A liquid heater

Abstract

The utility model discloses a liquid heater, including inner bag and heating disc still include support assembly, support assembly includes first support and second support, and the heat resistance of second support is higher than the heat resistance of first support, be equipped with through -hole on first support, and second support passes through the through -hole and is clamped on first support, and second support is locked with heating disc through locking piece, and second support is separated between first support and locking piece. The utility model sets up support assembly into the combined structure of first support and second support, so that the second support of heat resistance higher than first support can be used as separator, avoid first support and heating disc direct contact. Through setting up second support with first support clamping structure, so that this part assembly can be split into two assembly procedures, in the prior procedure, the assembly forms support assembly, then support assembly participates in the assembly procedure of later, greatly reduces assembly difficulty, improves assembly efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of liquid heating equipment, and specifically relates to a liquid heater. Background Technology

[0002] Liquid heaters used in electric kettles for boiling water and brewing tea typically consist of an inner tank, a heating plate, and a bottom cover (or bracket) mounted on the bottom of the heating plate. The heating plate is fixed to the bottom of the inner tank to heat the liquid inside. The bottom cover (or bracket) is located below the heating plate and is secured to it with screws. When the heating plate is operating at a high temperature, the heat from it is directly transferred to the less heat-resistant bottom cover (or bracket) through the metal screws. This can easily cause the connection between the bottom cover (or bracket) and the heating plate to overheat, deform, or become damaged, affecting the user experience.

[0003] To address the issue of overheating and deformation of the bottom cover (or bracket), the current common solution is to use a heat insulation component for separation, as described in patent documents CN201820009925.6 and CN202420719120.6. In this solution, a heat insulation component is placed between the screw and the through hole through which the screw passes to separate the two. While the screw passes through the through hole and locks itself with the stud of the heating plate, the heat insulation component is also pressed between the screw and the through hole to prevent the heating plate from directly transferring heat to the bottom cover or bracket through the screw.

[0004] However, in the above solution, the heat insulation component needs to be clamped between the screws and the bottom cover (or bracket) while the screws, bottom cover (or bracket) and heating plate are being tightened. That is, the assembly of the heat insulation component and the tightening of the screws need to be completed in the same assembly process. This process not only requires the alignment of the bottom cover (or bracket) and the heating plate, but also the alignment of the heat insulation component with the bottom cover (or bracket) and the heating plate at the same time. The assembly is difficult and results in low assembly efficiency. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a liquid heater to solve the problems of low assembly efficiency of brackets and heat insulation structures used for mounting circuit boards and heating plates.

[0006] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: a liquid heater, including an inner tank and a heating plate fixed to the bottom of the inner tank, and a support assembly disposed below the inner tank. The support assembly includes a first support with a circuit board at its bottom and a second support mounted on the first support. The heat resistance of the second support is higher than that of the first support. The first support has a longitudinally extending through hole, through which the second support passes and is snapped onto the first support. The second support is locked to the heating plate by a locking member, and the second support is separated between the first support and the locking member. This technical solution has the following technical effects:

[0007] This invention configures the bracket assembly for mounting the circuit board as a combination of a first bracket and a second bracket. The circuit board is mounted on the first bracket, and the second bracket is locked to the heating plate by a locking member. This allows the second bracket, with its higher heat resistance than the first bracket, to act as a separator between the heating plate and the first bracket, preventing direct contact between them and thus avoiding rapid heat transfer from the heating plate to the first bracket. Simultaneously, the second bracket also acts as a separator between the locking member and the first bracket. Since the locking member on the heating plate is typically made of metal with high thermal conductivity, it heats up rapidly along with the heating plate. The second bracket, positioned between the first bracket and the locking member, not only has high heat resistance but also blocks heat transfer between them. The second bracket significantly reduces the heat transferred to the first bracket, ensuring its stable mounting under the heating plate while preventing excessive heating and deformation or damage. This provides protection for the first bracket and the circuit board mounted on it. By configuring the second bracket to snap onto the first bracket, the assembly of the liquid heater, including the first bracket, the second bracket, the heating plate, and the locking mechanism, can be separated into two assembly steps. In the first step, only the second bracket needs to be snapped onto the first bracket to form the bracket assembly. During this process, only the alignment of the first and second brackets is required. After the assembly of all bracket assemblies is completed in this step, the first and second brackets participate in the subsequent assembly step as bracket assemblies to assemble the bracket assembly, the heating plate, and the locking mechanism. During this process, only the alignment of the second bracket and the heating plate is required, greatly reducing the assembly difficulty and improving the assembly efficiency.

