Liquid heater

Abstract

The utility model discloses a liquid heater, which belongs to the technical field of household appliances and solves the problem of stability of contact and electric connection between a first component and a metal lower cover due to deformation of the lower cover after the liquid heater is produced, assembled or used for a period of time. The kettle cover is provided with a second conductive part, the kettle cover comprises an upper cover body and a bottom cover, the bottom cover comprises a third conductive part, the second conductive part is electrically conducted with the third conductive part, the third conductive part is electrically conducted with the anti-overflow electrode, the handle is provided with a first conductive part, and the second conductive part abuts against the first conductive part and is electrically conducted. According to the utility model, the long-term stability of electric conduction of the second conductive member and the third conductive member is mainly improved.

Description

Technical Field

[0001] This utility model relates to the technical field of household appliances, and in particular to a liquid heater. Background Technology

[0002] Traditional health pots pose a risk of overflowing when stewing food and producing foam. Therefore, an anti-overflow electrode is usually installed at the mouth of the pot. The anti-overflow electrode is connected to the heating plate. When foam rises and touches the anti-overflow electrode, a circuit is formed for detection. The heating power and heating on / off are then controlled based on the foam and liquid level to prevent foam from overflowing.

[0003] The spout of a health-preserving kettle is usually open, and any foam that overflows will pass through the spout. Therefore, placing the anti-overflow electrode at the spout will result in higher detection sensitivity and a higher success rate.

[0004] Existing technology CN201811617937.8 discloses an electric kettle, including a kettle body and a power base. The kettle body includes an inner liner for holding liquid, a handle located on the side of the inner liner, a bottom cover located below the inner liner, and a top cover located above the inner liner. The inner liner has an open spout. The top cover is detachably connected to the inner liner. An anti-overflow electrode is provided on the side of the top cover facing the spout, and the anti-overflow electrode covers the water outlet of the spout. The kettle also includes an electrical connection mounting base, which is divided into a first component and a second component. The first component is located on the top cover, and the second component is located on the handle. The anti-overflow electrode is electrically connected to the first component, and the second component is electrically connected to the control board. Using the above technical solution, the anti-overflow effect is good, and the kettle is safe to use.

[0005] In existing technologies, the first component is located at the handle, and the anti-overflow electrode is located at the spout, which is a considerable distance apart. This typically requires a wire connection, which is complex and generally does not meet food-grade requirements. Furthermore, a strict waterproof seal between the upper and lower lids is necessary after using the wire, hindering the commercialization of the liquid kettle and complicating the waterproofing structure. In another existing technology, the lower lid is made of metal, and the anti-overflow electrode is electrically connected to the first component through the lower lid. However, manufacturing errors exist in the components of the liquid kettle, and these errors are amplified during assembly, causing deformation of the lower lid. Additionally, the lower lid also deforms after a period of use, potentially affecting the stability of the electrical connection between the first component and the metal lower lid. Utility Model Content

[0006] The purpose of this invention is to provide a liquid heater that addresses the impact of deformation of the lower cover on the stability of the electrical connection between the first component and the metal lower cover after a period of production, assembly, or use, thus ensuring the long-term stability of the anti-overflow circuit electrical connection.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a liquid heater, comprising a kettle body, the kettle body including a kettle body and a kettle lid, the kettle body having a spout, the kettle lid being detachably fitted onto the kettle body, a handle being provided on the outer side wall of the kettle body, the kettle lid having an anti-overflow electrode, the kettle lid having a second conductive element, the second conductive element and the anti-overflow electrode being located on opposite sides of the kettle lid, the kettle lid including an upper cover and a bottom cover, the bottom cover including a third conductive element exposed toward the inner cavity of the kettle body, one end of the second conductive element being in contact with the third conductive element through an elastic element and electrically conducting, the third conductive element being in contact with the anti-overflow electrode and electrically conducting, the top of the handle having a first conductive element, the second conductive element being in contact with the first conductive element after the kettle lid is fitted onto the kettle body and electrically conducting to form an anti-overflow signal circuit.

