Electromagnetic wire coil and induction cooker

Abstract

The utility model discloses an electromagnetic wire coil which comprises a wire coil frame, an electromagnetic induction coil arranged on the wire coil frame and a plurality of magnetic strips, the plurality of magnetic strips comprise a plurality of long magnetic strips distributed in a radial shape and a plurality of short magnetic strips distributed in a radial shape, and the long magnetic strips and the short magnetic strips are alternately arranged in the circumferential direction. The long magnetic strips extend to the outer edge of the wire coil frame from the center of the wire coil frame, the short magnetic strips are arranged far away from the center of the wire coil frame, the outer ends of the short magnetic strips extend to the outer edge of the wire coil frame, all the long magnetic strips are high-conductivity magnetic strips, and all the short magnetic strips are low-conductivity magnetic strips. The electromagnetic wire coil provided by the utility model not only can ensure the heating uniformity of cookware, but also can reduce the manufacturing cost of the magnetic strips. In addition, the utility model further discloses an induction cooker adopting the electromagnetic wire coil.

Description

TECHNICAL FIELD

[0001] The utility model relates to kitchen appliance technical field especially, relate to a kind of electromagnetic wire disc and electromagnetic oven. BACKGROUND

[0002] The electromagnetic oven in prior art includes shell and electromagnetic wire disc arranged in shell, and electromagnetic wire disc includes wire disc frame, electromagnetic induction coil arranged on wire disc frame and multiple magnetic strips with high magnetic permeability, multiple magnetic strips are distributed in radial on wire disc frame, and magnetic strip extends to the outer edge of disc frame from the central part of wire disc frame, by setting magnetic strip, coil magnetic field can be changed, the direction of magnetic force line generated by coil is guided, so that the magnetic force line generated by coil is concentrated on the bottom of pot, so that eddy current is generated on the bottom of pot, and the temperature of pot is increased.

[0003] Since the interval of adjacent two magnetic strips is small near the central position of wire disc frame, the corresponding magnetic force line density is large, and the interval of adjacent two magnetic strips is large away from the central position of wire disc frame, and the corresponding magnetic force line density is small, in order to make the magnetic force line density distribution of wire disc more uniform, fan-shaped magnetic strip is usually used in prior art, since the area of fan-shaped magnetic strip gradually increases away from the central position of wire disc frame, so that the interval of adjacent two magnetic strips away from the central position of wire disc frame can be avoided to be too large, so that the magnetic force line density away from the central position of wire disc frame can be made uniform, but such design will lead to excess quality of magnetic strip, and the manufacturing cost of magnetic strip is increased. In addition, long-short magnetic strip combination mode (for example, patent number CN205946232U) is also appeared to improve the above phenomenon, but the magnetic conductivity of long-short magnetic strip is consistent, so no matter how long-short magnetic strip is arranged, there is a region where long-short magnetic strip is very close or a region where long-short magnetic strip is far away, so that the magnetic force line is too concentrated in the region near long-short magnetic strip, and the magnetic field is concentrated in this part of region, and the problem of uniform magnetic field cannot be well solved. In the region far away, since the magnetic conductivity of long-short magnetic strip is consistent, the leaked magnetic force line will also increase with the increase of distance, and the magnetic field is not uniform. UTILITARY MODEL CONTENTS

[0004] The utility model solves the technical problem in prior art, and provides an electromagnetic wire disc and electromagnetic oven, which can ensure the uniformity of pot heating of electromagnetic wire disc and reduce the manufacturing cost of magnetic strip.

[0005] To solve the above technical problems, the utility model adopts the following technical solutions:

[0006] An electromagnetic wire reel comprises a wire reel frame, an electromagnetic induction coil arranged on the wire reel frame, and a plurality of magnetic strips, the plurality of magnetic strips comprising a plurality of long magnetic strips and a plurality of short magnetic strips arranged in a radial pattern, the long magnetic strips and the short magnetic strips being arranged alternately in a circumferential direction, the long magnetic strips extending from a center of the wire reel frame to an outer edge of the wire reel frame, the short magnetic strips being arranged away from the center of the wire reel frame, and outer ends of the short magnetic strips extending to the outer edge of the wire reel frame, all the long magnetic strips being high-permeability magnetic strips, and all the short magnetic strips being low-permeability magnetic strips.

