Electromagnetic heating bin assembly, electromagnetic heating device and vending machine

Abstract

The utility model discloses an electromagnetic heating bin assembly, an electromagnetic heating device and a vending machine, and the electromagnetic heating bin assembly comprises a bin body which is provided with a heating cavity for placing a meal box; the wire spool is installed on the side face of the bin body, the side face of the bin body is covered with the inner wall of the wire spool, and a wire groove used for arranging a wire is formed in the outer wall of the wire spool so that the meal box placed in the bin body can be heated; wherein the wire spool is provided with a first area, a plurality of first-type wire grooves are formed in the first area, the first-type wire grooves comprise straight wire grooves and arc-shaped wire grooves communicated with the straight wire grooves, the straight wire grooves extend linearly in the first direction and are distributed at intervals in the second direction, and the arc-shaped wire grooves extend in an arc shape in the second direction; the arc-shaped wire ducts are distributed at intervals along a first direction, so that the wires arranged in the first wire ducts are arranged in a shape of a plurality of runways distributed at intervals from inside to outside; the first direction is substantially perpendicular to the second direction.

Description

Technical Field

[0001] This utility model relates to the technical field of electromagnetic heating, and in particular to an electromagnetic heating chamber assembly, an electromagnetic heating device, and a vending machine. Background Technology

[0002] Electromagnetic heating, also known as electromagnetic induction heating, is a technology that works by generating an alternating magnetic field through electronic circuitry. When an iron-containing container is placed on top of this field, the surface of the container cuts the alternating magnetic field lines, generating an alternating current (eddy current) in the metal part at the bottom of the container. This eddy current causes charge carriers at the bottom of the container to move at high speed and randomly. The collisions and friction between these charge carriers and atoms generate heat, thus heating the object. Electromagnetic heating fundamentally improves upon the low thermal efficiency of resistive heating methods such as heating elements and heating coils that rely on heat conduction.

[0003] Currently, in order to improve the uniformity of electromagnetic heating, the technique of changing the magnetic field distribution is usually adopted, such as setting up multiple coil components to heat separately, thereby changing the heating effect. However, this has not improved the uniformity, and there is often a problem that the uneven heating causes local scorching. Utility Model Content

[0004] The purpose of this invention is to provide an electromagnetic heating chamber assembly, an electromagnetic heating device, and a vending machine.

[0005] The first aspect of this utility model provides an electromagnetic heating chamber assembly, comprising: a chamber body having a heating cavity for placing a lunchbox; a winding reel installed on the side of the chamber body, the inner wall of the winding reel covering the side of the chamber body, and the outer wall of the winding reel having grooves for placing wires to heat the lunchbox placed inside the chamber body; wherein, the winding reel has a first region, the first region having a plurality of first-type grooves, the first-type grooves including straight grooves and arc-shaped grooves communicating with the straight grooves, the straight grooves being arranged to extend in a straight line along a first direction and being spaced apart along a second direction, the arc-shaped grooves being arranged to extend in an arc along the second direction and being spaced apart along the first direction, so that the wires arranged in the first-type grooves present a plurality of racetrack-shaped arrangements spaced apart from the inside out; the first direction and the second direction are approximately perpendicular.

[0006] Furthermore, the winding spool also has a second region located within the first region; the second region is provided with a plurality of second-type wire grooves, which are arranged in coaxial rings spaced apart from the inside out, so that the wires arranged in the second-type wire grooves present multiple rings; wherein,

[0007] The second type of wire groove is connected to the first type of wire groove, so that the wire is wound through the second type of wire groove in sequence before entering the first type of wire groove for winding.

[0008] Furthermore, the connection between the arc-shaped groove and the straight groove is set as a circular arc transition, and the radius of the circular arc is set to 8-24% of the corresponding straight groove in the same ring.

[0009] Furthermore, the arc-shaped groove and the second type of groove are coaxially arranged.

[0010] Furthermore, the depth of the second type of wire trough is greater than the depth of the first type of wire trough, so that the number of conductor layers disposed in the second type of wire trough is greater than the number of conductor layers disposed in the first type of wire trough; and / or,

[0011] The depth of the straight wire groove gradually decreases from the inside to the outside along the second direction, so that the number of wire layers disposed in the straight wire groove is reduced accordingly.

