and receiving surface, and the liquid outlet of the second transmission tube is aligned with the reflecting surface. The liquid ejected from the first transmission tube washes the transmitting and receiving surface, and the liquid ejected from the second transmission tube washes the reflecting surface. Some of the liquid is reflected by the transmitting and receiving surface and the reflecting surface and is directed toward the detection area, or the reflected liquid causes disturbance to the solution in the detection area.

[0008] Preferably, the concentration level detection device also includes a structural body, with a structural groove on the top of the structural body, a concentration detection module disposed in the structural groove, and a level detection module disposed below the bottom of the structural groove.

[0009] Preferably, the concentration detection module includes a concentration measuring transducer and a reflector, which are installed in the structural groove and are positioned opposite each other. The two concentration measuring transducers have a transmitting and receiving surface, and the reflector has a reflecting surface. The liquid level detection module includes a liquid level measuring transducer, which is located below the bottom of the structural groove.

[0010] Preferably, the liquid outlet ends of the first transmission tube and the second transmission tube are respectively inserted into the structural groove.

[0011] Preferably, a through hole communicating with the structural groove is provided on the periphery of the structural body, and the liquid outlet end of the first transmission pipe and the liquid outlet end of the second transmission pipe pass through the through hole and enter the structural groove.

[0012] Preferably, the liquid outlet ends of the first transmission tube and the second transmission tube are stacked one above the other in a cross-over arrangement within the structural groove.

[0013] To achieve the second objective mentioned above, this utility model also provides a urea pump, which includes a pump base, a filter screen, a pump body, and the aforementioned fluid sensor that combines concentration and liquid level measurement. The pump body is mounted on the pump base, the filter screen is mounted on the top of the pump base, the concentration and liquid level detection device is located beside the filter screen, the pump body has an overflow port, and the inlet end of the first transmission pipe and the inlet end of the second transmission pipe are respectively connected to the overflow port.

[0014] Preferably, the urea pump of this utility model further includes a three-way connector, which is installed on the top of the filter screen. One end of the three-way connector is connected to the overflow port of the pump body, and the other two ends of the three-way connector are respectively connected to the inlet end of the first transmission pipe and the inlet end of the second transmission pipe. The first transmission pipe and the second transmission pipe are bent and at least a portion is close to or near the filter screen.

[0015] Preferably, the filter screen is recessed to the side of the concentration level detection device to form a curved structure, and the top of the pump seat forms an installation space in the area directly opposite the curved structure, where the concentration level detection device is located.

[0016] To achieve the third objective mentioned above, this utility model also provides a urea tank assembly, which includes a tank body and the aforementioned urea pump, with the urea pump installed in the tank body.

[0017] Compared with existing technologies, the fluid sensor provided by this utility model, which combines concentration and liquid level measurement, includes a concentration / liquid level detection device, a first transmission tube, and a second transmission tube. The concentration / liquid level detection device includes a concentration detection module and a liquid level detection module. The concentration detection module has a transmitting / receiving surface and a reflecting surface that are opposite to each other and spaced apart, forming a detection area between them. The top of the detection area is open. The liquid level detection module is located below the bottom of the detection area and aligned with it. The liquid outlet of the first transmission tube is aligned with the transmitting / receiving surface, and the liquid outlet of the second transmission tube is aligned with the reflecting surface. The liquid ejected from the first transmission tube washes the transmitting / receiving surface, and the liquid ejected from the second transmission tube washes the reflecting surface. Some of the liquid is reflected by the transmitting / receiving surface and the reflecting surface and is directed towards the detection area, or the reflected liquid causes disturbance to the solution in the detection area. The liquid ejected from the first transmission tube washes the transmitting and receiving surfaces, impacting and dislodging air bubbles and impurities adhering to them. Similarly, the liquid ejected from the second transmission tube washes the reflecting surface, impacting and dislodging air bubbles and impurities. This ensures that the transmitting and receiving surfaces and the reflecting surface are unaffected by air bubbles and impurities, preventing them from affecting the concentration detection module's results. Furthermore, some liquid is reflected by the transmitting and receiving surfaces and directed towards the detection area, or the reflected liquid causes fluctuations in the solution within the detection area, further impacting and dispersing air bubbles and impurities, thus preventing them from affecting the liquid level detection module's results. Therefore, the fluid sensor solution of this invention effectively ensures the accuracy of data detection.

