Glass container and cooking appliance

Abstract

The present invention provides a glass container and a cooking appliance. The glass container includes a side wall, a bottom plate, and a magnetic induction layer. The side wall surrounds and defines a receiving cavity having an opening. The bottom plate includes a first plane and a second plane, the first plane and the second plane are disposed opposite to each other, and the first plane is connected to the side wall so that the bottom plate closes the opening. The magnetic induction layer is disposed on the first plane or the second plane of the bottom plate, and the flatness tolerance range of the magnetic induction layer is from 0 micrometers to 15 micrometers. By disposing the magnetic induction layer on the first plane or the second plane of the bottom plate, the present invention realizes electromagnetic heating of the glass container, improves the heating efficiency of the glass container, and at the same time sets the flatness tolerance range of the magnetic induction layer to be from 0 micrometers to 15 micrometers, improves the uniformity of heat generation of the magnetic induction layer, enables the bottom plate to still be able to be used normally under a heating power greater than 1600 w, reduces the risk of cracking of the bottom plate due to uneven heating, and improves the thermal shock resistance of the glass container.

Description

Technical Field

[0001] The present invention relates to the technical field of cooking, and more particularly, to a glass container and a cooking appliance. Background Art

[0002] In the related art, glass containers are usually unevenly heated, resulting in large stress on the bottom plate and increasing the risk of cracking of the bottom plate. Summary of the Invention

[0003] The present invention aims to solve at least one of the above technical problems.

[0004] To this end, the first object of the present invention is to provide a glass container.

[0005] The second object of the present invention is to provide a glass container.

[0006] The third object of the present invention is to provide a glass container.

[0007] The fourth object of the present invention is to provide a cooking appliance.

[0008] To achieve the first object of the present invention, the technical solution of the present invention provides a glass container, comprising: a side wall surrounding and defining a receiving cavity with an opening; a bottom plate, the bottom plate including a first plane and a second plane, the first plane and the second plane being oppositely disposed, the first plane being connected to the side wall to close the opening; a magnetic induction layer disposed on the first plane or the second plane; and the flatness tolerance range of the magnetic induction layer is from 0 micrometers to 15 micrometers.

[0009] In this technical solution, the flatness tolerance range of the magnetic induction layer is from 0 micrometers to 15 micrometers, that is, the difference range between the maximum thickness and the minimum thickness of the magnetic induction layer is from 0 micrometers to 15 micrometers. Specifically, the maximum thickness and the minimum thickness of the magnetic induction layer can be measured by devices such as a microscope or a probe, so as to obtain the flatness tolerance of the magnetic induction layer.

[0010] In this technical solution, the magnetic induction layer is disposed on the first plane or the second plane of the bottom plate, realizing electromagnetic heating of the glass container, improving the heating efficiency of the glass container. At the same time, the flatness tolerance range of the magnetic induction layer is set from 0 micrometers to 15 micrometers, improving the uniformity of heat generation of the magnetic induction layer, thereby reducing the stress generated in the bottom plate during heating, enabling the bottom plate to still be able to be used normally under a heating power greater than 1600 w, reducing the risk of cracking of the bottom plate due to uneven heating, and improving the thermal shock resistance of the glass container.

[0011] In one of the technical solutions, the flatness tolerance range of the magnetic induction layer is less than 12 micrometers to further improve the flatness of the magnetic induction layer and reduce the cracking risk of the bottom plate.

[0012] In one of the technical solutions, the flatness tolerance range of the magnetic sensing layer is less than 10 microns. Understandably, in this technical solution, the flatness tolerance range of the magnetic sensing layer can be from 0 microns to 10 microns, which further improves the flatness of the magnetic sensing layer and reduces the risk of cracking of the bottom plate.

[0013] In addition, the technical solution provided by the above technical solution of the present invention may further have the following additional technical features:

[0014] In the above technical solution, the first plane has a first flatness tolerance, and the second plane has a second flatness tolerance; the flatness tolerance of the magnetic sensing layer is less than the first flatness tolerance; and / or the flatness tolerance of the magnetic sensing layer is less than the second flatness tolerance.

[0015] In this technical solution, the height difference between any two points on the first plane is the first flatness tolerance, and the height difference between any two points on the second plane is the second flatness tolerance. Specifically, the height difference between any two points on the first plane and the second plane can be measured by means of a microscope or a probe and other devices to obtain the first flatness tolerance and the second flatness tolerance.

[0016] In this technical solution, the flatness tolerance of the magnetic sensing layer is less than the first flatness tolerance and / or the second flatness tolerance, that is, the flatness of the magnetic sensing layer is higher than that of the first plane and / or the second plane. Since the magnetic sensing layer generates heat relatively quickly, the smaller the flatness tolerance of the magnetic sensing layer, the more uniform the heat generation of the magnetic sensing layer, further reducing the stress generated by the bottom plate when heated, thereby reducing the risk of cracking of the bottom plate due to uneven heating and improving the thermal shock resistance of the glass container. At the same time, by reducing the flatness tolerance of the magnetic sensing layer to reduce the stress generated by the bottom plate when heated, this technical solution can also reduce the flatness requirement for the bottom plate, thereby facilitating the processing and production of the bottom plate and reducing the cost of the glass container.

[0017] To achieve the second object of the present invention, the technical solution of the present invention provides a glass container, including: a side wall that surrounds and defines a receiving cavity with an opening; a bottom plate, the bottom plate includes a first plane and a second plane, the first plane is located on one side of the receiving cavity and is connected to the side wall to close the opening, and the second plane is on the side facing away from the receiving cavity and is disposed opposite to the first plane; wherein, the first plane has a first flatness tolerance, the second plane has a second flatness tolerance; a magnetic sensing layer, the magnetic sensing layer is disposed on the first plane, and the first flatness tolerance is less than the second flatness tolerance; or the magnetic sensing layer is disposed on the second plane, and the second flatness tolerance is less than the first flatness tolerance.

[0018] In this technical solution, the height difference between any two points on the first plane is the first flatness tolerance, and the height difference between any two points on the second plane is the second flatness tolerance. Specifically, the height difference between any two points on the first plane and the second plane can be measured by devices such as a microscope or a probe to obtain the first flatness tolerance and the second flatness tolerance.

[0019] In this technical solution, the magnetic sensing layer is disposed on the first plane or the second plane. When the magnetic sensing layer is disposed on the first plane, the first flatness tolerance is less than the second flatness tolerance, that is, the flatness of the first plane is higher than that of the second plane, increasing the thermal resistance when heat is transferred to the second plane, enabling the heat to be transferred to the accommodation cavity to the greatest extent, reducing the loss generated during the heat transfer process, and improving the thermal efficiency of the glass container.

[0020] When the magnetic sensing layer is disposed on the second plane, the second flatness tolerance is less than the first flatness tolerance, reducing the thermal resistance when heat is transferred to the accommodation cavity, thereby reducing the loss generated during the heat transfer, and at the same time enabling the bottom plate to be uniformly heated, reducing the stress generated when the bottom plate is heated, and thus reducing the risk of cracking of the bottom plate.

[0021] To achieve the third object of the present invention, the technical solution of the present invention provides a glass container, including: a side wall that surrounds and defines an accommodation cavity with an opening; a bottom plate, the bottom plate includes a first plane and a second plane, the first plane and the second plane are oppositely disposed, and the first plane is connected to the side wall to close the opening; wherein, the first plane has a first flatness tolerance, the second plane has a second flatness tolerance; a magnetic sensing layer, the magnetic sensing layer is disposed on the first plane, and the value range of the first flatness tolerance is from 0 mm to 0.15 mm; or the magnetic sensing layer is disposed on the second plane, and the value range of the second flatness tolerance is from 0 mm to 0.15 mm.

