Liquid level sensor, control method thereof, water tank and vehicle

Abstract

The invention relates to a liquid level sensor and a control method thereof, a water tank and a vehicle, the liquid level sensor comprises an isolation shell and two first conductive parts, and the two first conductive parts are arranged in the isolation shell; wherein the isolation shell can contract or stretch under different pressures of liquid outside the isolation shell so as to drive at least one first conductive part to move relative to the other first conductive part, so that the two first conductive parts are disconnected or connected. The isolation shell shrinks or stretches under different pressures of external liquid to drive at least one of the two first conductive parts in the isolation shell to move, so that the two first conductive parts are disconnected or connected, the floater is driven without depending on the buoyancy of the liquid, the risk of clamping stagnation and false alarm of the floater is avoided, the isolation effect of the structure and the liquid is improved, and the service life of the floater is prolonged. Therefore, the measurement accuracy is improved, and the operation stability is enhanced.

Description

Technical Field

[0001] The present application relates to the technical field of liquid level detection, and in particular to a liquid level sensor and a control method thereof, a water tank and a vehicle. Background Art

[0002] A liquid level sensor is a device used to detect the height of liquid (i.e. liquid level) in a container. It is widely used in industrial process control, household goods, automobiles, and medical equipment.

[0003] In the related art, the liquid level sensor uses a float floating on the surface of the liquid to work. The float is usually mounted on a vertically extending guide column to ensure that it can move up and down along a predetermined path. As the liquid level changes, the float rises and falls accordingly, and transmits this movement to the indicator or switch device, thereby triggering a signal output to display the liquid level. However, under dynamic conditions (such as vehicle tilting, climbing a slope), the float is prone to tilting and getting stuck, or getting stuck due to impurities between it and the guide column. At this time, the indicator or switch device receives an erroneous signal and a false alarm occurs. Summary of the invention

[0004] The embodiments of the present application provide a liquid level sensor and a control method thereof, a water tank and a vehicle, which improve measurement accuracy and enhance operational stability, so as to at least partially solve the above-mentioned technical problems.

[0005] In order to achieve the above object, according to a first aspect of the present application, a liquid level sensor is provided, comprising:

[0006] an isolation housing; and

[0007] Two first conductive parts are arranged in the isolation shell;

[0008] The isolation shell can shrink or expand under different pressures of the liquid outside the isolation shell to drive at least one of the first conductive parts to move relative to another first conductive part, so that the two first conductive parts are disconnected or connected.

[0009] Optionally, the liquid level sensor further comprises an elastic reset member, wherein the elastic reset member is disposed in the isolation shell, and when the isolation shell contracts, the elastic reset member is driven to elastically deform.

[0010] Optionally, two ends of the elastic reset member are respectively connected to two opposite side walls of the isolation shell;

[0011] The two first conductive parts are respectively installed on the two side walls.

[0012] Optionally, the liquid level sensor further comprises two movable seats, the two movable seats are respectively mounted on the two side walls, and the two first conductive parts are respectively mounted on the two movable seats.

[0013] Optionally, the movable seat comprises:

[0014] a plate portion, one side of which is connected to the side wall; and

[0015] A mounting portion connected to a side of the plate portion away from the side wall;

[0016] Wherein, the first conductive part is arranged on the mounting part to move along with the movable seat.

[0017] Optionally, two ends of the elastic return member are respectively connected to the two movable seats.

[0018] Optionally, the liquid level sensor further comprises a first bracket portion, the first bracket portion is disposed in the isolation shell, the first bracket portion is provided with a slideway, and at least one of the mounting portions is slidably disposed through the slideway.

[0019] Optionally, the liquid level sensor further includes a conversion component, one end of the conversion component is connected to one of the first conductive parts, and the other end of the conversion component is connected to another of the first conductive parts.

[0020] Optionally, the two first conductive parts and the adapter both extend along the first direction, the two first conductive parts and the adapter are arranged along the second direction, and the adapter is disposed between the two first conductive parts;

[0021] The two side walls include a first side wall and a second side wall arranged opposite to each other along a first direction,

[0022] The adapter is disposed between the first side wall and the second side wall.

[0023] Two ends of one of the first conductive parts are respectively connected to the first side wall and an end of the adapter away from the first side wall.

[0024] Two ends of another first conductive portion are respectively connected to the second side wall and an end of the adapter facing away from the second side wall.

[0025] Optionally, the isolation housing has an opening, and the liquid level sensor further comprises:

[0026] A mounting seat body is provided, which covers the opening and is sealedly connected to the isolation shell, wherein the mounting seat body is provided with a channel, and the channel is communicated with the opening; and

[0027] Two second conductive parts are arranged in the channel, and the two second conductive parts are respectively connected to the two first conductive parts.

[0028] Optionally, the liquid level sensor further comprises a second bracket portion passing through the channel, the second bracket portion being provided with a slide groove, and at least one of the second conductive portions being slidably disposed in the slide groove.

[0029] According to a second aspect of the present application, a water tank is provided, comprising:

[0030] a housing; and,

[0031] The liquid level sensor as described in any of the above items is arranged in the box body.

[0032] According to a third aspect of the present application, a vehicle is provided, comprising a liquid level sensor as described in any one of the above items or a water tank as described above.

