Self-cutoff radiant liquid heater
By insulating the heating wire element and liquid sensing element at the bottom of the glass kettle and combining them with a spring switch assembly, the problems of short circuit risk and low heating efficiency when the glass kettle breaks are solved, achieving automatic power-off protection and improving safety and heating efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO SHANGYI ELECTRIC CO LTD
- Filing Date
- 2025-07-20
- Publication Date
- 2026-05-26
AI Technical Summary
The glass kettle body is prone to cracking during heating, posing a risk of short circuit in the heating wire, and has low heating efficiency, making it impossible to achieve automatic power-off protection.
The heating wire element and liquid sensing element are designed with an insulating environment, and the automatic power-off is achieved through a spring switch assembly to avoid the risk of short circuit and improve heating efficiency.
It effectively avoids the risk of short circuits when the glass kettle body breaks, improves heating efficiency, ensures safety during use, and achieves automatic power-off protection.
Smart Images
Figure CN224268973U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of water boiling appliances, and specifically to a thermal radiation liquid heater with automatic power-off function. Background Technology
[0002] The one-piece molded glass body of the kettle heats the liquid without the impact of rubber seals on the water quality, thus improving the drinking experience. For example, CN219460879U describes an electric kettle with an induction detection function, providing an accurate and effective way to detect the water level and temperature. This is particularly useful for containers without openings, such as glass or ceramic kettles, allowing for more efficient implementation of the desired functions.
[0003] However, glass kettles are prone to bottom cracking when subjected to impact, dry burning, or excessive heat deformation. If the glass kettle is heated by an electric heating wire and the liquid heater is energized, there is a risk of short circuit in the heating wire, posing a risk of electric shock to the user.
[0004] Electric kettles use a heating plate to heat the glass body, which has low heating efficiency and makes it difficult to transfer heat to the liquid. This results in a lot of waste of electrical and thermal energy. Furthermore, it cannot solve the problem of automatically shutting off the power when the glass body breaks. Therefore, improvements are needed. Utility Model Content
[0005] To overcome the problems existing in related technologies, this utility model provides an automatic power-off thermal radiation liquid heater to solve the technical problems of short circuit risk of heating wire when the glass pot body breaks and low heating efficiency.
[0006] According to a first aspect of the present invention, an automatic power-off thermal radiation liquid heater is provided. The thermal radiation liquid heater includes a kettle body device, the kettle body device including a glass kettle body, a kettle body bottom shell and a heating plate assembly, the heating plate assembly including a heat insulation plate and a heating wire element disposed on the heat insulation plate, the opening of the heat insulation plate abutting against the bottom of the glass kettle body, and a thermal radiation cavity being formed between the heat insulation plate and the glass kettle body; wherein, the outer peripheral wall of the conductive end of the heating wire element is in an insulating environment;
[0007] The kettle body device also includes a liquid sensing element and a spring switch assembly. The spring switch assembly is electrically connected to the heating wire element. The sensing end of the liquid sensing element is located in the thermal radiation cavity. The liquid sensing element is used to detect the liquid parameters in the thermal radiation cavity. The spring switch assembly disconnects the power supply to the heating wire element according to the electrical signal of the liquid sensing element.
[0008] In one embodiment, the heating wire element includes a connected resistive section and a heating section, the heating section being distributed within the thermal radiation cavity, and the resistive section being embedded in the heat insulation plate. The resistive section is connected to a conductive end or is part of a conductive end, so that the resistive section is in an insulating environment.
[0009] In one embodiment, the heat insulation plate includes a positive electrode channel and a negative electrode channel communicating with the thermal radiation cavity, and the resistive segment extends into the positive electrode channel and / or the negative electrode channel.
[0010] In one embodiment, the heating wire element includes a heating section and a conductive end connected to the heating section. The conductive end is covered with an insulating material that extends to a portion of the heating section, so that the conductive end is in an insulating environment.
[0011] In one embodiment, the heating plate assembly further includes a clamp and an elastic element. The elastic element is sleeved on the glass pot body, and the clamp is clamped to the elastic element and supports the heat insulation plate against the bottom of the glass pot body.
[0012] In one embodiment, the kettle body device includes an elastic pre-tightening mechanism installed on the bottom shell of the kettle body, the elastic pre-tightening mechanism elastically pushing the heat insulation plate against the bottom of the glass kettle body.
[0013] In one embodiment, the kettle body device further includes a temperature sensor mounted on the heating plate assembly, the temperature sensor and the liquid sensing element being arranged side by side at intervals.
[0014] In one embodiment, the liquid sensing element is located in the central region of the thermal radiation cavity, and the heating wire element surrounds the liquid sensing element.
