Liquid heating device

Abstract

The embodiment of the utility model provides a liquid heating device which comprises a container body used for containing liquid; the heating piece is used for heating the liquid in the container body; the anti-overflow detection electrodes are arranged at the upper part of the outer side wall of the container body and are distributed in the circumferential direction of the container body; and the anti-overflow detection circuit board is electrically connected with the anti-overflow detection electrode and the heating piece, and the anti-overflow detection circuit board can control the heating power of the heating piece according to the detection result of the anti-overflow detection electrode. According to the liquid heating device provided by the utility model, the height of slurry foam in the container body can be accurately identified, the overflow of the slurry foam is avoided, and the anti-overflow effect is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of cooking utensils, and particularly relates to a liquid heating device. BACKGROUND

[0002] In the liquid heating device in the prior art, as shown in the figure, the capacitive sensing electrode sheet 30a is placed at the position where the handle 60a is attached to the container body 10a, and the capacitive sensing electrode sheet 30a is used for empty space overflow detection. When the liquid level in the container body 10a is close to the capacitive sensing electrode sheet, the capacitive sensing electrode sheet 30a will sense a change in the capacitance value, and the control chip will determine whether there is an overflow signal according to the change in the capacitance value. Figure 1

[0003] However, when the slurry foam 1a formed by bubbles, foam and the like adheres to the inner wall of the container body 10a at different heights, the capacitive sensing electrode sheet 30a at the position of the handle 60a cannot accurately feedback the height of the slurry foam 1a in the container body 10a, and it is likely that the height of the slurry foam 1a is not accurately identified, resulting in overflow of the slurry foam 1a. For example Figure 1 the slurry foam 1a in the figure is higher on the left and lower on the right, and the left slurry foam 1a has reached the water outlet position of the container body 10a, but there is still no slurry foam 1a at the capacitive sensing electrode sheet 30a, which cannot cause a change in the capacitance of the capacitive sensing electrode sheet 30a, and continued heating will cause the slurry foam to overflow. SUMMARY

[0004] Therefore, the purpose of the utility model is to provide a liquid heating device that can accurately identify the height of the slurry foam in the container body, avoid overflow of the slurry foam, and improve the overflow prevention effect.

[0005] An embodiment of the utility model provides a liquid heating device, which comprises a container body for containing liquid, a heating element for heating the liquid in the container body, an overflow detection electrode arranged at the upper part of the outer side wall of the container body and distributed circumferentially around the container body, and an overflow detection circuit board electrically connected with the overflow detection electrode and the heating element, wherein the overflow detection circuit board can control the heating power of the heating element according to the detection result of the overflow detection electrode.

[0006] ​The liquid heating device provided by the embodiments of the present aspect can realize full-enclosing anti-overflow by arranging the anti-overflow detection electrodes on the upper part of the outer sidewall of the container body. When the liquid in the container body boils, the pulp foam will climb upward along the inner sidewall of the container body in any direction to the position close to the anti-overflow height, which can cause the capacitance value of the anti-overflow detection electrode to change, so that the anti-overflow detection circuit board can identify the anti-overflow signal, and the anti-overflow detection circuit board can adjust the heating power of the heating element in time, for example, reduce the heating power or stop the heating of the heating element, so as to improve the anti-overflow effect.

[0007] Further, in some embodiments, the anti-overflow detection electrode is a ring-shaped metal hoop, which is sleeved on the outer periphery of the container body.

[0008] In these embodiments, the anti-overflow detection electrode is a metal hoop, which is convenient to install. Moreover, the metal hoop can closely fit the outer sidewall of the container body, so that the sensing sensitivity of the anti-overflow detection electrode can be improved.

[0009] Further, in some embodiments, the outer sidewall of the container body is provided with circumferentially distributed mounting grooves, and the anti-overflow detection electrode is embedded in the mounting grooves. The design of the mounting grooves can limit the anti-overflow detection electrode, so as to prevent the anti-overflow detection electrode from sliding off the container body. Moreover, the anti-overflow detection electrode embedded in the mounting grooves can reduce the probability of being scratched by other things around, reduce the probability of being touched by the user, and improve the safety.