[0008] In the aforementioned liquid heater, the second support is a heat insulation sleeve. The heat insulation sleeve includes a sleeve body and a snap-fit ​​portion and a stop portion integrally formed on the outer wall of the sleeve body. The sleeve body passes through a through hole, and the snap-fit ​​portion and the stop portion abut against the first supports at the upper and lower ends of the through hole, respectively, to snap the heat insulation sleeve onto the first supports. During installation, the end of the sleeve body with the snap-fit ​​portion is inserted into the through hole. The snap-fit ​​portion and the sleeve body deform and enter the through hole until the stop portion abuts against the first support at one end of the through hole. At this time, the snap-fit ​​portion and the sleeve body pass over the inner wall of the through hole and return to their original position. The snap-fit ​​portion abuts against the first support at the other end of the through hole. The snap-fit ​​portion and the stop portion integrally formed with the sleeve body abut against the first support to limit the movement of the sleeve body, so that the sleeve body is always fixed between the inner wall of the through hole and the locking element. This ensures the separation between the heat insulation sleeve and the first support and the locking element, facilitating installation, making the assembly more stable, and providing good heat insulation.

[0009] In the aforementioned liquid heater, the locking element is a locking screw. The sleeve has a mounting hole, through which the locking screw extends into the threaded hole on the heating plate to lock it in place. The cross-sectional area of ​​the mounting hole is larger than that of the threaded hole, and the projection of the threaded hole onto the horizontal plane is entirely within the projection of the mounting hole onto the horizontal plane. When aligning the mounting hole of the heat insulation sleeve with the threaded hole of the heating plate, the mounting hole does not need to be precisely aligned with the threaded hole; it is sufficient that the projection of the threaded hole onto the horizontal plane is entirely within the projection of the mounting hole onto the horizontal plane. This avoids the assembly tolerances of the heat insulation sleeve affecting the alignment of the mounting hole with the threaded hole, thus reducing assembly difficulty.

[0010] In the aforementioned liquid heater, the stop portion is an annular stop rib surrounding the sleeve body. The annular stop rib has two longitudinally penetrating notches, located on opposite sides of the rib with their openings facing opposite directions. These notches guide and position the insulation sleeve during assembly and also provide gripping positions for the operator's fingers, facilitating the installation and removal of the insulation sleeve.

[0011] In the aforementioned liquid heater, multiple snap-fit ​​parts are provided, and these snap-fit ​​parts are evenly distributed along the circumference of the sleeve. Each snap-fit ​​part is either a snap-fit ​​protrusion extending from the outer wall of the sleeve or an elastic snap plate with one end connected to the sleeve. Arranging multiple snap-fit ​​parts at equal intervals allows for more uniform force distribution around the sleeve, resulting in a more stable and reliable connection between the heat insulation sleeve and the first support.

[0012] In the aforementioned liquid heater, the stop part is an annular stop rib arranged around the sleeve body. The first bracket is provided with an annular groove arranged around the through hole. The annular stop rib is embedded in the annular groove to enhance the limiting effect on the heat insulation sleeve in the horizontal direction and prevent the annular stop rib from being impacted in the horizontal direction.

[0013] In the aforementioned liquid heater, the inner diameter of the through-hole gradually increases along the central axis of the through-hole towards the annular groove, so that the inner wall of the through-hole is inclined towards the annular groove. When installing the heat insulation sleeve onto the first bracket, because the diameter of the through-hole is larger at the end near the annular groove, the sleeve does not need to be precisely aligned with the through-hole during installation. During the installation process, the inner wall of the through-hole, which is inclined towards the annular groove, can guide the sleeve and the locking part, and can also gradually compress the sleeve and the locking part, so that the sleeve and the locking part deform, making the installation easier.