[0022] In this technical solution, the height difference between any two points on the first plane is the first flatness tolerance, and the height difference between any two points on the second plane is the second flatness tolerance. Specifically, the height difference between any two points on the first plane and the second plane can be measured by devices such as a microscope or a probe to obtain the first flatness tolerance and the second flatness tolerance.

[0023] In this technical solution, the magnetic sensing layer is disposed on the first plane or the second plane. When the magnetic sensing layer is disposed on the first plane, the flatness tolerance range of the first plane is from 0 mm to 0.15 mm. When the magnetic sensing layer is disposed on the second plane, the flatness tolerance range of the second plane is from 0 mm to 0.15 mm. The flatness tolerances of the first plane and the second plane are further reduced, making the first plane and the second plane smoother. On the one hand, it can improve the flatness of the magnetic sensing layer disposed on the first plane or the second plane, making the heat generation of the magnetic sensing layer more uniform, reducing the risk of the bottom plate cracking, and improving the thermal shock resistance of the glass container. On the other hand, by improving the flatness of the first plane and the second plane, the stress generated by the bottom plate during heating can be further reduced, the risk of the bottom plate cracking can be reduced, and the service reliability of the bottom plate can be improved.

[0024] In any of the above technical solutions, the glass container further includes: a connecting layer that connects the first plane and the side wall.

[0025] In this technical solution, the first plane and the side wall are connected by a connecting layer, which increases the firmness of the connection between the bottom plate and the side wall, prevents the bottom plate from falling off relative to the side wall during the heating process of the glass container, and improves the use safety of the glass container.

[0026] In any of the above technical solutions, the connecting layer is a glass connecting layer.

[0027] In this technical solution, the connecting layer is a glass connecting layer, which improves the hygienic safety of the glass container, reduces the risk of cracking and falling off of the connecting layer at the same time, and extends the service life of the glass container.

[0028] It can be understood that in this technical solution, the glass connecting layer can be a glass connecting layer formed when the bottom plate and the side wall are fusion welded, or a glass connecting layer formed by welding a borosilicate glass material with different compositions from the bottom plate and the side wall.

[0029] In any of the above technical solutions, the thickness range of the magnetic sensing layer is from 10 μm to 25 μm.

[0030] In this technical solution, the thickness of the magnetic sensing layer is from 10 μm to 25 μm, which reduces the thickness of the magnetic sensing layer, further improves the uniformity of heat generation of the magnetic sensing layer, and thus improves the thermal shock resistance of the glass container. Moreover, setting the thickness of the magnetic sensing layer to be from 10 μm to 25 μm can also increase the induction resistance of the magnetic sensing layer, thereby improving the heat generation efficiency of the magnetic sensing layer.

[0031] In any of the above technical solutions, when the thickness range of the magnetic sensing layer is less than or equal to the first preset thickness, the induction resistance of the magnetic sensing layer increases with the increase of the thickness of the magnetic sensing layer. When the thickness range of the magnetic sensing layer is greater than the first preset thickness, the induction resistance of the magnetic sensing layer decreases with the increase of the thickness of the magnetic sensing layer.

[0032] In this technical solution, when the thickness range of the magnetic induction layer is less than or equal to the first preset thickness, the induction resistance of the magnetic induction layer increases with the increase of the thickness of the magnetic induction layer, thereby improving the heat generation efficiency of the magnetic induction layer and reducing the energy consumption of the glass container. When the thickness range of the magnetic induction layer is greater than the first preset thickness, the induction resistance of the magnetic induction layer decreases with the increase of the thickness of the magnetic induction layer, avoiding excessive induction resistance of the magnetic induction layer, resulting in too high bottom plate stress and reducing the cracking risk of the bottom plate.

[0033] It can be understood that the first preset thickness in this technical solution can be 16 microns, 17 microns or 18 microns.

[0034] In any of the above technical solutions, the magnetic induction layer includes a weakly magnetic metal material.

[0035] Under an alternating magnetic field, an eddy current will be formed in the magnetic induction layer under the action of the alternating magnetic field, and heat will be generated by combining with the self-resistance of the magnetic induction layer to ensure the heating effect of the glass container.

[0036] Generally, the weakly magnetic metal material has strong oxidation and corrosion resistance. Therefore, after the weakly magnetic metal material is used in the slurry, coated on the substrate and sintered and cured, the weakly magnetic metal material can still maintain its original characteristics, that is, an eddy current will be formed under the action of the alternating magnetic field, and heat will be generated by combining with the self-resistance of the magnetic induction layer. Therefore, the magnetic induction layer using the weakly magnetic metal material ensures the heating effect of the glass container.

[0037] In any of the above technical solutions, the relative magnetic permeability range of the weakly magnetic metal material is 0 to 10.

[0038] In this technical solution, the relative magnetic permeability of the weakly magnetic metal material is related to the conductivity and oxidation and corrosion resistance of the weakly magnetic metal material. Specifically, the lower the relative magnetic permeability, the higher the corresponding conductivity, and at the same time, the stronger the oxidation and corrosion resistance. By limiting the relative magnetic permeability range of the weakly magnetic metal material to 0 to 10, that is, in a lower range, in order to improve the conductivity and oxidation and corrosion resistance of the weakly magnetic metal material, so that after the weakly magnetic metal material is used in the slurry, coated on the substrate and sintered and cured, the magnetic induction layer can still generate eddy current and has strong heat generation performance, ensuring the heating effect of the glass container.

[0039] In any of the above technical solutions, the relative magnetic permeability range of the weakly magnetic metal material is 0 to 1.

[0040] In this technical solution, the relative magnetic permeability range of the weakly magnetic metal material is further limited to 0 to 1. On the premise of improving the conductivity and oxidation and corrosion resistance of the weakly magnetic metal material, it is ensured that after the weakly magnetic metal material is used in the slurry, coated on the substrate and sintered and cured, the magnetic induction layer can still generate eddy current and has strong heat generation performance, ensuring the heating effect of the glass container.

[0041] In any of the above technical solutions, the weakly magnetic metal material includes one or a combination of the following metals: silver, aluminum or its alloy, copper or its alloy.

[0042] In this technical solution, the weakly magnetic metal material can be metallic silver, aluminum or its alloy, iron, and copper or its alloy. Among them, by defining that the weakly magnetic metal material includes the above-mentioned metal materials, the oxidation corrosion resistance and electrical conductivity of the magnetic sensing layer are improved, and the heating performance of the magnetic sensing layer is enhanced.

[0043] It can be understood that in this technical solution, the weakly magnetic metal material can be used in the slurry to be coated on the bottom plate, and a magnetic sensing layer is formed through sintering and curing. For example, at least one of silver, aluminum, and copper can be added to the glass glaze, coated on the bottom plate, and a magnetic sensing layer is formed through sintering and curing. The magnetic sensing layer includes inorganic substances and the aforementioned weakly magnetic metal material, and the inorganic substances include one or more of aluminum oxide, silicon oxide, boron oxide, potassium oxide, bismuth oxide, and calcium oxide.

[0044] In one of the technical solutions, the content of the weakly magnetic metal is 60% to 90%, and the content of the inorganic substance is 10% to 40%.

[0045] In one of the technical solutions, the weakly magnetic metal material can be sprayed on the bottom plate by spraying to form a magnetic sensing layer. For example, at least one of silver, aluminum, and copper can be applied to the bottom plate by thermal spraying or cold spraying to form a metal layer.

