Heat generating body, method of manufacturing the same, heat generating assembly, and electric heating cooker

Abstract

The present disclosure relates to a heat generating body, a manufacturing method thereof, a heat generating assembly, and an electric heating cooker. The heat generating body (12) includes a first oxide ceramic layer (122), a second oxide ceramic layer (126), and a circuit layer (124) arranged between the first oxide ceramic layer (122) and the second oxide ceramic layer (126), the first oxide ceramic layer (122) and the second oxide ceramic layer (126) being sintered together to completely enclose the circuit layer (124) therebetween. Thereby, the high temperature resistance and the service life of the heat generating body are improved.

Description

Technical Field

[0001] The embodiments of this disclosure generally relate to electrical equipment for heating, and particularly to heating elements and methods of manufacturing the same, heating components including heating elements, and electric heating furnaces including heating components. Background Technology

[0002] Besides gas stoves, electric heating devices for cooking and / or heating food are becoming increasingly popular due to their convenience. These devices typically consist of a resistance wire and a heating panel. When energized, the resistance wire heats up and transfers heat to the heating panel, which then heats the food. However, a relatively large current flows through the resistance wire when it is energized. To ensure safety and prevent electrical breakdown, a predetermined dielectric gap must be designed between the resistance wire and the heating panel to prevent current breakdown. This dielectric gap makes the electric heating devices bulky and thick, causing inconvenience for users. Further reduction in the size of electric heating devices is desired. Summary of the Invention

[0003] Embodiments of this disclosure provide a heating element and a method for manufacturing the same, a heating assembly, and an electric heating furnace, aimed at solving one or more of the problems described above and other potential problems.

[0004] According to a first aspect of this disclosure, a heating element is provided. The heating element includes: a first oxide ceramic layer; a second oxide ceramic layer; and a circuit layer disposed between the first oxide ceramic layer and the second oxide ceramic layer, the first oxide ceramic layer and the second oxide ceramic layer being sintered together to completely surround the circuit layer therebetween. Thus, the sandwich structure of the first oxide ceramic layer and the second oxide ceramic layer significantly reduces or eliminates the dielectric gap required for the circuit layer. Furthermore, since the circuit layer of the heating element is encased between the oxide ceramic layers without any exposed portion, the oxidation resistance of the circuit layer is significantly improved, thus enabling it to withstand higher heat resistance temperatures and significantly increasing the service life of the heating element.

[0005] In some embodiments, the circuit layer may be printed on the surface of the first oxide ceramic layer. This allows for the convenient formation of the circuit layer.

[0006] In some embodiments, the heating element is configured as a column, strip, or sheet. This allows for different operating conditions of the heating element to be met.

[0007] In some embodiments, the circuit layer may include a heating element and electrodes disposed at both ends of the heating element, via which the circuit layer is powered. This reduces the risk of short circuits in the circuit layer pattern. Furthermore, it facilitates modular layout when multiple heating elements are connected.

[0008] In some embodiments, the second oxide ceramic layer may include through-holes extending along its thickness direction, the locations of which correspond to the locations of electrodes on the circuit layer, such that the circuit layer is powered via conductive posts received in the through-holes. This facilitates power supply to the circuit layer.

[0009] In some embodiments, the heating element may further include a conductive post disposed in the through-hole, the conductive post being welded to the second oxide ceramic layer and electrically connected to the electrode. This ensures the reliability of the power supply connection to the heating element.

[0010] In some embodiments, the oxides in the first oxide ceramic layer and the second oxide ceramic layer are selected from one or more of zirconium oxide, magnesium oxide, aluminum oxide, beryllium oxide, titanium dioxide, and combinations thereof.

[0011] In some embodiments, the resistance of the circuit layer is any value from 0.5 ohms to 10 ohms, and the heating element, when powered, reaches a temperature greater than or equal to 1100 degrees Celsius. This allows for the provision of high temperatures and high thermal efficiency. In some cases, temperatures can reach as high as 1000 degrees Celsius, 1200 degrees Celsius, 1500 degrees Celsius, or even above 2000 degrees Celsius.

[0012] According to a second aspect of this disclosure, a heating assembly is provided. The heating assembly includes: a plurality of heating elements arranged side-by-side according to any one of the first aspects, each heating element having a first oxide ceramic layer disposed facing the object to be heated to form a heating surface; and a mounting bracket configured to support the heating elements. Thus, a heating assembly requiring a low dielectric clearance can be provided.

[0013] In some embodiments, the heating assembly may further include a first terminal block and a second terminal block separate from the first terminal block. Each heating element has an electrode comprising a first electrode located at a first end of the heating body and a second electrode located at the opposite second end of the heating body. The first electrode of each heating element is connected to the first terminal block, and the second electrode of each heating element is connected to the second terminal block. This modularizes the connection of the heating elements and simplifies the circuit connection of multiple heating elements.