[0007] In the electromagnetic wire reel, a width of the short magnetic strips is W, a distance between two adjacent long magnetic strips is W, a circle where W is located forms a first ring line, the short magnetic strips are arranged outside the first ring line, and inner ends of the short magnetic strips are arranged close to the first ring line.

[0008] In the electromagnetic wire reel, a length of the long magnetic strips is L, a length of the short magnetic strips is L1, and 0.5≤L1 / L≤0.7 is satisfied.

[0009] In the electromagnetic wire reel, the inner ends of the long magnetic strips are provided with plug-in portions extending in an axial direction of the wire reel frame, the wire reel frame is provided with plug-in holes, and the plug-in portions are inserted into the plug-in holes.

[0010] In the electromagnetic wire reel, the number of the long magnetic strips and the number of the short magnetic strips are both odd numbers, the plurality of long magnetic strips are arranged uniformly in the circumferential direction, and the plurality of short magnetic strips are arranged uniformly in the circumferential direction.

[0011] In the electromagnetic wire reel, an initial permeability of the high-permeability magnetic strips is not less than 1750 H / m, and an initial permeability of the low-permeability magnetic strips is not less than 380 H / m.

[0012] In the electromagnetic wire reel, one side of the wire reel frame is provided with wire grooves arranged in a radial pattern, the other side of the wire reel frame is provided with a plurality of mounting grooves, the plurality of mounting grooves comprise a plurality of long mounting grooves and a plurality of short mounting grooves, the electromagnetic induction coil is wound in the wire grooves, the long magnetic strips are arranged in the long mounting grooves, and the short magnetic strips are arranged in the short mounting grooves.

[0013] In the electromagnetic wire reel, the wire reel frame comprises a plurality of long plates arranged in a radial pattern and a plurality of short plates arranged in a radial pattern, inner ends of the plurality of long plates are connected, inner ends of the short plates are connected to two adjacent long plates, the long mounting grooves are arranged on one side of the long plates, the short mounting grooves are arranged on one side of the short plates, the other sides of the long plates and the short plates are provided with a plurality of partition ribs arranged in a radial pattern, and the wire grooves are formed between two adjacent partition ribs.

[0014] In the electromagnetic wire reel, a side wall of the mounting grooves is provided with a heat-pressed rib, and the heat-pressed rib extends to the inside of the mounting grooves after being heat-pressed and abuts against the magnetic strips.

[0015] The utility model discloses still a kind of electromagnetic oven, including shell, the shell inside is equipped with the electromagnetic wire disc of any above-mentioned technical scheme.

[0016] The utility model has the advantages of:

[0017] 1、The magnetic permeability of the magnetic stripe is the resistance of the magnetic stripe to generate magnetic flux after the coil in space or in the magnetic core space flows current, or the ability of the magnetic stripe to conduct magnetic force lines in a magnetic field. The greater the magnetic permeability of the magnetic stripe, the greater its ability to conduct magnetic force lines. The magnetic permeability of the high-permeability magnetic stripe is greater than that of the low-permeability magnetic stripe. Therefore, in the present application, all long magnetic stripes that are radially distributed and extend from the center of the coil holder to the outer edge of the holder are set as high-permeability magnetic stripes, and a short magnetic stripe is arranged between two adjacent long magnetic stripes, with the short magnetic stripe being a low-permeability magnetic stripe. As a result, due to the inconsistent magnetic properties of long and short magnetic stripes, in the area where the long magnetic stripes are close to each other, the short magnetic stripe will guide the magnetic force lines around the outer periphery of the coil holder to the adjacent area of the long and short magnetic stripes, and the magnetic force lines will preferentially enter the long magnetic stripe, thereby forming a magnetic force line path from the center to the outer periphery of the coil holder. At this time, the magnetic force lines in the close area will not be too concentrated, thereby achieving the effect of uniform heating. In addition, the low-permeability magnetic stripe has lower manufacturing cost. That is, in the present application, by alternating the distribution of long and short magnetic stripes and setting the long magnetic stripe as a high-permeability magnetic stripe and the short magnetic stripe as a low-permeability magnetic stripe, the manufacturing cost of the magnetic stripe can be reduced while ensuring the uniformity of the electromagnetic wire coil in heating the pot.