[0010] Further, in some embodiments, the liquid heating device can further include a shielding cover, which is sleeved on the outer sidewall of the container body and covers the outer side of the anti-overflow detection electrode. The shielding cover can block the anti-overflow detection electrode from contacting the outside world, prevent the user from touching the anti-overflow detection electrode, and improve the safety of product use.

[0011] Further, in some embodiments, the width of the anti-overflow detection electrode is greater than or equal to 5 mm. This is beneficial to ensure the accuracy and reliability of the capacitance sensing of the anti-overflow detection electrode. This can avoid the anti-overflow detection electrode being too narrow to accurately sense the pulp foam.

[0012] Further, in some embodiments, the liquid heating device further includes a handle provided on the outer sidewall of the container body, and the upper part of the side of the handle facing the container body is provided with a mounting hole; the anti-overflow detection electrode is arranged on the container body at a position corresponding to the mounting hole, and the anti-overflow detection circuit board is arranged in the interior of the handle, and the anti-overflow detection electrode is electrically connected to the anti-overflow detection circuit board through the mounting hole.

[0013] In the embodiments, the anti-overflow detection electrode is arranged at the height of the handle, facilitating the electrical connection of the anti-overflow detection electrode with the anti-overflow detection circuit board in the handle through the mounting hole on the handle, and hiding the lead wire between the anti-overflow detection electrode and the anti-overflow detection circuit board in the handle, thus achieving compact structure and good appearance effect. Moreover, arranging the anti-overflow detection circuit board in the handle can shorten the length of the lead wire between the anti-overflow detection electrode and the anti-overflow detection circuit board, reduce the environmental interference on the lead wire, and help the change in capacitance generated by the anti-overflow detection electrode to keep its original characteristics to be transmitted to the anti-overflow detection circuit board, thus improving the anti-overflow detection accuracy.

[0014] Further, in some embodiments, a threaded column is arranged at the position opposite to the mounting hole of the anti-overflow detection electrode, and the liquid heating device further comprises: a terminal arranged in the interior of the handle, the terminal being provided with a first through hole; a fastening screw, the fastening screw passing through the first through hole and the mounting hole and being inserted into the threaded column; and a first lead wire, one end of the first lead wire being connected with the terminal, and the other end of the first lead wire being connected with the anti-overflow detection circuit board.

[0015] In the embodiments, the fastening screw passes through the first through hole on the terminal, the mounting hole on the handle, and is inserted into the threaded column on the anti-overflow detection electrode, which can fix the terminal and help the electrical signal to be transmitted to the terminal through the threaded column and the fastening screw, and then transmitted to the anti-overflow detection circuit board through the first lead wire connected with the terminal, so that the anti-overflow detection circuit board can obtain the anti-overflow signal for anti-overflow.

[0016] Further, in some embodiments, the anti-overflow detection electrode is bent to form a ring shape, and the two ends of the anti-overflow detection electrode are overlapped together to form a connecting end, and the threaded column is arranged on the connecting end, and the fastening screw is inserted into the connecting end through the threaded column.

[0017] In the embodiments, the two ends of the anti-overflow detection electrode are overlapped together to form a connecting end, the threaded column is arranged on the connecting end, and the fastening screw is inserted into the connecting end through the threaded column, so that the fastening screw can not only transmit the electrical signal, but also fix the two ends of the anti-overflow detection electrode, preventing the two ends of the anti-overflow detection electrode from being separated from each other and ensuring the anti-overflow detection electrode to keep the ring shape. Without additional connectors to connect the two ends of the anti-overflow detection electrode, the number of parts can be reduced and the cost can be saved.

[0018] Further, in some embodiments, the liquid heating device further comprises: an elastic gasket sleeved on the fastening screw and clamped between the terminal and the nut of the fastening screw. The elastic gasket can prevent the fastening screw from scratching the terminal, and can also help to keep the terminal, the fastening screw and the threaded column in tension, thereby ensuring the effectiveness of the electrical signal transmission.

[0019] Further, in some embodiments, the anti-overflow detection electrode is electrically connected to the anti-overflow detection circuit board through a first lead wire, and the length of the first lead wire is less than or equal to 150 mm.

