Liquid heating container

Abstract

The utility model relates to a liquid heating container which comprises an integrated kettle body, the integrated kettle body is made of a non-metal material and comprises a bottom wall, and an electromagnetic induction layer is arranged on the inner surface of the bottom wall; the base is used for supporting the integrated kettle body, and the base is provided with an electromagnetic heating piece used for being matched with the electromagnetic induction layer; the integrated kettle body is further provided with an isolation layer, and the isolation layer completely covers the surface of the side, away from the bottom wall, of the electromagnetic induction layer in the axial direction of the integrated kettle body. The electromagnetic induction layer is arranged on the inner surface of the bottom wall, the heat transfer distance between the electromagnetic induction layer and liquid in the kettle body is shortened, rapid heat transfer is achieved, and the heating efficiency of the liquid heating container is improved. According to the liquid heating container, the electromagnetic induction layer can be prevented from being in direct contact with the liquid in the kettle body by arranging the isolating layer totally covering the surface of the electromagnetic induction layer, the influence on the liquid in the kettle body caused by oxidation of the electromagnetic induction layer can be avoided on the basis of not influencing the heating efficiency of the liquid heating container, and the safety of the liquid heating container is improved.

Description

Technical Field

[0001] This application relates to the field of household appliances, and particularly to a liquid heating container. Background Art

[0002] Some liquid heating containers adopt IH heating technology (electromagnetic heating technology) to improve heating efficiency, that is, a magnetic conductive sheet is provided at the bottom of the non-metallic kettle body, and an electromagnetic heating element is provided on the base, and the heating function of the liquid heating container is realized through electromagnetic induction between the magnetic conductive sheet and the electromagnetic heating element.

[0003] In the prior art, the electromagnetic induction layer is usually provided on the outer surface of the bottom wall of the kettle body. However, due to the low thermal conductivity of the non-metallic material, the heating efficiency of the liquid heating container is relatively low. Utility Model Content

[0004] This application provides a liquid heating container, which can solve the problem of relatively low heating efficiency of the liquid heating container in the prior art.

[0005] This application provides a liquid heating container, including an integrated kettle body. The integrated kettle body is made of non-metallic material. The integrated kettle body includes a bottom wall, and an electromagnetic induction layer is provided on the inner surface of the bottom wall; a base for supporting the integrated kettle body, and an electromagnetic heating element for cooperating with the electromagnetic induction layer is provided on the base; an isolation layer is further provided on the integrated kettle body, and along the axial direction of the integrated kettle body, the isolation layer completely covers the surface of the electromagnetic induction layer away from the bottom wall.

[0006] In the above solution, the integrated structure enables the bottom wall and the side wall of the kettle body to have uniform thickness, which is beneficial to improving the heat conduction uniformity of the integrated kettle body, ensuring that the liquid inside the kettle body can be heated evenly, and thus beneficial to improving the heating efficiency of the liquid heating container. The electromagnetic induction layer generates eddy currents due to the induction of the alternating magnetic field, and the heat generated by the eddy currents can heat the bottom wall, so that the liquid in the inner cavity can be heated. Compared with the heating method of the heating plate, the electromagnetic heating has less heat loss and can improve the heating efficiency of the liquid heating container. In the liquid heating container provided by the embodiment of the present application, by arranging the electromagnetic induction layer on the inner surface of the bottom wall, the heat transfer distance between the electromagnetic induction layer and the liquid in the integrated kettle body is shortened, rapid heat transfer in the electromagnetic heating process can be realized, which is beneficial to improving the heating efficiency of the liquid heating container, and can also reduce the risk of heat accumulation in the electromagnetic induction layer due to the low thermal conductivity of the non-metallic material, and reduce the risk of the integrated kettle body cracking due to excessive heat and uneven heat transfer. Moreover, by providing an isolation layer that completely covers the surface of the electromagnetic induction layer, it is possible to prevent the electromagnetic induction layer from directly contacting the liquid in the integrated kettle body. On the basis of not affecting the heating efficiency of the liquid heating container, it is possible to avoid the oxidation of the electromagnetic induction layer from affecting the liquid in the integrated kettle body, which is beneficial to improving the safety of the liquid heating container and ensuring that users can drink water healthily.

[0007] In a possible design, the isolation layer is a glass layer or a ceramic layer.

