A liquid level detection assembly

Abstract

The application provides a liquid level measuring assembly, and relates to the field of intelligent electrical appliances.The liquid level measuring assembly comprises a water storage cavity, a pressure-sensitive assembly and a limiting recess.The limiting recess is arranged on the bottom wall of the water storage cavity, and the pressure-sensitive assembly is arranged on the limiting recess.The pressure-sensitive assembly and the limiting recess are in sealed connection, and the pressure-sensitive assembly can generate different movement strokes with the change of the liquid level in the water storage cavity.The inner cavity of an isolation cavity is arranged at intervals with the inner cavity of the water storage cavity.A pressure sensing device is arranged in the isolation cavity.The pressure-sensitive assembly is coupled with the pressure sensing device.Under different movement strokes, the pressure-sensitive assembly transmits different forces to the pressure sensing device.In this way, the pressure-sensitive assembly can convert the change of the liquid level into different movement strokes and transmit different forces to the pressure sensing device, so that the effective detection of the slight change of the liquid level can be realized, thereby significantly improving the sensitivity and accuracy of the liquid level measurement.

Description

Technical Field

[0001] This utility model relates to the field of intelligent electrical appliance technology, and in particular to a liquid level detection component. Background Technology

[0002] In existing kitchen appliances, a removable water tank is commonly found to store water needed for cooking or cleaning. Current technology primarily relies on liquid level measurement methods, such as capacitive level detection, to detect the remaining water level in the tank. However, this method often fails to achieve ideal detection accuracy when the water tank is low, especially in flat water tanks. Due to the limited overall height of the tank, minute changes in the liquid level are difficult to accurately detect, leading to significant deviations in the measurement results of remaining water or used water.

[0003] Existing capacitive liquid level detection schemes typically rely on the relative distance between two electrode plates. However, this relative distance is easily affected by assembly tolerances and manufacturing processes, leading to insufficient measurement consistency. This problem is even more pronounced for flat water tanks, resulting in poor stability and reliability of the detection results. Utility Model Content

[0004] The purpose of this invention is to address at least one of the aforementioned existing technical problems by providing a liquid level detection component. By sealing and installing a pressure-sensitive component on a limiting recess, the pressure-sensitive component can generate different movement strokes according to the minute changes in the liquid level in the water storage cavity, and transmit the force to the pressure sensing device in the isolation cavity, thereby accurately converting the liquid level change into a pressure signal and realizing precise detection of the liquid level.

[0005] This utility model provides a liquid level detection component, the liquid level detection component comprising: A water storage cavity includes a pressure-sensitive component and a limiting recess. The limiting recess is disposed on the bottom wall of the water storage cavity, and the pressure-sensitive component is disposed on the limiting recess. The pressure-sensitive component and the limiting recess are sealed together. The pressure-sensitive component can generate different movement strokes according to the liquid level change in the water storage cavity. An isolation chamber, wherein the inner cavity of the isolation chamber is spaced apart from the inner cavity of the water storage chamber; The pressure sensing device is installed in the isolation cavity. The pressure-sensitive component is coupled to the pressure sensing device. Under different strokes, the pressure-sensitive component transmits different forces to the pressure sensing device.

[0006] In a possible implementation, when the liquid level in the water storage cavity reaches the maximum level, there is a gap between the pressure-sensitive component and the limiting recess.

[0007] In a possible implementation, the pressure-sensitive component includes a load-bearing part and a force-transmitting part connected in sequence. The force-transmitting part is connected to the pressure sensing device. The load-bearing part has a load-bearing surface facing the liquid being measured, and the major diameter of the load-bearing surface is larger than the major diameter of the force-transmitting part.

[0008] In a possible implementation, the liquid level detection component further includes a flexible diaphragm, which is fixedly connected to the bottom of the water storage cavity and is located between the pressure-sensitive component and the liquid being measured.

[0009] In a possible implementation, the liquid level detection assembly further includes a seal, through which the pressure-sensitive assembly is sealed to the limiting recess.

[0010] In a possible implementation, the pressure-sensitive component and the seal are integrally formed.

[0011] In a possible implementation, the isolation cavity further includes a pressure balancing hole, which is disposed through the side wall of the isolation cavity.

