Water level sensor and water boiling device formed by same

Abstract

The utility model discloses a water level sensor and a water boiling device formed by the same. The water level sensor comprises a first sensing piece, the first sensing piece is provided with a sensing end and a connecting end which are connected into a whole, a first liquid sealing insulating layer is arranged on the outer wall of the connecting end of the first sensing piece, and the connecting end of the first sensing piece is used for penetrating out of a measured water container to be connected with a corresponding water level sensing signal line. A first through hole penetrating through the sensing end and the connecting end is formed in the first sensing piece, and a rod piece is arranged in the first through hole in a sealed and penetrating mode. The rod piece is a second induction piece or a water inlet pipe. And the sensing end is used for detecting the water level at a certain height in the detected water container. When the water level sensor is installed on a detected water container with similar purposes such as an electric kettle and the like, only one installation hole is needed, high and low water levels can be reliably detected in a narrow working space, under-pressure, closed, high-temperature and high-humidity environment, even temperature measurement and high-position water inflow can be achieved at the same time, installation is easy, cost is low, and the faults of dry burning and water overflowing of a water boiling device can be effectively prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, in particular to a water level sensor and a water boiling device composed of the sensor. Background Art

[0002] The water boiling device mentioned in this patent application refers specifically to an electric kettle and its components such as a tea art stove, a tea bar machine, an electric water boiler, a water dispenser, a juicer, etc., which need to accurately measure and control the water level or water capacity in a high temperature, humid, and closed small space, and includes a water container that must measure the water level and a corresponding water level sensor. These water boiling devices and water level sensors are electrical appliances that we often come into contact with in our daily lives, especially for people who love to drink tea, and their water containers are electric kettles for boiling water. The water containers mentioned here are made of stainless steel, glass, and ceramics, and some water containers exist in the form of kettles and electric heating tubes, and some exist in the form of water tanks and water storage tanks.

[0003] In the existing water container to be tested, if it is necessary to monitor the water level in the water container to prevent dry boiling due to lack of water, prevent overflow, and intelligently add water in a quantitative manner, it is necessary to add a water level sensor or even a temperature sensor that can measure the water level in the water container to be tested.

[0004] However, currently common water level sensors are divided into low water level sensors and high water level sensors, which can be used in combination or separately. One of the physical components is the induction probe, which is usually made of stainless steel rods. The low water level sensor is used to detect that the water level of the water container being tested is too low, in order to prevent dry boiling or to achieve automatic water addition; the high water level sensor is used to detect that the water level of the water container being tested is too high, in order to prevent overflow when adding water under any circumstances, especially when the water is boiling. If the current water container being tested needs to be equipped with a water level sensor for high and low water level measurement and control, two mounting holes must be opened on the bottom and / or side wall of the water container being tested to install the low water level sensor and the high water level sensor respectively. Since the working space of the water container to be tested for electric kettles and other similar purposes is small, pressurized, closed, and high temperature and humidity (especially the environment where boiling water vapor fills the water container to be tested and scale is serious), this increases the difficulty in the manufacturing process and measurement and control of the water container to be tested. In particular, after the existing water level sensor has been used for a period of time, because it is in the water container to be tested and is a bare steel rod, scale is easily formed on the surface, thereby reducing the sensing sensitivity and losing the function of sensing the water level, causing the control of the water container to be tested to fail or even electrical short circuit, endangering the life and safety of people and the water boiling device. Utility Model Content

[0005] The task of the utility model is to provide a water level sensor suitable for a water boiling device for electric kettles and similar purposes, which can reliably detect high and / or low water levels and even measure temperature at the same time in a narrow, pressurized, closed, high-temperature and high-humidity working space and a water boiling device composed of the water level sensor.

[0006] The primary task of the utility model is to provide a water level sensor which is compact, small, easy to install, low in cost and reliable.

[0007] The second task of the utility model is to provide a three-in-one composite water level and temperature sensor which is compact, small, easy to install, low in cost and can accurately measure temperature within the extremely small spatial structure of the above-mentioned water level sensor.

[0008] The third task of the utility model is to provide a water level sensor capable of adding water at a high position of a wall or a handle.

[0009] The fourth task of the utility model is to provide a water boiling device based on the water level sensor.

