An integrated liquid level sensor

Abstract

An integrated liquid level sensor, including upper and lower arrangement of plastic head and plastic base, one side of the plastic head is respectively provided with urea liquid suction hole, anti-freezing liquid inlet, urea liquid return port and anti-freezing liquid outlet, the lower end of the plastic head is fixedly connected with cooling water pipe, the cooling water pipe is communicated with the anti-freezing liquid inlet and the anti-freezing liquid outlet through the channel in the plastic head, one side of the plastic base is provided with 2D filter screen, the middle position between the lower plastic head and the upper plastic base is fixedly connected through the electronic tube, and the electronic tube is sleeved with the float assembly which can slide up and down.The utility model discloses a 2D filter screen is added to the lower end of the liquid suction tube, a 3D filter screen assembly is added to the urea pipe head of the liquid outlet end of the liquid suction tube, the precision of filtering impurities is increased, the liquid level sensor is conveniently arranged in the electronic tube, the quality sensor is conveniently arranged and increased in the position of the plastic base, and the range and precision of product testing are increased through overall integration.

Description

Technical Field

[0001] This utility model relates to the field of automotive urea detection technology, specifically an integrated liquid level sensor. Background Technology

[0002] Urea quality sensors are installed in the urea tank of a car. Their main purpose is to monitor the urea level, temperature, and concentration in the urea tank to ensure the quality of urea and achieve efficient treatment of vehicle exhaust. This effectively prevents environmental pollution caused by vehicle exhaust being treated with substandard urea. Most existing sensors use ultrasonic speed measurement to measure the liquid level and volume in the urea tank, but this can easily lead to inaccurate liquid level measurement when the car is in a bumpy environment.

[0003] Currently, it is usually necessary to install the suction pipe connector, return pipe connector, water pipe connector, and water shut-off solenoid valve with the plastic head one by one. The installation process is not only inconvenient and the installation layout is relatively scattered, but also has many and complex pipeline connections after installation. The existing technology has a relatively limited range of measurement categories inside the urea tank, which can only measure temperature and concentration. Utility Model Content

[0004] To address the aforementioned problems, the purpose of this invention is to provide an integrated liquid level sensor.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: an integrated liquid level sensor, comprising a plastic head and a plastic base arranged vertically. One side of the plastic head is respectively provided with a urea suction hole, an antifreeze inlet, a urea return outlet, and an antifreeze outlet. A urea pipe head integrated with a 3D filter assembly is located at the urea suction hole on the plastic head. The 2D filter assembly is located on the plastic base and connected to the plastic head via a urea suction pipe. A cooling water pipe filter assembly is located at the antifreeze inlet on the plastic head, allowing the antifreeze inlet to communicate with the internal channel of the plastic head through the cooling water pipe filter assembly. A top cover is located in the middle of the plastic head, and the top cover contains... The electrical control device is connected to the engine control module via a sensor harness. A cooling water pipe is fixedly connected to the lower end of the plastic head. The cooling water pipe is connected to the antifreeze inlet and outlet through channels inside the plastic head. A 2D filter assembly is installed on one side of the plastic base. The 2D filter assembly is fixedly connected to the plastic head via a urea suction tube, allowing the urea suction tube to connect to the urea suction hole through channels inside the plastic head. An electron tube is fixedly connected between the lower part of the plastic head and the upper part of the plastic base. A float assembly that can slide up and down is fitted on the electron tube. Stop points are set at the upper and lower ends of the electron tube, limiting the vertical floating range of the float assembly.

[0006] Furthermore, the cooling water pipe has a spiral structure, and the cooling water pipe is fixedly connected to the urea suction pipe and the quality sensor by cable ties and heat-conducting plates.

[0007] Furthermore, the 2D filter assembly is connected to the plastic head via a urea suction tube. The cavity connected to the urea suction hole on the plastic head contains a urea tubing head integrated 3D filter assembly. The outer end of the urea tubing head integrated 3D filter assembly inserted into the plastic head is locked by a urea tubing filter plug.