[0012] In a possible implementation, the pressure balancing orifice satisfies at least one of the following characteristics: The diameter of the pressure balancing hole is less than or equal to 0.2 mm; The number of pressure balancing holes is less than or equal to 5; The spacing between adjacent pressure balancing holes is greater than or equal to 5 mm.

[0013] In a possible implementation, the isolation cavity is disposed at the bottom of the water storage cavity, or the isolation cavity is embedded in the water storage cavity.

[0014] In a possible implementation, the isolation chamber is further provided with a control device and a wireless communication device, the control device being electrically connected to the pressure sensing device and the wireless communication device, respectively.

[0015] The liquid level detection component provided by this utility model has the following beneficial effects: This invention provides a liquid level detection component, comprising: a water storage cavity, including a pressure-sensitive component and a limiting recess, the limiting recess being disposed on the bottom wall of the water storage cavity, the pressure-sensitive component being disposed on the limiting recess, and the pressure-sensitive component and the limiting recess being sealed together; the pressure-sensitive component being able to generate different movement strokes according to changes in the liquid level in the water storage cavity; an isolation cavity, the inner cavity of the isolation cavity being spaced apart from the inner cavity of the water storage cavity; and a pressure sensing device disposed within the isolation cavity, the pressure-sensitive component being coupled to the pressure sensing device, the pressure-sensitive component transmitting different forces to the pressure sensing device under different movement strokes. Thus, the pressure-sensitive component can convert changes in liquid level into different movement strokes and transmit different magnitudes of force to the pressure sensing device, enabling effective detection of minute changes in liquid level, thereby significantly improving the sensitivity and accuracy of liquid level measurement. Attached Figure Description To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a side view of the liquid level detection component in an embodiment of this utility model; Figure 2 This is a side view of the liquid level detection component in an embodiment of this utility model; Figure 3 This is a top view of the liquid level detection component in an embodiment of this utility model; Figure 4 This is a side view of the liquid level detection component in an embodiment of this utility model; Figure 5 This is a side view of the liquid level detection component in an embodiment of this utility model; Figure 6 This is a side view of the liquid level detection component in an embodiment of this utility model.

[0017] The following is supplementary explanation of the attached figures: 1. Water storage chamber; 11. Pressure-sensitive component; 12. Limiting recess; 13. Sealing element; 2. Isolation chamber; 21. Air pressure balance hole; 3. Pressure sensing device; 4. Control device; 5. Wireless communication device. Detailed Implementation

[0018] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] The term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of this application. In the description of this application, it should be understood that the terms "upper," "lower," "top," "bottom," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," etc., are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein.

[0020] Understandably, kitchen appliances such as steam ovens and coffee makers are typically equipped with removable water tanks to store water and provide steam or hot water during operation. As kitchen appliances tend towards miniaturization and flattened designs, the height of these water tanks is often very low, for example, only tens of millimeters. In such flat water tanks, even a small change in water level corresponds to a significant change in water volume. Therefore, a high-precision liquid level detection method is needed to ensure accurate monitoring of remaining or used water. However, existing liquid level detection methods have certain limitations when applied to flat water tanks.

[0021] Specifically, the accuracy of traditional capacitive and conductivity-based liquid level detection methods is limited by the height of the water tank. When the water tank is short, changes in liquid level are often less than the detection resolution, making it impossible to accurately reflect level fluctuations at the 0.1mm level, and consequently, impossible to accurately monitor changes in water volume on the order of approximately 10g. Some existing capacitive measurement solutions exhibit significant errors in measurement stability, with the most stable level height differences often exceeding 10mm. For flat water tanks with a maximum liquid level of only about 50mm, this is almost insufficient for precise detection. Capacitive level detection requires electrodes on both sides of the water tank, and the spacing between them is easily affected by assembly tolerances, structural deformation, or mechanical displacement after long-term use, leading to significant deviations in measurement results and making it difficult to guarantee measurement consistency and repeatability.

[0022] like Figures 1-3 As shown, this application provides a liquid level detection component, which includes: The water storage cavity 1 includes a pressure-sensitive component 11 and a limiting recess 12. The limiting recess 12 is disposed on the bottom wall of the water storage cavity 1, and the pressure-sensitive component 11 is disposed on the limiting recess 12. The pressure-sensitive component 11 and the limiting recess 12 are sealed together. The pressure-sensitive component 11 can generate different movement strokes according to the liquid level change in the water storage cavity 1. The isolation chamber 2 is separated from the inner cavity of the water storage chamber 1. The pressure sensing device 3 is installed inside the isolation cavity 2. The pressure-sensitive component 11 is coupled to the pressure sensing device 3. Under different strokes, the pressure-sensitive component 11 transmits different forces to the pressure sensing device 3.