[0012] Furthermore, the winding reel includes a first side plate and two second side plates respectively connected to both sides of the first side plate, wherein the included angle between the second side plates and the first side plate is set to an obtuse angle; wherein,

[0013] The first and second regions are located on the first side panel;

[0014] The connection between the first and second side panels has a perforation for heat dissipation.

[0015] Furthermore, the electromagnetic heating chamber assembly also includes:

[0016] A magnetic shielding layer is located between the winding reel and the housing; the magnetic shielding layer includes a magnetic core or a magnetic shielding component, the material of the magnetic shielding layer is ferrite or nanocrystal, and the length of the magnetic shielding layer is 5-35% of the length of the winding reel.

[0017] Furthermore, the electromagnetic heating chamber assembly also includes:

[0018] A temperature equalizer is connected to the inner wall of the compartment body, and the side of the temperature equalizer away from the compartment body is in contact with the lunch box.

[0019] The thermal conductivity of the temperature equalization element is set to 5 W / (K*m) or higher; further, the thermal conductivity of the temperature equalization element is set to 20-30 W / (K*m);

[0020] The temperature equalization component includes a first temperature equalization plate, which is connected to a first side plate. The thickness of the first temperature equalization plate is adjusted according to the size of the lunch box.

[0021] The second aspect of this utility model provides an electromagnetic heating device comprising: a frame; the electromagnetic heating chamber assembly mounted on the frame; and a drive assembly mounted on the frame, the drive assembly being connected to the power input end of the chamber body to drive the electromagnetic heating chamber assembly to rotate.

[0022] Furthermore, the drive assembly includes: a motor, a driving wheel, a driven wheel, and a transmission component connected to the motor, the transmission component being sleeved on the driving wheel and the driven wheel, and the driven wheel being connected to the power input end of the chamber; the electromagnetic heating device further includes:

[0023] The first detection component is used to detect whether the food container placed inside the container is in a horizontal position and to detect the number of rotations of the container. The first detection component includes a first sensor and a first sensing element. The first sensor is mounted on the frame, and the first sensing element is mounted on the driven wheel. The first sensing element is brought close to the first sensor so that the first sensor detects a signal.

[0024] The second detection component is used to detect whether the rotation number of the chamber exceeds a preset range to prevent excessive tangling of the wires in the connecting groove. The second detection component includes a second sensor and a second sensing element. The second sensor is mounted on the frame, and the second sensing element is mounted on the transmission element. When the second sensing element approaches the second sensor, the second sensor detects a signal, causing the motor to stop rotating.

[0025] Furthermore, the electromagnetic heating device also includes:

[0026] A limiting assembly includes a baffle and a limiting block. The baffle is mounted on the frame and has a notch that mates with a transmission component to allow the component to pass through. The limiting block is mounted on the transmission component.

[0027] When the limit block contacts the baffle, it prevents the transmission component from passing through the opening.

[0028] A third aspect of this utility model provides a vending machine, including the aforementioned electromagnetic heating device.

[0029] The above-mentioned technical solution of this utility model has the following beneficial technical effects:

[0030] In this embodiment of the invention, by setting a groove on the winding spool to accommodate and fix the wire, the wire is wound multiple turns in the first type of groove along the straight groove and the arc groove to form a coil, thus presenting a racetrack-shaped coil. In this way, the racetrack-shaped coil can not only cover a large heating area on the top or bottom surface of the food container, but also avoid the generation of low temperature areas on the diagonal of the rectangular heating surface, and avoid the generation of obvious high temperature points. This can effectively improve the uniformity of heating of the rectangular surface by the electromagnetic coil and prevent uneven heating from causing local scorching. Attached Figure Description

[0031] Figure 1 This is a structural schematic diagram of the electromagnetic heating chamber assembly according to the first embodiment of the present utility model;

[0032] Figure 2 This is a schematic diagram of the winding reel according to the second embodiment of the present utility model;

[0033] Figure 3 This is a structural schematic diagram of the winding reel according to the third embodiment of the present utility model;

[0034] Figure 4 The winding shape of the electromagnetic heating coil is schematically shown;

[0035] Figure 5 A schematic diagram illustrating the magnetic field simulation of an electromagnetic heating coil is shown.

[0036] Figure 6 This is a structural schematic diagram of the electromagnetic heating chamber device according to the fourth embodiment of the present utility model;

[0037] Figure 7 This is a structural schematic diagram of the electromagnetic heating chamber device according to the fifth embodiment of this utility model;

[0038] Figure 8 This is a structural schematic diagram of the electromagnetic heating chamber device according to the sixth embodiment of this utility model.