[0020] The first lead wire is susceptible to environmental interference. If the first lead wire is too long, the capacitance change of the anti-overflow detection electrode may be changed and transmitted to the anti-overflow detection circuit board, resulting in that the anti-overflow detection circuit board cannot accurately obtain the anti-overflow signal. Therefore, in these embodiments, the length of the first lead wire is less than or equal to 150 mm, so that the capacitance change of the anti-overflow detection electrode can be transmitted to the anti-overflow detection circuit board with its original characteristics, thereby improving the accuracy of anti-overflow detection.

[0021] Further, in some embodiments, the liquid heating device further comprises: a bottom cover arranged at the bottom of the container body and surrounding a mounting cavity with the bottom wall of the container body, the heating element is arranged in the mounting cavity, the anti-overflow detection circuit board is connected to one end of a second lead wire, and the other end of the second lead wire extends into the mounting cavity and is electrically connected to the heating element and the power supply. The anti-overflow detection circuit board is powered and controlled to control the heating power of the heating element.

[0022] Further aspects and / or advantages of the present general inventive concept will be described in part below with reference to the following description and drawings. Further aspects and advantages will become apparent from the description and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0023] The above and other objects and features of the present application will become more apparent from the following description of embodiments taken in conjunction with the accompanying drawings, in which:

[0024] Figure 1 A longitudinal sectional view of a liquid heating device in the related art is shown;

[0025] Figure 2 A longitudinal sectional view of a liquid heating device of one embodiment of the present application is shown;

[0026] Figure 3 Another longitudinal sectional view of a liquid heating device of one embodiment of the present application is shown;

[0027] Figure 4 A longitudinal sectional view of a liquid heating device in the related art is shown; Figure 3 A partial enlarged view of I in FIG.

[0028] Figure 5 An exploded schematic view of a liquid heating device of one embodiment of the present application is shown.

[0029] Figure 6 A structural schematic view of an anti-overflow detection electrode and an anti-overflow detection circuit board of one embodiment of the present application is shown.

[0030] Figure 1 BRIEF DESCRIPTION OF DRAWINGS

[0031] 1a slurry foam; 10a container body; 30a capacitive induction electrode sheet; 60a handle.

[0032] Figures 2 to 6 BRIEF DESCRIPTION OF DRAWINGS

[0033] 1 slurry foam;

[0034] 10 container body; 110 mounting groove;

[0035] 20 heating element;

[0036] 30 anti-overflow detection electrode; 310 connection end; 320 threaded column;

[0037] 40 anti-overflow detection circuit board;

[0038] 510 wiring terminal; 520 elastic gasket; 530 fastening screw; 540 first lead wire; 550 detection circuit board housing; 560 second lead wire;

[0039] 60 handle; 610 handle main body; 611 mounting hole; 620 handle cover; 630 silicone gasket;

[0040] 70 bottom cover; 710 mounting cavity;

[0041] 80 temperature controller;

[0042] 90 temperature sensor support. DETAILED DESCRIPTION

[0043] The following detailed description is provided to help the reader understand the method, device and / or system described herein. However, various changes, modifications and equivalents can be resorted to by those skilled in the art after understanding the disclosure of the present application. For example, the order of the operations described herein is merely an example, and is not limited to those set forth herein, but can be changed as will be apparent after understanding the disclosure of the present application, except for operations that must occur in a specific order. Also, the description of features known in the art can be omitted for the sake of clarity and conciseness.

[0044] The features described herein can be implemented in different ways depending upon the particular application. Rather than be bound by the examples described herein, the examples described herein are provided to illustrate some of the many possible ways of implementing the methods, devices, and / or systems described herein, which will become apparent to those of skill in the art upon review of the disclosure.

[0045] As used herein, the term "and / or" includes any one of the associated listed items, as well as any combination of any two or more of the associated listed items.

[0046] Although terms such as "first", "second", and "third" can be used herein to describe various elements, components, regions, layers or sections, these elements, components, regions, layers or sections should not be limited by these terms. Rather, these terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, the first element, the first component, the first region, the first layer or the first section referred to in the examples described herein can also be referred to as the second element, the second component, the second region, the second layer or the second section without departing from the teachings of the examples.

[0047] In the specification, when an element such as a layer, a region, or a substrate is referred to as "on" another element, "connected to" or "coupled to" another element, it can be "directly on" the other element, "directly connected to" or "directly coupled to" the other element, or one or more other elements can be interposed therebetween. In contrast, when an element is referred to as being "directly on" another element, "directly connected to" or "directly coupled to" another element, there are no other elements interposed therebetween.