[0010] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0011] A water level sensor, characterized in that it includes a first sensing member, the first sensing member has a sensing end and a connecting end which are connected to each other as a whole, a first liquid-tight insulating layer is provided on the outer wall of the connecting end of the first sensing member, the connecting end of the first sensing member is used to pass through the water container to be measured and connect with the corresponding water level sensing signal line, a first through hole is provided on the first sensing member to pass through the sensing end and the connecting end, a rod is provided in the first through hole in a liquid-tight and mutually insulated manner; the sensing end of the first sensing member is used to detect a water level at a height in the water container to be measured.

[0012] The rod member is a second sensing member, which also has a sensing end and a connecting end connected to each other as a whole. A second liquid-tight insulating layer is provided on the connecting end of the second sensing member for liquid-tightness and electrical insulation with the first sensing member. The connecting end of the second sensing member extends from the sensing end of the first sensing member through the first through hole to the bottom of the first sensing member and is used to be connected to the corresponding water level sensing signal line. The sensing end of the first sensing member and the sensing end of the second sensing member are respectively used to detect water levels at two relative heights in the measured water container.

[0013] Preferably, the first sensing element is vertically fixed on the bottom of the water container to be measured when in use, the sensing end of the first sensing element is used to measure and control the low water level in the water container to be measured, and the sensing end of the second sensing element is located above the sensing end of the first sensing element, and is used to measure and control the high water level in the water container to be measured.

[0014] Preferably, the connecting end of the first sensing element is connected to the side wall of the water container to be measured, the sensing end of the first sensing element is used to measure and control the low water level or high water level in the water container to be measured, and the sensing end of the second sensing element is electrically connected upward or downward to a second extended sensing end, which is used to measure and control the high water level or low water level in the water container to be measured.

[0015] Preferably, the connecting end of the first sensing element is connected to the side wall of the water container to be measured, and the sensing end of the first sensing element is electrically connected upward or downward to a first extended sensing end for measuring and controlling the high water level or the low water level in the water container to be measured, and the sensing end of the second sensing element is opposite to the first extended sensing end, and is used to measure and control the low water level or the high water level in the water container to be measured.

[0016] Preferably, the first induction member is a hollow metal pipe, and the second induction member is a solid or hollow metal pipe.

[0017] Preferably, the first sensing member is a hollow rivet-shaped member, and the second sensing member is a solid or hollow cylindrical metal member.

[0018] Preferably, the sensing end of the first sensing element and the sensing end of the second sensing element are metals of any one material including stainless steel, silver, and titanium; the sensing end of the first sensing element and the sensing end of the second sensing element are metals of any one material including stainless steel, silver, and titanium; the sensing end of the second sensing element and its body are two bodies, the sensing end is a columnar nut or a screw with a sealed top, the corresponding connecting end of its body is a screw or a nut, the body is stationary, and the sensing end is telescopic and adjustable, forming a water level depth measurement and control regulator.

[0019] Preferably, the first liquid-tight insulating layer and the second liquid-tight insulating layer are made of food-grade silicone, Teflon, PP tube or coating layer.

[0020] Preferably, a fastening thread, an insulating sealing gasket and a nut are provided at the connection end of the first sensing element, and a water level signal line lead-out terminal is provided between the insulating sealing gasket and the nut.

[0021] Preferably, a fastening thread, an insulating sealing gasket and a nut are provided on the connecting end of the second sensing element, and a water level signal line lead-out terminal is provided between the insulating sealing gasket and the nut.

[0022] Preferably, a fastening thread, an insulating sealing gasket and a nut are provided on the connecting end of the second sensing element, and a water level signal line lead-out terminal is provided between the insulating sealing gasket and the nut.

[0023] As another implementation mode, as an expansion of the new use of the first basic technical solution, the rod is a water inlet pipe.

[0024] The water inlet pipe is a plastic pipe.

[0025] As another implementation:

[0026] A water level sensor, the water level sensor includes a first sensing element, the first sensing element has a sensing end and a connecting end which are connected to each other as a whole, the connecting end of the first sensing element is used to pass through the water container to be measured and connect with its corresponding water level sensing signal line, a first through hole penetrating the sensing end and the connecting end is provided on the first sensing element, a rod is provided through the first through hole; the sensing end of the first sensing element is used to detect a water level at a height in the water container to be measured, and the rod is a plastic water inlet pipe.