[0018] 2、The width of the short magnetic stripe is W, and the distance between the two adjacent long magnetic stripes is W. The first ring line is formed by the circle where W is located, and the short magnetic stripe is located outside the first ring line with its inner end close to the first ring line. This design can maximize the length of the short magnetic stripe in the limited space between the two long magnetic stripes, thereby enhancing the guiding effect of the short magnetic stripe on the magnetic force lines around the outer periphery of the coil holder, and making the magnetic force line density more uniform in the radial direction.

[0019] 3、The length of the long magnetic stripe is L, and the length of the short magnetic stripe is L1, satisfying 0.5≤L1 / L≤0.7. This design can avoid the short magnetic stripe being too short to significantly enhance the magnetic force line density in the area located at half the radius of the coil holder, and can also avoid the short magnetic stripe being too long to cause high material cost and being too close to the center of the coil holder, which would further increase the magnetic force line density near the center of the coil holder and cause a large difference between the magnetic force line density near the center and that far from the center, resulting in uneven magnetic force line density.

[0020] 4. The inner end of the long magnetic strip is provided with a plug-in part extending along the axial direction of the wire reel frame. The wire reel frame is provided with a plug-in hole, and the plug-in part is inserted into the plug-in hole. This design can not only achieve pre-positioning of the long magnetic strip through the cooperation of the plug-in part and the plug-in hole to facilitate subsequent assembly, but also guide the magnetic lines of force to the cookware through the plug-in part, reduce magnetic leakage, and improve the magnetic concentration effect of the long magnetic strip.

[0021] 5. The number of both long and short magnetic strips is odd, with the long magnetic strips and short magnetic strips evenly distributed circumferentially. This design ensures that the two magnetic strips facing each other on the same diameter of the coil frame are respectively long and short magnetic strips, further guaranteeing the uniformity of the magnetic field lines distribution.

[0022] 6. One side of the coil frame has radially distributed winding grooves, and the other side has multiple mounting grooves, including multiple long mounting grooves and multiple short mounting grooves. The electromagnetic induction coil is wound in the winding grooves, the long magnetic strip is placed in the long mounting grooves, and the short magnetic strip is placed in the short mounting grooves. This design allows for easy independent assembly and disassembly of the electromagnetic induction coil, the long magnetic strip, and the short magnetic strip, reducing the difficulty of disassembly, assembly, and maintenance.

[0023] 7. The coil frame comprises multiple radially distributed long plates and multiple radially distributed short plates. The inner ends of the long plates are connected, and the inner ends of the short plates are connected to two adjacent long plates. Long mounting slots are located on one side of the long plates, and short mounting slots are located on one side of the short plates. Multiple radially distributed ribs are provided on the other side of the long and short plates, forming winding grooves between adjacent ribs. This design allows for the formation of heat dissipation holes in the area between two adjacent long plates and inside the short plates, as well as in the area between the long and short plates. This increases the area of ​​the heat dissipation holes, thereby improving the heat dissipation speed of the electromagnetic coil and preventing heat radiation from the electromagnetic coil to other electronic components inside the housing, which could damage the electronic components.