[0008] After adopting the above technical solution, this utility model has the following advantages: An anti-overflow electrode is set on the lid, forming an anti-overflow circuit between the first conductive element, the second conductive element, the third conductive element, and the anti-overflow electrode. During liquid heating, the foam generated by the liquid quickly rises towards the mouth of the kettle and the spout until it overflows, causing the foam to contact the anti-overflow electrode and form a conductive circuit. This allows the liquid heater to receive a signal to control the heater's power to decrease or stop heating altogether, slowing down or stopping foam generation. After the heating power is reduced or heating is stopped, the generated foam will fall back downwards. To prevent foam from overflowing from the spout and the mouth of the kettle, the second and third conductive components are connected via an elastic element. When the top and bottom covers deform due to manufacturing or assembly errors or during use, the elastic element maintains contact with the second and third conductive components to a certain extent, preventing unstable connections and improving the stability of the anti-overflow function. The third conductive component is exposed to the inner cavity of the kettle; when foam generated during liquid heating comes into contact with it, an anti-overflow signal is generated, further enhancing the anti-overflow effect and stability. Furthermore, the inclusion of the third and elastic components improves the long-term stability of the electrical conduction between the second and third conductive components, thereby increasing the accuracy of the anti-overflow signal transmission. Upon detecting an anti-overflow signal, the heating element of the liquid heater immediately stops heating or reduces power, ensuring the anti-overflow effect.

[0009] Furthermore, the bottom cover is a metal cover forming the third conductive element as a whole, and the elastic element is a longitudinally installed metal spring. The bottom cover is connected to the upper cover so that after the elastic element is compressed, the bottom end abuts against the bottom cover and the top end abuts against the second conductive element to maintain electrical conductivity.

[0010] Using the aforementioned technical solution, the bottom cover is a metal cover, making the entire bottom cover form a third conductive component, increasing the stability of the connection between the third conductive component and the anti-overflow electrode. When the second and third conductive components are connected, they are connected through an elastic element, which is a compressed metal spring. The metal spring ensures electrical conductivity between the second and third conductive components. When the lid and body of the kettle deform, the length of the compressed metal spring changes with the magnitude of the deformation, ensuring the stability of the electrical conductivity between the second and third conductive components and improving the stability of the electrical connection between the metal spring and the second and third conductive components. This prevents the connection between the second and third conductive components from breaking, which would affect the anti-overflow effect. The bottom cover is a metal cover, generally made of food-grade materials such as stainless steel, which can directly contact food. This solves the problem of complex lid installation caused by the need for a waterproof structure when connecting the first and second components with wires, thus increasing the difficulty of commercializing liquid heaters. It also reduces the waterproof requirements of the lid, thereby reducing the difficulty of installation and commercializing the liquid heater. The range of foam generation is relatively random, while the bottom cover is a metal cover with a large coverage area. As long as foam rises and touches the bottom cover, it can also generate an anti-overflow signal, thereby improving the reliability of the anti-overflow function.

[0011] Furthermore, the lid has a downwardly extending ring that fits into the mouth of the pot body. A second conductive element is disposed through the ring, and an elastic element acts on the rear end of the second conductive element to make the second conductive element elastically abut against the first conductive element.

[0012] Using the aforementioned technical solution, a downward-extending ring is provided on the lid. The ring is inserted into the mouth of the pot body to improve the stability of the lid when it is closed. A second conductive element is provided through the ring to improve its stability. An elastic element abuts against the rear end of the second conductive element, allowing the second conductive element to elastically abut against the first conductive element, thus improving the stability of the electrical conduction between the first and second conductive elements. Since the ring is a thin-walled structure, its stabilizing effect on the second conductive element is limited. Therefore, the front end of the second conductive element will maintain contact and friction with the first conductive element during long-term use, inevitably causing the second conductive element to swing up and down. However, by using the elastic element to provide elastic support to the rear end of the second conductive element, the swinging of the second conductive element during the lid closing process can be eliminated, allowing the second conductive element to maintain a relatively stable state over a long period of time, ensuring the stability of the electrical conduction between the first and second conductive elements.

[0013] Furthermore, the lid is provided with an axially limiting second conductive element to prevent the second conductive element from detaching from the pressure plate of the ring body.

[0014] By adopting the aforementioned technical solution, a pressure plate is set on the lid of the pot. The pressure plate limits the second conductive element in the axial direction, preventing the second conductive element from detaching from the ring body and improving the stability of the second conductive element, thereby improving the stability of the contact and electrical connection between the second conductive element and the first conductive element.

[0015] Furthermore, the pressure plate includes an elastic arm connected to the elastic member and a spring sheet that elastically presses against the rear end of the second conductive member, with the elastic arm inserted into the top end of the elastic member.