[0046] In any of the above technical solutions, the magnetic sensing layer can be a pure aluminum layer of the metal layer.

[0047] In any of the above technical solutions, the thickness range of the bottom plate is 1.5 mm to 3.5 mm.

[0048] In this technical solution, the thickness range of the bottom plate is 1.5 mm to 3.5 mm, avoiding the bottom plate being too thick, increasing the loss of energy during transmission and causing unnecessary energy waste, or the bottom plate being too thin, reducing the firmness of the glass container.

[0049] In any of the above technical solutions, the value range of the sheet resistance of the magnetic sensing layer is 0.1 mΩ to 5 mΩ.

[0050] In this technical solution, by defining that the magnetic sensing layer has a sheet resistance, so that under the action of an alternating magnetic field, the magnetic sensing layer can generate heat through this resistance, thereby improving the heating effect of the glass container.

[0051] In addition, the sheet resistance of the magnetic - sensitive layer ranges from 0.1 mΩ to 5 mΩ. By limiting the range of the sheet resistance of the magnetic - sensitive layer, the conductive energy of the magnetic - sensitive layer is improved, so that the magnetic - sensitive layer can heat the materials in the accommodation space with a relatively large power, thereby improving the heating efficiency of the materials in the accommodation space. In one of the technical solutions, the sheet resistance of the magnetic - sensitive layer ranges from 0.1 mΩ to 3.5 mΩ.

[0052] In this technical solution, the range of the sheet resistance of the magnetic - sensitive layer is further limited, ensuring that the glass container has a relatively large heating power, and thus improving the heating efficiency of the materials in the accommodation space.

[0053] In any of the above - mentioned technical solutions, the bottom plate is circular, square or polygonal.

[0054] In this technical solution, the bottom plate can be circular, square or polygonal, enabling the glass container to meet the usage requirements in different environments and improving the applicability of the glass container.

[0055] To achieve the fourth object of the present invention, the technical solution of the present invention provides a cooking appliance, including the glass container of any of the above - mentioned technical solutions, and thus having all the beneficial effects of any of the above - mentioned technical solutions, which will not be elaborated here.

[0056] In the above - mentioned technical solution, the cooking appliance further includes: an electromagnetic heating device, which is used to provide heat for the glass container.

[0057] In this technical solution, the electromagnetic heating device is used to provide heat for the glass container to heat or cook the food ingredients in the glass container.

[0058] The additional aspects and advantages of the present invention will become obvious in the following description part, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] The above - mentioned and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0060] Figure 1 is a schematic structural diagram of a glass container according to some embodiments of the present invention;

[0061] Figure 2 is one of the schematic structural diagrams of the bottom plate according to some embodiments of the present invention;

[0062] Figure 3 is another schematic structural diagram of the bottom plate according to some embodiments of the present invention;

[0063] Figure 4 is yet another schematic structural diagram of the bottom plate according to some embodiments of the present invention;

[0064] Figure 5 The fourth schematic diagram of the bottom plate structure according to some embodiments of the present invention;

[0065] Figure 6 The schematic block diagram of the cooking appliance structure according to some embodiments of the present invention.

[0066] Among them, Figures 1 to 6 The corresponding relationship between the reference numerals and the component names in the figures is as follows:

[0067] 100: glass container, 110: side wall, 120: accommodation cavity, 122: opening, 130: bottom plate, 132: first plane, 134: second plane, 140: connection layer, 150: magnetic sensing layer, 200: cooking appliance, 210: electromagnetic heating device. Detailed implementation manners

[0068] In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be further described in detail below with reference to the drawings and specific implementation manners. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

[0069] Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention may be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

[0070] Next, refer to Figures 1 to 6 to describe the glass container 100 and the cooking appliance 200 according to some embodiments of the present invention.

[0071] Embodiment 1:

[0072] As Figure 1 and Figure 2 shown, this embodiment provides a glass container 100, including a side wall 110, a bottom plate 130 and a magnetic sensing layer 150. The side wall 110 surrounds and defines an accommodation cavity 120 with an opening 122. The bottom plate 130 includes a first plane 132 and a second plane 134, and the first plane 132 and the second plane 134 are disposed opposite to each other. The first plane 132 is connected to the side wall 110 so that the bottom plate 130 closes the opening 122. The magnetic sensing layer 150 is disposed on the first plane 132 or the second plane 134. The flatness tolerance range of the magnetic sensing layer 150 is from 0 micrometers to 15 micrometers.

[0073] The glass container 100 in this embodiment may be a kettle or a water cup, etc., for holding solid or liquid food materials. In some implementation manners of this embodiment, the glass container 100 can be heated by a heating device so that the food materials in the glass container 100 are heated and cooked.

[0074] Specifically, the glass container 100 includes a side wall 110 that surrounds and defines a receiving cavity 120 having an opening 122. In some embodiments of the present embodiment, the number of openings 122 may be one or more, so that food ingredients can be placed in the receiving cavity 120 through the openings 122. The bottom plate 130 includes a first plane 132 and a second plane 134, and the first plane 132 and the second plane 134 are disposed opposite to each other.

[0075] It can be understood that the bottom plate 130 is a flat plate-like structure. The first plane 132 is connected to the side wall 110 so that the bottom plate 130 can close the opening 122 and prevent the food ingredients in the receiving cavity 120 from leaking through the opening 122. It can be understood that the first plane 132 is the inner surface of the glass container 100, and the second plane 134 is the bottom surface of the glass container 100. The area of the first plane 132 is greater than or equal to the area of the opening 122.

[0076] In some embodiments of the present embodiment, the bottom plate 130 has the same shape as the opening 122 to improve the structural regularity of the glass container 100.

[0077] In some other embodiments of the present embodiment, the receiving cavity 120 may include two openings 122, and the bottom plate 130 closes any one of the openings 122.

[0078] In this embodiment, the flatness tolerance range of the magnetic sensing layer 150 is from 0 micrometers to 15 micrometers, that is, the difference between the maximum thickness and the minimum thickness of the magnetic sensing layer 150 is in the range of 0 micrometers to 15 micrometers, making the magnetic sensing layer 150 more uniform, thereby improving the uniformity of heat generation of the magnetic sensing layer 150. Specifically, the maximum thickness and the minimum thickness of the magnetic sensing layer 150 can be measured by devices such as a microscope or a probe, so as to obtain the flatness tolerance of the magnetic sensing layer 150.

[0079] In some embodiments of the present embodiment, the magnetic sensing layer can be disposed on the first plane 132 or the second plane 134 by processes such as spraying.

[0080] In this embodiment, by disposing the magnetic sensing layer 150 on the first plane 132 or the second plane 134 of the bottom plate 130, electromagnetic heating of the glass container 100 is realized, the heating efficiency of the glass container 100 is improved. At the same time, the flatness tolerance range of the magnetic sensing layer 150 is set to be from 0 micrometers to 15 micrometers, improving the uniformity of heat generation of the magnetic sensing layer 150, thereby reducing the stress generated in the bottom plate 130 during the heating process, enabling the bottom plate 130 to still be able to be used normally under a heating power greater than 1600 w, reducing the risk of cracking of the bottom plate 130 due to uneven heating, and improving the thermal shock resistance of the glass container 100.

[0081] In some embodiments of the present embodiment, the flatness tolerance range of the magnetic sensing layer 150 can be from 0 micrometers to 10 micrometers, further improving the flatness of the magnetic sensing layer 150 and reducing the risk of cracking of the bottom plate 130.