[0033] According to a fourth aspect of the present application, a control method for a liquid level sensor is provided, the liquid level sensor comprising an isolation shell and two first conductive parts, the isolation shell being capable of contracting or expanding under different pressures of liquid outside the isolation shell to drive at least one of the first conductive parts to move relative to another of the first conductive parts, so that the two first conductive parts are disconnected or connected, the control method for the liquid level sensor comprising:

[0034] Acquire states of the two first conductive parts;

[0035] When the two first conductive parts are switched from a first state to a second state, an alarm message is issued, wherein the first state includes one of being connected and being disconnected, and the second state includes the other of being connected and being disconnected.

[0036] Optionally, when the two first conductive parts switch from the first state to the second state, issuing an alarm message includes:

[0037] When the two first conductive parts are switched from a first state to a second state, obtaining a vehicle body posture;

[0038] When the vehicle body posture is normal, an alarm message is issued.

[0039] Optionally, when the two first conductive parts are switched from the first state to the second state, acquiring the vehicle body posture includes:

[0040] When the two first conductive parts are switched from the first state to the second state, obtaining a retention time length of the two first conductive parts maintaining the second state;

[0041] When the holding time reaches a preset time, the vehicle body posture is acquired.

[0042] In the embodiment of the present application, the isolation shell shrinks or stretches according to the different pressures of the external liquid, thereby driving at least one of the first conductive parts to move, so that the two first conductive parts are disconnected or connected. Since this induction method drives the first conductive part by liquid pressure, rather than relying on the buoyancy of the liquid to drive the float, the problem of float jamming false alarm is avoided, and the measurement accuracy is improved. In addition, the first conductive part is completely isolated from the external liquid by the isolation shell, protecting the first conductive part from the influence of the external liquid. Compared with the float immersed in the liquid, the isolation effect of this structure and the liquid is more ideal, providing better sealing and electrochemical safety, enhancing the stability and durability of the system, and adapting to more diverse application environments. That is, in the embodiment of the present application, the isolation shell shrinks or stretches under different pressures of the external liquid to drive at least one of the two first conductive parts located in the isolation shell to move, so that the two first conductive parts are disconnected or connected, and the float is not driven by the buoyancy of the liquid, avoiding the risk of float jamming false alarm, improving the isolation effect of the structure and the liquid, thereby improving the measurement accuracy and enhancing the operation stability.

[0043] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0045] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same figure numbers represent the same parts in the following description.

[0046] Figure 1 is a schematic structural diagram of a water tank provided in an exemplary embodiment of the present disclosure;

[0047] Figure 2 yes Figure 1 A schematic cross-sectional view of the water tank at AA when the two first conductive parts are connected;

[0048] Figure 3 yes Figure 2 A schematic diagram of the enlarged part B in FIG.

[0049] Figure 4 yes Figure 1 A schematic cross-sectional view of the water tank at AA when the two first conductive parts are disconnected;

[0050] Figure 5 yes Figure 4 A schematic diagram of the local C enlargement in FIG.

[0051] Figure 6 yes Figure 1 A schematic top view of a liquid level sensor in FIG.

[0052] Figure 7 yes Figure 6 Exploded diagram of the liquid level sensor in FIG.

[0053] Figure 8 yes Figure 7 A schematic diagram of the structure of the conductive part and the adapter;

[0054] Fig. 9 yes Figure 7 A schematic diagram of the structure of the movable seat and the inner bracket;

[0055] Fig.10 is a first flow chart of a method for controlling a liquid level sensor provided in an exemplary embodiment of the present disclosure;

[0056] Fig.11 is a second flow chart of a method for controlling a liquid level sensor provided in an exemplary embodiment of the present disclosure;

[0057] Fig.12 3 is a schematic diagram of a third flow chart of a method for controlling a liquid level sensor provided in an exemplary embodiment of the present disclosure.

[0058] Description of reference numerals:

[0059] 1000, water tank; 100, liquid level sensor; 11, isolation shell; 111, side wall; 1111, first side wall; 1112, second side wall; 112, opening; 12, mounting seat; 121, channel; 2, conductive member; 21, first conductive part; 22, second conductive part; 23, connecting part; 3, elastic reset member; 4, movable seat; 41, plate part; 42, mounting part; 5, inner bracket; 51, first bracket part; 511, slideway; 52, second bracket part; 521, slide groove; 6, adapter; 200, box body; 210, upper shell; 220, lower shell; 300, sealing ring; 400, box cover assembly; 500, plug. DETAILED DESCRIPTION

[0060] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0061] As people pay more and more attention to environmental protection and low carbon, the pace of development of new energy vehicles has also accelerated significantly. The integration of automobiles with related technologies in the fields of energy, transportation, information and communications has accelerated, and electrification, networking and intelligence have become the development trend of the automobile industry. New technologies for new energy vehicles have sprung up, for example:

[0062] The application number is CN202410658157.7, the publication number is CN118238797B, and the invention name is New Energy Vehicle Energy Intelligent Management System, Control Method and Related Equipment; the application number is CN202410672579.X, the publication number is CN118597091A, and the invention name is New Energy Vehicle Energy Intelligent Management Method, System and Related Equipment; the application number is CN202010470247.5, the publication number is CN113734146B, and the invention name is Vehicle Driving Mode Selection Method, Device, Equipment and Medium; all describe electric-based hybrid technology, which has multiple advantages such as fast, economical, quiet, smooth and green.

