Liquid heater

Abstract

The utility model discloses a liquid heater which comprises a heating base and a glass kettle body placed on the heating base, the heating base is provided with a detection device extending upwards, the detection device comprises a fixing plate and a detection plate, the detection plate is movably arranged on the fixing plate so as to be attached to the glass kettle body, and the glass kettle body is arranged on the glass kettle body. The detection plate extends upwards to the position above the highest liquid level of the glass kettle body, and a plurality of capacitor pole pieces are arranged on the detection plate in the longitudinal direction. The detection plate extends upwards to the position above the highest liquid level of the glass kettle body, so that the detection plate has the anti-overflow detection effect, separated arrangement of the glass kettle body and the detection device is achieved, the design of switching mechanisms such as a coupler is omitted, the detection cost is greatly reduced, signal transmission is more timely, and the detection efficiency is improved. The response is quicker, and the anti-overflow effect is better.

Description

Technical Field

[0001] This application belongs to the field of household appliance technology, specifically relating to a liquid heater. Background Technology

[0002] Existing liquid heaters, taking health-preserving kettles as an example, generally include a base, a kettle body, and a lid. The kettle body has a hollow handle on one side and can be electrically connected to the base. The lid typically consists of a plastic cap and a metal cap located beneath the plastic cap. To use, the ingredients to be cooked are placed in the kettle body, water is added, the kettle body is placed on the base, and power is supplied to the base to begin cooking. To prevent overflow during cooking, existing health-preserving kettles have an anti-overflow electrode extending towards the inside of the kettle body on the lid and an electrical connector located on the side of the kettle body. The anti-overflow electrode and the electrical connector are electrically connected via a conductive structure. When the lid is placed on the kettle body, the electrical connector connects to a probe device located at the handle position on the kettle body. The anti-overflow signal detected by the anti-overflow electrode is then transmitted sequentially through the electrical connector and the probe device to the control board on the base, allowing for timely intervention and adjustment of the cooking program to prevent overflow.

[0003] However, as users' demands for food safety increase, the requirements for the materials of liquid heaters are also becoming more stringent, leading to a wider adoption of all-glass health pots. Unlike existing health pots, which can be fitted with plastic lids, metal lids, and plastic handles to accommodate anti-overflow electrodes and electrical connections, all-glass health pots cannot accommodate anti-overflow components in the lid and handle areas. This makes them prone to overflowing during use, especially when stewing food, significantly reducing the user experience. Furthermore, most existing all-glass health pots do not feature a separate design for liquid level detection and the pot body.

[0004] Patent document CN201920503052.9 discloses an electromagnetic heating kettle with an improved water level sensing device. The kettle includes an electromagnetic heating base and a glass kettle body placed on the base. The bottom of the glass kettle body has an electromagnetic heating element that works in conjunction with the base. A side support for the kettle body is mounted on the base, extending from the edge upwards. A water level sensing device is installed on the side support, elastically pressed against the outer wall of the glass kettle body via an elastic mechanism. While this design separates the liquid level detection from the glass kettle body, the upward extension of the side support is limited. The water level sensing device only senses the lowest water level within the kettle, preventing the kettle from becoming dry-boiled due to low water levels or lack of water, which could cause excessive temperature rise and shorten the kettle's lifespan. It lacks multi-level or overflow detection capabilities, failing to meet the multi-functional cooking needs of existing liquid heaters. Utility Model Content

[0005] This application provides a liquid heater to solve the technical problem that existing liquid heaters, when using an all-glass pot, cannot identify liquid level and foam, which can easily lead to overflow during cooking processes such as stewing.

[0006] The technical solution adopted in this application is as follows:

[0007] A liquid heater includes a heating base and a glass vessel placed on the heating base. The heating base is provided with an upwardly extending detection device. The detection device includes a fixing plate and a detection plate. The detection plate is movably disposed on the fixing plate to abut against the glass vessel. The detection plate extends upward to above the highest liquid level of the glass vessel. Multiple capacitor plates are arranged longitudinally on the detection plate.

[0008] This application achieves a separate arrangement of the glass container and the detection device. The detection device is located on the heating base. When the glass container is placed on the heating base, the detection plate moves and comes into contact with the glass container to detect the liquid level. Compared with the traditional liquid heater design that places the detection device between the cup and handle of the glass container, this separate design eliminates the need for coupling and other connecting mechanisms, significantly reducing detection costs. Furthermore, signal transmission is more timely, response is faster, and spill prevention is better. Moreover, the separate design of the detection device and the glass container eliminates the need for built-in electronic components inside the glass container, allowing users to clean the glass container separately and thoroughly without worrying about damaging internal components, greatly improving the user experience.

