CN106923686B - Pot cover suitable for electromagnetic heating and electric rice cooker with same - Google Patents

Abstract

The invention discloses a pot cover suitable for electromagnetic heating and an electric rice cooker with the same. The pot cover suitable for electromagnetic heating comprises: an insulating cover plate, a magnetic conduction layer and a conductive layer. The magnetically conductive layer is arranged on the insulating cover plate, and the magnetically conductive layer extends along the circumferential direction of the insulating cover plate; the conductive layer is arranged on the insulating cover plate, and the conductive layer and The magnetic conductive layers are connected in series to form a loop. According to the pot lid suitable for electromagnetic heating of the present invention, since the magnetically conductive layer and the conductive layer are connected in series, when the current is induced, the current will flow along the magnetically conductive layer and the conductive layer. In other words, heat can be generated through the conductive layer and the magnetically conductive layer, and the positions of the conductive layer and the magnetically conductive layer can be set as required, so that the heating of the predetermined position can be realized. In the case of a reasonable arrangement of the magnetically conductive layer and the conductive layer, it can also Appropriately expand the heating area of the pot cover.

Description

Pot cover suitable for electromagnetic heating and electric rice cooker with same

technical field

The invention relates to the technical field of household appliances, in particular to a pot cover suitable for electromagnetic heating and an electric rice cooker with the same.

Background technique

In related technologies, in order to achieve three-dimensional heating, high-end electric cookers often also have heating elements on the upper cover, so as to heat the upper cover and solve the problem of insufficient heating of the surface of the upper layer of rice. IH electromagnetic induction technology is widely used in the auxiliary heating of the upper cover due to its advantages of fast and easy control. However, in order to make the entire upper cover evenly heat, it is often necessary to arrange heating coils for induction on the entire upper cover in a large area, and because the space of the upper cover is limited, the upper cover should also be provided with steam outlets and to deal with the overflow of rice soup. Large-scale induction heating coils have to be sealed in a wide range, so that the structure of the upper cover becomes complicated and the cost increases.

Contents of the invention

The present invention aims to solve one of the technical problems in the related art at least to a certain extent. Therefore, the first aspect of the present invention is to provide a pot cover suitable for electromagnetic heating, which can expand the heating area to a certain extent.

The second aspect of the present invention is to provide an electric rice cooker, which is provided with the above-mentioned pot cover suitable for electromagnetic heating.

A pot cover suitable for electromagnetic heating according to an embodiment of the present invention includes: an insulating cover plate, a magnetic conductive layer and a conductive layer. The magnetically conductive layer is arranged on the insulating cover plate, and the magnetically conductive layer extends along the circumferential direction of the insulating cover plate; the conductive layer is arranged on the insulating cover plate, and the conductive layer and The magnetic conductive layers are connected in series to form a loop.

According to the pot lid suitable for electromagnetic heating according to the embodiment of the present invention, since the magnetic permeable layer and the conductive layer are connected in series, when the current is induced, the current will flow along the magnetic permeable layer and the conductive layer. In other words, heat can be generated through the conductive layer and the magnetically conductive layer, and the positions of the conductive layer and the magnetically conductive layer can be set according to needs, so that the heating of the predetermined position can be realized. Appropriately expand the heating area of the pot cover.

In addition, the pot lid suitable for electromagnetic heating according to the above-mentioned embodiments of the present invention may also have the following additional technical features:

According to an embodiment of the present invention, the conductive layer includes a first conductive segment and a second conductive segment separated from each other, and the first conductive segment, the second conductive segment and the magnetic conductive layer are connected in series to form a loop .

Further, one end of the first conductive segment is connected to one end of the magnetically permeable layer and extends in a detour away from the magnetically permeable layer, and one end of the second conductive segment is connected to the other end of the magnetically permeable layer. One end is connected and extends in a detour away from the magnetic permeable layer, and the other end of the first conductive segment is connected to the other end of the second conductive segment.

