CN115866812A - Heating element, method for manufacturing heating element, and electric heating furnace - Google Patents

Abstract

The present disclosure relates to a heating element, a method of manufacturing the heating element, a heating element, and an electric heating furnace. The heating element (12) is provided with: 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) being sintered to each other to completely surround the circuit layer (124) therebetween. Thereby, the high temperature resistance and the service life of the heating element are improved.

Description

Heating element and manufacturing method thereof, heating component and electric heating stove

technical field

Embodiments of the present disclosure generally relate to electrical equipment for heating, and in particular to a heating element and a manufacturing method thereof, a heating component including the heating element, and an electric heating stove including the heating component.

Background technique

In addition to gas cookers, considering the convenience of getting electricity, electric heating devices that use electricity to cook and/or heat food are more and more widely used. These electric heating devices usually consist of resistance wires and heating panels. When the resistance wire is energized, the resistance wire generates heat and transfers the heat to the heating panel, and then heats the object through the heating panel. However, when the resistance wire is energized, a large current flows through the resistance wire. In order to ensure the safety of use and prevent electrical breakdown, a predetermined dielectric gap must be designed between the resistance wire and the heating panel to ensure the dielectric gap to prevent current breakdown. The existence of the dielectric gap makes the electric heating device relatively bulky and thick, which brings many inconveniences to users. It is expected that electric heating devices can be further reduced in size.

Contents of the invention

Embodiments of the present disclosure provide a heating body, a manufacturing method thereof, a heating assembly, and an electric heating stove, aiming to solve one or more of the above-mentioned problems and other potential problems.

According to a first aspect of the present disclosure, a heat generating body is provided. The heat generating body 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 The oxide ceramic layer and the second oxide ceramic layer are sintered to each other to completely surround the circuit layer therebetween. Thus, through the sandwich structure of the first oxide ceramic layer and the second oxide ceramic layer, the dielectric gap required by the circuit layer is greatly reduced or eliminated. In addition, the circuit layer of the heating element is covered between the oxide ceramic layers without being partially exposed, which greatly improves the oxidation resistance of the circuit layer, so it can withstand a higher heat-resistant temperature, and significantly improves the performance of the heating element. service life

In some embodiments, the circuit layer may be printed on the surface of the first oxide ceramic layer. Thus, the circuit layer can be easily formed.

In some embodiments, the heating element is configured in a column shape, a strip shape, or a sheet shape. In this way, different working condition requirements of the heating element can be realized.

In some embodiments, the circuit layer may include a heat generating body and electrodes respectively arranged at both ends of the heat generating body, through which the circuit layer is powered. Thus, the risk of short circuiting of the circuit layer pattern can be reduced. In addition, it can also facilitate the modular layout when multiple heating elements are connected.

In some embodiments, the second oxide ceramic layer may include through-holes penetrating in its thickness direction, and the positions of the through-holes correspond to the positions of the electrodes on the circuit layer, so that the circuit layer passes through A conductive post received in the through hole is powered. Thus, power can be conveniently supplied to the circuit layer.

In some embodiments, the heat generating body may further include a conductive post disposed in the through hole, the conductive post being soldered to the second oxide ceramic layer and electrically connected to the electrode. Thereby, the reliability of the power supply connection of a heating element can be ensured.

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

In some embodiments, the resistance of the circuit layer is any value from 0.5 ohm to 10 ohm, and the heating temperature of the heating element after being powered is greater than or equal to 1100 degrees Celsius. Thus, high temperature and high thermal efficiency can be provided. In some cases, it can be as high as 1000 degrees Celsius, 1200 degrees Celsius, 1500 degrees Celsius, or even more than 2000 degrees Celsius.

According to a second aspect of the present disclosure, a heat generating component is provided. The heating component includes: a plurality of heating elements according to any one of the first aspect arranged side by side, the first oxide ceramic layer of each heating element is arranged facing the object to be heated to form a heating surface; and installing a frame configured to support the heating element. Thereby, a heat generating component requiring a low dielectric gap can be provided.

In some embodiments, the heating component may further include a first wiring board and a second wiring board separated from the first wiring board, and the electrodes of each heating body include a first electrode located at the first end of the heating body and the second electrode located at the opposite second end of the heating body, the first electrode of each heating body is connected to the first wiring board, and the second electrode of each heating body is connected to The second wiring board. This enables modularization of the connection of the heating elements and simplifies the circuit connection of a plurality of heating elements.

