A detergent storage device and a washing and caring apparatus
By using non-contact self-capacitive electrode plates to detect detergent levels, the problems of detection distortion and multi-level detection in existing technologies have been solved, achieving efficient and reliable level detection and improving the user experience.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUXI LITTLE SWAN ELECTRIC CO LTD
- Filing Date
- 2025-07-11
- Publication Date
- 2026-06-26
AI Technical Summary
In the existing technology, detergent level detection devices are prone to detection distortion or failure due to the high viscosity of detergent sticking to the float or the probe being oxidized and corroded, and they cannot achieve multi-level detection.
A non-contact liquid level detection component is adopted, which detects the liquid level by utilizing the capacitance change between the self-capacitive electrode plate and the reference ground. Multiple self-capacitive electrode plates are used to achieve multi-level detection, avoiding direct contact with detergent.
It achieves liquid level detection without mechanical moving parts, avoiding pollution and oxidation corrosion, simplifying the circuit structure, reducing hardware costs, and enabling multi-stage liquid level indication, thus improving the user experience.
Smart Images
Figure CN224412137U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of textile washing and care technology, and in particular to a detergent storage device and washing and care equipment. Background Technology
[0002] Taking a washing machine as an example, the dispenser box of a washing machine has a liquid storage chamber for storing detergent. In some related technologies, a float is used to detect the detergent level. Specifically, the float floats on the surface of the detergent and changes with the detergent level; therefore, the height of the float can reflect the liquid level. However, the float-based method is structurally complex, and if the detergent has high viscosity, it can easily stick to the float, preventing smooth movement and leading to detection distortion or failure. Furthermore, detection is only triggered when the detergent is almost finished dispensing and the float is near its endpoint. Other related technologies use a probe inserted into the liquid storage chamber, utilizing the probe's conductivity to detect changes in liquid level. However, this method involves the probe coming into contact with the detergent, which can easily lead to oxidation and corrosion, resulting in detection distortion or failure. Utility Model Content
[0003] In view of this, the present application aims to provide a detergent storage device and washing and care equipment that can detect the liquid level at multiple levels without the liquid level detection component coming into contact with the detergent.
[0004] This application provides a detergent storage device, including:
[0005] A liquid storage body has at least one liquid storage chamber for storing detergent;
[0006] A liquid level detection component is disposed on the liquid storage body and does not contact the detergent. The liquid level detection component includes a circuit board with multiple self-capacitance electrode plates disposed on the circuit board. The multiple self-capacitance electrode plates are arranged at intervals along the height direction to obtain the liquid level by measuring the capacitance between a single self-capacitance electrode plate and a reference ground.
[0007] In some implementations, the liquid level detection component is disposed within the liquid storage body.
[0008] In some implementations, the projected outlines of the plurality of self-capacitive electrode sheets in a plane perpendicular to the height direction substantially overlap.
[0009] In some embodiments, the circuit board includes a first surface and a second surface opposite in the thickness direction, the plurality of self-capacitance electrode sheets are disposed on the first surface, and the distance between the first surface and the detergent to be tested in the thickness direction away from the second surface does not exceed 7 mm.
[0010] In some embodiments, the detergent storage device includes a sleeve at least partially disposed in the liquid storage chamber, the sleeve having a slot that is not in communication with the liquid storage chamber, and the liquid level detection component being housed within the slot.
[0011] In some implementations, the outer surface of the liquid storage body is provided with a groove, the slot and the groove are connected, and the groove is used for the liquid level detection component to be inserted into the slot.
[0012] In some implementations, the slot is located on the top surface of the liquid storage body so that the liquid level detection component can be inserted into the slot along the height direction.
[0013] In some embodiments, the detergent storage device includes a filler structure that fills the slot.
[0014] In some embodiments, the slot has a first groove wall on one side along the thickness direction of the circuit board, the electrode sheet is disposed on the surface of the circuit board facing the first groove wall, and the circuit board is attached to the first groove wall.
[0015] In some implementations, the thickness of the first tank wall does not exceed 7 mm.
[0016] In some implementations, the thickness of the first tank wall does not exceed 2.5 mm.
[0017] In some embodiments, the sleeve includes an abutment portion, a gap is formed between the abutment portion and the first groove wall, and the circuit board is inserted into the gap so that the circuit board is abutted against the first groove wall by means of the holding force of the abutment portion, or the circuit board is spaced apart from the first groove wall.