[0018] Understandably, since the urea pump of this invention includes the aforementioned fluid sensor, and the inlet ends of the first and second transmission pipes are respectively connected to the overflow port of the pump body, it effectively impacts and disperses air bubbles that affect quality detection and level detection, ensuring the accuracy of the detection, and can effectively utilize the overflowing urea solution. The urea tank assembly of this invention also has corresponding advantages. Attached Figure Description

[0019] Figure 1 This is a perspective view of the urea pump of this utility model.

[0020] Figure 2 This is a perspective view of the urea pump of this utility model when it is at another angle.

[0021] Figure 3 This is a perspective view of the urea pump of this utility model at another angle.

[0022] Figure 4 This is a cross-sectional view of the concentration of this utility model. Detailed Implementation

[0023] To explain the technical content and structural features of this utility model in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0024] like Figures 1 to 4As shown, this utility model provides a fluid sensor 100 that combines concentration and liquid level measurement, comprising a concentration / liquid level detection device 10, a first transmission tube 20, and a second transmission tube 30. The concentration / liquid level detection device 10 includes a concentration detection module 11 and a liquid level detection module 12. The concentration detection module 11 has a transmitting / receiving surface A and a reflecting surface B that are opposite to each other and spaced apart, forming a detection area 13 between them. The top of the detection area 13 is open. The liquid level detection module 12 is located below the bottom of the detection area 13 and aligned with it. The liquid outlet 01 of the first transmission tube 20 is aligned with the transmitting / receiving surface A, and the liquid outlet 02 of the second transmission tube 30 is aligned with the reflecting surface B. The liquid ejected from the first transmission tube 20 washes the transmitting / receiving surface A, and the liquid ejected from the second transmission tube 30 washes the reflecting surface B. Some of the liquid is reflected by the transmitting / receiving surface A and the reflecting surface B and is directed towards the detection area 13, or the reflected liquid causes disturbance to the solution in the detection area 13. The liquid ejected from the first transmission pipe 20 washes the transmitting and receiving surface A, impacting and dislodging air bubbles and impurities adhering to it. Similarly, the liquid ejected from the second transmission pipe 30 washes the reflecting surface B, impacting and dislodging air bubbles and impurities adhering to it. This ensures that the transmitting and receiving surface A and the reflecting surface B are unaffected by air bubbles and impurities, preventing them from affecting the detection results of the concentration detection module 11. Furthermore, some liquid is reflected by the transmitting and receiving surface A and the reflecting surface B and directed towards the detection area 13, or the reflected liquid causes fluctuations in the solution in the detection area 13, which can also impact and disperse air bubbles and impurities in the detection area 13, preventing them from affecting the detection results of the liquid level detection module 12. Thus, the technical solution using the fluid sensor 100 of this invention effectively ensures the accuracy of data detection.

[0025] like Figures 1 to 4 As shown, the concentration and level detection device 10 of this utility model also includes a structural body 14. A structural groove 141 is formed on the top of the structural body 14. The concentration detection module 11 is disposed in the structural groove 141, and the level detection module 12 is disposed below the bottom of the structural groove 141. Further, the concentration detection module 11 includes a concentration-measuring transducer 111 and a reflector 112, which are installed in the structural groove 141 and are positioned opposite each other. The concentration-measuring transducer 111 has a transmitting and receiving surface A, and the reflector 112 has a reflecting surface B. The level detection module 12 includes a level-measuring transducer 121, which is disposed below the structural groove 141. When the fluid sensor 100 is placed below the liquid surface, the liquid flows into the structural groove 141, allowing for concentration and level detection of the liquid.

