Water level sensor and water boiling device formed by same

Abstract

The invention 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 present invention relates to the technical field of sensors, and particularly to a water level sensor and a water boiling device constituted thereby. Background Art

[0002] The water boiling device mentioned in this patent application specifically refers to electric kettles and electrical appliances such as tea art stoves, tea bar machines, electric water heaters, water dispensers, and juice machines that require precise measurement and control of the water level or water capacity in a high-temperature, humid, and enclosed small space. It includes a water container that necessarily measures 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 those who love drinking tea, and the water container is the electric kettle for boiling water. The water containers mentioned here are made of stainless steel, glass, or ceramic. Some water containers exist in the form of kettles or electric heating tanks, and some exist in the form of water tanks or water storage tanks.

[0003] In the existing water containers to be measured, if it is necessary to monitor the water level in the water container to be measured, prevent dry burning due to water shortage, prevent overflow, and perform intelligent quantitative water addition, it is necessary to add a water level sensor that can measure the water level, and even a temperature sensor, in the water container to be measured.

[0004] However, currently common water level sensors are divided into low water level sensors and high water level sensors. They can be used in combination or alone. A physical component of them is an induction probe, usually made of a stainless steel rod. The low water level sensor is used to detect that the water level in the water container to be measured is too low, with the purpose of preventing dry burning or realizing automatic water addition; the high water level sensor is used to detect that the water level in the water container to be measured is too high, with the purpose of preventing overflow when adding water under any circumstances, especially when the water is boiling. When the water container to be measured currently needs to be equipped with water level sensors for high and low water level measurement and control, two installation holes must be opened on the bottom and / or side wall of the water container to be measured, and the low water level sensor and the high water level sensor are respectively installed. Due to the narrow working space, pressurized, enclosed, high-temperature, and high-humidity environment (especially an environment where boiling water vapor fills the water container to be measured and there is serious water scale) of the water container to be measured such as an electric kettle, this makes it more difficult in the manufacturing process and measurement and control of the water container to be measured. Especially after the existing water level sensor is used for a period of time, because it is in the water container to be measured and is a bare steel rod, the surface is extremely easy to form water scale, thereby reducing the induction sensitivity and losing the function of sensing the water level, resulting in the control failure of the water container to be measured, and even electrical short circuit, endangering the life and safety of the person and the water boiling device. Summary of the Invention

[0005] The object of the present invention is to provide a water boiling device suitable for use in electric kettles and the like, which can reliably detect high and / or low water levels, and even measure temperature simultaneously, in a narrow working space, under pressure, in a sealed, high-temperature and high-humidity environment, as well as a water level sensor and a water boiling device composed thereof.

[0006] The primary object of the present invention is to provide a water level sensor with a compact structure, small size, easy installation, low cost and reliability.

[0007] The second object of the present invention is to provide a triple-composite water level and temperature sensor with a compact structure, small size, easy installation, low cost and capable of accurately measuring temperature within an extremely small space structure of the above-mentioned water level sensor.

[0008] The third object of the present invention is to provide a water level sensor capable of adding water at a high position on the wall or handle.

[0009] The fourth object of the present invention is to provide a water boiling device composed of the above-mentioned water level sensor.

[0010] To achieve the above object, the present invention 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 connected integrally, a first liquid-sealed 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 penetrate out of the measured water container and be connected to 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 member, and a rod member is hermetically and insulatingly arranged in the first through hole; the sensing end of the first sensing member is used to detect the water level at a certain height in the measured water container.

[0012] The rod member is a second sensing member, the second sensing member also has a sensing end and a connecting end connected integrally, a second liquid-sealed insulating layer for liquid-sealing and electrically insulating with the first sensing member is provided on the connecting end of the second sensing member, the connecting end of the second sensing member extends out of the bottom of the first sensing member through the first through hole from the sensing end of the first sensing member, and is used to be connected to its corresponding water level sensing signal line, and the sensing ends of the first sensing member and the second sensing member are respectively used to detect the water levels at two relative heights in the measured water container.

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

[0014] Preferably, the connecting end of the first sensing member is connected to the side wall of the water container to be measured, and the sensing end of the first sensing member 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 member is electrically connected to an upward or downward second extended sensing end for measuring and controlling the high water level or low water level in the water container to be measured.