[0024] 8. The side wall of the mounting groove is provided with heat-pressing ribs. After heat pressing, the heat-pressing ribs extend towards the inside of the mounting groove and abut against the magnetic strip. If the magnetic strip is glued to the mounting groove with adhesive, this method is not only inefficient and costly, but also causes the adhesive to melt during the high-temperature process, resulting in weak adhesion and detachment of the magnetic strip. This technical solution, by setting heat-pressing ribs and extending them towards the inside of the mounting groove to abut against the magnetic strip after heat pressing, fixes the magnetic strip in the mounting groove, preventing it from falling off and thus improving the installation reliability of the magnetic strip.

[0025] 9. An induction cooker, comprising a housing, wherein an electromagnetic coil as described in any of the above-mentioned technical solutions is disposed inside the housing. The electromagnetic coil of this invention not only reduces the manufacturing cost of the induction cooker but also enables the induction cooker to achieve uniform heating of cookware.

[0026] The features and advantages of the present application will be described in detail in the following specific embodiments and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0027] The present application will be further described in conjunction with the following drawings:

[0028] Figure 1 Structure diagram of the electromagnetic wire disc in the first embodiment of the present application;

[0029] Figure 2 Bottom view of the electromagnetic wire disc in the first embodiment of the present application;

[0030] Figure 3 Top view of the electromagnetic wire disc in the first embodiment of the present application;

[0031] Figure 4 Explosive diagram of the electromagnetic oven in the second embodiment of the present application.

[0032] Reference signs:

[0033] 100, electromagnetic wire disc; 110, wire disc holder; 111, plug-in hole; 112, winding groove; 113, long mounting groove; 114, short mounting groove; 115, long plate; 116, short plate; 117, annular frame; 118, partition rib; 119, heat dissipation hole; 1101, hot-pressing rib; 120, electromagnetic induction coil; 130, long magnetic strip; 131, plug-in part; 140, short magnetic strip; 150, first ring line; 200, base; 300, upper cover; 400, panel.

DETAILED DESCRIPTION

[0034] The present application provides an electromagnetic wire disc, comprising a wire disc holder, an electromagnetic induction coil and a plurality of magnetic strips arranged on the wire disc holder, wherein the plurality of magnetic strips comprises a plurality of long magnetic strips and a plurality of short magnetic strips arranged in a radial manner, the long magnetic strips and the short magnetic strips are arranged alternately in a circumferential direction, the long magnetic strips extend from the center of the wire disc holder to the outer edge of the wire disc holder, the short magnetic strips are arranged away from the center of the wire disc holder, and the outer end of the short magnetic strips extends to the outer edge of the wire disc holder, all the long magnetic strips are high-permeability magnetic strips, and all the short magnetic strips are low-permeability magnetic strips.

[0035] The magnetic permeability of the magnetic stripe specifically refers to the resistance of the magnetic stripe to generate magnetic flux after the coil in the space or in the magnetic core space flows with current, or the ability of the magnetic stripe to conduct magnetic force lines in the magnetic field. The greater the magnetic permeability of the magnetic stripe, the greater the ability of the magnetic stripe to conduct magnetic force lines, and the magnetic permeability of the high-permeability magnetic stripe is greater than that of the low-permeability magnetic stripe. Therefore, in the scheme, all the long magnetic stripes that are distributed in a radial manner and extend from the center of the coil holder to the outer edge of the coil holder are set as high-permeability magnetic stripes, and a short magnetic stripe is arranged between two adjacent long magnetic stripes, and the short magnetic stripe is a low-permeability magnetic stripe. In this way, since the magnetic conductive properties of the long and short magnetic stripes are inconsistent, in the area where the long magnetic stripes are relatively close, the short magnetic stripe will conduct the magnetic force lines at the outer periphery of the coil holder to the adjacent area of the long and short magnetic stripes, and then the magnetic force lines will preferentially enter the long magnetic stripe, thereby forming a magnetic force line path from the center of the coil holder to the outer periphery. At this time, the magnetic force lines in the close area will not be too concentrated, thereby achieving the effect of uniform heating. In addition, in the outer periphery of the coil holder where the long and short magnetic stripes are far apart, the long magnetic stripe has better magnetic conductive properties and can also prevent the leakage of magnetic force lines. In addition, the low-permeability magnetic stripe has lower manufacturing cost. That is, in the utility model, by alternately distributing the long and short magnetic stripes and setting the long magnetic stripe as a high-permeability magnetic stripe and the short magnetic stripe as a low-permeability magnetic stripe, the manufacturing cost of the magnetic stripe can be reduced while the uniformity of the electromagnetic coil in heating the pot is ensured.