Further, both the first conductive segment and the second conductive segment are located outside the magnetically permeable layer, and the first conductive segment includes a plurality of first arcs arranged at intervals from the inside to the outside and sequentially connected in series. Conductive strips, the second conductive section includes a plurality of second arc-shaped conductive strips arranged at intervals from the inside to the outside and sequentially connected in series, a first arc-shaped conductive strip located on the innermost side is connected to the magnetic permeable layer, and The innermost second arc-shaped conductive strip is connected to the magnetic permeable layer, and the outermost first arc-shaped conductive strip is connected to the outermost second arc-shaped conductive strip.

Further, the first arc-shaped conductive strip, the second arc-shaped conductive strip and the magnetic conduction layer are in the shape of concentric arcs.

According to an embodiment of the present invention, the conductive layer is arranged outside the magnetically permeable layer, and the conductive layer includes a plurality of spiral rings spaced apart from each other, and each of the spiral rings is along the insulating cover plate. The circumferential direction of the coil extends helically from inside to outside, a plurality of the helical rings are helical in the same direction and are nested, and a plurality of the helical rings are connected in series.

According to an embodiment of the present invention, the magnetic permeable layer is annular with a gap, and the conductive layer is connected to both ends of the notch of the magnetic permeable layer to form a loop.

Further, an induction heating layer located inside the magnetic permeable layer is provided on the insulating cover.

Optionally, the magnetic permeable layer has a circular shape with a gap, and the conductive layer is symmetrical about the axis of symmetry of the magnetic permeable layer.

According to some embodiments of the present invention, the magnetically conductive layer is located in the middle of the insulating cover, and the conductive layer is connected to the magnetically conductive layer and covers outward to the periphery of the insulating cover.

Further, the periphery of the insulating cover plate has a flange portion, and the conductive layer is covered to be adjacent to the flange portion or the conductive layer is covered to the flange portion.

According to some embodiments of the present invention, the width of the magnetic permeable layer is greater than the width of the conductive layer.

According to some embodiments of the present invention, the conductive layer is a magnetic resistance conductive layer, and the insulating cover is a ceramic cover with an open bottom.

According to some embodiments of the present invention, the conductive layer is in the shape of a curved strip and covers the bottom wall of the insulating cover.

Further, at least one of the conductive layer and the magnetic permeable layer comprises a plurality, each of the conductive layers is connected in series with at least one of the magnetic permeable layers to form a loop, and each of the magnetic permeable layers is It is connected in series with at least one of the conductive layers to form a loop.

Advantageously, the conductive layer includes a plurality of conductive layers, and the plurality of conductive layers are connected in series with the magnetic conductive layer to form a loop.

Further, the magnetic permeable layer includes a plurality, and the multiple magnetic permeable layers are connected in parallel to the conductive layer to form a loop.

Advantageously, the magnetic permeable layer includes a plurality of mutually independent, and the conductive layer includes a plurality of mutually independent and one-to-one corresponding to the plurality of magnetic permeable layers, and each of the conductive layers is connected to the corresponding The magnetic conductive layers are connected in series to form a loop.

In some embodiments of the present invention, the total length of the conductive layer is greater than the circumferentially extending length of the magnetic permeable layer. The electric rice cooker according to the embodiment of the second aspect of the present invention includes: a cooker body, a cover body and an induction coil. There is an inner pot in the pot; the cover is movable between the positions of opening or closing the inner pot, the cover includes a pot cover and a steam valve, and the pot cover is the above-mentioned pot cover; The induction coil corresponds to the magnetically conductive layer on the pot cover, and the induction coil is arranged away from the steam valve.

Description of drawings

Fig. 1 is a schematic diagram of a pot cover suitable for electromagnetic heating according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of another embodiment of the pot cover suitable for electromagnetic heating of the present invention.