[0018] In some embodiments, the slot has a second slot wall on the other side along the thickness direction of the circuit board, and the abutment includes a rib connected to the second slot wall and extending along the height direction.
[0019] In some implementations, the ferrule and the liquid reservoir are an integral structure.
[0020] This application embodiment also provides a washing and care device, including:
[0021] shell;
[0022] The detergent storage device described in any embodiment of this application is disposed within the outer casing and fixed relative to the outer casing;
[0023] A liquid pump is used to extract detergent from the storage chamber.
[0024] The detergent storage device of this application embodiment uses a non-contact liquid level detection component to detect the detergent level. Since the liquid level detection component never comes into contact with the detergent, it eliminates the effects of detergent on the liquid level component, such as contamination, oxidation, and corrosion. Furthermore, it eliminates the need for mechanical moving parts (e.g., it does not require movement like a float in the prior art), making it less prone to damage. In addition, detection is performed using a single-ended self-capacitance electrode, eliminating the need for an additional drive electrode, simplifying circuit complexity, and reducing hardware costs. The liquid level is detected simply by the change in the electric field between the self-capacitance electrode and the detergent, without relying on the conductivity of the storage body. Moreover, the self-capacitance electrode is relatively insensitive to interference from air bubbles or impurities in the detergent because it detects the overall capacitance change between the electrode and the reference ground. It can also detect multiple liquid level settings, allowing users to choose whether to add detergent to the storage chamber in advance based on the liquid level indication. Attached Figure Description
[0025] Figure 1 This is a cross-sectional view of a partial structure of a detergent storage device according to an embodiment of this application;
[0026] Figure 2 for Figure 1 A schematic diagram of the structure shown from another perspective;
[0027] Figure 3 for Figure 1 The diagram shows another view of the structure, in which the circuit board has not yet been inserted into the slot;
[0028] Figure 4 for Figure 3 A cross-sectional view along the AA direction, showing the circuit board inserted into the slot;
[0029] Figure 5 This is a simplified schematic diagram of a liquid level detection component according to an embodiment of this application.
[0030] Explanation of reference numerals in the attached figures
[0031] 1. Liquid storage body; 1a. Liquid storage chamber; 11. Top wall; 11a. Top surface; 11b. Groove; 2. Sleeve; 2a. Slot; 21. First groove wall; 22. Second groove wall; 23. Abutment part; 3. Liquid level detection component; 31. Circuit board; 32. Self-capacitance electrode plate. Detailed Implementation
[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.
[0033] The specific technical features described in the specific embodiments can be combined in any suitable manner without contradiction. For example, different combinations of specific technical features can form different embodiments and technical solutions. To avoid unnecessary repetition, the various possible combinations of the specific technical features in this utility model will not be described separately.
[0034] In the following description, the terms "first," "second," etc., are used merely to distinguish different objects and do not indicate that the objects have the sameness or relationship. It should be understood that the directional descriptions "above," "below," "outside," and "inside" refer to the orientation under normal use conditions, while "left" and "right" refer to the left and right directions shown in the corresponding diagrams, which may or may not be the left and right directions under normal use conditions.
[0035] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. "A plurality of" means two or more.
[0036] This application provides a detergent storage device. The detergent storage device includes a liquid storage body 1. Please refer to... Figure 1 , Figure 2 as well as Figure 4 The liquid storage body 1 has at least one liquid storage chamber 1a, which is used to store detergent.
[0037] The type of detergent is not limited; for example, it can be laundry liquid, fabric softener, disinfectant, perfume, etc., as long as it is in liquid form.
[0038] In some embodiments, please refer to Figure 4 The detergent storage device also includes a liquid level detection component 3, which is disposed on the liquid storage body 1 and does not come into contact with the detergent. Specifically, the liquid level detection component 3 is fixed relative to the liquid storage body 1, meaning that the two will not move relative to each other.
[0039] The liquid level detection component 3 is used to detect the liquid level of detergent in the liquid storage chamber 1a.
[0040] The number of liquid storage chambers 1a can be one or more. In the embodiments of this application, "multiple" means no less than two, and can be two or more. In embodiments where the number of liquid storage chambers 1a is multiple, the types of detergent stored in each liquid storage chamber 1a can be the same or different.
[0041] In embodiments where there are multiple liquid storage chambers 1a, each liquid storage chamber 1a may be equipped with at least one liquid level detection component 3; alternatively, only some liquid storage chambers 1a may be equipped with liquid level detection components 3, while other liquid storage chambers 1a may not be equipped with liquid level detection components 3.
