Electromagnetic heating device with cylindrical heating disc

Abstract

The utility model relates to an electromagnetic heating device with a cylinder type heating disc, which comprises an outer shell, an inner shell and the cylinder type heating disc, the inner shell is concentrically fixed inside the outer shell, the cylinder type heating disc is fixed between the inner shell and the outer shell, the cylinder type heating disc comprises a winding frame and a cylinder type induction coil, the outer wall of the winding frame is provided with a winding groove, and the cylinder type induction coil is arranged in the winding groove. A mounting hole is formed in the shaft part of the winding frame, the winding frame is arranged in the outer circumferential direction of the inner shell in a sleeving manner through the mounting hole, the inner shell is provided with a positioning groove with an opening in the upper end, the positioning groove is used for placing a metal cup, and the outer side wall of the metal cup and the cylindrical induction coil generate an electromagnetic induction phenomenon; therefore, the metal cup is heated. According to the utility model, the metal cup is placed through the positioning groove, so that the metal cup is positioned at the axis of the cylindrical induction coil, and the cylindrical induction coil is controlled by the circuit board to generate an alternating magnetic field, so that the metal cup is heated, the heating area of the metal cup is increased, and the heating efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to electromagnetic heating technical field, especially a kind of electromagnetic heating device with cylinder type heating disc. BACKGROUND

[0002] The milk frother is mainly used for making milk froth, and is suitable for making various milk froth drinks. The household milk frother needs to heat and stir milk to generate abundant milk froth. In addition to milk, the milk frother can also be used to make cappuccino, latte, hot chocolate and the like. The milk frother uses a disc-shaped induction coil to heat the bottom of a milk froth cup, and the liquid in the milk froth cup is heated through heat transfer. However, the diameter of the milk froth cup of the milk frother is relatively small, so the heating area of the cup bottom is relatively small, and the heating efficiency is relatively low. SUMMARY

[0003] To solve the problems in the prior art, the utility model provides an electromagnetic heating device with a cylinder type heating disc.

[0004] The utility model provides a kind of electromagnetic heating device with cylinder type heating disc, including shell, inner shell and cylinder type heating disc, the inner shell concentric fixed in shell interior, the cylinder type heating disc is fixed between inner shell and shell, the cylinder type heating disc includes bobbin, cylinder type induction coil, the bobbin outer wall is provided with winding groove, the winding groove is formed cylinder type induction coil by winding wire rod, the shaft portion of the bobbin is provided with mounting hole, the bobbin is set in the outer circumferential direction of inner shell by mounting hole, the inner shell is provided with the positioning slot of upper end opening, the positioning slot is used to place metal cup, the outside wall of the metal cup and cylinder type induction coil occurs electromagnetic induction phenomenon, to heat metal cup.

[0005] In some embodiments, the bobbin is cylindrical, the winding groove is disposed along the cylindrical surface, the bobbin is provided with a first limiting block and a second limiting block on both sides of the winding groove, and the cylinder type induction coil is limited between the first limiting block and the second limiting block.

[0006] In some embodiments, a plurality of magnetic strips are disposed at equal angles in the outer circumferential direction of the cylinder type induction coil, the magnetic strips are disposed parallel to the axial direction of the bobbin, the first limiting block and the second limiting block are provided with fixing grooves, and the first limiting block and the second limiting block fix the magnetic strips through the fixing grooves.

[0007] In some embodiments, the wire rod is an enameled wire, and the bobbin is provided with a wiring hole for routing the enameled wire.

[0008] In some embodiments, the utility model further includes a base, the base is provided with a circuit board, the circuit board is provided with a connecting hole, the lower end of the bobbin is provided with a plurality of supporting legs, and the lower end of the supporting leg is provided with a plug that matches the connecting hole.

[0009] In some embodiments, the inner shell comprises a first positioning cylinder and a second positioning cylinder, the bobbin is arranged outside the first positioning cylinder, the second positioning cylinder is connected with the outer shell, the diameter of the first positioning cylinder is smaller than that of the second positioning cylinder, the positioning groove is divided into a first positioning groove and a second positioning groove, the first positioning groove and the second positioning groove are arranged concentrically on the first positioning cylinder and the second positioning cylinder respectively.