Reference signs:

Pot cover 100, insulating cover plate 11, induction heating layer 111, flange portion 112, magnetically conductive layer 12, one end 121 of the magnetically conductive layer, the other end 122 of the magnetically conductive layer, notch 123, conductive layer 13, first conductive segment 131 , the second conductive segment 132 , the first curved conductive strip 137 , and the second curved conductive strip 138 .

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

A pot cover 100 suitable for electromagnetic heating according to an embodiment of the present invention will be described in detail below with reference to FIGS. 1 and 2 .

Referring to FIG. 1 , a pot cover 100 suitable for electromagnetic heating according to an embodiment of the present invention includes: an insulating cover plate 11 , a magnetically conductive layer 12 and a conductive layer 13 .

Specifically, the magnetically permeable layer 12 may be disposed on the insulating cover 11 , and the magnetically permeable layer 12 may extend along the circumferential direction of the insulating cover 11 . The conductive layer 13 can be disposed on the insulating cover 11 , and the conductive layer 13 can be connected in series with the magnetic permeable layer 12 to form a loop. Thus, the pot cover 100 can be heated together through the magnetic conductive layer 12 and the conductive layer 13 , so that the heating area of the pot cover 100 can be enlarged to a certain extent.

In the cooking utensil with the pot cover 100, the induction coil can be made to be opposite to the magnetic conduction layer 12 on the pot cover 100. Therefore, during the electrification process of the induction coil, an induced magnetic field will be generated after the alternating current passes through the magnetic conduction layer 12. , the magnetically permeable layer 12 located in the alternating induced magnetic field will generate an induced electric field, because the conductive layer 13 is connected in series with the magnetically permeable layer 12, the induced electric field produced by the magnetically permeable layer 12 will be in the magnetically permeable layer 12 and the conductive An electric current is generated in the layer 13 , and the action of the electric current generates heat to heat the pot lid 100 .

Wherein, those skilled in the art can understand that, the induction coil and magnetic permeable layer 12 that the present invention says is opposite (or correspond to) means: when the induction coil is energized, the induced magnetic field that the induction coil produces will cover the magnetic permeable layer 12. at least partly.

In addition, the coverage of the induction coil referred to in the present invention refers to: the coverage of the induction magnetic field generated by the induction coil when the induction coil is energized; or the effective coverage of the induction magnetic field generated by the induction coil, that is to say, Within the coverage area, the induced magnetic field generated by the induction coil is relatively strong, and an appropriate induced electromotive force can be generated on the magnetic permeable layer 12 through the induced magnetic field to form an induced electric field to heat the pot cover. For example, the induction coil covering the entire magnetic permeable layer 12 in the present invention means that the induced magnetic field generated by the induction coil covers the entire magnetic permeable layer 12 .

According to the pot cover 100 suitable for electromagnetic heating according to the embodiment of the present invention, since the magnetic permeable layer 12 and the conductive layer 13 are used in series, when the current is induced, the current will flow along the magnetic permeable layer 12 and the conductive layer. 13 in circulation. In other words, heat can be generated by the conductive layer 13 and the magnetically conductive layer 12, and the positions of the conductive layer 13 and the magnetically conductive layer 12 can be set according to needs, so that heating to a predetermined position can be realized, and the magnetically conductive layer 12 and the conductive layer 13 can be arranged reasonably Under the situation, the heating area of the pot cover 100 can also be expanded appropriately.

In addition, those of ordinary skill in the art can understand that both the magnetic permeable layer 12 and the conductive layer 13 can generate heat through electric current, and the conductive layer 13 and the magnetic permeable layer 12 can be made of the same or different materials according to actual use. For example, the magnetic permeable layer 12 can be made of iron, and the conductive layer 13 can be made of iron, aluminum, copper and other materials.

In order to increase the density of the conductive layer 13, the conductive layer 13 may be arranged in a serpentine, spiral or other manner. For example, the conductive layer 13 may be arranged to extend inwardly from the periphery of the insulating cover 11 to the middle of the conductive layer 13 in a detour, and two ends of the conductive layer 13 may be connected to two ends of the magnetically conductive layer 12 respectively. The conductive layer 13 of some embodiments of the present invention will be described below with reference to the accompanying drawings.

