A water storage device

Abstract

The embodiment of the present invention relates to the field of daily necessities and discloses a water storage device. In the embodiment of the present invention, the water storage device includes: a cup body, a sleeve, a capacitance detection chip, and a controller connected to the capacitance detection chip; a plurality of sensing capacitor bars are provided on the outer wall of the cup body, the sensing capacitor bars extend along the circumference of the cup body, and the plurality of sensing capacitor bars are arranged in sequence along the height direction of the cup body; the sleeve encloses the cup body, and a reference capacitor bar is provided on the outer wall of the sleeve, and the reference capacitor bar extends along the circumference of the sleeve; the sensing capacitor bar and the reference capacitor bar are both electrically connected to the capacitance detection chip, and the capacitance detection chip is used to detect the detection capacitance value of each of the plurality of sensing capacitor bars and the reference capacitance value of the reference capacitor bar; the controller is used to output prompt information used to represent the current water level based on the detection capacitance value and the reference capacitance value. The water storage device provided by the present invention can realize automatic detection of the water level, improve convenience, and ensure the accuracy of water level detection.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of daily necessities, and in particular to a water storage device. Background Art

[0002] Water storage devices are essential for daily life, but most currently available water storage devices are simply containers for water, with relatively limited functionality. As living standards improve, people's expectations for quality of life are becoming increasingly demanding, and traditional water storage devices are no longer able to meet these needs. For example, to make tea, people need to precisely control the amount of water in a water storage device. Conventional methods typically involve simply opening the lid of a cup and observing the water level directly from the cup's opening.

[0003] The inventors have found that there are at least the following problems in the prior art: the method of observing the water level by opening the lid is inconvenient to operate, and the water level can only be estimated by human eyes, which is not very accurate. Summary of the Invention

[0004] The purpose of the embodiments of the present invention is to provide a water storage device that can realize automatic detection of the water level in the water storage device, improve convenience, and ensure the accuracy of water level detection.

[0005] In order to solve the above technical problems, an embodiment of the present invention provides a water storage device, including: a cup body, a sleeve, a capacitance detection chip, and a controller connected to the capacitance detection chip; a plurality of induction capacitor bars are provided on the outer wall of the cup body, the induction capacitor bars extend along the circumference of the cup body, and the plurality of induction capacitor bars are arranged in sequence along the height direction of the cup body; the sleeve sleeves the cup body therein, and a reference capacitor bar is provided on the outer wall of the sleeve, the reference capacitor bar extends along the circumference of the sleeve; the induction capacitor bar and the reference capacitor bar are both electrically connected to the capacitance detection chip, and the capacitance detection chip is used to detect the detection capacitance value of each of the plurality of induction capacitor bars and the reference capacitance value of the reference capacitor bar, and send them to the controller; the controller is used to output prompt information for representing the current water level based on the detection capacitance value and the reference capacitance value.

[0006] Compared with the prior art, the embodiments of the present invention are characterized in that a plurality of sensing capacitor bars are provided on the outer wall of the cup body, the sensing capacitor bars extend along the circumference of the cup body, and the plurality of sensing capacitor bars are arranged in sequence along the height direction of the cup body; the sleeve encloses the cup body; a reference capacitor bar is provided on the outer wall of the sleeve, the reference capacitor bar extends along the circumference of the sleeve; the capacitance detection chip is used to detect the detection capacitance value of each of the plurality of sensing capacitor bars and the reference capacitance value of the reference capacitor bar; the controller is used to output prompt information representing the current water level based on the detection capacitance value and the reference capacitance value, thereby realizing automatic detection of the water level in the water storage device and improving convenience; at the same time, since the change in the reference capacitance value reflects the change in the sensing capacitance value caused by environmental factors (for example, factors such as water vapor attached between the cup body and the sleeve), the reference capacitance value detected by the reference capacitor bar is comprehensively considered in the process of obtaining the water level, which can eliminate errors caused by the external environment and ensure the accuracy of water level detection.