[0014] In the aforementioned liquid heater, the heating plate includes a plate body, a heating element disposed at the bottom of the plate body, and a mounting post extending downward from the bottom surface of the plate body to connect a locking member. The mounting post abuts against a second bracket, and the bottom surface of the mounting post is lower than the bottom surface of the heating element, thereby forming a separation gap between the heating element and the first bracket. By setting the vertical height of the mounting post to be greater than the vertical height of the heating element, when the mounting post abuts against the second bracket, the distance between the heating plate and the first bracket is greater than the height of the heating element. This allows a heat-insulating gap of a certain height to be formed between the heating element mounted on the bottom surface of the heating plate and the first bracket. This heat-insulating gap separates the heating element and the first bracket, preventing the heating element from directly contacting the first bracket, thereby preventing the heat from the heating element from being transferred to the first bracket through direct contact and reducing the heat transferred from the heating element to the first bracket.

[0015] In the aforementioned liquid heater, the bottom of the inner tank has an opening, and the heating plate is fixed to the bottom of the inner tank to close the opening. The heating plate and the inner tank together form a cavity for containing the liquid. The heating plate heats the liquid directly through its heat-conducting surface at the top, resulting in high heating efficiency.

[0016] In the aforementioned liquid heater, the inner liner includes an inner liner bottom and an inner liner body extending upward from the inner liner bottom. The inner liner bottom and the inner liner body together form a receiving cavity for containing liquid. A heating plate is installed on the side of the inner liner bottom facing away from the receiving cavity. The heating plate is installed on the side of the inner liner bottom facing away from the receiving cavity so that the liquid in the receiving cavity is heated by heating the inner liner bottom. Since the inner liner bottom and the inner liner body together form the receiving cavity, there is no need to seal the lower part of the receiving cavity, reducing manufacturing difficulty.

[0017] The features and advantages of this utility model will be disclosed in detail in the following specific embodiments and accompanying drawings. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0019] Figure 1 This is a perspective view of the liquid heater in Example 1;

[0020] Figure 2 This is an exploded view of the liquid heater in Example 1;

[0021] Figure 3 This is a cross-sectional view of the liquid heater in Example 1;

[0022] Figure 4 for Figure 3 Enlarged view of part A;

[0023] Figure 5This is a cross-sectional view of the first support in Embodiment 1;

[0024] Figure 6 for Figure 5 Enlarged view of part B;

[0025] Figure 7 This is a cross-sectional view of the second bracket in Embodiment 1;

[0026] Figure 8 This is a schematic diagram of the assembly of the second bracket and the locking screw in Embodiment 1.

[0027] Figure label:

[0028] 100. Inner liner; 110. Receiving cavity;

[0029] 200. Heating plate; 210. Plate body; 220. Heating element; 230. Mounting post; 231. Screw hole; 240. Separation gap;

[0030] 300. Bracket assembly;

[0031] 400, First bracket; 410, Through hole; 420, Annular groove; 421, Annular rib; 430, Mounting groove;

[0032] 500. Second bracket; 510. Heat insulation sleeve; 511. Sleeve body; 5111. Mounting hole; 512. Snap-fit ​​part; 513. Stop part; 5131. Annular stop rib; 5132. Notch;

[0033] 600. Locking component; 610. Locking screw; 611. Rod; 612. Head. Detailed Implementation

[0034] This utility model proposes a liquid heater, including an inner tank and a heating plate fixed to the bottom of the inner tank, and a support assembly located below the inner tank. The support assembly includes a first support with a circuit board at the bottom and a second support mounted on the first support. The heat resistance of the second support is higher than that of the first support. The first support has a longitudinally extending through hole. The second support passes through the through hole and is snapped onto the first support. The second support is locked to the heating plate by a locking member. The second support is separated between the first support and the locking member. This invention configures the bracket assembly for mounting the circuit board as a combination of a first bracket and a second bracket. The circuit board is mounted on the first bracket, and the second bracket is locked to the heating plate by a locking member. This allows the second bracket, with its higher heat resistance than the first bracket, to act as a separator between the heating plate and the first bracket, preventing direct contact between them and thus avoiding rapid heat transfer from the heating plate to the first bracket. Simultaneously, the second bracket also acts as a separator between the locking member and the first bracket. Since the locking member on the heating plate is typically made of metal with high thermal conductivity, it heats up rapidly along with the heating plate. The second bracket, positioned between the first bracket and the locking member, not only has high heat resistance but also blocks heat transfer between them. The second bracket significantly reduces the heat transferred to the first bracket, ensuring its stable mounting under the heating plate while preventing excessive heating and deformation or damage. This provides protection for the first bracket and the circuit board mounted on it. By configuring the second bracket to snap onto the first bracket, the assembly of the liquid heater, including the first bracket, the second bracket, the heating plate, and the locking mechanism, can be separated into two assembly steps. In the first step, only the second bracket needs to be snapped onto the first bracket to form the bracket assembly. During this process, only the alignment of the first and second brackets is required. After the assembly of all bracket assemblies is completed in this step, the first and second brackets participate in the subsequent assembly step as bracket assemblies to assemble the bracket assembly, the heating plate, and the locking mechanism. During this process, only the alignment of the second bracket and the heating plate is required, greatly reducing the assembly difficulty and improving the assembly efficiency.

