A liquid heater

Abstract

The utility model discloses a liquid heater belongs to the field of life electric appliances, solves the structure interference problem of temperature sensing assembly and water level detection device when compact installation, and the technical scheme of solving this problem is mainly that detection assembly includes mounting support, conducting part and circuit board, and circuit board has integrated thermistor and water level induction capacitor sheet, and thermistor projects relative to water level induction capacitor sheet, and conducting part is fixed on the outside of mounting support, and conducting part includes body and the detection water response foot that is bent through mounting support, and detection water response foot projects relative to the back of body, and thermistor and detection water response foot are misaligned arrangement, and thermistor is close to the body of conducting part, and water level induction capacitor sheet is close to detection water response foot. The utility model is mainly used for ensuring that temperature sensing assembly and water level detection device can be reliably fixed and do not interfere with each other.

Description

Technical Field

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

[0002] Existing liquid heaters typically consist of two parts: a vessel body and a base. The vessel body is usually made entirely of glass, while the base contains a heating module and a control module. The heating module generally uses a heating plate structure to provide heat; the control module mainly consists of a circuit board and temperature and water level detection components. In traditional designs, the temperature detection components and water level detection devices are usually located at different positions on the side wall of the base to maintain contact with the outer wall of the glass vessel for detection. This separate layout results in a large overall size and loose structure for the detection modules, which is not conducive to the miniaturization and integration of the equipment.

[0003] To address this issue, existing technologies have employed a scheme that overlaps the temperature detection component and the water level detection device. For example, prior art publication CN222533126U discloses a compact detection module, specifically including a mounting cover on which a temperature sensing component and a water level detection device are mounted. The temperature sensing component includes a heat-conducting top cover and a temperature sensor. The heat-conducting top cover is mounted on the front side of the mounting cover, and the water level detection device is mounted on the rear side of the mounting cover. The heat-conducting top cover is mounted in front of the water level detection device, and its projection in the front-to-back direction overlaps with that of the water level detection device. This prior art reduces the overall volume of the detection module by mounting the heat-conducting top cover in front of the water level detection device, thus overlapping their projections in the front-to-back direction. However, this overlapping arrangement has significant drawbacks: firstly, the temperature sensor in the temperature detection component lacks a reliable mounting and fixing structure, making it prone to physical interference with the water level detection device; secondly, the temperature sensor may be damaged by improper compression in the overlapping arrangement, affecting detection accuracy and service life. Furthermore, the existing design lacks optimization of the positional relationship between the temperature detection component and the water level detection device, making it difficult to simultaneously ensure good temperature conduction and water level detection sensitivity.

[0004] To address the aforementioned issues, existing technologies urgently need improvement. Utility Model Content

[0005] The purpose of this invention is to provide a liquid heater that solves the structural interference problem between the temperature sensing component and the water level detection device when they are installed in a compact manner, ensuring that the two are reliably fixed and do not interfere with each other.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a liquid heater, including a pot body and a base, wherein the base is provided with a detection component for detecting water level and water temperature, the detection component including a mounting bracket, a conductive element and a circuit board, the circuit board integrating a thermistor and a water level sensing capacitor, the thermistor protruding relative to the water level sensing capacitor, the conductive element being fixed to the outside of the mounting bracket, the conductive element including a body and a water level sensing foot that bends through the mounting bracket, the water level sensing foot protruding relative to the back of the body, the thermistor and the water level sensing foot being misaligned, and the thermistor being in close contact with the body of the conductive element and the water level sensing capacitor being in close contact with the water level sensing foot.

[0007] After adopting the above technical solution, this utility model has the following advantages: Miniaturization and reliability of the detection component are achieved through integrated layout and staggered structure design. The circuit board integrates a thermistor and a water level sensing capacitor. The thermistor protrudes to directly contact the conductive component body, achieving temperature conduction; the water level sensing capacitor contacts through the water level sensing foot, and the staggered arrangement of the two avoids spatial interference. The conductive component body and the water level sensing foot use a bent structure to pass through the mounting bracket, ensuring both fixing strength and forming contact pressure with the water level sensing capacitor through the protrusion on the back of the water level sensing foot. The mounting bracket, as a supporting carrier, constrains the spatial position of the conductive component and the circuit board so that the thermistor is close to the body and the water level sensing capacitor is close to the water level sensing foot, forming a layered detection structure. The thermistor's close contact with the body improves the temperature measurement response speed, while the water level sensing capacitor's close contact with the water level sensing foot enhances the water level signal sensitivity; the staggered layout eliminates the risk of compression between components.

[0008] Furthermore, the mounting bracket has a through-hole section, the body of the conductive component covers the through-hole section, and the thermistor extends into the through-hole section and is in close contact with the body of the conductive component.

[0009] The aforementioned technical solution addresses the problem of temperature sensor being damaged by compression due to physical interference between the sensor and the water level detection device during installation. By incorporating a through-hole in the mounting bracket, an independent spatial channel is provided for the thermistor, allowing it to pass directly through the bracket structure without contacting the water level detection components. The design of the conductive element covering the through-hole ensures both the positioning and support of the thermistor and creates an interference-preventing protective structure through the physical isolation of the through-hole. The thermistor's insertion into the through-hole, close to the conductive element, achieves direct physical contact between them. This ensures temperature detection sensitivity and, through the spatial constraint of the through-hole, limits the thermistor's installation path, fundamentally preventing contact with the water level sensing capacitor. This combination of the through-hole and the covering structure achieves a compact layout of the detection components while effectively solving the problem of physical interference between detection elements through both spatial isolation and path limitation.

[0010] Furthermore, the edge of the conductive element body is provided with a fixing clip, and the mounting bracket is provided with a first insertion hole for the water detection sensor foot to pass through and a second insertion hole for the fixing clip to pass through. The fixing clip passes through the second insertion hole and bends to fix the conductive element body to the mounting bracket.

[0011] The aforementioned technical solution solves the problem of physical interference between the conductive component and the water level detection device caused by insecure installation. By setting a fixing clip on the edge of the main body and opening a first and second insertion hole on the mounting bracket, mechanical fixation between the conductive component and the mounting bracket is achieved. The fixing clip bends after passing through the second insertion hole, utilizing the elastic deformation characteristics of the metal material to form a locking structure. Assembly can be completed without additional fasteners, avoiding the structural complexity and reliability risks associated with screw or glue fixation. The first and second insertion holes are located at different positions on the mounting bracket, making the installation paths of the water detection sensor and the fixing clip independent. This ensures the free insertion of the water detection sensor while the bending and locking action of the fixing clip firmly positions the main body, effectively preventing displacement or loosening of the conductive component during long-term use. This split insertion hole design also avoids spatial interference between the water detection sensor and the fixing clip during installation, ensuring that both maintain their functional independence within a compact layout.

[0012] Furthermore, the mounting bracket has a positioning groove on its front side, and the conductive element has a raised ring around its edge, which engages with the positioning groove.