[0036] The technical solutions of the embodiments of the utility model will be explained and described below in combination with the drawings of the embodiments of the utility model. However, the following embodiments are only preferred embodiments of the utility model, not all. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model. In addition, it should be understood that the words indicating the orientation or position relationship such as "up", "down", "left", "right", "vertical", "horizontal", "inner", "outer", "vertical", "horizontal", "top", "bottom" and the like are only based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device / element must have a particular orientation or be constructed and operated in a particular orientation, so it cannot be understood as a limitation on the utility model.

[0037] Embodiment one

[0038] As Figures 1 to 3As shown, the electromagnetic wire disc 100 in the embodiment includes a wire disc holder 110, an electromagnetic induction coil 120 arranged on the wire disc holder 110, and a plurality of magnetic strips, which include a plurality of long magnetic strips 130 distributed in a radial manner and a plurality of short magnetic strips 140 distributed in a radial manner. The long magnetic strips 130 and the short magnetic strips 140 are arranged in a circumferential direction alternately, that is, there is only one short magnetic strip 140 between two adjacent long magnetic strips 130. The long magnetic strips 130 extend from the center of the wire disc holder to the outer edge of the wire disc holder, and the short magnetic strips 140 are arranged away from the center of the wire disc holder, and the outer ends of the short magnetic strips 140 extend to the outer edge of the wire disc holder. The long magnetic strips 130 are all high-permeability magnetic strips, and all the short magnetic strips 140 are low-permeability magnetic strips.

[0039] The permeability of the magnetic strip refers to the resistance of the magnetic strip to generate magnetic flux after the coil in the space or in the magnetic core space flows through the current, or the ability of the magnetic strip to conduct magnetic force lines in the magnetic field. The greater the permeability of the magnetic strip, the greater the ability to conduct magnetic force lines, and the permeability of the high-permeability magnetic strip is greater than that of the low-permeability magnetic strip. Therefore, in the present scheme, all the long magnetic strips 130 distributed in a radial manner and extending from the center of the wire disc holder to the outer edge of the wire disc holder are arranged as high-permeability magnetic strips with high permeability, and a short magnetic strip 140 is arranged between two adjacent long magnetic strips 130, and the short magnetic strip 140 is a low-permeability magnetic strip. In this way, due to the inconsistent magnetic properties of the long and short magnetic strips, in the area where the long magnetic strips 130 are relatively close, the short magnetic strips 140 will conduct the magnetic force lines on the outer periphery of the wire disc holder 110 to the adjacent area of the long and short magnetic strips, and the magnetic force lines will preferentially enter the long magnetic strips 130, thereby forming a magnetic force line path from the center of the wire disc holder to the outer periphery. At this time, the magnetic force lines in the close area will not be too concentrated, thereby achieving the effect of uniform heating. In addition, in the outer periphery of the wire disc holder where the long and short magnetic strips are far apart, the long magnetic strips 130 have better magnetic properties and can also prevent the leakage of magnetic force lines. In addition, the low-permeability magnetic strip has lower manufacturing cost. That is, in the present embodiment, by alternately arranging the long and short magnetic strips and arranging the long magnetic strips 130 as high-permeability magnetic strips and the short magnetic strips 140 as low-permeability magnetic strips, the manufacturing cost of the magnetic strips can be reduced while the uniformity of the electromagnetic wire disc 100 in heating the pot is ensured.