[0016] By adopting the aforementioned technical solution, the pressure plate is configured as an elastic arm and a spring sheet, so that the spring sheet abuts against the second conductive element, allowing the second conductive element to elastically contact the first conductive element, thereby stabilizing the electrical conduction relationship between the second conductive element and the first conductive element; the provision of the elastic arm improves the stability of the connection between the pressure plate and the elastic element, and further improves the stability of the connection between the second conductive element and the third conductive element.

[0017] Furthermore, two spring pieces are laterally distributed and located on both sides of the rear end of the second conductive element to laterally limit the rear end of the second conductive element.

[0018] By adopting the aforementioned technical solution, by setting the spring sheet into two pieces and distributing the two spring sheets laterally on both sides of the rear end of the second conductive component, the second conductive component is limited on both sides of the rear end of the second conductive component, thereby improving the stability of the contact between the spring sheet and the second conductive component and preventing the second conductive component from swinging laterally.

[0019] Furthermore, the kettle lid is provided with a filter screen that extends downward and blocks the spout, and an anti-overflow electrode is located on the filter screen.

[0020] By adopting the aforementioned technical solution, a filter screen is installed at the spout to prevent liquid residue from flowing out with the liquid when pouring. The anti-overflow electrode is placed on the filter screen, reducing the number of parts and simplifying installation. Furthermore, upon detecting an anti-overflow signal, the heating element of the liquid heater immediately stops heating or reduces its heating power. Especially when heating with high power, the residual heat after the heating element stops causes foam to continue rising before settling. Often, during this process, foam may overflow from the spout. In other words, there is a certain lag between the foam's descent and the heating element stopping heating. By placing the anti-overflow electrode on the filter screen, which covers the spout, the filter screen also provides physical anti-overflow protection, preventing foam from overflowing. Simultaneously, when the liquid heater is used for normal boiling, it also prevents liquid from splashing out of the spout. This achieves multiple functions in one device, with a simple structure, fulfilling different roles at different stages and under different functions of anti-overflow.

[0021] Furthermore, the filter screen is a metal filter screen integrally formed to form the anti-overflow electrode; or, the anti-overflow electrode is integrally formed with the filter screen, and the filter screen is fixed to the bottom cover so that the anti-overflow electrode contacts the third conductive element for electrical conduction.

[0022] By adopting the aforementioned technical solution, the filter screen is made of metal, making the entire filter screen form an anti-overflow electrode. This increases the contact area of ​​the anti-overflow electrode, avoiding the impact on the anti-overflow effect due to the small area of ​​the anti-overflow electrode at the water outlet, and improving the reliability of the anti-overflow function. The anti-overflow electrode is integrally formed with the filter screen, and the anti-overflow electrode is installed and fixed with the filter screen, making assembly more convenient. After integral forming, the filter screen can also be used as an anti-overflow electrode, increasing the area of ​​contact between the anti-overflow electrode and foam, and improving the reliability of the anti-overflow function. Furthermore, after the filter screen and the anti-overflow electrode are integrally formed, the electrical connection between the filter screen and the anti-overflow electrode is more stable and reliable.

[0023] Furthermore, the first conductive element is embedded in the handle, and the first conductive element includes a fixing part located on the outside of the pot body and a contact part extending downward along the inner side of the pot body beyond the mouth of the pot body.

[0024] By adopting the aforementioned technical solution, the first conductive element is embedded in the handle, and the first conductive element is configured as a fixing part and a contact part, which can form a skeleton structure at the top of the handle, thereby improving the structural strength and service life of the top of the handle. The fixing part is fixed to the outside of the pot body, which improves the stability of the first conductive element. The contact part is on the inside of the pot body and extends downward, which can form a structure that hooks onto the mouth of the pot body, improving the stability of the fixed connection between the handle and the pot body, and also making it easier to maintain the stability of the electrical conduction between the second conductive element and the first conductive element.

[0025] Furthermore, the top of the handle is provided with an insulator covering the first conductive element. The insulator has a guide notch that exposes the contact portion and guides the second conductive element to slide. The top of the guide notch is open, and the lower edge of the guide notch is higher than the lower edge of the anti-overflow electrode.