[0048] The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of the disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has", "having" as used herein, specify the presence of stated features, numbers, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, numbers, operations, components, elements, and / or combinations thereof. The term "plurality" represents any number of two or more.

[0049] In the present application, the orientation of the terms such as "upper" and "bottom" is defined based on the orientation of the product in the normal use state, unless otherwise specified.

[0050] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs when read in light of the entire disclosure of this application. Terms such as, for example, "a", "an", and "the" should be construed to be inclusive, unless otherwise indicated by context or by expressly stating otherwise. The use of any and all examples or exemplary language (e.g., "such as", "for example", "e.g.", "for instance", "like", and "just to name a few") is intended merely to better illuminate the application and does not indicate any limitation on the scope of the application unless otherwise indicated by context or by expressly stating otherwise.

[0051] The application will be described below with reference to the drawings. Figures 2 to 6 The liquid heating device provided by the embodiment of the application is introduced.

[0052] As shown in Figure 2 , Figure 5 and Figure 6 , an aspect of the embodiment of the application provides a liquid heating device, which comprises: a container body 10 for containing liquid; a heating element 20 for heating the liquid in the container body 10; an anti-overflow detection electrode 30 arranged at the upper part of the outer side wall of the container body 10 and distributed circumferentially around the container body 10; and an anti-overflow detection circuit board 40 electrically connected with the anti-overflow detection electrode 30 and the heating element 20 respectively, wherein the anti-overflow detection circuit board 40 can control the heating power of the heating element 20 according to the detection result of the anti-overflow detection electrode 30.

[0053] The liquid heating device provided by the embodiment of the application can realize full-enclosing anti-overflow through the circumferential distribution of the anti-overflow detection electrode 30 at the upper part of the outer side wall of the container body 10. When the liquid in the container body 10 boils, the slurry foam 1 climbs up to the position close to the anti-overflow height in any direction along the inner side wall of the container body 10, which can cause the change of the capacitance value of the anti-overflow detection electrode 30, so that the anti-overflow detection circuit board 40 can recognize the anti-overflow signal, which is beneficial to the timely adjustment of the heating power of the heating element 20 by the anti-overflow detection circuit board 40, such as reducing the heating power or stopping the heating of the heating element 20, and improves the anti-overflow effect.

[0054] Figure 2 In the figure, the small circle bubbles in the container body 10 represent the slurry foam 1, which is not a solid structure, Figure 2 In the figure, the oblique lines in the container body 10 represent the different climbing heights of the slurry foam 1 at different positions. If the slurry foam 1 climbs up along the inner side wall of the container body 10 in the form of left high and right low, Figure 2 In the figure, the oblique lines in the container body 10 represent the different climbing heights of the slurry foam 1 at different positions. If the slurry foam 1 climbs up along the inner side wall of the container body 10 in the form of left high and right low, Figure 1The left-side slurry foam 1a has reached the water outlet nozzle position, while the right-side capacitive sensing electrode sheet 30a is still unable to sense the slurry foam 1a, so the heating power of the heating element 20 can be adjusted in time to improve the anti-overflow effect.

[0055] In specific applications, the anti-overflow detection circuit board 40 can have a control chip, and the anti-overflow detection electrode 30 is electrically connected to the control chip.

[0056] Further, in some embodiments, as shown in Figure 5 and Figure 6 , the anti-overflow detection electrode 30 is a ring-shaped metal hoop that is sleeved on the outer side wall of the container body 10.

[0057] In these embodiments, the anti-overflow detection electrode 30 is a metal hoop, which is easy to install. Moreover, the metal hoop can closely fit the outer side wall of the container body 10, which can improve the sensing sensitivity of the anti-overflow detection electrode 30.

[0058] Further, in some embodiments, as shown in Figure 5 and Figure 6 , the outer side wall of the container body 10 is provided with circumferentially distributed mounting grooves 110, and the anti-overflow detection electrode 30 is embedded in the mounting grooves 110. The design of the mounting grooves 110 can position the anti-overflow detection electrode 30 and prevent it from sliding off the container body 10. Moreover, the embedding of the anti-overflow detection electrode 30 in the mounting grooves 110 can reduce the probability of the anti-overflow detection electrode 30 being scratched by other surrounding objects and the probability of the user touching the anti-overflow detection electrode 30, thereby improving safety.