[0042] For details, please refer to Figure 5 The liquid level detection component 3 includes a circuit board 31 and a plurality of self-capacitance electrode plates 32 disposed on the circuit board 31. The plurality of self-capacitance electrode plates 32 are arranged at intervals along the height direction to obtain the liquid level by measuring the capacitance between a single self-capacitance electrode plate 32 and a reference electrode.
[0043] A self-capacitance electrode refers to a single-ended self-capacitance electrode that is connected to a reference electrode. Only a single electrode needs to form a capacitance difference with the reference electrode. When the detergent level rises to the vicinity of the corresponding self-capacitance electrode, the capacitance value of the corresponding self-capacitance electrode to the reference electrode will increase. Therefore, the change in capacitance value can reflect the liquid level height, that is, the liquid level height of the detergent can be determined by detecting the change in capacitance value.
[0044] For example, the reference electrode can be the ground electrode on the circuit board 31, or, when the liquid storage body 1 is metal, the liquid storage body 1 serves as the reference electrode.
[0045] The number of self-capacitance electrode plates 32 can be two, three, four, five, or more, for example, please refer to Figure 5 C1, C2, C3, and C4.
[0046] The arrangement of multiple self-capacitance electrode plates 32 allows for the determination of multiple liquid level positions. In some implementation schemes, taking the aforementioned four self-capacitance electrode plates C1, C2, C3, and C4 as examples, analyzing the capacitance change of each self-capacitance electrode plate, or analyzing the relationship between the capacitance changes of two adjacent self-capacitance electrode plates, can yield at least four liquid level positions. Furthermore, the capacitance value of C4 when the liquid level is below position C4 differs from the capacitance value when the liquid level reaches or exceeds position C4. Based on this analysis logic, an "empty position" can also be obtained. In other words, five positions are obtained, which can be named sequentially from low to high liquid level: empty position (C4 not triggered), position one (C4 as the measuring electrode), position two (C3 as the measuring electrode), position three (C2 as the measuring electrode), and position four (C1 as the measuring electrode).
[0047] In some other implementations, if the number of self-capacitance electrode plates 32 can be two, then there can be three liquid level positions or two liquid level positions. In other words, the number of electrode plates can be determined according to the number of positions.
[0048] This level can be indicated to the user in various ways, such as through a panel on the device's exterior, or by lights or colors, to indicate the current liquid level.
[0049] In other words, the detergent storage device of this application embodiment can detect multiple liquid level settings, allowing users to choose whether to add detergent to the storage chamber 1a in advance based on the liquid level prompts, instead of only prompting when detergent is insufficient, as in the prior art. This improves the user experience. For example, the detection principle is as follows: in a single-ended reference electrode mode, the self-capacitance electrode sheet measures the reference electrode on the circuit board 31. During measurement, the circuit on the circuit board, or the external control system, can automatically switch each self-capacitance electrode sheet as the measuring electrode or as the reference electrode. For example, when C2 is used for measurement, C3 and C1 are automatically switched to the reference electrode. When C3 is used for measurement, C2 and C4 are automatically switched to the reference electrode.
[0050] It should be noted that the circuit board 31 is arranged approximately perpendicular to the horizontal plane; for example, the angle between the circuit board 31 and the horizontal plane is 80° to 100°.
[0051] The detergent storage device of this application embodiment uses a non-contact liquid level detection component 3 to detect the liquid level of the detergent. The liquid level detection component 3 never comes into contact with the detergent, thus preventing the detergent from contaminating, oxidizing, or corroding the liquid level component. In addition, it does not require mechanical moving parts (e.g., it does not need to move like a float in the prior art), making it less prone to damage.
[0052] In related technologies, detergent level detection is performed using mutual capacitance. Specifically, mutual capacitance requires paired transmitting and receiving electrodes. The transmitting electrode emits a signal, and the receiving electrode receives the signal. The transmitted and received signals need to be coupled, and the installation positions of the transmitting and receiving electrodes need to be aligned. This requires high installation accuracy and consumes a lot of power. In addition, mutual capacitance may lead to misjudgment due to local changes in the medium (such as air bubbles blocking the coupling between electrodes).
[0053] In this embodiment, detection is performed using a single-ended self-capacitance electrode sheet, eliminating the need for additional driving electrodes, thus simplifying circuit complexity and reducing hardware costs. Liquid level is detected simply by the change in electric field between the self-capacitance electrode sheet and the detergent, without relying on the conductivity of the liquid storage body. Furthermore, the self-capacitance electrode sheet is relatively insensitive to interference from bubbles or impurities in the detergent, as it detects the overall capacitance change between the electrode and the reference electrode.