In some embodiments, the first wiring board and the second wiring board may be symmetrically arranged on both sides of the installation frame with respect to the heating body. Thereby, a sufficient gap between the first terminal board and the second terminal board can be ensured and the connection of the first terminal board and the second terminal board to external lines can be facilitated.

In some embodiments, the mounting bracket may include a first side suitable for mounting the heating element and a second side opposite to the first side, the first wiring board and the second wiring board are arranged on the second side of the mount to be thermally isolated from the heating body via the body of the mount. Thereby, heat radiation of the terminal board can be reduced.

In some embodiments, the mounting bracket may include a plurality of through holes suitable for receiving conductive posts, so that the electrodes of each heating element are electrically connected to corresponding wiring boards via corresponding conductive posts.

In some embodiments, the mounting bracket may include a thermal insulator including a peripheral wall and a bottom wall defining a central groove adapted to arrange the heat generating body.

In some embodiments, the heat generating component may further include a heat insulating sheet disposed between the corresponding wiring board and the installation frame. Thereby, the heat radiation to which the terminal block is subjected can be further reduced.

In some embodiments, the heat-generating component may further include a heat-insulating component arranged around the periphery of the mounting frame. Thereby, heat radiation of the heat generating body in the circumferential direction can be reduced.

In some embodiments, the heat generating component may further include a flexible support portion located at the bottom of the mounting frame.

According to a third aspect of the present disclosure, an electrically heated stove is provided. The electric heating stove comprises: a casing including a heating hole; a heating panel installed in the heating hole; and the heating component according to any one of the second aspect of the claim, fixed under the heating panel into the housing.

In some embodiments, the electric heating stove may further include a discoloration component disposed on the periphery of the heating panel, and the discoloration component is configured to change color when the heating panel is heated above a predetermined temperature.

According to a fourth aspect of the present disclosure, there is provided a method for manufacturing the heat generating body according to the first aspect. The method includes: providing a first oxide ceramic layer and a second oxide ceramic layer; forming a circuit layer at a first predetermined position on the first oxide ceramic layer; and sintering the first oxide ceramic layer and the The second oxide ceramic layer is formed such that the first oxide ceramic layer and the second oxide ceramic layer are sintered to each other to completely surround the circuit layer therebetween.

In some embodiments, providing the second oxide ceramic layer may further include: drilling a hole at a second predetermined position of the second oxide ceramic layer to form an electrode connection hole.

In some embodiments, the method may further include hot pressing the first oxide ceramic layer and the second oxide ceramic layer before anaerobically sintering the first oxide ceramic layer and the second oxide ceramic layer layer.

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 first oxide ceramic layer and/or the The outer surface of the second oxide ceramic layer.

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

Description of drawings

The above and other objects, features and advantages of embodiments of the present disclosure will become readily understood by reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of the present disclosure are shown by way of example and not limitation.

Fig. 1 shows an overall schematic diagram of an electric heating stove according to an embodiment of the present disclosure.

Fig. 2 shows an exploded schematic diagram of an electric heating stove according to an embodiment of the present disclosure.

Fig. 3 shows a partial cross-sectional schematic diagram of an electric heating stove according to an embodiment of the present disclosure.

Fig. 4 shows an overall schematic diagram of a heating body according to an embodiment of the present disclosure.

Fig. 5 shows an exploded schematic diagram of a heating element according to an embodiment of the present disclosure.

FIG. 6 shows a partial view of a heat generating body according to an embodiment of the present disclosure.

Fig. 7 shows an enlarged view of a partial detail of a heat generating body according to an embodiment of the present disclosure.

Fig. 8 shows a schematic perspective view of a heating component according to an embodiment of the present disclosure.

FIG. 9 shows an exploded view of a heat generating component according to an embodiment of the disclosure.

Fig. 10 shows a sectional view of the heating element of the heating device shown in Fig. 9 .

FIG. 11 shows an enlarged view of a partial detail of a heat generating component of an embodiment of the present disclosure.

FIG. 12 shows a flowchart of a method for manufacturing a heat generating body according to an embodiment of the present disclosure.

In the respective drawings, the same or corresponding reference numerals denote the same or corresponding parts.

Detailed ways

Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

As used herein, the term "comprise" and its variants mean open inclusion, ie "including but not limited to". The term "or" means "and/or" unless otherwise stated. The term "based on" means "based at least in part on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment." The term "another embodiment" means "at least one further embodiment". The terms "upper", "lower", "front", "rear" and other words indicating placement or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the principles of the present disclosure, rather than indicating or implying References to elements must have a particular orientation, be constructed, or operate in a particular orientation, and thus should not be construed as limiting the disclosure.