[0009] The detection plate of this application is equipped with multiple capacitor plates, enabling remote detection of liquid level and foam. Unlike the existing technology where the detection device is separate from the glass pot body, the detection plate in this application extends upwards above the highest liquid level in the glass pot body, giving it an anti-overflow detection function. In some stewing and simmering cooking programs, such as the cooking of herbal teas, health-preserving soups, white fungus soup, and red bean soup, the capacitor plates on the detection plate can quickly detect rising liquid levels and foam, preventing food and liquid from overflowing, thus avoiding food waste and reducing the user's cleaning burden.

[0010] The capacitor electrode includes a plurality of first capacitor electrodes, which form an anti-overflow detection area on the detection plate.

[0011] This technical solution improves detection accuracy by setting multiple first capacitor plates. The overflow prevention detection area formed by multiple first capacitor plates helps to increase the sensing area and detection coverage area, ensuring detection efficiency and accuracy. Moreover, the setting of multiple first capacitor plates ensures that if one first capacitor plate is damaged or fails to function for other reasons, the other first capacitor plates can still achieve the detection effect, avoiding overflow detection failure.

[0012] The capacitor electrode also includes a plurality of second capacitor electrodes, which form a water level detection area on the detection plate, and the water level detection area is located below the overflow detection area.

[0013] This technical solution enables water level detection in the liquid heater by setting multiple second capacitor plates, allowing for different water level detections for different pulping capacities, thereby increasing the functionality of the detection component and meeting user needs.

[0014] The detection device further includes a protective plate, which cooperates with the fixing plate to form a cavity for accommodating the detection plate. The protective plate has a contact surface that abuts against the glass pot body. The contact surface is planar. The glass pot body is provided with a first mating surface that can abut against the contact surface. The first mating surface is also planar.

[0015] This technical solution achieves a concealed arrangement of the detection plate by embedding it within a cavity formed by a protective plate and a fixing plate. This avoids the impact of external moisture, impurities, and dirt on the detection plate's accuracy and lifespan, and also isolates it from external interference signals to a certain extent, ensuring the stability of the detection plate's working environment. The planar contact between the protective plate and the glass container ensures a tight fit, reducing air gaps and improving liquid level detection accuracy. Furthermore, the planar contact maximizes the detection area, allowing for the acquisition of the largest signal change when foam is generated within the glass container, providing more reference data for subsequent signal processing and judgment, further enhancing detection accuracy. From a manufacturing perspective, the planar contact allows the detection plate to be made of rigid circuit boards, resulting in relatively low cost.

[0016] The glass pot body is also provided with a second mating surface that is symmetrically arranged with the first mating surface along the axial direction of the glass pot body, and the second mating surface is also a plane.

[0017] Different users have different left- or right-handed usage habits, and their standing habits when placing the glass pot on the heating base also vary. This diversity in user preferences leads to situations where the first mating surface of the glass pot is not aligned with the contact surface on the protective plate, or even not in contact at all. This causes the anti-overflow detection to fail. To avoid this, users would either need to pay sufficient attention to align the protective plate and the first mating surface when placing the glass pot, or install a corresponding position detection device to alert the user of misalignment or displacement via alarm. However, the former obviously reduces the user experience, while the latter significantly increases the overall cost. Therefore, this technical solution provides a second mating surface symmetrically arranged with the first mating surface. This second mating surface is also planar, allowing the user to detect the liquid level inside the glass pot after placement, regardless of whether the first or second mating surface faces the protective plate, thus improving the user adaptability of the liquid heater.

[0018] The detection device also includes a protective plate, which, together with the fixing plate, forms a cavity for accommodating the detection plate. The protective plate has a contact surface that abuts against the glass pot body, and the contact surface is an arc surface that matches the curvature of the outer wall of the glass pot body.