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

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

[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 ends of the first sensing member and the second sensing member are made of a metal of any one of stainless steel, silver, and titanium; the sensing ends of the first sensing member and the second sensing member are made of a metal of any one of stainless steel, silver, and titanium; the sensing end of the second sensing member is separate from its body. The sensing end is a columnar nut or screw with a sealed top end, and the corresponding connecting end of its body is a screw or nut. The body is stationary, and the sensing end is telescopically adjustable to form a water level depth measurement and control regulator.

[0019] Preferably, the first liquid-sealed insulating layer and the second liquid-sealed insulating layer are food-grade silica gel, Teflon, PP pipes, or coating layers.

[0020] Preferably, the connecting end of the first sensing member is provided with a fastening thread, an insulating gasket, and a nut, and a water level signal wire lead-out terminal is provided between the insulating gasket and the nut.

[0021] Preferably, the connecting end of the second sensing member is provided with a fastening thread, an insulating gasket, and a nut, and a water level signal wire lead-out terminal is provided between the insulating gasket and the nut.

[0022] Preferably, the connecting end of the second sensing member is provided with a fastening thread, an insulating gasket, and a nut, and a water level signal wire lead-out terminal is provided between the insulating gasket and the nut.

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

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

[0025] As another implementation mode:

[0026] A water level sensor, the water level sensor includes a first sensing member, the first sensing member has a sensing end and a connecting end connected integrally, the connecting end of the first sensing member is used to penetrate out of the water container to be measured and connect with its corresponding water level sensing signal wire, a first through hole penetrating the sensing end and the connecting end is provided on the first sensing member, and a rod member is penetrated and arranged in the first through hole; the sensing end of the first sensing member is used to detect the water level at a certain height in the water container to be measured, and the rod member is a plastic water inlet pipe.

[0027] Furthermore, the water level sensor further 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; a retaining ring is provided at the sensing end; a fastening device for fixing it on the wall of the water container to be measured is provided on the connecting end.

[0028] Using the water level sensor can constitute different types of boiling water devices, including any one of an electric kettle and an electric tea art stove, tea bar machine, electric water heater, coffee machine or juice machine constituted by it.

[0029] Since the detection and control circuits of these sensors are not the technical problems to be solved by the present invention, they will not be elaborated here.

[0030] Compared with the prior art, the beneficial effects of the present invention are that only one hole position is required when installing on a water container to be measured such as a kettle, and it can reliably detect the high and low water levels in a narrow working space, pressurized, airtight and high-temperature and high-humidity environment, and can even measure the temperature at the same time. It has reliable performance, simple installation, low cost, and can be installed at different positions, effectively preventing dry burning and water overflow, and providing a measurement and control basis for the intelligent control of water containers to be measured such as kettles. As an expansion of the new use of the first basic technical solution, making the rod member into a hollow water inlet pipe or using a sensor fixing member of a hollow plastic water inlet pipe can be used to automatically control water addition, small amount of quantitative water addition, dry burning prevention due to water shortage and automatic water replenishment, etc. for the water container to be measured from any position on the side wall (including the handle position of an electric kettle). Description of the Drawings

[0031] Figure 1 It is a cross-sectional structural schematic diagram of Embodiment 1 of the present invention;

[0032] Figure 2 It is a structural schematic diagram of the first sensing member of Embodiment 1 of the present invention;

[0033] Figure 3 It is a structural schematic diagram of the second sensing member of Embodiment 1 of the present invention;

[0034] Figure 4Schematic diagram of the installation for Embodiment 2 of the present invention;

[0035] Figure 5 Schematic diagram of the installation for Embodiment 3 of the present invention;

[0036] Figure 6 Schematic diagram of the installation for Embodiment 4 of the present invention;

[0037] Figure 7 Schematic diagram of the installation for Embodiment 5 of the present invention;

[0038] Figure 8 Schematic diagram of the installation for Embodiment 6 of the present invention;

[0039] Figure 9 Schematic diagram of the installation structure with nuts in Embodiments 6 and 7 of the present invention;

[0040] Figure 10 Schematic diagram of the second sensing member in Embodiment 7 of the present invention;

[0041] Figure 11 The figure shows a schematic diagram of a water level sensor with a hollow upper inlet pipe as the rod member. Detailed implementation manners

