Dry burning prevention device of double-layer electric kettle

Abstract

The utility model relates to the technical field of electric kettles, in particular to an anti-dry-burning device of a double-layer electric kettle, which comprises a power supply base and a double-layer kettle body, a power supply head is arranged in the middle of the top of the power supply base, a butt joint port matched with the power supply head is arranged in the middle of the bottom of the double-layer kettle body, and four pressure sensors are embedded in the top of the power supply base. Four circular fixing blocks are arranged at the bottom of the double-layer kettle body, the bottoms of the four circular fixing blocks abut against the detection faces of the four pressure sensors correspondingly, four rectangular mounting grooves are formed in the top of the power supply base, electric telescopic rods are arranged in the four rectangular mounting grooves correspondingly, and movable rods of the four electric telescopic rods are jointly connected with a supporting disc. According to the dry-burning-resistant device of the double-layer electric kettle, the weight change of the kettle body is detected in real time through the pressure sensor, when the weight difference value reaches a preset threshold value due to water evaporation, the controller automatically triggers the electric telescopic rod to act, the supporting disc is pushed to lift the kettle body, the power supply head is separated from the butt joint port, and rapid power failure, accuracy and reliability are achieved.

Description

Technical Field

[0001] This utility model relates to the field of electric kettle technology, specifically to an anti-dry-boil device for a double-walled electric kettle. Background Technology

[0002] Double-walled electric kettles are a new type of electric water heater designed to improve water heating efficiency and heat retention. Unlike traditional single-walled kettles, double-walled kettles use a double-layer structure, typically consisting of an inner liner and an outer shell. The inner liner heats the water, while the outer shell provides insulation and prevents scalding. This design effectively reduces heat loss, better maintains water temperature, and achieves energy savings. Furthermore, the outer layer of a double-walled kettle maintains a relatively lower temperature during heating, reducing the risk of accidental scalding and improving safety during use.

[0003] Patent CN220859891U discloses a double-layer electric kettle. This double-layer electric kettle includes a power supply base, on which a kettle body is movably mounted. The kettle body includes a heating element electrically connected to the power supply base. The top of the heating element is a body portion, and the top of the body portion is a spout. A spout component is provided at the spout, and the spout component has a double-layer structure. This utility model provides a double-layer electric kettle with the advantages of a double-layer spout structure, heat preservation, and energy saving.

[0004] While existing double-walled electric kettles offer good heat retention and energy efficiency, a significant safety hazard remains in practical use: the lack of an anti-dry-boil function. Especially if the user accidentally heats the water until it completely evaporates or forgets to add water, the kettle may remain in a continuous heating state. This can lead to overheating and burnout, and potentially even fires or other serious accidents. Therefore, there is an urgent need for an effective anti-dry-boil device that automatically cuts off the power when the water level is too low, preventing dry-boil. Based on this background, we propose an anti-dry-boil device for double-walled electric kettles. This device can monitor the boiling status of the kettle in real time, ensuring timely power cut-off when the water boils, thus improving user safety. Utility Model Content

[0005] The purpose of this invention is to provide an anti-dry-boil device for a double-walled electric kettle to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] The anti-dry-boil device for a double-walled electric kettle includes a power supply base and a double-walled kettle body. The double-walled kettle body consists of an inner liner and an outer shell. The inner liner is used to heat water, while the outer shell serves to insulate against heat and prevent scalding. This is existing technology and will not be described in detail here. The power supply base has a power supply head in the middle of its top, and the double-walled kettle body has a matching interface in the middle of its bottom. When boiling water is required, the power supply head is inserted into the matching interface to supply power to the heating element at the bottom of the double-walled kettle body.

[0008] The top of the power supply base is embedded with four pressure sensors arranged in a matrix, and the bottom of the double-layer kettle body is provided with four circular blocks. The bottom of the four circular blocks abuts against the detection surfaces of the four pressure sensors, and the four pressure sensors together detect the overall weight of the double-layer kettle body.