[0014] In some embodiments, the first and second terminal blocks may be arranged symmetrically on both sides of the mounting bracket relative to the heating element. This ensures sufficient clearance between the first and second terminal blocks and facilitates connection of the first and second terminal blocks to external wiring.

[0015] In some embodiments, the mounting bracket may include a first side adapted to mount the heating element and a second side opposite to the first side, with the first and second terminal blocks arranged on the second side of the mounting bracket to provide thermal insulation from the heating element via the body of the mounting bracket. This reduces heat radiation from the terminal blocks.

[0016] In some embodiments, the mounting bracket may include a plurality of through holes adapted to receive conductive posts, such that the electrode of each of the heating elements is electrically connected to a corresponding terminal block via a corresponding conductive post.

[0017] In some embodiments, the mounting bracket may include a heat insulation body comprising a circumferential wall and a bottom wall defining a central recess adapted to accommodate the heating element.

[0018] In some embodiments, the heating element may further include a heat insulation sheet disposed between the respective terminal block and the mounting bracket. This can further reduce the heat radiation experienced by the terminal block.

[0019] In some embodiments, the heating element may further include a heat insulation component arranged around the outer periphery of the mounting bracket. This reduces the circumferential heat radiation of the heating element.

[0020] In some embodiments, the heating component may further include a flexible support located at the bottom of the mounting bracket.

[0021] According to a third aspect of this disclosure, an electric heating stove is provided. The electric heating stove includes: a housing including heating holes; a heating panel mounted in the heating holes; and a heating element according to any one of the second aspects, fixed to the housing below the heating panel.

[0022] In some embodiments, the electric heating appliance may further include a color-changing component disposed on the outer periphery of the heating panel, the color-changing component being configured to change color when the heating panel is heated to above a predetermined temperature.

[0023] According to a fourth aspect of this disclosure, a method for manufacturing a heating element according to the first aspect is provided. The method includes: providing a first oxide ceramic layer and a second oxide ceramic layer; forming a circuit layer at a first predetermined location on the first oxide ceramic layer; and sintering the first oxide ceramic layer and the second oxide ceramic layer such that the first oxide ceramic layer and the second oxide ceramic layer are sintered together to completely surround the circuit layer therebetween.

[0024] In some embodiments, providing a second oxide ceramic layer may further include: drilling a hole at a second predetermined location in the second oxide ceramic layer to form an electrode connection hole.

[0025] In some embodiments, the method may further include hot-pressing the first oxide ceramic layer and the second oxide ceramic layer before oxygen-free sintering.

[0026] In some embodiments, the method may further include: heating the combination of the first oxide ceramic layer and the second oxide ceramic layer and planarizing the outer surfaces of the first oxide ceramic layer and / or the second oxide ceramic layer.

[0027] In some embodiments, the method may further include welding a conductive post at the electrode connection hole after oxygen-free sintering of the first oxide ceramic layer and the second oxide ceramic layer. Attached Figure Description

[0028] The above and other objects, features, and advantages of embodiments of the present disclosure will become readily apparent from the following detailed description taken in conjunction with the accompanying drawings. Several embodiments of the present disclosure are illustrated in the drawings by way of example and not limitation.

[0029] Figure 1 A general schematic diagram of an electric heating furnace according to an embodiment of the present disclosure is shown.

[0030] Figure 2 An exploded schematic diagram of an electric heating furnace according to an embodiment of the present disclosure is shown.

[0031] Figure 3 A partial cross-sectional schematic diagram of an electric heating furnace according to an embodiment of the present disclosure is shown.

[0032] Figure 4 A schematic diagram of the heating element according to an embodiment of the present disclosure is shown.

[0033] Figure 5 An exploded schematic diagram of a heating element according to an embodiment of the present disclosure is shown.

[0034] Figure 6 A partial view of a heating element according to an embodiment of the present disclosure is shown.

[0035] Figure 7 A partial enlarged view of the heating element according to an embodiment of the present disclosure is shown.

[0036] Figure 8 A perspective view of a heating component according to an embodiment of the present disclosure is shown.

[0037] Figure 9 An exploded view of a heating component according to an embodiment of the present disclosure is shown.

[0038] Figure 10 Show Figure 9 A cross-sectional view of the heating element of the heating device shown.

[0039] Figure 11 A partial enlarged view of the heating component according to an embodiment of the present disclosure is shown.

[0040] Figure 12 A flowchart illustrating a method for manufacturing a heating element according to an embodiment of the present disclosure is shown.

[0041] In the various figures, the same or corresponding reference numerals indicate the same or corresponding parts. Detailed Implementation

[0042] Preferred embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.

[0043] The term "comprising" and its variations as used herein signify an open-ended inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "at least partially based on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". Terms such as "upper", "lower", "front", and "rear", indicating placement or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are used only for the purpose of describing the principles of this disclosure, and are not intended to indicate or imply that the elements referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore should not be construed as limiting this disclosure.