[0023] By setting a limiting recess 12 on the bottom wall of the water storage cavity 1 and sealing the pressure-sensitive component 11 on the limiting recess 12, the pressure-sensitive component 11 can generate different movement strokes according to the change of liquid level in the water storage cavity 1, and transmit different magnitudes of force to the pressure sensing device 3 in the isolation cavity 2 through the movement stroke, realizing the efficient conversion of liquid level signal to pressure signal, and improving the stability and reliability of liquid level measurement.

[0024] In one embodiment, the water storage cavity 1 is a closed cavity structure, and an annular limiting recess 12 is formed in the bottom wall of the water storage cavity 1. The inner diameter of the limiting recess 12 matches the outer diameter of the pressure-sensitive component 11. The pressure-sensitive component 11 is installed above the limiting recess 12. Under the action of liquid pressure, the pressure-sensitive component 11 can produce a small displacement along the axial direction of the pressure-sensitive component 11, that is, the pressure-sensitive component 11 can produce different movement strokes. The movement stroke is positively correlated with the liquid level height in the water storage cavity 1.

[0025] Specifically, the limiting recess 12 and the pressure-sensitive component 11 are both located in the middle of the bottom wall of the water storage cavity 1.

[0026] In one embodiment, the inner cavity of the isolation chamber 2 is isolated from the inner cavity of the water storage chamber 1, and the isolation chamber 2 does not contact the liquid. The lower end face of the pressure-sensitive component 11 extends into the isolation chamber 2. The pressure-sensitive component 11 is in contact with or indirectly coupled to the pressure sensing device 3 disposed within the isolation chamber 2. When the liquid level rises, the pressure-sensitive component 11 moves towards the pressure sensor and applies a force to the pressure sensing device 3. At different liquid levels, the movement stroke of the pressure-sensitive component 11 is different, thus the magnitude of the force transmitted to the pressure sensing device 3 is different. The pressure sensing device 3 converts the applied force into an electrical signal output to calculate the liquid level of the measured liquid.

[0027] In one embodiment, the load-bearing surface of the pressure-sensitive component 11 is coplanar with the bottom wall of the water storage cavity 1; in another embodiment, the load-bearing surface of the pressure-sensitive component 11 protrudes relative to the bottom wall of the water storage cavity 1.

[0028] In another embodiment, the isolation chamber 2 is fixedly installed at the bottom of the water storage chamber 1, and an air pressure balance hole 21 is provided on the side wall of the isolation chamber 2 to keep the air pressure inside and outside the chamber consistent, so as to ensure the sensitivity of the pressure-sensitive component 11 and the stability of the force transmission process.

[0029] Specifically, the range m of a pressure sensing device 3 is:

[0030] Where S is the area of ​​the load-bearing surface. The density of water, =1000 kg / m 3 Where g is the gravitational acceleration constant, g = 9.8 m / s² 2 h is the maximum liquid level height of the water storage cavity 1, a is the safety margin coefficient, a≥1, and in this embodiment, a=150%.

[0031] Specifically, the pressure sensing device 3 has a number of divisions of not less than 1000. The number of divisions refers to the smallest number of resolvable units that the pressure sensing device 3 can be divided into within the range. The smallest change that the liquid level detection can distinguish is dm = a * h / 1000, where a = 150% and h is the maximum liquid level height of the water storage cavity.

[0032] Furthermore, when the liquid level in the water storage chamber 1 reaches its maximum, a gap exists between the pressure-sensitive component 11 and the limiting recess 12. Thus, when the liquid level is too high, the liquid will not exert pressure on the pressure-sensitive component 11, preventing damage due to excessive force. Simultaneously, it ensures that the pressure-sensitive component 11 remains movable throughout the entire liquid level detection range, facilitating accurate correspondence between liquid level changes and movement stroke, and improving the detection sensitivity and measurement accuracy for minute changes in liquid level.