According to a specific embodiment of the present invention, referring to FIG. 1, the conductive layer 13 may include a first conductive segment 131 and a second conductive segment 132 spaced apart from each other, the first conductive segment 131, the second conductive segment 132 and the magnetic permeable layer 12 Can be connected in series to form a loop. Thus, current can flow through the loop formed by the conductive layer 13 and the magnetic conductive layer 12 , so that heat can be generated to heat the pot lid 100 .

In addition, the conductive layer 13 can also be in other shapes such as "Z" shape, "back" shape, etc., as long as it can ensure that the circuit can cover the pot lid 100 .

As shown in Figure 1, one end 133 of the first conductive segment 131 can be connected with one end 121 of the magnetically permeable layer 12 and extend in a detour towards a direction away from the magnetically permeable layer 12, and one end 134 of the second conductive segment 132 can be connected to the magnetically permeable layer The other end 122 of 12 is connected and extends in a detour away from the magnetic permeable layer 12 , and the other end 135 of the first conductive segment 131 may be connected to the other end 136 of the second conductive segment 132 . Thus, a closed loop can be formed between the conductive layer 13 and the magnetically conductive layer 12 , so that the pot lid 100 can be heated.

Further, referring to FIG. 1 , the first conductive segment 131 and the second conductive segment 132 can both be located on the outside of the magnetically permeable layer 12 (for example, the side away from the center line of the pot cover 100 in FIG. 1 ), the first conductive segment 131 It may include a plurality of first arc-shaped conductive strips 137 arranged at intervals from the inside to the outside and connected in series in sequence, and the second conductive segment 132 may include a plurality of second arc-shaped conductive strips 138 arranged at intervals from the inside to the outside and connected in series in sequence , a first arc-shaped conductive strip 137 located on the innermost side (for example, the side adjacent to the center line of the pot cover 100 in FIG. 138 may be connected to the magnetic conductive layer 12 , and the first arc-shaped conductive strip 137 located on the outermost side may be connected to the second arc-shaped conductive strip 138 located on the outermost side. Thereby, the heating area of the pot cover 100 can be expanded and the heating of the pot cover 100 can be made more uniform.

Further, the first arc-shaped conductive strip 137 , the second arc-shaped conductive strip 138 and the magnetic permeable layer 12 may be in the shape of concentric arcs. Thus, the pot cover 100 can be easily manufactured, and the heating uniformity of the pot cover 100 can also be ensured.

Certainly, the first arc-shaped conductive strip 137 , the second arc-shaped conductive strip 138 and the magnetic permeable layer 12 may also be in other shapes, such as nested rectangles, ovals, and the like. The present invention does not specifically limit the shapes of the first arc-shaped conductive strip 137 , the second arc-shaped conductive strip 138 and the magnetic permeable layer 12 , which can be adaptively selected according to needs in practical applications.

As shown in Figure 1, in some embodiments of the present invention, the conductive layer 13 can be arranged on the outside of the magnetically permeable layer 12 (for example, the side away from the center line of the pot cover 100 in Figure 1), and the conductive layer 13 can be It includes a plurality of spiral rings spaced apart from each other, and each spiral ring can spirally extend from the inside to the outside along the circumferential direction of the insulating cover plate 11. Multiple spiral rings can be helical in the same direction and nested, and multiple spiral rings can be connected in series. . Thus, it is equivalent to increasing the number of turns of the helical ring without changing the length of a single helical ring, so that the bottom wall of the inner pot is heated more evenly.

In addition, the number of helical rings can be two, three, four or five, etc. Of course, these multiple helical rings can also be connected in parallel or in series.

Preferably, a plurality of spiral rings can be connected in series, thereby facilitating the passage of current, so that the current at all places of the conductive layer 13 is substantially the same, thereby ensuring that the power at all places of the conductive layer 13 is consistent, and facilitates the uniform distribution of heat.