[0063] The application number is CN202211678720.4, the publication number is CN117382629B, and the name of the invention is vehicle power control method, device, medium, vehicle controller and vehicle; the application number is CN202311164098.X, the publication number is CN116890770B, and the name of the invention is vehicle control system, method and vehicle; the application number is CN202311170393.6, the publication number is CN117533292B, and the name of the invention is vehicle control system, control method, controller and vehicle; all describe a new energy power system with four wheel-side motors independently driven as the core, which greatly improves the safety and power of new energy vehicles.

[0064] The present application provides a liquid level sensor, Figures 1 to 5 This is a schematic diagram of the structure of a water tank provided in an embodiment of the present application, wherein the water tank includes a liquid level sensor. Figures 6 to 9 A schematic diagram of the structure of the liquid level sensor provided in an embodiment of the present application.

[0065] See Figure 1 , Figure 2 and Figure 3 The liquid level sensor 100 includes an isolation shell 11 and two first conductive parts 21, and the two first conductive parts 21 are arranged in the isolation shell 11; wherein the isolation shell 11 can shrink or stretch under different pressures of the liquid outside the isolation shell 11 to drive at least one first conductive part 21 to move relative to another first conductive part 21, so that the two first conductive parts 21 are disconnected or connected.

[0066] In the technical solution of the present application, the isolation shell 11 contracts or stretches according to the different pressures of the external liquid, thereby driving at least one of the first conductive parts 21 to move, so that the two first conductive parts 21 are disconnected or connected. Since this response method is to drive the first conductive part 21 by liquid pressure, rather than relying on the buoyancy of the liquid to drive the float, the problem of float jamming false alarm is avoided, and the measurement accuracy is improved. In addition, the first conductive part 21 is completely isolated from the external liquid by the isolation shell 11, protecting the first conductive part 21 from the influence of the external liquid. Compared with the float immersed in the liquid, the isolation effect of this structure and the liquid is more ideal, providing better sealing and electrochemical safety, enhancing the stability and durability of the system, and adapting to more diverse application environments. That is, in the technical solution of the present application, the isolation shell 11 is contracted or stretched under different pressures of the external liquid to drive at least one of the two first conductive parts 21 located in the isolation shell 11 to move, so that the two first conductive parts 21 are disconnected or connected, and the float is not driven by the buoyancy of the liquid, thereby avoiding the risk of float jamming false alarm, improving the isolation effect of the structure and the liquid, thereby improving the measurement accuracy and enhancing the operation stability.

[0067] The present application does not limit the implementation method of the isolation shell 11 being able to shrink or expand according to different liquid pressures. In some examples, the isolation shell 11 is made of an elastic deformable material. When the liquid level rises, the liquid pressure increases accordingly, which will cause the isolation shell 11 to deform and shrink due to its own elastic properties; when the liquid level decreases, the liquid pressure decreases accordingly, and the isolation shell 11 is reset and expanded by virtue of its own elasticity.

[0068] In some embodiments, see Figure 3 , Figure 4 , Figure 5 and Figure 7 , the liquid level sensor 100 further includes an elastic reset member 3, which is disposed in the isolation housing 11. When the isolation housing 11 contracts, the elastic reset member 3 is driven to elastically deform. In these embodiments, the liquid level sensor 100 further includes an elastic reset member 3 disposed in the isolation housing 11. When the isolation housing 11 contracts due to an increase in external liquid pressure (see Figure 5 ), driving the elastic reset member 3 to undergo elastic deformation (for example Figure 5 When the external pressure decreases, the elastic reset member 3 returns to its original state and pushes the isolation housing 11 to expand (see Figure 3). It is understandable that without the elastic reset member 3, the contraction and expansion of the isolation shell 11 may be irregular due to its own material properties or external interference, while the elastic reset member 3 can ensure that the amplitude and speed of each contraction or expansion of the isolation shell 11 are more consistent, making the response of the liquid level sensor 100 to the liquid level change more stable and predictable, which helps to improve the accuracy and stability of the measurement. It is also understandable that long-term changes in the liquid level will cause the isolation shell 11 to continuously contract and expand. If relying on the elasticity of the isolation shell 11 itself, after multiple cycles, fatigue damage may occur to the isolation shell 11. By using the elastic reset member 3 as the reset driving force, reset failure caused by fatigue of the isolation shell 11 material can be avoided, thereby improving the accuracy and reliability of the measurement.

[0069] In some examples, the isolation shell 11 is made of soft material and can shrink or stretch freely when the external liquid pressure changes. It does not have elastic reset capability. At this time, the built-in elastic reset element 3 becomes the only reset driving force, which ensures that the liquid level can be accurately restored to the initial state after each change, avoiding reset failure caused by material fatigue or environmental factors. Each reset process depends on the characteristics of the elastic reset element 3, ensuring the consistency and reliability of each operation and improving the repeatability of the measurement results.