[0035] The technical solutions of the present utility model will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of the present utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present utility model.

[0036] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0038] In this utility model, unless otherwise explicitly 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 connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0039] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] Example 1:

[0041] A liquid heater, such as Figures 1 to 8As shown, the assembly includes an inner liner 100, a heating plate 200, and a support assembly 300. An opening is provided at the bottom of the inner liner 100. The heating plate 200 is fixed to the bottom of the inner liner 100 to close the opening. The heating plate 200 and the inner liner 100 together form a receiving cavity 110 for containing liquid. The heating plate 200 directly contacts the liquid through its top heat-conducting surface to heat the liquid, resulting in high heating efficiency. The support assembly 300 is located below the inner liner 100 and includes a first support 400 and a second support 500. The bottom of the first support 400 has an opening facing away from the heating plate 200, and a circuit board is embedded in the mounting groove 430. The second support 500 is mounted on the first support 400, and the heat resistance of the second support 500 is higher than that of the first support 400. Specifically, a through hole 410 is provided on the first bracket 400, the through hole 410 extends longitudinally to penetrate the first bracket 400, and the second bracket 500 is inserted into the through hole 410. The second bracket 500 is fixed to the first bracket 400 by snapping with it. At the same time, the second bracket 500 is locked to the heating plate 200 by the locking member 600, so that the first bracket 400 does not directly contact the heating plate 200 after installation, while the second bracket 500 directly contacts the heating plate 200. The second bracket 500 is separated between the first bracket 400 and the locking member 600 to avoid direct contact between the locking member 600 and the first bracket 400.

[0042] This invention configures the bracket assembly 300 for mounting circuit boards as a combination of a first bracket 400 and a second bracket 500. The circuit board is mounted on the first bracket 400, and the second bracket 500 is locked to the heating plate 200 by a locking member 600. This allows the second bracket 500, with its higher heat resistance than the first bracket 400, to act as a separator between the heating plate 200 and the first bracket 400, preventing direct contact between them and thus avoiding rapid heat transfer from the heating plate 200 to the first bracket 400. Simultaneously, the second bracket 500 also functions as a separator between the locking member 600 and the first bracket 400, because it is locked to the heating plate 200... The locking element 600 on the heating plate 200 is usually made of metal, which has strong thermal conductivity. Therefore, the locking element 600 locked on the heating plate 200 will heat up rapidly along with the heating plate 200. At this time, the second bracket 500, which is separated between the first bracket 400 and the locking element 600, not only has high heat resistance, but also forms a barrier to heat transfer between the locking element 600 and the first bracket 400. The setting of the second bracket 500 greatly reduces the heat transferred to the first bracket 400, ensuring that the first bracket 400 is stably installed under the heating plate 200 while preventing the first bracket 400 from overheating and deforming or being damaged. It also protects the first bracket 400 and the circuit board on the first bracket 400. By configuring the second bracket 500 to snap onto the first bracket 400, the assembly of the first bracket 400, the second bracket 500, the heating plate 200, and the locking member 600 during the assembly of the liquid heater can be separated into two assembly steps. In the first step, only the second bracket 500 needs to be snapped onto the first bracket 400 to form the bracket assembly 300. During this process, only the alignment of the first bracket 400 and the second bracket 500 is required. After the assembly of all bracket assemblies 300 is completed in this step, the first bracket 400 and the second bracket 500 participate in the subsequent assembly step as bracket assembly 300 to assemble the bracket assembly 300, the heating plate 200, and the locking member 600. During this process, only the alignment of the second bracket 500 and the heating plate 200 is required, which greatly reduces the assembly difficulty and improves the assembly efficiency.