[0009] The power supply base has four rectangular mounting slots arranged in a matrix on its top. Each of the four rectangular mounting slots contains an electric telescopic rod. A controller is located inside the power supply base, with its control panel located on the outer wall of the base. Pressure sensors and electric telescopic rods are electrically connected to the controller via wires. The movable rods of the four electric telescopic rods are connected to a support plate. When boiling water, a double-walled kettle filled with water is placed on the power supply base. The four pressure sensors detect the total weight of the double-walled kettle with water as 'a'. After the water boils, if boiling continues, the total weight of the double-walled kettle filled with water gradually decreases. The total weight of the double-walled kettle after the water evaporates is 'b'. Each time... When boiling water, the pressure sensor automatically detects the original total weight 'a'. The user can set a fixed weight difference value 'c'. When the total weight difference of the double-walled kettle containing water reaches the difference threshold set by the pressure sensor (ab = c), the controller activates the four electric telescopic rods. The movable rods of the four electric telescopic rods extend, pushing the support plate upward. The support plate supports the double-walled kettle, pushing it upward and separating the kettle's interface from the power supply head of the power base, thus achieving power-off operation and preventing dry burning. After the user removes the double-walled kettle, the movable rods of the electric telescopic rods can be reset and retracted through the control panel to avoid affecting the next boiling.

[0010] Preferably, when the movable rod of the electric telescopic rod is fully retracted, the bottom of the support plate is in contact with the top of the power supply base, and the top of the support plate is 2-4mm away from the bottom of the double-layer kettle body, so as to avoid the support plate affecting the pressure sensor's detection of the weight of the double-layer kettle body.

[0011] Preferably, the bottom of the support plate is provided with four circular sleeves, and the ends of the four movable rods of the electric telescopic rod are respectively inserted into the four circular sleeves, which facilitates the connection between the support plate and the electric telescopic rod.

[0012] Preferably, a circular hole a is provided in the middle of the top of the support plate for the power supply head to pass through. The inner diameter of the circular hole a is larger than the maximum outer diameter of the power supply head to avoid friction.

[0013] Preferably, the top of the support plate has four circular holes b arranged in a matrix, and the four circular blocks pass through the four circular holes b respectively.

[0014] Preferably, the inner diameter of the circular hole b is larger than the outer diameter of the circular solid block, so as not to hinder the movement of the circular solid block and avoid affecting the accuracy of the pressure sensor detection. The top of the inner wall of the circular hole b is provided with a beveled surface, which is conducive to the circular solid block passing through the circular hole b.

[0015] Preferably, the bottom of the power supply base is provided with a plurality of rubber pads arranged in a circular array, and the rubber pads are adhered to the bottom of the power supply base to improve the stability of the power supply base.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. The anti-dry-boil device of this double-walled electric kettle uses a pressure sensor to detect changes in the weight of the kettle body in real time. When the weight difference caused by water evaporation reaches a preset threshold, the controller automatically triggers the electric telescopic rod to push the support plate to lift the kettle body, thereby separating the power supply head from the interface and achieving rapid power cut-off, which is accurate and reliable.

[0018] 2. The anti-dry-boil device of this double-walled electric kettle has a pressure sensor with a weight difference threshold that can be adjusted by the user according to actual needs. It is suitable for different water volume scenarios and can also adapt to the error caused by the slight change in the weight of the kettle body during long-term use, thus improving the adaptability and flexibility of the device. At the same time, the power-off action is achieved by mechanical lifting to physically separate the parts, completely cutting off the power supply and avoiding the failure risk that may exist if only relying on the circuit switch.

[0019] 3. The anti-dry-boil device of this double-walled electric kettle has a support plate and an electric telescopic rod that are fixed by a circular sleeve to ensure the stability and synchronization of the lifting action. The size design of the circular holes a and b, as well as the beveled structure, not only avoid friction or jamming when the support plate contacts the bottom of the kettle, but also ensure the accuracy of the pressure sensor detection. In addition, the support plate maintains a 2-4mm gap with the bottom of the kettle when it is retracted, which does not affect the weight detection.

[0020] 4. The anti-dry-boil device of this double-walled electric kettle retains the original heat preservation and energy-saving advantages of the double-walled kettle body. It achieves the anti-dry-boil function through an external pressure detection and lifting mechanism. It does not require complex modifications to the inner liner or heating structure of the kettle, which reduces production costs and makes it easy to promote and upgrade to the existing product line. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is one of the partial structural schematic diagrams of this utility model;

[0023] Figure 3 This is a schematic diagram of the double-layered kettle body structure in this utility model;

[0024] Figure 4 This is a schematic diagram of the assembly structure of the power supply base and support plate in this utility model;

[0025] Figure 5 This is the second partial structural schematic diagram of the present utility model;

[0026] Figure 6 This is a schematic diagram of the assembly structure of the power supply base, pressure sensor, and electric telescopic rod in this utility model;

[0027] Figure 7 This is a schematic diagram of the support disk structure in this utility model;

[0028] In the diagram: 1. Power supply base; 10. Power supply head; 11. Rectangular mounting slot; 2. Double-layer kettle body; 20. Connecting interface; 21. Circular fixed block; 3. Pressure sensor; 4. Electric telescopic rod; 5. Support plate; 50. Circular hole a; 51. Circular hole b; 52. Circular sleeve; 53. Beveled surface; 6. Rubber pad. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] 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", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component 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 utility model.