[0007] In addition, multiple auxiliary capacitor bars are installed on the outer wall of the cup body and are electrically connected to the capacitance detection chip. The auxiliary capacitor bars are arranged in pairs with the sensing capacitor bars, and the auxiliary capacitor bars and the sensing capacitor bars in each pair are equal in height. The water level is determined to have reached that height only when a pair of capacitor bars of equal height simultaneously meet the condition. This avoids misjudgments caused by tilting the water storage device and further improves the accuracy of water level detection.

[0008] In addition, an auxiliary capacitor bar is provided on the outer wall of the cup body, electrically connected to the capacitance detection chip; the auxiliary capacitor bar is equal in height to the largest sensing capacitor bar. By providing only the largest sensing capacitor bar with a matching auxiliary capacitor bar (i.e., equal in height), the largest sensing capacitor bar and the auxiliary capacitor bar can be used to simultaneously determine whether the water storage device is full of water. This allows accurate determination of water fullness, allowing tea to be brewed when the water is full, while also avoiding the problem of excessive costs caused by the provision of too many auxiliary capacitor bars.

[0009] In addition, the sleeve is provided with at least one mounting groove, and the inductive capacitor strip is accommodated in the mounting groove.

[0010] In addition, the device further comprises a housing mounted on the sleeve, wherein the capacitance detection chip is electrically connected to the housing. This arrangement can prevent the influence of external metal on the detection capacitance value and the reference capacitance value, thereby improving the accuracy of detection.

[0011] The cup body also includes a water outlet groove, and the cup body includes a first side proximate to the water outlet groove and a second side radially opposite to the first side, with the sensing capacitor bar and / or the reference capacitor bar located on the second side. This arrangement prevents tea leaves from adhering to the sidewalls where the sensing capacitor bar and / or the reference capacitor bar are located when pouring tea, thereby affecting detection accuracy.

[0012] In addition, in the height direction of the cup body, the reference capacitor bar is located below the plurality of sensing capacitor bars and is aligned with the plurality of sensing capacitor bars.

[0013] In addition, there are two inductive capacitor bars, one of which is located at half the height of the cup body, and the other of which is located at two-thirds the height of the cup body.

[0014] In addition, the capacitance detection chip is located between the cup body and the sleeve. The water storage device also includes: a groove extending through the wall of the sleeve, and a conductive portion connecting the reference capacitor strip and the capacitance detection chip; the groove includes a first sidewall for attaching the conductive portion; the sleeve includes an outer wall and an inner wall disposed opposite each other, the first sidewall connecting the outer wall and the inner wall, and forming an obtuse angle with the outer wall. Because the first sidewall is used for attaching the conductive portion and forms an obtuse angle with the outer wall, it facilitates the attachment of the conductive portion, extends the service life of the reference capacitor strip, and reduces the risk of the reference capacitor strip falling off.

[0015] In addition, the sensing capacitor strip is fixed to the outer wall of the cup body, and / or the reference capacitor strip is fixed to the outer wall of the sleeve via adhesive. The thickness of the adhesive is 0.08 mm to 0.12 mm. This configuration ensures the adhesive's stickiness while avoiding the problem of excessive adhesive thickness causing large detection errors in the sensing capacitor strip or the reference capacitor strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0017] Figure 1 is a schematic structural diagram of a water storage device with the outer shell removed provided by the first embodiment of the present invention;

[0018] Figure 2 It is a structural schematic diagram of the water storage device provided by the second embodiment of the present invention, with the outer shell and the sleeve removed. DETAILED DESCRIPTION

[0019] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, each embodiment of the present invention will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will appreciate that in each embodiment of the present invention, many technical details are provided to help readers better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in the present application can still be implemented.