[0008] In the above solution, the components of glass and ceramic are safe and will not affect the health of users' drinking water. Moreover, the costs of glass and ceramic are relatively low, and the manufacturing process is relatively simple, which is beneficial to improving the heating efficiency of the integrated kettle body while reducing the manufacturing cost of the integrated kettle body.

[0009] In a possible design, the thickness D1 of the isolation layer is 0.1 mm to 0.5 mm.

[0010] In the above solution, if D1 is too small (for example, less than 0.1 mm), it will cause insufficient structural strength of the isolation layer and affect the service life of the isolation layer; if D1 is too large (for example, greater than 0.5 mm), the isolation layer is too thick, which will affect its heat transfer effect, resulting in a decrease in the heating efficiency of the liquid heating container, and when the heat of the electromagnetic induction layer is too large, the isolation layer is prone to cracking due to uneven heat conduction. Therefore, when the thickness D1 of the isolation layer is 0.1 mm to 0.5 mm, it can ensure the heating efficiency of the liquid heating container and extend the service life of the isolation layer.

[0011] In a possible design, the porosity of the isolation layer ≤ 0.5%.

[0012] In the above solution, if the porosity of the isolation layer is too large (for example, greater than 0.5%), the permeability coefficient of the isolation layer will be too large, and the liquid in the integrated pot body will penetrate through the isolation layer into the electromagnetic induction layer, and the isolation layer will not be able to play the role of sealing and isolating the electromagnetic induction layer. Therefore, the porosity of the isolation layer should be less than or equal to 0.5% to ensure that the permeability coefficient of the isolation layer ≤ 0.01 mm / h, so as to prevent the liquid in the integrated pot body from contacting the electromagnetic induction layer after penetrating through the isolation layer, avoid the oxidation of the electromagnetic induction layer and affect the liquid in the integrated pot body, and further improve the safety of the liquid heating container.

[0013] In a possible design, the thickness D2 of the electromagnetic induction layer is 10 μm to 400 μm.

[0014] In the above solution, if D2 is too small (for example, less than 10 μm), the power of the electromagnetic induction layer will be too low, affecting the heating efficiency of the liquid heating container; if D2 is too large (for example, greater than 400 μm), the resistance of the electromagnetic induction layer will increase, affecting the heating efficiency of the liquid heating container, and the electromagnetic induction layer will also crack due to excessive internal stress. Therefore, when the thickness D2 of the electromagnetic induction layer is 10 μm to 400 μm, it can not only improve the heating efficiency of the liquid heating container, but also help to extend the service life of the electromagnetic induction layer.

[0015] In a possible design, the porosity of the electromagnetic induction layer is 5% to 8%.

[0016] In the above solution, if the porosity of the electromagnetic induction layer is too small (for example, less than 5%), the whole electromagnetic induction layer is prone to expand and deform when heated, and the integrated pot body is prone to crack or break when subjected to the stress of electromagnetic induction, affecting the service life of the integrated pot body; if the porosity of the electromagnetic induction layer is too large (for example, greater than 8%), the structure of the electromagnetic induction layer will be too loose, with insufficient strength and stability, affecting the service life of the electromagnetic induction layer. Therefore, when the porosity of the electromagnetic induction layer is 5% to 8%, it can ensure that the electromagnetic induction layer is not prone to expand and deform, reduce the risk of damage to the integrated pot body, extend the service life of the integrated pot body, and ensure that the electromagnetic induction layer has sufficient structural strength and stability, and extend the service life of the electromagnetic induction layer.

[0017] In a possible design, the resistivity of the electromagnetic induction layer is 1×10 -6 Ω·m to 2×10 -6 Ω·m.

[0018] In the above solution, if the resistivity of the electromagnetic induction layer is too small (for example, less than 1×10 -6Ω·m), the requirements for the material of the electromagnetic induction layer are relatively high, and pure metals with very low resistivity need to be used to make the electromagnetic induction layer, resulting in too high production cost of the electromagnetic induction layer; if the resistivity of the electromagnetic induction layer is too large (for example, greater than 2×10 -6 Ω·m), it will cause the conductivity of the electromagnetic induction layer to decrease and affect the heating efficiency of the liquid heating container. Therefore, when the resistivity of the electromagnetic induction layer is 1×10 -6 Ω·m~2×10 -6 Ω·m, it can not only improve the heating efficiency of the liquid heating container, but also appropriately reduce the production cost of the liquid heating container.