[0031] Please see Figures 1-7 This utility model provides a technical solution:

[0032] The anti-dry-boil device for a double-walled electric kettle includes a power supply base 1 and a double-walled kettle body 2. The double-walled kettle body 2 consists of an inner liner and an outer shell. The inner liner is used to heat water, while the outer shell serves to insulate against heat and prevent scalding. This is existing technology and will not be described in detail here. The power supply base 1 has a power supply head 10 at the top center, and the double-walled kettle body 2 has a matching interface 20 at the bottom center that is compatible with the power supply head 10. When boiling water is required, the power supply head 10 is inserted into the matching interface 20 to supply power to the heating element at the bottom of the double-walled kettle body 2.

[0033] The top of the power supply base 1 is embedded with four pressure sensors 3 arranged in a matrix, and the bottom of the double-layer kettle body 2 is provided with four circular blocks 21. The bottom of the four circular blocks 21 respectively abuts against the detection surface of the four pressure sensors 3, and the four pressure sensors 3 together detect the overall weight of the double-layer kettle body 2.

[0034] The top of the power supply base 1 has four rectangular mounting slots 11 arranged in a matrix. Each of the four rectangular mounting slots 11 contains an electric telescopic rod 4. A controller is located inside the power supply base 1, with its control panel located on the outer wall of the base. Pressure sensors 3 and electric telescopic rods 4 are electrically connected to the controller via wires. The movable rods of the four electric telescopic rods 4 are connected to a support plate 5. When boiling water, the double-walled kettle 2 filled with water is placed on the power supply base 1. The four pressure sensors 3 detect the total weight of the double-walled kettle 2 filled with water as 'a'. After the water boils, if boiling continues, the total weight of the double-walled kettle 2 filled with water will gradually decrease. The total weight of the double-walled kettle 2 after the water evaporates is 'b'. Each time water is boiled... Pressure sensor 3 automatically detects the original overall weight 'a'. The user can set a fixed weight difference value 'c'. When the overall weight difference of the double-layer kettle 2 filled with water reaches the difference threshold set by pressure sensor 3, i.e., ab = c, the controller controls the four electric telescopic rods 4 to work. The movable rods of the four electric telescopic rods 4 extend and push the support plate 5 upward. The support plate 5 supports the double-layer kettle 2 and pushes the double-layer kettle 2 upward, causing the interface 20 of the double-layer kettle 2 to separate from the power supply head 10 of the power supply base 1, realizing power-off operation, thereby preventing dry burning. After the user removes the double-layer kettle 2, the movable rods of the electric telescopic rods 4 can be reset and retracted through the control panel to avoid affecting the next water boiling.

[0035] In this embodiment, when the movable rod of the electric telescopic rod 4 is fully retracted, the bottom of the support plate 5 is in contact with the top of the power supply base 1, and the top of the support plate 5 is 2-4mm away from the bottom of the double-layer kettle body 2, so as to avoid the support plate 5 affecting the pressure sensor 3's weight detection of the double-layer kettle body 2.

[0036] Specifically, the bottom of the support plate 5 is provided with four circular sleeves 52, and the ends of the movable rods of the four electric telescopic rods 4 are respectively inserted into the four circular sleeves 52, which facilitates the connection between the support plate 5 and the electric telescopic rods 4.

[0037] Furthermore, a circular hole a50 is provided in the middle of the top of the support plate 5 for the power supply head 10 to pass through. The inner diameter of the circular hole a50 is larger than the maximum outer diameter of the power supply head 10 to avoid friction.

[0038] Furthermore, the top of the support plate 5 has four circular holes b51 arranged in a matrix, and four circular blocks 21 pass through the four circular holes b51 respectively.

[0039] Furthermore, the inner diameter of the circular hole b51 is larger than the outer diameter of the circular solid block 21, which will not hinder the movement of the circular solid block 21 and avoid affecting the accuracy of the pressure sensor 3. The top of the inner wall of the circular hole b51 is provided with a chamfered surface 53, which is conducive to the circular solid block 21 passing through the circular hole b51.