[0026] like Figures 1 to 4As shown, the liquid outlet 01 of the first transmission tube 20 and the liquid outlet 02 of the second transmission tube 30 respectively penetrate into the structural groove 141. Specifically, a through hole 142 communicating with the structural groove 141 is provided on the periphery of the structural body 14. The liquid outlet 01 of the first transmission tube 20 and the liquid outlet 02 of the second transmission tube 30 respectively pass through the through hole 142 and enter the structural groove 141, close to the outer edge of the structural groove 141, to avoid interfering with the detection of the concentration detection module 11 and the liquid level detection module 12 due to excessive insertion. The through hole 142 facilitates the insertion of the liquid outlet 01 of the first transmission tube 20 and the liquid outlet 02 of the second transmission tube 30 into the structural groove 141. Preferably, to avoid interference with their respective infusions, the liquid outlet 01 of the first transmission tube 20 and the liquid outlet 02 of the second transmission tube 30 are arranged in a staggered manner, one above the other.

[0027] like Figures 1 to 4 As shown, the fluid sensor 100 of this invention, which combines concentration and liquid level measurement, can be applied to a urea pump 1000. The urea pump 1000 is part of a urea tank assembly, which also includes a tank for storing urea solution. The urea pump 1000 pumps the urea solution from the tank out. The pumped urea solution reacts with the exhaust gas from the vehicle's exhaust pipe, reducing nitrogen oxides in the diesel exhaust into nitrogen and water, thereby reducing nitrogen oxides in the engine exhaust. In fact, the fluid sensor 100 of this invention, which combines concentration and liquid level measurement, can also be used independently or applied to other devices / equipment.

[0028] This utility model's urea pump 1000 includes, in addition to the aforementioned fluid sensor 100 that combines concentration and liquid level measurement, a pump base 200, a filter screen 300, and a pump body. The pump body is mounted on the pump base 200, the filter screen 300 is mounted on top of the pump base 200, and the concentration and liquid level detection device 10 is located beside the filter screen 300. The pump body has an overflow port, and the inlet end 03 of the first transmission pipe 20 and the inlet end 04 of the second transmission pipe 30 are respectively connected to the overflow port. The pump body pumps urea solution outwards. When the outwardly transported urea solution is not completely used, the remaining urea solution flows out from the overflow port of the pump body and flows into the first transmission pipe 20 and the second transmission pipe 30. The overflowing urea solution is used to flush the transmitting and receiving surface A and the reflecting surface B, efficiently utilizing the overflowing urea solution and reducing energy waste.

[0029] like Figures 1 to 4As shown, the urea pump 1000 of this utility model also includes a bottom cover 400, which is installed on the pump base 200. The bottom cover 400 covers and protects the pump body. A power interface (not shown) and a liquid outlet connector 401 are provided on the bottom cover 400. The liquid outlet connector 401 communicates with the liquid outlet of the pump body, and the urea solution pumped by the pump body flows out from the liquid outlet connector 401. The pump body, pump base 200, filter screen 300, and bottom cover 400 adopt the design described in Chinese Patent CN20822108U. Figure 1 The structure can be arranged in this way, but it should be noted that this is only one possible structural arrangement. Other structural arrangements can also be used depending on actual needs, so it should not be limited to this.

[0030] like Figures 1 to 4 As shown, the urea pump 1000 of this utility model also includes a three-way connector 500. One end of the three-way connector 500 is connected to the overflow port of the pump body, and the other two ends of the three-way connector 500 are respectively connected to the liquid inlet end 03 of the first transmission pipe 20 and the liquid inlet end 04 of the second transmission pipe 30. The three-way connector 500 facilitates connection. The first transmission pipe 20 and the second transmission pipe 30 are bent and at least part of them are close to or close to the filter screen 300. At this time, the first transmission pipe 20 and the second transmission pipe 30 do not occupy too much space, and the structure of the urea pump 1000 is more compact.