[0039] Figure label:

[0040] 100. Electromagnetic heating chamber assembly; 11. Winding reel; 12. Chamber body; 13. First type of wire groove; 14. Second type of wire groove; 15. Third type of wire groove; 16. Temperature equalization component; 17. Magnet; 121. First chamber body; 122. Second chamber body; 21. Frame; 22. Motor; 23. Drive wheel; 24. Driven wheel; 25. First sensor; 26. First sensing element; 27. Second sensor; 28. Second sensing element; 29. ​​Transmission component; 30. Meal box; 31. Heating chamber. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the present utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the present utility model. In this document, terms such as first, second, and third are used only to distinguish descriptions and should not be construed as indicating or implying relative importance, or any order or association between them.

[0042] Currently, in related technologies, when electromagnetic heating is used, especially for heating bodies with rectangular surfaces, if the coil is arranged in a rectangular slot, the diagonal of the rectangular heating surface is usually a low-temperature zone, and other areas are prone to generating obvious high-temperature points; if the coil is arranged in a circular slot, the heating area is mainly concentrated on the projected area of ​​the circular coil, and the areas on both sides of the long side where the heating body on the rectangular surface is located are usually low-temperature zones.

[0043] Based on this, this utility model embodiment provides an electromagnetic heating chamber assembly 100, such as... Figures 1-3 As shown, the device includes a winding reel 11 and a housing 12. The housing 12 has a heating cavity 31 for placing a lunchbox 30. One end of the housing 12 has an opening communicating with the heating cavity 31 for placing and removing the lunchbox 30, and the other end of the housing 12 is a power input end. The winding reel 11 is installed on the side of the housing 12, and the inner wall of the winding reel 11 covers the side of the housing 12. The outer wall of the winding reel 11 has a groove for placing wires to heat the lunchbox 30 placed inside the housing 12. The winding reel 11 has a first area. The first area is provided with a plurality of first type wire grooves 13, each of which includes a straight wire groove and an arc-shaped wire groove connected to the straight wire groove. The straight wire groove is configured to extend in a straight line along a first direction and is spaced apart along a second direction. The arc-shaped wire groove is configured to extend in an arc shape along the second direction and is spaced apart along the first direction, so that the wires arranged in the first type wire groove 13 present a plurality of racetrack-shaped arrangements spaced apart from the inside out. The first direction is approximately perpendicular to the second direction.

[0044] In this embodiment of the application, the first direction is, for example, the Y direction, and the second direction is, for example, the X direction. The food container 30 to be cooked can be a metal food container, such as an aluminum foil box. The food container 30 can include a lid and a bottom box. The lid has a protruding first edge, and the bottom box has a protruding second edge. The first edge is fastened to the second edge to seal the lid and the bottom box. The lid and the bottom box are cut along the first direction or the second direction, and the cross-section of both the lid and the bottom box is trapezoidal. The length of the longest side of the food container 30 along the X direction (which can be defined as the narrow side) is less than the length of the longest side along the Y direction (which can be defined as the long side). The narrow side of the food container 30 placed in the heating chamber faces the opening, while the long side of the food container 30 extends along the Y direction. The top and bottom surfaces of the food container 30 are rectangular surfaces. The inner wall of the winding coil 11 covers the side of the chamber 12. The first area can be set to correspond to the top and bottom surfaces of the food container 30. The narrow side of the food container 30 can be aligned with the arc-shaped wire groove area, and the long side of the food container 30 can be aligned with the straight wire groove area. The wire is wound multiple times in the first type of wire groove 13 along the straight wire groove and the arc-shaped wire groove to form a coil, thus presenting a racetrack-shaped coil. In this way, the racetrack-shaped coil can not only cover the heating area of ​​the top or bottom surface of the food container 30 more extensively, but also avoid the generation of low-temperature areas on the diagonal of the rectangular heating surface, as well as avoid the generation of obvious high-temperature points. This can effectively improve the uniformity of heating of the rectangular surface by the electromagnetic coil and prevent uneven heating from causing local scorching.