[0027] Furthermore, the water level sensor also includes a water level detection extension electrode, the sensing end and the connecting end are respectively shorter than the inner end and the outer end of the water inlet pipe, and are used to detect the water level in the water container to be measured; the sensing end is provided with a retaining ring; and the connecting end is provided with a fastening device for fixing it to the wall of the water container to be measured.

[0028] The water level sensor can be used to form different types of water boiling devices, including an electric kettle and an electric tea art stove, a tea bar machine, an electric water boiler, a coffee machine or a juicer.

[0029] Since the detection control circuits of these sensors are not the technical problem to be solved by the present invention, they will not be described in detail here.

[0030] Compared with the prior art, the beneficial effect of the utility model is that only one hole is needed to be installed on the water container to be tested for similar purposes such as a kettle, and the high and low water levels can be reliably detected in a small working space, pressurized, closed, high temperature and high humidity environment, and even the temperature can be measured at the same time. It has reliable performance, simple installation, low cost, and can be installed in different positions, which can effectively prevent dry burning and overflow, and provide a measurement and control basis for the intelligent control of water containers to be tested for similar purposes such as kettles. As an expansion of the new use of the first basic technical solution, the rod is made into a hollow water inlet pipe or a hollow plastic water pipe sensor fixing component can be used to implement many intelligent controls such as automatic control of water addition, small amount of quantitative water addition, water shortage prevention of dry burning and automatic water replenishment on the water container to be tested from any position on the side wall (including the handle position of the electric kettle). BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic cross-sectional view of the structure of Embodiment 1 of the present utility model;

[0032] Figure 2 This is a schematic diagram of the structure of the first sensing element of Example 1 of the utility model;

[0033] Figure 3 This is a schematic diagram of the structure of the second sensing element of Example 1 of the utility model;

[0034] Figure 4 This is a schematic diagram of the installation of Embodiment 2 of the present utility model;

[0035] Figure 5 This is a schematic diagram of the installation of Embodiment 3 of the present utility model;

[0036] Figure 6 This is a schematic diagram of the installation of Embodiment 4 of the present utility model;

[0037] Figure 7 This is a schematic diagram of the installation of Embodiment 5 of the present utility model;

[0038] Figure 8 This is a schematic diagram of the installation of Example 6 of the utility model;

[0039] Fig. 9 This is a schematic diagram of the installation structure with nuts in Embodiments 6 and 7 of the utility model;

[0040] Fig.10 This is a schematic diagram of the structure of the second induction element of Example 7 of the utility model;

[0041] Fig.11 Shown is a schematic diagram of a water level sensor whose rod is a hollow upper water inlet pipe. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0043] It should be noted that when a component / part is referred to as being "set on" another component / part, it may be directly set on the other component / part or there may also be an intermediate component / part. When a component / part is referred to as being "connected / coupled" to another component / part, it may be directly connected / coupled to the other component / part or there may be an intermediate component / part at the same time. The term "connection / coupling" as used herein may include electrical and / or mechanical physical connections / couplings. The term "includes / comprising" as used herein refers to the presence of a feature, step or component / part, but does not exclude the presence or addition of one or more other features, steps or components / parts. The term "and / or" as used herein includes any and all combinations of one or more relevant listed items.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0045] In addition, in the description of this application, the terms "first", "second", etc. are only used for descriptive purposes and to distinguish similar objects. There is no order of precedence between the two, and they cannot be understood as indicating or implying relative importance. In addition, in the description of this application, unless otherwise specified, the meaning of "plurality" is two or more. Example

[0046] See also Figures 1 to 10 As shown, a water level sensor includes a first sensing member 1 and a rod member serving as a second sensing member 2. The first sensing member 1 and the second sensing member 2 both have sensing ends and connecting ends connected to each other as a whole. The connecting end 11 of the first sensing member is used to pass through the measured water container and connect to its corresponding water level sensing signal line, so that it can sense the water level of the measured water container 6. A first liquid-tight insulating layer 3 is provided on the outer wall of the connecting end 11 of the first sensing member. The first liquid-tight insulating layer 3 is made of a food-grade silicone sleeve, and can also be made of a food-grade Teflon or PP tube, or can be made of an insulating, liquid-tight, high-temperature resistant food-grade coating, and is used for electrical insulation and to prevent the connecting end 11 of the first sensing member from being corroded by water or scaled, thereby affecting the reliability of its monitoring.