[0019] In a possible design, the thermal expansion coefficient of the electromagnetic induction layer is 5×10 -6 / ℃~10×10 -6 / ℃.

[0020] In the above solution, if the thermal expansion coefficient of the electromagnetic induction layer is too small (for example, less than 10×10 -6 / ℃), the difference in the thermal expansion coefficient from that of the integrated kettle body and the isolation layer will be too large, resulting in different expansion speeds of the electromagnetic induction layer, the integrated kettle body and the isolation layer during heating, and the electromagnetic induction layer is prone to cracking or damage under the action of stress; if the thermal expansion coefficient of the electromagnetic induction layer is too large (for example, greater than 10×10 -6 / ℃), it will cause the thermal stability of the electromagnetic induction layer to decrease, and it is easy to cause cracking or damage of the isolation layer and the integrated kettle body when its temperature rises. Therefore, the thermal expansion coefficient of the electromagnetic induction layer is 5×10 -6 / ℃~10×10 -6 / ℃, which can ensure the thermal stability of the electromagnetic induction layer and reduce the risk of cracking or damage of the integrated kettle body, the electromagnetic induction layer and the isolation layer.

[0021] In a possible design, the integrated kettle body is made of ceramic or glass.

[0022] In the above solution, ceramics and glass have high safety and can ensure the drinking water safety of users; secondly, ceramics and glass have strong thermal stability, making the integrated kettle body have good heat resistance and stability, which is beneficial to improving the service life of the integrated kettle body.

[0023] In a possible design, at least part of the bottom wall protrudes axially outward along the integrated kettle body to form a mounting portion, and the electromagnetic induction layer and the isolation layer are located in the mounting portion; the base is provided with a receiving groove for receiving the mounting portion.

[0024] In the above solution, the installation part can be placed in the receiving groove, and the side wall of the receiving groove can limit the installation part along the radial direction of the integrated kettle body, so as to improve the stability of the integrated kettle body during the working state and prevent it from tipping over easily. Moreover, by providing the installation part and the receiving groove, the distance between the electromagnetic induction layer and the electromagnetic heating element in the axial direction of the integrated kettle body can be shortened, so as to improve the heating efficiency of electromagnetic heating.

[0025] It should be understood that the above general description and the following detailed description are only exemplary and do not limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of the liquid heating container provided by the present application;

[0027] Figure 2 is Figure 1 a schematic structural diagram of the integrated kettle body in

[0028] Figure 3 is Figure 2 a partial structural diagram of the integrated kettle body in

[0029] REFERENCE SIGNS:

[0030] 1 - integrated kettle body;

[0031] 11 - bottom wall;

[0032] 12 - installation part;

[0033] 13 - inner cavity;

[0034] 14 - side wall;

[0035] 15 - handle;

[0036] 2 - electromagnetic induction layer;

[0037] 3 - isolation layer;

[0038] 4 - base;

[0039] 41 - electromagnetic heating element;

[0040] 42 - receiving groove;

[0041] 5 - kettle lid.

[0042] The accompanying drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0043] In order to better understand the technical solution of the present application, the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0044] It should be clear that the described embodiments are only a part of the embodiments of the present application, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0045] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms of "a", "the" and "said" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0046] It should be understood that the term "and / or" used herein is only a kind of association relationship describing associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0047] It should be noted that the orientation terms such as "upper", "lower", "left" and "right" described in the embodiments of the present application are described from the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In addition, in the context, it should also be understood that when it is mentioned that an element is connected "above" or "below" another element, it can not only be directly connected "above" or "below" another element, but also be indirectly connected "above" or "below" another element through an intermediate element.

[0048] The embodiments of the present application provide a liquid heating container, such as Figure 1 shown, the liquid heating container includes an integrated kettle body 1 and a base 4, and the base 4 is used to support the integrated kettle body 1. The integrated kettle body 1 includes a bottom wall 11 and a side wall 14 formed integrally, and the bottom wall 11 and the side wall 14 together enclose an inner cavity 13 for containing liquid. The integrated structure makes the thickness of the bottom wall 11 and the side wall 14 uniform, which is beneficial to improving the heat conduction uniformity of the integrated kettle body 1, ensuring that the liquid inside the inner cavity 13 can be heated evenly, and thus beneficial to improving the heating efficiency of the liquid heating container.