[0026] Using the aforementioned technical solution, an insulator covering the first conductive element is provided at the top of the handle to prevent users from being accidentally electrocuted while using the liquid heater. A guide notch is provided on the insulator, which exposes the contact part and guides the second conductive element to slide, so that the second conductive element can contact the first conductive element and conduct electricity after the lid is placed on the kettle. The lower edge of the guide notch is set higher than the lower edge of the anti-overflow electrode, so that the foam contacts the anti-overflow electrode first during the upward process to control the heating power or heating on / off, thereby improving the sensitivity of the anti-overflow signal generation. Attached Figure Description

[0027] The present invention will be further described below with reference to the accompanying drawings:

[0028] Figure 1 This is a schematic diagram of a liquid heater according to the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of the kettle lid in this utility model;

[0030] Figure 3This is an exploded view of the lid and body of the kettle in this utility model;

[0031] Figure 4 This is a schematic diagram showing the installation of the first conductive element, the second conductive element, and the elastic element in this utility model;

[0032] Figure 5 This is a schematic diagram of the pressure plate in this utility model;

[0033] Figure 6 This utility model Figure 3 Enlarged view of point A in the middle. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0035] The terms "first," "second," etc. (if present) in the specification and claims of this utility model are used to distinguish similar objects, not to describe a specific order or sequence. Even if "second" is used before a technical feature for distinction, it does not necessarily imply the presence of "first." It should be understood that in this utility model, "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. It should be understood that in this utility model, "multiple" refers to two or more. "And / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, X and / or Y can represent: X alone, X and Y simultaneously, and Y alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "Containing X, Y, and Z," "Containing X, Y, and Z" means that all three X, Y, and Z are included; "Containing X, Y, or Z" means that one of X, Y, and Z is included; "Containing X, Y, and / or Z" means that any one, two, or three of X, Y, and Z are included.

[0036] The technical solution of this utility model will be described in detail below with specific embodiments. The following specific embodiments can be selected to be combined or substituted with each other according to the actual situation, and the same or similar concepts or processes may not be described again in some embodiments.

[0037] like Figure 1 As shown, this utility model provides a liquid heater, including a kettle body, which includes a kettle body 1 and a kettle lid 2. The kettle body 1 is provided with a spout 11, and the kettle lid 2 is detachably fitted onto the kettle body 1. The outer side wall of the kettle body 1 is provided with a handle 3, as shown. Figure 2As shown, the lid 2 is equipped with an anti-overflow electrode 4 and a second conductive element 5. The second conductive element 5 and the anti-overflow electrode 4 are located on opposite sides of the lid 2. The lid 2 includes an upper cover 21 and a bottom cover 22. The bottom cover 22 includes a third conductive element 221 exposed towards the inner cavity of the pot body 1. Specifically, the lower side of the third conductive element 221 covers the opening at the upper end of the pot body 1, directly contacting the steam or foam generated by the heated liquid inside the pot body 1. One end of the second conductive element 5 is electrically connected to the third conductive element 221 through an elastic element 6. The second conductive element 5 is also electrically connected to the anti-overflow electrode 4. Figure 3 As shown, the top of the handle 3 is provided with a first conductive element 7, such as... Figure 4 As shown, the second conductive element 5, after the lid 2 is closed on the body 1, abuts against the first conductive element 7 to form an anti-overflow circuit. When the liquid heater heats the liquid and produces foam, the foam will quickly rise to the mouth of the body 1 and the spout 11 until it overflows. When the foam rises, it comes into contact with the anti-overflow electrode 4, so that the foam and the anti-overflow electrode 4 form a conductive circuit, thereby allowing the liquid heater to receive a signal to control the power of the heater to be reduced or to stop heating directly, slowing down the speed of foam production or stopping foam production. After the heating power is reduced or heating is stopped, the generated foam will fall back down, thereby preventing the generated foam from overflowing from the spout 11 and the mouth of the body 1. The elastic element 6 electrically connects the second conductive element 5 and the third conductive element 221. When the upper cover 21 and the bottom cover 22 deform due to production or assembly errors or during use, the elastic element 6 can maintain contact with the second conductive element 5 and the third conductive element 221 to a certain extent, avoiding the possibility of unstable connection and thus improving the stability of the anti-overflow function. The third conductive element 221 is exposed to the inner cavity of the pot body 1. When the foam generated during liquid heating comes into contact with the third conductive element 221, an anti-overflow signal is also generated, thereby improving the anti-overflow effect and the stability of the anti-overflow function. In addition, the setting of the third conductive element 221 and the elastic element 6 improves the long-term stability of the electrical conduction between the second conductive element 5 and the third conductive element 221, thereby improving the accuracy of the anti-overflow signal transmission. After detecting the anti-overflow signal, the heating element of the liquid heater will immediately stop heating or reduce the power, thus ensuring the anti-overflow effect.