As mentioned in the background, in traditional electric heating equipment, in order to ensure heating power, a small resistor is usually used to generate a large current. In the use of electric heating equipment, high currents will increase the risk of breakdown of the dielectric medium. To this end, sufficient dielectric gaps must be ensured between the resistance wire and the heating surface, as well as between the resistance wire and other surrounding components. A large dielectric gap means that the electric heating equipment is bulky and large in size, which has disadvantages in terms of portability and storage. In view of this, according to the embodiments of the present disclosure, a heating element with a greatly reduced required dielectric gap and a miniaturized electric heating stove including the heating element are provided. The heating element and the electric heating stove including the heating element according to the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.

1-3 illustrate structural details of an electrically heated stove 100 according to an embodiment of the present disclosure. As shown in FIGS. 1-3 , the electric heating stove 100 may include: a heating component 10 , a casing 20 and a heating panel 30 . Housing 20 may include one or more heating holes 21 . The heat generating component 10 is configured to generate heat to heat a cooking utensil such as a pan. The heat generating component 10 may be disposed right under the heating hole 21 . The heating panel 30 is arranged right above the heating component 10 . The heating panel 30 is configured to support a cooking appliance. In some embodiments, heating panel 30 may be made of glass-ceramic. When the heating component 10 generates heat, the heat can be transferred to the heating panel 30 , and then the object to be heated is heated through the heating panel 30 .

In some embodiments, housing 20 may be implemented in multiple pieces to facilitate assembly of the device. As shown in FIGS. 2 and 3 , the housing 20 may include an upper cover 25 and a lower cover 23 . The heat generating component 10 may be fixedly held between the upper cover 25 and the lower cover 23 . In some embodiments, the upper cover 25 and the lower cover 23 can be fixed together with screws 27 , and the heating component 10 is clamped between the upper cover 25 and the lower cover 23 . The upper cover 25 may include a heating hole 21 . The heating panel 30 may be installed in the heating hole 21 . As an example, the heating panel 30 is removably attached to the upper cover 25 (eg, by snapping). In the illustrated embodiment, the heating apertures 21 and heating panels 30 are shown as circular in shape, which is exemplary only. The heating hole 21 and the heating panel 30 may also be formed in other suitable shapes, such as a rectangle. Furthermore, in the illustrated embodiment, only one heating aperture 21 and one heating panel 30 are shown. This is exemplary only. The number of heating holes 21 and heating panels 30 may be multiple, for example, two, three or more, so as to provide simultaneous heating of multiple objects through the oven. In some embodiments, the electric heating stove 100 may include one or more foot pads 29 disposed at the bottom of the casing 20 , and the entire electric heating stove 100 may be supported by the foot pads 29 . The foot pad 29 can separate a gap between the main body of the electric heating stove 100 and supporting surfaces such as table tops and grounds. The foot pads not only provide thermal insulation, but also prevent sliding, ensuring the safe use of equipment.

In some embodiments, as shown in FIGS. 2 and 3 , the heat generating component 10 may include a plurality of heat generating bodies 12 arranged side by side. The heat generating body 12 may be configured in an elongated shape. As an example, the heat generating body 12 may be formed in a thin column shape, a thin strip shape, or a sheet shape. The heating element 12 can be cut to an appropriate size according to the size of the heating hole 21 . The number of heating elements 12 can be adjusted according to the heating

The size of the hole 21 and/or the heating power of the device are selected. A plurality of heating elements 125 arranged side by side are installed on the mounting frame 14 . The mounting frame 14 can be made of a material with good thermal insulation capability.

The mounting frame 14 not only supports the heating element 12 , but also can thermally isolate the heating element 12 from other components of the electric heating stove 100 . .

In some embodiments, as shown in FIG. 2 , the electric heating stove 100 may further include a discoloration component 32 . The color changing member 32 is configured to change color above a predetermined temperature. The color changing component 0 32 may be configured to provide an indication that the heat generating components of the electrically heated stove 100 are in a high temperature state.

