Liquid level detection device and water tank

Abstract

The utility model relates to a liquid level detection device and a water tank, the liquid level detection device comprises a base body, a conductive metal piece and an electrode contact pin, a displacement space is arranged in the base body, and a through hole communicating with the displacement space is formed in the side wall of the base body in a penetrating mode; the conductive metal piece is arranged in the displacement space and reciprocates in the displacement space along with the lifting of the liquid level of the water tank; the electrode contact pin is arranged on the base body, the end, extending out of the base body, of the electrode contact pin is used for being connected with an external wire, the other end of the electrode contact pin extends into the displacement space and is arranged opposite to the conductive metal piece, and when a conduction signal generated after the electrode contact pin makes contact with the conductive metal piece is received, it is determined that the liquid level in the water tank reaches the preset water level. According to the liquid level detection device, through cooperation of the conductive metal piece and the electrode contact pin, the accuracy and reliability of a detection result can be improved.

Description

Liquid level detection device and water tank Technical Field

[0001] This application relates to the field of liquid level detection technology, and in particular to liquid level detection devices and water tanks. Background Technology

[0002] As the water purifier industry matures, people are paying close attention not only to the temperature of the purified water but also to the water flow rate at different temperature settings. Therefore, products that detect water levels are needed to address the issue of water tank level detection.

[0003] In related technologies, liquid level detection devices used in water purifiers include electrode probes and detection circuits. The electrode probes consist of two metal electrodes installed at different heights in the water tank of the water purifier. The detection circuit determines the liquid level by detecting changes in conductivity between the two electrodes. When the liquid level rises and both electrodes simultaneously come into contact with the liquid, the conductivity between the electrodes changes, and the detection circuit outputs a corresponding signal based on this change. However, this type of liquid level detection device, which uses conductivity as its principle, relies on the conductivity of the liquid. The conductivity varies significantly depending on the water quality, and the presence of air bubbles or impurities in the liquid can easily affect the conductivity detection results, leading to low accuracy and reliability of the liquid level detection. Summary of the Invention

[0004] Therefore, it is necessary to provide a liquid level detection device and a water tank to address the problem of low accuracy and reliability of liquid level detection results in related technologies.

[0005] In a first aspect, this application provides a liquid level detection device, comprising:

[0006] The matrix has a displacement space within it, and a through hole communicating with the displacement space is provided through the side wall of the matrix.

[0007] The conductive metal component is installed in the displacement space and moves back and forth in the displacement space as the liquid level in the water tank rises and falls.

[0008] An electrode contact pin is mounted on the substrate. One end of the electrode contact pin extends out of the substrate and is connected to an external wire. The other end of the electrode contact pin extends into the displacement space and is positioned opposite to the conductive metal part. When a conduction signal is received after the electrode contact pin and the conductive metal part come into contact, it is determined that the liquid level in the water tank has reached the preset water level.

[0009] In one embodiment, the conductive metal component includes:

[0010] The float is movable within the displacement space;

[0011] A conductive metal sheet is connected to a float, and the float is positioned on the side close to the electrode contact pin.

[0012] In one embodiment, the conductive metal component is a hollow conductive metal component, which is movably disposed within the displacement space.

[0013] In one embodiment, the substrate includes:

[0014] The guide rail body has one end of the displacement space penetrating through the bottom wall of the guide rail body, and the electrode contact pin is set on the guide rail body;

[0015] The base is located at the end of the guide rail body away from the electrode contact pin, and the base is detachably connected to the guide rail body.

[0016] In one embodiment, the base is provided with a groove opposite to the displacement space, and the groove wall is provided with a buckle that engages with the through hole.

[0017] In one embodiment, a drainage hole is provided through the bottom wall of the base, and the drainage hole communicates with the groove; or, the peripheral side wall and the bottom wall of the base are provided with interconnected drainage holes, and the groove and the through hole are both connected to the drainage hole.

[0018] In one embodiment, raised ribs are provided on the bottom wall of the groove.

[0019] Secondly, this application provides a water tank, including any of the liquid level detection devices provided in the first aspect, which are welded to the base or installed on the water tank via connecting components.