Specifically, in a specific embodiment of the present invention, there are two spiral rings, the two spiral rings are respectively connected to the two ends of the magnetic permeable layer 12, and the two spiral rings are formed along the circumferential direction of the insulating cover plate 11 by The inner-to-outer helix extends to the periphery of the insulating cover 11 , and in addition, the outer ends of the two helical rings can be connected together.

Referring to FIG. 1 , the magnetic permeable layer 12 can be annular with a notch 123 , and the conductive layer 13 can be connected to both ends of the notch of the magnetic permeable layer to form a loop. In this way, favorable conditions can be provided for heating the pot cover 100, and the magnetic conductive material can be saved and the cost can be reduced.

Further, as shown in FIG. 1 , the insulating cover 11 may be provided with an induction heating layer 111 located inside the magnetically permeable layer 12 (eg, the side adjacent to the centerline of the insulating cover 11 in FIG. 1 ). Thus, the heating of the central area of the bottom of the inner pot 100 can be realized through the induction heating layer 111 .

Specifically, the magnetically permeable layer 12 can be a region forming an induced electromotive force, the circular region in the middle of the magnetically permeable layer 12 is the induction heating layer 111 , and the area of the heating coil of the magnetic furnace must at least cover the induced electromotive force region of the magnetically permeable layer 12 . In this way, when the pot lid 100 is used for heating on a magnetic stove, the induction heating layer 111 can generate heat inductively, and the part of the magnetic conduction layer 12 that generates an induced electromotive force can generate heat by connecting with the conductive layer 13 . Thus, the heating area of the pot cover 100 can be enlarged.

Referring to FIG. 1 , both the conductive layer 13 and the magnetically permeable layer 12 may have axisymmetric shapes, and the symmetry axes of the conductive layer 13 and the magnetically permeable layer 12 may coincide.

Specifically, referring to FIG. 1 , the magnetically permeable layer 12 may be circular with a gap 123 , and the conductive layer 13 may be symmetrical about the symmetry axis of the magnetically permeable layer 12 . Thus, the heat distribution on the pot cover 100 can be made more uniform.

For example, in the example shown in FIG. 1 , both ends of the magnetically permeable layer 12 (for example, one end 121 and the other end 122 of the magnetically permeable layer 12 in FIG. 1 ) can be respectively connected to the conductive layer 13 . In this way, the magnetic conduction layer 12 can be made an uninterrupted whole, thus, a closed curved loop can be formed on the pot cover 100 , and the uniform heating of the pot cover 100 can be realized.

According to some embodiments of the present invention, referring to FIG. 1 , the magnetically permeable layer 12 may be located in the middle of the insulating cover 11 , and the conductive layer 13 may be connected to the magnetically permeable layer 12 and outwardly cover the periphery of the insulating cover 11 . Thus, not only the heating of the middle part of the insulating cover plate 11 can be realized through the magnetically conductive layer 12, but also the heating of the periphery of the insulating cover plate 11 can be realized through the conductive layer 13, and the conductive layer 13 is connected to the magnetically conductive layer 12, In this way, the heating area of the pot cover 100 can be enlarged.

Preferably, referring to FIG. 1 , the periphery of the insulating cover 11 may have a flange portion 112 , and the conductive layer 13 may cover the adjacent flange portion 112 or the conductive layer 13 covers the flange portion 112 . In this way, the coverage area of the conductive layer 13 can be enlarged to a certain extent, so that the heating area of the pot cover 100 can be enlarged.

In addition, it should be understood that the conductive layer 13 can cover the adjacent flange portion 112 or the conductive layer 13 can cover the flange portion 112 : at least a part of the insulating cover 11 can be located within the coverage of the conductive layer 13 . Since the conductive layer 13 can be in the form that each section is spaced apart, therefore, the coverage of the conductive layer 13 should include the gaps formed between the sections of the conductive layer 13 .