[0043] In this embodiment, the second support 500 is preferably a heat insulation sleeve 510, such as... Figure 7 As shown, the heat insulation sleeve 510 includes a sleeve body 511, a snap-fit ​​portion 512, and a stop portion 513, as... Figure 4As shown, the sleeve 511 is fitted on the outside of the locking member 600 and passes through the through hole 410 of the first bracket 400 to separate the first bracket 400 and the locking member 600. The snap-fit ​​part 512 and the stop part 513 are integrally provided on the outer side wall of the sleeve 511 and are located on the upper and lower sides of the first bracket 400, respectively. That is, the snap-fit ​​part 512 and the stop part 513 abut against the first bracket 400 at the upper and lower ends of the through hole 410, respectively, to limit the sleeve 511 in the vertical direction, so that the heat insulation sleeve 510 is snapped onto the first bracket 400. During installation, the end of the sleeve 511 with the snap-fit ​​part 512 is inserted into the through hole 410. The snap-fit ​​part 512 and the sleeve 511 deform and enter the through hole 410 until the stop part 513 abuts against the first bracket 400 at one end of the through hole 410. At this time, the snap-fit ​​part 512 and the sleeve 511 pass over the inner wall of the through hole 410 and return to their original positions. The snap-fit ​​part 512 abuts against the first bracket 400 at the other end of the through hole 410. The snap-fit ​​part 512 and the stop part 513, which are integrally formed with the sleeve 511, abut against the first bracket 400 to limit the axial movement of the sleeve 511, so that the sleeve 511 is always fixed between the inner wall of the through hole 410 and the locking member 600. This ensures the separation between the heat insulation sleeve 510 and the first bracket 400 and the locking member 600, which facilitates installation, makes the assembly more stable, and provides good heat insulation.

[0044] The locking element 600 can employ various locking structures to lock and fix the first bracket 400 and the heat insulation sleeve 510. In this embodiment, a locking screw 610 is used as the locking element 600, such as... Figure 4 and Figure 8As shown, the heat insulation sleeve 510 has a mounting hole 5111 that extends through the sleeve body 511 axially. The shank 611 of the locking screw 610 passes through the mounting hole 5111 from bottom to top and extends into the threaded hole 231 on the heating plate 200 to lock it to the heating plate 200 by threads. The head 612 of the locking screw 610 abuts against the end face of the heat insulation sleeve 510 surrounding the mounting hole 5111. The heat insulation sleeve 510 not only separates the shank 611 of the locking screw 610 from the first bracket 400, but also separates the head 612 of the locking screw 610 from the first bracket 400, so that the entire locking screw 610 cannot directly contact the first bracket 400. This ensures that the bracket assembly 300 is stably locked onto the heating plate 200, and at the same time, ensures that the heat transferred from the heating plate 200 to the locking screw 610 cannot be transferred to the first bracket 400 through direct contact. The cross-sectional area of ​​the mounting hole 5111 is larger than that of the screw hole 231. This means that when aligning the mounting hole 5111 of the heat insulation sleeve 510 with the screw hole 231 of the heating plate 200, the mounting hole 5111 does not need to be precisely aligned with the screw hole 231. It is sufficient that the projection of the screw hole 231 on the horizontal plane is entirely within the projection of the mounting hole 5111 on the horizontal plane. This avoids the assembly tolerances of the heat insulation sleeve 510 causing the mounting hole 5111 to be misaligned with the screw hole 231, greatly reducing assembly difficulty. Preferably, the mounting hole 5111 is an oblong hole. Of course, it is understood that in other embodiments, the mounting hole 5111 can also be a round hole with a diameter larger than the screw hole 231 or other irregularly shaped holes.