[0082] It can be understood that in this embodiment, the flatness tolerance of the magnetic sensing layer 150 can be 5 micrometers, 8 micrometers, or 12 micrometers.

[0083] Embodiment 2:

[0084] As Figure 2 and Figure 3 shown, this embodiment provides a glass container 100, which further includes the following technical features in addition to the technical features of the above Embodiment 1.

[0085] The first plane 132 has a first flatness tolerance, and the second plane 134 has a second flatness tolerance. The flatness tolerance of the magnetic sensing layer 150 is less than the first flatness tolerance; and / or the flatness tolerance of the magnetic sensing layer 150 is less than the second flatness tolerance.

[0086] In this embodiment, the height difference between any two points on the first plane 132 is the first flatness tolerance, and the height difference between any two points on the second plane 134 is the second flatness tolerance. It can be understood that the first flatness tolerance and the second flatness tolerance can be the same or different. Specifically, the height difference between any two points on the first plane 132 and the second plane 134 can be measured by devices such as a microscope or a probe to obtain the first flatness tolerance and the second flatness tolerance.

[0087] As Figure 4 shown, in this embodiment, the flatness tolerance of the magnetic sensing layer 150 is less than the first flatness tolerance and / or the second flatness tolerance, that is, the flatness of the magnetic sensing layer 150 is higher than that of the first plane 132 and / or the second plane 134. Since the magnetic sensing layer 150 generates heat relatively quickly, the smaller the flatness tolerance of the magnetic sensing layer 150, the more uniform the heat generation of the magnetic sensing layer 150, further reducing the stress generated by the bottom plate 130 when heated, thereby reducing the risk of cracking of the bottom plate 130 due to uneven heating and improving the thermal shock resistance of the glass container 100.

[0088] At the same time, by reducing the flatness tolerance of the magnetic sensing layer 150 to reduce the stress generated by the bottom plate 130 when heated, the requirement for the flatness of the bottom plate 130 can also be reduced, thereby facilitating the processing and production of the bottom plate 130 and reducing the cost of the glass container 100.

[0089] In some embodiments of the present embodiment, in some embodiments of the present embodiment, the value range of the first flatness tolerance is from 0 millimeters to 0.15 millimeters.

[0090] In some implementations of this embodiment, the second flatness tolerance ranges from 0 mm to 0.15 mm.

[0091] In some implementations of this embodiment, the first flatness tolerance and the second flatness tolerance may be the same or different.

[0092] It can be understood that the flatness tolerance of the first plane 132 can be 0.3 mm, 0.8 mm or 0.12 mm, and the flatness tolerance of the second plane 134 can be 0.3 mm, 0.8 mm or 0.12 mm.

[0093] Embodiment 3:

[0094] like Figure 1 and Figure 2 As shown, this embodiment provides a glass container 100, including: a side wall 110, a bottom plate 130 and a magnetically sensitive layer 150. The side wall 110 surrounds and defines a receiving cavity 120 having an opening 122. The bottom plate 130 includes a first plane 132 and a second plane 134, wherein the first plane 132 is located at one side of the receiving cavity 120 and is connected to the side wall 110 so that the bottom plate 130 closes the opening 122, and the second plane 134 is away from one side of the receiving cavity 120 and is arranged opposite to the first plane 132. The first plane 132 has a first flatness tolerance, and the second plane 134 has a second flatness tolerance. The magnetically sensitive layer 150 is arranged on the first plane 132, and the first flatness tolerance is less than the second flatness tolerance; or the magnetically sensitive layer 150 is arranged on the second plane 134, and the second flatness tolerance is less than the first flatness tolerance.

[0095] The glass container 100 in this embodiment can be a kettle or a cup, etc., for holding solid or liquid food. In some implementations of this embodiment, the glass container 100 can be heated by a heating device so that the food in the glass container 100 is heated and cooked.

[0096] Specifically, the glass container 100 includes a side wall 110, and the side wall 110 surrounds and defines a receiving cavity 120 having an opening 122. In some implementations of this embodiment, the number of the opening 122 may be one or more, so that food can be placed in the receiving cavity 120 through the opening 122. The bottom plate 130 includes a first plane 132 and a second plane 134, and the first plane 132 and the second plane 134 are arranged opposite to each other.

[0097] Understandably, the bottom plate 130 is a flat plate-like structure. The first plane 132 is connected to the side wall 110 so that the bottom plate 130 can close the opening 122 and prevent the food ingredients in the accommodation cavity 120 from leaking through the opening 122. Understandably, the first plane 132 is the inner surface of the glass container 100, and the second plane 134 is the bottom surface of the glass container 100. The area of the first plane 132 is greater than or equal to the area of the opening 122.

[0098] In some embodiments of the present embodiment, the bottom plate 130 has the same shape as the opening 122 to improve the structural regularity of the glass container 100.

[0099] In some other embodiments of the present embodiment, the accommodation cavity 120 may include two openings 122, and the bottom plate 130 closes any one of the openings 122.

[0100] In this embodiment, the first plane 132 has a first flatness tolerance, and the second plane 134 has a second flatness tolerance. The height difference between any two points on the first plane 132 is the first flatness tolerance, and the height difference between any two points on the second plane 134 is the second flatness tolerance. Specifically, a device such as a microscope or a probe can be used to measure the height difference between any two points on the first plane 132 and the second plane 134 to obtain the first flatness tolerance and the second flatness tolerance.

[0101] The magnetic sensing layer 150 is disposed on the first plane 132 or the second plane 134. When the magnetic sensing layer 150 is disposed on the first plane 132, the first flatness tolerance is less than the second flatness tolerance, that is, the flatness of the first plane 132 is higher than that of the second plane 134. With such a design, the magnetic sensing layer 150 can be directly in contact with the food ingredients located in the accommodation cavity 120, and most of the heat generated by the magnetic sensing layer 150 is transferred into the accommodation cavity 120 to heat the food ingredients, so that the glass container 100 has a high heating power. Since the heat generated by the magnetic sensing layer 150 will also be transferred to the bottom plate 130, by defining that the first flatness tolerance is less than the second flatness tolerance, that is, the first plane 132 is relatively flat, it is ensured that the magnetic sensing layer 150 is relatively uniform in thickness and its heat transfer efficiency is improved.

[0102] In addition, since most of the heat generated by the magnetic sensing layer 150 is transferred into the accommodation cavity 120, the loss of heat generated during the transfer process is reduced, and the thermal efficiency of the glass container 100 is improved.

[0103] When the magnetic sensing layer 150 is disposed on the second plane 134, the heat generated by the magnetic sensing layer 150 will be transferred to the accommodation cavity through the bottom plate 130 to heat the food ingredients located in the accommodation cavity. Since the unevenness of the bottom plate 130 will exacerbate the differences in various parts of the bottom plate 130 and increase the thermal stress, by defining that the second flatness tolerance is less than the first flatness tolerance, it is ensured that the first plane in contact with the food ingredients is flatter, reducing the thermal stress, while reducing the thermal resistance when the heat is transferred to the accommodation cavity 120, ultimately reducing the loss generated during the heat transfer, and at the same time enabling the bottom plate 130 to be uniformly heated, thereby reducing the risk of cracking of the bottom plate 130.

[0104] In some embodiments of the present embodiment, the first flatness tolerance and the second flatness tolerance may be the same or different.

[0105] In some other embodiments of the present embodiment, the magnetic sensing layer 150 may be disposed on the first plane 132 or the second plane 134 through processes such as spraying.