[0070] In some embodiments, see Figure 3 and Figure 5, the two ends of the elastic reset member 3 are respectively connected to the two opposite side walls 111 of the isolation shell 11; the two first conductive parts 21 are respectively installed on the two side walls 111. In these embodiments, the two first conductive parts 21 are respectively installed on the two opposite side walls 111 of the isolation shell 11, and the two first conductive parts 21 can be driven and moved by the isolation shell 11, which makes the liquid level sensor 100 more comprehensive in sensing the change of the liquid level. For example, when the liquid level rises, the contraction of the isolation shell 11 will affect the two first conductive parts 21 from the two side walls 111 at the same time. This driving method of the double side walls 111 avoids the error that may be caused by sensing the change of the liquid level only from a single direction. Because if only one direction of the first conductive part 21 can be driven, the measurement may be inaccurate due to factors such as uneven distribution of liquid pressure or local deformation of the isolation shell 11. The driving of the double side walls 111 can comprehensively consider the pressure changes in different directions, so as to more accurately reflect the actual situation of the liquid level. The fact that both first conductive parts 21 can be active also means that the liquid level sensor 100 can respond to the change of the liquid level more quickly. When the liquid level changes slightly, the driving effects of the two side walls 111 can be superimposed, so that the distance or connection state between the two first conductive parts 21 changes more quickly. Compared with the case where only one first conductive part 21 can move, this structure driven by the two side walls 111 can capture the change of the liquid level in a shorter time, thereby improving the response sensitivity of the liquid level sensor 100. The two side walls 111 are respectively connected to the two ends of the elastic reset member 3, that is, the two side walls 111 can be pushed and reset by the same elastic reset member 3. In this way, only one elastic reset member 3 is required to drive the two first conductive parts 21 connected to the two opposite side walls 111 to reset, which greatly simplifies the structure of the liquid level sensor 100. There is no need to set a reset device separately for each first conductive part 21, which reduces the number of components, reduces the difficulty of manufacturing and assembly, reduces the cost, and also reduces the number of components that may fail, thereby improving the reliability of the liquid level sensor 100. In summary, by connecting the two ends of the elastic reset member 3 to the two side walls 111 of the isolation shell 11 respectively, and installing the two first conductive parts 21 on the two side walls 111 respectively, these embodiments not only improve the sensing accuracy and response speed of the liquid level sensor 100 to liquid level changes, but also greatly simplify the structure, reduce costs and improve reliability.

[0071] In some embodiments, see Figure 3 , Figure 5 , Figure 7 and Fig. 9, the liquid level sensor 100 further includes two movable seats 4, the two movable seats 4 are respectively mounted on the two side walls 111, and the two first conductive parts 21 are respectively mounted on the two movable seats 4. In these embodiments, the movable seat 4 is mounted on the side wall 111, and when the liquid level changes, the movement of the side wall 111 will be followed by the movable seat 4, and the first conductive part 21 is mounted on the movable seat 4, so that the displacement of the side wall 111 caused by the liquid level change can be transmitted to the first conductive part 21. For example, in the process of the liquid level rising, the side wall 111 will gradually shrink inward, and the movable seat 4 will move synchronously, thereby causing the first conductive part 21 mounted on the movable seat 4 to also make a corresponding position change, so that the two first conductive parts 21 are connected or disconnected, thereby reflecting the liquid level change. The first conductive part 21 is indirectly mounted on the side wall 111 through the movable seat 4. The first conductive part 21 is isolated from the side wall 111 by the movable seat 4. The movable seat 4 can be made of a material that is more favorable to the operation of the first conductive part 21. For example, a material with better insulation or thermal stability is selected to make the movable seat 4 to ensure that the first conductive part 21 works in a more ideal environment and improve its working performance and service life. During the use of the liquid level sensor 100, if a first conductive part 21 fails or needs to be replaced, only the corresponding movable seat 4 needs to be operated. Compared with the situation where the first conductive part 21 is directly mounted on the side wall 111 and there is no movable seat 4, if the first conductive part 21 is to be maintained or replaced, it may be necessary to process the entire side wall 111 structure, which will be more complicated and time-consuming. The presence of the movable seat 4 makes maintenance and replacement work more convenient, thereby reducing the overall maintenance cost of the liquid level sensor 100.

[0072] In some embodiments, see Figure 3 , Figure 5 and Fig. 9 The movable seat 4 includes a plate portion 41 and a mounting portion 42, one side of the plate portion 41 is connected to the side wall 111; the mounting portion 42 is connected to the side of the plate portion 41 away from the side wall 111; wherein the first conductive portion 21 is provided on the mounting portion 42 to move with the movable seat 4. In these embodiments, the movable seat 4 includes a plate portion 41, one side of the plate portion 41 is connected to the side wall 111, the plate portion 41 can increase the connection area with the side wall 111, better fit the shape of the side wall 111, ensure that the connection between the movable seat 4 and the side wall 111 is more stable, thereby improving the stability of the entire liquid level sensor 100 structure. When the isolation shell 11 contracts or stretches, the side wall 111 will move accordingly. Since the plate portion 41 is stably connected to the side wall 111, the plate portion 41 can accurately move with the movement of the side wall 111. The first conductive portion 21 installed on the mounting portion 42 on the side of the plate portion 41 away from the side wall 111 can move relatively stably under the drive of the plate portion 41, thereby changing the connection or disconnection relationship between the two first conductive portions 21 and accurately reflecting the liquid level situation.

[0073] In some embodiments, see Figure 3 and Figure 5 , the two ends of the elastic reset member 3 are respectively connected to two movable seats 4. In these embodiments, the two ends of the elastic reset member 3 are indirectly connected to the side wall 111 through the movable seats 4, avoiding direct contact between the elastic reset member 3 and the side wall 111. During the frequent extension and contraction of the elastic reset member 3, if it is directly connected to the side wall 111, the tension or pressure of the elastic reset member 3 may cause wear or local deformation of the side wall 111. The interval connection through the movable seats 4 can avoid scratching the surface of the side wall 111 or causing local depression of the side wall 111, protect the integrity of the side wall 111 structure, and improve the reliability and service life of the structure.