[0033] In one embodiment, the depth of the limiting recess 12 is greater than the travel height of the pressure-sensitive component 11. When the liquid level in the water storage cavity 1 reaches the highest liquid level, there is a preset gap between the bottom of the pressure-sensitive component 11 and the limiting recess 12.

[0034] In one embodiment, the bottom surface of the limiting recess 12 is 0.1 mm to 1 mm away from the bearing position of the pressure-sensitive component 11.

[0035] Furthermore, the pressure-sensitive component 11 includes a load-bearing part and a force-transmitting part connected in sequence. The force-transmitting part is connected to the pressure sensing device 3. The load-bearing part has a load-bearing surface facing the liquid being measured, and the major diameter of the load-bearing surface is larger than the major diameter of the force-transmitting part. The load-bearing part can provide a larger force-bearing area to evenly bear the pressure from the liquid, avoiding damage to the pressure-sensitive component 11 caused by local stress concentration. At the same time, it amplifies and stably transmits the liquid pressure to the force-transmitting part, which then accurately transmits it to the pressure sensing device 3. This achieves a sensitive response to changes in liquid level and improves detection accuracy, ensuring the reliability of the structure and the accuracy of liquid level measurement.

[0036] Specifically, the load-bearing part and the force-transmitting part form a T-shaped structure, which are integrally molded. The load-bearing part forms a load-bearing surface facing the liquid being measured, and the diameter of the load-bearing surface is larger than the diameter of the force-transmitting part. This provides a larger force-bearing area when subjected to liquid pressure and concentrates the liquid pressure to the force-transmitting part. The lower end face of the force-transmitting part abuts against the sensing surface of the pressure sensing device 3.

[0037] In another embodiment, the load-bearing part and the force-transmitting part are fixedly connected, the load-bearing part is made of rigid plastic, and the force-transmitting part is a metal rod.

[0038] In one embodiment, the limiting recess 12 includes a guide through hole, the major diameter of the load-bearing surface is larger than the diameter of the guide through hole, and the major diameter of the force transmission part is smaller than the diameter of the guide through hole.

[0039] Furthermore, the liquid level detection component also includes a flexible diaphragm, which is fixedly connected to the bottom of the water storage cavity 1 and located between the pressure-sensitive component 11 and the liquid being measured. Under the pressure of the liquid being measured, the flexible diaphragm deforms and uniformly transmits the liquid pressure to the pressure-sensitive component 11, thereby preventing direct contact between the liquid and the pressure-sensitive component 11, which could cause corrosion, contamination, or fluctuation interference. This improves the protection and stability of the device, while ensuring that the pressure-sensitive component 11 can respond sensitively and accurately to changes in liquid level.

[0040] In one embodiment, the flexible diaphragm is made of a corrosion-resistant sheet material, and the edge of the flexible diaphragm is fixedly connected to the bottom of the water storage cavity 1 by means of fasteners or pressure rings, so that the flexible diaphragm covers the pressure-sensitive component 11 and seals with the water storage cavity 1.

[0041] Optionally, the flexible diaphragm is a silicone rubber diaphragm, a polytetrafluoroethylene diaphragm, or a polyurethane film.

[0042] In another embodiment, the edge of the flexible diaphragm is embedded in a pre-set annular groove at the bottom of the water storage cavity 1 and fixed to the water storage cavity 1 by means of sealant or hot pressing, thereby forming a continuous isolation barrier, so that the liquid being tested only acts on the surface of the flexible diaphragm. The flexible diaphragm deforms under pressure and transmits the force evenly to the pressure-sensitive component 11.

[0043] In another embodiment, a flexible diaphragm is embedded in the bottom of the water storage cavity 1.

[0044] Furthermore, the liquid level detection assembly also includes a seal 13, through which the pressure-sensitive assembly 11 is sealed to the limiting recess 12. Thus, the seal 13 effectively prevents liquid leakage from the water storage chamber 1 into the isolation chamber 2, avoiding damage or interference to the pressure sensing device 3. Simultaneously, it ensures a stable and reliable force transmission path for the pressure-sensitive assembly 11 during liquid level changes, thereby improving the sealing performance, stability, and measurement accuracy of the liquid level detection, and extending the service life of the device.

