Integrated liquid level sensor

Abstract

The utility model discloses an integrated liquid level sensor which comprises a base and an integrated seat, a urea liquid outlet, a cooling liquid inlet, a urea liquid return port and a cooling liquid outlet are formed in the top of the base, an integrated filter element is installed at the position, located at the urea liquid outlet, of the base, and an electromagnetic valve is installed at the position, located at the cooling liquid outlet, of the base. A heating pipe is mounted at the bottom end of the base, a wire harness mounting pipe is mounted between the base and the integrated seat, a sensor wire harness is arranged in the wire harness mounting pipe, a filtering assembly is mounted on one side of the integrated seat, and the filtering assembly is connected with the base through a urea liquid suction pipe; the base comprises a base plate, the base plate is provided with a concentration measuring cover and a liquid level height measuring guide pipe, the base is detachably provided with a metal blocking piece at the position of the concentration measuring cover, and the bottom end of the base plate is provided with a first ultrasonic transducer and a second ultrasonic transducer. According to the utility model, various parameters in the urea box can be detected.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid level sensors, in particular to an integrated liquid level sensor. Background Art

[0002] Liquid concentration is a physical quantity that characterizes the proportion of solvent in a solution and is one of the important parameters for describing liquids. At present, the methods for determining solution concentration are divided into two categories: chemical methods and physical methods.

[0003] The existing publication number CN215931752U discloses a high-precision urea concentration quality sensor, which includes a hexagonal shell, a round shell, a small water tank, a large water tank, and a pagoda. The characteristics are that the hexagonal shell and the round shell are integral shells made of stainless steel. There are water tanks of different sizes on the side of the round shell. A piezoelectric crystal is bonded at the bottom C of the hexagonal shell to form an ultrasonic sensor, and a temperature sensor is provided. The distance between point C and point D on the bottom of the round shell is the sound distance of the ultrasonic wave. The pagoda is connected to the ultrasonic metering module, the single-chip computer, and the display module by a signal line. The propagation speed in the urea liquid is calculated by the time difference between the ultrasonic sensor receiving and sending signals, and the temperature compensation calculation is performed by the temperature sensor. The single-chip computer converts the accurate concentration value of the urea liquid according to the different sound speeds of the ultrasonic wave in the urea liquid.

[0004] The existing technology has a relatively simple measurement category for the inside of the urea tank, which can only measure temperature and concentration. In order to improve the measurement category, we propose an integrated liquid level sensor. Utility Model Content

[0005] The utility model aims to provide an integrated liquid level sensor to solve the problems in the prior art.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an integrated liquid level sensor, comprising a base and an integrated base, wherein a urea liquid outlet, a coolant inlet, a urea return port and a coolant outlet are arranged on the top of the base, an integrated filter element is installed at the urea liquid outlet of the base, and a solenoid valve is installed at the coolant outlet of the base; a heating tube is installed at the bottom end of the base, a wiring harness installation tube is installed between the base and the integrated base, a sensor wiring harness is arranged in the wiring harness installation tube, a filter assembly is installed on one side of the integrated base, and the filter assembly is connected to the base through a urea liquid suction tube; the base comprises a substrate, a concentration measurement cover and a liquid level height measurement conduit are installed on the substrate, a metal baffle is detachably installed at the concentration measurement cover of the base, and a first ultrasonic transducer and a second ultrasonic transducer are installed at the bottom end of the substrate.

[0007] Preferably, the bottom of the heating tube is a spiral structure, and the heating tube and the urea liquid suction tube are fixed by a clamping sleeve.

[0008] Preferably, an exhaust hole is provided on the top of the concentration measurement cover.

[0009] Preferably, the substrate and the concentration measurement cover are provided with card slots, and the metal baffle can be detachably inserted into the card slots.

[0010] Preferably, the substrate is mounted with a temperature sensor, and the substrate is mounted with a wire tube connected to the wiring harness mounting tube.