[0074] In some embodiments, see Figure 3 , Figure 5 and Fig. 9, the liquid level sensor 100 further includes a first bracket portion 51, which is disposed in the isolation shell 11, and is provided with a slideway 511, and at least one mounting portion 42 is slidably disposed in the slideway 511. In these embodiments, the first bracket portion 51 is disposed in the isolation shell 11 and is provided with a slideway 511, and the mounting portion 42 is slidably disposed in the slideway 511, which provides guidance for the movement of the first conductive portion 21. When the liquid level changes, the side wall 111 of the isolation shell 11 will move, thereby driving the movable seat 4 to move, and the mounting portion 42 on the movable seat 4 slides in the slideway 511, so that the first conductive portion 21 disposed on the mounting portion 42 can only move in the direction specified by the slideway 511, thereby avoiding unnecessary movement of the first conductive portion 21 in other directions, thereby being able to more accurately reflect the change in the liquid level. The limiting effect of the slide 511 on the mounting portion 42 can prevent the mounting portion 42 from excessive movement. If there is no limiting effect of the slide 511, in some extreme cases (such as when the liquid level suddenly changes significantly or is subjected to external impact), the mounting portion 42 may exceed the normal working range, resulting in collision or damage with other components (such as the top of the isolation shell 11). The existence of the slide 511 can limit the movement range of the mounting portion 42, protect the first conductive portion 21 and other related components, and extend the service life of the liquid level sensor 100. In some examples, both mounting portions 42 are slidably arranged on the slide 511 to provide guidance for the movement of the two mounting portions 42, thereby providing guidance for the movement of the two first conductive portions 21, avoiding unnecessary displacement of the two first conductive portions 21 in other directions, and more accurately reflecting the liquid level changes. In some examples, only one slide 511 is provided, and two mounting portions 42 are located in the same slide 511. The positional relationship of the two mounting portions 42 is relatively fixed, so that the positional relationship of the two first conductive portions 21 is relatively fixed. During calibration or maintenance, technicians can more easily determine the relative position and movement state of the two first conductive portions 21, thereby more accurately adjusting and maintaining the working parameters of the liquid level sensor 100.

[0075] In some embodiments, see Figure 3 , Figure 5 , Figure 7 and Figure 8, the liquid level sensor 100 also includes an adapter 6, one end of the adapter 6 is connected to a first conductive part 21, and the other end of the adapter 6 is connected to another first conductive part 21. In these embodiments, the use of the adapter 6 can effectively shorten the physical distance between the two first conductive parts 21, so that they can work in a more compact space. Since the adapter 6 shortens the physical distance between the two first conductive parts 21, when the isolation shell 11 contracts or stretches, the contact or disconnection action between the two first conductive parts 21 can be completed faster, thereby improving the sensor's response speed to liquid level changes. The adapter 6 provides additional connection flexibility, so that the first conductive part 21 can be adjusted according to actual installation requirements without changing the overall structural design. The presence of the adapter 6 simplifies the assembly process, allowing the first conductive part 21 to be installed and positioned in a simpler manner, reducing assembly time and difficulty.

[0076] In some embodiments, see Figure 3 and Figure 5 , the two first conductive parts 21 and the adapter 6 are both extended along the first direction, the two first conductive parts 21 and the adapter 6 are arranged along the second direction, and the adapter 6 is arranged between the two first conductive parts 21; the two side walls 111 include a first side wall 1111 and a second side wall 1112 arranged opposite to each other along the first direction, the adapter 6 is arranged between the first side wall 1111 and the second side wall 1112, and a first conductive part 21 (that is, Figure 3 and Figure 5 The two ends of the first conductive portion 21 on the left side of the middle are respectively connected to the first side wall 1111 and the end of the adapter 6 away from the first side wall 1111 (that is, Figure 3 and Figure 5 The right end of the other first conductive portion 21 (that is, Figure 3 and Figure 5 The two ends of the first conductive portion 21 on the right side of the middle are respectively connected to the second side wall 1112 and the end of the adapter 6 away from the second side wall 1112 (that is, Figure 3 and Figure 5 In these embodiments, since the two first conductive parts 21 and the adapter 6 are extended and arranged in a specific direction, and the adapter 6 is located between the two first conductive parts 21, this layout realizes efficient use of space, making the internal structure of the liquid level sensor 100 more compact, and in the limited isolation housing 11, the various components can be arranged in an orderly manner, reducing space waste, which is conducive to the miniaturization of the liquid level sensor 100.