[0020] The first embodiment of the present invention relates to a water storage device, such as Figure 1 As shown, it includes: a cup body 11, a sleeve 12, a capacitance detection chip 13, and a controller 14 connected to the capacitance detection chip 13; a plurality of induction capacitor bars 15 are provided on the outer wall of the cup body 11, the induction capacitor bars 15 extend along the circumference of the cup body 11, and the plurality of induction capacitor bars 15 are arranged in sequence along the height direction of the cup body 11; the sleeve 12 sleeves the cup body 11 inside, and a reference capacitor bar 16 is provided on the outer wall 121 of the sleeve 12, and the reference capacitor bar 16 extends along the circumference of the sleeve 12; the induction capacitor bars 15 and the reference capacitor bar 16 are both electrically connected to the capacitance detection chip 13, and the capacitance detection chip 13 is used to detect the detection capacitance value of each of the plurality of induction capacitor bars 15 and the reference capacitance value of the reference capacitor bar 16, and send them to the controller 14; the controller 14 is used to output prompt information for representing the current water level according to the detection capacitance value and the reference capacitance value.

[0021] Specifically, the capacitance detection chip 13 is located between the cup body 11 and the sleeve 12. The water storage device may also include: a groove running through the wall of the sleeve 12, and a conductive portion connecting the reference capacitor bar 16 and the capacitance detection chip 13; the groove includes a first side wall 17 for attaching the conductive portion, and the sleeve 12 includes an outer wall 121 and an inner wall arranged opposite each other. The first side wall 17 connects the outer wall 121 and the inner wall, and the angle between the first side wall 17 and the outer wall 121 is an obtuse angle. Because the first side wall 17 is used for attaching the conductive portion and the angle between the first side wall 17 and the outer wall 121 is an obtuse angle, it is conducive to the attachment of the conductive portion, extending the service life of the reference capacitor bar 16, and reducing the risk of the reference capacitor bar 16 falling off.

[0022] Optionally, at least one mounting groove 18 may be provided on the sleeve 12, and the mounting groove 18 extends through the side wall of the sleeve 12. Optionally, the number of mounting grooves 18 is the same as the number of sensing capacitor bars 15, and each sensing capacitor bar 15 is accommodated in one mounting groove 18. Of course, multiple sensing capacitor bars 15 may also be accommodated in one mounting groove 18, which is not limited here. This arrangement avoids the problem of an excessively large gap between the sleeve 12 and the cup body 11 due to reserved space for installing the sensing capacitor bar 15. At the same time, the sleeve 12 can be first placed on the cup body 11, and then the sensing capacitor bar 15 can be installed in the mounting groove 18 and attached to the cup body 11, making assembly more convenient.

[0023] It is understandable that the mounting groove 18 can also be a recessed portion that is recessed from the inner wall of the sleeve 12 toward the outer wall 121 of the sleeve, without penetrating the side wall of the sleeve 12. During the assembly process, the sensing capacitor bar 15 can be attached to the cup body 11 first (at this time, the sensing capacitor bar 15 is held between the cup body 11 and the sleeve 12, the groove is stretched, and the space enclosed by the sleeve 12 becomes larger), and then the position of the sleeve 12 is adjusted so that the sensing capacitor bar 15 is stuck in the mounting groove 18 (at this time, the groove returns to its original state, and the gap between the cup body 11 and the sleeve 12 is smaller).

[0024] In practical applications, the water storage device may further include a housing (not shown) that is sleeved on the sleeve 12, with the capacitance detection chip 13 electrically connected to the housing. That is, the sensing capacitor strip 15 or the reference capacitor strip 16 serves as one electrode of the capacitor, while the other electrode of the capacitor is in the capacitor chip and grounded via the housing. In other words, one electrode of the capacitor is the sensing capacitor strip 15 or the reference capacitor strip 16, and the other electrode is the water in the cup body 11. The insulating medium of the capacitor is the side wall of the cup body 11. This arrangement can prevent the influence of external metal on the detection capacitance value and the reference capacitance value, thereby improving the accuracy of the detection.

[0025] Specifically, in the height direction of the cup body 11 , the reference capacitor bar 16 is located below the plurality of sensing capacitor bars 15 and is aligned with the plurality of sensing capacitor bars 15 .