[0011] Compared with the prior art, the utility model has the following beneficial effects: the sensor is installed in the urea tank to detect the concentration, liquid level and temperature parameters of the vehicle urea solution in real time. When working, the urea solution passes through the urea liquid filter and the urea liquid suction pipe and is sucked out through the urea liquid outlet; when the urea liquid needs to be heated, the coolant passes through the coolant inlet and the heating spiral tube to heat the urea liquid in the urea tank; the concentration, liquid level and temperature of the urea solution are integrated in the sensor seat at the bottom, and the signal and power lines are connected to the sensor harness through the sensor harness installation pipeline and the outside world; the application can realize the detection of various parameters inside the urea tank.

[0012] The liquid level is measured using the principle of ultrasonic reflection. The ultrasonic transducer is installed on an integrated body structure at the bottom. The liquid level is measured by emitting ultrasonic waves to the liquid surface and measuring the ultrasonic reflection time. The ultrasonic transducer for measuring liquid concentration, the reflective baffle, the temperature sensor, the controller and the transducer for measuring the liquid level are all integrated in the bottom integrated module of the sensor. The advantages of high integration are small size, flexible layout and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 This utility model Figure 1 A schematic diagram of the structure from another perspective;

[0016] Figure 3 It is a structural schematic diagram of the utility model at the wiring harness installation tube and the urea liquid suction tube;

[0017] Figure 4 It is a structural schematic diagram of the integrated seat of the utility model;

[0018] Figure 5 It is a structural schematic diagram of the utility model from the bottom perspective of the integrated seat.

[0019] In the figure: 1. base; 2. solenoid valve; 3. integrated filter element; 4. urea liquid outlet; 5. coolant inlet; 6. urea return port; 7. sensor harness; 8. coolant outlet; 9. harness mounting tube; 10. heating tube; 11. integrated seat; 12. urea liquid suction tube; 13. filter assembly; 101. substrate; 102. temperature sensor; 103. wire tube; 104. concentration measurement cover; 105. exhaust hole; 106. metal baffle; 107. liquid level height measurement conduit; 108. first ultrasonic transducer; 109. second ultrasonic transducer. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is claimed, but merely represents selected embodiments of the utility model.

[0021] See also Figure 1-3 In the embodiment of the utility model, an integrated liquid level sensor includes a base 1 and an integrated seat 11, wherein the top of the base 1 is provided with a urea liquid outlet 4, a coolant inlet 5, a urea return port 6 and a coolant outlet 8, wherein the base 1 is provided with an integrated filter element 3 at the urea liquid outlet 4, and the base 1 is provided with a solenoid valve 2 at the coolant outlet 8; a heating tube 10 is provided at the bottom end of the base 1, wherein the bottom of the heating tube 10 is a spiral structure, and the heating tube 10 and the urea liquid suction tube 12 are fixed by a ferrule; a wiring harness installation tube 9 is provided between the base 1 and the integrated seat 11, and a sensor wire is provided in the wiring harness installation tube 9 A filter assembly 13 (filter screen) is installed on one side of the integrated seat 11, and the filter assembly 13 is connected to the base 1 through a urea liquid suction pipe 12; the sensor is installed in the urea tank to detect the concentration, liquid level and temperature parameters of the vehicle urea solution in real time. When working, the urea solution passes through the urea liquid filter screen and the urea liquid suction pipe and is sucked out through the urea liquid outlet; when the urea liquid needs to be heated, the coolant is heated from the coolant inlet through the heating spiral tube to heat the urea liquid in the urea tank; the concentration, liquid level and temperature of the urea solution are integrated in the sensor seat at the bottom, and the signal and power lines are connected to the sensor harness through the sensor harness installation pipeline and the outside world.