[0013] The aforementioned technical solution addresses the problem of physical interference between detection components caused by inaccurate positioning of the conductive component on the mounting bracket. Precise positioning of the conductive component on the bracket is achieved through the interaction of a positioning groove on the front of the mounting bracket and a raised ring on the edge of the conductive component body. The positioning groove provides physical restraint space for the raised ring, preventing the conductive component body from shifting or rotating during installation, ensuring that the relative positional relationship between the water-sensing sensor foot and the water level sensing capacitor meets design requirements. The structure design of the raised ring surrounding the edge of the body increases the contact area between the conductive component and the mounting bracket, and the interlocking groove and raised ring form a mechanical lock, preventing the conductive component from loosening due to external vibration or assembly errors. This positioning method effectively prevents misalignment between the conductive component and the thermistor and water level sensing capacitor on the circuit board, thereby avoiding damage to the detection components due to physical interference.

[0014] Furthermore, the first and second insertion holes are located in the positioning groove, and the water detection sensor foot and the fixing clip are located on the protruding ring.

[0015] The aforementioned technical solution addresses the problem of interference in the detection component structure caused by inaccurate positioning of the conductive element and mounting bracket, leading to misalignment of the water detection sensor and fixing clip. By placing the first and second sockets inside the positioning groove, the installation positions of the water detection sensor and fixing clip are confined to a specific area within the positioning groove. The geometric boundary of the positioning groove forms a physical constraint, ensuring the assembly positional accuracy between the water detection sensor and the first socket, and between the fixing clip and the second socket. Simultaneously, placing the water detection sensor and fixing clip on the convex ring allows the three-dimensional structure of the convex ring to form a three-dimensional mating relationship with the positioning groove. This not only achieves planar positioning constraints but also creates vertical limiting through the contact between the sidewall of the convex ring and the sidewall of the positioning groove. This automatically corrects the relative positional deviation between the conductive element and the mounting bracket during assembly, avoiding the risk of physical interference caused by spatial misalignment between the water detection sensor and the thermistor.

[0016] Furthermore, thermally conductive silicone grease is applied between the thermistor and the body of the conductive element.

[0017] The aforementioned technical solution addresses the problem of low thermal conductivity and reduced temperature detection accuracy caused by poor contact between the thermistor and the conductive component. By applying thermally conductive silicone grease between the thermistor and the conductive component, the microscopic gaps at their contact surfaces are effectively filled, forming a continuous thermally conductive medium layer. This design leverages the high thermal conductivity and interface wetting properties of the thermally conductive silicone grease to significantly improve the heat transfer efficiency between the thermistor and the metal conductive component, ensuring that temperature changes in the kettle body are quickly and completely transferred to the thermistor. Simultaneously, the flexible filling properties of the thermally conductive silicone grease compensate for unevenness at the contact surfaces, avoiding localized poor contact caused by mechanical assembly errors. This ensures both the real-time performance and accuracy of temperature detection while reducing the impact of contact thermal resistance on detection accuracy. This non-structural improvement method, while maintaining the original compact layout, solves the heat transfer efficiency bottleneck problem inherent in traditional rigid contact methods through material property optimization.

[0018] Furthermore, the mounting bracket includes a front bracket and a rear bracket, the front bracket is movably connected to the rear bracket and slides back and forth relative to the rear bracket, the rear bracket is fixed to the base, and an elastic element is provided between the front bracket and the rear bracket to keep the conductive element in close contact with the kettle body; or, the mounting bracket includes a front bracket, a middle bracket and a rear bracket, the front bracket and the middle bracket are connected to form a mounting cavity for accommodating the circuit board, the front bracket is slidably connected to the rear bracket, the rear bracket is fixed to the base, and an elastic element is provided between the middle bracket and the rear bracket to keep the conductive element in close contact with the kettle body.

[0019] The aforementioned technical solution addresses the problem in existing liquid heaters where the mounting bracket for the detection component cannot effectively adhere to the kettle body, leading to detection errors or component damage. Two different bracket combinations achieve dynamic contact between the detection component and the kettle body. In the first structure, the sliding connection between the front and rear brackets, coupled with an elastic element, provides the mounting bracket with displacement compensation capabilities in the front-to-back direction. When the kettle body is placed, the elastic element pushes the front bracket tightly against the outer wall of the kettle, preventing poor contact of the conductive components due to kettle body positional deviations. The second structure adds a middle bracket to form an independent mounting cavity, separating the circuit board from the sliding mechanism. The elastic element between the middle and rear brackets maintains the conductive components' fit against the kettle body while preventing the circuit board from being affected by mechanical movement. Both solutions utilize the elastic element to provide continuous pressure, adapting to different kettle body sizes or assembly tolerances, ensuring stable contact between the thermistor and water level sensing capacitor and the conductive components, thereby improving detection accuracy and preventing component damage due to compression.

[0020] Furthermore, the kettle body is an all-glass kettle body, the base is equipped with a heating plate, the kettle body is placed on the heating plate, and the body of the conductive component is in close contact with the outer wall of the kettle body.

[0021] The aforementioned technical solution addresses the issue of reliable contact between the conductive component and the pot body in an all-glass pot structure, avoiding physical interference and ensuring testing accuracy and component safety. By limiting the pot body to an all-glass material, the conductive component can be directly attached to the glass surface for testing, avoiding uneven heat transfer or installation gaps caused by the multi-layered structure of composite material pots. A heating base provides a stable foundation for the pot body, and the placement of the pot body on the heating base ensures a fixed relative position between the pot body and the base, preventing the conductive component from shifting due to pot body movement. The conductive component is pressed tightly against the outer wall of the pot body, directly improving temperature detection accuracy through physical contact and eliminating detection errors caused by gaps between the conductive component and the pot body. This technical solution, through the synergistic effect of material selection, layout constraints, and contact relationships, avoids the space occupation of traditional split-type testing components while ensuring testing accuracy.

[0022] Furthermore, the kettle body includes a glass kettle body and a heating base. The outer bottom surface of the heating base is provided with an upper connector, and the base is provided with a lower connector. The kettle body is placed on the base, and the upper connector and the lower connector are plugged in and electrically coupled. The body of the conductive component is in close contact with the outer side wall of the glass kettle body.

[0023] The aforementioned technical solution addresses the problem of physical interference and sensor damage caused by unclear fixing methods when the temperature sensing component and water level detection device are overlapped. By designing the kettle body as a separate structure of glass body and heating base, the temperature detection area and heating area are separated, avoiding the impact of high temperature on detection accuracy. A connector is installed on the outer bottom surface of the heating base, forming a plug-in electrical coupling with the lower connector of the base, which not only provides power but also ensures precise positioning of the kettle body and the base. The design of the conductive component body closely adhering to the outer wall of the glass kettle body allows for direct physical conduction of the kettle body temperature, eliminating medium conduction errors compared to traditional indirect detection methods. Simultaneously, this structure enables the staggered layout of the water level sensing capacitor and thermistor, avoiding spatial interference between internal components of the detection assembly and providing physical support for the overlapping and compact layout.

[0024] Furthermore, the side of the conductive component facing the pot body is an arc surface that fits against the outer wall of the pot body.