[0026] Furthermore, the water storage device may also include a water outlet trough (not shown) for discharging water when pouring. The water outlet trough may be arranged on the cup body 11 and the outer shell. The cup body 11 may include: a first side close to the water outlet trough, and a second side arranged opposite to the first side in the radial direction. The sensing capacitor bar 15 and / or the reference capacitor bar 16 are located on the second side, that is, the water outlet trough is arranged away from the sensing capacitor bar 15 and the reference capacitor bar 16. Such an arrangement can avoid the problem of tea leaves adhering to the side wall where the sensing capacitor bar 15 and / or the reference capacitor bar 16 are located when pouring tea, thereby affecting the accuracy of detection.

[0027] In this embodiment, there are two sensing capacitor bars 15, one sensing capacitor bar 15 is located at half the height of the cup body 11, and the other sensing capacitor bar 15 is located at two-thirds the height of the cup body 11, so that it can accurately detect whether the water level reaches half and two-thirds of the height of the cup body 11, which can better adapt to the water demand when making tea.

[0028] In order to ensure that the sensing capacitor bar 15 and the reference capacitor bar 16 have sufficient capacitance judgment area, due to the influence of the height of the water storage equipment, the length of the capacitor bar (the sensing capacitor bar 15 and / or the reference capacitor bar 16) (the dimension in the circumferential direction of the cup body) can be set larger. However, if the length of the capacitor bar is too large, it may not be able to avoid the side of the water outlet, resulting in tea leaves adhering to one side of the capacitor bar. Therefore, in this embodiment, the length of the capacitor bar is set to 45mm (millimeter)-60mm, and the width of the capacitor bar (the dimension in the height direction of the cup body, that is, the dimension in the axial direction) is set to 1mm-10mm. Preferably, the length of the capacitor bar is 50mm to meet the above requirements.

[0029] In actual application, the sensing capacitor bar 15 is fixed to the outer wall of the cup body 11 via adhesive (not shown), and / or the reference capacitor bar 16 is fixed to the outer wall 121 of the sleeve 12 via adhesive. The thickness of the adhesive is 0.08 mm to 0.12 mm. Preferably, the thickness of the adhesive is 0.1 mm. This arrangement ensures the viscosity of the adhesive and avoids the problem of excessive thickness of the adhesive, which leads to excessive detection error of the sensing capacitor bar 15 or the reference capacitor bar 16. The adhesive can be heat-resistant adhesive, so as to avoid the viscosity of the adhesive decreasing due to high temperature and failing to meet the viscosity requirements. For example, GTM715B can hang a 500-gram weight at 70 degrees Celsius for greater than or equal to 5,000 minutes, and can hang a 1,000-gram weight at room temperature for greater than or equal to 10,000 minutes.

[0030] Among them, the water storage device can be a kettle, a teapot, a water cup, etc., the material of the cup body 11 can be non-metallic materials such as plastic, glass, ceramics, purple clay, etc., the material of the induction capacitor bar 15 and the reference capacitor bar 16 can be metal materials such as copper foil and aluminum foil, the material of the sleeve 12 can be non-metallic materials such as plastic, glass, ceramics, purple clay, etc., and the material of the outer shell can be metal materials such as copper, aluminum, iron, etc.

[0031] In practical applications, the above water storage equipment can use the reference capacitance method and calibration method to detect the water level, as follows:

[0032] For the reference capacitance method, the capacitance threshold can be set directly, and the threshold is usually between 0 and 1pF.

[0033] During use, the capacitance detection chip 13 is first used to obtain the reference capacitance value of the reference capacitance bar 16 and the actual capacitance value of each of the multiple sensing capacitance bars 15, and then the controller 14 is used to determine whether the difference between the actual capacitance value and the reference capacitance value of each sensing capacitance bar 15 reaches the corresponding capacitance threshold, wherein each sensing capacitance bar 15 corresponds to a capacitance threshold, and after determining that the difference between the maximum value of the actual capacitance values ​​of the multiple sensing capacitance bars 15 (assuming it is the actual capacitance value of the i-th sensing capacitance bar 15) and the reference capacitance value reaches the capacitance threshold (i-th capacitance threshold) corresponding to the sensing capacitance bar 15, a prompt message is output to indicate that the current water level has reached the sensing capacitance bar 15 (i-th sensing capacitance bar 15).