[0106] In some embodiments of the present embodiment, the flatness tolerance range of the magnetic sensing layer is from 0 micrometers to 15 micrometers, that is, the difference range between the maximum thickness and the minimum thickness of the magnetic sensing layer is from 0 micrometers to 15 micrometers. Specifically, the maximum thickness and the minimum thickness of the magnetic sensing layer can be measured by devices such as a microscope or a probe, and finally the flatness tolerance of the magnetic sensing layer is determined.

[0107] In this embodiment, by defining the flatness tolerance range of the magnetic sensing layer to be from 0 micrometers to 15 micrometers, the uniformity of heat generation of the magnetic sensing layer is improved, thereby reducing the stress generated in the bottom plate during the heating process, enabling the bottom plate to still be able to be used normally under a heating power greater than 1600 w, reducing the risk of cracking of the bottom plate due to uneven heating, and improving the thermal shock resistance of the glass container.

[0108] In some embodiments of the present embodiment, the flatness tolerance range of the magnetic sensing layer is less than 12 micrometers to further improve the flatness of the magnetic sensing layer and reduce the cracking risk of the bottom plate.

[0109] In some embodiments of the present embodiment, the flatness tolerance range of the magnetic sensing layer is less than 10 micrometers. It can be understood that the flatness tolerance range of the magnetic sensing layer in this embodiment can be from 0 micrometers to 10 micrometers, further improving the flatness of the magnetic sensing layer and reducing the cracking risk of the bottom plate.

[0110] In some embodiments of the present embodiment, the value range of the first flatness tolerance is from 0 millimeters to 0.15 millimeters.

[0111] In some embodiments of the present embodiment, the value range of the second flatness tolerance is from 0 millimeters to 0.15 millimeters.

[0112] In some embodiments of this embodiment, the first flatness tolerance and the second flatness tolerance may be the same or different.

[0113] Understandably, the flatness tolerance of the first plane 132 may be 0.3 mm, 0.8 mm, or 0.12 mm, and the flatness tolerance of the second plane 134 may be 0.3 mm, 0.8 mm, or 0.12 mm.

[0114] Example 4:

[0115] As Figure 1 and Figure 2 shown, this embodiment provides a glass container 100, including a side wall 110, a bottom plate 130, and a magnetic sensing layer 150. The side wall 110 surrounds and defines a receiving cavity 120 with an opening 122. The bottom plate 130 includes a first plane 132 and a second plane 134, the first plane 132 and the second plane 134 are oppositely arranged, and the first plane 132 is connected to the side wall 110 so that the bottom plate 130 closes the opening 122. Among them, the first plane 132 has a first flatness tolerance, and the second plane 134 has a second flatness tolerance. The magnetic sensing layer 150 is disposed on the first plane 132, and the value range of the first flatness tolerance is from 0 mm to 0.15 mm; or the magnetic sensing layer 150 is disposed on the second plane 134, and the value range of the second flatness tolerance is from 0 mm to 0.15 mm.

[0116] The glass container 100 in this embodiment may be a kettle or a water cup, etc., for holding solid or liquid food materials. In some embodiments of this embodiment, the glass container 100 can be heated by a heating device so that the food materials in the glass container 100 are heated and cooked.

[0117] Specifically, the glass container 100 includes a side wall 110, and the side wall 110 surrounds and defines a receiving cavity 120 with an opening 122. In some embodiments of this embodiment, the number of openings 122 may be one or more so that food materials can be placed in the receiving cavity 120 through the opening 122. The bottom plate 130 includes a first plane 132 and a second plane 134, and the first plane 132 and the second plane 134 are oppositely arranged.

[0118] Understandably, the bottom plate 130 is a flat plate-like structure. The first plane 132 is connected to the side wall 110 so that the bottom plate 130 can close the opening 122 and prevent the food materials in the receiving cavity 120 from leaking through the opening 122. Understandably, the first plane 132 is the inner surface of the glass container 100, and the second plane 134 is the bottom surface of the glass container 100. The area of the first plane 132 is greater than or equal to the area of the opening 122.

[0119] In some embodiments of the present embodiment, the bottom plate 130 has the same shape as the opening 122 to improve the structural regularity of the glass container 100.

[0120] In some other embodiments of the present embodiment, the accommodating cavity 120 may include two openings 122, and the bottom plate 130 closes any one of the openings 122.

[0121] In some embodiments of the present embodiment, the magnetic sensing layer 150 can be disposed on the first plane 132 or the second plane 134 through processes such as spraying.

[0122] In this embodiment, the magnetic sensing layer 150 is disposed on the first plane 132 or the second plane 134. The height difference between any two points on the first plane 132 is the first flatness tolerance, and the height difference between any two points on the second plane 134 is the second flatness tolerance. Specifically, the height difference between any two points on the first plane 132 and the second plane 134 can be measured by devices such as a microscope or a probe to obtain the first flatness tolerance and the second flatness tolerance. When the magnetic sensing layer 150 is disposed on the first plane 132, the flatness tolerance range of the first plane 132 is from 0 mm to 0.15 mm. When the magnetic sensing layer 150 is disposed on the second plane 134, the flatness tolerance range of the second plane 134 is from 0 mm to 0.15 mm. Further reducing the flatness tolerances of the first plane 132 and the second plane 134 enables the first plane 132 and the second plane 134 to be flatter. On the one hand, it can improve the flatness of the magnetic sensing layer 150 disposed on the first plane 132 or the second plane 134, making the heat generation of the magnetic sensing layer 150 more uniform, reducing the risk of cracking of the bottom plate 130, and improving the thermal shock resistance of the glass container 100. On the other hand, by improving the flatness of the first plane 132 and the second plane 134, the stress generated by the bottom plate 130 when heated can be further reduced, the risk of cracking of the bottom plate 130 can be reduced, and the service reliability of the bottom plate 130 can be improved.

[0123] In some embodiments of the present embodiment, the first flatness tolerance and the second flatness tolerance may be the same or different.

[0124] It can be understood that the flatness tolerance of the first plane 132 can be 0.3 mm, 0.8 mm or 0.12 mm, and the flatness tolerance of the second plane 134 can be 0.3 mm, 0.8 mm or 0.12 mm.

[0125] In some embodiments of the present embodiment, the flatness tolerance range of the magnetic sensing layer is from 0 μm to 15 μm, that is, the difference range between the maximum thickness and the minimum thickness of the magnetic sensing layer is from 0 μm to 15 μm. Specifically, the maximum thickness and the minimum thickness of the magnetic sensing layer can be measured by devices such as a microscope or a probe, and finally the flatness tolerance of the magnetic sensing layer can be determined.

[0126] In this embodiment, by defining the flatness tolerance range of the magnetic induction layer to be from 0 micrometers to 15 micrometers, the uniformity of heat generation of the magnetic induction layer is improved, thereby reducing the stress generated in the bottom plate during the heating process, enabling the bottom plate to still be used normally under a heating power greater than 1600 w, reducing the risk of cracking of the bottom plate due to uneven heating, and improving the thermal shock resistance of the glass container.

[0127] In some implementation manners of this embodiment, the flatness tolerance range of the magnetic induction layer is less than 12 micrometers to further improve the flatness of the magnetic induction layer and reduce the cracking risk of the bottom plate.

[0128] In some implementation manners of this embodiment, the flatness tolerance range of the magnetic induction layer is less than 10 micrometers. It can be understood that the flatness tolerance range of the magnetic induction layer in this embodiment can be from 0 micrometers to 10 micrometers, further improving the flatness of the magnetic induction layer and reducing the cracking risk of the bottom plate.