[0025] The aforementioned technical solution addresses the issue of poor fit between the conductive component and the outer wall of the kettle body due to shape mismatch, thus avoiding detection errors or structural interference caused by poor contact. By designing the side of the conductive component facing the kettle body as an arc surface that matches the shape of the outer wall of the kettle body, the conductive component can perfectly fit the curved structure of the kettle body. This arc surface design eliminates the gaps generated by traditional planar contact methods on curved kettle bodies, ensuring maximum contact area between the conductive component and the outer wall of the kettle body. The arc surface structure not only enhances heat conduction efficiency, enabling the thermistor to accurately sense temperature changes in the kettle body, but also avoids component damage due to structural interference during installation through complementary physical shape matching. This arc surface feature ensures a stable relative positional relationship between the water level sensing capacitor and the water detection sensor pin, thereby guaranteeing the reliability of the water level detection signal. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings:

[0027] Figure 1 This is a schematic diagram of a liquid heater according to the present invention;

[0028] Figure 2 This is a cross-sectional view of the base of a liquid heater according to the present invention;

[0029] Figure 3 This is an exploded view of a detection component in a liquid heater according to the present invention.

[0030] Figure 4 This is a schematic diagram of the front of the circuit board in a liquid heater according to the present invention;

[0031] Figure 5This is a schematic diagram of a conductive element in a liquid heater according to the present invention;

[0032] Figure 6 This is a schematic diagram of the back of the mounting bracket in a liquid heater according to the present invention (showing the positions of the water detection sensor foot and the fixing clip);

[0033] Figure 7 This is a schematic diagram of the mounting bracket in a liquid heater according to the present invention;

[0034] Figure 8 This is a cross-sectional view of a detection component in a liquid heater according to the present invention. Detailed Implementation

[0035] 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.

[0036] 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.

[0037] 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.

[0038] In existing technologies, liquid heaters typically employ a split design, with the temperature sensing component and water level detection device located in different positions on the base. This layout results in a large overall size of the detection module and insufficient structural compactness. Existing technologies attempt to overlap the temperature sensing component and water level detection device to reduce space occupation, but this does not resolve the issue of physical interference between the two, posing a risk of damage to the temperature sensor due to compression, and also affecting detection accuracy and response speed. For example, in a health-preserving kettle with an all-glass body, the detection module needs to be tightly attached to the outer wall of the kettle; improper installation of the temperature sensing element and water level detection element can easily lead to poor contact or signal interference.

[0039] To address the aforementioned problems, this invention provides a liquid heater that achieves a compact layout of the sensing elements while avoiding structural interference. Analysis revealed that the functionality of the temperature sensing component and the water level detection device depends on effective contact with the kettle body, but their installation positions and fixing methods conflict. By studying the shortcomings of existing overlapping installation structures, the key lies in ensuring that the thermal element and the water level detection element operate independently and without interference within a limited space. Further consideration was given to integrating the sensing elements onto the same plane of the circuit board and creating a layered contact structure through a staggered protrusion design, thereby dispersing pressure in the vertical direction and avoiding direct compression between the elements.

[0040] Specific implementation examples Figures 1 to 8 As shown, the device includes a kettle body 100 and a base 200. The base 200 is equipped with a detection component 300 for detecting water level and water temperature. The detection component 300 includes a mounting bracket 31, a conductive element 32, and a circuit board 33. The circuit board 33 integrates a thermistor 331 and a water level sensing capacitor 332. The thermistor 331 protrudes relative to the water level sensing capacitor 332. The conductive element 32 is fixed to the outside of the mounting bracket 31. The conductive element 32 includes a body 321 and a water detection sensing foot 322 that bends through the mounting bracket 31. The water detection sensing foot 322 protrudes relative to the back of the body 321. The thermistor 331 and the water detection sensing foot 322 are misaligned, with the thermistor 331 closely attached to the body 321 of the conductive element 32 and the water level sensing capacitor 332 closely attached to the water detection sensing foot 322.

[0041] Mounting bracket 31 refers to the support structure used to fix the conductive component 32 and the circuit board 33. It can be implemented using injection-molded plastic brackets, or other suitable materials. Its surface has positioning grooves and holes to constrain the relative position of the conductive component 32 and the circuit board 33. The conductive component 32 refers to a metal part with heat and electricity conduction functions. It can be implemented using stamped copper sheets, or other suitable metal materials. The body 321 is used to transmit the temperature of the kettle body 100, and the water level sensing foot 322 is used to form a capacitive detection circuit. The circuit board 33 refers to the substrate integrating the detection circuit. It can be implemented using an FR-4 PCB board, with components on the front side soldered using surface mount technology. The thermistor 331 is a temperature-sensitive element, specifically an NTC thermistor 331. Its protruding design allows the top to directly contact the body 321 of the conductive component 32, shortening the heat conduction path. The water level sensing capacitor 332 is a capacitive detection electrode, specifically formed by a copper-plated area to create a flat plate capacitor structure. The water level is determined by detecting changes in capacitance. The water detection sensor 322 refers to the conductive part extending from the conductive element 32. Specifically, it can be implemented by bending a metal pin. Its back protrudes to form a contact pressure with the water level sensing capacitor 332, thereby transmitting an electrical signal.

[0042] Specifically, the thermistor 331 and the water level sensing capacitor 332 are arranged side-by-side on the circuit board 33, offset by a certain distance in the height direction. In the direction perpendicular to the circuit board 33, the protrusion of the thermistor 331 causes its top to extend beyond the mounting plane of the water level sensing capacitor 332, directly abutting against the inner surface of the body 321 of the conductive element 32. The water detection sensing foot 322 of the conductive element 32 bends backward after passing through the mounting bracket 31, forming a perpendicular contact surface with the water level sensing capacitor 332. The mounting bracket 31 fixes the conductive element 32 to the outside through a socket and positioning structure, while also constraining the bending angle of the water level sensing foot 322, ensuring stable contact between the water level sensing capacitor 332 and the water detection sensing foot 322. When the kettle body 100 is placed on the base 200, the body 321 of the conductive component 32 is in close contact with the outer wall of the kettle body 100. The thermistor 331 conducts temperature changes rapidly through the body 321, while the capacitive detection circuit composed of the water detection sensor foot 322 and the water level sensing capacitor 332 maintains a stable electrical signal through contact pressure.

[0043] Compared with existing technologies, this application achieves miniaturization and reliability of the detection component 300 through integrated layout and staggered structure design. The circuit board 33 integrates a thermistor 331 and a water level sensing capacitor 332. The thermistor 331 protrudes, allowing it to directly contact the body 321 of the conductive element 32 for temperature conduction. The water level sensing capacitor 332 contacts the conductive element through a water level sensing foot 322; the staggered arrangement of the two avoids spatial interference. The body 321 of the conductive element 32 and the water level sensing foot 322 are bent through the mounting bracket 31, ensuring both fixation strength and contact pressure between the protruding back of the water level sensing foot 322 and the water level sensing capacitor 332. The mounting bracket 31 serves as a support carrier, constraining the spatial position of the conductive element 32 and the circuit board 33 such that the thermistor 331 is close to the body 321 and the water level sensing capacitor 332 is close to the water level sensing foot 322, forming a layered detection structure. The thermistor 331 is in close contact with the body 321 to improve the temperature measurement response speed, while the water level sensing capacitor 332 and the water detection sensing pin 322 are in close contact to enhance the water level signal sensitivity. The staggered layout eliminates the risk of compression between components. The staggered layout of the thermistor 331 and the water detection sensing pin 322 ensures that they work independently within a limited space, avoiding component damage caused by contact pressure. The integrated design of the body 321 and the water detection sensing pin 322 of the conductive component 32 simplifies the assembly process, while the layered contact structure decouples the functions of temperature detection and water level detection. The integrated layout of the circuit board 33 reduces the signal transmission path, improves the detection response speed and signal stability, and ultimately achieves miniaturization of the detection component 300 while ensuring detection accuracy.