[0034] Optionally, after determining that the difference between the actual capacitance value of the i-th sensing capacitor bar 15 and the reference capacitance value reaches the i-th capacitance threshold, the controller 14 may further include: determining whether the difference between the actual capacitance value of the i-1-th sensing capacitor bar 15 and the reference capacitance value reaches the i-1-th capacitance threshold, and if so, outputting a prompt message indicating that the current water level has reached the i-th sensing capacitor bar 15. By comparing the maximum value among the actual capacitance values ​​(assuming it is the actual capacitance value of the i-th sensing capacitor bar 15) with the capacitance threshold (i-th capacitance threshold) corresponding to the sensing capacitor bar 15, and comparing the actual capacitance value of the i-1-th sensing capacitor bar 15 with the i-1-th capacitance threshold, the water level is determined to have reached the sensing capacitor bar 15 corresponding to the maximum value among the actual capacitance values ​​only when both conditions are met, thereby improving accuracy.

[0035] For example, there are two sensing capacitor bars 15, one sensing capacitor bar 15 is located at one-half of the height of the cup body 11, and the other sensing capacitor bar 15 is located at two-thirds of the height of the cup body 11. After it is determined that the actual capacitance value of the sensing capacitor bar 15 located at two-thirds of the height of the cup body 11 reaches the first capacitance threshold, it is also necessary to determine that the actual capacitance value of the sensing capacitor bar 15 located at one-half of the height of the cup body 11 reaches the second capacitance threshold before an output is output to indicate that the current water level has reached two-thirds of the height of the cup body 11.

[0036] For the calibration method, it is necessary to perform calibration before leaving the factory, specifically as follows: using the capacitance detection chip 13 to respectively obtain the first reference capacitance value of each of the multiple sensing capacitor bars 15 in the empty cup state, using the first reference capacitance value as the reference capacitance value, and setting the reference capacitance range according to the first reference capacitance value. For example, if the first reference capacitance value is 10C, the reference capacitance range can be set to 11C-12C; and using the capacitance detection chip 13 to respectively obtain the measured capacitance value of the sensing capacitor bar 15 that is consistent with the height of each sensing capacitor bar 15 when the water level in the water storage device is consistent with the height of each sensing capacitor bar 15 during the process of continuously pouring water into the water storage device, and the first reference capacitance value of the reference capacitor bar 16; according to the measured capacitance value, reference capacitance value and first reference capacitance value of each sensing capacitor bar 15, the capacitance threshold corresponding to each sensing capacitor bar 15 is determined.

[0037] During use, when the cup is empty, the capacitance detection chip 13 is used to re-acquire the second reference capacitance value of each of the multiple sensing capacitor bars 15 in the empty cup state. If the second reference capacitance value exceeds the reference capacitance range multiple times, the reference capacitance value is reset based on the second reference capacitance value. For example, if the reference capacitance range is 11C-12C and the second reference capacitance value reaches 13C five times, 13C is used as the new reference capacitance value. Based on the measured capacitance value of each sensing capacitor bar 15, the new reference capacitance value, and the first baseline capacitance value, the capacitance threshold corresponding to each sensing capacitor bar 15 is re-determined. By continuously updating the reference capacitance value during use to re-determine the capacitance threshold corresponding to each sensing capacitor bar 15, errors caused by factors such as aging can be eliminated.

[0038] The capacitance detection chip 13 obtains the actual capacitance values ​​of each of the multiple sensing capacitor bars 15 in use, as well as the second reference capacitance value of the reference capacitor bar 16. The controller 14 then determines when the difference between the actual capacitance value of the i-th sensing capacitor bar 15 and the second reference capacitance value reaches the i-th capacitance threshold, and then outputs a prompt indicating that the current water level has reached the i-th sensing capacitor bar 15. Because the capacitance threshold is set based on the first reference capacitance value, the second reference capacitance value is used in the determination process. This eliminates the influence of factors such as moisture adhering between the cup body 11 and the sleeve 12 during use, thereby improving accuracy.