[0015] In one embodiment, the sensing end of the liquid sensing element protrudes toward the glass body, wherein the protrusion height of the sensing end exceeds the protrusion height of the heating wire element.
[0016] In one embodiment, the device further includes a base device, the base device having a conductive component, the kettle body device being movably placed on the base device and electrically connected to the conductive component.
[0017] The technical solution provided by the embodiments of this utility model can include the following beneficial effects: the outer peripheral wall of the conductive end of the heating wire element is in an insulating environment, so even if the glass body of the kettle is broken, the liquid only soaks into the heating wire element and will not cause a short circuit, avoiding the risk of personnel contact. The liquid sensing element can detect and output an electrical signal in a timely manner when liquid appears in the heat radiation cavity. The pop-up switch assembly can control the kettle body to cut off the power based on the electrical signal, thereby achieving an automatic power-off effect and greatly improving the safety of use. Attached Figure Description
[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.
[0019] Figure 1 This is a schematic diagram of the structure of a liquid heater according to one embodiment.
[0020] Figure 2 This is a partial cross-sectional schematic diagram of a liquid heater according to one embodiment.
[0021] Figure 3 yes Figure 2 A magnified structural diagram of point A in the middle.
[0022] Figure 4 This is a partial cross-sectional schematic diagram of a heating plate assembly according to one embodiment.
[0023] Figure 5 This is a partial cross-sectional schematic diagram illustrating another heating plate assembly according to one embodiment.
[0024] Figure 6 This is a schematic diagram of the base device according to one embodiment.
[0025] In the figure, the kettle body device is 10; the glass kettle body is 11; the snap-fit groove is 111; the heating plate assembly is 12; the heat insulation plate is 121; the heat radiation cavity is 1211; the heating wire element is 122; the heating section is 1221; the resistance section is 1222; the insulating material is 1223; the conductive end is 1224; the liquid sensing element is 123; the clamp is 124; the elastic element is 1241; the snap-fit ring is 1242; the elastic pre-tightening mechanism is 13; the pre-compression spring is 131; the kettle body bottom shell is 14; the conductive component is 141; the spring switch assembly is 142; the handle is 15; the kettle lid is 16; the base device is 20; the upper base is 21; the flow guide hole is 211; the mounting groove is 212; and the lower base is 22. Detailed Implementation
[0026] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the 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, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.
[0027] like Figures 1 to 3 As shown, this utility model provides an automatic power-off thermal radiation liquid heater. The liquid heater includes a pot body device 10, which can be directly connected to a power source.
[0028] The kettle body device 10 includes a glass kettle body 11, a kettle body bottom shell 14 installed on the glass kettle body 11, and a heating plate assembly 12. The heating plate assembly 12 is installed at the bottom of the glass kettle body 11, and the kettle body bottom shell 14 is fastened to the heating plate assembly 12.
[0029] Optionally, the glass body 11 is integrally formed from glass; or, the glass body 11 is integrally formed from metal. Optionally, a lid 16 is installed at the spout of the glass body 11; optionally, a handle 15 is installed on one side of the glass body 11.
[0030] In this embodiment, the heating plate assembly 12 includes a heat insulation plate 121 and a heating wire element 122 disposed on the heat insulation plate 121. The heat insulation plate 121 is made of heat insulation material to reduce heat loss from the heat insulation plate 121, thereby concentrating the heat output towards the bottom of the glass pot body 11, greatly improving heating efficiency. For example, the heat insulation plate 121 can be made of asbestos, clay, ceramic, or other heat insulation materials.
[0031] The heat insulation plate 121 is provided with a concave heat radiation cavity 1211. The opening of the heat insulation plate 121 is pressed against the bottom of the glass pot body 11 to achieve heat radiation heating. The heating wire element 122 is located inside the heat radiation cavity 1211, and the depth of the concavity of the heat radiation cavity 1211 is greater than the height of the heating wire element 122.
[0032] To address the risk of short circuits and contact issues arising from a crack at the bottom of the glass vessel 11, the outer peripheral wall of the conductive end 1224 of the heating wire element 122 is insulated. Since the heating wire element 122 heats itself through resistance, insulating the outer peripheral wall of the conductive end 1224 of the heating wire element 122 prevents short circuits.
[0033] The kettle body device 10 also includes a liquid sensing element 123 and a spring switch assembly 142. The liquid sensing element 123 is used to detect liquid or water vapor in the corresponding space and output an electrical signal. The spring switch assembly 142 is used to control the current flow between the heating plate assembly 12 and the base device 20, thereby achieving automatic power-off.