[0042] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a 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 "disposed on" another component / part, it can be directly disposed 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 can be directly connected / coupled to the other component / part or there may be an intermediate component / part at the same time. The term "connected / coupled" used herein may include electrical and / or mechanical physical connection / coupling. The term "comprising / including" used herein refers to the presence of features, steps or components / parts, but does not exclude the presence or addition of one or more other features, steps or components / parts. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field 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, terms such as "first" and "second" are only used for descriptive purposes and to distinguish similar objects. There is no sequence between them, nor can they be understood as indicating or implying relative importance. In addition, in the description of this application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0046] Embodiment 1

[0047] Please refer to Figures 1 to 10 As shown, a water level sensor includes a first sensing member 1 and a rod as the second sensing member 2. Both the first sensing member 1 and the second sensing member 2 have a sensing end and a connecting end connected to each other as a whole. The connecting end 11 of the first sensing member is used to pass out of 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-sealed insulating layer 3 is provided on the outer wall of the connecting end 11 of the first sensing member. The first liquid-sealed insulating layer 3 is made of a food-grade silicone sleeve, and can also be made of food-grade Teflon or PP pipe, or can also be made by coating with an insulating, liquid-tight, and high-temperature-resistant food-grade coating, which is used for electrical insulation and to prevent the connecting end 11 of the first sensing member from being corroded by water or scaling, thus affecting the reliability of its monitoring.

[0048] A first through hole 5 penetrating the sensing end and the connecting end is provided on the first sensing member 1. The connecting end 21 of the second sensing member extends from the sensing end 12 of the first sensing member through the first through hole 5 to the bottom of the first sensing member 1, and is used to connect to its corresponding water level sensing signal line. The sensing end 12 of the first sensing member and the sensing end 22 of the second sensing member are respectively used to detect the water level at the corresponding height in the measured water container 6.

[0049] A second liquid-sealed insulating layer 4 for liquid-sealing and electrical insulation with the first sensing member 1 is provided on the connecting end 21 of the second sensing member. The second insulating layer 4 can also be a food-grade silicone sleeve, or food-grade Teflon or PP pipe, or can also be made by coating with an insulating, liquid-tight, and high-temperature-resistant food-grade coating.

[0050] The first sensing member 1 is a hollow metal pipe fitting, preferably a hollow rivet-like structural member, which is cheap and practical and can greatly reduce the production cost. The second sensing member 2 is a solid metal pipe fitting, preferably a solid stainless steel rod, or can also be other metal rods. The second sensing member 2 can also be a hollow cylindrical metal pipe. By making the second sensing member 2 into a hollow metal pipe, a temperature sensor 23 can also be hidden inside it to form a three-in-one composite sensor for high and low water levels and temperature. When it is used in occasions such as sealed, small-space, and high-humidity electric kettles, only one installation hole needs to be opened on the electric heating chassis or the side wall of the kettle body to achieve the measurement and control of high and low water levels and water temperature, which has the advantages of simple structure, low installation and manufacturing costs, accurate measurement and control, and easy adjustment.

[0051] The sensing ends 12 of the first sensing element and 22 of the second sensing element are made of metal, preferably one of silver, titanium, and stainless steel. If silver is used, it can also play a role in sterilization. Of course, it can also be other metal materials with corresponding functions.

[0052] Embodiment 2

[0053] Please refer to Figure 4 As shown, the technical features described in this Embodiment 2 are the same as those in Embodiment 1, and will not be elaborated here. The specific difference is that when the first sensing element 1 is in use, it is vertically fixed at the bottom of the water container 6 to be measured. 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 measured, 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 water container 6 to be measured. In this embodiment, only one hole needs to be opened at the bottom of the water container 6 to be measured, reducing one opening, lowering the risk of water leakage and electric leakage, simplifying the process of installing the sensor on the water container 6 to be measured, and being able to meet the requirement of detecting high and low water levels.

[0054] Embodiment 3

[0055] Please refer to Figure 5 As shown, the technical features described in this Embodiment 3 are the same as those in the above embodiments, and will not be elaborated 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 measured. 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 measured, and the sensing end 22 of the second sensing element extends upward by bending 90 degrees and is used to measure and control the high water level in the water container to be measured. In this embodiment, the water level in the water container 6 to be measured can also be detected, and the need to open a hole at the bottom of the water container 6 to be measured can be avoided. Most importantly, after boiling water, scale is mostly formed at the bottom of the water container 6 to be measured. By installing it on the side wall, the influence of scale is avoided to a greater extent, thereby improving the detection sensitivity.