[0019] This technical solution achieves a concealed arrangement of the detection plate by embedding it within a cavity formed by a protective plate and a fixing plate. This avoids the impact of external moisture, impurities, and dirt on the detection plate's accuracy and lifespan, and also isolates it from external interference signals to a certain extent, ensuring the stability of the detection plate's working environment. The protective plate and the glass container body have a planar contact, ensuring a tight fit and reducing air gaps, thereby improving liquid level detection accuracy. Furthermore, the contact surface between the protective plate and the glass container body is designed as a curved surface, which matches the curvature of the glass container's outer wall, ensuring an even tighter contact, reducing air gaps, and improving liquid level detection accuracy. In addition, the curved design of the contact surface makes the entire detection device more compact and the overall shape smoother, improving the overall appearance and user experience.

[0020] The glass pot body includes a pot body and a spout protruding from the pot body, wherein the lowest protruding position of the spout is lower than the top surface of the detection plate.

[0021] This technical solution sets the lowest protruding position of the spout below the top surface of the detection plate, providing a clear indication to the user during the placement of the glass pot. If the spout is directly facing the detection device, the spout's protrusion and height will cause it to interfere with the detection device, thus prompting the user to change the placement position and avoid the spout being directly facing the detection device. This prevents problems such as spill detection failure and reduced service life caused by the detection device being directly facing the spout in long-term high-temperature and high-humidity fumigation environments.

[0022] The detection device further includes an isolation plate located between the fixed plate and the detection plate, and an elastic element is provided between the isolation plate and the fixed plate. The detection plate moves relative to the fixed plate under the elastic force of the elastic element.

[0023] This technical solution eliminates the need for a power drive mechanism and position detection elements by using an elastic element to move the detection plate relative to the fixed plate. This reduces the driving cost of the detection plate and simplifies the structure of the detection device. By adding an isolation plate between the elastic element and the detection plate, two things are prevented: firstly, one end of the elastic element directly presses against the detection plate, thus preventing damage to the electronic components and circuitry on the back of the detection plate; secondly, when the elastic element is made of metal, further optimization of the isolation plate design can also provide signal shielding, preventing interference from the elastic element to the detection of the capacitor plates on the detection plate, and ensuring the accuracy and reliability of the detection data.

[0024] The isolation plate has anti-pressure ribs on the side facing the detection plate, and the anti-pressure ribs abut against the detection plate at the position between two adjacent capacitor plates on the detection plate.

[0025] The ideal contact point between the isolation plate and the detection plate is an area on the detection plate that is free of electronic components or circuitry and thus resistant to damage from pressure. However, current household appliances tend towards compact and refined designs. For this type of liquid heater, a similar miniaturized detection plate design is required. Therefore, the selection of the contact point for the isolation plate is particularly important given the limited space on the detection plate. This technical solution utilizes the redundant space on the detection plate by setting an anti-pressure rib on one side of the isolation plate, with the rib contacting the detection plate between two adjacent capacitor plates. This effectively protects the components on the detection plate and extends its service life by avoiding direct pressure on the electronic components and circuitry.

[0026] The projection of the elastic element on the isolation plate and the projection of the anti-pressure rib on the isolation plate are misaligned.

[0027] In this technical solution, the staggered arrangement of the elastic element and the anti-pressure ribs can disperse the stress of the elastic element and avoid stress concentration, thereby making the force on the detection plate more uniform, reducing the phenomenon of local stress concentration, extending the service life of the detection plate, and ensuring the stability and reliability of the detection. In addition, the staggered arrangement of the elastic element and the anti-pressure ribs can also ensure that the detection plate is more stable during movement, reducing shaking and noise. Attached Figure Description

[0028] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0029] Figure 1 This is a perspective view of a liquid heater according to one embodiment of this application;

[0030] Figure 2 This is a cross-sectional view of a liquid heater according to one embodiment of this application;

[0031] Figure 3 for Figure 2 Enlarged view of part A;

[0032] Figure 4 This is an exploded view of the heating base according to one embodiment of this application.

[0033] in,

[0034] 1. Heating base; 11. Base; 12. Surrounding edge; 13. Placement slot; 14. Telescopic opening;

[0035] 2. Detection board; 21. Capacitor electrode;

[0036] 3. Protective plate; 31. Contact surface;

[0037] 4. Isolation plate; 41. Limiting rib;

[0038] 5. Elastic components;

[0039] 6. Fixing plate; 61. Circular raised rib;

[0040] 7. Glass pot body; 71. Pot body; 72. Spout. Detailed Implementation

[0041] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0042] Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below. It should be noted that, unless otherwise specified, the embodiments of this application and the features thereof can be combined with each other.