[0039] Optionally, after the controller 14 determines that the difference between the actual capacitance value of the i-th sensing capacitor bar 15 and the second reference capacitance value, and the difference between the actual capacitance value and the second benchmark capacitance value, reaches the i-th capacitance threshold, the controller 14 may further include: calculating the rate of change of the actual capacitance value of the i-th sensing capacitor bar 15; and after determining that the rate of change of the actual capacitance value is greater than or equal to the capacitance change rate threshold, outputting a prompt message indicating that the current water level has reached the i-th sensing capacitor bar 15. By determining the relationship between the rate of change of the actual capacitance value and the capacitance change rate threshold, misjudgments caused by fluctuations in the detection value and misjudgments caused by shaking the water storage device can be eliminated. Using both the capacitance threshold and the capacitance change rate as the two factors for judgment improves accuracy.

[0040] The steps of the various methods above are divided only for the purpose of clear description. During implementation, they can be combined into one step or some steps can be split and decomposed into multiple steps. As long as they include the same logical relationship, they are all within the scope of protection of this patent. Adding insignificant modifications or introducing insignificant designs to the algorithm or process without changing the core design of the algorithm and process are all within the scope of protection of this patent.

[0041] Compared with the prior art, the embodiment of the present invention is characterized in that a plurality of sensing capacitor bars 15 are provided on the outer wall of the cup body 11, the sensing capacitor bars 15 extend along the circumference of the cup body 11, and the plurality of sensing capacitor bars 15 are arranged in sequence along the height direction of the cup body 11. The sleeve 12 sleeves the cup body 11 therein, and a reference capacitor bar 16 is provided on the outer wall 121 of the sleeve 12, and the reference capacitor bar 16 extends along the circumference of the sleeve 12. The capacitance detection chip 13 is used to detect the detection capacitance value of each of the plurality of sensing capacitor bars 15 and the reference capacitance of the reference capacitor bar 16. The controller 14 is used to output prompt information representing the current water level according to the detected capacitance value and the reference capacitance value, thereby realizing automatic detection of the water level in the water storage device and improving convenience; at the same time, since the change in the reference capacitance value reflects the change in the induced capacitance value caused by environmental factors (for example, factors such as water vapor attached between the cup body 11 and the sleeve 12), the reference capacitance value detected by the reference capacitance bar 16 is comprehensively considered in the process of water level acquisition, which can eliminate the error caused by the external environment and ensure the accuracy of water level detection.

[0042] A second embodiment of the present invention relates to a water storage device, such as Figure 2The second embodiment is substantially the same as the first embodiment, with the main difference being that, in the second embodiment, multiple auxiliary capacitor bars 19 are further provided on the outer wall of the cup body 11, and the multiple auxiliary capacitor bars 19 are electrically connected to the capacitance detection chip 13. The auxiliary capacitor bars 19 are arranged in pairs with the inductive capacitor bars 15, and the auxiliary capacitor bars 19 and inductive capacitor bars 15 in each pair are of equal height. The water level is determined to have reached that height only when a pair of capacitor bars of equal height simultaneously meet the condition. This avoids misjudgment caused by tilting the water storage device and further improves the accuracy of water level detection.

[0043] It is understandable that an auxiliary capacitor bar 19 is also provided on the outer wall of the cup body 11, and the auxiliary capacitor bar 19 is electrically connected to the capacitance detection chip 13; the auxiliary capacitor bar 19 is equal in height to the highest sensing capacitor bar 15, that is, no auxiliary capacitor bar 19 of equal height is provided for the sensing capacitor bars 15 other than the highest sensing capacitor bar 15. By providing only the highest sensing capacitor bar 15 with a matching (i.e., equal in height) auxiliary capacitor bar 19, the highest sensing capacitor bar 15 and the auxiliary capacitor bar 19 are used to simultaneously determine whether the water storage device is full of water. This can not only accurately determine whether the water is full, so that tea can be brewed when the water is full, but also avoid the problem of excessive cost caused by too many auxiliary capacitor bars 19.