[0044] As described in the background art, in conventional electric heating equipment, a small resistance is typically used to generate a large current in order to ensure heating power. During the use of electric heating equipment, a large current increases the risk of dielectric breakdown. Therefore, sufficient dielectric clearance must be ensured between the resistance wire and the heating surface, and between the resistance wire and other surrounding components. A large dielectric clearance means that the electric heating equipment is bulky and large in size, which is disadvantageous in terms of portability and storage. To address this, according to embodiments of the present disclosure, a heating element that significantly reduces the required dielectric clearance and a miniaturized electric heating stove including such a heating element are provided. The heating element and the electric heating stove including the heating element according to embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

[0045] Figures 1-3 Structural details of an electric heating stove 100 according to an embodiment of the present disclosure are shown. For example... Figures 1-3 As shown, the electric heating appliance 100 may include a heating element 10, a housing 20, and a heating panel 30. The housing 20 may include one or more heating holes 21. The heating element 10 is configured to generate heat to heat a cooking appliance such as a pot. The heating element 10 may be arranged directly below the heating holes 21. The heating panel 30 is arranged directly above the heating element 10. The heating panel 30 is configured to support the cooking appliance. In some embodiments, the heating panel 30 may be made of microcrystalline glass. When the heating element 10 generates heat, heat can be transferred to the heating panel 30, thereby heating the object to be heated via the heating panel 30.

[0046] In some embodiments, the housing 20 may be implemented as a multi-piece unit to facilitate assembly of the device. For example... Figure 2 and Figure 3As shown, the housing 20 may include an upper cover 25 and a lower cover 23. The heating element 10 may be securely held between the upper cover 25 and the lower cover 23. In some embodiments, the upper cover 25 and the lower cover 23 may be secured together using screws 27, with the heating element 10 clamped between them. The upper cover 25 may include a heating hole 21. A heating panel 30 may be mounted in the heating hole 21. As an example, the heating panel 30 is removably attached to the upper cover 25 (e.g., by snap-fit). In the illustrated embodiment, the heating hole 21 and the heating panel 30 are shown in a circular shape; this is merely exemplary. The heating hole 21 and the heating panel 30 may also be formed in other suitable shapes, such as rectangles. Furthermore, in the illustrated embodiment, only one heating hole 21 and one heating panel 30 are shown. This is merely exemplary. The number of heating holes 21 and heating panels 30 may be multiple, for example, two, three, or more, to provide simultaneous heating of multiple objects by means of the stove. In some embodiments, the electric heating appliance 100 may include one or more feet 29 disposed at the bottom of the housing 20, which can support the entire electric heating appliance 100. The feet 29 can isolate the body of the electric heating appliance 100 from a supporting surface such as a tabletop or the ground by a gap. The feet not only provide heat insulation but also prevent slippage, ensuring safe use of the device.

[0047] In some embodiments, such as Figure 2 and Figure 3 As shown, the heating assembly 10 may include a plurality of heating elements 12 arranged side by side. The heating elements 12 may be configured in an elongated shape; for example, the heating elements 12 may be formed as thin columns, thin strips, or sheets. The heating elements 12 may be cut to an appropriate size according to the size of the heating holes 21. The number of heating elements 12 can be determined according to the heating...

[0048] The size of the hole 21 is selected based on the heating power of the device. Multiple heating elements 125 arranged side by side are mounted on the mounting bracket 14. The mounting bracket 14 may be made of a material with good thermal insulation properties.

[0049] The mounting bracket 14 not only supports the heating element 12, but also thermally isolates the heating element 12 from other components of the electric heating stove 100.

[0050] In some embodiments, such as Figure 2 As shown, the electric heating appliance 100 may also include a color-changing component 32. The color-changing component 32 is configured to change color when above a predetermined temperature. The color-changing component 32 may be configured to provide an indication that the heating element of the electric heating appliance 100 is in a high-temperature state.

[0051] After the electric heating stove 100 has finished cooking food, the heating panel of the electric heating stove 100 may still be at a high temperature. If a user accidentally touches the heating panel at this time, they may easily be burned. This can be addressed by setting the color-changing component 32 so that when the color-changing component 32 is in a position that is incompatible with the human body...

[0052] At dangerous temperatures, the color-changing component displays a different color to alert the user to avoid contact with the heating panel. In some embodiments, the color-changing component 32 may be configured to contact the heating panel 30. As an example, the color-changing component 32 may be configured on the outer periphery of the heating panel so that it is directly visible from the outside. The color-changing component 32 may be configured in any other suitable location, as long as it reflects the temperature state of the heating panel 30. Alternatively,

[0053] The color-changing component 32 may be in contact with the heating panel and / or the heating element, or the color-changing component 320 may be disposed at a distance from the heating panel and / or the heating element. In some embodiments, the color-changing component 32 may be a ring-shaped component, such a shape facilitating observation from a 360° angular range. It should be understood that this is merely exemplary, and the color-changing component 32 may be formed in any other suitable shape.