[0020] In one embodiment, the water tank has a mounting hole, the electrode probe extends out of the mounting hole, and the connecting assembly includes:

[0021] A fixing nut is threaded to the outer peripheral wall of the end of the base that extends out of the mounting hole;

[0022] The sealing element is fitted onto the outer peripheral wall of the substrate and is used to seal the mounting hole.

[0023] In one embodiment, a raised ridge extends around the outer peripheral wall of the substrate, the cross-sectional diameter of the raised ridge being larger than the diameter of the mounting hole, and the seal is pressed between the water tank and the raised ridge.

[0024] The aforementioned liquid level detection device is suitable for water tanks. The device includes a base, a conductive metal component, and an electrode probe. The base has a displacement space, and a through hole communicating with the displacement space is provided on the side wall of the base. The conductive metal component is disposed in the displacement space and reciprocates within the displacement space as the liquid level in the water tank rises and falls. The electrode probe is disposed on the base, with one end extending out of the base for connection to an external wire, and the other end extending into the displacement space and positioned opposite the conductive metal component. When a conduction signal is received after the electrode probe and the conductive metal component come into contact, it is determined that the liquid level in the water tank has reached the preset level. When the liquid level has not reached the preset level, there is a certain distance between the conductive metal part and the electrode contact. During the liquid level rise and fall, the conductive metal part will rise and fall synchronously with the liquid level within the displacement space. When the conductive metal part contacts the electrode contact and generates a conduction signal, it indicates that the liquid level has reached the preset level. Therefore, compared with the traditional method of detecting whether the liquid level has reached the preset level by conductivity, the detection result of the liquid level detection device of this application is more accurate and reliable. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 is a schematic diagram of the structure of a liquid level detection device in some embodiments of this application;

[0027] Figure 2 is an exploded structural diagram of some embodiments of this application, illustrating the connection relationship between the electrode stylus, the guide rail body, the conductive metal part and the base.

[0028] Figure 3 is a structural schematic diagram in some embodiments of this application, which illustrates the positional relationship between the through hole on the guide rail body and the drain hole on the base.

[0029] Figure 4 is a schematic diagram of the structure of the base according to some embodiments of this application.

[0030] Explanation of icon numbers:

[0031] 100. Base; 102. Displacement space; 104. Through hole; 106. Raised ridge; 110. Guide rail body; 120. Base; 122. Drain hole; 124. Groove; 125. Buckle; 126. Raised rib; 200. Conductive metal part; 210. Float ball; 220. Conductive metal sheet; 300. Electrode contact pin; 400. Connecting assembly; 410. Fixing nut; 420. Seal. Detailed Implementation

[0032] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0033] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," "vertical," and "horizontal," 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.

[0034] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two elements or the interaction between two elements, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. It should be noted that when an element is referred to as "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intervening element present.

[0036] As the water purifier industry matures, people are paying close attention not only to the temperature of the purified water but also to the water flow rate at different temperature settings. Therefore, products that detect water levels are needed to address the issue of water tank level detection.

[0037] In related technologies, liquid level detection devices used in water purifiers include electrode probes and detection circuits. The electrode probes consist of two metal electrodes installed at different heights in the water tank of the water purifier. The detection circuit determines the liquid level by detecting changes in conductivity between the two electrodes. When the liquid level rises and both electrodes simultaneously come into contact with the liquid, the conductivity between the electrodes changes, and the detection circuit outputs a corresponding signal based on this change. However, this type of liquid level detection device, which uses conductivity as its principle, relies on the conductivity of the liquid. The conductivity varies significantly depending on the water quality, and the presence of air bubbles or impurities in the liquid can easily affect the conductivity detection results, leading to low accuracy and reliability of the liquid level detection.