Referring to FIG. 1 , the width of the magnetic permeable layer 12 may be greater than that of the conductive layer 13 . Thus, the pot cover 100 can be evenly heated.

Optionally, the conductive layer 13 may be a magnetic resistance conductive layer, and the insulating cover 11 may be a ceramic cover with an open bottom.

Preferably, the conductive layer 13 is a magnetic resistance conductive layer so that the conductive layer 13 is as non-magnetic as possible. In this way, magnetic interference is not easily formed between the conductive layer 13 and the magnetically conductive layer 12 , thereby ensuring the effectiveness of heating the pot lid 100 .

In addition, the insulating cover 11 may be a ceramic cover with an open bottom. Thus, the insulating cover plate 11 can have better chemical and thermal stability.

According to some embodiments of the present invention, the conductive layer 13 may be in the shape of a curved strip and may cover the bottom wall of the insulating cover 11 . Thus, it is equivalent to extending the length of the conductive layer 13, which is beneficial to increase the uniformity of heating.

In some embodiments of the present invention, at least one of the conductive layer 13 and the magnetically permeable layer 12 comprises a plurality, each conductive layer 13 is connected in series with at least one magnetically permeable layer 12 to form a loop, and each magnetically permeable layer 12 All are connected in series with at least one conductive layer 13 to form a loop. Further improve the uniformity of heating.

Further, the conductive layer 13 can include multiple conductive layers 13, which can be connected in series with the magnetic permeable layer 12 to form a loop; Connect with the conductive layer 13 to form a loop; it can also be that the conductive layer 13 and the magnetic permeable layer 12 are multiple, the multiple conductive layers 13 are connected in parallel, the multiple magnetic permeable layers 12 are connected in parallel, and then the multiple conductive layers in parallel 13 and a plurality of parallel magnetic permeable layers 12 are connected in series to form a loop.

In addition, the magnetic permeable layer 12 may include a plurality of mutually independent ones, and the conductive layer 13 may comprise a plurality of mutually independent and one-to-one correspondence with the multiple magnetic permeable layers 12, and each conductive layer 13 is connected in series with the corresponding magnetic permeable layer 12 Form a loop. Thereby further improving the uniformity of heating.

Referring to FIGS. 1 and 2 , the total length of the conductive layer 13 is greater than the length of the magnetic permeable layer 12 extending in the circumferential direction. In this way, the heat receiving area of the insulating cover 11 can be increased, so that heat can be concentrated on the insulating cover 11 , thereby ensuring the uniformity of heating to a certain extent. The electric rice cooker according to the embodiment of the second aspect of the present invention includes: a cooker body, a cover body and an induction coil. There is an inner pot in the body of the pot. The cover body is movable between the positions of opening or closing the inner pot, the cover body may include a pot cover and a steam valve, and the pot cover may be the above-mentioned pot cover 100 . The induction coil may correspond to the magnetically conductive layer 12 on the pot cover 100, and the induction coil may be arranged away from the steam valve.

For example, the heating coil (or induction coil) can be sealed away from the steam valve end, which can reduce the influence of water vapor on the heating coil.

Of course, in other embodiments of the present invention, the induction heating coil can also be arranged at the end of the control panel far away from the pot cover 100, so that the influence of the induction heating coil on the control panel can be reduced.

Specifically, the pot cover 100 can be provided with an induced electromotive force area (that is, the area where the magnetically permeable layer 12 is located), and the magnetically permeable layer 12 can be opposite to the coil, thereby forming a high potential and a low potential, and the magnetically permeable layer 12 can be connected with the spiral The conductive layer 13 is connected to form an energized heating circuit, and by controlling the position of the spiral conductive layer 13, it can be heated even if there is no position opposite to the heating coil on the pot cover 100 . As long as the induction heating coil is opposite to the induced electromotive force area in the region where the magnetically conductive layer 12 is located, the coverage of the induction heating coil can be made very small, which is conducive to wiring and sealing on the pot cover 100 in a limited space, thereby realizing Pot cover 100 for even heating.