[0040] Specifically, the material of the high-permeability magnetic strip in the present embodiment is Dongci DMR40 or high-permeability material manganese zinc ferrite (PC40), which has an initial permeability not less than 1750 H / m and a Curie temperature not less than 215 degrees Celsius. The material of the low-permeability magnetic strip is Dongci R500M, which has an initial permeability not less than 380 H / m and a Curie temperature not less than 200 degrees Celsius.

[0041] As shown in FIG. 2, the electromagnetic wire disc 100 is arranged on the bottom of the pot 200, and the electromagnetic induction coil 120 is arranged on the wire disc holder 110. The electromagnetic induction coil 120 is connected to the power supply 300 through the wire 310, and the power supply 300 is connected to the power grid 400. Figure 2As shown, the width of the short magnetic strip 140 is W, and the spacing between the two adjacent long magnetic strips 130 is W. The short magnetic strip 140 is located outside the first ring line 150 formed by the circle at W, and the inner end of the short magnetic strip 140 is arranged close to the first ring line 150. In this way, the length of the short magnetic strip 140 can be as long as possible in the limited space between the two long magnetic strips 130, so as to enhance the guiding effect of the short magnetic strip 140 on the magnetic field lines on the outer periphery of the reel holder 110, and make the magnetic field line density more uniform in the radial direction.

[0042] In the embodiment, the length of the long magnetic strip 130 is L, and the length of the short magnetic strip 140 is L1, which satisfies 0.5≤L1 / L≤0.7. When L1 / L is less than 0.5, the length of the short magnetic strip 140 is too short and too far away from the center of the reel holder, which will result in that the short magnetic strip 140 has no obvious effect on the enhancement of the magnetic field line density in the area at half the radius of the reel holder. When L1 / L is greater than 0.7, not only the length of the short magnetic strip 140 is too long to increase the material cost, but also the inner end of the short magnetic strip 140 is too close to the center of the reel holder, which will further increase the magnetic field line density near the center of the reel holder, and make the difference between the magnetic field line density near the center of the reel holder and the magnetic field line density far away from the center of the reel holder too large, resulting in uneven magnetic field line density. Therefore, in the embodiment, L1 / L is preferably 0.6. In this way, it can not only avoid that the short magnetic strip 140 is too short to have no obvious effect on the enhancement of the magnetic field line density in the area at half the radius of the reel holder, but also avoid that the short magnetic strip 140 is too long to increase the material cost and too close to the center of the reel holder, thereby ensuring that the magnetic field line density near the center of the reel holder is basically equal to the magnetic field line density far away from the center of the reel holder. Of course, optionally, L1 / L can also be but not limited to 0.5, 0.55, 0.65, 0.7, etc.

[0043] In order to improve the magnetic aggregation effect of the long magnetic strip 130, in the embodiment, the inner end of the long magnetic strip 130 is provided with a plug-in part 131 extending along the axial direction of the reel holder, that is, the long magnetic strip 130 is L-shaped, and the reel holder 110 is provided with a plug-in hole 111 arranged close to the center of the reel holder. The plug-in part 131 is inserted into the plug-in hole 111. In this way, the predetermined position of the long magnetic strip 130 can be realized through the cooperation of the plug-in part 131 and the plug-in hole 111, so as to facilitate subsequent assembly, and the magnetic field lines can be further guided to the pot through the plug-in part 131, thereby reducing the magnetic leakage and improving the magnetic aggregation effect of the long magnetic strip 130.

[0044] Preferably, the number of long magnetic strips 130 and short magnetic strips 140 is odd, and the plurality of long magnetic strips 130 and the plurality of short magnetic strips 140 are uniformly distributed in the circumferential direction. In this way, the two magnetic strips arranged opposite on the same diameter of the reel holder 110 can be the long magnetic strip 130 and the short magnetic strip 140, respectively, so as to further ensure the uniformity of the distribution of the magnetic field lines.