[0054] In some embodiments, the electric heating appliance 100 may further include a power plug 50. The power plug 50 can be connected to an external power source such as mains power to provide power for electric heating.

[0055] The stove 100 is powered. The electric heating stove 100 may also include a control component 40. The control component 40 may include components such as a user interface and a control circuit board. The user interface can accept user input, such as setting the heating temperature and setting the heating mode. The user interface can also provide the user with indications of the operating status of the electric heating stove 100, such as providing a temperature display and an operating mode display. The control component 40 is also configured to control the operation of the electric heating stove 100, for example, by controlling the heating power of the heating element 10 according to user input to provide the required heating. Considering that these components are not the focus of this disclosure embodiment, detailed descriptions thereof are omitted.

[0056] Figures 4-7 Structural details of the heating element 12 according to an embodiment of the present disclosure are shown. In some embodiments, such as Figures 4-5 As shown, the heating element 12 includes a first oxide ceramic layer 122, a second oxide ceramic layer 126, and a circuit layer 124 disposed between the first oxide ceramic layer 122 and the second oxide ceramic layer 126. The first oxide ceramic layer 122 and the second oxide ceramic layer 126 are sintered together to completely surround the circuit layer 124 therebetween.

[0057] According to an embodiment of this disclosure, the heating element 12 is formed as a sandwich structure, and the circuit layer 124 is completely surrounded on the outside by a first oxide ceramic layer 122 and a second oxide ceramic layer 126, with no exposed areas. The first oxide ceramic layer 122 and the second oxide ceramic layer 126 typically have high melting temperatures and stable performance at high temperatures. Furthermore, the first oxide ceramic layer 122 and the second oxide ceramic layer 126 have good electrical insulation properties, effectively preventing current breakdown. According to the sandwich structure of the heating element 12 in this embodiment of the disclosure, the first oxide ceramic layer 122 and the second oxide ceramic layer 126 can provide good dielectric properties for the heating element 12. When this heating element 12 is used in an electric heating furnace 100, the dielectric gap for the heating element 12 can be significantly reduced, or even reduced to zero. The heating element 12 can be directly spaced from the heating panel 30 with a very small gap, or can be in direct contact, both ensuring good dielectric properties. Because the circuit layer is encased between oxide ceramic layers without any exposed portion, the oxidation resistance of the circuit layer is significantly improved, enabling it to withstand higher heat resistance temperatures, up to 1000 degrees Celsius, 1200 degrees Celsius, 1500 degrees Celsius, and even above 2000 degrees Celsius, and significantly extending the service life of the heating components.

[0058] In some embodiments, the oxide ceramics in the first oxide ceramic layer 122 and the second oxide ceramic layer 126 may include single oxide ceramics, such as zirconium oxide, magnesium oxide, aluminum oxide, beryllium oxide, titanium dioxide, etc. For example, zirconium oxide has significant performance advantages due to its extremely high temperature resistance, and can further increase the heating temperature that the electric heating furnace 100 can provide under the same size conditions. Alumina has significant advantages due to its low cost. In other embodiments, the oxide ceramics may include composite oxide ceramics, such as composites of zirconium oxide, magnesium oxide, aluminum oxide, beryllium oxide, titanium dioxide, etc., as examples of spinel, mullite, lead zirconate titanate (PZT) ceramics, etc.

[0059] The circuit layer 124 may be made of metal wire and heats up when energized. The metal wire may be made of suitable metallic materials such as copper, tungsten-molybdenum alloy, etc. In some embodiments, such as... Figure 4 and Figure 5 As shown, the circuit layer 124 can be formed in the form of a wire pattern. The circuit layer 124 can be printed on the surface of the first oxide ceramic layer 122. The heating element 12 can be configured in an elongated shape. Although in the illustrated embodiment, the heating element 12 is formed in a sheet shape, it should be understood that this is merely exemplary, and the heating element 12 can be formed in a columnar, strip-shaped, or other similar shape, as long as the circuit layer 124 can be completely surrounded by the first oxide ceramic layer 122 and the second oxide ceramic layer 126.