[0045] In one embodiment, the sealing element 13 is an annular rubber ring or a silicone gasket. The sealing element 13 is sleeved on the outer peripheral edge of the pressure-sensitive component 11. During installation, the pressure-sensitive component 11 is embedded in the limiting recess 12 through the sealing element 13. The sealing element 13 is interference-fitted with the inner wall of the limiting recess 12.

[0046] In another embodiment, the sealing element 13 is an O-ring. The sealing element 13 is disposed in the annular groove of the limiting recess 12. When the pressure-sensitive component 11 is pressed into the limiting recess 12, the O-ring is squeezed and deformed and fills the sealing gap, thereby realizing the sealing connection between the pressure-sensitive component 11 and the limiting recess 12.

[0047] In one embodiment, the pressure-sensitive component 11 and the seal 13 are integrally formed. This integrally formed pressure-sensitive component 11 and seal 13 reduces the number of parts, avoids leakage problems caused by gaps or looseness in the assembly between the pressure-sensitive component 11 and the seal 13, thereby improving overall sealing performance and reliability, reducing production costs and assembly errors, and ensuring the stability of the force transmission process.

[0048] In one embodiment, the pressure-sensitive component 11 and the seal 13 are integrally formed by injection molding.

[0049] Optionally, the pressure-sensitive component 11 and the seal 13 are made of silicone rubber, polyurethane or thermoplastic elastomer.

[0050] In another embodiment, the pressure-sensitive component 11 is made of a metallic material, such as stainless steel.

[0051] Furthermore, the isolation chamber 2 also includes a pressure balancing hole 21, which is disposed through the side wall of the isolation chamber 2. In this way, the pressure balancing hole 21 can maintain the pressure balance inside and outside the isolation chamber 2, avoiding the pressure difference caused by the sealing of the chamber from interfering with the movement stroke and pressure transmission process of the pressure-sensitive component 11, thereby ensuring that the pressure-sensitive component 11 can respond sensitively and accurately to changes in liquid level, and improving the stability and accuracy of liquid level measurement.

[0052] In one embodiment, the sidewall of the isolation cavity 2 is made of metal or engineering plastic material, and at least one through-hole 21 is formed on the sidewall of the isolation cavity 2 after molding by micro-drilling, laser drilling or precision injection molding.

[0053] In another embodiment, a plurality of pressure balancing holes 21 are provided on the side wall of the isolation cavity 2, and the plurality of pressure balancing holes 21 are arranged at equal intervals along the circumferential direction on the side wall of the isolation cavity 2.

[0054] Specifically, the pressure balancing orifice 21 satisfies at least one of the following characteristics: The diameter of the air pressure balance hole 21 is less than or equal to 0.2 mm; The number of air pressure balance holes 21 is less than or equal to 5; The spacing between adjacent pressure balance holes 21 is greater than or equal to 5 mm.

[0055] In this way, the pressure balance hole 21 can effectively restrict liquid or impurities from entering the isolation chamber 2 through the pressure balance hole 21 while achieving pressure balance inside and outside the isolation chamber 2, avoiding contamination or damage to the pressure sensing device 3, and ensuring the sealing and reliability of the device; at the same time, by controlling the hole diameter, number of holes and spacing, the stability and measurement accuracy of the pressure-sensitive component 11 in the liquid level detection process are further ensured.

[0056] Specifically, during the processing of the isolation cavity 2, through holes with a diameter of less than or equal to 0.2 mm are formed on the side wall of the isolation cavity 2 by micro-drilling, laser drilling or precision punching, so that air can flow smoothly to maintain the air pressure balance inside and outside the isolation cavity 2, but at the same time, liquid molecules cannot pass through, thus preventing liquid from seeping into the isolation cavity 2.

[0057] Specifically, there are 1 to 5 pressure balancing holes 21 on the side wall of the isolation chamber 2 to avoid reducing the sealing performance or weakening the strength of the isolation chamber 2 due to too many openings. The pressure balancing holes 21 are symmetrically arranged or evenly distributed.

[0058] Specifically, the spacing between adjacent pressure balance holes 21 is greater than or equal to 5 mm to prevent the side walls of the isolation cavity 2 from becoming too densely packed, while ensuring that the airflow channels are distributed in a dispersed manner.