[0008] Furthermore, a water shut-off solenoid valve is installed at the antifreeze outlet of the plastic head. The antifreeze outlet of the plastic head is connected to the cooling water pipe through the outlet end of the water shut-off solenoid valve. The other end of the cooling water pipe is fixedly connected to the antifreeze inlet. The control end of the water shut-off solenoid valve is connected to the engine control module.

[0009] Furthermore, the plastic head and the plastic base are each equipped with a quality sensor, and the quality sensor contains a sensor wiring harness.

[0010] Furthermore, the plastic head is integrated with the urea suction hole, antifreeze inlet, and urea return port in a single unit.

[0011] Compared with the prior art, this utility model integrates a urea suction connector, an antifreeze inlet connector, and a urea return connector. The water shut-off solenoid valve is connected with screws. A 2D filter assembly is added to the lower end of the suction tube, and a 3D filter assembly is integrated into the urea pipeline head at the outlet end of the suction tube. This increases the accuracy of impurity filtration. The liquid level sensor can be easily installed inside the electron tube, and the plastic base position can be easily installed to add a quality sensor. Through overall integration, the range and accuracy of product testing are increased. Attached Figure Description

[0012] The present invention will now be further described with reference to the accompanying drawings.

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the disassembled part of this utility model. Detailed Implementation

[0014] like Figure 1-2As shown, an integrated liquid level sensor includes a plastic head 100 and a plastic base 101 arranged vertically. One side of the plastic head 100 is provided with a urea suction hole 1, an antifreeze inlet 2, a urea return outlet 3, and an antifreeze outlet 4. A urea pipeline head integrated 3D filter assembly 5 is located at the urea suction hole 1 on the plastic head 100. A 2D filter assembly 15 is located on the plastic base 101 and connected to the plastic head 100 via a urea suction pipe 14. A cooling water pipe filter assembly 6 is located at the antifreeze inlet 2 on the plastic head 100, allowing the antifreeze inlet 2 to communicate with the internal channel of the plastic head 100 through the cooling water pipe filter assembly 6. A top cover 8 is located in the middle of the plastic head 100, and an electrical control device is installed inside the top cover 8. The sensor wiring harness 9 is connected to the engine control module. The lower end of the plastic head 100 is fixedly connected to the cooling water pipe 10. The cooling water pipe 10 is connected to the antifreeze inlet 2 and the antifreeze outlet 4 through the channels inside the plastic head 100. A 2D filter assembly 15 is provided on one side of the plastic base 101. The 2D filter assembly 15 is fixedly connected to the plastic head 100 through the urea suction pipe 14, so that the urea suction pipe 14 is connected to the urea suction hole 1 through the channel inside the plastic head 100. The middle position between the lower part of the plastic head 100 and the upper part of the plastic base 101 is fixedly connected by an electron tube 16. A float assembly 11 that can slide up and down is sleeved on the electron tube 16. Stop points 12 are provided at the upper and lower ends of the electron tube 16, and the stop points 12 limit the vertical floating range of the float assembly 11.

[0015] Specifically: The cooling water pipe 10 has a spiral structure. The cooling water pipe 10 is fixedly connected to the urea suction pipe 14 and the quality sensor 13 by cable ties and heat-conducting plates. The 2D filter assembly 15 is connected to the plastic head 100 through the urea suction pipe 14. The cavity connected to the urea suction hole 1 on the plastic head 100 contains the urea pipeline head integrated 3D filter assembly 5. The outer end of the urea pipeline head integrated 3D filter assembly 5 inserted into the plastic head 100 is locked by the urea pipeline filter plug 202. The plastic head 100 is located at the antifreeze outlet 4. A water shut-off solenoid valve 7 is installed at the location. The antifreeze outlet 4 of the plastic head 100 is connected to the cooling water pipe 10 through the outlet end of the water shut-off solenoid valve 7. The other end of the cooling water pipe 10 is fixedly connected to the antifreeze inlet 2. The control end of the water shut-off solenoid valve 7 is connected to the engine control module. The plastic head 100 and the plastic base 101 are respectively equipped with quality sensors 13. The quality sensors 13 are equipped with sensor wiring harnesses. The plastic head 100, urea suction hole 1, antifreeze inlet 2, and urea return port 3 are integrated into one piece.