[0038] To address the problem of low accuracy and reliability of liquid level detection results in related technologies, in a first aspect, referring to Figures 1 and 2, an embodiment of this application provides a liquid level detection device suitable for water tanks. The liquid level detection device includes a base 100, a conductive metal component 200, and an electrode probe 300. The base 100 has a displacement space 102, and a through hole 104 communicating with the displacement space 102 is provided through the side wall of the base 100. The conductive metal component 200 is disposed within the displacement space 102 and reciprocates within the displacement space 102 as the liquid level in the water tank rises and falls. The electrode probe 300 is disposed on the base 100, with one end extending out of the base 100 for connection to an external wire, and the other end extending into the displacement space 102 and positioned opposite to the conductive metal component 200. When a conduction signal is received after the electrode probe 300 and the conductive metal component 200 come into contact, it is determined that the liquid level in the water tank has reached a preset level.

[0039] The electrode contact 300 is located at one end of the base 100, the displacement space 102 is located at the other end of the base 100, and the through hole 104 is elongated, with the stretching direction of the through hole 104 consistent with the extension direction of the displacement space 102. One end of the external wire is connected to the electrode contact 300, and the other end of the external wire is connected to the main control unit of the water tank to smoothly transmit the conductive signal to the main control unit of the water tank.

[0040] Specifically, the liquid level detection device can be installed in the water tank via the base 100. The device can be installed at any position in the water tank, such as the top, middle, or bottom, according to actual liquid level detection needs. It can also be installed at different heights within the same water tank to detect different water levels. For example, when the device is installed at the top of the water tank, it detects whether the water level has reached a preset maximum level. When the preset maximum level is reached, the electrode probe 300 and the conductive metal part 200 contact and generate a conduction signal. This conduction signal can be transmitted to the control element inside the water tank via an external wire, thereby stopping the addition of water to the tank. Similarly, when the liquid level detection device is installed at the bottom of the water tank, it is used to detect whether the liquid level in the water tank has dropped to the preset minimum water level. When the liquid level drops to the preset minimum water level, the electrode contact pin 300 and the conductive metal part 200 contact and generate a conduction signal. This conduction signal can be transmitted to the control element in the water tank through an external wire, so that the control element can control the water tank to issue an alarm to remind you to add water.

[0041] In this embodiment, when the liquid level has not reached the preset water level, there is a certain distance between the conductive metal part 200 and the electrode contact needle 300. During the liquid level rise and fall process, the conductive metal part 200 will rise and fall synchronously with the liquid level within the displacement space 102. When the conductive metal part 200 contacts the electrode contact needle 300 and generates a conduction signal, it indicates that the liquid level has reached the preset water level. Thus, accurate liquid level detection results can be obtained, making the liquid level detection device of this application more accurate and reliable than the traditional liquid level detection results detected by conductivity.

[0042] Referring to FIG2, in some embodiments, the conductive metal component 200 includes a float 210 and a conductive metal sheet 220. The float 210 is movably disposed within the displacement space 102; the conductive metal sheet 220 is connected to the float 210 and is disposed on the side of the float 210 close to the electrode contact pin 300.

[0043] The conductive metal sheet 220 is fixed to the float 210 by heat fusion, and the conductive metal sheet 220 is located between the float 210 and the electrode contact pin 300. The float 210 is confined within the displacement space 102, and when liquid enters the displacement space 102 through the through hole 104, it can rise and fall synchronously with the liquid surface, that is, it can float up and down within the displacement space 102.

[0044] Specifically, when water is poured into the water tank, as the liquid level gradually rises, the liquid level detection devices installed at different heights on the water tank will be continuously triggered. That is, the float ball 210 will drive the conductive metal plate 220 to rise to the point where the conductive metal plate 220 connects with the electrode contact pin 300, and generate a conduction signal. Based on the conduction signal, the current liquid level height can be determined.

[0045] For example, when the liquid level detection device is installed on the top of the water tank to detect whether the liquid level in the tank has reached the preset maximum water level, as the liquid level gradually rises until the liquid enters the displacement space 102 through the through hole 104, the float 210 will drive the conductive metal sheet 220 to continue to rise. When the conductive metal sheet 220 contacts the electrode contact pin 300, a conduction signal is generated. Based on this conduction signal, it can be determined that the liquid level in the water tank has reached the preset maximum water level.