[0049] In this embodiment, the integrated kettle body 1 is made of a non-metallic material with a low thermal conductivity, and the liquid heating container adopts an IH heating technology (electromagnetic heating technology) with a high heating efficiency, combined with as Figure 2As shown in the figure, an electromagnetic induction layer 2 is provided on the inner surface of the bottom wall 11, and an electromagnetic heating element 41 is provided on the base 4. The electromagnetic heating element 41 is used to cooperate with the electromagnetic induction layer 2 to achieve electromagnetic heating. The electromagnetic induction layer 2 generates eddy currents due to the induction of an alternating magnetic field, and the heat generated by the eddy currents can heat the bottom wall 11, so that the liquid in the inner cavity 13 can be heated. Compared with the heating method of a heating plate, the heat loss of electromagnetic heating is smaller, and the heating efficiency of the liquid heating container can be improved. As Figure 2 shown in the figure, the integrated kettle body 1 is further provided with an isolation layer 3. Along the axial direction Z of the integrated kettle body 1, the isolation layer 3 completely covers the surface of the electromagnetic induction layer 2 away from the bottom wall 11, that is, along the axial direction Z of the integrated kettle body 1, the projected area of the isolation layer 3 on the electromagnetic induction layer 2 is greater than or equal to the area of the electromagnetic induction layer 2, which can prevent the liquid in the inner cavity 13 from directly contacting the electromagnetic induction layer 2, thereby slowing down the oxidation rate of the electromagnetic induction layer 2 and improving the durability of the electromagnetic induction layer 2.

[0050] In the liquid heating container provided by the embodiment of the present application, by arranging the electromagnetic induction layer 2 on the inner surface of the bottom wall 11, the heat transfer distance between the electromagnetic induction layer 2 and the liquid in the inner cavity 13 is shortened, and rapid heat transfer in the electromagnetic heating process can be realized, which is beneficial to improving the heating efficiency of the liquid heating container, and can also reduce the risk of heat accumulation in the electromagnetic induction layer 2 due to the low thermal conductivity of non-metallic materials, and reduce the risk of rupture of the integrated kettle body 1 due to excessive heat and uneven heat transfer. Moreover, by providing an isolation layer 3 that completely covers the surface of the electromagnetic induction layer 2, it is possible to prevent the electromagnetic induction layer 2 from directly contacting the liquid in the inner cavity 13. On the basis of not affecting the heating efficiency of the liquid heating container, it is possible to avoid the oxidation of the electromagnetic induction layer 2 from affecting the liquid in the inner cavity 13, which is beneficial to improving the safety of the liquid heating container and ensuring that users can drink water healthily.

[0051] As Figure 2 shown in the figure, in order to improve the isolation effect of the isolation layer 3 on the electromagnetic induction layer 2, the isolation layer 3 can abut against the side wall 14 along the radial direction X of the integrated kettle body 1, that is, the isolation layer 3 and the side wall 14 can jointly seal the electromagnetic induction layer 2, further reducing the risk of contact between the electromagnetic induction layer 2 and the liquid in the inner cavity 13.

[0052] As Figure 1 shown in the figure, the liquid heating container further includes a kettle lid 5 buckled on the integrated kettle body 1 and a handle 15 installed on the side wall 14. The kettle lid 5 is used to prevent the liquid inside the inner cavity 13 from splashing, and the handle 15 facilitates the user to pick up and move the integrated kettle body 1.

[0053] In a specific embodiment, as Figure 1As shown, the electromagnetic heating element 41 can be an electromagnetic coil in a disc shape, which has a small volume and thickness, is convenient for assembly, helps to reduce the occupied space of the base 4, and achieves the lightweight of the liquid heating container. The base 4 is provided with a receiving groove 42, and the receiving groove 42 extends along the axial direction Z of the integral pot body 1. At least part of the bottom wall 11 bulges outward along the axial direction Z of the integral pot body 1 to form a mounting portion 12, and the electromagnetic induction layer 2 and the isolation layer 3 are located within the mounting portion 12.

[0054] In this embodiment, the mounting portion 12 can be placed within the receiving groove 42, and the side wall of the receiving groove 42 can limit the mounting portion 12 along the radial direction X of the integral pot body 1 to improve the stability of the integral pot body 1 during the working state and prevent it from tipping over easily. Moreover, by providing the mounting portion 12 and the receiving groove 42, the distance between the electromagnetic induction layer 2 and the electromagnetic heating element 41 along the axial direction Z of the integral pot body 1 can be shortened, so as to improve the heating efficiency of electromagnetic heating.