[0060] In some embodiments, such as Figure 4 and Figure 5 As shown, circuit layer 124 includes a patterned heating element 1244 and electrodes 1242. Power can be supplied to circuit layer 124 through electrodes 1242. Figure 4 and Figure 5 In the illustrated embodiment, electrodes 1242 are respectively arranged at both ends of the heating body 1242. This has advantages in the manufacturing and assembly of the heating element 12. Considering that the heating element is formed into an elongated shape, when electrodes 1242 are formed at one end of the heating body 1242, simultaneously providing two electrodes on the elongated circuit layer 124 places higher demands on the manufacturing worker. The two electrodes need to be spaced sufficiently far apart to avoid short circuits between them. However, when electrodes 1242 are arranged at both ends of the heating body 1242, the two electrodes 1242 are spaced far enough apart, so the aforementioned risks do not exist. Furthermore, when electrodes 1242 are arranged at both ends of the heating body 1242, this has advantages in terms of modularity of the heating assembly 10 when multiple heating elements 12 are arranged side by side. Although in the illustrated embodiment, electrodes 1242 are respectively arranged at both ends of the heating body 1242, this is merely exemplary, and electrodes 1242 can be arranged at other locations on the heating body 1242 that are spaced sufficiently apart from each other.

[0061] In some embodiments, the second oxide ceramic layer 126 may include a through-hole 1262 extending along its thickness direction, the position of the through-hole 1262 corresponding to the position of the electrode 1242 on the circuit layer 124, such that the circuit layer 124 is powered via a conductive post 128 received in the through-hole 1262. The heating element 12 also includes a conductive post 128 disposed in the through-hole 1262, the conductive post 128 being soldered to the second oxide ceramic layer 126 and electrically connected to the electrode 1242. By providing the conductive post 128 protruding away from the surface on one surface side of the oxide ceramic layer, such an electrode connection arrangement is advantageous for the modularity of the heating assembly 10. Furthermore, this allows for efficient utilization of the thickness of the insulation layer in the thickness direction of the electric heating furnace 100 to facilitate power supply to the heating element 12.

[0062] Furthermore, such an electrode connection structure has advantages in the manufacturing of the heating element. This is because the heating element adopts a structure of two oxide ceramic layers. During the manufacturing process of the heating element, the bonding between the two oxide ceramic layers is involved, for example, a high-temperature sintering process is required. By additionally setting the conductive pillars 128, damage to the electrodes 1242 during high-temperature sintering is avoided.

[0063] In other embodiments (not shown), instead of providing conductive posts 128 that protrude perpendicularly to the surface of the circuit layer 12, the conductive posts 128 can also be provided parallel to the surface of the circuit layer 12, thereby providing an electrical connection structure for the circuit layer 12 in the extending direction of the heating element 12. This can similarly achieve the advantages of modular circuit connection described above.

[0064] In some embodiments, the resistance of the circuit layer 124 of the heating element 12 is in the range of 0.5 ohms to 10 ohms. It should be understood that the above numerical range is merely exemplary, and the circuit layer 124 may have a larger or smaller resistance to meet specific application requirements. In some embodiments, the heating temperature of the heating element after being powered is greater than or equal to 700 degrees Celsius, particularly temperatures above 1000 degrees Celsius, 1200 degrees Celsius, or 1500 degrees Celsius, which is beneficial for everyday cooking needs.

[0065] Figures 8-11 Structural details of the heating component 10 according to an embodiment of this disclosure are shown. For example... Figures 8-11 As shown, the heating assembly 10 includes a plurality of heating elements 12 arranged side by side. A first oxide ceramic layer 122 of each heating element 12 is disposed facing the object to be heated to form a heating surface. The heating surface of the heating element 10 may face a heating panel disposed above it. In some embodiments, the heating surface of the heating element 10 may be in direct contact with the heating panel. In other embodiments, the heating surface of the heating element 10 may be spaced apart from the heating panel. The heating elements 12 are mounted on a mounting bracket 14. The mounting bracket 14 is configured to support the heating elements 12. In some embodiments, in addition to providing support for the heating elements 12, the mounting bracket 14 may also be configured to thermally insulate the heating elements 12 from surrounding components.

[0066] In some embodiments, such as Figures 9-11 As shown, the mounting bracket 14 includes a heat insulation body 142, which includes a circumferential wall and a bottom wall. The circumferential wall and the bottom wall together define a central recess suitable for arranging a heating element 12. The heating element 10 can be arranged in the central recess. As an example, the central recess may include an outer peripheral flange on which the heating element 10 can be supported and suspended at the bottom. In this way, the heating element 10 is physically separated from the heat insulation body 142 except for the mounting components, to reduce heat transfer between the heating element and the heat insulation body 142, so that the heat of the heating element 10 is radiated outward through the heating surface as much as possible. In some embodiments, instead of a central recess, the mounting bracket 14 may include a flat support surface on which the heating element 12 can be arranged directly. In some embodiments, the heat insulation body 142 may include high-temperature resistant insulating asbestos. It should be understood that this is merely exemplary, and the heat insulation body can be made of any other suitable high-temperature resistant material.