[0046] Similarly, when the liquid level detection device is installed at the bottom of the water tank to detect whether the liquid level in the tank has dropped to the preset minimum water level, as the liquid level gradually drops until the through hole 104 is exposed, the float ball 210 will drive the conductive metal plate 220 to gradually descend. When the conductive metal plate 220 is in contact with the electrode contact pin 300, a conduction signal is generated. Based on this conduction signal, it can be determined that the liquid level in the water tank has reached the preset minimum water level.

[0047] In this embodiment, the buoyancy of the float 210 drives the conductive metal sheet 220 to rise and fall with the liquid level, thereby improving the accuracy and reliability of the liquid level detection results.

[0048] In other embodiments, the conductive metal part 200 is a hollow conductive metal part, which is movably disposed within the displacement space 102.

[0049] Unlike the combination of float 210 and conductive metal sheet 220, the hollow conductive metal part in this embodiment can both float with the liquid surface and has good conductivity.

[0050] Specifically, the hollow conductive metal component in this embodiment can be a hollow conductive metal sphere or a hollow conductive metal block. Its shape is not specifically limited, as long as it can float with the liquid surface and conduct electricity.

[0051] Referring to Figures 1 and 2, in some embodiments, the base 100 includes a guide rail body 110 and a base 120. One end of the displacement space 102 penetrates the bottom wall of the guide rail body 110, and the electrode stylus 300 is disposed on the guide rail body 110. The base 120 is disposed at the end of the guide rail body 110 away from the electrode stylus 300, and the base 120 is detachably connected to the guide rail body 110.

[0052] Specifically, the base 120 is coaxially arranged with the guide rail body 110, and the guide rail body 110 and the base 120 are detachably connected so that the conductive metal part 200 can be placed in the displacement space 102. The electrode needle 300 penetrates vertically through the guide rail body 110 and is embedded in the guide rail body 110. One end of the electrode needle 300 extends out of the guide rail body 110 and is connected to an external wire, while the other end of the electrode needle 300 extends into the displacement space 102 and is opposite to the conductive metal part 200.

[0053] Referring to Figures 3 and 4, in some embodiments, the base 120 is provided with a groove 124 opposite to the displacement space 102, and a buckle 125 is provided on the groove wall of the groove 124, which engages with the through hole 104.

[0054] The buckle 125 is strip-shaped and is fixedly connected to the groove wall of the groove 124. The buckle 125 is inclined downward toward the center of the groove 124.

[0055] Specifically, after the conductive metal part 200 is placed into the displacement space 102 from the opening end of the displacement space 102, the base 120 is detachably connected to the guide rail body 110 by the snap-fit ​​between the buckle 125 and the through hole 104.

[0056] In this embodiment, the snap-fit ​​between the buckle 125 and the through hole 104 facilitates the quick assembly and disassembly of the guide rail body 110 and the base 120.

[0057] Referring to Figures 3 and 4, in some embodiments, a drainage hole 122 is provided through the bottom wall of the base 120, and the drainage hole 122 communicates with the groove 124; or, the peripheral side wall and the bottom wall of the base 120 are provided with interconnected drainage holes 122, and the groove 124 and the through hole 104 are both connected to the drainage hole 122.

[0058] Specifically, the number of drainage holes 122 can be one or more. The drainage holes 122 are provided on the bottom wall of the base 120 to prevent residual liquid from remaining inside the base 120 when the liquid level decreases. In other embodiments, to improve the drainage efficiency of residual liquid inside the base 120, the drainage holes 122 are extended onto the peripheral sidewall of the base 120, and both the groove 124 and the through hole 104 communicate with the drainage holes 122.

[0059] In this embodiment, the drainage hole 122 ensures that residual liquid in the base 120 is completely drained, thereby ensuring the cleanliness of the drinking water in the water tank.

[0060] Referring to Figure 4, in some embodiments, raised ribs 126 are provided on the bottom wall of the groove 124.

[0061] The raised ribs 126 are arranged in the shape of raised ridges 106 on the bottom wall of the groove 124, that is, the raised ribs 126 are arranged opposite to the conductive metal parts 200.