[0054] In some embodiments, the liquid level detection component 3 is disposed on the outer surface of the liquid storage body 1, that is, the liquid level detection component 3 is exposed to the external environment and appearance of the detergent storage device.
[0055] In other embodiments, the liquid level detection component 3 is disposed within the liquid storage body 1. That is, the liquid level detection component 3 is not exposed to the external environment of the detergent storage device, nor does it come into contact with the detergent. Therefore, the liquid in the external environment will not come into contact with the liquid level detection component 3, reducing the probability of the liquid level detection component 3 short-circuiting or failing due to contact with liquid.
[0056] In some embodiments, the projected outlines of the plurality of self-capacitive electrode patches 32 in a plane perpendicular to the height direction (which can also be understood as a horizontal plane) substantially overlap. It should be noted that substantial overlap allows for a small amount of patching error.
[0057] In other words, the projections of the multiple self-capacitance electrode sheets 32 onto the aforementioned plane have basically the same shape, size, and position.
[0058] For example, a single self-capacitance electrode 32 is generally rectangular, and multiple self-capacitance electrode pieces 32 are arranged in a one-dimensional array along the height direction on the surface of the circuit board 31. This arrangement ensures that the self-capacitance electrode pieces 32 have the same accuracy as the liquid level rises.
[0059] In some embodiments, the circuit board includes a first surface and a second surface that are opposite in the thickness direction. That is, the first surface and the second surface are two surfaces of the circuit board that are opposite to each other. A plurality of self-capacitance electrode sheets are disposed on the first surface, and the distance between the first surface and the detergent to be tested in the thickness direction away from the second surface does not exceed 7 mm. This helps to ensure the detection distance of the self-capacitance electrode sheets.
[0060] It should be noted that some detergents, due to their high viscosity, may solidify on the surface of objects, forming a residue that adheres to the walls. This solidified detergent is not considered part of the detergent being tested.
[0061] In some embodiments, please refer to Figure 1 , Figure 2 as well as Figure 4The detergent storage device includes a sleeve 2, which is at least partially disposed in the liquid storage chamber 1a. That is, the outer surface of the sleeve 2 is in contact with the detergent.
[0062] The ferrule 2 can be completely located in the liquid storage chamber 1a, or it can be partially located in the liquid storage chamber 1a while the other part extends out of the liquid storage chamber 1a.
[0063] Card sleeve 2 has slot 2a (see reference) Figure 4 The slot 2a and the liquid storage chamber 1a are not interconnected, meaning detergent cannot enter the slot 2a. The liquid level detection component 3 is housed within the slot 2a. Thus, the liquid level detection component 3 will not come into contact with the detergent. Furthermore, the retaining sleeve 2 provides installation space and support for the liquid level detection component 3, preventing other structures from scratching it, which helps improve the reliability and lifespan of the liquid level detection component 3.
[0064] In addition, the outer surface of the sleeve 2 that comes into contact with the detergent can be made smoother, reducing the chance of detergent sticking to the outer surface of the sleeve 2.
[0065] For example, the sleeve 2 is generally flat to fit the shape of the circuit board 31 as closely as possible.
[0066] In some embodiments, the sleeve 2 and the liquid storage body 1 are separate structures. During the assembly process, the liquid level detection component 3 can be installed into the slot 2a first, and then the sleeve 2 and the liquid storage body 1 can be connected.
[0067] In some embodiments, please refer to Figures 1 to 3 The outer surface of the liquid storage body 1 is provided with a groove 11b, and the slot 2a is connected to the groove 11b. The groove 11b is used for the liquid level detection component 3 to be inserted into the slot 2a. In this embodiment, the groove 11b is set on the outer surface of the liquid storage body 1. During assembly, the liquid level detection component 3 is inserted into the slot 2a from the groove 11b. The detergent in the liquid storage chamber 1a will not enter the slot 2a, and it is also convenient for assembly. In this embodiment, the sleeve 2 and the liquid storage body 1 can be a separate structure. They are connected together first, and then the liquid level detection component 3 is inserted from the groove 11b. In this embodiment, the sleeve 2 and the liquid storage body 1 can also be a one-piece molded structure, for example, integrally injection molded.
[0068] The slot 11b can be located on the outer surface of any side of the liquid storage body 1, such as the top surface 11a, the bottom surface, or the outer peripheral surface.