[0034] A spring switch assembly 142 is used in the existing liquid heater to cut off the power after the liquid in the kettle body device 10 has reached a specified stable temperature.
[0035] In another embodiment, the liquid heater further includes a base device 20, which is connected to a power source via a plug. The kettle body device 10 and the base device 20 are used together. The base device 20 is provided with a mounting groove 212, which contains a conductive component 141. The kettle body device 10 is placed into the mounting groove 212 and quickly connected to the conductive component 141. The base device 20 can provide power to the kettle body device 10.
[0036] An insulating environment is used to prevent the two conductive ends 1224 of the heating wire element 122 connected to the power supply from being directly short-circuited through the liquid, thereby avoiding contact risks.
[0037] like Figure 4 As shown, optionally, the insulating environment is formed by the structure of the heat insulation plate 121, for example, part of the heating resistor of the heating wire element 122 is embedded in the heat insulation plate 121, thereby avoiding short circuit problems.
[0038] like Figure 5 As shown, optionally, the insulating environment is made of an external insulating material 1223, such as the insulating material 1223 attached to a portion of the conductive end 1224 of the heating wire element 122, thereby avoiding short circuit problems.
[0039] like Figures 3 to 5 As shown, in one embodiment, the heating wire element 122 includes a connected resistance section 1222 and a heating section 1221. The heating section 1221 is distributed within the heat radiation cavity 1211, and the resistance section 1222 is embedded in the heat insulation plate 121. When energized, the heating section 1221 outputs heat radiation, thereby directly heating the glass pot body 11 without the need for contact heat conduction, greatly improving heating efficiency and reducing heat loss. The resistance section 1222 is connected to the conductive end 1224, or the resistance section 1222 is part of the conductive end 1224, so that the resistance section 1222 is within the insulating environment formed by the heat insulation plate 121.
[0040] The heating element 1221 is located inside the heat radiation cavity 1211, while the resistance element 1222 is embedded inside the heat insulation plate 121. Even if the bottom of the glass pot body 11 breaks and liquid rushes into the heat radiation cavity 1211, even if the heating element 1221 is directly conductive through the liquid, the resistance element 1222 is located inside the heat insulation plate 121, so there will be no short circuit accident, and the safety is high.
[0041] like Figure 5As shown, in another embodiment, the heating wire element 122 includes a heating section 1221 and a conductive end 1224 connected to the heating section 1221. The conductive end 1224 is covered with an insulating material 1223, which extends to a portion of the heating section 1221, so that the conductive end 1224 is in an insulating environment. The heat resistance of the insulating material 1223 is higher than the heating temperature of the heating section 1221. The insulating material 1223 covers the conductive end 1224, thereby avoiding short circuit problems and greatly improving safety in use.
[0042] like Figures 1 to 3 As shown, in the above embodiment, the pop-up switch assembly 142 is electrically connected to the heating wire element 122, the sensing end of the liquid sensing element 123 is located in the thermal radiation cavity 1211, the liquid sensing element 123 is used to detect the liquid parameters in the thermal radiation cavity 1211, and the pop-up switch assembly 142 disconnects the power supply of the heating wire element 122 according to the electrical signal of the liquid sensing element 123.
[0043] The liquid sensing element 123 is disposed on the heating plate assembly 12 and located below the glass pot body 11. Even if the bottom of the glass pot body 11 breaks and liquid rushes into the heat radiation chamber 1211, the liquid sensing element 123 outputs an electrical signal when the bottom of the glass pot body 11 breaks and comes into contact with the liquid. The pop-up switch assembly 142 controls the power off to avoid the risk of electric shock.
[0044] More preferably, the kettle body device 10 also includes a temperature sensor installed on the heating plate assembly 12, with the temperature sensor and the liquid sensing element 123 arranged side by side at intervals. The temperature sensor can detect the temperature inside the heat insulation plate 121. The temperature sensor is linked with the spring switch assembly 142. When the liquid sensing element 123 breaks at the bottom of the glass kettle body 11 and contacts the heating plate assembly 12, the temperature inside the heat insulation plate 121 drops significantly, thus controlling the spring switch assembly 142 to cut off the power, thereby forming a linkage.
[0045] More preferably, the liquid sensing element 123 is located in the central region of the heat radiation cavity 1211, and the heating section 1221 surrounds the liquid sensing element 123. The liquid sensing element 123 employs a liquid sensor; centrally positioning the liquid sensing element 123 within the heat radiation cavity 1211 and surrounding it with the heating section 1221 expands the heating range and facilitates the layout and assembly of the heating section 1221. Furthermore, given the high risk of breakage at the bottom of the glass vessel 11, centrally positioning the liquid sensing element 123 also improves its response speed to liquid detection.