[0043] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0044] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0045] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0046] like Figure 1 and Figure 4 As shown, a liquid heater includes a heating base 1 and a glass vessel 7 placed on the heating base 1. The heating base 1 is provided with an upwardly extending detection device. The detection device includes a fixing plate 6 and a detection plate 2. The detection plate 2 is movably disposed on the fixing plate 6 to abut against the glass vessel 7. The detection plate 2 extends upward to above the highest liquid level of the glass vessel 7. Multiple capacitor plates 21 are arranged longitudinally on the detection plate 2.

[0047] The liquid heater in this application can be a health pot, a food processor, or a soy milk maker, etc.

[0048] This application does not limit the specific composition of the glass pot body 7. In one embodiment, the glass pot body 7 includes a glass cup body, a plastic lid that covers the opening at the top of the glass cup body, and a plastic handle located on one side of the glass cup body. In another embodiment, the glass pot body 7 includes a glass cup body, a glass lid that covers the opening at the top of the glass cup body, and a glass handle located on one side of the glass cup body.

[0049] This application achieves a separate arrangement between the glass pot body 7 and the detection device. The detection device is located on the heating base 1. When the glass pot body 7 is placed on the heating base 1, the detection plate 2 moves and comes into contact with the glass pot body 7 to achieve liquid level detection. Compared with the traditional liquid heater design that places the detection device between the cup and handle of the glass pot body, the separate design of this application eliminates the need for the design of a coupling or other conversion mechanism, significantly reducing detection costs. Furthermore, signal transmission is more timely, response is faster, and the anti-overflow effect is better. Moreover, the separate design of the detection device and the glass pot body 7 eliminates the need for built-in electronic components in the glass pot body 7, allowing users to clean the glass pot body 7 separately and thoroughly without worrying about damaging the internal components, greatly improving the user experience.

[0050] The detection plate 2 of this application is equipped with multiple capacitor plates 21, enabling airless detection of liquid level and foam. Unlike the separate design of the detection device from the glass pot body in the prior art, the detection plate 2 of this application extends upward above the highest liquid level in the glass pot body 7, so that the detection plate 2 of this application has the function of preventing overflow. In some stewing and cooking programs, such as the cooking programs of herbal tea, health soup, white fungus soup, red bean soup, etc., the capacitor plates 21 on the detection plate 2 can quickly detect the rising liquid level and foam, avoiding the overflow of food and liquid, thus avoiding food waste and reducing the user's cleaning burden.

[0051] In a preferred embodiment of this application, the capacitor electrode 21 includes a plurality of first capacitor electrodes, which form an anti-overflow detection area on the detection plate 2. By setting multiple first capacitor electrodes, the detection accuracy can be improved. The anti-overflow detection area formed by the multiple first capacitor electrodes helps to increase the sensing area and detection coverage area, ensuring detection efficiency and accuracy. Moreover, the setting of multiple first capacitor electrodes ensures that when one of the first capacitor electrodes is damaged or fails to function for other reasons, the other first capacitor electrodes can still achieve the detection effect, avoiding the failure of anti-overflow detection.

[0052] Furthermore, the capacitor electrode 21 also includes multiple second capacitor electrodes, which form a water level detection area on the detection plate 2, located below the overflow detection area. By setting multiple second capacitor electrodes, water level detection of the liquid heater can be achieved, and different water level detections can be performed for different pulping capacities, further increasing the functionality of the detection component and meeting the user's needs.

[0053] In another embodiment of this application, a plurality of capacitor plates 21 are arranged at longitudinal intervals on the detection plate 2, forming an anti-overflow detection area on the detection plate 2 to prevent the liquid from overflowing during cooking. In this embodiment, the dry-burn detection of the liquid heater can be achieved by installing a temperature sensor or other detection element on the heating base 1.

[0054] The specific composition of the detection device in this application can adopt any of the following embodiments:

[0055] Implementation method one: such as Figure 2 and Figure 4 As shown, the detection device also includes a protective plate 3. The protective plate 3 and the fixing plate 6 cooperate to form a cavity for accommodating the detection plate 2. The protective plate 3 has a contact surface 31 that abuts against the glass pot body 7. The contact surface 31 is a plane. The glass pot body 7 is provided with a first mating surface that can abut against the contact surface 31. The first mating surface is also a plane.