[0044] In one embodiment, the mounting bracket 31 has a through-hole 310, the body 321 of the conductive element 32 covers the through-hole 310, and the thermistor 331 extends into the through-hole 310 and is tightly attached to the body 321 of the conductive element 32. This solves the problem of physical interference between the temperature sensor and the water level detection device during installation, which could lead to the temperature sensor being squeezed and damaged. By providing a through-hole 310 in the mounting bracket 31, an independent spatial channel is provided for the installation of the thermistor 331, allowing the thermistor 331 to pass directly through the structure of the mounting bracket 31 without contacting the water level detection component. The design of the body 321 of the conductive element 32 covering the through-hole 310 ensures both the positioning and support function of the conductive element 32 for the thermistor 331 and forms an anti-interference protection structure through the physical isolation characteristics of the through-hole 310. The thermistor 331 extends into the hollow portion 310 and is closely attached to the body 321 of the conductive element 32. This structure achieves direct physical contact between the thermistor 331 and the conductive element 32, ensuring the sensitivity of temperature detection. Furthermore, the spatial constraint of the hollow portion 310 limits the installation path of the thermistor 331, fundamentally avoiding potential contact with the water detection sensor foot 322. This cooperation between the hollow portion 310 and the covering structure, while achieving a compact layout of the detection component 300, effectively solves the problem of physical interference between detection elements through spatial isolation and path limitation. The through-hole portion 310 refers to the opening area formed on the mounting bracket 31 that runs through the front and back directions. It can be achieved using stamping or injection molding processes, providing independent installation space for the thermistor 331. The body 321 of the conductive element 32 covering the hollow portion 310 means that the body 321 closes the front opening of the hollow portion 310 in a planar covering manner. This can be achieved by stamping a metal sheet. This design forms a heat conduction interface while maintaining structural integrity. The thermistor 331 extending into the hollow portion 310 means that the detection end of the thermistor 331 is inserted into the space along the axial direction of the hollow portion 310. This can be achieved by vertically mounting a surface-mount thermistor 331 on the circuit board 33. This mounting method ensures that the thermistor 331 forms direct contact with the body 321. The size of the cutout portion 310 can be referenced to the size of the thermistor 331, and is designed to fit the insertion of the thermistor 331. This creates a dedicated mounting channel for the thermistor 331. By designing the cutout portion 310 with a smaller area, the geometric constraint characteristics of the cutout portion 310 physically block the possibility of the thermistor 331 contacting the water level detection element, fundamentally eliminating the risk of physical interference between the elements. This also improves the structural strength of the mounting bracket 31. In another embodiment, the area of ​​the cutout portion 310 can be designed to be larger, and the water detection sensing foot 322 is also projected within the area of ​​the cutout portion 310. The water detection sensing foot 322 can form a cantilever structure, and the elasticity of the cantilever structure is used to ensure good contact pressure between the water detection sensing foot 322 and the water level sensing capacitor 332.

[0045] Through the above technical solution, this application effectively prevents the thermistor 331 from contacting and squeezing with the water level detection element during installation or use, ensuring the operational reliability of the temperature detection element in a compact layout. This structural design maintains the overall compact size of the detection assembly 300 while ensuring the independent operation of each detection element through spatial isolation, thus solving the problem of damage to detection elements caused by physical interference in the prior art.

[0046] In one embodiment, the edge of the body 321 of the conductive element 32 is provided with a fixing tab 323, and the mounting bracket 31 is provided with a first insertion hole 311 for the water detection sensor foot 322 to pass through and a second insertion hole 312 for the fixing tab 323 to pass through. The fixing tab 323 passes through the second insertion hole 312 and bends to fix the body 321 of the conductive element 32 to the mounting bracket 31. The fixing tab 323 refers to a sheet-like metal structure extending from the edge of the body 321 of the conductive element 32. Specifically, it can be integrally processed with the body 321 using a stamping process. After bending, it forms a mechanical locking structure, utilizing the elastic deformation of the material to generate a fixing force. The first insertion hole 311 is a through hole on the mounting bracket 31 used to guide the water detection sensor foot 322 through, and its diameter is slightly larger than the cross-section of the water detection sensor foot 322, allowing the sensor foot to be inserted without interference. The second insertion hole 312 is a positioning hole on the mounting bracket 31 used to accommodate the fixing clip 323. Its shape matches the initial state of the fixing clip 323 when it is not bent, ensuring that the fixing clip 323 can pass through accurately during assembly. Specifically, during assembly, the water detection sensor 322 passes through the first insertion hole 311, so that the body 321 of the conductive element 32 initially fits against the surface of the mounting bracket 31. The fixing clip 323 is inserted into the second insertion hole 312, and external force is applied by a tool to bend it. The bent fixing clip 323 abuts against the back of the mounting bracket 31, forming a three-point fixing structure. Since the first insertion hole 311 and the second insertion hole 312 are spatially separated on the mounting bracket 31, the movement trajectories of the water detection sensor 322 and the fixing clip 323 do not overlap, avoiding friction or collision between metal parts during assembly. The bent fixing clip 323 generates a continuous clamping force, keeping the contact surface between the body 321 and the mounting bracket 31 tightly fitted, eliminating the risk of displacement due to vibration or temperature changes. The fixing clip 323 bends after passing through the second socket 312, forming a locking structure by utilizing the elastic deformation properties of the metal material. Assembly can be completed without additional fasteners, avoiding the structural complexity and reliability risks associated with screws or glue fixation. The first socket 311 and the second socket 312 are located at different positions on the mounting bracket 31, making the installation paths of the water detection sensor 322 and the fixing clip 323 independent. This ensures the free insertion of the water detection sensor 322 while firmly positioning the main body 321 through the bending and locking action of the fixing clip 323, effectively preventing displacement or loosening of the conductive component 32 during long-term use. This split socket design also avoids spatial interference between the water detection sensor 322 and the fixing clip 323 during installation, ensuring that both maintain their functional independence within a compact layout. Among them, the fixing clip 323 refers to the metal sheet-like structure extending from the edge of the body 321 of the conductor 32. Specifically, it can be integrally processed with the body 321 by stamping and forming process. After bending, it forms a mechanical locking structure and uses the elastic deformation of the material to generate fixing force.The first insertion hole 311 is a through hole on the mounting bracket 31 used to guide the water detection sensor foot 322 through. Its diameter is slightly larger than the cross-section of the water detection sensor foot 322, allowing the water detection sensor foot 322 to be inserted without interference. The second insertion hole 312 is a positioning hole on the mounting bracket 31 used to accommodate the fixing clip 323. Its shape matches the initial state of the fixing clip 323 when it is not bent, ensuring that the fixing clip 323 can pass through accurately during assembly. Specifically, during the assembly process, the water detection sensor foot 322 first passes through the first insertion hole 311, realizing the pre-positioning of the body 321 relative to the mounting bracket 31, so that the body 321 of the conductive element 32 initially fits against the surface of the mounting bracket 31. Subsequently, the fixing clip 323 can be quickly aligned and inserted into the second insertion hole 312. External force is applied by a tool to bend it, and the bent fixing clip 323 abuts against the back of the mounting bracket 31, forming a three-point fixing structure. Because the first socket 311 and the second socket 312 are spatially separated on the mounting bracket 31, the movement trajectories of the water detection sensor 322 and the fixing clip 323 do not overlap, avoiding friction or collision between metal parts during assembly. The bent fixing clip 323 generates a continuous clamping force, keeping the contact surfaces between the body 321 and the mounting bracket 31 tightly fitted, eliminating the risk of displacement due to vibration or temperature changes. Compared with the prior art that relies on screws or adhesive for fixing, this solution achieves reliable fixing of the conductive component 32 without the need for auxiliary fasteners through the combination design of the split socket and the fixing clip 323, while avoiding spatial interference problems that may be caused by overlapping installation. Through the above technical solution, this application solves the problem of detection signal drift caused by the unstable installation of the conductive component 32, ensures a stable connection between the conductive component 32 and the mounting bracket 31 through a mechanical locking structure, reduces assembly complexity, and improves the structural reliability of the detection module in a dynamic working environment.