[0129] Embodiment 5:

[0130] As Figure 1 shown, this embodiment provides a glass container 100. In addition to the technical features of any of the above embodiments, this embodiment further includes the following technical features.

[0131] The glass container 100 further includes a connection layer 140. The connection layer 140 connects the first plane 132 and the side wall 110.

[0132] In this embodiment, the first plane 132 and the side wall 110 are connected through the connection layer 140, which increases the firmness of the connection between the bottom plate 130 and the side wall 110, prevents the bottom plate 130 from detaching from the side wall 110 during the heating process of the glass container 100, and improves the use safety of the glass container 100.

[0133] Embodiment 6:

[0134] As Figure 1 shown, this embodiment provides a glass container 100. In addition to the technical features of any of the above embodiments, this embodiment further includes the following technical features.

[0135] The connection layer 140 is a glass connection layer 140.

[0136] In this embodiment, the connection layer 140 is a glass connection layer 140, which improves the hygienic safety of the glass container 100, reduces the risk of cracking and detachment of the connection layer 140 at the same time, and extends the service life of the glass container 100.

[0137] Understandably, in this embodiment, the glass connection layer 140 can be the glass connection layer 140 formed during the fusion welding of the bottom plate 130 and the side wall 110, or can be a borosilicate glass material with a composition different from that of the bottom plate 130 and the side wall 110, and the formed glass connection layer 140.

[0138] In some embodiments of this embodiment, the connection layer 140 can be a low-temperature glass paste, coated on the bottom plate 130, and after sintering, a fixed connection between the bottom plate 130 and the side wall 110 is achieved, with simple operation, easy to implement, and the cost of the glass container 100 is reduced.

[0139] Embodiment 7:

[0140] As Figure 5 shown, this embodiment provides a glass container 100. In addition to the technical features of any of the above embodiments, this embodiment further includes the following technical features. The thickness range of the magnetic induction layer 150 is 10 microns to 25 microns.

[0141] In this embodiment, the thickness of the magnetic induction layer 150 is 10 microns to 25 microns, reducing the thickness of the magnetic induction layer 150, further improving the uniformity of heat generation of the magnetic induction layer 150, thereby improving the thermal shock resistance of the glass container 100. Moreover, setting the thickness of the magnetic induction layer 150 to 10 microns to 25 microns can also increase the induction resistance of the magnetic induction layer 150, thereby improving the heat generation efficiency of the magnetic induction layer 150.

[0142] In some embodiments of this embodiment, the thickness of the magnetic induction layer 150 can be 12 microns, 15 microns, or 20 microns.

[0143] Embodiment 8:

[0144] As Figure 5 shown, this embodiment provides a glass container 100. In addition to the technical features of any of the above embodiments, this embodiment further includes the following technical features.

[0145] When the thickness range of the magnetic induction layer 150 is less than or equal to the first preset thickness, the induction resistance of the magnetic induction layer 150 increases with the increase of the thickness of the magnetic induction layer 150. When the thickness range of the magnetic induction layer 150 is greater than the first preset thickness, the induction resistance of the magnetic induction layer 150 decreases with the increase of the thickness of the magnetic induction layer 150.

[0146] In this embodiment, when the thickness range of the magnetic induction layer 150 is less than or equal to the first preset thickness, the induction resistance of the magnetic induction layer 150 increases with the increase of the thickness of the magnetic induction layer 150, thereby improving the heat generation efficiency of the magnetic induction layer 150 and reducing the energy consumption of the glass container 100. When the thickness range of the magnetic induction layer 150 is greater than the first preset thickness, the induction resistance of the magnetic induction layer 150 decreases with the increase of the thickness of the magnetic induction layer 150, avoiding excessive induction resistance of the magnetic induction layer 150, resulting in too high stress on the bottom plate 130 and reducing the cracking risk of the bottom plate 130.

[0147] It can be understood that in this embodiment, the first preset thickness can be 16 microns, 17 microns or 18 microns.

[0148] Embodiment 9:

[0149] As Figure 5 shown, this embodiment provides a glass container 100. In addition to the technical features of any of the above embodiments, this embodiment further includes the following technical features.

[0150] The magnetic induction layer 150 includes a weakly magnetic metal material.

[0151] In this embodiment, under an alternating magnetic field, an eddy current will be formed in the magnetic induction layer 150 under the action of the alternating magnetic field, and heat will be generated by combining with the self-resistance of the magnetic induction layer 150 to ensure the heating effect of the glass container 100.

[0152] Generally, the weakly magnetic metal material has strong oxidation and corrosion resistance. Therefore, after using the weakly magnetic metal material in the slurry, coating it on the substrate and sintering and curing it, the weakly magnetic metal material can still maintain its original properties, that is, an eddy current will be formed under the action of an alternating magnetic field, and heat will be generated by combining with the self-resistance of the magnetic induction layer. Therefore, the magnetic induction layer 150 using the weakly magnetic metal material ensures the heating effect of the glass container 100.

[0153] Embodiment 10:

[0154] As Figure 5 shown, this embodiment provides a glass container 100. In addition to the technical features of any of the above embodiments, this embodiment further includes the following technical features.

[0155] The relative magnetic permeability range of the weakly magnetic metal material is from 0 to 10.

[0156] In this embodiment, the relative magnetic permeability of the weakly magnetic metal material is related to the conductivity and oxidation corrosion resistance of the weakly magnetic metal material. Specifically, the lower the relative magnetic permeability, the higher the corresponding conductivity, and at the same time, the stronger the oxidation corrosion resistance. By limiting the relative magnetic permeability range of the weakly magnetic metal material to 0 to 10, that is, in a relatively low range, the conductivity and oxidation corrosion resistance of the weakly magnetic metal material can be improved. After the weakly magnetic metal material is used in the slurry, coated on the substrate and sintered and cured, the magnetic sensing layer can still generate eddy current and has strong heat generation performance, ensuring the heating effect of the glass container 100.

[0157] Example 11:

[0158] As Figure 5 shown, this embodiment provides a glass container 100. In addition to the technical features of any of the above embodiments, this embodiment further includes the following technical features.

[0159] The relative magnetic permeability range of the weakly magnetic metal material is 0 to 1.

[0160] In this embodiment, the relative magnetic permeability range of the weakly magnetic metal material is further limited to 0 to 1. On the premise of improving the conductivity and oxidation corrosion resistance of the weakly magnetic metal material, it is ensured that after the weakly magnetic metal material is used in the slurry, coated on the substrate and sintered and cured, the magnetic sensing layer can still generate eddy current and has strong heat generation performance, ensuring the heating effect of the glass container 100.

[0161] Example 12:

[0162] As Figure 5 shown, this embodiment provides a glass container 100. In addition to the technical features of any of the above embodiments, this embodiment further includes the following technical features.

[0163] The weakly magnetic metal material includes metallic silver, aluminum or its alloy, copper or its alloy.

[0164] In this embodiment, the weakly magnetic metal material can be metallic silver, aluminum or its alloy, iron and copper or its alloy. Among them, by limiting the weakly magnetic metal material to include the above metal materials, the oxidation corrosion resistance and conductivity of the magnetic sensing layer can be improved, and the heating performance of the magnetic sensing layer 150 is improved.