[0010] In some embodiments, a smooth transition step surface is arranged between the first positioning cylinder and the second positioning cylinder, and the inner wall of the mounting hole is provided with a slope surface matched with the step surface.

[0011] In some embodiments, the metal cup comprises a cup body and a handle, the cup body comprises a first cup body and a second cup body, the diameter of the first cup body is smaller than that of the second cup body, the handle is fixed to the outer sidewall of the second cup body, when the metal cup is placed in the positioning groove of the inner shell, the first positioning cylinder and the second positioning cylinder position the first cup body and the second cup body respectively, the first cup body is located at the axis of the cylindrical induction coil, and the first cup body and the cylindrical induction coil generate electromagnetic induction phenomenon.

[0012] In some embodiments, the inner shell and the outer shell are provided with notches at positions corresponding to the handle, and when the metal cup is placed in the positioning groove of the inner shell, the handle is clamped at the notches.

[0013] In some embodiments, the inner shell is provided with a flange outward in the radial direction, the lower end surface of the flange is provided with a clamping groove, the outer shell is in a cylindrical shape, the upper end surface of the outer shell is clamped with the clamping groove, and the lower end surface of the outer shell is connected with the base.

[0014] Compared with the prior art, the electromagnetic heating device with the cylindrical heating disc has the following beneficial effects: the metal cup is placed in the positioning groove, so that the metal cup is located at the axis of the cylindrical induction coil; the cylindrical induction coil generates an alternating magnetic field through the control of the circuit board; eddy current is generated on the outer sidewall of the metal cup in the alternating magnetic field, so that the metal cup is heated; the magnetic field range of the cylindrical induction coil is large, so that a large range of metal cups can be heated; the heating area of the metal cup is increased, and the heating efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a schematic diagram of the three-dimensional structure of the electromagnetic heating device with the cylindrical heating disc according to the embodiments of the present application.

[0016] Figure 2 is one of the schematic diagrams of the exploded structure of the electromagnetic heating device with the cylindrical heating disc according to the embodiments of the present application.

[0017] Figure 3Figure 2 is a second exploded structural schematic view of the electromagnetic heating device with a cylindrical heating disc according to an embodiment of the present application.

[0018] Figure 4 Figure 3 is a three-dimensional structural schematic view of the inner shell and the bobbin according to an embodiment of the present application.

[0019] Reference signs: 1, outer shell; 11, notch;

[0020] 2, inner shell; 21, first positioning cylinder; 22, second positioning cylinder; 23, stepped surface; 24, positioning groove; 241, first positioning groove; 242, second positioning groove; 25, flange; 26, clamping groove;

[0021] 3, cylindrical heating disc;

[0022] 4, bobbin; 41, winding groove; 42, first limiting block; 43, second limiting block; 44, mounting hole; 45, slope surface; 46, fixing groove; 47, wiring hole; 48, supporting leg; 49, insertion leg;

[0023] 5, cylindrical induction coil; 51, magnetic strip;

[0024] 6, circuit board; 61, connecting hole;

[0025] 7, base; 71, heat dissipation hole;

[0026] 8, metal cup; 81, cup body; 811, first cup body; 812, second cup body; 82, handle. DETAILED DESCRIPTION

[0027] The specific implementation manners of the present application will be described with reference to the accompanying drawings.

[0028] Reference Figure 1 Figure 1 is a three-dimensional structural schematic view of the electromagnetic heating device with a cylindrical heating disc according to an embodiment of the present application. The entire device is in a cylindrical shape, and is used for electromagnetic heating of a cup container. The metal cup 8 includes a cup body 81 and a handle 82 made of metal. The cup body 81 is placed in the inner shell 2, and a high-frequency alternating magnetic field is generated by the cylindrical induction coil 5 between the inner shell 2 and the outer shell 1. An eddy current is generated on the outer sidewall of the cup body 81 in the alternating magnetic field, thereby heating the cup body 81.