After the electric heating stove 100 finishes cooking food, the heating panel of the electric heating stove 100 may still be in a high temperature state, and if the user accidentally touches the heating panel, it may easily burn the user. Can pass through the setting of discoloration part 32, when discoloration part 32 is in the

When the temperature is dangerous, the color-changing parts show different colors to remind users to avoid touching the heating panel. In some embodiments, color changing component 32 may be configured to contact heating panel 30 . As an example, the color changing member 32 may be arranged on the outer periphery of the heating panel so as to be directly visible from the outside. The discoloration component 32 can be configured in any other suitable position, as long as the discoloration component 32 can reflect the temperature state of the heating panel 20 . alternatively,

The discoloration component 32 may be in contact with the heating panel and/or the heating element, or the discoloration 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 can be a ring-shaped component, and such a shape can be observed from an angle range of 360°. It should be understood that this is exemplary only and that the color changing member 32 may be formed in any other suitable shape.

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

The stove 100 is powered. The electric heating stove 100 may further include a control assembly 40 . The manipulation assembly 40 may include components such as a user interface and a control circuit board. The user interface can accept user input, for example, to set the heating temperature, to set the heating mode, and so on. The user interface can also provide an indication of the operating status of the electric heating stove 100 to the user, such as providing a temperature display, an operation mode display, and the like. The control component 40 is also configured to control the operation of the electric heating stove 100 , for example, the heating power of the heating component 10 can be controlled according to the user's input, so as to provide required heating. Considering that these components are not the focus of the embodiments of the present disclosure, detailed descriptions thereof are omitted.

4-7 show structural details of the heat generating body 12 according to an embodiment of the present disclosure. In some embodiments, as shown in FIGS. 4-5 , the heating element 12 includes a first oxide ceramic layer 122 , a second oxide ceramic layer 126 and is arranged between the first oxide ceramic layer 122 and the second oxide ceramic layer 122 . Circuit layer 124 between ceramic layers 126 . The first oxide ceramic layer 122 and the second oxide ceramic layer 126 are sintered to each other to completely surround the circuit layer 124 therebetween.

According to an embodiment of the present disclosure, the heat generating body 12 is formed as a sandwich structure, and the circuit layer 124 is completely surrounded on the outside by the first oxide ceramic layer 122 and the second oxide ceramic layer 126 without being exposed anywhere. The first oxide ceramic layer 122 and the second oxide ceramic layer 126 generally have a relatively high melting temperature and are stable in high temperature environments. In addition, the first oxide ceramic layer 122 and the second oxide ceramic layer 126 have good electrical insulation properties and can effectively prevent current breakdown. According to the sandwich structure of the heating element 12 in the embodiment of the present disclosure, the first oxide ceramic layer 122 and the second oxide ceramic layer 126 can provide the heating element 12 with good dielectric properties. When the heating element 12 is used in the electric heating stove 100, the dielectric gap for the heating element 12 can be greatly reduced, or even zero. The heating element 12 can be directly separated from the heating panel 30 by a small gap, or can be in direct contact, both of which can ensure good dielectric properties. Because the circuit layer is covered between the oxide ceramic layers without partial exposure, the oxidation resistance of the circuit layer is greatly improved, and it can withstand higher heat-resistant temperatures, up to 1000 degrees Celsius, 1200 degrees Celsius, 1500 degrees Celsius, or even 2000 degrees Celsius. Celsius, and significantly increased the service life of heating components.

In some embodiments, the oxide ceramics in the first oxide ceramic layer 122 and the second oxide ceramic layer 126 may include a single oxide ceramic, such as zirconia, magnesia, alumina, beryllia, titania, and the like. For example, due to its ultra-high temperature resistance, zirconia has significant benefits in terms of performance. Under the same size conditions, the heating temperature that the electric heating stove 100 can provide can be further increased. Alumina has significant benefits due to its low cost nature. In other embodiments, the oxide ceramic may comprise composite oxide ceramics such as composites of zirconia, magnesia, alumina, beryllia, titania, etc., as examples spinel, mullite, lead zirconate titanate PZT ceramics etc.

The circuit layer 124 may be composed of metal wires and generates heat when energized. The metal wire can be made of appropriate metal materials such as copper and tungsten-molybdenum alloy. In some embodiments, as shown in FIGS. 4 and 5 , the circuit layer 124 may be formed in the form of a wire pattern. The circuit layer 124 may be printed on the surface of the first oxide ceramic layer 122 . The heat generating body 12 may be configured in an elongated shape. Although in the illustrated embodiment, the heat generating body 12 is formed in a sheet shape. It should be understood that this is only exemplary, and the heating element 12 can be formed into a columnar shape, a strip shape or other similar shapes; 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 That's it.