[0059] Further, in some embodiments, the liquid heating device can further include a shielding cover (not shown in the figure) that is sleeved on the outer side wall of the container body 10 and covers the outer side of the anti-overflow detection electrode 30. The shielding cover can block the anti-overflow detection electrode 30 from contacting the outside world, thereby preventing the user from touching the anti-overflow detection electrode 30 and improving the safety of product use.

[0060] Further, in some embodiments, as shown in Figure 6 , the width W of the anti-overflow detection electrode 30 is greater than or equal to 5 mm. This is beneficial to ensuring the accuracy and reliability of the capacitive sensing of the anti-overflow detection electrode 30. It avoids the anti-overflow detection electrode 30 being too narrow to accurately sense the slurry foam 1.

[0061] In specific applications, the width W of the anti-overflow detection electrode 30 is 5 mm, 8 mm, or 10 mm.

[0062] Further, in some embodiments, as shown in Figures 3 to 5As shown, the liquid heating device also includes: a handle 60, which is disposed on the outer wall of the container body 10, and a mounting hole 611 is provided on the upper part of the side of the handle 60 facing the container body 10; an anti-overflow detection electrode 30 is disposed on the container body 10 corresponding to the position of the mounting hole 611; an anti-overflow detection circuit board 40 is disposed inside the handle 60; and the anti-overflow detection electrode 30 is electrically connected to the anti-overflow detection circuit board 40 through the mounting hole 611.

[0063] In these embodiments, the spill detection electrode 30 is positioned at the height of the handle 60, facilitating its electrical connection with the spill detection circuit board 40 inside the handle 60 via the mounting hole 611. This also allows the lead wire between the spill detection electrode 30 and the spill detection circuit board 40 to be concealed within the handle 60, resulting in a compact structure and improved appearance. Furthermore, placing the spill detection circuit board 40 inside the handle 60, compared to placing it below the container body 10, shortens the length of the lead wire between the spill detection electrode 30 and the circuit board 40, reducing environmental interference and ensuring that the capacitance change generated by the spill detection electrode 30 is transmitted to the spill detection circuit board 40 with its original characteristics, thus improving the accuracy of spill detection.

[0064] As an example, such as Figures 3 to 5 As shown, the handle 60 includes a handle body 610 and a handle cover 620. The handle body 610 is disposed on the outer side wall of the container body 10, and the mounting hole 611 is disposed on the handle body 610. The handle cover 620 is disposed on the side of the handle body 610 away from the container body 10.

[0065] There is a detection circuit board housing 550 between the handle body 610 and the handle cover 620, and the spill-proof detection circuit board 40 is disposed inside the detection circuit board housing 550.

[0066] The handle 60 also includes a silicone pad 630. The top of the handle body 610 is bent into the inside of the container body 10 to form a edging structure. The silicone pad 630 is sandwiched between the top of the container body 10 and the edging structure.

[0067] Furthermore, in some embodiments, such as Figures 3 to 5 As shown, a threaded post 320 is provided at the position opposite to the mounting hole 611 of the anti-overflow detection electrode 30. The liquid heating device also includes: a terminal block 510, which is provided inside the handle 60, and a first through hole is provided on the terminal block 510; a fastening screw 530, which passes through the first through hole and the mounting hole 611 and is inserted into the threaded post 320; and a first lead wire 540, one end of which is connected to the terminal block 510, and the other end of which is connected to the anti-overflow detection circuit board 40.

[0068] In these embodiments, the fastening screw 530 is inserted into the threaded column 320 on the anti-overflow detection electrode 30 through the first through hole on the terminal 510 and the mounting hole 611 on the handle 60 in sequence, which can fix the terminal 510 on one hand and facilitate the transmission of the electrical signal to the terminal 510 through the threaded column 320 and the fastening screw 530, and then to the anti-overflow detection circuit board 40 through the first lead wire 540 connected with the terminal 510, so that the anti-overflow detection circuit board 40 can obtain the anti-overflow signal for anti-overflow.