[0067] In some embodiments, such as Figures 9-11 As shown, the heating element 10 includes multiple heating elements 12 arranged side by side. Therefore, a power supply line is needed for each heating element 12. Considering the high-temperature environment of the heating element 10, the layout of the power supply lines for the heating elements 12 is a crucial design consideration. Not only must the wires be kept as far away from the heating elements as possible to prevent premature aging of the power supply lines, but it is also necessary to prevent an excessive number of wires from complicating installation and increasing maintenance difficulty.

[0068] In some embodiments, such as Figures 9-11 As shown, the electrodes 1242 of the heating element 12 are located at opposite ends of the heating element, which allows the wiring circuit for the multiple heating elements 12 to be implemented in a modular manner. To implement the power supply circuit for the heating elements 12, the multiple heating elements 12 employ an integrated power supply terminal block. As an example, a first terminal block 143 and a second terminal block 143 can be provided. The first terminal block 143 can be connected to the first electrode 1242 of each heating element 12, and the second terminal block 143 can be connected to the second electrode 1242 of each heating element 12. The first terminal block 143 and the second terminal block 143 can be connected to a power source via wires 52, respectively. The electrodes of each heating element 12 include a first electrode 1242 located at a first end of the heating body and a second electrode 1242 located at the opposite second end of the heating body. The first electrode 1242 of each heating element 12 is connected to the first terminal block 143, and the second electrode 1242 of each heating element 12 is connected to the second terminal block 143. It should be understood that this is merely exemplary, and some heating elements of the multiple heating elements 12 can also be connected using independent wires, although this may increase the complexity of the connection.

[0069] The mounting bracket 14 may include a first side adapted for mounting the heating element 12 and a second side opposite to the first side. A first terminal block 143 and a second terminal block 143 are arranged on the second side of the mounting bracket 14 to provide thermal insulation between the mounting bracket 14 and the heating element 12 via the body of the mounting bracket 14. Thus, the thermal insulation provided by the mounting bracket 14 prevents the first terminal block 143 and the second terminal block 143 from being overheated. In some embodiments, the first terminal block 143 and the second terminal block 143 are opposite to each other.

[0070] The heating elements 12 are arranged symmetrically on both sides of the mounting bracket 14. This arrangement improves the ease of wiring and the thermal balance of the device.

[0071] In some embodiments, such as Figures 9-11 As shown, the mounting bracket 14 includes a plurality of through holes 147 adapted to receive conductive posts 128. The electrode 1242 of each heating element 12 is electrically connected to a corresponding terminal block 143 via a corresponding conductive post 128. Each heating element 12 can be electrically connected via a conductive post 128.

[0072] The post 128 is electrically connected to the corresponding terminal block 143. By extending the conductive post 128 in a direction perpendicular to the heating surface of the heating element 120, the wire 52 can be kept away from the heat source.

[0073] In some embodiments, such as Figure 9 and Figure 10 As shown, the heating element 10 also includes a heat insulation sheet 145 disposed between the respective terminal block 143 and the mounting bracket 14. The shape of the heat insulation sheet 145 may be similar to that of the terminal block 143. As an example, the heat insulation sheet 145 may be a mica sheet.

[0074] Understand that this is merely an example. The shape and material of the heat insulation plate 145 can be any other suitable material. The heat insulation plate can further reduce heat transfer from the heating element 10 to the junction box 143.

[0075] In some embodiments, such as Figure 9 and Figure 10 As shown, the heating assembly 10 also includes a heat insulation element 144 arranged around the mounting bracket 14. Figure 9 and Figure 10 In the illustrated embodiment, heat insulation

[0076] Component 144 is formed as a cover structure surrounding the mounting bracket 14. The thermal insulation component may be made of a rigid material. In addition to providing thermal insulation, it may also provide rigid support for the mounting bracket.

[0077] In some embodiments, the heat insulation member 144 may be formed as a heat insulation assembly. The heat insulation assembly may include metal members for structural support to ensure the structural support strength of the heating assembly 10. When the heating assembly 10 uses easily dissipated components such as heat insulation cotton, the heat insulation member 144 may surround...

[0078] The insulation material acts as a container. The insulation assembly may also include components made of a high-temperature resistant flexible material 5, examples of which may include aerogel, silicone, etc. The insulation component has a certain degree of flexibility to compensate for manufacturing tolerances of the mounting bracket; furthermore, it can absorb vibrations from the mounting bracket. As an example, the insulation ring may include silicone pads and / or aerogel, etc.

[0079] In some embodiments, the heating element 10 further includes a flexible support portion 149 disposed at the bottom of the mounting bracket 14. The flexible support portion 149 may be in the form of a silicone body, for example. The flexible support portion 149 may be installed below the mounting bracket 14 to support the mounting bracket. In some embodiments, the flexible support portion 149 may be disposed on the bottom wall of the heat insulation member 144. Thus, reliable support can be provided for the heating element.