[0047] To reliably position the conductive element 32, a positioning groove 313 is provided on the front side of the mounting bracket 31, and a raised ring 3211 is provided on the edge of the body 321 of the conductive element 32. The raised ring 3211 cooperates with the positioning groove 313 to solve the problem of physical interference between the detection components 300 caused by inaccurate positioning of the conductive element 32 on the mounting bracket 31. By cooperating with the positioning groove 313 on the front side of the mounting bracket 31 and the raised ring 3211 on the edge of the body 321 of the conductive element 32, the precise positioning of the conductive element 32 on the mounting bracket 31 is achieved. The positioning groove 313 provides physical limiting space for the raised ring 3211, so that the body 321 of the conductive element 32 cannot be offset or rotated during installation, ensuring that the relative positional relationship between the water detection sensing foot 322 and the water level sensing capacitor 332 meets the design requirements. The structural design of the convex ring 3211 surrounding the edge of the body 321 increases the contact area between the conductive component 32 and the mounting bracket 31. Furthermore, the convex-concave fit between the positioning groove 313 and the convex ring 3211 forms a mechanical lock, preventing the conductive component 32 from loosening due to external vibration or assembly errors. This positioning method effectively prevents misalignment between the conductive component 32 and the thermistor 331 and the water level sensing capacitor 332 on the circuit board 33, thereby preventing damage to the detection component 300 due to physical interference. The positioning groove 313 refers to a recessed structure formed on the front side of the mounting bracket 31. Specifically, it can be formed into a concave limiting area on the bracket surface using injection molding to accommodate the convex ring 3211 and limit its displacement. The depth and width of the positioning groove 313 can be adjusted according to the size of the convex ring 3211. The width of the positioning groove 313 can be 1.05-1.2 times the width of the convex ring 3211 to achieve a tight fit. The convex ring 3211 refers to a continuous protruding structure surrounding the edge of the body 321 of the conductive element 32, which can enhance the structural strength of the body 321. Specifically, it can be formed into an annular boss on the edge of the body 321 of the conductive element 32 made of metal or plastic through stamping or injection molding. The engagement of the convex ring 3211 and the positioning groove 313 forms a mechanical limit, preventing the conductive element 32 from shifting or rotating in the horizontal direction. Specifically, when the conductive element 32 is assembled to the mounting bracket 31, the convex ring 3211 is embedded in the positioning groove 313, and the sidewall of the positioning groove 313 forms a circumferential constraint on the convex ring 3211. Because the convex ring 3211 surrounds the edge of the body 321 and the positioning groove 313 has a matching contour, the conductive element 32 cannot undergo lateral displacement or angular deflection during installation. For example, during assembly, the operator only needs to align the convex ring 3211 with the positioning groove 313 and press it into place to ensure the vertical alignment of the water detection sensor foot 322 and the water level sensing capacitor sheet 332. Through the interlocking structure of the positioning groove 313 and the convex ring 3211, the conductive element 32 and the mounting bracket 31 form a surface contact rather than a point contact, and the contact area can be increased to 3-5 times that of the original structure, thereby improving assembly stability.Compared with existing technologies, existing detection modules, when using a heat-conducting top cover and an overlapping arrangement of the water level detection device, only achieve spatial compression through overlapping projections in the front-to-back direction, but lack a positioning structure, making it easy for the temperature sensor to shift during installation. This solution uses the mechanical limiting of the positioning groove 313 and the convex ring 3211 to automatically correct the position of the conductive component 32 during installation, avoiding misalignment between the water detection sensor foot 322 and the thermistor 331 due to manual assembly errors. For example, in existing technologies, the temperature sensor installation error may reach ±1 mm, while this solution can control the error within ±0.2 mm. Through the above technical solution, this application achieves precise alignment between the conductive component 32 and the mounting bracket 31, eliminating the risk of physical interference between the thermistor 331 and the water detection sensor foot 322 due to assembly deviations. The cooperation between the convex ring 3211 and the positioning groove 313 ensures that the conductive component 32 remains stable under pressure or vibration from the kettle body 100, preventing signal drift caused by component loosening after long-term use. In addition, this positioning structure simplifies the assembly process, allowing operators to complete precise installation without repeated adjustments.