[0047] A first through hole 5 penetrating the sensing end and the connecting end is provided on the first sensing element 1. The connecting end 21 of the second sensing element extends from the sensing end 12 of the first sensing element through the first through hole 5 to the bottom of the first sensing element 1, and is used to be connected to the corresponding water level sensing signal line. The sensing end 12 of the first sensing element and the sensing end 22 of the second sensing element are respectively used to detect the water level of the corresponding height in the measured water container 6.

[0048] A second liquid-tight insulating layer 4 for liquid-tightness and electrical insulation with the first sensing element 1 is provided on the connecting end 21 of the second sensing element. The second insulating layer 4 can also be a food-grade silicone sleeve, or a food-grade Teflon or PP tube, or can be made by coating with insulating, liquid-tight, high-temperature resistant food-grade paint.

[0049] The first sensing member 1 is a hollow metal pipe, preferably a hollow rivet-like structural member, which is cheap and practical and can greatly reduce production costs. The second sensing member 2 is a solid metal pipe, preferably a solid stainless steel rod, or other metal rods. The second sensing member 2 can also be a hollow cylindrical metal tube. The second sensing member 2 is made into a hollow metal tube, and a temperature sensor 23 can be hidden inside it to form a three-in-one composite sensor of high and low water levels and temperature. It is used in closed, small space, high humidity electric kettles and other occasions. It only needs to open a mounting hole on the electric heating base or the side wall of the kettle body to realize high and low water level and water temperature measurement and control. It has the advantages of simple structure, low installation and manufacturing cost, accurate measurement and control, and easy adjustment.

[0050] The first sensing end 12 and the second sensing end 22 are made of metal, preferably silver, titanium, or stainless steel. If silver is used, it can also sterilize. Of course, other metal materials with corresponding functions can also be used. Example

[0051] See also Figure 4 As shown, the technical features of this embodiment 2 are the same as those recorded in the embodiment 1, and will not be described in detail here. The specific difference is that the first sensing element 1 is vertically fixed on the bottom of the measured water container 6 when in use, and the sensing end 12 of the first sensing element is used to measure and control the low water level in the measured water container 6, and the sensing end 22 of the second sensing element is located above the sensing end 12 of the first sensing element, and is used to measure and control the high water level in the measured water container 6. In this embodiment, the measured water container 6 only needs to open a hole at the bottom, which reduces one hole, reduces the risk of water leakage and leakage, simplifies the process of installing the sensor on the measured water container 6, and can meet the needs of detecting high and low water levels. Example

[0052] See also Figure 5 As shown, the technical features of this embodiment 3 are the same as those of the above embodiments, which will not be described in detail here. The specific difference is that the connection end 11 of the first sensing element is connected to the side wall of the water container 6 to be tested, the sensing end 12 of the first sensing element is used to measure and control the low water level in the water container 6 to be tested, and the sensing end 22 of the second sensing element is bent upward by 90 degrees and extended to measure and control the high water level in the water container to be tested. In this embodiment, the water level in the water container 6 to be tested can also be detected, and it can also avoid opening a hole at the bottom of the water container 6 to be tested. The most important thing is that after boiling water, scale is mostly formed at the bottom of the water container 6 to be tested, and installing it on the side wall can avoid the influence of scale to a greater extent, thereby improving the sensitivity of detection. Example

[0053] See also Figure 6 As shown, the technical features of this embodiment 4 are the same as those of the embodiment 3, and will not be described in detail here. The specific difference is that the connection end 11 of the first sensing element 1 is connected to the side wall of the water container 6 to be tested, and the sensing end 12 of the first sensing element 1 is in the upper position, which is used to measure and control the high water level in the water container to be tested, and the sensing end 22 of the second sensing element 2 is bent downward by 90 degrees and extended, which is used to measure and control the low water level in the water container to be tested. In this embodiment, the water level in the water container 6 to be tested can also be detected, and it can also avoid opening a hole at the bottom of the water container 6 to be tested. The most important thing is that after boiling water, scale is mostly formed at the bottom of the water container 6 to be tested, and installing it on the side wall can avoid the influence of scale to a greater extent, thereby improving the sensitivity of detection. Example