[0165] It can be understood that in this embodiment, the weakly magnetic metal material can be used in the slurry to be coated on the bottom plate, and the magnetic sensing layer 150 is formed by sintering and curing. For example, at least one of silver, aluminum, and copper can be added to the glass glaze, coated on the bottom plate and sintered and cured to form the magnetic sensing layer 150, where the magnetic sensing layer 150 includes inorganic substances and the aforementioned weakly magnetic metal material, and the inorganic substances include one or more of aluminum oxide, silicon oxide, boron oxide, potassium oxide, bismuth oxide, and calcium oxide.

[0166] In one embodiment, the content of the weakly magnetic metal is 60% to 90%, and the content of the inorganic substance is 10% to 40%.

[0167] In one embodiment, the weakly magnetic metal material can be sprayed on the bottom plate by spraying to form the magnetic induction layer 150. For example, at least one of silver, aluminum, and copper can be applied to the bottom plate by thermal spraying or cold spraying to form a metal layer.

[0168] In any of the above embodiments, the magnetic induction layer can be a pure aluminum layer of the metal layer.

[0169] Embodiment 13:

[0170] Such as Figure 3 and Figure 5 As shown, this embodiment provides a glass container 100. In addition to the technical features of any of the above embodiments, this embodiment further includes the following technical features.

[0171] The thickness range of the bottom plate 130 is 1.5 mm to 3.5 mm.

[0172] In this embodiment, the thickness range of the bottom plate 130 is 1.5 mm to 3.5 mm, avoiding the bottom plate 130 being too thick, increasing the loss of energy during transmission, or the bottom plate 130 being too thin, reducing the firmness of the glass container 100.

[0173] In some embodiments of this embodiment, the thickness of the bottom plate 130 can be 2.0 mm, 2.5 mm, or 3.0 mm.

[0174] Embodiment 14:

[0175] Such as Figure 4 As shown, this embodiment provides a glass container 100. In addition to the technical features of any of the above embodiments, this embodiment further includes the following technical features.

[0176] The value range of the sheet resistance of the magnetic induction layer is 0.1 mΩ to 5 mΩ.

[0177] In this embodiment, by defining that the magnetic induction layer has a sheet resistance, so that under the action of an alternating magnetic field, the magnetic induction layer can generate heat through this resistance, thereby improving the heating effect of the glass container.

[0178] In addition, the value range of the sheet resistance of the magnetic induction layer is 0.1 mΩ to 5 mΩ. By limiting the value range of the sheet resistance of the magnetic induction layer, the conductivity of the magnetic induction layer is improved, so that the magnetic induction layer can heat the material in the accommodation space with a larger power, thereby improving the heating efficiency of the material in the accommodation space.

[0179] In some embodiments of the present embodiment, the sheet resistance of the magnetic-sensitive layer ranges from 0.1 mΩ to 3.5 mΩ.

[0180] In this embodiment, the range of the sheet resistance of the magnetic-sensitive layer is further defined, ensuring that the glass container has a relatively large heating power, thereby improving the heating efficiency of the material in the accommodating space.

[0181] This embodiment further includes the following technical features. The bottom plate 130 is circular, square or polygonal. In this embodiment, the bottom plate 130 can be circular, square or polygonal, enabling the glass container 100 to meet the usage requirements in different environments and improving the applicability of the glass container 100.

[0182] Example 15:

[0183] This embodiment provides a glass container 100. In addition to the technical features of any of the above embodiments, this embodiment further includes the following technical features.

[0184] The magnetic-sensitive layer 150 further includes: inorganic substances. Among them, the content of the weakly magnetic metal material in the magnetic-sensitive layer is between 60% and 90%, and the content of the inorganic substances is between 10% and 40%.

[0185] In some embodiments of the present embodiment, the magnetic-sensitive layer 150 can be a silver paste layer or a pure aluminum layer. The silver paste layer includes inorganic substances and a weakly magnetic metal material. Among them, the weakly magnetic metal material can be metallic silver, and the inorganic substances include one or more of aluminum oxide, silicon oxide, boron oxide, bismuth oxide and calcium oxide. In the silver paste layer, the content of metallic silver is 60% to 90%, and the content of the inorganic substances is 10% to 40%.

[0186] Example 16:

[0187] As Figure 6 shown, this embodiment provides a cooking appliance 200, including the glass container 100 of any of the above embodiments, and thus has all the beneficial effects of any of the above embodiments, which will not be elaborated here.

[0188] In some embodiments of the present embodiment, the cooking appliance 200 can be an electric kettle, a coffee machine, a soymilk machine or a food processor, etc., for heating or cooking food ingredients.

[0189] Example 17:

[0190] As Figure 6 shown, this embodiment provides a cooking appliance 200. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0191] The cooking appliance 200 further includes an electromagnetic heating device 210 for providing heat to the glass container 100.

[0192] In this embodiment, the cooking appliance 200 further includes an electromagnetic heating device 210 for providing heat to the glass container 100 to heat or cook the food ingredients in the glass container 100.

[0193] Embodiment 18:

[0194] For the cooking appliances in the related art, taking a glass electric kettle as an example, it is usually of an integrated structure, and the inner side of the bottom plate cannot be ground flat, resulting in poor flatness of the inner side of the bottom plate, affecting the heating power of the electric kettle, increasing the time consumed for boiling water, and reducing the user experience.

[0195] Moreover, due to the unevenness of the inner side of the bottom plate of the electric kettle in the related art, during the heating process, the thick part has a large thermal resistance, the heat is concentrated, and the temperature is high, while the thin part has a slightly smaller thermal resistance and a lower temperature. As a result, there is a large temperature difference across the entire bottom plate, and the resulting stress is relatively large, increasing the risk of cracking of the bottom plate.

[0196] To solve the above problems in the related art, this embodiment provides a cooking appliance 200 including an electromagnetic heating device 210 and a glass container 100. It can be understood that the cooking appliance 200 in this embodiment can be an electric kettle, the glass container 100 can be a glass kettle, and the electromagnetic heating device 210 can be electromagnetic induction heating.

[0197] As Figure 1 and Figure 2 shown, the glass container 100 in this embodiment includes a side wall 110 and a bottom plate 130. Specifically, in this embodiment, the bottom plate 130 is an independent circular glass plate, the side wall 110 is a glass kettle body, the bottom plate 130 is connected to the kettle body through a welding process, and a magnetic induction layer 150 is provided on the bottom plate 130.

[0198] In this embodiment, by using an independent glass bottom plate 130 with high processing performance and in combination with the working conditions requirements of the cooking appliance 200, both the first plane 132 and the second plane 134 of the bottom plate 130 can be ground flat, and the flatness tolerance of the first plane 132 and the second plane 134 is less than 0.15 mm, that is, the height difference between any two points on the same plane is less than 0.15 mm, making the bottom plate 130 smoother and flatter. Thus, during the heating process, it can be heated evenly, and the resulting stress is smaller, thereby reducing the risk of cracking of the bottom plate 130 due to heating.

[0199] As Figure 4 and Figure 5As shown, in this embodiment, by providing a magnetic sensing layer 150 on the bottom plate 130, electromagnetic heating of the cooking appliance 200 is achieved, improving the heating efficiency of the cooking appliance 200. At the same time, it is easy to control the heating temperature, ensuring the performance of the cooking appliance 200.

[0200] In this embodiment, the flatness tolerance of the magnetic sensing layer 150 is less than 15 microns, that is, the difference range between the maximum thickness and the minimum thickness of the magnetic sensing layer 150 is from 0 micron to 15 microns, making the magnetic sensing layer 150 more uniform. Thereby, the uniformity of heat generation of the magnetic sensing layer 150 is improved, the risk of cracking of the bottom plate 130 due to uneven heat absorption is reduced, and the thermal shock resistance of the glass container 100 is improved.