[0048] The first socket 311 and the second socket 312 are located within the positioning groove 313, and the water detection sensor 322 and the fixing clip 323 are located on the protruding ring 3211. This solves the problem of misalignment of the water detection sensor 322 and the fixing clip 323 caused by inaccurate positioning of the conductive component 32 and the mounting bracket 31, which leads to structural interference of the detection component 300. By setting the first socket 311 and the second socket 312 inside the positioning groove 313, the installation positions of the water detection sensor 322 and the fixing clip 323 are limited to a specific area of ​​the positioning groove 313. The geometric boundary of the positioning groove 313 forms a physical constraint, thereby ensuring the assembly position accuracy between the water detection sensor 322 and the first socket 311, and between the fixing clip 323 and the second socket 312. Simultaneously, the water detection sensor 322 and the fixing clip 323 are positioned on the convex ring 3211, allowing the three-dimensional structure of the convex ring 3211 to form a three-dimensional mating relationship with the positioning groove 313. This not only achieves planar positioning constraints but also creates vertical limits through the contact between the sidewall of the convex ring 3211 and the sidewall of the positioning groove 313. This automatically corrects the relative positional deviation between the conductive component 32 and the mounting bracket 31 during assembly, avoiding the risk of physical interference caused by the spatial misalignment of the water detection sensor 322 and the thermistor 331. The positioning groove 313 also provides guidance when the water detection sensor 322 and the fixing clip 323 are inserted, facilitating insertion into the corresponding holes. Specifically, during assembly, the convex ring 3211 is embedded in the positioning groove 313, with its sidewall contacting the inner wall of the positioning groove 313 to form a vertical limit. Simultaneously, the planar boundary of the convex ring 3211 is constrained by the opening edge of the positioning groove 313, forming a horizontal positioning. The first socket 311 and the second socket 312 are confined within the geometric range of the positioning groove 313, ensuring that the bending path of the water-sensing pin 322 and the fixing clip 323 is spatially restricted by the positioning groove 313 when they pass through the sockets, preventing lateral displacement. When the fixing clip 323 bends after passing through the second socket 312, its bending angle is constrained by both the depth of the positioning groove 313 and the height of the convex ring 3211, ensuring that the end of the fixing clip 323 is always within the preset fixed area. After the water-sensing pin 322 passes through the first socket 311, the length of its bent portion is determined by the depth of the positioning groove 313, thereby ensuring that the contact pressure with the water level sensing capacitor 332 is within a controllable range. Compared with the prior art, the socket positions in the traditional detection component 300 lack spatial constraints, which makes it easy for the pins to deviate when bent. This solution integrates the insertion hole into the positioning groove 313, and uses the geometric boundary of the positioning groove 313 to form a double constraint on the water detection sensor foot 322 and the fixing clip 323, so that the installation position error of the water detection sensor foot 322 and the fixing clip 323 is controlled within the dimensional tolerance range of the positioning groove 313.In existing technologies, the fixation of the conductive element 32 to the bracket relies solely on planar positioning. However, this solution utilizes the three-dimensional engagement of the convex ring 3211 and the positioning groove 313 to create a mechanical limit in the vertical direction, eliminating the risk of misalignment caused by gravity or external forces during assembly. Through this technical solution, this application resolves the structural interference problem of the detection component 300 caused by positioning deviations between the conductive element 32 and the mounting bracket 31. The engagement of the convex ring 3211 and the positioning groove 313 allows the conductive element 32 to automatically correct its position during assembly, preventing spatial overlap between the water detection sensor foot 322 and the thermistor 331. The concentrated arrangement of the insertion holes within the positioning groove 313 reduces the degrees of freedom during installation, ensuring that the bending operation of the fixing clip 323 remains within a controllable range, guaranteeing the relative positional accuracy of the conductive element 32 and the circuit board 33. This achieves stable assembly of the detection component 300 within a limited space, improving the reliability of the coordinated operation of water level and temperature detection.

[0049] Thermally conductive silicone grease is applied between the thermistor 331 and the body 321 of the conductive element 32 to solve the problem of low thermal conductivity caused by poor contact between the thermistor 331 and the body 321 of the conductive element 32, which affects the accuracy of temperature detection. By applying thermally conductive silicone grease between the thermistor 331 and the body 321 of the conductive element 32, the microscopic gaps at the contact surface are effectively filled, forming a continuous thermally conductive medium layer. This design utilizes the high thermal conductivity and interface wetting properties of the thermally conductive silicone grease to significantly improve the thermal conductivity between the thermistor 331 and the metal conductive element 32, ensuring that temperature changes in the pot body 100 can be quickly and completely transferred to the thermistor 331. At the same time, the flexible filling properties of the thermally conductive silicone grease can compensate for the unevenness of the contact surface, avoiding local poor contact caused by mechanical assembly errors. This ensures both the real-time performance and accuracy of temperature detection, and reduces the impact of contact thermal resistance on detection accuracy. This non-structural improvement method solves the bottleneck problem of heat transfer efficiency in traditional rigid contact methods by optimizing material properties while maintaining the original compact layout. Thermal grease is an interface filler material with high thermal conductivity, specifically a mixture of silicon-based polymers and thermally conductive particles. Its function is to fill the microscopic gaps at the contact surface between the thermistor 331 and the body 321 of the conductive element 32, forming a continuous heat conduction path. Contact surface unevenness compensation utilizes the fluidity and plasticity of the thermal grease, specifically achieved by adjusting its viscosity and thixotropy, to eliminate localized poor contact problems caused by machining errors or assembly deviations. Specifically, after applying thermal grease to the contact interface between the thermistor 331 and the body 321 of the conductive element 32, the grease, under pressure, fills the air gaps formed by the microscopic roughness of the metal surface, transforming the original point contact heat transfer mode into a surface contact mode. The thermally conductive particles in the thermal grease form a three-dimensional heat conduction network, allowing the heat absorbed by the body 100 of the conductive element 32 to be evenly transferred to the sensitive area of ​​the thermistor 331. Meanwhile, the flexible properties of silicone grease allow the integrity of the contact interface to be maintained even when there is slight displacement between the thermistor 331 and the conductive element 32, avoiding the impact of contact pressure fluctuations caused by vibration or temperature expansion on the stability of heat conduction. Compared with the prior art, the temperature sensing component and the detection device adopt a rigid stacking method, relying on machining precision to ensure the contact surface fit, but without setting a thermally conductive medium layer, the contact thermal resistance is significantly affected by surface roughness. This application introduces thermally conductive silicone grease as an interface material, which actively eliminates the negative impact of microscopic defects on heat conduction on the contact surface without changing the original compact structural layout, and solves the technical limitation that the rigid contact method cannot adaptively compensate for assembly errors.Through the above technical solution, this application achieves efficient thermal coupling between the thermistor 331 and the body 321 of the conductive element 32, ensuring the authenticity and real-time performance of the temperature detection signal, reducing the temperature detection error caused by fluctuations in contact thermal resistance, and maintaining the structural compactness and assembly tolerance of the detection component 300.