In some embodiments, as shown in FIGS. 4 and 5 , the circuit layer 124 includes a heat generating body 1244 and electrodes 1242 in a pattern shape. The circuit layer 124 may be powered through the electrodes 1242 . In the embodiments of FIG. 4 and FIG. 5 , the electrodes 1242 are respectively arranged at both ends of the heat generating body 1242 . This has advantages in terms of manufacture and assembly of the heating element 12 . Considering that the heating body is formed in an elongated shape, when the electrode 1242 is formed at one end of the heating body 1242, two electrodes are simultaneously provided on the elongated circuit layer 124, which raises higher requirements for the manufacturing workers. . The two electrodes need to be separated by a sufficient dielectric distance from each other to avoid a short circuit between the two. However, when the electrodes 1242 are arranged at both ends of the heating body 1242, the distance between the two electrodes 1242 is far enough, so there is no such risk. In addition, when the electrodes 1242 are arranged at both ends of the heat-generating body 1242 , when multiple heat-generating bodies 12 are arranged side by side, this is beneficial for the modularization of the heat-generating assembly 10 . Although in the illustrated embodiment, the electrodes 1242 are respectively arranged at both ends of the heat generating body 1242 , this is merely exemplary, and the electrodes 1242 may be respectively arranged at other positions of the heat generating body 1242 spaced apart from each other by a sufficient distance.

In some embodiments, the second oxide ceramic layer 126 may include a through-hole 1262 penetrating through its thickness direction, and the position of the through-hole 1262 corresponds to the position of the electrode 1242 on the circuit layer 124, so that the circuit layer 124 receives the Power is supplied through the conductive pillars 128 in the holes 1262 . The heat generating body 12 also includes a conductive post 128 disposed in the through hole 1262 , the conductive post 128 is soldered to the second oxide ceramic layer 126 and electrically connected to the electrode 1242 . Such an electrode connection arrangement is advantageous in terms of modularity of the heat generating component 10 by providing the conductive post 128 protruding away from the surface on one surface side of the oxide ceramic layer. In addition, this can effectively utilize the thickness of the heat insulation layer in the thickness direction of the electric heating stove 100 to conveniently realize power supply to the heating element 12 .

In addition, such an electrode connection structure is advantageous in the manufacture of the heating element. This is because the heating element adopts the structure of two oxide ceramic layers. In the manufacturing process of the heating element, the bonding between the two oxide ceramic layers is involved. The electrode 1242 is damaged during high temperature sintering.

In other embodiments (not shown), instead of protruding from the surface of the circuit layer 12, the conductive pillars 128 can also be arranged parallel to the surface of the circuit layer 12, so that the heating element 12 can The electrical connection structure of the circuit layer 12 is provided in the extending direction of the circuit layer 12 . This can also similarly achieve the benefits of modularization of the circuit connections described above.

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 ranges are only 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, especially, a temperature above 1000 degrees Celsius, above 1200 degrees Celsius, or above 1500 degrees Celsius, which is good for daily cooking needs.

8-11 show structural details of the heat generating component 10 according to an embodiment of the present disclosure. As shown in FIGS. 8-11 , the heating component 10 includes a plurality of heating elements 12 arranged side by side. The first oxide ceramic layer 122 of each heating body 12 is arranged facing the object to be heated to form a heating surface. The heating surface of the heating element 10 may directly face the heating panel arranged above it. In some embodiments, the heating surface of the heat generating body 10 may be in direct contact with the heating panel. In other embodiments, the heating surface of the heating element 10 may be separated from the heating panel by a distance. The heating element 12 is mounted on a mounting frame 14 . The mount 14 is configured to support the heat generating body 12 . In some embodiments, in addition to the function of supporting the heating element 12, the mounting frame 14 can also be configured to thermally isolate the heating element 12 from surrounding components.

In some embodiments, as shown in FIGS. 9-11 , the mounting bracket 14 includes a thermal insulator 142 including a peripheral wall and a bottom wall. The peripheral wall and the bottom wall jointly define a central groove suitable for arranging the heating element 12 . The heat generating body 10 may be disposed in the central groove. As an example, the central groove may include a peripheral flange, on which the heat generating body 10 may be supported with the bottom suspended. In this way, the heating element 10 is physically separated from the heat insulator 142 except for the installation parts, so as to reduce the heat transfer between the heating element and the heat insulator 142, so that the heat of the heating element 10 can be obtained as much as possible. Radiates outward through the heated surface. In some embodiments, instead of the central groove, the mounting frame 14 may include a flat supporting surface, and the heating element 12 may be directly disposed on the top surface of the mounting frame 14 . In some embodiments, the insulation 142 may include high temperature resistant insulating rockwool. It should be understood that this is exemplary only, and the heat insulator may be made of any other suitable high temperature resistant material.