[0031] like Figures 1 to 4 As shown, the filter screen 300 is recessed on the side facing the concentration level detection device 10 to form a curved structure 301. The top of the pump seat 200 forms an installation space 201 in the area directly opposite the curved structure 301, and the concentration level detection device 10 is installed in the installation space 201.

[0032] The above-disclosed examples are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall fall within the scope of the present utility model.

Claims

1. A fluid sensor that combines concentration measurement and liquid level measurement, characterized in that: The device includes a concentration level detection device, a first transmission tube, and a second transmission tube. The concentration level detection device includes a concentration detection module and a level detection module. The concentration detection module has a transmitting and receiving surface and a reflecting surface that are opposite to each other and separated. A detection area is formed between the transmitting and receiving surface and the reflecting surface. The top of the detection area is open. The level detection module is located below the bottom of the detection area and aligned with the detection area. The liquid outlet of the first transmission tube is aligned with the transmitting and receiving surface, and the liquid outlet of the second transmission tube is aligned with the reflecting surface. The liquid ejected from the first transmission tube washes the transmitting and receiving surface, and the liquid ejected from the second transmission tube washes the reflecting surface. Some of the liquid is reflected by the transmitting and receiving surface and the reflecting surface and is directed towards the detection area, or the reflected liquid causes disturbance to the solution in the detection area.

2. The fluid sensor that combines concentration and liquid level measurement according to claim 1, characterized in that, The concentration level detection device also includes a structural body, the top of which has a structural groove, the concentration detection module is located in the structural groove, and the level detection module is located below the bottom of the structural groove.

3. The fluid sensor that combines concentration and liquid level measurement according to claim 2, characterized in that, The concentration detection module includes a concentration measuring transducer and a reflector. The concentration measuring transducer and the reflector are installed in the structural groove and are positioned opposite each other. The concentration measuring transducer has the transmitting and receiving surface, and the reflector has the reflecting surface. The liquid level detection module includes a liquid level measuring transducer, which is located below the bottom of the structural groove.

4. The fluid sensor that combines concentration and liquid level measurement according to claim 2, characterized in that, The liquid outlet ends of the first transmission tube and the second transmission tube are respectively inserted into the groove of the structure.

5. The fluid sensor that combines concentration measurement and liquid level measurement according to claim 2, characterized in that, A through hole communicating with the structural groove is provided on the periphery of the structural body. The liquid outlet end of the first transmission tube and the liquid outlet end of the second transmission tube pass through the through hole and enter the structural groove.

6. The fluid sensor that combines concentration and liquid level measurement according to claim 2, characterized in that, The liquid outlet ends of the first transmission tube and the liquid outlet ends of the second transmission tube are arranged in an overlapping manner in the structural groove.

7. A urea pump, characterized in that, It also includes a pump base, a filter screen, a pump body, and a fluid sensor that can measure both concentration and liquid level as described in any one of claims 1-6. The pump body is mounted on the pump base, the filter screen is mounted on the top of the pump base, the concentration and liquid level detection device is located beside the filter screen, the pump body has an overflow port, and the liquid inlet end of the first transmission pipe and the liquid inlet end of the second transmission pipe are respectively connected to the overflow port.

8. The urea pump according to claim 7, characterized in that, It also includes a three-way connector, which is installed on the top of the filter screen. One end of the three-way connector is connected to the overflow port of the pump body, and the other two ends of the three-way connector are respectively connected to the liquid inlet end of the first transmission pipe and the liquid inlet end of the second transmission pipe. The first transmission pipe and the second transmission pipe are bent and at least a portion is close to or near the filter screen.

9. The urea pump according to claim 7, characterized in that, The filter screen is recessed to form a curved structure facing the side of the concentration level detection device. The top of the pump base forms an installation space in the area directly opposite the curved structure, and the concentration level detection device is located in the installation space.

10. A urea tank assembly, characterized in that, It includes a housing and a urea pump as described in any one of claims 7, 8, and 9, wherein the urea pump is mounted in the housing.

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