[0059] Furthermore, the isolation chamber 2 is located at the bottom of the water storage chamber 1, or the isolation chamber 2 is embedded in the water storage chamber 1. In this way, the isolation chamber 2 can be arranged close to the liquid stress area, thereby ensuring that the pressure-sensitive component 11 can transmit the liquid pressure to the pressure sensing device 3 in a timely and stable manner when the liquid level changes, thus improving the sensitivity and accuracy of liquid level detection.

[0060] In one embodiment, such as Figure 2 As shown, the isolation cavity 2 is embedded in the water storage cavity 1, and the bottom wall of the isolation cavity 2 and the bottom wall of the water storage cavity 1 are coplanar.

[0061] In another embodiment, such as Figure 4 As shown, the isolation chamber 2 is located at the bottom edge of the water storage chamber 1, and the isolation chamber 2 is fixedly connected to the bottom wall of the water storage chamber 1.

[0062] In another embodiment, such as Figure 5 As shown, the isolation chamber 2 is located at the bottom center of the water storage chamber 1, and the isolation chamber 2 is fixedly connected to the bottom wall of the water storage chamber 1.

[0063] Furthermore, such as Figure 6 As shown, the isolation chamber 2 is also equipped with a control device 4 and a wireless communication device 5. The control device 4 is electrically connected to the pressure sensing device 3 and the wireless communication device 5, respectively. In this way, the control device 4 can process the liquid level signal collected by the pressure sensing device 3 in real time and transmit the processed result to an external terminal through the wireless communication device 5, thereby realizing wireless remote monitoring and management of liquid level data, reducing wiring requirements and improving installation convenience.

[0064] Specifically, the wireless communication device 5 includes an NFC controller and an NFC coil, the control device 4 includes a microprocessor, a storage unit and a power management module, the pressure sensing device 3 is used to convert the force transmitted by the pressure-sensitive component 11 into an electrical signal and output it to the control device 4, the control device 4 analyzes and processes the electrical signal and generates liquid level data, and the pressure sensing device 3, the control device 4, the NFC controller and the NFC coil are electrically connected in sequence.

[0065] In one embodiment, the NFC controller and NFC coil can be replaced by an RFID module, an energy-harvesting Bluetooth module, or the like.

[0066] In another embodiment, the NFC controller and NFC coil can also be a WiFi module, a LoRa module, a Bluetooth module, etc.

[0067] The working process of the liquid level detection component in this application embodiment is described below with reference to a specific application scenario: First, liquid is injected into the water storage chamber 1. When the liquid level rises, the pressure-sensitive component 11 generates a corresponding movement stroke under the action of liquid pressure. The size of the movement stroke changes with the liquid level height. Secondly, the force transmission part of the pressure-sensitive component 11 is coupled to the pressure sensing device 3 in the isolation chamber 2. As the stroke changes, the pressure-sensitive component 11 transmits different liquid level pressures to the pressure sensing device 3. Then, after receiving the liquid level pressure, the pressure sensing device 3 converts the liquid level pressure into an electrical signal and outputs it to the control device 4.

[0068] Finally, the control device 4 digitizes the electrical signal and sends the liquid level height value corresponding to the liquid level pressure to the terminal via the wireless communication device 5, thereby realizing remote reading and management of the liquid level height.

[0069] The following describes specific embodiments of this application based on the above technical solution.

[0070] Example 1 Please see Figure 1-3 This embodiment provides a liquid level detection component, which includes: The water storage cavity 1 includes a pressure-sensitive component 11 and a limiting recess 12. The limiting recess 12 is disposed on the bottom wall of the water storage cavity 1, and the pressure-sensitive component 11 is disposed on the limiting recess 12. The pressure-sensitive component 11 and the limiting recess 12 are sealed together. The pressure-sensitive component 11 can generate different movement strokes according to the liquid level change in the water storage cavity 1. The isolation chamber 2 is separated from the inner cavity of the water storage chamber 1. The pressure sensing device 3 is installed inside the isolation cavity 2. The pressure-sensitive component 11 is coupled to the pressure sensing device 3. Under different strokes, the pressure-sensitive component 11 transmits different forces to the pressure sensing device 3.