[0054] See also Figure 7 , 10 As shown, the technical features of this embodiment 5 are the same as those of the above embodiments, which will not be described in detail here. The specific differences are: the connection end 11 of the first sensing element 1 is connected to the side wall of the water container 6 to be tested, and the specific connection point is set on the side wall near the top of the water container 6 to be tested. The sensing end 12 of the first sensing element 1 extends to the bottom of the pot through a metal extension wire 9 (a silicone hose can be tied to the outside to play the role of easy cleaning, corrosion prevention and insulation) to sense the low water level in the water container to be tested. The connection end 21 of the second sensing element 2 is inserted and fixed on the first sensing element connection end 11 through the first through hole 5, and the sensing end 22 of the second sensing element 2 is used to sense the high water level in the water container 6 to be tested. In this embodiment, the water level in the water container to be tested can also be detected, and it can also avoid opening a hole at the bottom of the water container to be tested. The most important thing is that after boiling water, scale is mostly formed at the bottom of the water container 6 to be tested, and installing it on the side wall can avoid the influence of scale to a greater extent, thereby improving the sensitivity of detection. Example

[0055] See also Figure 8 and Fig. 9 As shown, the technical features of this embodiment 6 are the same as those of the above embodiments, which will not be described in detail here. The specific difference is that: a fastening thread, an insulating seal 8 and a nut 7 are provided at the connection end 11 of the first sensor, and a water level signal line lead-out terminal 10 is provided between the insulating seal 8 and the nut 7; in addition, a fastening thread, an insulating seal 8 and a nut 7 can be provided at the connection end 21 of the second sensor, and a water level signal line lead-out terminal 14 can be provided between the insulating seal 8 and the nut 7. In this embodiment, the connection end 11 of the first sensor 1 or the connection end 21 of the second sensor can be provided with a fastening thread, a nut 7 and an insulating seal 8, or both can be provided with a fastening thread, a nut 7 and an insulating seal 8. Example

[0056] Please refer to Fig. 9 and Fig.10As shown, the technical features of this embodiment 7 are the same as those of the above embodiments, and no further elaboration is given here. The specific difference is that the second sensing member 2 is a hollow tube structure. A temperature sensor 13 such as a thermistor is hidden in the hollow tube, and the signal line 131 of the temperature sensor 13 is led out from the tail of the connecting end 21 of the second sensing member 2. The sensing end of the second sensing member and its body are two bodies (of course, they can also be integrated). The sensing end is a cylindrical nut or screw with a top seal, and the corresponding connecting end of its body is a screw or nut. The body is stationary, and the sensing end is telescopic and adjustable, forming a water level depth measurement and control regulator. Specifically, the sensing end 22 of the second sensing member 2 is movably connected to the hollow tube body thereof through a thread, which is very beneficial for accurate measurement and control. The sensing end 22 can be a ball head nut 15 with an opening at one end or a T-shaped nut 16 with an opening at one end. The connecting end 21 of the second sensing member 2 can be connected to the nut 7, and the signal line lead-out terminal 10 is crimped with the nut 7. The advantage of this structure is that the sensing end 22 of the second sensing element can adjust and control the sensed water level according to demand through the inner depth of the nut, thereby reducing errors and reducing the debugging cost and difficulty of electromechanical manufacturing.

[0057] The first sensing element 1 and the second sensing element 2 are electrically insulated and liquid-tightly separated from each other. The top portion thereof serves as a sensing end 12 for sensing the water level, and the bottom portion serves as a connecting end 11 for leading a signal line out of the measured water container. Fig. 9 From the bottom of the electric kettle as the water container to be tested downward, an insulating sealing pad 8, a water level signal line lead-out terminal 10 and a nut 7 are sequentially tied on the connecting end 11, and the water level signal is finally led out from the lead-out terminal 10; an insulating sealing pad 8, a water level signal line lead-out terminal 14 and a nut 7 are also sequentially tied on the connecting end 21 of the second sensing element 2 passing through the hollow tube of the connecting end 11, and similarly, the water level signal is finally led out from the lead-out terminal 14.

[0058] Fig.10 The insulating sealing pad 8 and the water level signal line lead-out terminal 10 are omitted.