[0044] It is not difficult to find that this embodiment corresponds to the first embodiment, and this embodiment can be implemented in conjunction with the first embodiment. The relevant technical details mentioned in the first embodiment are still valid in this embodiment, and in order to reduce repetition, they are not repeated here. Accordingly, the relevant technical details mentioned in this embodiment can also be applied to the first embodiment. In addition, the judgment conditions of the capacitance value of the auxiliary capacitor bar 19 and the capacitance value of the inductive capacitor bar 15 are basically the same, and are not repeated here.

[0045] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present invention, and that in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A water storage device, characterized in that: include: A cup body, a sleeve, a capacitance detection chip, and a controller connected to the capacitance detection chip; A plurality of inductive capacitor bars are provided on the outer wall of the cup body, the inductive capacitor bars extend along the circumference of the cup body, and the plurality of inductive capacitor bars are sequentially arranged along the height direction of the cup body; The cup body is sheathed in the sleeve, a reference capacitor strip is provided on the outer wall of the sleeve, and the reference capacitor strip extends along the circumference of the sleeve; The sensing capacitor strips and the reference capacitor strips are both electrically connected to the capacitance detection chip, and the capacitance detection chip is used to detect the detection capacitance value of each of the plurality of sensing capacitor strips and the reference capacitance value of the reference capacitor strip, and send the detection capacitance value and the reference capacitance value to the controller; The controller is used to output prompt information representing the current water level according to the detected capacitance value and the reference capacitance value; The capacitance detection chip is located between the cup body and the sleeve, and the water storage device further includes: a groove penetrating the wall of the sleeve, and a conductive portion connecting the reference capacitance bar and the capacitance detection chip; The groove includes a first side wall for attaching the conductive part, the sleeve includes an outer wall and an inner wall arranged opposite to each other, the first side wall connects the outer wall and the inner wall, and the angle between the first side wall and the outer wall is an obtuse angle; The sleeve is provided with at least one mounting groove, and the inductive capacitor strip is accommodated in the mounting groove; It also includes a shell sleeved on the sleeve, and the capacitance detection chip is electrically connected to the shell.

2. The water storage device according to claim 1, characterized in that A plurality of auxiliary capacitor bars are further provided on the outer wall of the cup body, and the plurality of auxiliary capacitor bars are electrically connected to the capacitance detection chip; The auxiliary capacitor bars and the sensing capacitor bars are arranged in pairs, and the auxiliary capacitor bars and the sensing capacitor bars in each pair have the same height.

3. The water storage device according to claim 1, characterized in that An auxiliary capacitor bar is also provided on the outer wall of the cup body, and the auxiliary capacitor bar is electrically connected to the capacitance detection chip; The auxiliary capacitor bar has the same height as the inductive capacitor bar with the largest height.

4. The water storage device according to claim 1, characterized in that The cup body further comprises a water outlet groove, and the cup body comprises a first side close to the water outlet groove and a second side arranged opposite to the first side in a radial direction, and the sensing capacitor bar and / or the reference capacitor bar are located on the second side.

5. The water storage device according to claim 1, characterized in that: In the height direction of the cup body, the reference capacitor bar is located below the plurality of sensing capacitor bars and is aligned with the plurality of sensing capacitor bars.

6. The water storage device according to claim 1, characterized in that There are two inductive capacitor bars, one of which is located at half the height of the cup body, and the other of which is located at two-thirds the height of the cup body.

7. The water storage device according to claim 1, characterized in that The sensing capacitor strip is fixed to the outer wall of the cup body via adhesive, and / or the reference capacitor strip is fixed to the outer wall of the sleeve via adhesive, and the thickness of the adhesive is 0.08 mm to 0.12 mm.

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