[0080] Figure 12A flowchart illustrating a method 300 for manufacturing a heating element according to an embodiment of the present disclosure is shown. Figure 12 In method 300, at block 302, a first oxide ceramic layer 122 and a second oxide ceramic layer 126 are provided. As an example, an isostatically laminated oxide ceramic casting sheet is cut to form a semi-finished blank as the first oxide ceramic layer 122 and the second oxide ceramic layer 126. At block 304, a circuit layer 124 is formed at a first predetermined position on the first oxide ceramic layer 122. As an example, a pre-mixed metal resistive paste is printed onto the semi-finished blank to form a heating circuit. After forming the heating circuit, metal electrodes are printed at appropriate positions on the printed circuit. At block 306, the first oxide ceramic layer 122 and the second oxide ceramic layer 126 are sintered. The first oxide ceramic layer 122 and the second oxide ceramic layer 126 are sintered together (e.g., oxygen-free sintering) to completely surround the circuit layer 124 therebetween.

[0081] In some embodiments, providing the second oxide ceramic layer 126 further includes drilling a hole at a second predetermined location in the second oxide ceramic layer 126 to form an electrode connection hole. In some embodiments, to achieve sintering of the first oxide ceramic layer 122 and the second oxide ceramic layer 126, the first oxide ceramic layer 122 and the second oxide ceramic layer 126 may be hot-pressed before oxygen-free sintering. Hot pressing can achieve a preliminary bonding of the first oxide ceramic layer 122 and the second oxide ceramic layer 126 and can form an oxygen-free environment between the first oxide ceramic layer 122 and the second oxide ceramic layer 126. In some embodiments, the hot-pressed first oxide ceramic layer 122 and the second oxide ceramic layer 126 may be further trimmed to the size of the final product. In some embodiments, the bond of the first oxide ceramic layer 122 and the second oxide ceramic layer 126 may also be heated and the outer surfaces of the first oxide ceramic layer 122 and / or the second oxide ceramic layer 126 may be planarized. This is necessary for forming a flat, sheet-like heating element. In some embodiments, if the heating and leveling step fails to meet product requirements in one attempt, it needs to be repeated multiple times until the predetermined requirements are met. In some embodiments, after oxygen-free sintering of the first oxide ceramic layer 122 and the second oxide ceramic layer 126, conductive posts 128 may be welded at the electrode connection holes.

[0082] The above example, using an electric heating furnace as an example application scenario, illustrates the application example of the heating element according to the embodiments of this disclosure. It should be understood that this is merely exemplary, and the heating element can also be applied to electrical equipment requiring electric heating, such as electric pots, water heaters, electric ovens, electric grills, and electric baking pans.

[0083] Furthermore, although the operations are described in a specific order, this should be understood as requiring that such operations be performed in the specific order shown or in sequential order, or requiring that all illustrated operations be performed to achieve the desired result. In certain environments, multitasking and parallel processing may be advantageous. Similarly, although several specific implementation details are included in the above discussion, these should not be construed as limiting the scope of this disclosure. Certain features described in the context of individual embodiments may also be implemented in combination in a single implementation. Conversely, various features described in the context of a single implementation may also be implemented individually or in any suitable sub-combination in multiple implementations.

[0084] Although the subject matter has been described using language specific to structural features and / or methodological logic, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. Rather, the specific features and actions described above are merely illustrative examples of implementing the claims.

[0085] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A heating element (10), comprising: A plurality of heating elements (12) are arranged side by side, each of the heating elements (12) having an elongated shape extending in a longitudinal direction and including a top side located in a direction perpendicular to the longitudinal direction and a bottom side opposite to the top side, the top side of the plurality of heating elements (12) defining a heating side and the bottom side of the plurality of heating elements (12) defining a mounting side. as well as Mounting bracket (14) is arranged on the mounting side of the plurality of heating elements (12) and configured to support the plurality of heating elements (12) on the mounting side. Each of the plurality of heating elements (12) includes: First oxide ceramic layer (122); The second oxide ceramic layer (126); and A circuit layer (124) is disposed between a first oxide ceramic layer (122) and a second oxide ceramic layer (126), the first oxide ceramic layer (122) and the second oxide ceramic layer (126) being sintered together to completely surround the circuit layer (124) therebetween, wherein the first oxide ceramic layer (122) of each of the heating elements (12) is disposed facing the object to be heated to form a heating surface; The circuit layer (124) includes a heating element (1244) and a first electrode and a second electrode (1242) respectively arranged at the longitudinal ends of the heating element (1244), wherein the first electrode and the second electrode (1242) are configured to supply power to the circuit layer (124); The second oxide ceramic layer (126) includes a first through hole and a second through hole (1262) extending along its thickness direction on the mounting side, and the positions of the first through hole and the second through hole (1262) correspond to the positions of the first electrode and the second electrode (1242), respectively. Each of the plurality of heating elements (12) further includes a first conductive post and a second conductive post (128) respectively received in the first through hole and the second through hole (1262) so that the circuit layer (124) is powered via the first conductive post and the second conductive post (128) received in the first through hole and the second through hole (1262); The heating component (10) further includes a terminal block (143) located on the mounting side and disposed on the mounting bracket (14). The terminal block (143) includes a first terminal and a second terminal adapted to be connected to an external power source. The terminal block (143) is electrically connected to the first conductive post and the second conductive post (128) of each of the plurality of heating elements (12) to provide power supply paths from the first terminal and the second terminal to the first electrode and the second electrode (1242) of each of the plurality of heating elements (12).