[0038] In this embodiment, as Figure 4 As shown, the second conductive element 5 can be an elastic pin or a metal rod with a certain elastic deformation, so that the second conductive element 5 and the first conductive element 7 can deform to a certain extent with the contact between the lid 2 and the body 1, thus preventing the second conductive element 5 from being worn during the contact process and affecting the electrical conduction between the first conductive element 7 and the second conductive element 5. Figure 4As shown, the bottom cover 22 is a metal cover, and the bottom cover 22 as a whole forms the third conductive element 221. The elastic element 6 is a metal spring 61, which is installed longitudinally. The bottom cover 22 is connected to the upper cover 21 so that when the metal spring 61 is compressed, its bottom end abuts against the third conductive element 221 and its top end abuts against the second conductive element 5. The compressed metal spring 61 electrically conducts electricity between the second conductive element 5 and the third conductive element 221, improving the stability of the electrical connection between the second conductive element 5 and the third conductive element 221. By making the bottom cover 22 a metal cover, when the foam generated during heating rises to the upper side of the bottom cover 22, both the third conductive element 221 and the anti-overflow electrode generate an anti-overflow signal, improving the sensitivity and accuracy of the anti-overflow signal. The bottom cover 22 is a metal cover, generally made of food-grade materials, such as stainless steel, which can directly contact food. This solves the problem of complicated installation of the lid 2 due to the need for a waterproof structure when connecting the first and second components with wires, thus reducing the difficulty of commercializing the liquid heater product. It also reduces the waterproof requirements of the lid 2, thereby reducing the installation difficulty and the difficulty of commercializing the liquid heater product. The range of foam generation is relatively random, while the bottom cover 22 is a metal cover with a large coverage area. As long as foam rises and touches the bottom cover 22, it can generate an anti-overflow signal, thereby improving the reliability of the anti-overflow function. In another embodiment, the bottom cover 22 can also be integrally molded from a metal plate and plastic. In this case, the metal plate can be used as a third conductive element 221, and the plastic is made of a food-grade material that is resistant to high temperatures and acids and alkalis.

[0039] The metal spring 61 is tapered, with the outer diameter of the top end being smaller than that of the bottom end. The second conductive element 5 is connected to the top end of the metal spring 61. The tapered shape improves the stability of the metal spring 61 and prevents the metal spring 61 from tipping over and detaching from the second conductive element 5 or the third conductive element 221 during the process of the second conductive element 5 contacting the first conductive element 7. This improves the stability of the electrical conduction between the second conductive element 5 and the third conductive element 221.

[0040] To facilitate the removal of the lid 2 from the body 1, such as Figure 2 and Figure 4As shown, the lid 2 has a downwardly extending ring 211. As the lid 2 closes the mouth of the body 1, the ring 211 is inserted into the mouth of the body 1 and engages with the inner wall of the body 1. After the ring 211 is set, the second conductive element 5 passes through the ring 211, and the elastic element 6 acts on the rear end of the second conductive element 5, so that the second conductive element 5 elastically abuts against the first conductive element 7. Specifically, the elastic element 6 abuts against the second conductive element 5 on the front side, so that the second conductive element 5 maintains the tendency to extend forward. During the process of the lid 2 closing the body 1, the second conductive element 5 abuts against the first conductive element 7, so that the second conductive element 5 has the tendency to slide towards the rear end, and the contact between the second conductive element 5 and the first conductive element 7 is maintained during the sliding process, thereby improving the stability of the electrical conduction between the second conductive element 5 and the first conductive element 7. In this embodiment, the ring 211 has a thin-walled structure, which has limited stabilizing effect on the second conductive element 5. Therefore, the front end of the second conductive element 5 will maintain contact and friction with the first conductive element 7 during long-term use, inevitably causing the second conductive element 5 to swing up and down. However, by using the elastic element 6 to provide elastic support for the rear end of the second conductive element 5, the swinging of the second conductive element 5 during the closing of the lid 2 can be eliminated, allowing the second conductive element 5 to maintain a relatively stable state over a long period of time, and ensuring the stability of the electrical conduction between the first conductive element 7 and the second conductive element 5.