[0056] Embodiment 4

[0057] Please refer to Figure 6As shown in the figure, the technical features described in Embodiment 4 are the same as those in Embodiment 3, and will not be elaborated here. The specific difference lies in that: the connecting end 11 of the first sensor 1 is connected to the side wall of the water container 6 to be measured, and the sensing end 12 of the first sensor 1 is in the upper position for measuring and controlling the high water level in the water container to be measured. The sensing end 22 of the second sensor 2 extends downward by bending 90 degrees for measuring and controlling the low water level in the water container to be measured. In this embodiment, the water level condition in the water container 6 to be measured can also be detected, and the need to open holes at the bottom of the water container 6 to be measured can be avoided. Most importantly, after boiling water, scale is mostly formed at the bottom of the water container 6 to be measured. By installing on the side wall, the influence of scale can be avoided to a greater extent, thereby improving the detection sensitivity.

[0058] Embodiment 5

[0059] Please refer to Figure 7 、 10 As shown in the figure, the technical features described in Embodiment 5 are the same as those in the above embodiments, and will not be elaborated here. The specific difference lies in that: the connecting end 11 of the first sensor 1 is connected to the side wall of the water container 6 to be measured, and the specific connection point is set on the side wall near the top of the water container 6 to be measured. The sensing end 12 of the first sensor 1 extends towards the bottom of the kettle through a metal extension wire 9 (which can be sleeved with a silica gel hose outside, playing the roles of easy cleaning, anti-corrosion and insulation) for sensing the low water level in the water container to be measured. The connecting end 21 of the second sensor 2 is inserted and fixed on the connecting end 11 of the first sensor through the first through hole 5, and the sensing end 22 of the second sensor 2 is used for sensing the high water level in the water container 6 to be measured. In this embodiment, the water level condition in the water container to be measured can also be detected, and the need to open holes at the bottom of the water container to be measured can be avoided. Most importantly, after boiling water, scale is mostly formed at the bottom of the water container 6 to be measured. By installing on the side wall, the influence of scale can be avoided to a greater extent, thereby improving the detection sensitivity.

[0060] Embodiment 6

[0061] Please refer to Figure 8 and Figure 9 As shown in the figure, the technical features described in Embodiment 6 are the same as those in the above embodiments, and will not be elaborated here. The specific difference lies in that: the connecting end 11 of the first sensor is provided with a fastening thread, an insulating gasket 8 and a nut 7, and a water level signal wire lead-out terminal 10 is provided between the insulating gasket 8 and the nut 7; in addition, the connecting end 21 of the second sensor can also be provided with a fastening thread, an insulating gasket 8 and a nut 7, and a water level signal wire lead-out terminal 14 is provided between the insulating gasket 8 and the nut 7. In this embodiment, either the connecting end 11 of the single first sensor 1 or the connecting end 21 of the second sensor can be provided with a fastening thread, a nut 7 and an insulating gasket 8, or both can be provided with a fastening thread, a nut 7 and an insulating gasket 8.

[0062] Example 7

[0063] Please refer to Figure 9 and Figure 10 As shown, Example 7 has the same technical features as those described in the above examples, and will not be elaborated here. The specific difference is that the second sensing element 2 is a hollow tube structure. A temperature sensor 13 such as a thermistor is hidden in the hollow tube. The signal wire 131 of the temperature sensor 13 is led out from the tail of the connection end 21 of the second sensing element 2. The sensing end of the second sensing element is separate from its body (of course, it can also be integrated). The sensing end is a columnar nut or screw with a sealed top end, and the corresponding connection end of its body is a screw or nut. The body is stationary, and the sensing end is telescopically adjustable, forming a water level depth measurement and control regulator. Specifically, the sensing end 22 of the second sensing element 2 is movably connected to its hollow tube body by threads, which is beneficial for precise measurement and control. The sensing end 22 can be a ball head nut 15 with one end open or a T-shaped nut 16 with one end open. The connection end 21 of the second sensing element 2 can be connected to the nut 7, and the nut 7 is used to press and connect the signal wire lead-out terminal 10. 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 requirements by the inner depth of the nut, reducing errors and the debugging cost and difficulty of electromechanical manufacturing.