[0055] Specifically, the electromagnetic induction layer 2 can be in contact with the side wall of the mounting portion 12 along the radial direction X of the integral pot body 1, that is, the electromagnetic induction layer 2 covers the inner surface of the mounting portion 12, increasing the heating area of the electromagnetic induction layer 2, which is beneficial to improving the heating efficiency of the liquid heating container. Correspondingly, the isolation layer 3 can be in contact with the side wall of the mounting portion 12 along the radial direction X of the integral pot body 1, that is, the isolation layer 3 can jointly seal the electromagnetic induction layer 2 with the side wall of the mounting portion 12.

[0056] In a specific embodiment, the integral pot body 1 is made of ceramic or glass.

[0057] First of all, ceramics and glass have high safety, which can ensure the drinking water safety of users; secondly, ceramics and glass have strong thermal stability and can withstand a temperature difference of 300 °C or more, making the integral pot body 1 have good heat resistance and stability, which is beneficial to extending the service life of the integral pot body 1. Among them, when the integral pot body 1 is made of glass, it can specifically be borosilicate glass or soda-lime glass. Both borosilicate glass and soda-lime glass have a low coefficient of linear expansion and good thermal stability, making the integral pot body 1 not prone to cracking.

[0058] Of course, the integral pot body 1 can also be made of other food-grade non-metallic materials, and this embodiment does not limit this.

[0059] In a specific embodiment, the isolation layer 3 is a glass layer or a ceramic layer.

[0060] In this embodiment, the components of glass and ceramics are safe and will not affect the drinking water health of users. Moreover, the cost of glass and ceramics is relatively low, and the manufacturing process is relatively simple, which is beneficial to improving the heating efficiency of the integral pot body 1 while reducing the manufacturing cost of the integral pot body 1.

[0061] Specifically, the isolation layer 3 may include one or more of materials such as SiO2, Al2O3, B2O3, etc. The above several components have high stability and will not diffuse into the liquid in the inner cavity 13 under high-temperature environments, ensuring that no reaction occurs after the isolation layer 3 comes into contact with the liquid, and improving the safety of the isolation layer 3. The isolation layer 3 can specifically be prepared by thermal spraying, brushing, dipping, or laser cladding methods, and this embodiment does not limit this. The above several preparation methods can all ensure the structural stability of the isolation layer 3. During the use of the liquid heating container, the isolation layer 3 is not prone to breakage or detachment, and can extend the service life of the isolation layer 3.

[0062] In a specific embodiment, as Figure 3 shown, the thickness D1 of the isolation layer 3 is 0.1 mm to 0.5 mm. D1 can specifically be 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, or 0.5 mm, or other values within the above range. This embodiment does not limit this.

[0063] In this embodiment, if D1 is too small (for example, less than 0.1 mm), it will cause insufficient structural strength of the isolation layer 3 and affect the service life of the isolation layer 3; if D1 is too large (for example, greater than 0.5 mm), the isolation layer 3 is too thick, which will affect its heat transfer effect, resulting in a decrease in the heating efficiency of the liquid heating container. Moreover, when the heat of the electromagnetic induction layer 2 is too large, the isolation layer 3 is prone to rupture due to uneven heat conduction. Therefore, when the thickness D1 of the isolation layer 3 is 0.1 mm to 0.5 mm, it can not only ensure the heating efficiency of the liquid heating container but also extend the service life of the isolation layer 3.

[0064] In a specific embodiment, the porosity of the isolation layer 3 ≤ 0.5%, and can specifically be 0.05%, 0.1%, 0.15%, 0.2%, 0.25%, 0.3%, 0.35%, 0.4%, 0.45%, or 0.5%, or other values within the above range. This embodiment does not limit this.

[0065] In this embodiment, if the porosity of the isolation layer 3 is too large (for example, greater than 0.5%), it will cause too large a permeability coefficient of the isolation layer 3, and the liquid in the inner cavity 13 will penetrate through the isolation layer 3 into the electromagnetic induction layer 2, and the isolation layer 3 will not be able to play the role of sealing and isolating the electromagnetic induction layer 2. Therefore, the porosity of the isolation layer 3 should be less than or equal to 0.5% to ensure that the permeability coefficient of the isolation layer 3 ≤ 0.01 mm / h, thereby preventing the liquid in the inner cavity 13 from coming into contact with the electromagnetic induction layer 2 after penetrating through the isolation layer 3, avoiding the oxidation of the electromagnetic induction layer 2 and affecting the liquid in the inner cavity 13, and further improving the safety of the liquid heating container.