[0069] For some specific embodiments, please refer to Figure 1 , Figure 2 and Figure 4The slot 11b is provided on the top surface 11a of the liquid storage body 1 so that the liquid level detection component 3 can be inserted into the slot 2a along the height direction, which facilitates assembly and also makes it easy for the sleeve 2 to be connected to the top wall 11 of the liquid storage body 1 in a generally suspended manner (see reference). Figure 4 The weight of the sleeve 2 will not create a bending moment on it, which helps improve the stress conditions of the sleeve 2. Furthermore, when the sleeve 2 and the liquid reservoir body 1 are integrally injection molded, the design of the slot 11b ensures that the draft direction of the slot 2a and the liquid reservoir body 1 is consistent, facilitating molding. The top surface 11a of the liquid reservoir body 1 can be understood as the outer surface of the top wall 11.
[0070] In some embodiments, the detergent storage device includes a filling adhesive structure (not shown) that fills the slot 2a. Specifically, when the liquid level detection component 3 is inserted into the slot 2a, a flowable adhesive is poured into the slot 2a, filling the gaps in the slot 2a and encapsulating the liquid level detection component 3. This reduces the likelihood of moisture and impurities entering the slot 2a and also serves to fix the liquid level detection component 3, reducing the likelihood of it loosening when the detergent storage device is subjected to forced vibration.
[0071] In some embodiments, please refer to Figure 4 Slot 2a is along the thickness direction of circuit board 31. Figure 4 The circuit board 31 has a first groove wall 21 on one side (in the thickness direction). The self-capacitor electrode sheet 32 is disposed on the surface of the circuit board 31 facing the first groove wall 21. The circuit board 31 abuts against the first groove wall 21, or the circuit board 31 and the first groove wall 21 are spaced apart.
[0072] When the circuit board 31 is pressed against the first groove wall 21, the self-capacitance electrode 32 can fit as close to the first groove wall 21 as possible, minimizing the detection distance between the self-capacitance electrode 32 and the detergent.
[0073] In some embodiments, the distance between the surface of the circuit board 31 facing the side of the capacitor electrode 32 and the outer surface of the first tank wall 21 (the surface in contact with the detergent) does not exceed 7 mm.
[0074] In some embodiments, the thickness of the first groove wall 21 does not exceed 7 mm, for example, it can be 0.5 mm, 1 mm, 1.5 mm, 1.8 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, etc. This thickness does not exceed the detection distance of the self-capacitance electrode sheet 32, ensuring the detection reliability of the self-capacitance electrode sheet 32.
[0075] In some embodiments, the thickness of the first tank wall 21 does not exceed 2.5 mm. For example, it can be 0.5 mm, 1 mm, 1.5 mm, 1.8 mm, 2 mm, etc. In this way, the detection distance between the self-capacitance electrode sheet 32 and the detergent can be further reduced.
[0076] For example, please refer to Figure 4 The slot 2a has a second slot wall 22 on the other side along the thickness direction of the circuit board 31. The first slot wall 21 and the second slot wall 22 are arranged at intervals in the thickness direction of the circuit board 31 and face each other.
[0077] In some embodiments, the first groove wall 21 and the second groove wall 22 may be substantially parallel. It is understood that substantially parallel means that the first groove wall 21 and the second groove wall 22 may have a moderate draft angle.
[0078] In some embodiments, please refer to Figure 3 and Figure 4 The sleeve 2 includes an abutment portion 23, with a gap formed between the abutment portion 23 and the first groove wall 21. The circuit board 31 is inserted into the gap so that the circuit board 31 is held against the first groove wall 21 by the abutment force of the abutment portion 23. For example, the abutment portion 23 can be connected to a second groove wall 22 or other groove walls. In summary, the abutment portion 23 is beneficial for limiting and initially positioning the circuit board 31. For example, in an embodiment where glue is poured into the slot 2a, after the glue is poured, the filling glue structure finally fixes the circuit board 31.
[0079] The shape of the abutment 23 is not limited; for example, it can be multiple convex hulls.
[0080] In some embodiments, the abutment portion 23 includes ribs that are connected to the second groove wall 22 and extend along the height direction. Thus, the ribs can also serve a guiding function during the insertion of the circuit board 31 into the slot 2a along the height direction.
[0081] There can be one or more ribs.
[0082] In some embodiments, the sleeve 2 and the liquid reservoir 1 are an integral structure. For example, they are integrally injection molded. This helps to improve the structural strength of the sleeve 2 and the liquid reservoir 1, prevents leakage at the junction of the sleeve 2 and the liquid reservoir 1, and also eliminates the need for assembly.