[0046] Furthermore, the liquid sensing element 123 protrudes towards the glass body 11, and the protrusion height of the liquid sensing element 123 exceeds the protrusion height of the heating section 1221. The large protrusion height of the liquid sensing element 123 allows it to contact the liquid earlier, further reducing the risk.
[0047] In a preferred embodiment, the heat insulation plate 121 includes a positive electrode channel and a negative electrode channel communicating with the heat radiation cavity 1211, and a resistor segment 1222 extends into the positive electrode channel and / or the negative electrode channel. The two ends of the heating wire element 122 are used to connect to the positive and negative terminals of the power supply, and the resistor segment 1222 and the heating segment 1221 are distributed between the positive and negative terminals of the power supply.
[0048] When the resistor segment 1222 is set as one end of the heating segment 1221, it can be arbitrarily embedded in the positive or negative channel; when the resistor segment 1222 is set as both ends of the heating segment 1221, the resistor segment 1222 can be embedded in both the positive and negative channels at the same time.
[0049] The heating plate assembly 12 and the glass kettle body 11 are detachably connected. The heating plate assembly 12 also includes a clamp 124 and an elastic element 1241. The elastic element 1241 is sleeved on the glass kettle body 11. The clamp 124 clamps the elastic element 1241 and supports the heat insulation plate 121 against the bottom of the glass kettle body 11.
[0050] The elastic element 1241 is sleeved on the glass pot body 11 to separate the glass pot body 11 from the clamp 124. This not only prevents the clamp 124 from being directly and rigidly connected to the glass pot body 11, but also achieves heat blockage and prevents leakage.
[0051] Preferably, the glass body 11 is a one-piece glass body, and the bottom of the glass body 11 is provided with a recessed snap-fit groove 111, and the heating plate assembly 12 snaps into the snap-fit groove 111.
[0052] The elastic element 1241 is fitted around the snap-fit groove 111, and the clamp 124 forms a snap-fit connection with the snap-fit groove 111, thereby improving the connection firmness and accuracy.
[0053] The bottom of the clamp 124 forms a tray structure. The heat insulation tray 121 abuts against the bottom of the glass pot body 11 through the bottom of the clamp 124, so that the opening of the heat insulation tray 121 abuts against the glass pot body 11 to form a snap-fit connection. Optionally, the clamp 124 includes two hinged locking rings 1242, the free ends of which close and engage to lock the elastic member 1241.
[0054] More preferably, the kettle body assembly 10 includes an elastic pre-tightening mechanism 13 installed on the bottom shell 14 of the kettle body. The elastic pre-tightening mechanism 13 elastically pushes the heat insulation plate 121 against the bottom of the glass kettle body 11. The elastic pre-tightening mechanism 13 abuts and defines the bottom shell 14 of the kettle body and the heat insulation plate 121, thereby keeping the heat insulation plate 121 tightly against the bottom of the glass kettle body 11, reducing the assembly precision requirements of the heat insulation plate 121 and the clamping member 124.
[0055] Preferably, the elastic preload mechanism 13 is one or more preloaded springs 131 to form an abutment support. Alternatively, the elastic preload mechanism 13 is a preload pad to abut against the bottom of the support heat insulation plate 121.
[0056] like Figure 2 and Figure 6 As shown, the bottom shell 14 of the kettle body covers the heating plate assembly 12, and a bottom space is formed between the bottom shell 14 and the heating plate assembly 12. The bottom shell 14 is provided with multiple heat dissipation holes, which are connected to the bottom space to form a heat dissipation channel. Preferably, the multiple heat dissipation holes are evenly distributed around the bottom shell 14, thereby forming a uniform distribution structure at any angle.
[0057] The base assembly 20 includes a fan assembly, a lower base 22 and an upper base 21 fixedly connected together. An electrical cavity and a heat dissipation cavity are formed between the lower base 22 and the upper base 21, and the fan assembly is installed in the heat dissipation cavity. A partition is provided inside the lower base 22 and the upper base 21, forming a communicating electrical cavity and a heat dissipation cavity. The heat dissipation cavity is a space formed by an annular tube, and the fan assembly promotes airflow within the space to prevent heat concentration.
[0058] The upper base 21 is provided with a flow guide hole 211 that communicates with the electrical cavity. The flow guide hole 211 is offset from the heat dissipation cavity so that the heat dissipation cavity can guide gas to flow along the flow guide hole 211 to the heat dissipation cavity, and then dissipate heat from the base device 20.
[0059] The bottom shell 14 of the kettle body is provided with multiple heat dissipation holes. The kettle body device 10 is assembled to the base device 20, and at least some of the heat dissipation holes are connected to the flow guide hole 211.