In some embodiments, as shown in FIGS. 9-11 , the heating component 10 includes a plurality of heating elements 12 arranged side by side. Therefore, it is necessary to provide a power supply line for each heating element 12 . Considering the high temperature environment of the heating element, the layout of the power supply line of the heating element 12 is an important consideration in the design of the heating element 10 . It is not only necessary to keep the wires as far away from the heating body as possible to avoid premature aging of the power supply line, but also to prevent too many wires from complicating the installation and increasing the difficulty of maintenance.

In some embodiments, as shown in FIGS. 9-11 , the electrodes 1242 of the heating element 12 are located at opposite ends of the heating element, so that the wiring circuits for multiple heating elements 12 can be implemented in a modular manner. In order to realize the power supply circuit with the heating element 12, a plurality of heating elements 12 adopt an integrated power supply wiring board. As an example, a first wiring board 143 and a second wiring board 143 may be provided. The first wiring board 143 can be connected to the first electrode 1242 of each heating body 12 , and the second wiring board 143 can be connected to the second electrode 1242 of each heating body 12 . The first wiring board 143 and the second wiring board 143 may be connected to a power source via wires 52, respectively. The electrodes of each heating body 12 include a first electrode 1242 located at a first end of the heating body and a second electrode 1242 located at an opposite second end of the heating body, and the first electrode 1242 of each heating body 12 is connected to a first wire The plate 143 , the second electrode 1242 of each heat generating body 12 is connected to the second terminal plate 143 . It should be understood that this is only exemplary, and some heating elements of the plurality of heating elements 12 may also be connected by independent wires, although this may increase the complexity of the connection.

The mounting frame 14 may include a first side suitable for mounting the heating element 12 and a second side opposite to the first side, and the first wiring board 143 and the second wiring board 143 are arranged on the second side of the mounting frame 14 for via The body of the mounting bracket 14 is thermally isolated from the heating element 12 . Thus, the first wiring board 143 and the second wiring board 143 can be prevented from being overheated through the thermal isolation provided by the mounting frame 14 . In some embodiments, the first wiring board 143 is opposite to the second wiring board 143

The heating elements 12 are symmetrically arranged on both sides of the mounting frame 14 . Such an arrangement can improve the convenience of wiring and the heat balance of this device.

In some embodiments, as shown in FIGS. 9-11 , the mounting frame 14 includes a plurality of through holes 147 adapted to receive the conductive posts 128 . The electrodes 1242 of each heating element 12 are electrically connected to the corresponding wiring board 143 via the corresponding conductive posts 128 . Each heating element 12 can conduct

The posts 128 are electrically connected with corresponding terminal blocks 143 . By extending the conductive pillars 128 in a direction perpendicular to the heating surface of the heating element 120 , the wires 52 can be kept away from the heat source.

In some embodiments, as shown in FIGS. 9 and 10 , the heat generating assembly 10 further includes a heat insulating sheet 145 arranged between the corresponding wiring board 143 and the mounting frame 14 . The shape of the heat insulating sheet 145 may be similar to that of the wiring board 143 . As an example, the thermal insulation sheet 145 may be a mica sheet. should

Understand that this is exemplary only. The shape and material of the heat insulating sheet 145 can be any other suitable material. The heat transfer from the heating element 10 to the terminal block 143 can be further reduced through the heat insulating sheet.

In some embodiments, as shown in FIG. 9 and FIG. 10 , the heat generating component 10 further includes a heat insulating member 144 arranged around the mounting frame 14 . In the embodiment shown in Figures 9 and 10, the insulating

The member 144 is formed as a housing structure surrounding the mount 14 . The insulation can be made of rigid material O. In addition to providing thermal insulation, it can also provide rigid support to the mounting frame.

In some embodiments, thermal insulation 144 may be formed as a thermal insulation assembly. The heat insulation component may include metal parts for structural support, so as to ensure the structural support strength of the heating component 10 . In the case that the heat-generating component 10 adopts heat-insulating cotton and other parts that are easy to disperse, the heat-insulating member 144 can surround

The insulation wool arrangement acts as a container. The thermal insulation assembly may also include components made of high temperature resistant flexible material 5 , examples of which may include aerogel, silica gel, and the like. The insulating part has some flexibility to compensate for the manufacturing tolerances of the mounting frame; in addition, vibrations of the mounting frame can be absorbed. As an example, the insulating ring may include silicone pads and/or aerogels, among others.