[0069] Further, in some embodiments, as shown in Figure 5 and Figure 6 , the anti-overflow detection electrode 30 is bent to form a ring shape, and the two ends of the anti-overflow detection electrode 30 are overlapped to form a connecting end 310, and the threaded column 320 is arranged on the connecting end 310, and the fastening screw 530 is inserted into the connecting end 310 through the threaded column 320.

[0070] In these embodiments, the two ends of the anti-overflow detection electrode 30 are overlapped to form a connecting end 310, the threaded column 320 is arranged on the connecting end 310, and the fastening screw 530 is inserted into the connecting end 310 through the threaded column 320, so that the fastening screw 530 not only plays a role in transmitting the electrical signal, but also plays a role in fixing the two ends of the anti-overflow detection electrode 30, preventing the two ends of the anti-overflow detection electrode 30 from separating from each other, and ensuring that the anti-overflow detection electrode 30 remains in a ring shape. Without the need for additional connectors to connect the two ends of the anti-overflow detection electrode 30, the number of parts can be reduced, and costs can be saved.

[0071] Of course, in other embodiments, the two ends of the anti-overflow detection electrode 30 can also be connected together by an additional connector (not shown in the figure) or welded together to keep the anti-overflow detection electrode 30 in a ring shape. In this case, the threaded column 320 can not be arranged at the two ends of the anti-overflow detection electrode 30 connected together, but can be arranged at any position in the circumferential direction of the anti-overflow detection electrode 30 as long as it is distributed opposite to the mounting hole 611 on the handle 60 after installation.

[0072] Further, in some embodiments, as shown in Figure 4 and Figure 5 , the liquid heating device further comprises an elastic gasket 520, which is sleeved on the fastening screw 530 and clamped between the terminal 510 and the nut of the fastening screw 530. The design of the elastic gasket 520 can prevent the fastening screw 530 from scratching the terminal 510 on one hand, and facilitate the terminal 510, the fastening screw 530 and the threaded column 320 to remain in a tensioned state on the other hand, ensuring the effectiveness of the electrical signal transmission.

[0073] As an example, the elastic gasket 520 is a silica gel gasket.

[0074] Further, in some embodiments, the anti-overflow detection electrode 30 is electrically connected to the anti-overflow detection circuit board 40 through a first lead wire 540, and the length of the first lead wire 540 is less than or equal to 150 mm.

[0075] The first lead wire 540 is susceptible to environmental interference. If the first lead wire 540 is too long, the amount of change in the capacitance generated by the anti-overflow detection electrode 30 may change when transmitted to the anti-overflow detection circuit board 40, resulting in the anti-overflow detection circuit board 40 being unable to accurately obtain the anti-overflow signal. Therefore, in these embodiments, the length of the first lead wire 540 is less than or equal to 150 mm, so that the amount of change in the capacitance generated by the anti-overflow detection electrode 30 can be transmitted to the anti-overflow detection circuit board 40 while maintaining its original characteristics, thereby improving the accuracy of anti-overflow detection.

[0076] In specific applications, the length of the first lead wire 540 is 100 mm, 120 mm, or 140 mm.

[0077] Further, in some embodiments, as shown in Figure 3 and Figure 5 , the liquid heating device further comprises a bottom cover 70 arranged at the bottom of the container body 10 and surrounding a mounting cavity 710 with the bottom wall of the container body 10, the heating element 20 is arranged in the mounting cavity 710, the anti-overflow detection circuit board 40 is connected to one end of a second lead wire 560, and the other end of the second lead wire 560 extends into the mounting cavity 710 and is electrically connected to the heating element 20 and the power supply. This facilitates the power supply for the anti-overflow detection circuit board 40 and also facilitates the control of the heating power of the heating element 20 by the anti-overflow detection circuit board 40.

[0078] As an example, the heating element 20 is a heating disc arranged at the bottom of the container body 10.

[0079] As an example, the liquid heating device further comprises a control circuit board arranged in the mounting cavity 710, the anti-overflow detection circuit board 40 is connected to the control circuit board through the second lead wire 560, and the control circuit board is electrically connected to the heating element 20. The anti-overflow detection circuit board 40 can control the heating power of the heating element 20 through the control circuit board.