[0064] The first sensing element 1 and the second sensing element 2 are electrically insulated and liquid-sealed from each other. Its top is used as the sensing end 12 for sensing the water level, and its bottom is used as the connection end 11 to lead out the signal wire outside the water container to be measured. Figure 9 In [description], an insulating gasket 8, a water level signal wire lead-out terminal 10, and a nut 7 are sequentially sleeved on the connection end 11 from the bottom of the kettle of the electric kettle of the water container to be measured, and the water level signal is finally led out from the lead-out terminal 10; on the connection end 21 of the second sensing element 2 passing through the hollow tube of the connection end 11, an insulating gasket 8, a water level signal wire lead-out terminal 14, and a nut 7 are also sequentially sleeved. Similarly, the water level signal is finally led out from the lead-out terminal 14.

[0065] Figure 10 The insulating gasket 8 and the water level signal wire lead-out terminal 10 are omitted in [description].

[0066] Since both the first sensing element 1 and the second sensing element 2 are metal conductive, the water level signal wire can also be led out directly from their respective connection ends without passing through the water level signal wire lead-out terminal.

[0067] Example 8:

[0068] See Appendix Figure 11, As another embodiment, the water level sensor includes a first sensing member 1. The first sensing member has a sensing end 12 and a connection end 11 that are integrally connected. The connection end 11 of the first sensing member is used to pass through the side wall 17 of the water container to be measured (through the silicone rubber sealing ring 18) and is connected to its corresponding water level sensing signal line. A first through hole 5 is provided in the first sensing member and penetrates through the sensing end and the connection end. A rod member 2 is provided through the first through hole 5; the sensing end and the connection end of the first sensing member 1 are used to detect the water level in the water container to be measured. The sensing end 12 of the first sensing member 1 is used to detect the water level at a certain height in the water container to be measured. The rod member is a plastic water inlet pipe 16. The sensing end and the connection end of the first sensing member 1 are respectively shorter than the inner end 161 and the outer end 62 of the water inlet pipe. In this way, the inner end 161 extends out of the sensing end of the first sensing member 1 in the water container to be measured, and the water outlet will not touch the sensing end; the outer end 62 extends out of the connection end of the first sensing member 1 outside the water container to be measured, which makes it easy to connect the water inlet pipe, and the water inlet will not touch the connection end. The function of the water inlet pipe 16 is to be used for high-level water filling (refilling) of the water container 6 to be measured through its side wall 17 and the handle. It is safer than bottom water filling and is not prone to water leakage and electric leakage, and is more hygienic and dust-proof than top water filling. In this embodiment, as an implementation method, in order to accurately control the positioning and installation of the water level sensor (once a glass kettle is made, the hole position cannot be adjusted. For a stainless steel kettle, holes can be matched, but due to the characteristics of stainless steel and space limitations, it is very difficult to modify or re-drill the holes), welding a water level detection extension electrode 19 on the sensing end 12 is a good solution. Of course, it can also be as Figure 11 shown. Pressing and connecting an extension electrode 19 by electrically shorting the first sensing member 1 is very convenient for installation. The diameter of the sensing end 12 is made larger than its pipe diameter to form a retaining ring 121. The retaining ring 121 can not only play a role in detecting the water level during assembly, but also play a limiting role, and can also press and connect the sealing ring, the extension electrode 19 and the water level sensing signal output terminal on the connection end 11 and the false nut for locking.

[0069] Example 9:

[0070] See the appendix Figure 11 , As yet another embodiment, when the water level sensor needs to be able to perform side wall 17 water filling while detecting high and low water levels, the sensing end 12 of the first sensing member 1 in Embodiment 8 can be used as the high water level electrode, and the extension electrode 19 can be changed to a design that is electrically insulated and open from the first sensing member 1 (the signal of the extension electrode 19 is led out from a suitable position such as between the pipe walls through the extension electrode signal line 192 connected to it. This is very easy and will not be elaborated). Thus, the extension electrode 19 can be used as the low water level electrode, killing two birds with one stone and having dual uses.