[0016] The working principle of this utility model is as follows: This utility model is installed inside the urea tank to monitor the concentration, level, and temperature parameters of the automotive urea solution in real time. During operation, the urea solution passes through the urea solution filter, the urea solution suction tube, the 3D filter assembly integrated at the head of the urea pipeline, and is drawn out through the urea solution outlet. When the urea solution needs to be heated, antifreeze enters from the antifreeze inlet and passes through the heating spiral tube to heat the urea solution in the urea tank. The concentration, level, and temperature of the urea solution are integrated into a quality sensor on a plastic base. The signal and power lines are connected to the outside world through the sensor harness. The accuracy of measuring the concentration, level, and temperature of the urea solution is achieved through ultrasonic principles.

[0017] The above description is merely an illustrative embodiment of this utility model and is not intended to limit the scope of this utility model. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of this utility model should fall within the protection scope of this utility model.

Claims

1. An integrated liquid level sensor comprising a plastic head (100) and a plastic base (101) arranged in a top-bottom manner, characterized in that: A urea suction hole (1), an antifreeze inlet (2), a urea return outlet (3), and an antifreeze outlet (4) are respectively provided on one side of the plastic head (100). A urea pipeline head integrated 3D filter assembly (5) is provided at the urea suction hole (1) of the plastic head (100). The 2D filter assembly (15) is located on the plastic base (101) and is connected to the plastic head (100) through the urea liquid suction pipe (14). A cooling water pipe filter assembly (6) is provided at the antifreeze inlet (2) of the plastic head (100), so that the antifreeze inlet (2) is connected to the internal channel of the plastic head (100) through the cooling water pipe filter assembly (6). A top cover (8) is provided in the middle of the plastic head (100). An electrical control device is provided inside the top cover (8). The electrical control device is connected to the engine control module through the sensor wiring harness (9). A cooling water pipe (10) is fixedly connected to the lower end of the plastic head (100). The cooling water pipe (10) is connected to the antifreeze inlet (2) and the antifreeze outlet (4) through the channel inside the plastic head (100). A 2D filter assembly (15) is provided on one side of the plastic base (101). The 2D filter assembly (15) is fixedly connected to the plastic head (100) through the urea suction pipe (14). The urea suction pipe (14) is connected to the urea suction hole (1) through the channel inside the plastic head (100). The middle position between the lower part of the plastic head (100) and the upper part of the plastic base (101) is fixedly connected by an electron tube (16). A float assembly (11) that can slide up and down is fitted on the electron tube (16). Stop points (12) are provided at the upper and lower ends of the electron tube (16). The stop points (12) limit the up and down floating range of the float assembly (11).

2. The integrated liquid level sensor as described in claim 1, characterized in that: The cooling water pipe (10) has a spiral structure. The cooling water pipe (10) is fixedly connected to the urea suction pipe (14) and the quality sensor (13) by cable ties and heat-conducting plates.

3. An integrated liquid level sensor as claimed in claim 1, characterized in that: The 2D filter assembly (15) is connected to the plastic head (100) through the urea suction tube (14). The cavity connected to the urea suction hole (1) on the plastic head (100) contains the urea pipeline head integrated 3D filter assembly (5). The outer end of the urea pipeline head integrated 3D filter assembly (5) inserted into the plastic head (100) is locked by the urea pipeline filter plug (202).

4. An integrated liquid level sensor as defined in claim 1, wherein: The plastic head (100) is equipped with a water shut-off solenoid valve (7) at the antifreeze outlet (4). The antifreeze outlet (4) of the plastic head (100) is connected to the cooling water pipe (10) through the outlet end of the water shut-off solenoid valve (7). The other end of the cooling water pipe (10) is fixedly connected to the antifreeze inlet (2). The control end of the water shut-off solenoid valve (7) is connected to the engine control module.

5. An integrated liquid level sensor as defined in claim 1, wherein: The plastic head (100) and the plastic base (101) are respectively equipped with quality sensors (13), and the quality sensors (13) are equipped with sensor wire harnesses.

6. An integrated liquid level sensor as described in claim 1, characterized in that: The plastic head (100) is integrated with the urea suction hole (1), the antifreeze inlet (2), and the urea return port (3).

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