[0040] Furthermore, the bottom of the power supply base 1 is provided with multiple rubber pads 6 arranged in a circular array. The rubber pads 6 are adhered to the bottom of the power supply base 1 to improve the stability of the power supply base 1.

[0041] In this embodiment, the anti-dry-boil device for the double-walled electric kettle is used by the user first placing the double-walled kettle body 2 on the power supply base 1, aligning and connecting the interface 20 at the bottom of the double-walled kettle body 2 with the power supply head 10 at the top of the power supply base 1. At this time, the power supply head 10 provides power to the heating element at the bottom of the double-walled kettle body 2 through electrical connection. Subsequently, four pressure sensors 3 arranged in a matrix detect the pressure values ​​transmitted by the four circular solid blocks 21 at the bottom of the double-walled kettle body 2, and collect the total weight a of the double-walled kettle body 2 after it is filled with water in real time. When the water boils, if the user does not turn off the power in time and the heating continues, the water in the double-walled kettle body 2 gradually evaporates, and the weight decreases to b. The pressure sensors 3 transmit the weight difference c (i.e., ab) to the controller inside the power supply base 1. When c When the value reaches the preset threshold, the controller activates the electric telescopic rods 4 in the four rectangular mounting slots 11. The movable rods of the four electric telescopic rods 4 extend synchronously, pushing the support plate 5 upward. The support plate 5 is fixed to the end of the movable rod of the electric telescopic rod 4 through the circular sleeve block 52 to ensure stable lifting action. The support plate 5 smoothly lifts the double-layer kettle body 2 until the interface 20 and the power supply head 10 are completely separated, realizing forced power cut-off. After power cut-off, the user can operate the electric telescopic rods 4 to reset and retract through the control panel on the outer wall of the power supply base 1. The support plate 5 then moves down to its original position, and its bottom is in contact with the top of the power supply base 1. The multiple annular array rubber pads 6 at the bottom of the power supply base 1 maintain the stability of the equipment placement by increasing friction and avoiding displacement interference during operation.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A dry-boil prevention device for a double-walled electric kettle, comprising a power supply base (1) and a double-walled kettle body (2), wherein a power supply head (10) is provided at the center of the top of the power supply base (1), and a mating interface (20) adapted to the power supply head (10) is provided at the center of the bottom of the double-walled kettle body (2), characterized in that: The top of the power supply base (1) is embedded with four pressure sensors (3) arranged in a matrix. The bottom of the double-layer pot body (2) is provided with four circular blocks (21). The bottom of the four circular blocks (21) abuts against the detection surfaces of the four pressure sensors (3). The top of the power supply base (1) is provided with four rectangular mounting slots (11) arranged in a matrix. Each of the four rectangular mounting slots (11) is provided with an electric telescopic rod (4). The movable rods of the four electric telescopic rods (4) are connected to a support plate (5).

2. The dry-burn preventing apparatus for a double-layer electric kettle according to claim 1, wherein: When the movable rod of the electric telescopic rod (4) is fully retracted, the bottom of the support plate (5) is in contact with the top of the power supply base (1), and the top of the support plate (5) is 2-4mm away from the bottom of the double-layer pot body (2).

3. The dry-burn preventing apparatus for a double-layer electric kettle according to claim 1, wherein: The bottom of the support plate (5) is provided with four circular sleeves (52), and the ends of the four electric telescopic rods (4) are respectively inserted into the four circular sleeves (52).

4. The dual-layer electric kettle dry-burn preventing device according to claim 1, characterized in that: The support plate (5) has a circular hole a (50) at the center of its top for the power supply head (10) to pass through. The inner diameter of the circular hole a (50) is larger than the maximum outer diameter of the power supply head (10).

5. The dual-layer electric kettle dry-burn preventing device according to claim 1, characterized in that: The top of the support plate (5) has four circular holes b (51) arranged in a matrix, and the four circular blocks (21) pass through the four circular holes b (51) respectively.

6. The dry-burn preventing apparatus for a double-layer electric kettle according to claim 5, wherein: The inner diameter of the circular hole b (51) is larger than the outer diameter of the circular solid block (21), and the top of the inner wall of the circular hole b (51) is provided with a chamfered surface (53).

7. The dual-layer electric kettle dry-burn preventing device according to claim 1, characterized in that: The bottom of the power supply base (1) is provided with a plurality of rubber pads (6) arranged in a circular array, and the rubber pads (6) are adhered to the bottom of the power supply base (1).

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