[0062] Specifically, in this embodiment, two raised ribs 126 are used as an example. The two raised ribs 126 are intersectingly arranged on the bottom wall of the groove 124, and the ends of the raised ribs 126 do not contact the side wall of the groove 124. When the conductive metal part 200 is about to separate from the bottom of the groove 124, in order to avoid the conductive metal part 200 from sticking to the bottom of the groove 124 due to its large surface area caused by the surface tension of water, the raised ribs 126 are provided to reduce the contact area between the conductive metal part 200 and the bottom of the groove 124.

[0063] In this embodiment, the protruding ribs 126 help to reduce the contact area between the conductive metal part 200 and the bottom of the groove 124, thereby reducing the possibility that the conductive metal part 200 will stick to the bottom of the groove 124 when it is separated from the bottom of the groove 124, which in turn helps to further improve the accuracy and reliability of the detection results of the liquid level detection device.

[0064] The liquid level detection device in this application improves the accuracy and reliability of liquid level detection results through the cooperation of the conductive metal part 200 and the electrode contact needle 300. Specifically, when the liquid level has not reached the preset water level, there is a certain distance between the conductive metal part 200 and the electrode contact needle 300. During the liquid level rise and fall process, the conductive metal part 200 will rise and fall synchronously with the liquid level within the displacement space 102. When the conductive metal part 200 contacts the electrode contact needle 300 and generates a conduction signal, it indicates that the liquid level has reached the preset water level. Therefore, compared with the traditional method of detecting whether the liquid level has reached the preset water level by conductivity, the detection results of the liquid level detection device in this application are more accurate and reliable.

[0065] Secondly, one embodiment of this application provides a water tank including any of the liquid level detection devices provided in the first aspect above, with the base 100 welded or installed on the water tank via a connecting assembly 400.

[0066] As can be seen from the above, the liquid level detection device can be installed at any position in the water tank according to the liquid level detection requirements, or it can be installed at multiple liquid levels at different heights in the water tank to detect different liquid levels.

[0067] Specifically, when installing the liquid level detection device in a water tank, the base 100 can be directly fixed to the water tank by welding, or the base 100 can be detachably connected to the water tank by the connecting component 400, thereby achieving a detachable connection between the liquid level detection device and the water tank.

[0068] Referring to Figures 1 to 3, in some embodiments, the water tank is provided with a mounting hole, the electrode contact 300 extends out of the mounting hole, and the connecting assembly 400 includes a fixing nut 410 and a sealing member 420. The fixing nut 410 is threadedly connected to the outer peripheral wall of the end of the base 100 that extends out of the mounting hole; the sealing member 420 is sleeved on the outer peripheral wall of the base 100 and is used to seal the mounting hole.

[0069] The base 100 is cylindrical in shape, and its outer peripheral wall is threaded. The fixing nut 410 is threadedly connected to the outer peripheral wall of the base 100. The sealing element 420 includes a silicone sealing ring.

[0070] Specifically, during installation, the end of the base 100 with the electrode contact 300 can be extended out of the water tank through the mounting hole. At this time, the end of the base 100 with the conductive metal part 200 is located inside the water tank. Then, tighten the fixing nut 410 so that the fixing nut 410 is pressed against the outer wall of the water tank. At this time, the sealing part 420 is also pressed against the water tank to seal the mounting hole and prevent the liquid in the water tank from leaking from the mounting hole.

[0071] Referring to Figures 2 and 3, in some embodiments, a protruding ridge 106 extends around the outer peripheral wall of the base 100. The cross-sectional diameter of the protruding ridge 106 is larger than the diameter of the mounting hole, and the sealing member 420 abuts against the water tank and the protruding ridge 106.

[0072] The protruding rib 106 is integrally formed with the base 100. The cross-sectional diameter of the protruding rib 106 is set to be larger than the diameter of the mounting hole, so that when the end of the base 100 with the electrode contact pin 300 extends out of the mounting hole from the water tank, the protruding rib 106 abuts against the inner wall of the water tank, so as to prevent the length of the base 100 extending out of the mounting hole from being too long. At this time, the sealing element 420 is located between the inner wall of the water tank and the protruding rib 106.