[0029] Reference Figures 1 to 4The electromagnetic heating device with the cylinder heating disc comprises an outer shell 1, an inner shell 2 and a cylinder heating disc 3. The inner shell 2 is fixed concentrically inside the outer shell 1. The cylinder heating disc 3 is fixed between the inner shell 2 and the outer shell 1. The cylinder heating disc 3 comprises a bobbin 4 and a cylinder induction coil 5. The outer wall of the bobbin 4 is provided with a winding groove 41. The winding groove 41 forms the cylinder induction coil 5 by winding wires. The shaft part of the bobbin 4 is provided with a mounting hole 44. The bobbin 4 is sleeved on the outer circumferential direction of the inner shell 2 through the mounting hole 44. The inner shell 2 is provided with a positioning groove 24 with an open upper end. The positioning groove 24 is used for placing a metal cup 8. The outer side wall of the metal cup 8 generates an electromagnetic induction phenomenon with the cylinder induction coil 5 to heat the metal cup 8.

[0030] The electromagnetic heating device with the cylinder heating disc of the present application places the metal cup 8 in the positioning groove 24 so that the metal cup 8 is located at the axis of the cylinder induction coil 5. The cylinder induction coil 5 generates an alternating magnetic field through the control of the circuit board 6. The outer side wall of the metal cup 8 in the alternating magnetic field generates eddy current to heat the metal cup 8. The magnetic field range of the cylinder induction coil 5 is large, which can heat a large range of metal cups 8. The heating area of the metal cup 8 is increased, and the heating efficiency is improved. The cylinder induction coil 5 spreads along the axial direction, which can increase the contact area of the cylinder induction coil 5 and air, and is beneficial to heat dissipation.

[0031] In order to guide the winding of the wires into the cylinder induction coil 5, in the embodiment, the bobbin 4 is cylindrical, the winding groove 41 is arranged along the cylindrical surface, the bobbin 4 is provided with a first limiting block 42 and a second limiting block 43 on both sides of the winding groove 41, and the cylinder induction coil 5 is limited between the first limiting block 42 and the second limiting block 43. Figure 4 It can be understood that in this way, multiple layers of wires are needed to be wound on the bobbin to form the cylinder induction coil 5. The first limiting block 42 and the second limiting block 43 of the winding groove 41 can constrain the wires, thereby avoiding the cylinder induction coil 5 from being scattered, ensuring that the wires are arranged closely, and ensuring that the cylinder induction coil 5 has enough turns.

[0032] In order to improve the heating efficiency, in the embodiment, the cylinder induction coil 5 is provided with multiple magnetic strips 51 at equal angles in the outer circumferential direction, the magnetic strips 51 are arranged parallel to the axial direction of the bobbin 4, the first limiting block 42 and the second limiting block 43 are provided with fixing grooves 46, and the first limiting block 42 and the second limiting block 43 fix the magnetic strips 51 through the fixing grooves 46.

[0033] Figures 2 to 3 It can be understood that in this way, the cylinder induction coil 5 generates an alternating magnetic field, and the stable magnetic field of the magnetic strips 51 can be superimposed in the alternating magnetic field of the cylinder induction coil 5 to increase the magnetic field strength, thereby improving the heating efficiency.

[0034] It can be understood that in this way, the cylinder induction coil 5 generates an alternating magnetic field, and the stable magnetic field of the magnetic strips 51 can be superimposed in the alternating magnetic field of the cylinder induction coil 5 to increase the magnetic field strength, thereby improving the heating efficiency. ​

[0035] For the convenience of wiring, in the embodiment, reference Figure 3 , the wire is an enameled wire, and the bobbin 4 is provided with a wiring hole 47 for the enameled wire.

[0036] It can be understood that, in this way, the circuit board 6 of the control cylinder induction coil 5 is arranged at the base 7, the bobbin 4 is provided with the wiring hole 47 at the lower end, the wiring hole 47 is communicated with the winding groove 41, and the two ends of the wire extend to the direction of the circuit board 6 through the wiring hole 47, thereby facilitating the assembly of the terminal box.

[0037] For the convenience of assembly, in the embodiment, reference Figure 2 , the electromagnetic heating device with the cylinder heating disc further comprises a base 7, the base 7 is provided with a circuit board 6, the circuit board 6 is provided with a connecting hole 61, and the lower end of the bobbin 4 is provided with four supporting legs 48, and the lower end of the supporting leg 48 is provided with a plug 49 matched with the connecting hole 61.