[0056] In this embodiment, the detection plate 2 is embedded within the cavity formed by the protective plate 3 and the fixing plate 6, achieving a concealed arrangement of the detection plate 2. This avoids the impact of external moisture, impurities, and dirt on the detection accuracy and lifespan of the detection plate 2. Furthermore, it isolates external interference signals to a certain extent, ensuring the stability of the working environment of the detection plate 2. The protective plate 3 and the glass container 7 are in planar contact, ensuring a tight fit between them and reducing air gaps, thereby improving the accuracy of liquid level detection. Moreover, the planar contact maximizes the detection area, allowing for the acquisition of the largest signal change when foam is generated within the glass container 7, providing more reference data for subsequent signal processing and judgment, further improving detection accuracy. From a manufacturing perspective, the planar contact allows the detection plate 2 to be made of a rigid circuit board, resulting in relatively low cost.

[0057] Preferably, the detection plate 2 is glued to the protective plate 3 on the side facing away from the glass pot body 7, so as to simplify the assembly between the detection plate 2 and the protective plate 3 and reduce the detection distance between the detection plate 2 and the glass pot body 7.

[0058] As a preferred embodiment of this invention, the detection device further includes a guide structure for guiding the movement of the protective plate 3 relative to the fixed plate 6. The guide structure is designed so that the protective plate 3, together with the detection plate 2 fixedly installed on the protective plate 3, can move stably along a preset path to accurately fit the outer surface of the glass container 7. For example, the guide structure includes a guide groove provided on one of the protective plate 3 and the fixed plate 6, and a guide rib provided on the other of the protective plate 3 and the fixed plate 6.

[0059] Different users have different left- and right-handed usage habits, and their standing habits when placing the glass kettle 7 on the heating base 1 also vary. This diversity in user preferences leads to situations where the first mating surface of the glass kettle 7 is not aligned with the contact surface 31 on the protective plate 3, or even not in contact at all. This causes the anti-overflow detection to fail. To avoid this, users would need to pay sufficient attention to aligning the protective plate 3 and the first mating surface when placing the glass kettle 7, or a corresponding position detection device would be installed to alert the user of misalignment or displacement via alarm information. However, the former would obviously reduce the user experience, while the latter would significantly increase the overall cost. Therefore, in a preferred embodiment of this invention, the glass kettle 7 also has a second mating surface symmetrically arranged along the axial direction of the glass kettle 7 and the first mating surface. This second mating surface is also planar. This arrangement ensures that when placing the kettle, regardless of whether the first mating surface or the second mating surface faces the protective plate 3, the user can ensure proper alignment.

[0060] Both can detect the liquid level inside the glass container 7 after placement, improving the user adaptability of the liquid heater.

[0061] Implementation Method 2: This implementation method is not illustrated. In this implementation method, the detection device also includes a protective plate. The protective plate and the fixing plate cooperate to form a cavity for accommodating the detection plate. The protective plate has a contact surface that abuts against the glass pot body. The contact surface is an arc surface that matches the curvature of the outer wall of the glass pot body.

[0062] This second embodiment achieves a concealed arrangement of the detection plate by embedding it within a cavity formed by the protective plate and the fixing plate. This avoids the impact of external moisture, impurities, and dirt on the detection plate's accuracy and lifespan, and also isolates it from external interference signals to a certain extent, ensuring the stability of the detection plate's working environment. The protective plate and the glass container body are in planar contact, ensuring a tight fit and reducing air gaps, thereby improving liquid level detection accuracy. Furthermore, this technical solution designs the contact surface between the protective plate and the glass container body as a curved surface, which matches the curvature of the outer wall of the glass container body 7, ensuring a tighter contact between the protective plate 3 and the glass container body 7, reducing air gaps and improving liquid level detection accuracy. In addition, the curved design of the contact surface 31 makes the entire detection device more compact and the overall shape smoother, improving the overall appearance and user experience.

[0063] Implementation Method 3: This implementation method is not illustrated. In this implementation method, the detection device also includes a protective plate. The protective plate and the fixing plate cooperate to form a cavity for accommodating the detection plate. The protective plate has a contact surface that abuts against the glass pot body. The contact surface is flat, and the outer wall of the glass pot body is curved.