[0073] Specifically, taking the liquid level detection device installed on the top of the water tank as an example, the top cover of the water tank has an installation hole. The top cover of the water tank is movably connected to the water tank body. During installation, one end of the base 100 with the electrode contact pin 300 can be extended out of the top cover of the water tank through the installation hole. At this time, the protruding rib 106 presses the sealing element 420 against the inner wall of the top cover of the water tank. Then, the fixing nut 410 is screwed on from the other side of the installation hole until the fixing nut 410 is pressed against the outer wall of the top cover of the water tank, thereby realizing the installation of the base 100 and the top cover of the water tank.

[0074] In this embodiment, the length of the base 100 extending out of the mounting hole can be quickly determined by the protruding ridge 106, which also makes it easier for workers to quickly install the liquid level detection device with the water tank.

[0075] The water tank in this application, after being equipped with any of the liquid level detection devices provided in the first aspect, also has the corresponding technical effect of improving the accuracy and reliability of the liquid level detection results.

[0076] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.

[0077] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0078] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A liquid level detection device, suitable for water tanks, characterized in that, The liquid level detection device includes: a base (100) with a displacement space (102) inside the base (100) and a through hole (104) communicating with the displacement space (102) through the side wall of the base (100); a conductive metal component (200) disposed in the displacement space (102) and reciprocating within the displacement space (102) as the liquid level in the water tank rises and falls; and an electrode probe (300) disposed on the base (100), one end of which extends out of the base (100) for connection with an external wire, and the other end of which extends into the displacement space (102) and is positioned opposite to the conductive metal component (200). When a conduction signal is received after the electrode probe (300) and the conductive metal component (200) come into contact, it is determined that the liquid level in the water tank has reached a preset level.

2. The liquid level detection device according to claim 1, characterized in that, The conductive metal component (200) includes: a float (210) movably disposed within the displacement space (102); and a conductive metal sheet (220) connected to the float (210) and disposed on the side of the float (210) close to the electrode contact pin (300).

3. The liquid level detection device according to claim 1, characterized in that, The conductive metal part (200) is a hollow conductive metal part, and the hollow conductive metal part is movably disposed within the displacement space (102).

4. The liquid level detection device according to claim 1, characterized in that, The base (100) includes: a guide rail body (110), one end of the displacement space (102) penetrating the bottom wall of the guide rail body (110), and the electrode stylus (300) disposed on the guide rail body (110); and a base (120) disposed at one end of the guide rail body (110) away from the electrode stylus (300), and the base (120) being detachably connected to the guide rail body (110).

5. The liquid level detection device according to claim 4, characterized in that, The base (120) is provided with a groove (124) opposite to the displacement space (102), and a buckle (125) is provided on the groove wall of the groove (124), which engages with the through hole (104).

6. The liquid level detection device according to claim 5, characterized in that, A water leakage hole (122) is provided through the bottom wall of the base (120), and the water leakage hole (122) is connected to the groove (124); or, the peripheral side wall and the bottom wall of the base (120) are provided with interconnected water leakage holes (122), and the groove (124) and the through hole (104) are both connected to the water leakage hole (122).

7. The liquid level detection device according to claim 5, characterized in that, The groove (124) has raised ribs (126) on the bottom wall.

8. A water tank, characterized in that, The liquid level detection device includes any one of claims 1-7, wherein the substrate (100) is welded or mounted on the water tank via a connecting assembly (400).

9. The water tank according to claim 8, characterized in that, The water tank is provided with an installation hole, and the electrode contact pin (300) extends out of the installation hole. The connecting assembly (400) includes: a fixing nut (410) which is threaded to the outer peripheral wall of one end of the base (100) that extends out of the installation hole; and a sealing member (420) which is sleeved on the outer peripheral wall of the base (100) and is used to seal the installation hole.

10. The water tank according to claim 9, characterized in that, The outer peripheral wall of the substrate (100) is provided with a protruding ridge (106) extending around the substrate (100). The cross-sectional diameter of the protruding ridge (106) is larger than the diameter of the mounting hole. The sealing element (420) abuts against the water tank and the protruding ridge (106).

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