[0050] The mounting bracket 31 can adopt various structural forms. For example, in one embodiment, the mounting bracket 31 includes a front bracket 301 and a rear bracket 302. The front bracket 301 is movably connected to the rear bracket 302 and slides back and forth relative to the rear bracket 302. The rear bracket 302 is fixed to the base 200. An elastic element 34 is provided between the front bracket 301 and the rear bracket 302 to keep the conductive element 32 in close contact with the kettle body 100. Alternatively, in another embodiment, the mounting bracket 31 includes a front bracket 301, a middle bracket 303, and a rear bracket 302. The front bracket 301 and the middle bracket 303 are connected to form a mounting cavity for accommodating the circuit board 33. The front bracket 301 is slidably connected to the rear bracket 302. The rear bracket 302 is fixed to the base 200. An elastic element 34 is provided between the middle bracket 303 and the rear bracket 302 to keep the conductive element 32 in close contact with the kettle body 100. This solves the problem that the mounting bracket 31 of the detection component 300 in the existing liquid heater cannot effectively fit the kettle body 100, resulting in detection errors or component damage. Two different bracket combination structures achieve dynamic contact between the detection component 300 and the kettle body 100. In the first structure, the sliding connection between the front bracket 301 and the rear bracket 302, coupled with the elastic element 34, enables the mounting bracket 31 to compensate for displacement in the front and rear directions. When the kettle body 100 is placed, the elastic element 34 pushes the front bracket 301 tightly against the outer wall of the kettle body 100, preventing poor contact of the conductive element 32 due to positional deviation of the kettle body 100. The second structure adds a middle bracket 303 to form an independent mounting cavity, separating the circuit board 33 from the sliding mechanism. The elastic element 34 between the middle bracket 303 and the rear bracket 302 maintains the contact of the conductive element 32 with the kettle body 100 while preventing the circuit board 33 from being affected by mechanical movement. Both schemes use the elastic element 34 to provide continuous pressure, adapting to different kettle body 100 sizes or assembly tolerances, ensuring a stable contact relationship between the thermistor 331 and the water level sensing capacitor 332 and the conductive element 32, thereby improving detection accuracy and preventing component damage due to compression. The front bracket 301 is movably connected to the rear bracket 302, meaning the front bracket 301 achieves linear displacement via a slide rail or guide groove structure. Specifically, a dovetail groove combined with a slider can be used to move the front bracket 301 along a preset direction. The elastic element 34 is a mechanical component capable of elastic deformation, specifically a compression spring or elastic rubber pad, which pushes the front bracket 301 or the middle bracket 303 towards the pot body 100 through elastic restoring force. The mounting cavity is a closed space used to encapsulate electronic components, specifically formed by the injection-molded front bracket 301 and the middle bracket 303 fastening together, used to isolate the circuit board 33 from external mechanical moving parts. Specifically, when a sliding connection structure of the front bracket 301 and the rear bracket 302 is used, the elastic element 34 is placed between the two brackets and is in a pre-compressed state. During the placement of the pot body 100, the front bracket 301 moves backward under the reaction force of the outer wall of the pot body 100, and the elastic element 34 is further compressed and generates a reverse thrust, so that the conductive element 32 always maintains contact pressure with the surface of the pot body 100.When a three-layer structure of front bracket 301, middle bracket 303, and rear bracket 302 is adopted, the circuit board 33 is fixed in the mounting cavity formed by the front bracket 301 and the middle bracket 303, preventing circuit breakage due to displacement of the circuit board 33 during sliding. The elastic element 34 between the middle bracket 303 and the rear bracket 302 continuously applies a thrust, causing the front bracket 301 to drive the conductive element 32 to adapt to the position change of the kettle body 100, while isolating the interference of mechanical movement on the circuit board 33. Compared with the prior art, the existing detection module achieves a compact structure by overlapping the temperature sensing components and the water level detection device, but it does not set a dynamic compensation mechanism, resulting in unstable contact pressure between the detection component 300 and the kettle body 100. This solution, through the combined design of sliding connection and elastic element 34, enables the conductive element 32 to automatically adjust the contact state according to the position deviation of the kettle body 100, eliminating detection errors caused by assembly tolerances or deformation of the kettle body 100, while avoiding component damage caused by rigid contact. Through the above technical solutions, this application achieves dynamic and tight contact between the detection component 300 and the outer wall of the kettle body 100, ensuring that the thermistor 331 and the water level sensing capacitor 332 always maintain effective contact with the conductive component 32, thereby improving the sensitivity of water temperature detection and the accuracy of water level detection; the elastic buffer structure effectively absorbs mechanical shocks, preventing the conductive component 32 from breaking due to vibration or collision of the kettle body 100; the independent design of the mounting cavity isolates the influence of mechanical movement on the circuit board 33, improving circuit stability. In other embodiments, the rear bracket 302 can also be implemented using the outer shell 22 of the base 200.

[0051] The kettle body 100 can also have various structural forms. For example, in one embodiment, the kettle body 100 is an all-glass kettle body 100. The base 200 is provided with a heating plate 21, and the kettle body 100 is placed on the heating plate 21. The body 321 of the conductive component 32 is in close contact with the outer wall of the kettle body 100, which solves the problem of reliable contact between the conductive component 32 and the kettle body 100 and avoids physical interference under the all-glass kettle body 100 structure, ensuring the accuracy of detection and the safety of the components. By limiting the kettle body 100 to an all-glass material, the conductive component 32 can be directly attached to the glass surface for detection, avoiding the problem of uneven heat transfer or installation gaps caused by the multi-layer structure of the composite material kettle body 100. The heating plate 21 of the base 200 provides a stable placement foundation for the kettle body 100. Combined with the layout of the kettle body 100 placed on the heating plate 21, it ensures that the relative position between the kettle body 100 and the base 200 is fixed, preventing the conductive component 32 from shifting due to the shaking of the kettle body 100. The body 321 of the conductive component 32 is tightly attached to the outer wall of the kettle body 100, directly improving the temperature detection accuracy through physical contact, while eliminating detection errors caused by gaps between the conductive component 32 and the kettle body 100. This technical solution, through the synergistic effect of material selection, layout constraints, and contact relationships, avoids the space occupation of traditional split detection components 300 while ensuring detection accuracy. The all-glass kettle body 100 refers to the kettle body 100 being entirely composed of a single glass material, specifically high borosilicate glass. By eliminating the layered structure of composite materials, uneven heat transfer or contact gaps caused by differences in the thermal expansion coefficients of different materials are avoided. The heating base 21 refers to the planar structure on the top of the base 200 used to support the kettle body 100. It can be made of metal and integrates heating elements. Complete contact between the flat surface and the bottom of the kettle body 100 ensures stable placement and uniform heating of the kettle body 100. The fact that the body 321 of the conductive element 32 is in close contact with the outer wall of the pot body 100 means that the detection surface of the conductive element 32 and the surface of the glass pot body 100 form a high degree of contact. This can be achieved through an elastic support structure or a positioning slot, eliminating the temperature conduction delay or signal attenuation caused by air gaps through direct physical contact. Specifically, the all-glass pot body 100 avoids the deformation differences caused by heating in multi-layer composite structures due to material uniformity, ensuring that the contact surface between the body 321 of the conductive element 32 and the outer wall of the pot body 100 always maintains a good degree of contact. When the pot body 100 is placed on the heating base 21, its gravity and the support force of the base are balanced, reducing the displacement of the conductive element 32 caused by shaking or tilting of the pot body 100. After the body 321 of the conductive element 32 is in close contact with the outer wall of the pot body 100, the temperature signal is directly transmitted to the conductive element 32 through the glass material without the need for an intermediate medium, thereby shortening the response time and improving the detection sensitivity. This technical solution, through the synergistic effect of material selection, support structure and contact relationship, ensures detection accuracy while avoiding mechanical interference caused by relative displacement between the transmission component 32 and the pot body 100.This solution uses a structure design where the all-glass pot body 100 is directly attached to the conductive component 32. This eliminates the need for overlapping installation of the detection component 300 and utilizes the high thermal conductivity of glass to achieve rapid temperature conduction, avoiding signal distortion. The conductive component 32 only needs to make single-point contact with the outer wall of the pot body 100 to complete the detection, which simplifies the installation structure, reduces the risk of component damage, and improves the long-term reliability of the liquid heater.