[0064] As a preferred embodiment of this application, such as Figure 1 As shown, the glass kettle body 7 includes a kettle body 71 and a spout 72 protruding from the kettle body 71. The lowest protruding position of the spout 72 is lower than the top surface of the detection plate 2. By setting the lowest protruding position of the spout 72 to be lower than the top surface of the detection plate 2, a clear prompt can be provided when the user places the glass kettle body 7. That is, if the spout 72 is directly facing the detection device, the protruding design and position of the spout 72 will cause it to interfere with the detection device, thus clearly indicating to the user to change the placement position and avoid the spout 72 being directly facing the detection device. This can avoid problems such as spillage detection failure and reduced service life caused by the detection device being directly facing the spout 72 in a long-term high-temperature and high-humidity fumigation environment.

[0065] The movement of the detection plate in this application can be achieved using any of the following embodiments:

[0066] Implementation Method 3: This implementation method is not illustrated. In this implementation method, the detection device further includes a drive unit for moving the detection plate and a detection mechanism for detecting whether the glass pot is placed on the heating base. When the detection mechanism detects that the glass pot has been placed in a preset position on the heating base, the detection mechanism transmits a detection signal to the control unit of the liquid heater. After receiving the signal, the control unit controls the drive unit to move the detection plate to the detection position.

[0067] In this third embodiment, the driving unit does not limit the movement of the driving detection plate: in one embodiment, the driving unit drives the detection plate to slide horizontally to switch between the detection position and the initial position (a position away from the detection position to avoid interference with the placement of the glass pot); in another embodiment, the driving unit drives the detection plate to swing to switch between the detection position and the initial position.

[0068] Implementation Method Four: (e.g.) Figures 2 to 4 As shown, the detection device also includes an isolation plate 4 located between the fixed plate 6 and the detection plate 2. An elastic element 5 is provided between the isolation plate 4 and the fixed plate 6, and the detection plate 2 moves relative to the fixed plate 6 under the elastic force of the elastic element 5.

[0069] This fourth embodiment, by setting an elastic element 5 to move the detection plate 2 relative to the fixed plate 6, eliminates the need for a power drive mechanism and position detection elements, thus reducing the driving cost of the detection plate 2 and simplifying the structure of the detection device. By adding an isolation plate 4 between the elastic element 5 and the detection plate 2, it prevents one end of the elastic element 5 from directly pressing against the detection plate 2 and damaging the electronic components and circuitry on the back of the detection plate 2. Furthermore, when the elastic element 5 is made of metal, further optimization of the isolation plate 4's design (e.g., adding a groundable material such as a metal plate, metal mesh, or conductive coating to the isolation plate 4) can also serve as signal shielding, preventing the elastic element 5 from interfering with the detection of the capacitor plates 21 on the detection plate 2, thus ensuring the accuracy and reliability of the detection data from the detection plate 2.

[0070] As a preferred embodiment of this fourth implementation method, such as Figure 4As shown, the heating base 1 includes a base 11 and a surrounding portion 12 located above the base 11. The surrounding portion 12 and the top surface of the base 11 cooperate to form a placement groove 13 for placing the glass pot 7 and radially limiting the glass pot 7. The surrounding portion 12 has an installation port, and the bottom of the detection device is located at the installation port. The surrounding portion 12 also has a telescopic opening 14 connecting the installation port and the placement groove 13. When the glass pot 7 is not placed in the placement groove 13, the protective plate 3 and the detection plate 2 extend into the placement groove 13 through the telescopic opening 14 under the action of the elastic member 5. When the glass pot 7 is placed in the placement groove 13, under the action of the glass pot 7, the protective plate 3 and the detection plate 2 overcome the elastic force of the elastic member 5 and retract along the telescopic opening 14 into the installation port, and fit against the outer surface of the glass pot 7.

[0071] In this fourth embodiment, the contact position between the isolation plate and the detection plate can be any one of the following embodiments:

[0072] Example 1: This example 1 is not illustrated. In this example 1, the detection plate has a clearance area above and below the multiple capacitor plates. The isolation plate abuts against the clearance area to avoid pressing against the capacitor plates.

[0073] Example 2: As Figures 2 to 4 As shown, the isolation plate 4 has anti-pressure ribs on the side facing the detection plate 2, and the contact position between the anti-pressure ribs and the detection plate 2 is located between two adjacent capacitor plates 21 on the detection plate 2.