[0083] The application scenarios for detergent storage devices are not limited; they can be used in any equipment that requires the use of detergent.
[0084] This application describes an example of a detergent storage device used in a laundry and care device.
[0085] Laundry and care equipment can be clothing processing equipment, such as washing machines, washer-dryer combos (the same drum assembly can perform both washing and drying functions), washer-dryer sets (with at least two drum assemblies, one for washing and the other for drying), as well as shoe washers, dishwashers, fruit and vegetable washers, etc.
[0086] The laundry equipment includes a housing, a liquid pump, and a detergent storage device according to any embodiment of this application. The detergent storage device is disposed inside the housing and is fixed relative to the housing. That is, the detergent storage device is fixed inside the housing and cannot be pulled out by the user.
[0087] The liquid pump is used to extract detergent from the storage chamber 1a and pump the detergent to the required place, such as the mixing tank, where detergent and cleaning medium are mixed to form a detergent mixture, which is then added to the washing chamber of the washing and care equipment.
[0088] In the description of this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine different embodiments or examples described in this application, as well as features of different embodiments or examples.
[0089] The above description is merely a preferred embodiment of this application and is not intended to limit the application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.
Claims
1. A detergent storage device, characterized in that, include: A liquid storage body has at least one liquid storage chamber for storing detergent; A liquid level detection component is disposed on the liquid storage body and does not contact the detergent. The liquid level detection component includes a circuit board with multiple self-capacitance electrode plates disposed on the circuit board. The multiple self-capacitance electrode plates are arranged at intervals along the height direction to obtain the liquid level by measuring the capacitance between a single self-capacitance electrode plate and a reference ground.
2. The detergent storage device according to claim 1, characterized in that, The liquid level detection component is disposed inside the liquid storage body.
3. The detergent storage device according to claim 1, characterized in that, The projected outlines of the plurality of self-capacitance electrode sheets on a plane perpendicular to the height direction substantially overlap.
4. The detergent storage device according to claim 1, characterized in that, The circuit board includes a first surface and a second surface opposite to each other in the thickness direction. The plurality of self-capacitance electrode sheets are disposed on the first surface. The distance between the first surface and the detergent to be tested in the thickness direction away from the second surface does not exceed 7 mm.
5. The detergent storage device according to any one of claims 1-4, characterized in that, The detergent storage device includes a sleeve, which is at least partially disposed in the liquid storage chamber. The sleeve has a slot that is not in communication with the liquid storage chamber, and the liquid level detection component is housed in the slot.
6. The detergent storage device according to claim 5, characterized in that, The outer surface of the liquid storage body is provided with a groove, the slot and the groove are connected, and the groove is used for the liquid level detection component to be inserted into the slot.
7. The detergent storage device according to claim 6, characterized in that, The slot is located on the top surface of the liquid storage body so that the liquid level detection component can be inserted into the slot along the height direction.
8. The detergent storage device according to claim 5, characterized in that, The detergent storage device includes a filling adhesive structure that fills the slot.
9. The detergent storage device according to claim 5, characterized in that, The slot has a first groove wall on one side along the thickness direction of the circuit board, and the electrode sheet is disposed on the surface of the circuit board facing the first groove wall. The circuit board is attached to the first groove wall, or the circuit board is spaced apart from the first groove wall.
10. The detergent storage device according to claim 9, characterized in that, The thickness of the first groove wall does not exceed 7 mm.
11. The detergent storage device according to claim 9, characterized in that, The thickness of the first groove wall does not exceed 2.5 mm.
12. The detergent storage device according to claim 9, characterized in that, The sleeve includes an abutting portion, and a gap is formed between the abutting portion and the first groove wall. The circuit board is inserted into the gap so that the circuit board is attached to the first groove wall by means of the abutting force of the abutting portion.
13. The detergent storage device according to claim 12, characterized in that, The slot has a second groove wall on the other side along the thickness direction of the circuit board, and the abutment includes a rib that is connected to the second groove wall and extends along the height direction.
14. The detergent storage device according to claim 5, characterized in that, The ferrule and the liquid storage body are an integral structure.
15. A washing and care device, characterized in that, include: shell; The detergent storage device according to any one of claims 1-14, wherein the detergent storage device is disposed within the housing and fixed relative to the housing; A liquid pump is used to extract detergent from the storage chamber.