In some embodiments, the heating component 10 further includes a flexible support portion 149 disposed at the bottom of the mounting frame 14 . The flexible support part 149 may be in the form of silicone, for example. The flexible supporting part 149 can be installed under the installation frame 14 to support the installation frame. In some embodiments, the flexible support part 149 may be disposed on the bottom wall of the heat insulator 144 . Thus, reliable support can be provided for the heating component.

FIG. 12 shows a flowchart of a method 300 for manufacturing a heat generating body according to an embodiment of the present disclosure. 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, the 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 location on the first oxide ceramic layer 122 . As an example, a well-proportioned metal resistor paste is printed on a semi-finished blank to form a heating circuit. After the heating circuit is formed, metal electrodes are printed at appropriate positions of 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 (for example, oxygen-free sintered) to each other to completely surround the circuit layer 124 therebetween.

In some embodiments, providing the second oxide ceramic layer 126 further includes: drilling a hole at a second predetermined position of the second oxide ceramic layer 126 to form an electrode connection hole. In some embodiments, in order to realize the 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 can be hot-pressed before anaerobic sintering. An oxide ceramic layer 122 and a second oxide ceramic layer 126 . Preliminary bonding of the first oxide ceramic layer 122 and the second oxide ceramic layer 126 may be achieved by hot pressing and an oxygen-free environment between the first oxide ceramic layer 122 and the second oxide ceramic layer 126 may be formed. In some embodiments, the hot-pressed first oxide ceramic layer 122 and the second oxide ceramic layer 126 may be further trimmed to be cut into the size of the final product. In some embodiments, the combination of the first oxide ceramic layer 122 and the second oxide ceramic layer 126 may also be heated and planarized The outer surface. This is necessary to form a flat sheet-like heating element. In some embodiments, if the step of heating and flattening fails to meet the product requirements once, it needs to be repeated several times until the predetermined requirements are met. In some embodiments, after anaerobic sintering of the first oxide ceramic layer 122 and the second oxide ceramic layer 126 , the conductive pillar 128 may be welded at the electrode connection hole.

The application example of the heating element according to the embodiments of the present disclosure has been described above by taking the electric heating furnace as an exemplary application scenario. It should be understood that this is only exemplary, and the heating element can also be applied to electric heating pans, water heaters, electric ovens, electric ovens, electric baking pans and other electrical equipment requiring electric heating.

In addition, while operations are depicted in a particular order, this should be understood to require that such operations be performed in the particular order shown, or in sequential order, or that all illustrated operations should be performed to achieve desirable results. Under certain circumstances, multitasking and parallel processing may be advantageous. Likewise, while the above discussion contains several specific implementation details, these should not be construed as limitations on the scope of the disclosure. Certain features that are described in the context of separate embodiments can also be implemented in combination in a single implementation. Conversely, various features that are described in the context of a single implementation can also be implemented in multiple implementations separately or in any suitable subcombination.

Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are merely example forms of implementing the claims.

Having described various embodiments of the present disclosure above, the foregoing description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and alterations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principle of each embodiment, practical application or technical improvement in the market, or to enable other ordinary skilled in the art to understand each embodiment disclosed herein.

Claims (24)