[0066] In a specific embodiment, the electromagnetic induction layer 2 may include one or more of weakly magnetic materials such as Al, Fe, Ni, etc. The above several materials can improve the stability of the electromagnetic induction layer 2, making the combination strength of the electromagnetic induction layer 2 with the bottom wall 11 and the isolation layer 3 higher, not easily falling off, not easily cracking when subjected to thermal and cold shocks, and capable of improving the service life of the electromagnetic induction layer 2. The electromagnetic induction layer 2 can be specifically prepared by thermal spraying, cold spraying, printing, laser cladding or PVD (physical vapor deposition) methods, and this embodiment does not limit this. The above several preparation methods can all ensure the structural stability of the electromagnetic induction layer 2. During the use of the liquid heating container, the electromagnetic induction layer 2 is not easily damaged or fallen off, and can extend the service life of the isolation layer 3.

[0067] In a specific embodiment, as Figure 3 shown, the thickness D2 of the electromagnetic induction layer 2 is 10 μm to 400 μm. D2 can specifically be 10 μm, 50 μm, 100 μm, 150 μm, 160 μm, 200 μm, 250 μm, 300 μm, 350 μm or 400 μm, or other values within the above range, and this embodiment does not limit this.

[0068] In this embodiment, if D2 is too small (for example, less than 10 μm), it will cause the power of the electromagnetic induction layer 2 to be too low, affecting the heating efficiency of the liquid heating container; if D2 is too large (for example, greater than 400 μm), it will cause the resistance of the electromagnetic induction layer 2 to increase, affecting the heating efficiency of the liquid heating container, and the electromagnetic induction layer 2 will also crack due to excessive internal stress. Therefore, when the thickness D2 of the electromagnetic induction layer 2 is 10 μm to 400 μm, it can not only improve the heating efficiency of the liquid heating container, but also be beneficial to extending the service life of the electromagnetic induction layer 2.

[0069] In a specific embodiment, the thermal expansion coefficient of the electromagnetic induction layer 2 is 5×10 -6 / °C to 10×10 -6 / °C, and can specifically be 5×10 -6 / °C, 5.5×10 -6 / °C, 6×10 -6 / °C, 6.5×10 -6 / °C, 7×10 -6 / °C, 7.5×10 -6 / °C, 8×10 -6 / °C, 8.5×10 -6 / °C, 9×10 -6 / °C, 9.5×10 -6 / °C or 10×10 -6 / °C, or other values within the above range, and this embodiment does not limit this.

[0070] In this embodiment, if the coefficient of thermal expansion of the electromagnetic induction layer 2 is too small (for example, less than 10×10 -6 / °C), the difference in the coefficient of thermal expansion from that of the integrated kettle body 1 and the isolation layer 3 will be too large, resulting in different expansion rates of the electromagnetic induction layer 2, the integrated kettle body 1, and the isolation layer 3 during heating. The electromagnetic induction layer 2 is prone to cracking or damage under stress; if the coefficient of thermal expansion of the electromagnetic induction layer 2 is too large (for example, greater than 10×10 -6 / °C), it will lead to a decrease in the thermal stability of the electromagnetic induction layer 2, and when its temperature rises, it is likely to cause cracking or damage to the isolation layer 3 and the integrated kettle body 1. Therefore, the coefficient of thermal expansion of the electromagnetic induction layer 2 is 5×10 -6 / °C to 10×10 -6 / °C, which can ensure the thermal stability of the electromagnetic induction layer 2 and reduce the risk of cracking or damage to the integrated kettle body 1, the electromagnetic induction layer 2, and the isolation layer 3.

[0071] In a specific embodiment, the porosity of the electromagnetic induction layer 2 is 5% to 8%, specifically, it can be 5%, 5.5%, 6%, 6.5%, 7%, 7.5%, or 8%, or other values within the above range. This embodiment does not limit this.