[0201] In this embodiment, the side wall 110 is connected to the bottom plate 130 through a low-temperature glass paste, and a connection layer 140 is formed through coating and firing, reducing the risk of the bottom plate 130 falling off relative to the side wall 110, and at the same time improving the hygienic safety of the glass electric kettle.

[0202] In this embodiment, the thickness range of the bottom plate 130 is from 1.5 mm to 3.5 mm, avoiding the situation that the thickness of the bottom plate 130 is too small, resulting in insufficient strength of the glass container 100, or the thickness of the glass bottom plate 130 is too large, affecting the heating efficiency.

[0203] In this embodiment, the thickness range of the magnetic sensing layer 150 is set to be from 10 microns to 25 microns, so that the heating power of the electric kettle can reach from 1500 W to 1800 W, further improving the heating efficiency of the electric kettle.

[0204] Specifically, taking the usage environments of 1500 W and 1800 W as examples, under different flatness of the bottom plate 130, and when the magnetic sensing layer 150 is arranged inside the accommodating cavity 120 and the flatness of the magnetic sensing layer 150 takes different values, the usage conditions of the bottom plate 130 are shown in Table 1.

[0205] Table 1

[0206]

[0207] In some embodiments of this embodiment, the material of the magnetic sensing layer 150 is a silver film, thereby ensuring that the stress during the heat generation process is small and not causing the glass kettle body to crack.

[0208] In some embodiments of this embodiment, the magnetic sensing layer 150 is the same as the heating coating. When the thickness of the magnetic sensing layer 150 is uniform and the distribution of the weak magnetic metal material in the magnetic sensing layer 150 is uniform, the heat generated by the magnetic sensing layer 150 is also uniform, improving the thermal shock resistance of the glass kettle body.

[0209] In summary, the beneficial effects of the embodiments of the present invention are as follows:

[0210] 1. The flatness tolerance range of the magneto-sensitive layer 150 with a sense of design is from 0 micrometers to 15 micrometers, which improves the uniformity of heat generation of the magneto-sensitive layer 150, reduces the stress generated in the bottom plate 130 during the heating process, enables the bottom plate 130 to still be able to be used normally under a heating power greater than 1600 w, and improves the thermal shock resistance of the glass container 100;

[0211] 2. Improving the flatness of the first plane 132 and the second plane 134 can further reduce the stress generated in the bottom plate 130 during heating, reduce the cracking risk of the bottom plate 130, and improve the service reliability of the bottom plate 130;

[0212] 3. Setting the side wall 110 and the bottom plate 130 to be connected through the glass connection layer 140 reduces the cracking risk of the connection layer 140 and improves the hygienic safety of the glass container 100 at the same time.

[0213] In the present invention, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance; the term "plural" refers to two or more, unless otherwise clearly defined. Terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0214] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as a limitation of the present invention.

[0215] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0216] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A glass container, characterized in that, include: A side wall, wherein the side wall surrounds and defines a receiving cavity having an opening; A bottom plate, the bottom plate comprising a first plane and a second plane, the first plane and the second plane are arranged opposite to each other, and the first plane is connected to the side wall so that the bottom plate closes the opening; A magnetically sensitive layer, wherein the magnetically sensitive layer is arranged on the first plane or the second plane; The flatness tolerance range of the magnetic sensitive layer is 0 microns to 15 microns; The magnetically sensitive layer includes a weakly magnetic metal material, which is used in a slurry, coated on the bottom plate, and sintered and solidified to form the magnetically sensitive layer; The relative magnetic permeability of the weak magnetic metal material ranges from 0 to 1; The first plane has a first flatness tolerance, and the second plane has a second flatness tolerance; The flatness tolerance of the magnetic sensitive layer is smaller than the first flatness tolerance; and / or The flatness tolerance of the magnetic sensitive layer is smaller than the second flatness tolerance.

2. A glass container, characterized in that, include: A side wall, wherein the side wall surrounds and defines a receiving cavity having an opening; A bottom plate, the bottom plate comprising a first plane and a second plane, the first plane being located at one side of the accommodating cavity and connected to the side wall so that the bottom plate closes the opening, and the second plane being away from one side of the accommodating cavity and arranged opposite to the first plane; Wherein, the first plane has a first flatness tolerance, and the second plane has a second flatness tolerance; A magnetically sensitive layer, wherein the magnetically sensitive layer is arranged on the first plane, and the first flatness tolerance is smaller than the second flatness tolerance; or The magnetic sensitive layer is arranged on the second plane, and the second flatness tolerance is smaller than the first flatness tolerance; The magnetically sensitive layer includes a weakly magnetic metal material, which is used in a slurry, coated on the bottom plate, and sintered and solidified to form the magnetically sensitive layer; The relative magnetic permeability of the weak magnetic metal material ranges from 0 to 1.

3. A glass container, characterized in that, include: A side wall, wherein the side wall surrounds and defines a receiving cavity having an opening; A bottom plate, the bottom plate comprising a first plane and a second plane, the first plane and the second plane are arranged opposite to each other, and the first plane is connected to the side wall so that the bottom plate closes the opening; Wherein, the first plane has a first flatness tolerance, and the second plane has a second flatness tolerance; A magnetically sensitive layer, wherein the magnetically sensitive layer is arranged on the first plane, and the first flatness tolerance ranges from 0 mm to 0.15 mm; or The magnetically sensitive layer is arranged on the second plane, and the second flatness tolerance ranges from 0 mm to 0.15 mm; The magnetically sensitive layer includes a weakly magnetic metal material, which is used in a slurry, coated on the bottom plate, and sintered and solidified to form the magnetically sensitive layer; The relative magnetic permeability of the weak magnetic metal material ranges from 0 to 1.

4. The glass container according to any one of claims 1 to 3, characterized in that, Also includes: A connection layer connects the first plane and the side wall.

5. The glass container according to claim 4, characterized in that, The connecting layer is a glass connecting layer.

6. The glass container according to any one of claims 1 to 3, characterized in that The thickness of the magnetically sensitive layer ranges from 10 microns to 25 microns.

7. The glass container according to claim 6, characterized in that, When the thickness range of the magnetic - sensitive layer is less than or equal to the first preset thickness, the induction resistance of the magnetic - sensitive layer increases with the increase of the thickness of the magnetic - sensitive layer; when the thickness range of the magnetic - sensitive layer is greater than the first preset thickness, the induction resistance of the magnetic - sensitive layer decreases with the increase of the thickness of the magnetic - sensitive layer.

8. The glass container according to any one of claims 1 to 3, characterized in that The weak magnetic metal material includes one or a combination of the following metals: Silver, aluminum or their alloys, copper or its alloys.

9. The glass container according to any one of claims 1 to 3, characterized in that, The thickness range of the bottom plate is from 1.5 mm to 3.5 mm.

10. The glass container according to any one of claims 1 to 3, characterized in that, The value range of the sheet resistance of the magnetic - sensitive layer is from 0.1 mΩ to 5 mΩ.

11. The glass container according to any one of claims 1 to 3, characterized in that, The magnetic - sensitive layer further includes: Inorganic substances. Among them, the content of the weak magnetic metal material in the magnetic - sensitive layer is between 60% and 90%, and the content of the inorganic substances is between 10% and 40%.

12. A cooking appliance, characterized in that, Including the glass container according to any one of claims 1 to 11.

13. The cooking appliance according to claim 12, wherein, It further includes: An electromagnetic heating device, which is used to provide heat for the glass container.

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