[0060] When the liquid heater is in use, the kettle body device 10 is assembled to the base device 20, and at least some of the heat dissipation holes are connected to the flow guide holes 211, thereby connecting the bottom space of the kettle with the electrical cavity, so that the airflow and some heat in the kettle body device 10 can be discharged along the heat dissipation cavity, and the operating temperature of the kettle body device 10 is kept stable.
[0061] In one embodiment, the kettle body device 10 further includes a water level monitoring component disposed at the bottom of the glass kettle body 11, the glass kettle body 11 being made of glass material, and the water level monitoring component using induction to detect the water level inside the glass kettle body 11.
[0062] The water level monitoring component is equipped with an anti-dry-burning element, which is electrically connected to the heating plate assembly 12. When the water level inside the glass kettle body 11 is zero, the anti-dry-burning element outputs an electrical signal. Upon receiving the electrical signal output by the anti-dry-burning element, the heating plate assembly 12 stops heating to prevent dry-burning damage to the kettle body device 10.
[0063] Furthermore, the kettle body assembly 10 is equipped with a temperature detection component, which is located away from the heating plate assembly 12. This temperature detection component allows for non-contact detection of the liquid temperature inside the glass kettle body 11, thereby preventing damage to the glass kettle body 11. Preferably, the temperature detection component is equipped with a non-contact temperature sensor for accurate temperature measurement.
[0064] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of this application and include common knowledge or customary technical means in the art that are not disclosed in this invention.
Claims
1. An automatic power-off radiant liquid heater, comprising a kettle body assembly, the kettle body assembly including a glass kettle body, a kettle body bottom shell, and a heating plate assembly, characterized in that: The heating plate assembly includes a heat insulation plate and a heating wire element disposed on the heat insulation plate. The opening of the heat insulation plate is pressed against the bottom of the glass pot body, and a heat radiation cavity is formed between the heat insulation plate and the glass pot body. The outer peripheral wall of the conductive end of the heating wire element is in an insulating environment. The kettle body device also includes a liquid sensing element and a spring switch assembly. The spring switch assembly is electrically connected to the heating wire element. The sensing end of the liquid sensing element is located in the thermal radiation cavity. The liquid sensing element is used to detect the liquid parameters in the thermal radiation cavity. The spring switch assembly disconnects the power supply to the heating wire element according to the electrical signal of the liquid sensing element.
2. The thermal radiation liquid heater according to claim 1, characterized in that, The heating wire element includes a connected resistive section and a heating section. The heating section is distributed within the thermal radiation cavity, and the resistive section is embedded in the heat insulation plate. The resistive section is connected to a conductive end or is part of a conductive end, so that the resistive section is in an insulating environment.
3. The thermal radiation liquid heater according to claim 2, characterized in that, The heat insulation plate includes a positive electrode channel and a negative electrode channel connected to the heat radiation cavity, and the resistive segment extends into the positive electrode channel and / or the negative electrode channel.
4. The thermal radiation liquid heater according to claim 1, characterized in that, The heating wire element includes a heating section and a conductive end connected to the heating section. The conductive end is covered with an insulating material that extends to a portion of the heating section, so that the conductive end is in an insulating environment.
5. The thermal radiation liquid heater according to claim 1, characterized in that, The heating plate assembly also includes a clamp and an elastic element. The elastic element is sleeved on the glass pot body, and the clamp is clamped to the elastic element and supports the heat insulation plate against the bottom of the glass pot body.
6. The thermal radiation liquid heater according to claim 1, characterized in that, The kettle body device includes an elastic pre-tightening mechanism installed on the bottom shell of the kettle body, the elastic pre-tightening mechanism elastically pushing the heat insulation plate against the bottom of the glass kettle body.
7. The thermal radiation liquid heater according to claim 1, characterized in that, The kettle body device also includes a temperature sensor installed on the heating plate assembly, and the temperature sensor and the liquid sensing element are arranged side by side at intervals.
8. The thermal radiation liquid heater according to any one of claims 1 to 7, characterized in that, The liquid sensing element is located in the central region of the thermal radiation cavity, and the heating wire element surrounds the liquid sensing element.
9. The thermal radiation liquid heater according to claim 8, characterized in that, The sensing end of the liquid sensing element protrudes towards the glass body, wherein the protrusion height of the sensing end exceeds the protrusion height of the heating wire element.
10. The thermal radiation liquid heater according to claim 8, characterized in that, It also includes a base device, which is provided with a conductive component. The kettle body device is movably placed on the base device and electrically connected to the conductive component.