[0072] In this embodiment, if the porosity of the electromagnetic induction layer 2 is too small (for example, less than 5%), the overall electromagnetic induction layer 2 is prone to thermal expansion and deformation during heating, and the integrated kettle body 1 is prone to cracking or damage under the stress of the electromagnetic induction 2, affecting the service life of the integrated kettle body 1; if the porosity of the electromagnetic induction layer 2 is too large (for example, greater than 8%), the structure of the electromagnetic induction layer 2 will be too loose, with insufficient strength and stability, affecting the service life of the electromagnetic induction layer 2. Therefore, when the porosity of the electromagnetic induction layer 2 is 5% to 8%, it can ensure that the electromagnetic induction layer 2 is not prone to expansion and deformation, reduce the risk of damage to the integrated kettle body 1, extend the service life of the integrated kettle body 1, and ensure that the electromagnetic induction layer 2 has sufficient structural strength and stability, thus extending the service life of the electromagnetic induction layer 2.

[0073] In a specific embodiment, the resistivity of the electromagnetic induction layer 2 is 1×10 -6 Ω·m to 2×10 -6 Ω·m, specifically, it can be 1×10 -6 Ω·m, 1.2×10 -6 Ω·m, 1.4×10 -6 Ω·m, 1.6×10 -6 Ω·m, 1.8×10 -6 Ω·m, or 2×10 -6 Ω·m, or other values within the above range. This embodiment does not limit this.

[0074] Resistivity is a physical quantity used to represent the resistance characteristics of a substance. In this embodiment, if the resistivity of the electromagnetic induction layer 2 is too small (for example, less than 1×10 -6 Ω·m), the requirements for the material of the electromagnetic induction layer 2 are relatively high, and a pure metal with a very small resistivity needs to be used to make the electromagnetic induction layer 2, resulting in too high a manufacturing cost of the electromagnetic induction layer 2; if the resistivity of the electromagnetic induction layer 2 is too large (for example, greater than 2×10 -6 Ω·m), it will cause the conductivity of the electromagnetic induction layer 2 to decrease, affecting the heating efficiency of the liquid heating container. Therefore, when the resistivity of the electromagnetic induction layer 2 is 1×10 -6 Ω·m to 2×10 -6 Ω·m, it can not only improve the heating efficiency of the liquid heating container, but also appropriately reduce the manufacturing cost of the liquid heating container.

[0075] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A liquid heating container, characterized in that, Comprising: An integrated kettle body (1), the integrated kettle body (1) being made of a non-metallic material, the integrated kettle body (1) including a bottom wall (11), and an electromagnetic induction layer (2) being provided on the inner surface of the bottom wall (11); A base (4) for supporting the integrated kettle body (1), the base (4) being provided with an electromagnetic heating element (41) for cooperating with the electromagnetic induction layer (2); The integrated kettle body (1) is further provided with an isolation layer (3), and along the axial direction of the integrated kettle body (1), the isolation layer (3) completely covers the surface of the electromagnetic induction layer (2) on the side away from the bottom wall (11).

2. The liquid heating container according to claim 1, wherein The isolation layer (3) is a glass layer or a ceramic layer.

3. The liquid heating container according to claim 1, wherein, The thickness D1 of the isolation layer (3) is 0.1 mm to 0.5 mm.

4. The liquid heating container according to claim 1, wherein The porosity of the isolation layer (3) ≤ 0.5%.

5. The liquid heating container according to claim 1, wherein The thickness D2 of the electromagnetic induction layer (2) is 10 μm to 400 μm.

6. The liquid heating container according to claim 1, characterized in that, The porosity of the electromagnetic induction layer (2) is 5% to 8%.

7. The liquid heating container according to claim 1, wherein, The resistivity of the electromagnetic induction layer (2) is 1×10 -6 Ω·m to 2×10 -6 Ω·m.

8. The liquid heating container according to claim 1, wherein The coefficient of thermal expansion of the electromagnetic induction layer (2) is 5×10 -6 / °C to 10×10 -6 / °C.

9. The liquid heating container according to claim 1, wherein, The integrated kettle body (1) is made of ceramic material or glass material.

10. The liquid heating container according to any one of claims 1-9, characterized in that, At least a part of the bottom wall (11) bulges outward along the axial direction of the integrated kettle body (1) to form a mounting portion (12), and the electromagnetic induction layer (2) and the isolation layer (3) are located within the mounting portion (12); The base (4) is provided with a receiving groove (42) for receiving the mounting portion (12).

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