[0059] Since the first sensing element 1 and the second sensing element 2 are both made of conductive metal, the water level signal line does not need to be led out through the water level signal line lead-out terminal, but can be directly led out from their respective connection ends. Example

[0060] See attached Fig.11As another embodiment, the water level sensor includes a first sensing member 1, the first sensing member has a sensing end 12 and a connecting end 11 which are connected to each other as a whole, the connecting end 11 of the first sensing member is used to pass through the water container to be measured (through a silicone sealing ring 18 and a side wall 17 of the water container to be measured) and connect with a corresponding water level sensing signal line, a first through hole 5 penetrating the sensing end and the connecting end is provided on the first sensing member, and a rod 2 is provided through the first through hole 5; the sensing end and the connecting end of the first sensing member 1 are used to detect the water level in the water container to be measured, and the sensing end 12 of the first sensing member 1 is used to detect a water level at a height in the water container to be measured. The rod is a plastic water inlet pipe 16, and the sensing end and the connecting end of the first sensing element 1 are shorter than the inner end 161 and the outer end 162 of the water inlet pipe respectively, so that the inner end 161 grows out of the sensing end of the first sensing element 1 in the water container to be tested, and the outgoing water will not touch the sensing end; the outer end 162 grows out of the connecting end of the first sensing element 1 outside the water container to be tested, and the water inlet pipe is easy to connect, and the incoming water will not touch the connecting end. The function of the water inlet pipe 16 is to be used for high-level water addition (water replenishment) to the water container 6 to be tested through its side wall 17 and handle. It is safer than bottom water supply and is not easy to leak water and electricity. It is more hygienic and dustproof than top water supply. In this embodiment, as an implementation method, in order to accurately control the positioning and installation of the water level sensor (for glass kettles, the hole position cannot be adjusted once it is made, and for stainless steel kettles, a hole can be added, but due to the characteristics of stainless steel and space limitations, the hole is difficult to modify or re-drill), welding a water level detection extension electrode 19 on the sensing end 12 is a good solution, of course, it can also be as Fig.11 As shown, it is very convenient to install by electrically short-circuiting the first sensing element 1 and crimping an extended electrode 19. The diameter of the sensing end 12 is made larger than the pipe diameter to form a retaining ring 121. The retaining ring 121 can not only detect the water level, but also limit the position. It can also crimp the sealing ring, the extended electrode 19 and the water level sensing signal output terminal on the connecting end 11 and lock them with a false nut. Example

[0061] See attached Fig.11 As another implementation, when the water level sensor needs to detect high and low water levels and realize water on the side wall 17, the sensing end 12 of the first sensing element 1 in Example 8 can be used as a high water level electrode, and the extended electrode 19 can be changed to a design that is electrically insulated and open from the first sensing element 1 (the signal of the extended electrode 19 is led out from a suitable position such as the pipe wall through the extended electrode signal line 192 to which it is connected, which is very easy and will not be elaborated on). In this way, the extended electrode 19 can be used as a low water level electrode, killing two birds with one stone, with dual uses.

[0062] From the description of the above-mentioned embodiment 1 to embodiment 9, it can be seen that the utility model has a simple and ingenious structure. The first sensing element 1 and the second sensing element 2 are combined, which can not only reduce the drilling in the manufacturing process of the measured water container, but also the first sensing element 1 and the second sensing element 2 can be installed on the side wall 17 of the measured water container, and can freely switch the sensing of high and low water levels. Even if the bottom of the measured water container is scaled, it will not affect the sensitivity and reliability of the water level sensor, and more effectively avoid the dry burning and overflow of the measured water container. The technical solution of water supply from the kettle wall or the handle can better solve the problems of sealing difficulty, easy leakage and short circuit of the water supply of the coupler at the bottom of the kettle.

[0063] The water measuring container formed by the above-mentioned various water level sensors includes but is not limited to an electric kettle, and also includes a tea art stove, a tea bar machine, an electric water heater, a water dispenser, and a juicer formed by the electric kettle.

[0064] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A water level sensor, characterized in that: The invention comprises a first sensing member, wherein the first sensing member comprises a sensing end and a connecting end which are connected to each other as an integral whole, a first liquid-tight insulating layer is arranged on the outer wall of the connecting end of the first sensing member, the connecting end of the first sensing member is used to pass through the measured water container and connect with the corresponding water level sensing signal line, a first through hole which passes through the sensing end and the connecting end is arranged on the first sensing member, a rod is arranged to pass through the first through hole in a liquid-tight and mutually insulated manner; the sensing end of the first sensing member is used to detect a water level at a height in the measured water container.