[0041] To improve the stability of the connection between the elastic element 6 and the second conductive element 5, such as Figure 4 As shown, the lid 2 is provided with an axially limiting second conductive element 5 to prevent the second conductive element 5 from disengaging from the pressure plate 8 of the ring body 211; specifically, as shown... Figure 5 As shown, the pressure plate 8 includes an elastic arm 81 connected to the elastic member 6 and a spring piece 82 that elastically presses against the rear end of the second conductive member 5. The elastic arm 81 is inserted into the top of the elastic member 6, increasing the contact range between the elastic member 6 and the pressure plate 8, thereby improving the stability of the connection between the elastic member 6 and the pressure plate 8. Two spring pieces 82 are distributed laterally, located on both sides of the rear end of the second conductive member 5 to laterally limit the rear end of the second conductive member 5. The limiting effect of the two spring pieces 82 on the rear end of the second conductive member 5 improves the stability of the connection between the second conductive member 5 and the pressure plate 8. The two spring pieces 82 also limit the second conductive member 5 circumferentially, preventing the second conductive member 5 from swinging laterally and affecting the stability of electrical conduction with the third conductive member 221; thus improving the stability of the contact and electrical connection between the second conductive member 5 and the first conductive member 7. Furthermore, the spring piece 82 abuts against the second conductive member 5, allowing the second conductive member 5 to elastically contact the first conductive member 7.

[0042] In another embodiment, such as Figure 2 and Figure 3As shown, the lid 2 is provided with a filter screen that extends downward and blocks the spout 11. The anti-overflow electrode 4 is provided on the filter screen to prevent residue in the liquid from flowing out of the spout 11 when the liquid is poured. By placing the anti-overflow electrode 4 on the filter screen, the number of parts is reduced, the installation complexity is reduced, and foam is prevented from flowing out of the spout 11, thereby improving the anti-overflow effect of the liquid heater. Furthermore, upon detecting an overflow signal, the heating element of the liquid heater will immediately stop heating or reduce its heating power. Especially when heating with a high heating power, because the heating element still has a high residual temperature after stopping heating, the foam cannot stop producing immediately. That is, the foam will still rise to a certain height before falling back down. Often, during this process, the foam may have already overflowed from the spout 11 into the kettle body 1. In other words, there is a certain lag between the descent of the foam and the cessation of heating by the heating element. By placing the overflow electrode 4 on the filter screen, which covers the spout 11, the filter screen can also play a physical role in preventing overflow due to the delay in the overflow prevention process, thus preventing the foam from overflowing. At the same time, when the electric liquid heater is used for normal water boiling, it can also prevent liquid from splashing out of the spout 11. It achieves multiple functions with a simple structure, and performs different functions at different stages and under different overflow prevention conditions.

[0043] In this embodiment, the filter screen is a metal filter screen and the filter screen as a whole forms the anti-overflow electrode 4, which increases the contact area of ​​the anti-overflow electrode 4 and avoids affecting the anti-overflow effect due to the small range of the anti-overflow electrode 4 at the water outlet 11, thereby improving the reliability of the anti-overflow function. In another embodiment, the anti-overflow electrode 4 can also be integrally formed with the filter screen, and the anti-overflow electrode 4 can be installed and fixed with the filter screen, making assembly more convenient. After integral forming, the filter screen can also be used as the anti-overflow electrode 4, increasing the range of contact between the anti-overflow electrode 4 and the foam, thereby improving the reliability of the anti-overflow function. Moreover, after the filter screen and the anti-overflow electrode 4 are integrally formed, the electrical connection between the filter screen and the anti-overflow electrode 4 is more stable and reliable.

[0044] When installing the first conductive element 7 on the handle 3, such as Figure 4As shown, the first conductive element 7 is embedded in the handle 3. Specifically, the handle 3 has two parts: a gripping part 31 located on the outside of the kettle body 1 and a mounting part 32 located at the mouth of the kettle body 1 and in contact with the inner wall of the kettle body 1. The mounting part 32 allows the handle 3 to be fixedly mounted on the outside of the kettle body 1. The gripping part 31 is designed to make it convenient for the user to hold the kettle while preventing the user from being scalded when pouring liquid from the kettle body 1. The first conductive element 7 includes a fixing part 71 located on the outside of the kettle body 1 and a contact part 72 extending downward along the inner side of the kettle body 1 beyond the mouth. The first conductive element 7 is configured as a fixing part 71 and a contact part 72, which can form a skeleton structure at the top of the handle 3, improving the structural strength and service life of the top of the handle 3. The fixing part 71 is installed inside the grip part 31 and located on the outside of the body 1, improving the stability of the first conductive element 7. The contact part 72 is installed inside the mounting part 32 and extends downward, forming a structure that hooks onto the mouth of the body 1, improving the stability of the fixed connection between the handle 3 and the body 1, and also facilitating the stability of the electrical conduction between the second conductive element 5 and the first conductive element 7.