[0038] It can be understood that, in this way, the bobbin 4 is fixed to the inner shell 2 by screws, the circuit board 6 is fixed to one side of the bobbin 4 by the four supporting legs 48, the plug 49 of the supporting leg 48 is matched with the connecting hole 61 of the circuit board 6, the circuit board 6 is fixed to the four supporting legs 48, the circuit board 6 and the cylinder induction coil 5 are separated by the four supporting legs 48, the alternating magnetic field of the cylinder induction coil 5 does not interfere with the work of the circuit board 6, the circuit board 6 can stably work by using a simple magnetic shielding structure or without using a magnetic shielding structure, and the cost is reduced.

[0039] In order to improve the compatibility of the positioning groove 24, in the embodiment, reference Figure 2 and Figure 3 , the inner shell 2 comprises a first positioning cylinder 21 and a second positioning cylinder 22, the bobbin 4 is arranged outside the first positioning cylinder 21, the second positioning cylinder 22 is connected with the outer shell 1, the diameter of the first positioning cylinder 21 is smaller than that of the second positioning cylinder 22, the positioning groove 24 is divided into a first positioning groove 241 and a second positioning groove 242, the first positioning groove 241 and the second positioning groove 242 are respectively located in the first positioning cylinder 21 and the second positioning cylinder 22, and the first positioning groove 241 and the second positioning groove 242 are concentrically arranged.

[0040] It can be understood that, in this way, the first positioning groove 241 is deeper in the positioning groove 24, and the second positioning groove 242 is closer to the opening, and the metal cup 8 with a large upper part and a small lower part can be placed in the first positioning groove 241 and the second positioning groove 242, the inner diameter of the first positioning groove 241 is larger than that of an ordinary mineral water bottle, and in addition to the metal cup 8 shown in the drawings, the first positioning groove 241 can also place a metal bottle with the same size as the ordinary mineral water bottle, such as a stainless steel thermos bottle with the same size of the upper part and the lower part, and these metal bottles can also be heated by the cylinder induction coil 5, thereby improving the compatibility of the positioning groove 24.

[0041] It should be further explained that the metal cup 8 of the embodiment is a milk frothing cup with a large upper part and a small lower part, so that the shape of the positioning groove 24 of the inner shell 2 is adapted accordingly. When the metal cup 8 with a large upper part and a small lower part is not needed, the positioning groove 24 of the inner shell 2 can be made to have the same size in the upper and lower parts, and only used to place the metal cup 8 with the same size in the upper and lower parts. The cylindrical induction coil 5 can be arranged in the outer circumferential direction of the inner shell 2, so that the alternating magnetic field generated by the cylindrical induction coil 5 can cover a larger area of the metal cup 8, further increasing the heating area of the metal cup 8.

[0042] In order to ensure that the bobbin 4 is tightly combined with the inner shell 2, in the embodiment, referring to Figure 2 and Figure 3 , a smooth transition step surface 23 is arranged between the first positioning cylinder 21 and the second positioning cylinder 22, and the inner wall of the mounting hole 44 is provided with a slope surface 45 matched with the step surface 23.

[0043] It can be understood that in this way, the step surface 23 between the first positioning cylinder 21 and the second positioning cylinder 22 will limit the assembly of the bobbin 4. By arranging the slope surface 45 on the inner wall of the mounting hole 44, the mounting hole 44 can wrap part of the step surface 23, so that the alternating magnetic field generated by the cylindrical induction coil 5 can cover a larger area of the metal cup 8.

[0044] In order to adapt the inner shell 2 to the metal cup 8, in the embodiment, referring to Figures 1 to 3 , the metal cup 8 includes a cup body 81 and a handle 82. The cup body 81 includes a first cup body 811 and a second cup body 812. The diameter of the first cup body 811 is smaller than that of the second cup body 812. The handle 82 is fixed to the outer side wall of the second cup body 812. When the metal cup 8 is placed in the positioning groove 24 of the inner shell 2, the first positioning cylinder 21 and the second positioning cylinder 22 position the first cup body 811 and the second cup body 812 respectively. The first cup body 811 is located at the axis of the cylindrical induction coil 5, and the first cup body 811 and the cylindrical induction coil 5 have electromagnetic induction phenomenon.