2. The water level sensor according to claim 1, characterized in that: The rod member is a second sensing member, which also has a sensing end and a connecting end which are connected to each other as a whole. A second liquid-tight insulating layer is provided on the connecting end of the second sensing member for liquid-tightness and electrical insulation with the first sensing member. The connecting end of the second sensing member extends from the sensing end of the first sensing member through the first through hole to the bottom of the first sensing member, and is used to be connected to the corresponding water level sensing signal line. The sensing end of the first sensing member and the sensing end of the second sensing member are respectively used to detect water levels at two relative heights in the measured water container.

3. The water level sensor according to claim 2, characterized in that: When in use, the first sensing element is vertically fixed on the bottom of the water container to be measured. The sensing end of the first sensing element is used to measure and control the low water level in the water container to be measured. The sensing end of the second sensing element is located above the sensing end of the first sensing element and is used to measure and control the high water level in the water container to be measured.

4. The water level sensor according to claim 2, characterized in that: The connecting end of the first sensing element is connected to the side wall of the water container to be measured, and the sensing end of the first sensing element is used to measure and control the low water level or high water level in the water container to be measured. The sensing end of the second sensing element is electrically connected upward or downward to a second extended sensing end, which is used to measure and control the high water level or low water level in the water container to be measured.

5. The water level sensor according to claim 2, characterized in that: The connecting end of the first sensing element is connected to the side wall of the water container to be measured, and the sensing end of the first sensing element is electrically connected upward or downward to a first extended sensing end for measuring and controlling the high water level or the low water level in the water container to be measured, and the sensing end of the second sensing element is opposite to the first extended sensing end, and is used to measure and control the low water level or the high water level in the water container to be measured.

6. The water level sensor according to any one of claims 2 to 4, characterized in that: The first induction component is a hollow metal pipe, and the second induction component is a solid or hollow metal pipe.

7. The water level sensor according to claim 6, characterized in that: The first induction component is a hollow rivet-shaped component, and the second induction component is a solid or hollow cylindrical metal component.

8. The water level sensor according to claim 6, characterized in that: The sensing end of the first sensing element and the sensing end of the second sensing element are made of any one of stainless steel, silver, and titanium metals; the sensing end of the second sensing element and its body are two bodies, the sensing end is a columnar nut or screw with a sealed top, and the corresponding connecting end of its body is a screw or nut, the body is stationary, and the sensing end is telescopic and adjustable, forming a water level depth measurement and control regulator.

9. The water level sensor according to claim 6, characterized in that: The first liquid-tight insulating layer and the second liquid-tight insulating layer are food-grade silicone, Teflon, PP tube or coating layer.

10. The water level sensor according to claim 6, characterized in that: The connection end of the first sensing element is provided with a fastening thread, an insulating sealing gasket and a nut, and a water level signal line lead-out terminal is provided between the insulating sealing gasket and the nut.

11. The water level sensor according to claim 6, characterized in that: A fastening thread, an insulating sealing gasket and a nut are arranged on the connecting end of the second sensing element, and a water level signal line lead-out terminal is arranged between the insulating sealing gasket and the nut.

12. The water level sensor according to claim 6, characterized in that: The second sensing element is a hollow metal tube, in which a temperature sensor is arranged, forming a three-in-one composite sensor of high and low water levels and temperature.

13. The water level sensor according to claim 1, characterized in that: The rod is a water inlet pipe.

14. The water level sensor according to claim 13, characterized in that: The water inlet pipe is a plastic pipe.

15. A water level sensor, characterized in that: The water level sensor includes a first sensing element, which has a sensing end and a connecting end that are connected to each other as a whole. The connecting end of the first sensing element is used to pass through the water container to be measured and connect to the corresponding water level sensing signal line. A first through hole penetrating the sensing end and the connecting end is provided on the first sensing element, and a rod is provided in the first through hole. The sensing end of the first sensing element is used to detect a water level at a height in the water container to be measured, and the rod is a plastic water inlet pipe.

16. The water level sensor according to claim 15, characterized in that: It also includes a water level detection extension electrode, the sensing end and the connecting end are respectively shorter than the inner end and the outer end of the water inlet pipe, and are used to detect the water level in the water container to be tested; the sensing end is provided with a retaining ring; the connecting end is provided with a fastening device for fixing it on the wall of the water container to be tested.

17. A water boiling device using the water level sensor according to any one of claims 1 to 16, characterized in that: The water boiling device is an electric kettle or an electric tea art stove, a tea bar machine, an electric water boiler, a coffee machine or a juice machine constructed with an electric kettle.

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