[0045] like Figure 8As shown, in this embodiment, the stop portion 513 is an annular stop rib 5131. The annular stop rib 5131 surrounds the sleeve body 511 and protrudes from one end of the outer wall of the sleeve body 511. Two notches 5132 are provided on the annular stop rib 5131, which longitudinally penetrate the annular stop rib 5131. The two notches 5132 are respectively located on both sides of the annular stop rib 5131, so that the openings of the two notches 5132 face opposite directions. The notches 5132 can guide and position the heat insulation sleeve 510 during assembly, and can also provide a gripping position for the operator's fingers, making it convenient for the operator to grip and install and remove the heat insulation sleeve 510. To enhance the horizontal limiting effect of the heat insulation sleeve 510, this embodiment provides an annular groove 420 on the first bracket 400. The annular groove 420 surrounds the through hole 410 to accommodate the annular stop rib 5131, which is embedded in the annular groove 420. The annular groove 420 can be formed by a recess on the first bracket 400, or by an annular rib 421 protruding from the end face of the first bracket 400, or by both a recess on the first bracket 400 and an annular rib 421 protruding from the end face of the first bracket 400. The goal is to ensure that the annular stop rib 5131 is entirely located within the annular groove 420, thus preventing the annular stop rib 5131 from being impacted in the horizontal direction.

[0046] In this embodiment, multiple snap-fit ​​portions 512 are provided, and the multiple snap-fit ​​portions 512 are evenly distributed along the circumference of the sleeve 511. The multiple snap-fit ​​portions 512 can enhance the snap-fit ​​strength between the sleeve 511 and the first bracket 400. The evenly spaced multiple snap-fit ​​portions 512 can make the force on the circumference of the sleeve 511 more uniform, and make the connection between the heat insulation sleeve 510 and the first bracket 400 more stable and reliable. In this embodiment, preferably, the snap-fit ​​portion 512 is a snap-fit ​​protrusion protruding from the outer wall of the sleeve 511. The structure is simple, the snap-fit ​​is stable, and it is easy to manufacture. Of course, it can be understood that in another embodiment, the snap-fit ​​portion can also be an elastic snap-fit ​​plate. One end of the elastic snap-fit ​​plate is connected to the sleeve, and the other end is provided with a protrusion that snaps with the first bracket. The elastic snap-fit ​​plate can achieve avoidance and snap-fit ​​through elastic deformation during installation. The structure is simple, the deformation is large, and the sleeve does not need to deform.

[0047] To reduce the installation difficulty of the first bracket 400 and the second bracket 500, this embodiment sets the through hole 410 with a gradually increasing inner diameter, such as... Figure 5 and Figure 6As shown, the inner diameter of the through hole 410 gradually increases from the end away from the annular groove 420 to the end closer to the annular groove 420 along the central axis of the through hole 410. That is, the inner wall of the through hole 410 is inclined toward the side of the first bracket 400 where the annular groove 420 is provided. When installing the heat insulation sleeve 510 on the first bracket 400, because the diameter of the through hole 410 is larger at the end closer to the annular groove 420, the sleeve body 511 does not need to be precisely aligned with the through hole 410 during installation. During the installation process, the inner wall of the through hole 410, which is inclined toward the annular groove 420, can guide the sleeve body 511 and the snap-fit ​​part 512, and can also gradually compress the sleeve body 511 and the snap-fit ​​part 512 so that the sleeve body 511 and the snap-fit ​​part 512 can deform, making the installation easier.

[0048] In this embodiment, as Figure 2 and Figure 3 As shown, the heating plate 200 includes a plate body 210, a heating element 220, and a mounting post 230. The heating element 220 is located at the bottom of the plate body 210, as shown below. Figure 4 As shown, multiple mounting posts 230 (two or more) are provided. The mounting posts 230 are integrally formed on the bottom surface of the disc body 210 and extend downward from the bottom surface of the disc body 210 to abut against the heat insulation sleeve 510. Screw holes 231 are provided on the mounting posts 230 for connection with locking screws 610. The bottom surface of the mounting posts 230 is lower than the bottom surface of the heating element 220, so that a separation gap 240 is formed between the heating element 220 and the first bracket 400. By setting the vertical height of the mounting post 230 to be greater than the vertical height of the heating element 220, when the mounting post 230 abuts against the second bracket 500, the distance between the heating plate 200 and the first bracket 400 is greater than the height of the heating element 220. This allows a heat insulation gap of a certain height to be formed between the heating element 220 mounted on the bottom surface of the heating plate 200 and the first bracket 400. This heat insulation gap separates the heating element 220 and the first bracket 400, preventing the heating element 220 from directly contacting the first bracket 400. This also prevents the heat from the heating element 220 from being transferred to the first bracket 400 through direct contact, thus reducing the amount of heat transferred from the heating element 220 to the first bracket 400.