[0045] It can be understood that in this way, the cup body 81 of the metal cup 8 is large in the upper part and small in the lower part. Specifically, the first cup body 811 is smaller than the second cup body 812. The first cup body 811 has a small capacity and can be adapted to the cylindrical induction coil 5, so that the diameter of the cylindrical induction coil 5 can be smaller, improving the strength of the alternating magnetic field generated by the cylindrical induction coil 5. The second cup body 812 has a large capacity, which can improve the capacity of the metal cup 8. The cup cover of the metal cup 8 is also provided with a stirring rod (not shown in the figure). After the cup cover is covered on the metal cup 8, the stirring rod can extend into the first cup body 811 to stir the liquid in the first cup body 811 and the second cup body 812.

[0046] In order to ensure that the metal cup 8 can be positioned in the positioning groove 24, in the embodiment, the inner shell 2 and the outer shell 1 are provided with a notch 11 at the position corresponding to the handle 82, and the handle 82 is clamped at the notch 11 when the metal cup 8 is placed in the positioning groove 24 of the inner shell 2. Figure 1

[0047] It can be understood that, in this way, the surface of the cup body 81 of the metal cup 8 is smooth and is not conducive to positioning, and the handle 82 is matched with the notch 11, the shape of the notch 11 is matched with the handle 82, and when the metal cup 8 is placed in the positioning groove 24, the handle 82 is clamped in the notch 11, so that the metal cup 8 cannot rotate in the positioning groove 24 and can only be lifted out of the opening of the positioning groove 24, thereby ensuring that the metal cup 8 can be stably placed in the positioning groove 24 of the inner shell 2.

[0048] In order to tightly combine the inner shell 2 and the outer shell 1, in the embodiment, the inner shell 2 is provided with a flange 25 outward in the radial direction, the lower end surface of the flange 25 is provided with a clamping groove 26, the outer shell 1 is in a cylindrical shape, the upper end surface of the outer shell 1 is clamped with the clamping groove 26, and the lower end surface of the outer shell 1 is connected with the base 7. Figure 3 Figure 4 It can be understood that, in this way, the bottom of the base 7 is provided with a heat dissipation hole 71, which can help the heat dissipation of the cylindrical heating disc 3 and improve the heat dissipation efficiency, the inner shell 2 and the base 7 are both made of plastic, the outer shell 1 is made of metal, the upper end surface of the outer shell 1 is clamped with the inner shell 2 through the clamping groove 26, so that the outer shell 1 and the inner shell 2 are fixed, and the base 7 and the outer shell 1 are clamped through the same structure, so that the inner shell 2, the outer shell 1 and the base 7 can be tightly combined together.

[0049] It can be understood that, in this way, the bottom of the base 7 is provided with a heat dissipation hole 71, which can help the heat dissipation of the cylindrical heating disc 3 and improve the heat dissipation efficiency, the inner shell 2 and the base 7 are both made of plastic, the outer shell 1 is made of metal, the upper end surface of the outer shell 1 is clamped with the inner shell 2 through the clamping groove 26, so that the outer shell 1 and the inner shell 2 are fixed, and the base 7 and the outer shell 1 are clamped through the same structure, so that the inner shell 2, the outer shell 1 and the base 7 can be tightly combined together.

[0050] The embodiment places the metal cup 8 in the positioning groove 24, the metal cup 8 generates eddy current in the alternating magnetic field generated by the cylindrical induction coil 5, thereby heating the metal cup 8 and the liquid in the metal cup 8, the magnetic field range of the cylindrical induction coil 5 is large, the heating area of the metal cup 8 is increased, and the heating efficiency is improved, the cylindrical induction coil 5 is spread along the axial direction, the contact area of the cylindrical induction coil 5 and air can be increased, which is conducive to heat dissipation, the circuit board 6 is away from the cylindrical induction coil 5 through the support 48 of the bobbin 4, the interference of the alternating magnetic field of the cylindrical induction coil 5 on the circuit board 6 and electronic components is reduced, and it is ensured that the control circuit on the circuit board 6 can stably work.