[0077] In some embodiments, see Figure 3 and Figure 5, the isolation shell 11 has an opening 112, and the liquid level sensor 100 also includes a mounting seat body 12 and two second conductive parts 22. The mounting seat body 12 covers the opening 112 and is sealed with the isolation shell 11. The mounting seat body 12 is provided with a channel 121, and the channel 121 is connected with the opening 112; the two second conductive parts 22 are arranged in the channel 121, and the two second conductive parts 22 are respectively connected with the two first conductive parts 21. It can be understood that the isolation shell 11 can shrink or stretch under different pressures of the liquid outside the isolation shell 11, and its shape is not fixed. It may be a soft material or an elastic deformable material, which is not convenient for direct installation. The existence of the mounting seat body 12 solves this problem. The mounting seat body 12 covers the opening 112 of the isolation shell 11 and is sealed with it. The mounting seat body 12 provides a relatively stable and regular installation position for the liquid level sensor 100. For example, when the liquid level sensor 100 is installed on the equipment, the mounting seat 12 can be embedded in the preset mounting hole for fixing, so that the entire liquid level sensor 100 can be more conveniently installed on the water tank 1000 and other equipment, thereby improving the accuracy and efficiency of the installation. During the operation of the liquid level sensor 100, the connection or disconnection information of the first conductive part 21 needs to be transmitted to be used by the external device, and the second conductive part 22 can accurately transmit the state information of the first conductive part 21. For example, when the liquid level changes and causes the first conductive part 21 to be connected or disconnected, this state change will be transmitted to the circuit or control system outside the liquid level sensor 100 through the second conductive part 22, thereby realizing the monitoring and control of the liquid level information. The second conductive part 22 is arranged in the channel 121 of the mounting seat 12 and is connected to the first conductive part 21. The channel 121 provides a relatively stable conduction path for the second conductive part 22. This structure helps to ensure the integrity of the signal during the transmission process, reduce the interference of external factors on the signal, and improve the reliability of the signal transmission of the liquid level sensor 100.

[0078] In some embodiments, see Figure 3 , Figure 5 , Figure 6 and Fig. 9 The liquid level sensor 100 further includes a second bracket portion 52, which is inserted into the channel 121. The second bracket portion 52 is provided with a slide groove 521, and at least one second conductive portion 22 is slidably provided in the slide groove 521. It can be understood that the second conductive portion 22 is connected to the first conductive portion 21 and can be driven by the first conductive portion 21. The second bracket portion 52 is provided with a slide groove 521, and at least one second conductive portion 22 is slidably provided in the slide groove 521. The slide groove 521 limits the movement trajectory of the second conductive portion 22, so that the second conductive portion 22 can only slide in the slide groove 521, which helps to keep the second conductive portion 22 in the correct position inside the liquid level sensor 100, prevents it from being offset or shaking during operation, and thus ensures the normal operation of the liquid level sensor 100.

[0079] In some examples, see Figure 8 and Fig. 9 , the liquid level sensor 100 includes an inner bracket 5, the inner bracket 5 is fixedly connected to the mounting seat body 12, the inner bracket 5 includes a first bracket portion 51 and a second bracket portion 52, the first bracket portion 51 is provided with a slideway 511, the first conductive portion 21 is slidably arranged on the slideway 511, the second bracket portion 52 is provided with a slideway 521, and the second conductive portion 22 is slidably arranged on the slideway 521. In these examples, the inner bracket 5 is composed of the first bracket portion 51 and the second bracket portion 52, and this structural design realizes the coordinated work of the internal structure of the liquid level sensor 100, the first bracket portion 51 is provided with a slideway 511 for the first conductive portion 21 to slide, and the second bracket portion 52 is provided with a slideway 521 for the second conductive portion 22 to slide. The slideway 511 and the slide groove 521 respectively limit the movement trajectory of the first conductive part 21 and the second conductive part 22, which helps to prevent the first conductive part 21 and the second conductive part 22 from shifting or shaking during operation, so that they can move stably within the prescribed path, thereby ensuring the normal operation of the liquid level sensor 100 and reducing the detection error caused by component offset.

[0080] In some examples, see Figure 3 , Figure 5 , Figure 7 and Figure 8 , the liquid level sensor 100 includes a conductive member 2, the conductive member 2 includes a first conductive portion 21, a second conductive portion 22, and a connecting portion 23 connecting the first conductive portion 21 and the second conductive portion 22, the connecting portion 23 being configured to be elastically deformable, so that the first conductive portion 21 moving in the first direction can drive the second conductive portion 22 to move in the second direction through the connecting portion 23. In these examples, when the first conductive portion 21 moves in the first direction, the elastic deformation of the connecting portion 23 enables it to drive the second conductive portion 22 to move in the second direction, and the elastic deformation of the connecting portion 23 can ensure the motion conduction between the first conductive portion 21 and the second conductive portion 22, and realize the effective transmission of the liquid level change information.

[0081] According to the second aspect of this application, see Figure 1 , a water tank 1000 is provided, comprising a tank body 200 and a liquid level sensor 100, wherein the liquid level sensor 100 is disposed in the tank body 200. The structure of the liquid level sensor 100 is as described above, and since the water tank 1000 adopts all the technical solutions of all the above embodiments, it at least has the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0082] The water tank 1000 may be an expansion water tank 1000 (also referred to as an auxiliary water tank 1000 or a compensation water tank 1000), a radiator (i.e., a main water tank 1000), a windshield washer fluid tank 1000, an air conditioning condenser tank 1000, a battery cooling water tank 1000 (for electrical equipment such as electric vehicles or hybrid electric vehicles), an exhaust gas recirculation cooling water tank 1000 (i.e., an EGR cooling water tank 1000), etc., and the present disclosure does not make any specific limitations on this.

[0083] For some examples, see Figure 1 and Figure 2 The water tank 1000 is an expansion water tank 1000. The box body 200 includes an upper shell 210 and a lower shell 220. The upper shell 210 and the lower shell 220 together define a receiving cavity for receiving liquid. The liquid level sensor 100 is connected to the upper shell 210 through the mounting seat 12. A sealing ring 300 is provided between the mounting seat 12 and the inner wall of the mounting hole of the upper shell 210 to improve the sealing performance of the installation. Of course, the water tank 1000 may also include a box cover assembly 400 and a plug 500. The box cover assembly 400 is used to close the top of the box body 200 to protect the internal components and prevent external pollutants from entering. The plug 500 is used for pressure relief. This application does not make specific restrictions.