1. A heating element (12), comprising: 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 The dioxide ceramic layers (126) are sintered to each other to completely surround the circuit layer (124) therebetween. 2. The heating body (12) according to claim 1, wherein the circuit layer (124) is printed on the surface of the first oxide ceramic layer (122). 3. The heating element (12) according to claim 1, wherein the heating element (12) is configured in a column shape, a strip shape, or a sheet shape. 4. The heating body (12) according to claim 1, wherein the circuit layer (124) comprises a heating body (1244) and electrodes (1242) respectively arranged at both ends of the heating body (1244) , supplying power to the circuit layer (124) via the electrode (1242). 5. The heating element (12) according to claim 1, wherein the second oxide ceramic layer (126) comprises a through hole (1262) penetrating along its thickness direction, and the position of the through hole (1262) is the same as The positions of the electrodes (1242) on the circuit layer (124) correspond such that the circuit layer (124) is powered via the conductive posts (128) received in the vias (1262). 6. The heating element (12) according to claim 5, further comprising a conductive post (128) arranged in the through hole (1262), the conductive post (128) being soldered to the second oxide The ceramic layer (126) is electrically connected to the electrode (1242). 7. 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 One or more selected from zirconium oxide, magnesium oxide, aluminum oxide, beryllium oxide, titanium dioxide and combinations thereof. 8. 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 ohm to 10 ohm, after the heating element is powered The heating temperature is greater than or equal to 700 degrees Celsius. 9. A heating component (10), comprising: A plurality of heating elements (12) according to any one of claims 1-8 arranged side by side, the first oxide ceramic layer (122) of each heating element (12) is arranged facing the object to be heated to form a heating surface; and The mounting frame (14) is configured to support the heating element (12). 10. The heating assembly (10) according to claim 9, further comprising a first wiring board (143) and a second wiring board (143) separated from the first wiring board (143), each of the heating The electrodes of the body (12) include a first electrode (1242) positioned at a first end of the heating body (1244) and a second electrode (1242) positioned at an opposite second end of the heating body (1244), each of the heating bodies ( 12) the first electrode (1242) 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). 11. The heating assembly (10) according to claim 10, wherein the first wiring board (143) and the second wiring board (143) are symmetrically arranged at the positions relative to the heating body (12). on both sides of the mounting bracket (14). 12. The heating component (10) according to claim 10, wherein the mounting bracket (14) comprises a first side suitable for mounting the heating element (12) and a second side opposite to the first side , the first wiring board (143) and the second wiring board (143) are arranged on the second side of the mounting frame (14) to communicate with the mounting frame (14) via the body The heating element (12) is thermally isolated. 13. The heating assembly (10) according to claim 12, wherein the mounting frame (14) comprises a plurality of through holes (147) suitable for receiving conductive posts (128), so that each of the heating elements ( 12) The electrodes (1242) are electrically connected to corresponding wiring boards (143) via corresponding conductive posts (128). 14. The heating assembly (10) according to claim 9, wherein the mounting frame (14) comprises a heat insulator (142), the heat insulator (142) comprises a circumferential wall and a bottom wall, and the circumferential wall and the bottom The wall defines a central recess suitable for arranging said heat generating body (12). 15. The heat generating component (10) according to any one of claims 10-14, further comprising a heat insulating sheet (145) arranged between the corresponding wiring board (143) and the installation frame (14). 16. The heat generating component (10) according to any one of claims 10-14, further comprising a heat insulation component arranged around the outer circumference of the mounting bracket (14). 17. The heating assembly (10) according to any one of claims 10-14, further comprising a flexible support portion (149) located at the bottom of the mounting frame (14). 18. An electric heating stove, comprising: Housing (20), including heating holes (21); a heating panel (30), mounted in said heating hole (21); and The heating assembly (10) according to any one of claims 9-17, which is fixed into the housing (20) below the heating panel (30). 19. The electric heating stove according to claim 18, further comprising a discoloration component (32) arranged on the outer periphery of the heating panel, and the discoloration component (32) is configured to be heated to a predetermined temperature by the heating panel. Change color when above temperature. 20. A method for manufacturing the heating element (12) according to any one of claims 1-8, comprising: providing a first oxide ceramic layer (122) and a second oxide ceramic layer (126); forming a circuit layer (124) at a first predetermined location on said first oxide ceramic layer (122); and sintering the first oxide ceramic layer (122) and the second oxide ceramic layer (126) such that the first oxide ceramic layer (122) and the second oxide ceramic layer (126) are mutually Sintered together to completely surround the circuit layers (124) therebetween. 21. The method of claim 19, wherein providing the second oxide ceramic layer (126) further comprises: A hole is punched at a second predetermined position of the second oxide ceramic layer (126) to form an electrode connection hole. 22. The method of claim 19, further comprising hot pressing the first oxide ceramic layer (122) and the second oxide ceramic layer (126) prior to oxygen-free sintering layer (122) and said second oxide ceramic layer (126). 23. The method of any one of claims 20-22, further comprising: heating the combination of the first oxide ceramic layer (122) and the second oxide ceramic layer (126) and planarizing the first oxide ceramic layer (122) and/or the second The outer surface of the oxide ceramic layer (126). 24. The method according to claim 21, further comprising soldering conductive electrodes at the electrode connection holes after anaerobic sintering of the first oxide ceramic layer (122) and the second oxide ceramic layer (126). column (128).

Images