[0071] The isolation chamber 2 is embedded in the water storage chamber 1. When the liquid level in the water storage chamber 1 reaches its maximum level, a gap exists between the pressure-sensitive component 11 and the limiting recess 12. The liquid level detection component also includes a sealing element 13, through which the pressure-sensitive component 11 is sealed to the limiting recess 12. The pressure-sensitive component 11 and the sealing element 13 are integrally formed. The isolation chamber 2 also includes a pressure balancing hole 21, which is disposed through the side wall of the isolation chamber 2. The diameter of the pressure balancing hole 21 is less than or equal to 0.2 mm; the number of pressure balancing holes 21 is less than or equal to 5; and the spacing between adjacent pressure balancing holes 21 is greater than or equal to 5 mm.

[0072] The isolation chamber 2 is also equipped with a control device 4 and a wireless communication device 5. The control device 4 is electrically connected to the pressure sensing device 3 and the wireless communication device 5, respectively.

[0073] Example 2 like Figure 4 As shown, the commonalities between Embodiment 2 and Embodiment 1 will not be repeated here. The isolation chamber 2 is located at the bottom of the water storage chamber 1.

[0074] Example 3 The similarities between Example 3 and Example 1 will not be repeated here. The liquid level detection component also includes a flexible diaphragm, which is fixedly connected to the bottom of the water storage cavity 1 and is located between the pressure-sensitive component 11 and the liquid being measured.

[0075] The above-disclosed embodiments are merely several 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 still fall within the scope of the present utility model.

Claims

1. A liquid level detection assembly, characterized by, The liquid level detection component includes: The water storage cavity (1) includes a pressure-sensitive component (11) and a limiting recess (12). The limiting recess (12) is disposed on the bottom wall of the water storage cavity (1), and the pressure-sensitive component (11) is disposed on the limiting recess (12). The pressure-sensitive component (11) and the limiting recess (12) are sealed together. The pressure-sensitive component (11) can generate different movement strokes according to the liquid level change in the water storage cavity (1). An isolation cavity (2) is provided with its inner cavity spaced apart from the inner cavity of the water storage cavity (1); The pressure sensing device (3) is installed in the isolation cavity (2). The pressure-sensitive component (11) is coupled to the pressure sensing device (3). Under different strokes, the pressure-sensitive component (11) transmits different forces to the pressure sensing device (3).

2. The liquid level detection assembly of claim 1, wherein, When the liquid level in the water storage cavity (1) reaches the highest liquid level, there is a gap between the pressure-sensitive component (11) and the limiting recess (12).

3. The liquid level detection component according to claim 1, characterized in that, The pressure-sensitive component (11) includes a load-bearing part and a force-transmitting part connected in sequence. The force-transmitting part is connected to the pressure sensing device (3). The load-bearing part has a load-bearing surface facing the liquid being measured. The major diameter of the load-bearing surface is larger than the major diameter of the force-transmitting part.

4. The liquid level detection component according to any one of claims 1-3, characterized in that, The liquid level detection component also includes a flexible diaphragm, which is fixedly connected to the bottom of the water storage cavity (1) and is located between the pressure-sensitive component (11) and the liquid being measured.

5. The liquid level detection component according to any one of claims 1-3, characterized in that, The liquid level detection assembly also includes a seal (13), and the pressure-sensitive assembly (11) is sealed to the limiting recess (12) through the seal (13).

6. The liquid level detection component according to claim 5, characterized in that, The pressure-sensitive component (11) and the seal (13) are integrally formed.

7. The liquid level detection component according to any one of claims 1-3, characterized in that, The isolation chamber (2) also includes a pressure balance hole (21), which is disposed through the side wall of the isolation chamber (2).

8. The liquid level detection component according to claim 7, characterized in that, The pressure balancing orifice (21) satisfies at least one of the following characteristics: The diameter of the pressure balancing hole (21) is less than or equal to 0.2 mm; The number of the pressure balancing holes (21) is less than or equal to 5; The spacing between adjacent pressure balancing holes (21) is greater than or equal to 5 mm.

9. The liquid level detection component according to any one of claims 1-3, characterized in that, The isolation cavity (2) is located at the bottom of the water storage cavity (1), or the isolation cavity (2) is embedded in the water storage cavity (1).

10. The liquid level detection component according to any one of claims 1-3, characterized in that, The isolation cavity (2) is also equipped with a control device (4) and a wireless communication device (5), and the control device (4) is electrically connected to the pressure sensing device (3) and the wireless communication device (5) respectively.

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