[0084] According to the third aspect of the present application, a vehicle is provided, including a liquid level sensor 100 or a water tank 1000. The structure of the liquid level sensor 100 or the water tank 1000 is as described above. Since the vehicle adopts all the technical solutions of all the above-mentioned embodiments, it at least has the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0085] The vehicle may be a fuel vehicle, a plug-in hybrid vehicle, a new energy vehicle, etc., and the present disclosure does not make any specific limitation on this.

[0086] According to the fourth aspect of the present application, a control method for a liquid level sensor 100 is provided. The specific structure of the liquid level sensor 100 can refer to the above-mentioned liquid level sensor 100, and the embodiments of the present application are not described in detail here. The liquid level sensor 100 includes an isolation shell 11 and two first conductive parts 21. The isolation shell 11 can shrink or stretch under different pressures of the liquid outside the isolation shell 11 to drive at least one first conductive part 21 to move relative to another first conductive part 21, so that the two first conductive parts 21 are disconnected or connected, that is, the isolation shell 11 shrinks or stretches under different pressures of the external liquid to drive the two first conductive parts 21 located in the isolation shell 11 to disconnect or connect, thereby avoiding the risk of float jamming and possible electrochemical reactions, improving measurement accuracy, and enhancing operational stability.

[0087] The following is a detailed description of the control method of the liquid level sensor 100. It should be noted that the order of the following embodiments is not intended to limit the preferred order of the embodiments. Figures 10 to 12 This is a flow chart of a control method of the liquid level sensor 100 provided in an embodiment of the present application. Fig.10 The specific process of the control method of the liquid level sensor 100 provided in the embodiment of the present application can be as follows:

[0088] S100: Acquiring the states of the two first conductive parts 21;

[0089] S200: When the two first conductive parts 21 are switched from a first state to a second state, an alarm message is issued, wherein the first state includes one of being connected and being disconnected, and the second state includes the other of being connected and being disconnected.

[0090] In these embodiments, the system first obtains the current state of the two first conductive parts 21. The two first conductive parts 21 have a first state and a second state. The two states can be "on" or "off". This step ensures that the system can understand the working condition of the liquid level sensor 100 in real time. When it is detected that the two first conductive parts 21 switch from one state (e.g., "on") to another state (e.g., "off"), the system will trigger an alarm message. The alarm message can be conveyed to the user or control system in a variety of ways, such as visual warnings, sound alarms, or sent to a remote monitoring system. This state switching usually means that the liquid level has changed significantly, which may be that the liquid level has risen above a set threshold or dropped to a dangerous level. For example, the rise in liquid level causes the isolation shell 11 to shrink, causing the two first conductive parts 21 to change from "off" to "on" (or from "on" to "off"), indicating that the liquid level is too high, triggering a high liquid level alarm. The drop in liquid level causes the isolation shell 11 to stretch, causing the two first conductive parts 21 to change from "on" to "off" (or from "off" to "on"), indicating that the liquid level is too low, triggering a low liquid level alarm. By monitoring the state change of the first conductive part 21 to reflect the change of the liquid level and issuing an alarm message when the state is switched, accurate monitoring of the liquid level change and timely alarm can be achieved, thereby realizing safe and effective management.

[0091] In some embodiments, see Fig.11 When the two first conductive parts 21 are switched from the first state to the second state, the step S200 of issuing an alarm message includes:

[0092] S210: when the two first conductive parts 21 are switched from the first state to the second state, obtaining the vehicle body posture;

[0093] S220: When the vehicle body posture is normal, an alarm message is issued.

[0094] In these embodiments, when the system detects that the two first conductive parts 21 switch from one state (e.g., "on") to another state (e.g., "off"), the current vehicle body posture is first obtained. This step ensures that the alarm message is issued only when the vehicle is in a normal posture, avoiding false alarms caused by vehicle tilt or dynamic operations (e.g., climbing, turning, etc.). The vehicle body posture data can be obtained through built-in posture sensors (e.g., accelerometers, gyroscopes, etc.), or through the vehicle's existing control system (e.g., electronic stability program ESP). The system determines whether the vehicle body posture is normal based on a preset posture range. For example, if the vehicle body inclination angle is within the range of ±5 degrees, the vehicle body posture is considered normal; otherwise, it is considered abnormal. Only when the vehicle body posture is confirmed to be normal will the system trigger an alarm message. This means that the change in liquid level is caused by the rise or fall of the actual liquid level, not by the change in vehicle posture. By combining the vehicle body posture data, it is ensured that the alarm message is issued only when the vehicle is in a normal posture, avoiding false alarms caused by vehicle tilt or dynamic operations, improving the accuracy of the alarm message, and improving the reliability of the system.

[0095] In some embodiments, see Fig.12 When the two first conductive parts 21 are switched from the first state to the second state, the step S210 of acquiring the vehicle body posture includes:

[0096] S211: when the two first conductive parts 21 are switched from the first state to the second state, obtaining a retention time length of the two first conductive parts 21 in the second state;

[0097] S212: When the holding time reaches a preset time, the vehicle body posture is obtained.