[0080] Further, in some embodiments, as shown in Figure 3 and Figure 5 , the liquid heating device further comprises a temperature controller 80, a temperature sensor holder 90, and a temperature sensor (not shown in the figure) arranged on the temperature sensor holder 90. The temperature controller 80 and the temperature sensor holder 90 are both arranged in the mounting cavity 710, and the temperature controller 80 and the temperature sensor are both electrically connected to the heating element 20.

[0081] Further, in some embodiments, the liquid heating device is an electric kettle, a health pot or a tea pot, etc.

[0082] Although the embodiments of the present application have been described in detail above, various modifications and changes can be made to the embodiments of the present application by those skilled in the art without departing from the spirit and scope of the present application. It should be understood that these modifications and changes will still fall within the spirit and scope of the embodiments of the present application defined in the claims.

Claims

1. A liquid heating apparatus, characterised in that, The liquid heating device comprises: a container body (10) for containing liquid; a heating element (20) for heating the liquid in the container body (10); an anti-overflow detection electrode (30) arranged at the upper portion of the outer sidewall of the container body (10) and distributed circumferentially around the container body (10); an anti-overflow detection circuit board (40) electrically connected with the anti-overflow detection electrode (30) and the heating element (20) respectively, and capable of controlling the heating power of the heating element (20) according to the detection result of the anti-overflow detection electrode (30).

2. The liquid heating device of claim 1, wherein, The anti-overflow detection electrode (30) is a ring-shaped metal hoop sleeved on the outer periphery of the container body (10).

3. The liquid heating device of claim 1, wherein, The outer sidewall of the container body (10) is provided with circumferentially distributed mounting grooves (110), and the anti-overflow detection electrode (30) is embedded in the mounting grooves (110); and / or The liquid heating device further comprises a shielding cover sleeved on the outer sidewall of the container body (10) and covering the outer side of the anti-overflow detection electrode (30).

4. The liquid heating device of claim 1, wherein, The width of the anti-overflow detection electrode (30) is greater than or equal to 5 mm.

5. The liquid heating device of any one of claims 1 to 4, wherein, The liquid heating device further comprises: a handle (60) arranged on the outer sidewall of the container body (10), and the upper portion of the side of the handle (60) facing the container body (10) is provided with a mounting hole (611); The anti-overflow detection electrode (30) is arranged on the container body (10) corresponding to the position of the mounting hole (611), the anti-overflow detection circuit board (40) is arranged inside the handle (60), and the anti-overflow detection electrode (30) is electrically connected with the anti-overflow detection circuit board (40) through the mounting hole (611).

6. The liquid heating device of claim 5, wherein, The anti-overflow detection electrode (30) is provided with a threaded column (320) at the position opposite to the mounting hole (611), and the liquid heating device further comprises: a wiring terminal (510) arranged inside the handle (60), and the wiring terminal (510) is provided with a first through hole; a fastening screw (530) passing through the first through hole and the mounting hole (611) and inserted into the threaded column (320); a first lead wire (540) having one end connected with the wiring terminal (510) and the other end connected with the anti-overflow detection circuit board (40).

7. The liquid heating device of claim 6, wherein, The anti-overflow detection electrode (30) is bent to form a ring shape, and the two ends of the anti-overflow detection electrode (30) are overlapped together to form a connecting end (310), and the threaded column (320) is arranged on the connecting end (310), and the fastening screw (530) is inserted into the connecting end (310) through the threaded column (320).

8. The liquid heating device of claim 6, wherein, The liquid heating device further comprises: a resilient gasket (520) sleeved on the fastening screw (530) and clamped between the wiring terminal (510) and the nut of the fastening screw (530).

9. The liquid heating device of any one of claims 1-4, wherein, The anti-overflow detection electrode (30) is electrically connected with the anti-overflow detection circuit board (40) through a first lead wire (540), and the length of the first lead wire (540) is less than or equal to 150 mm.

10. The liquid heating device of any one of claims 1-4, wherein, The liquid heating device further comprises: A bottom cover (70) is arranged at the bottom of the container body (10) and surrounds a mounting cavity (710) with the bottom wall of the container body (10), and the heating element (20) is arranged in the mounting cavity (710), The anti-overflow detection circuit board (40) is connected with one end of a second lead wire (560), and the other end of the second lead wire (560) extends into the mounting cavity (710) and is electrically connected with the heating element (20) and the power supply.

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