Optionally, the form of the induced electromotive force region of the magnetic permeable layer 12 may adopt the method shown in FIG. 1 or FIG. 2 . It should be noted that, for the method shown in FIG. 2 , it is necessary to open the gap relatively large (preferably beyond the center O, as shown by the dotted line in FIG. 2 ), otherwise the current will not pass through the conductive layer 13 directly in the magnetic conduction layer. The induced electromotive force region in which layer 12 flows.

Preferably, referring to Fig. 1, the conductive layer 13 is preferably not magnetically conductive, and a ring-shaped magnetically conductive layer 12 with a gap 123 can be provided near the center of the insulating cover plate 11, and the outer side of the magnetically conductive layer 12 is surrounded by evenly distributed The conductive layer 13, the two ends of the conductive layer 13 and the magnetic conduction layer 12 can be connected, and an induction coil can be provided on the pot cover 100 relative to the magnetic conduction layer 12 . Other parts may not be provided with induction coils, thus, a closed circuit can be formed on the pot cover 100, thereby expanding the heating area of the pot cover 100 to a certain extent.

It can be understood that the insulating cover 11 may be a ceramic cover. Of course, the insulating cover 11 can also be made of other materials such as aluminum or stainless steel. When the insulating cover plate 11 is made of materials such as aluminum or stainless steel, an insulating layer needs to be compounded on the outer surface of the insulating cover plate 11 . The magnetically permeable layer 12 can be made of magnetically permeable materials such as copper, aluminum, iron or stainless steel. The composite method of the magnetic permeable layer 12 can be various methods such as spraying, pasting or electroplating, as long as a stable and reliable magnetic permeable layer 12 can be finally formed on the outer surface of the insulating cover plate 11 .

It should be noted that the above embodiments of the present invention are described by taking the pot cover 100 suitable for electromagnetic heating as an example. Of course, the inner pot 100 of the present invention can also be used in other cooking utensils such as electric pressure cooker, induction cooker, etc., as long as the cooking utensils adopt the principle of electromagnetic heating, they all fall into the protection scope of the present invention.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", The orientation or positional relationship indicated by "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device or element Must be in a particular orientation, be constructed in a particular orientation, and operate in a particular orientation, and therefore should not be construed as limiting the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise specified limit. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the present invention, unless otherwise clearly specified and limited, the first feature may be in direct contact with the first feature or the first and second feature may be in direct contact with the second feature through an intermediary. touch. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

In the description of this specification, descriptions with reference to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, those skilled in the art can make the above-mentioned The embodiments are subject to changes, modifications, substitutions and variations.

Claims (18)

1. a kind of pot cover suitable for electromagnetic heating characterized by comprising

Insulation cover plate；

Magnetic layer, the magnetic layer are located on the insulation cover plate, and the magnetic layer is along the circumferentially extending of the insulation cover plate；

Conductive layer, the conductive layer are located on the insulation cover plate, and the conductive layer concatenates forming circuit with the magnetic layer；

The conductive layer includes the first conductive segment and the second conductive segment spaced apart from each other, and first conductive segment, described second are led Electric section and the magnetic layer are serially connected forming circuit.

2. the pot cover according to claim 1 suitable for electromagnetic heating, which is characterized in that one end of first conductive segment with One end of the magnetic layer is connected and extends round towards the direction far from the magnetic layer, one end of second conductive segment and The other end of the magnetic layer is connected and round towards the direction extension far from the magnetic layer, first conductive segment it is another End is connected with the other end of second conductive segment.

3. the pot cover according to claim 2 suitable for electromagnetic heating, which is characterized in that first conductive segment and described Two conductive segments are respectively positioned on the outside of the magnetic layer, and first conductive segment includes arranged for interval and being sequentially connected in series from inside to outside Multiple first arc conductive bars, second conductive segment include arranged for interval and multiple second arcs being sequentially connected in series from inside to outside Conductive bar is located at an innermost first arc conductive bar and is connected with the magnetic layer, and is located at innermost one second Arc conductive bar is connected with the magnetic layer, and the first arc conductive bar on the outermost side is led with the second arc on the outermost side Electric item is connected.