[0052] In another embodiment, the kettle body 100 includes a glass kettle body and a heating base 21. An upper connector is provided on the outer bottom surface of the heating base 21, and a lower connector is provided on the base 200. The kettle body 100 is placed on the base 200, and the upper and lower connectors are electrically coupled by plugging in. The body 321 of the conductive component 32 is in close contact with the outer wall of the glass kettle body, solving the problem of physical interference and easy damage to the temperature sensor caused by unclear fixing methods when the temperature sensing component and the water level detection device are overlapped. By designing the kettle body 100 as a separate structure of the glass kettle body and the heating base 21, the temperature detection area and the heating area are separated, avoiding the influence of high temperature on the detection accuracy. The upper connector on the outer bottom surface of the heating base 21 forms a plug-in electrical coupling with the lower connector of the base 200, realizing both power supply function and ensuring accurate positioning of the kettle body 100 and the base 200. The design of the body 321 of the conductive component 32 being in close contact with the outer wall of the glass kettle body allows for direct physical conduction of the kettle body temperature, eliminating medium conduction errors compared to traditional indirect detection methods. Meanwhile, this structure makes it possible to stagger the water level sensing capacitor 332 and the thermistor 331, avoiding spatial interference between internal components of the detection assembly 300 and providing physical support for a compact layout. The glass body refers to the transparent container portion separated from the heating base 21, which can be made of high borosilicate glass. Its split structure physically isolates the temperature detection area from the heating area. The upper connector on the outer bottom surface of the heating base 21 refers to the electrical coupling interface being located on the non-contact surface of the heating component, which can be implemented using a spring-loaded connector to form a separable conductive connection with the base 200. The body 321 of the conductive element 32 is in close contact with the outer wall of the glass body, meaning the temperature sensing component maintains surface contact with the outer wall of the container. This can be implemented using a metal spring or a flexible thermally conductive pad to directly conduct the container wall temperature signal. Specifically, the split structure of the glass body and the heating base 21 separates the temperature detection area from the heating area, preventing the high temperature of the base from interfering with the temperature detection of the glass body during heating. The plug-in design of the upper and lower connectors not only provides power but also ensures the axial positioning accuracy of the kettle body 100 and the base 200 through the guiding effect of the mechanical plug-in. The continuous contact between the body 321 of the conductive element 32 and the outer wall of the glass kettle body allows the thermistor 331 to directly obtain the surface temperature data of the kettle body 100, eliminating the temperature conduction delay caused by air gaps or dielectric layers in traditional structures.

[0053] To improve sensing efficiency and effectiveness, the side of the body 321 of the conductive element 32 facing the kettle body 100 is an arc surface that fits against the outer wall of the kettle body 100. This solves the problem of loose fit caused by shape mismatch between the conductive element 32 and the outer wall of the kettle body 100, and avoids detection errors or structural interference caused by poor contact. By designing the side of the body 321 of the conductive element 32 facing the kettle body 100 as an arc surface that matches the shape of the outer wall of the kettle body 100, the conductive element 32 can completely fit the curved structure of the kettle body 100. This arc surface design eliminates the gaps generated by traditional planar contact methods on the curved kettle body 100, ensuring that the contact area between the body 321 of the conductive element 32 and the outer wall of the kettle body 100 is maximized. The arc surface structure not only enhances heat conduction efficiency, enabling the thermistor 331 to accurately sense temperature changes in the kettle body 100, but also avoids component damage caused by structural interference during installation through complementary physical shape matching. The curved surface feature ensures a stable relative position between the water level sensing capacitor 332 and the water detection sensor 322, thereby guaranteeing the reliability of the water level detection signal. The curved surface refers to a curved structure with the same curvature as the outer wall of the kettle body 100, which can be achieved through stamping or injection molding processes, eliminating contact gaps through complementary shape matching. The outer wall of the kettle body 100 refers to the outer surface area of ​​the kettle body 100 in contact with the conductive component 32, which can be made of glass. The curved surface design can accommodate the slight deformation of the glass kettle body 100 at high temperatures, ensuring stable adhesion. Specifically, the curved surface structure covers the curved area of ​​the outer wall of the kettle body 100 through complementary shape matching, leaving no gaps between the contact surfaces. When the kettle body 100 expands due to heat, the curved surface adjusts the contact angle synchronously with the deformation of the kettle body 100, maintaining a uniform distribution of adhesion pressure. The thermistor 331 forms a continuous heat conduction path with the kettle body 100 through the curved surface, avoiding localized poor contact that could lead to temperature detection delays. The relative positions of the water level sensing capacitor 332 and the water detection sensor 322 remain constant under the support of the curved surface, reducing signal fluctuations caused by tilting or vibration of the kettle body 100. Through the above technical solution, this application solves the problem of loose fit between the conductive component 32 and the outer wall of the kettle body 100 due to shape mismatch, avoiding signal distortion caused by partial detachment, ensuring the real-time transmission of the temperature detection signal and the stability of the position of the water level sensing capacitor 332, and preventing component damage due to structural interference during installation.

[0054] 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 vessel body and a base, wherein the base is provided with a detection component for detecting water level and water temperature, characterized in that, The detection component includes a mounting bracket, a conductive element, and a circuit board. The circuit board integrates a thermistor and a water level sensing capacitor. The thermistor protrudes relative to the water level sensing capacitor. The conductive element is fixed to the outside of the mounting bracket. The conductive element includes a body and a water level sensing foot that bends through the mounting bracket. The water level sensing foot protrudes relative to the back of the body. The thermistor and the water level sensing foot are staggered, with the thermistor in close contact with the body of the conductive element and the water level sensing capacitor in close contact with the water level sensing foot.

2. The liquid heater according to claim 1, characterized in that, The mounting bracket has a through-hole section, the body of the conductive component covers the through-hole section, and the thermistor extends into the through-hole section and is in close contact with the body of the conductive component.

3. The liquid heater according to claim 1, characterized in that, The edge of the conductive element body is provided with a fixing clip, and the mounting bracket is provided with a first insertion hole for the water detection sensor foot to pass through and a second insertion hole for the fixing clip to pass through. The fixing clip passes through the second insertion hole and bends to fix the conductive element body to the mounting bracket.

4. The liquid heater according to claim 3, characterized in that, The mounting bracket has a positioning groove on its front side, and the conductive element has a raised ring around its edge, which engages with the positioning groove.

5. The liquid heater according to claim 4, characterized in that, The first and second insertion holes are located in the positioning groove, and the water detection sensor foot and the fixing clip are located on the protruding ring.

6. The liquid heater according to claim 1, characterized in that, Thermal grease is applied between the thermistor and the body of the conductive element.

7. The liquid heater according to claim 1, characterized in that, The mounting bracket includes a front bracket and a rear bracket. The front bracket is movably connected to the rear bracket and slides back and forth relative to the rear bracket. The rear bracket is fixed to the base. An elastic element is provided between the front bracket and the rear bracket to keep the conductive element in close contact with the kettle body. Alternatively, the mounting bracket includes a front bracket, a middle bracket, and a rear bracket. The front bracket and the middle bracket are connected to form a mounting cavity for accommodating the circuit board. The front bracket is slidably connected to the rear bracket. The rear bracket is fixed to the base. An elastic element is provided between the middle bracket and the rear bracket to keep the conductive element in close contact with the kettle body.

8. The liquid heater according to claim 1, characterized in that, The kettle body is made entirely of glass, and the base is equipped with a heating plate. The kettle body is placed on the heating plate, and the main body of the conductive component is in close contact with the outer wall of the kettle body.

9. The liquid heater according to claim 1, characterized in that, The kettle body includes a glass kettle body and a heating base. The outer bottom surface of the heating base is provided with an upper connector, and the base is provided with a lower connector. The kettle body is placed on the base, and the upper connector and the lower connector are plugged in and electrically coupled. The body of the conductive component is in close contact with the outer wall of the glass kettle body.

10. The liquid heater according to claim 1, characterized in that, The side of the conductive component facing the pot body is an arc surface that fits the outer wall of the pot body.

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