2. The heating assembly (10) according to claim 1, wherein the wiring board (143) comprises a first wiring board (143) and a second wiring board (143) separate from the first wiring board (143), the first electrode (1242) of each heating element (12) is connected to the first wiring board (143), and the second electrode (1242) of each heating element (12) is connected to the second wiring board (143).

3. The heating assembly (10) according to claim 2, wherein the first terminal block (143) and the second terminal block (143) are arranged symmetrically on both sides of the mounting bracket (14) relative to the heating element (12).

4. The heating assembly (10) according to claim 2, wherein the mounting bracket (14) includes a first side adapted to mount the heating element (12) and a second side opposite to the first side, and the first terminal block (143) and the second terminal block (143) are arranged on the second side of the mounting bracket (14) to thermally insulate the heating element (12) via the body of the mounting bracket (14).

5. The heating assembly (10) according to claim 4, wherein the mounting bracket (14) includes a plurality of through holes (147) adapted to receive the first conductive post and the second conductive post (128) such that the electrode (1242) of each of the heating elements (12) is electrically connected to the corresponding terminal block (143) via the corresponding conductive post (128).

6. The heating assembly (10) according to claim 1, wherein the mounting bracket (14) includes a heat insulation body (142) including a circumferential wall and a bottom wall, the circumferential wall and the bottom wall defining a central recess adapted to accommodate the heating element (12).

7. The heating assembly (10) according to any one of claims 1-6 further includes a heat insulation sheet (145) disposed between the terminal block (143) and the mounting bracket (14).

8. The heating component (10) according to any one of claims 1-6 further includes a heat insulation component arranged around the outer periphery of the mounting bracket (14).

9. The heating assembly (10) according to any one of claims 1-6 further includes a flexible support (149) located at the bottom of the mounting bracket (14).

10. The heating component (10) according to any one of claims 1-6, wherein the circuit layer (124) is printed on the surface of the first oxide ceramic layer (122).

11. The heating element (12) according to any one of claims 1-6, wherein the heating element (12) is configured as a column, strip, or sheet.

12. The heating element (12) according to any one of claims 1-6, wherein the oxides in the first oxide ceramic layer (122) and the second oxide ceramic layer (126) are selected from one or more of zirconium oxide, magnesium oxide, aluminum oxide, beryllium oxide, titanium dioxide, and combinations thereof.

13. The heating element (12) according to any one of claims 1-6, wherein the resistance of the circuit layer (124) is any value from 0.5 ohms to 10 ohms, and the heating element, when powered, has a heating temperature greater than or equal to 700 degrees Celsius.

14. An electric heating stove, comprising: The housing (20) includes heating holes (21); A heating panel (30) is installed in the heating hole (21); as well as The heating component (10) according to any one of claims 1-13 is fixed to the housing (20) below the heating panel (30).

15. The electric heating appliance according to claim 14 further includes a color-changing component (32) disposed on the outer periphery of the heating panel, the color-changing component (32) being configured to change color when the heating panel is heated to above a predetermined temperature.

16. A method for manufacturing a heating component (10) according to any one of claims 1-13, comprising: A first oxide ceramic layer (122) and a second oxide ceramic layer (126) are provided. A circuit layer (124) is formed at a first predetermined location on the first oxide ceramic layer (122); and The first oxide ceramic layer (122) and the second oxide ceramic layer (126) are sintered together so that the first oxide ceramic layer (122) and the second oxide ceramic layer (126) are sintered together to completely surround the circuit layer (124) therebetween.

17. The method of claim 16, wherein providing the second oxide ceramic layer (126) further comprises: A hole is drilled at a second predetermined position in the second oxide ceramic layer (126) to form an electrode connection hole.

18. The method of claim 16 further comprises hot-pressing the first oxide ceramic layer (122) and the second oxide ceramic layer (126) before oxygen-free sintering.

19. The method according to any one of claims 16-18, further comprising: The combination of the first oxide ceramic layer (122) and the second oxide ceramic layer (126) is heated and the outer surfaces of the first oxide ceramic layer (122) and / or the second oxide ceramic layer (126) are planarized.

20. The method of claim 17 further comprises welding a conductive post (128) at the electrode connection hole after oxygen-free sintering of the first oxide ceramic layer (122) and the second oxide ceramic layer (126).

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