[0049] In this embodiment, the liquid heater is a heating appliance such as an electric kettle or electric hot water cup used for boiling water or brewing tea.

[0050] Example 2:

[0051] The difference between this embodiment and Embodiment 1 is that, in this embodiment, the inner liner includes an inner liner bottom and an inner liner body. The inner liner body extends upward from the inner liner bottom, so that the inner liner bottom and the inner liner body together form a cavity for containing liquid. The heating plate is installed on the side of the inner liner bottom away from the cavity, so as to heat the liquid in the cavity by heating the inner liner bottom. Since the inner liner bottom and the inner liner body together form the cavity, there is no need to seal the lower part of the cavity, which reduces the difficulty of production and processing.

[0052] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A liquid heater, comprising an inner tank and a heating plate fixed to the bottom of the inner tank, characterized in that: It also includes a support assembly located below the inner liner. The support assembly includes a first support with a circuit board at the bottom and a second support mounted on the first support. The heat resistance of the second support is higher than that of the first support. The first support has a longitudinally extending through hole. The second support passes through the through hole and is snapped onto the first support. The second support is locked to the heating plate by a locking member. The second support is separated between the first support and the locking member.

2. A liquid heater according to claim 1, characterized in that: The second bracket is a heat insulation sleeve, which includes a sleeve body and a snap-fit ​​part and a stop part integrally provided on the outer side wall of the sleeve body. The sleeve body passes through the through hole, and the snap-fit ​​part and the stop part abut against the first bracket at the upper and lower ends of the through hole, respectively, so as to snap the heat insulation sleeve onto the first bracket.

3. A liquid heater according to claim 2, characterized in that: The locking component is a locking screw. The sleeve has a mounting hole. The locking screw passes through the mounting hole and extends into the screw hole on the heating plate to lock with the heating plate. The cross-sectional area of ​​the mounting hole is larger than the cross-sectional area of ​​the screw hole, and the projection of the screw hole on the horizontal plane is entirely within the projection of the mounting hole on the horizontal plane.

4. A liquid heater according to claim 2, characterized in that: The stop portion is an annular stop rib surrounding the sleeve body. The annular stop rib has two longitudinally penetrating notches, which are respectively located on both sides of the annular stop rib, and the openings of the two notches face opposite directions.

5. A liquid heater according to claim 2, characterized in that: The sleeve has multiple locking parts, which are evenly distributed along the circumference of the sleeve. Each locking part is a locking protrusion protruding from the outer wall of the sleeve or an elastic locking plate with one end connected to the sleeve.

6. A liquid heater according to claim 2, characterized in that: The stop portion is an annular stop rib arranged around the sleeve body, and the first bracket is provided with an annular groove arranged around the through hole, and the annular stop rib is embedded in the annular groove.

7. A liquid heater according to claim 6, characterized in that: The inner diameter of the through hole gradually increases along the central axis of the through hole towards the annular groove, so that the inner sidewall of the through hole is inclined toward the annular groove.

8. A liquid heater according to claim 1, characterized in that: The heating plate includes a plate body, a heating element disposed at the bottom of the plate body, and a mounting post extending downward from the bottom of the plate body to connect a locking member. The mounting post abuts against the second bracket, and the bottom surface of the mounting post is lower than the bottom surface of the heating element to form a separation gap between the heating element and the first bracket.

9. A liquid heater according to claim 1 or 8, characterized in that: The bottom of the inner liner has an opening, and the heating plate is fixed to the bottom of the inner liner to close the opening. The heating plate and the inner liner together form a cavity for containing liquid.

10. A liquid heater according to claim 1 or 8, characterized in that: The inner liner includes an inner liner bottom and an inner liner body extending upward from the inner liner bottom. The inner liner bottom and the inner liner body together form a receiving cavity for containing liquid. The heating plate is installed on the side of the inner liner bottom opposite to the receiving cavity.

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