[0022] like Figure 1 ,4 , 5; the base 1 includes a substrate 101 and a controller, the substrate 101 is equipped with a concentration measurement cover 104 and a liquid level height measurement conduit 107, the base 1 is located at the concentration measurement cover 104 and is detachably equipped with a metal baffle 106, the bottom of the substrate 101 is equipped with a first ultrasonic transducer 108 and a second ultrasonic transducer 109; the top of the concentration measurement cover 104 is provided with an exhaust hole 105, the substrate 101 and the concentration measurement cover 104 are provided with a card slot, the metal baffle 106 is detachably inserted into the card slot, the base The board 101 is installed with a temperature sensor 102, and the base plate 101 is installed with a wire tube 103 connected to the harness mounting tube 9; the ultrasonic reflection principle is adopted to measure the liquid level height, and the ultrasonic transducer is installed on an integrated main body structure at the bottom. The liquid level height is measured by emitting ultrasonic waves to the liquid surface and measuring the ultrasonic reflection time; the ultrasonic transducer for measuring the liquid concentration, the reflective baffle, the temperature sensor, the controller and the transducer for measuring the liquid level height are all integrated on the bottom integrated module of the sensor; the advantages of high integration are small size, flexible layout and low cost.

[0023] The working principle of the utility model is as follows: the sensor is installed in the urea tank to detect the concentration, liquid level and temperature parameters of the vehicle urea solution in real time. When working, the urea solution passes through the urea liquid filter screen and the urea liquid suction pipe and is sucked out through the urea liquid outlet; when the urea liquid needs to be heated, the coolant passes through the coolant inlet and the heating spiral tube to heat the urea liquid in the urea tank; the concentration, liquid level and temperature of the urea solution are integrated in the sensor seat at the bottom, and the signal and power lines are connected to the sensor harness through the sensor harness installation pipeline and the outside world; the ultrasonic reflection principle is adopted to measure the liquid level, and the ultrasonic transducer is installed on an integrated main body structure at the bottom, and the liquid level is measured by emitting ultrasonic waves to the liquid surface and measuring the ultrasonic reflection time.

[0024] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An integrated liquid level sensor, comprising a base (1) and an integrated seat (11), characterized in that: The top of the base (1) is provided with a urea liquid outlet (4), a coolant inlet (5), a urea liquid return port (6) and a coolant outlet (8); the base (1) is provided with an integrated filter element (3) at the urea liquid outlet (4); the base (1) is provided with a solenoid valve (2) at the coolant outlet (8); a heating tube (10) is provided at the bottom of the base (1); a wiring harness installation tube (9) is provided between the base (1) and the integrated base (11); a sensor wiring harness (7) is provided in the wiring harness installation tube (9); and the integrated base (11) is provided with a heating tube (10) at the bottom of the base (1); A filter assembly (13) is installed on one side of (11), and the filter assembly (13) is connected to the base (1) through a urea liquid suction tube (12); the base (1) comprises a substrate (101), and the substrate (101) is installed with a concentration measurement cover (104) and a liquid level height measurement conduit (107); a metal baffle (106) is detachably installed at the concentration measurement cover (104) of the base (1), and a first ultrasonic transducer (108) and a second ultrasonic transducer (109) are installed at the bottom end of the substrate (101).

2. The integrated liquid level sensor according to claim 1, characterized in that: The bottom of the heating tube (10) is a spiral structure, and the heating tube (10) and the urea liquid suction tube (12) are fixed by a clamping sleeve.

3. The integrated liquid level sensor according to claim 1, characterized in that: An exhaust hole (105) is provided on the top of the concentration measurement cover (104).

4. The integrated liquid level sensor according to claim 1, characterized in that: The base plate (101) and the concentration measurement cover (104) are provided with card slots, and the metal blocking sheet (106) can be detachably inserted into the card slots.

5. The integrated liquid level sensor according to claim 1, characterized in that: The substrate (101) is installed with a temperature sensor (102), and the substrate (101) is installed with a wire tube (103) connected to the wire harness installation tube (9).

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