4. the pot cover according to claim 3 suitable for electromagnetic heating, which is characterized in that the first arc conductive bar, institute It states the second arc conductive bar and the magnetic layer is isocentric circular arc shape.

5. the pot cover according to claim 1 suitable for electromagnetic heating, which is characterized in that the conductive layer is located at the magnetic conduction The outside of layer, and the conductive layer includes spaced multiple helical rings, each helical ring is along the insulating cover The circumferential direction of plate extends spirally from inside to outside, multiple helical ring spirals in the same direction and nested setting, multiple helical ring series connection.

6. the pot cover according to claim 1 suitable for electromagnetic heating, which is characterized in that the magnetic layer is that tool is jaggy The both ends of annular, the conductive layer and the magnetic layer indentation, there are connected to form circuit.

7. the pot cover according to claim 6 suitable for electromagnetic heating, which is characterized in that the magnetic layer is jaggy in having Circular ring shape, and symmetrical axial symmetry of the conductive layer about the magnetic layer.

8. being suitable for the pot cover of electromagnetic heating described in any one of -7 according to claim 1, which is characterized in that the magnetic layer position In the middle part of the insulation cover plate, and the conductive layer is connected with the magnetic layer and is covered outward to the week of the insulation cover plate Edge.

9. the pot cover according to claim 8 suitable for electromagnetic heating, which is characterized in that the week edge of the insulation cover plate has Turn-up portion, and the conductive layer is covered to the neighbouring turn-up portion or the conductive layer and is covered to the turn-up portion.

10. being suitable for the pot cover of electromagnetic heating described in any one of -7 according to claim 1, which is characterized in that the magnetic layer Width be greater than the conductive layer width.

11. being suitable for the pot cover of electromagnetic heating described in any one of -7 according to claim 1, which is characterized in that the conductive layer To hinder magnetic conductance electric layer, the insulation cover plate is the ceramic cover plate of bottom-open.

12. being suitable for the pot cover of electromagnetic heating described in any one of -7 according to claim 1, which is characterized in that the conductive layer In bending bottom wall that is band-like and covering the insulation cover plate.

13. the pot cover according to claim 12 suitable for electromagnetic heating, which is characterized in that the conductive layer and the magnetic conduction For at least one of layer including multiple, each conductive layer concatenates forming circuit with magnetic layer described at least one, and every A magnetic layer concatenates forming circuit with conductive layer described at least one.

14. the pot cover according to claim 13 suitable for electromagnetic heating, which is characterized in that the conductive layer include it is multiple, Forming circuit is concatenated with the magnetic layer after multiple conductive layers are in parallel.

15. the pot cover according to claim 13 suitable for electromagnetic heating, which is characterized in that the magnetic layer include it is multiple, And forming circuit is connect with the conductive layer after multiple magnetic layer parallel connections.

16. the pot cover according to claim 13 suitable for electromagnetic heating, which is characterized in that the magnetic layer includes mutually solely Vertical is multiple, and the conductive layer includes mutually indepedent and, each conduction multiple correspondingly with multiple magnetic layers Layer is formed into a loop with the corresponding magnetic layer concatenation.

17. being suitable for the pot cover of electromagnetic heating described in any one of -7 according to claim 1, which is characterized in that the conductive layer Total length be greater than the length of the magnetic layer circumferentially.

18. a kind of electric cooker characterized by comprising

Cooker body, the cooker body is interior to have interior pot；

Lid, the lid move between the position for opening or closing the interior pot, and the lid includes pot cover and steam Valve, the pot cover are the pot cover according to any one of claim 1-17；

Induction coil, the induction coil is corresponding with the magnetic layer on the pot cover, and the induction coil is far from the steam Valve setting.