[0045] In addition, one side of the wire reel frame 110 in the embodiment is provided with winding grooves 112 distributed in a radial manner, and the other side is provided with a plurality of mounting grooves, including a plurality of long mounting grooves 113 and a plurality of short mounting grooves 114. The electromagnetic induction coil 120 is wound in the winding groove 112, the long magnetic strip 130 is arranged in the long mounting groove 113, and the short magnetic strip 140 is arranged in the short mounting groove 114. Arranging the electromagnetic induction coil 120 and the magnetic strip on the two sides of the wire reel frame 110 can facilitate the independent disassembly of the electromagnetic induction coil 120, the long magnetic strip 130, and the short magnetic strip 140, thereby reducing the disassembly and maintenance difficulty of the three.

[0046] In order to improve the heat dissipation speed of the electromagnetic wire reel 100, the wire reel frame 110 in the embodiment includes a plurality of long plates 115 distributed in a radial manner, a plurality of short plates 116 distributed in a radial manner, and a ring-shaped frame 117. The inner ends of the plurality of long plates 115 are connected by integral molding, the inner ends of the short plates 116 are connected with the adjacent two long plates 115 by integral molding, and the ring-shaped frame 117 is wrapped outside the long plates 115 and the short plates 116 and is connected with the outer ends of the long plates 115 and the outer ends of the short plates 116 by integral molding. The long mounting grooves 113 are arranged on one side of the long plates 115, the short mounting grooves 114 are arranged on one side of the short plates 116, the long mounting grooves 113 and the short mounting grooves 114 are located on the same side of the wire reel frame 110, and the other side of the long plates 115 and the short plates 116 is provided with a plurality of radial distribution of the partition ribs 118, and the winding grooves 112 are formed between the adjacent two partition ribs 118. In this way, the area between the adjacent two long plates 115 and inside the short plates 116 forms the heat dissipation holes 119, and the area between the long plates 115 and the short plates 116 forms the heat dissipation holes 119, that is, the area of the heat dissipation holes 119 is increased to improve the heat dissipation speed of the electromagnetic wire reel 100, and to avoid the heat radiation of the electromagnetic wire reel 100 to other electronic devices in the shell, thereby causing damage to the electronic devices.

[0047] In the embodiment, the two long side walls of the mounting groove are respectively provided with heat pressing ribs 1101 extending along the axial direction of the wire reel frame. After heat pressing, the heat pressing ribs 1101 extend towards the inside of the mounting groove and abut against the magnetic strip. If the magnetic strip is adhered and arranged in the mounting groove in the form of adhesive bonding, this way not only has low winding efficiency and high cost, but also the adhesive melts during high temperature, which causes the magnetic strip to be not firmly bonded and further causes the magnetic strip to fall off. In the technical solution, the heat pressing ribs 1101 are arranged and extend towards the inside of the mounting groove and abut against the magnetic strip after heat pressing, so that the magnetic strip is fixed in the mounting groove and the magnetic strip will not fall off, thereby improving the installation reliability of the magnetic strip.

[0048] It can be understood that in other embodiments of the present application, the number of long magnetic strips and short magnetic strips is even, and the plurality of long magnetic strips is evenly distributed in the circumferential direction, and the plurality of short magnetic strips is evenly distributed in the circumferential direction. Such design can make the two magnetic strips on the same diameter of the reel holder be long magnetic strips or short magnetic strips, and such design can further ensure the uniformity of the magnetic field distribution.

[0049] It can be understood that in other embodiments of the present application, the electromagnetic induction coil is adhesively fixed in the winding groove, and the magnetic strip is adhesively fixed in the mounting groove.

[0050] It can be understood that in other embodiments of the present application, the electromagnetic induction coil and the magnetic strip are located on the same side of the reel holder, and at this time the magnetic strip is installed on the side of the electromagnetic induction coil away from the reel holder.