[0074] The preferred contact position between the isolation plate 4 and the detection plate 2 is an area on the detection plate 2 that is free from electronic components or circuits and thus resistant to damage from pressure. However, current household appliances tend towards compact and refined designs. For this type of liquid heater, a miniaturized design of the detection plate 2 is also required. Therefore, the selection of the contact position of the isolation plate 4 is particularly important given the limited space of the detection plate 2. In this embodiment 2, an anti-pressure rib is provided on one side of the isolation plate 4, and the contact position between the anti-pressure rib and the detection plate 2 is located between two adjacent capacitor plates 21. This fully utilizes the redundant space on the detection plate 2, avoiding direct pressure on the electronic components and circuits on the detection plate 2, thereby effectively protecting the components on the detection plate 2 and extending its service life.

[0075] As a preferred example under this embodiment 2, such as Figure 3As shown, the projection of the elastic element 5 on the isolation plate 4 and the projection of the anti-pressure rib on the isolation plate 4 are misaligned. In this example, the misaligned arrangement of the elastic element 5 and the anti-pressure rib can disperse the stress of the elastic element 5, avoid stress concentration, thereby making the force on the detection plate 2 more uniform, reducing the phenomenon of local stress concentration, improving the service life of the detection plate 2, and ensuring the stability and reliability of the detection. In addition, the misaligned arrangement of the elastic element 5 and the anti-pressure rib can also ensure that the detection plate 2 is more stable during movement, reducing shaking and noise.

[0076] Furthermore, the fixing plate 6 and / or the isolation plate 4 are provided with circular protruding ribs 61 that are opposite to the position of the elastic member 5. One end or both ends of the elastic member 5 are placed in the circular protruding ribs 61 to limit the elastic member 5 and ensure that the elastic member 5 will not be displaced during the deformation process, so that the detection plate 2 can move according to the preset moving path.

[0077] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0078] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0079] The above are merely embodiments of this application and are not intended to limit this application. The technical features or structures in the foregoing different embodiments can be arbitrarily combined to form other specific technical solutions as needed. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this application should be included within the scope of the claims of this application.

Claims

1. A liquid heater comprising a heating base and a glass jug placed on the heating base, characterized in that, The heating base is provided with upwardly extending detection device, the detection device includes fixed plate and detection plate, the detection plate is movably provided on the fixed plate to abut against the glass kettle body, the detection plate extends upwardly above the highest liquid level of the glass kettle body, a plurality of capacitive plates are arranged on the detection plate in longitudinal direction.

2. The liquid heater according to claim 1, wherein The capacitive plates include a plurality of first capacitive plates, and the plurality of first capacitive plates form an anti-overflow detection area on the detection plate.

3. The liquid heater according to claim 2, wherein The capacitive plates further include a plurality of second capacitive plates, and the plurality of second capacitive plates form a water level detection area on the detection plate, and the water level detection area is located below the anti-overflow detection area.

4. The liquid heater according to claim 1, wherein The detection device further includes a protection plate, the protection plate cooperates with the fixed plate to enclose a receiving cavity for accommodating the detection plate, the protection plate has a contact surface abutting against the glass kettle body, the contact surface is a plane, and the glass kettle body is provided with a first matching surface capable of abutting against the contact surface, and the first matching surface is also a plane.

5. The liquid heater according to claim 4, wherein The glass kettle body is further provided with a second matching surface symmetrically arranged with the first matching surface along the axial direction of the glass kettle body, and the second matching surface is also a plane.

6. The liquid heater according to claim 1, wherein The detection device further includes a protection plate, the protection plate cooperates with the fixed plate to enclose a receiving cavity for accommodating the detection plate, the protection plate has a contact surface abutting against the glass kettle body, and the contact surface is an arc surface matched with the curvature of the outer wall of the glass kettle body.

7. The liquid heater according to claim 1, wherein The glass kettle body includes a kettle body and a kettle spout protruding from the kettle body, and the lowest protruding position of the kettle spout is lower than the top end surface of the detection plate.

8. The liquid heater according to any one of claims 1 to 7, wherein The detection device further includes a separation plate between the fixed plate and the detection plate, and an elastic member is arranged between the separation plate and the fixed plate, and the detection plate moves relative to the fixed plate under the elastic force of the elastic member.

9. The liquid heater according to claim 8, wherein The side of the separation plate facing the detection plate is provided with a pressure prevention protruding rib, and the abutting position of the pressure prevention protruding rib and the detection plate is located between two adjacent capacitive plates on the detection plate.

10. The liquid heater according to claim 9, wherein The projection of the elastic member on the separation plate and the projection of the pressure prevention protruding rib on the separation plate are mutually staggered.

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