[0045] In this embodiment, as Figure 6 As shown, the top of the handle 3 is provided with an insulator 33 covering the first conductive element 7; specifically, the insulator 33 is located at the top of the mounting part 32, and the insulator 33 is provided with a guide notch 331 that exposes the contact part 72 and guides the second conductive element 5 to slide. The top of the guide notch 331 is open, so that the second conductive element 5 can extend into the guide notch 331 and abut against the contact part 72 to realize the electrical conduction between the second conductive element 5 and the first conductive element 7; the lower edge of the guide notch 331 is higher than the lower edge of the anti-overflow electrode 4, so that the foam contacts the anti-overflow electrode 4 first during the upward process to control the heating power or heating on / off, thereby improving the sensitivity of the anti-overflow signal generation.

[0046] In addition to the preferred embodiments described above, there are other embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection claimed by this utility model.

Claims

1. A liquid heater, comprising a kettle body, the kettle body including a body and a lid, the body having a spout, the lid being detachably fitted onto the body, and a handle being provided on the outer side wall of the body, characterized in that, The lid is equipped with an anti-overflow electrode and a second conductive element. The second conductive element and the anti-overflow electrode are located on opposite sides of the lid. The lid includes an upper cover and a bottom cover. The bottom cover includes a third conductive element exposed towards the inner cavity of the pot. One end of the second conductive element is in contact with the third conductive element through an elastic element and is electrically connected. The third conductive element is in contact with the anti-overflow electrode and is electrically connected. The top of the handle is equipped with a first conductive element. After the lid is closed on the pot, the second conductive element abuts against the first conductive element and is electrically connected to form an anti-overflow signal circuit.

2. The liquid heater according to claim 1, characterized in that, The bottom cover is a metal cover that forms the third conductive element as a whole. The elastic element is a metal spring installed longitudinally. The bottom cover is connected to the upper cover so that when the elastic element is compressed, the bottom end abuts against the bottom cover and the top end abuts against the second conductive element to maintain electrical conductivity.

3. The liquid heater according to claim 1, characterized in that, The lid has a downwardly extending ring that fits into the mouth of the pot body. A second conductive element is disposed through the ring, and an elastic element acts on the rear end of the second conductive element to make the second conductive element elastically abut against the first conductive element.

4. The liquid heater according to claim 3, characterized in that, The lid is provided with an axially limiting second conductive element to prevent the second conductive element from detaching from the pressure plate of the ring body.

5. The liquid heater according to claim 4, characterized in that, The pressure plate includes an elastic arm connected to an elastic element and a spring sheet that elastically presses against the rear end of the second conductive element, with the elastic arm inserted into the top end of the elastic element.

6. The liquid heater according to claim 5, characterized in that, Two spring pieces are laterally distributed and located on both sides of the rear end of the second conductive element to laterally limit the rear end of the second conductive element.

7. The liquid heater according to claim 1, characterized in that, The kettle lid is equipped with a filter screen that extends downward and blocks the spout, and an anti-overflow electrode is located on the filter screen.

8. The liquid heater according to claim 7, characterized in that, The filter screen is a metal filter screen that forms an integral anti-overflow electrode; or, the anti-overflow electrode is integrally formed with the filter screen, and the filter screen is fixed to the bottom cover so that the anti-overflow electrode contacts the third conductive component and conducts electricity.

9. The liquid heater according to claim 1, characterized in that, The first conductive element is embedded in the handle. The first conductive element includes a fixing part located on the outside of the pot body and a contact part extending downward along the inner side of the pot body beyond the mouth of the pot body.

10. The liquid heater according to claim 9, characterized in that, The top of the handle is provided with an insulator covering the first conductive element. The insulator has a guide notch that exposes the contact portion and guides the second conductive element to slide. The top of the guide notch is open, and the lower edge of the guide notch is higher than the lower edge of the anti-overflow electrode.

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