[0051] The above is not intended to limit the technical scope of the utility model in any way, and any modification, equivalent change and modification made to the above embodiment according to the technical essence of the utility model still belong to the technical scope of the utility model.​​

Claims

1. An electromagnetic heating device having a cylindrical heating disc, characterized by, The utility model provides a heating device, including shell, inner shell and cylinder heating disc, the inner shell is fixed concentrically in the shell inside, the cylinder heating disc is fixed between the inner shell and the shell, the cylinder heating disc includes bobbin, cylinder induction coil, the outer wall of bobbin is provided with winding groove, the winding groove forms cylinder induction coil through winding wire, the shaft part of bobbin is provided with mounting hole, the bobbin is set in the outer circumferential direction of inner shell through mounting hole, the inner shell is provided with the positioning groove of upper end opening, the positioning groove is used for placing metal cup, the outside wall of metal cup and cylinder induction coil occur electromagnetic induction phenomenon to heat metal cup.

2. The electromagnetic heating apparatus having a cylindrical heat-generating disc according to claim 1, wherein The bobbin is cylindrical, the winding groove is arranged along the cylindrical surface, the bobbin is provided with a first limiting block and a second limiting block on both sides of the winding groove, and the cylinder induction coil is limited between the first limiting block and the second limiting block.

3. The electromagnetic heating apparatus having a cylindrical heat-generating disc according to claim 2, wherein A plurality of magnetic strips are arranged at equal angles in the outer circumferential direction of the cylinder induction coil, the magnetic strips are arranged parallel to the axial direction of the bobbin, the first limiting block and the second limiting block are provided with fixing grooves, and the first limiting block and the second limiting block fix the magnetic strips through the fixing grooves.

4. The electromagnetic heating apparatus having a cylindrical heat-generating disc according to claim 1, wherein The wire is an enameled wire, and the bobbin is provided with a wiring hole for the enameled wire.

5. The electromagnetic heating apparatus having a cylindrical heat-generating disc according to claim 1, wherein The utility model further comprises a base provided with a circuit board, the circuit board is provided with a connecting hole, the lower end of the bobbin is provided with a plurality of supporting legs, and the lower end of each supporting leg is provided with a plug pin matched with the connecting hole.

6. The electromagnetic heating apparatus having a cylindrical heat-generating disc according to claim 1, wherein The inner shell comprises a first positioning cylinder and a second positioning cylinder, the bobbin is arranged outside the first positioning cylinder, the second positioning cylinder is connected with the shell, the diameter of the first positioning cylinder is smaller than that of the second positioning cylinder, the positioning groove is divided into a first positioning groove and a second positioning groove, the first positioning groove and the second positioning groove are arranged in the first positioning cylinder and the second positioning cylinder respectively, and the first positioning groove and the second positioning groove are arranged concentrically.

7. The electromagnetic heating apparatus having a cartridge-type heat disc according to claim 6, wherein A smooth transition step surface is arranged between the first positioning cylinder and the second positioning cylinder, and the inner wall of the mounting hole is provided with a slope surface matched with the step surface.

8. The electromagnetic heating apparatus having a cylindrical heat-generating disc according to claim 6, wherein The metal cup comprises a cup body and a handle, the cup body comprises a first cup body and a second cup body, the diameter of the first cup body is smaller than that of the second cup body, the handle is fixed to the outer sidewall of the second cup body, when the metal cup is placed in the positioning groove of the inner shell, the first positioning cylinder and the second positioning cylinder position the first cup body and the second cup body respectively, the first cup body is located at the axis of the cylinder induction coil, and the first cup body and the cylinder induction coil occur electromagnetic induction phenomenon.

9. The electromagnetic heating apparatus having a cartridge-type heat disc according to claim 8, wherein The inner shell and the shell are provided with notches at positions corresponding to the handle, and when the metal cup is placed in the positioning groove of the inner shell, the handle is clamped in the notches.

10. The electromagnetic heating apparatus having a cylindrical heat-generating disc according to claim 1, wherein The inner shell is provided with a flange outward along the radial direction, the lower end surface of the flange is provided with a clamping groove, the shell is cylindrical, the upper end surface of the shell is clamped with the clamping groove, and the lower end surface of the shell is connected with the base.

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