[0051] Embodiment two

[0052] As shown in Figure 4 The present embodiment also provides an electromagnetic oven, which comprises a shell, a fan, a display panel, a main control panel and the electromagnetic reel 100 of any one of the above technical solutions are arranged in the shell, wherein the shell comprises a base 200, an upper cover 300 and a panel 400, the panel 400 is adhesively fixed on the upper cover 300, the upper cover 300 is fixed with the base 200 through screws, and the electromagnetic reel 100, the fan, the display panel and the main control panel are all fixed on the base 200 through screws, the magnetic strip is located on the side of the reel holder 110 facing the base 200, and the electromagnetic induction coil 120 is located on the side of the reel holder 110 facing the panel 400. Such design not only can reduce the manufacturing cost of the electromagnetic oven, but also can make the electromagnetic oven realize uniform heating of the pot.

[0053] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Those skilled in the art should understand that the present application includes but is not limited to the contents described in the above specific embodiments and the drawings. Any modification without deviating from the functional and structural principles of the present application shall be included in the scope of the claims.

Claims

1. An electromagnetic wire reel comprising a wire reel frame, an electromagnetic induction coil provided on the wire reel frame, and a plurality of magnetic strips, characterized in that, The plurality of magnetic strips comprises a plurality of long magnetic strips and a plurality of short magnetic strips, the long magnetic strips and the short magnetic strips are arranged alternately in a radial manner, the long magnetic strips extend from the center of the reel to the outer edge of the reel, the short magnetic strips are arranged away from the center of the reel, and the outer ends of the short magnetic strips extend to the outer edge of the reel, all the long magnetic strips are high permeability magnetic strips, and all the short magnetic strips are low permeability magnetic strips.

2. An electromagnetic wire coil as claimed in claim 1, characterized in that The width of the short magnetic strip is W, the distance between two adjacent long magnetic strips is W, the first ring line is formed by the circle where W is located, the short magnetic strip is located outside the first ring line, and the inner end of the short magnetic strip is arranged close to the first ring line.

3. An electromagnetic wire coil as defined in claim 1, wherein The length of the long magnetic strip is L, the length of the short magnetic strip is L1, and 0.5≤L1 / L≤0.7 is satisfied.

4. An electromagnetic wire coil as defined in claim 1, wherein The inner end of the long magnetic strip is provided with a plug-in part extending in the axial direction of the reel, and the reel is provided with a plug-in hole, and the plug-in part is inserted into the plug-in hole.

5. An electromagnetic wire coil as defined in claim 1, wherein The number of the long magnetic strips and the short magnetic strips is odd, the plurality of long magnetic strips are evenly distributed in the circumferential direction, and the plurality of short magnetic strips are evenly distributed in the circumferential direction.

6. An electromagnetic wire coil as defined in claim 1, wherein The initial magnetic permeability of the high permeability magnetic strip is not less than 1750H / m, and the initial magnetic permeability of the low permeability magnetic strip is not less than 380H / m.

7. A coil former according to any one of claims 1 to 6, wherein One side of the reel is provided with a plurality of winding grooves arranged in a radial manner, and the other side is provided with a plurality of mounting grooves, the plurality of mounting grooves comprises a plurality of long mounting grooves and a plurality of short mounting grooves, the electromagnetic induction coil is wound in the winding groove, the long magnetic strip is arranged in the long mounting groove, and the short magnetic strip is arranged in the short mounting groove.

8. An electromagnetic wire coil as defined in claim 7, wherein, The reel comprises a plurality of long plates and a plurality of short plates arranged in a radial manner, the inner ends of the plurality of long plates are connected, the inner ends of the short plates are connected with two adjacent long plates, the long mounting grooves are arranged on one side of the long plate, the short mounting grooves are arranged on one side of the short plate, the other side of the long plate and the short plate is provided with a plurality of radial distribution of the spacer rib, and the winding groove is formed between two adjacent spacer ribs.

9. An electromagnetic wire coil as defined in claim 7, wherein, The side wall of the mounting groove is provided with a hot pressing rib, and the hot pressing rib extends to the inner side of the mounting groove after hot pressing and abuts against the magnetic strip.

10. An electromagnetic cooker comprising a housing, characterized in that, The inside of the shell is provided with the electromagnetic reel of any one of claims 1 to 9.

Images