[0071] From the descriptions of the above-mentioned Embodiment 1 to Embodiment 9, it can be seen that the structure of the present invention is simple and ingenious. By combining the first sensing element 1 and the second sensing element 2, not only can the number of holes be reduced in the manufacturing process of the water container to be measured, but also the first sensing element 1 and the second sensing element 2 can be installed on the side wall 17 of the water container to be measured, and they can freely switch the sensing of high and low water levels with each other. Even if scale forms at the bottom of the water container to be measured, it will not affect the sensitivity and reliability of the water level sensor, and it can more effectively avoid the situations of dry burning and water overflow in the water container to be measured. The technical solution of water on the kettle wall or on the handle can better solve the problems of difficult sealing, easy water leakage and short circuit in the water supply of the coupler at the bottom of the kettle.

[0072] The water measuring containers composed of the above various water level sensors include, but are not limited to, electric kettles and their components for tea art stoves and tea bar machines, and also include electric water heaters, water dispensers, and juice machines. Due to space limitations, they are claimed in the claims.

[0073] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A water level sensor, characterized in that, It includes a first sensing element. The first sensing element has a sensing end and a connecting end that are integrally connected. A first liquid-sealed insulating layer is provided on the outer wall of the connecting end of the first sensing element. The connecting end of the first sensing element is used to penetrate out of the measured water container and be connected to its corresponding water level sensing signal wire. A first through hole penetrating the sensing end and the connecting end is provided on the first sensing element, and a rod is hermetically and insulatedly arranged through the first through hole; the sensing end of the first sensing element is used to detect the water level at a certain height in the measured water container.

2. The water level sensor according to claim 1, characterized in that, The rod is a second sensing element. The second sensing element also has a sensing end and a connecting end that are integrally connected. A second liquid-sealed insulating layer for liquid-sealing and electrical insulation with the first sensing element is provided on the connecting end of the second sensing element. The connecting end of the second sensing element extends out of the bottom of the first sensing element through the first through hole from the sensing end of the first sensing element, and is used to be connected to its corresponding water level sensing signal wire. The sensing ends of the first sensing element and the second sensing element are respectively used to detect the water levels at two opposite 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 measured water container. The sensing end of the first sensing element is used to measure and control the low water level in the measured water container. 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 measured water container.

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 measured water container. The sensing end of the first sensing element is used to measure and control the low water level or the high water level in the measured water container. The sensing end of the second sensing element is electrically connected upward or downward with a second extended sensing end, which is used to measure and control the high water level or the low water level in the measured water container.

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 measured water container. The sensing end of the first sensing element is electrically connected upward or downward with a first extended sensing end for measuring and controlling the high water level or the low water level in the measured water container. 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 measured water container.

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

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

8. The water level sensor according to claim 6, wherein The sensing ends of the first sensing element and the second sensing element are made of a metal such as stainless steel, silver, or titanium; the sensing end of the second sensing element is separate from its body. The sensing end is a columnar nut or screw with a sealed top end, and the corresponding connecting end of its body is a screw or nut. The body remains stationary, and the sensing end is telescopically adjustable, forming a water level depth measurement and control regulator.

9. The water level sensor according to claim 6, wherein The first liquid-sealed insulating layer and the second liquid-sealed insulating layer are food-grade silicone, Teflon, PP pipe, or coating layer.

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

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

12. The water level sensor according to claim 6, wherein The second sensing element is a hollow metal tube, inside which a temperature sensor is provided, forming a three-in-one composite sensor for high and low water levels and temperature.

13. The water level sensor according to claim 1, wherein The rod member is a water inlet pipe.

14. The water level sensor according to claim 13, wherein, 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. The first sensing element has a sensing end and a connecting end connected integrally. The connecting end of the first sensing element is used to penetrate out of the water container to be measured and connect with its corresponding water level sensing signal wire. A first through hole penetrating the sensing end and the connecting end is provided on the first sensing element, and a rod member is disposed through the first through hole; the sensing end of the first sensing element is used to detect the water level at a certain height in the water container to be measured, and the rod member is a plastic water inlet pipe.

16. The water level sensor according to claim 15, wherein It further 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; a retaining ring is provided at the sensing end; a fastening device for fixing it on the wall of the water container to be measured is provided on the connecting end.

17. A boiling water device constituted by the water level sensor according to any one of claims 1-16, characterized in that, The boiling water device is one of an electric kettle and the electric tea art furnace, tea bar machine, electric water heater, coffee machine or juice machine constituted by it.

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