[0098] In these embodiments, when the two first conductive parts 21 switch from the first state to the second state, the system starts to record the length of time they remain in the second state. The system presets a reasonable retention time threshold (for example, the duration threshold is greater than or equal to 30s) to filter out short-term state switching, which may be caused by transient interference or slight shaking of the vehicle, and is not a real liquid level change. Only when the two first conductive parts 21 remain in the second state for a preset time, the system will proceed to the next step, that is, obtaining the body posture. This design reduces false alarms caused by transient interference or slight shaking, and further improves the reliability of the system. By combining the body posture data and the retention time judgment, it is ensured that the alarm information is only issued when the vehicle is in a normal posture and the state switching lasts long enough, avoiding false alarms caused by vehicle tilt or transient interference. The real cause of the liquid level change is judged more accurately, further improving the reliability of the system and user trust.

[0099] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0100] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0101] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0102] The above are only preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A liquid level sensor, characterized in that: include: Isolation housing; as well as, Two first conductive parts are arranged in the isolation shell; The isolation shell can shrink or expand under different pressures of the liquid outside the isolation shell to drive at least one of the first conductive parts to move relative to another first conductive part, so that the two first conductive parts are disconnected or connected.

2. The liquid level sensor according to claim 1, characterized in that: The liquid level sensor further comprises an elastic reset member, which is arranged in the isolation shell and drives the elastic reset member to undergo elastic deformation when the isolation shell contracts.

3. The liquid level sensor according to claim 2, characterized in that: The two ends of the elastic reset member are respectively connected to two opposite side walls of the isolation shell; The two first conductive parts are respectively installed on the two side walls.

4. The liquid level sensor according to claim 3, characterized in that: The liquid level sensor further comprises two movable seats, the two movable seats are respectively mounted on the two side walls, and the two first conductive parts are respectively mounted on the two movable seats.

5. The liquid level sensor according to claim 4, characterized in that: The movable seat comprises: a plate portion, one side of which is connected to the side wall; and A mounting portion connected to a side of the plate portion away from the side wall; Wherein, the first conductive part is arranged on the mounting part to move along with the movable seat.

6. The liquid level sensor according to claim 4, characterized in that: Two ends of the elastic return member are respectively connected to the two movable seats.

7. The liquid level sensor according to claim 5, characterized in that: The liquid level sensor further comprises a first bracket portion, the first bracket portion is arranged in the isolation shell, the first bracket portion is provided with a slideway, and at least one of the mounting portions is slidably arranged through the slideway.

8. The liquid level sensor according to claim 3, characterized in that: The liquid level sensor further includes a transfer component, one end of which is connected to one of the first conductive parts, and the other end of which is connected to another of the first conductive parts.

9. The liquid level sensor according to claim 8, characterized in that: The two first conductive parts and the adapter both extend along a first direction, the two first conductive parts and the adapter are arranged along a second direction, and the adapter is disposed between the two first conductive parts; The two side walls include a first side wall and a second side wall arranged opposite to each other along a first direction, The adapter is disposed between the first side wall and the second side wall. Two ends of one of the first conductive parts are respectively connected to the first side wall and an end of the adapter away from the first side wall. Two ends of another first conductive portion are respectively connected to the second side wall and an end of the adapter facing away from the second side wall.

10. The liquid level sensor according to claim 1, characterized in that: The isolation housing has an opening, and the liquid level sensor further comprises: A mounting seat body is provided, which covers the opening and is sealedly connected to the isolation shell, wherein the mounting seat body is provided with a channel, and the channel is communicated with the opening; and Two second conductive parts are arranged in the channel, and the two second conductive parts are respectively connected to the two first conductive parts.

11. The liquid level sensor according to claim 10, characterized in that: The liquid level sensor further comprises a second bracket portion, which is inserted into the channel. The second bracket portion is provided with a slide groove, and at least one of the second conductive portions is slidably disposed in the slide groove.

12. A water tank, characterized in that: include: a housing; and, The liquid level sensor according to any one of claims 1 to 11, wherein the liquid level sensor is disposed in the housing.

13. A vehicle, characterized in that: It comprises the liquid level sensor according to any one of claims 1 to 11 or the water tank according to claim 12.

14. A method for controlling a liquid level sensor, characterized in that: The liquid level sensor includes an isolation shell and two first conductive parts. The isolation shell can shrink or expand under different pressures of liquid outside the isolation shell to drive at least one of the first conductive parts to move relative to another first conductive part, so that the two first conductive parts are disconnected or connected. The control method of the liquid level sensor includes: Acquire states of the two first conductive parts; When the two first conductive parts are switched from a first state to a second state, an alarm message is issued, wherein the first state includes one of being connected and being disconnected, and the second state includes the other of being connected and being disconnected.

15. The control method of the liquid level sensor according to claim 14, characterized in that: When the two first conductive parts switch from the first state to the second state, the alarm information is issued including: When the two first conductive parts are switched from a first state to a second state, obtaining a vehicle body posture; When the vehicle body posture is normal, an alarm message is issued.

16. The control method of the liquid level sensor according to claim 15, characterized in that: When the two first conductive parts are switched from the first state to the second state, obtaining the vehicle body posture includes: When the two first conductive parts are switched from the first state to the second state, obtaining a retention time length of the two first conductive parts maintaining the second state; When the holding time reaches a preset time, the vehicle body posture is acquired.

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