[0045] In the embodiments of this application, Figure 4 The winding shape of the electromagnetic heating coil is shown, and the details are illustrated through finite element simulation. Figure 4 The rectangular coil shown in figure a, such as Figure 4 The circular coil shown in b, and as shown in Figure 4 The racetrack-shaped coils wound with a circular to rectangular transition groove arrangement, as shown in embodiment c of this application, were subjected to magnetic field simulations, and the results are as follows: Figure 5 As shown, correspondingly Figure 5 d is a schematic diagram simulating the magnetic field of a rectangular coil. Figure 5 e is a schematic diagram simulating the magnetic field of a circular coil. Figure 5 f is a schematic diagram simulating the magnetic field of the racetrack-shaped coil; Figure 5 The colors in the image range from 1 to 7, representing a gradual change in temperature from low to high. Figure 5 As shown in d, when using a rectangular coil for electromagnetic heating, localized overheating is likely to occur, with four very obvious high-temperature points, while the temperature in the diagonal area is too low, resulting in unsatisfactory heating uniformity. Figure 5 In diagram e, the heating temperature is relatively uniform across the projected area of ​​the circular coil, but the temperature is lower in the uncovered outer right-angled area. Figure 5The simulation results show that the racetrack-shaped coil has a large heating area and a relatively uniform heating temperature. The simulation results also show that the magnetic field uniformity of the racetrack-shaped coil wound with the groove arrangement that transitions from a circle to a rectangle is greatly optimized. The magnetic field variances of the rectangular, circular, and racetrack-shaped coil schemes are 0.297, 0.139, and 0.078, respectively. In the magnetic field simulation of the racetrack-shaped coil wound with the groove arrangement that transitions from a circle to a rectangle proposed in this application embodiment, the magnetic field variance is reduced by 74% compared to the rectangular coil scheme.

[0046] In some embodiments, the winding spool 11 further has a second region located within the first region; the second region is provided with a plurality of second type wire grooves 14, which are arranged as annular rings spaced apart from the inside out and coaxially arranged, so that the wires arranged in the second type wire grooves 14 present multiple annular rings; wherein, the second type wire grooves 14 are connected to the first type wire grooves 13, so that the wires are wound sequentially through the second type wire grooves 14 and then enter the first type wire grooves 13 for winding.

[0047] Specifically, the second region is located at the center of the winding disc 11, and the second type of wire groove 14 in the second region is set as a ring, which is more conducive to the winding of the coil; the center position can be set as the starting point of the winding of the wire.

[0048] In some embodiments, the winding spool 11 includes a first side plate and two second side plates respectively connected to both sides of the first side plate, and the included angle between the second side plate and the first side plate is set to an obtuse angle; wherein, the first region and the second region are located on the first side plate; a hollow is provided at the connection between the first side plate and the second side plate, and the hollow is used for heat dissipation.

[0049] Specifically, for ease of installation and disassembly, two winding reels 11 can be provided, arranged symmetrically, and can be installed on the side of the compartment 12 using threaded fasteners; the wire grooves in the first and second regions can be provided on the first side plate, and a third region can also be provided on the winding reel 11. The third region can surround the outer periphery of the first region, and a third type of annular wire groove 15 is provided in the third region. The third type of wire groove 15 can surround the first side plate and the two second side plates, so that the side wall of the lunch box 30 can also be heated evenly; in order to avoid excessive energy concentration at the connection between the first and second side plates, no wires can be arranged at this connection, and a hollow can be provided for heat dissipation.

[0050] In some embodiments, the depth of the second type of groove 14 is greater than the depth of the first type of groove 13, so that the number of wire layers in the second type of groove 14 is greater than the number of wire layers in the first type of groove 13. Specifically, the width of the first type of groove 13 and the second type of groove 14 can be set to be the same, slightly larger than the outer diameter of the wire, to fix the wire. The center position of the winding reel 11 is the starting point of the winding. At this position, the extension direction of the coil changes rapidly, and the generated magnetic fields partially cancel each other out. The groove depth of the second type of groove 14 in the second region is greater than the groove depth of the first type of groove 13, so that more wire layers can be accommodated. For example, three layers of wire can be set in the second type of groove 14, while two or one layers of wire can be set in the first type of groove 13. Therefore, setting more layers of wire in the second type of groove 14 in the second region increases the current in the vertical direction due to the increased number of coil turns, which can increase the magnetic field strength to compensate for the canceled magnetic field, thereby making the heating of the lunch box 30 more uniform.

[0051] In some embodiments, the depth of the straight wire groove gradually decreases from the inside to the outside along the second direction, so as to correspondingly reduce the number of wire layers disposed within the straight wire groove. Specifically, the depth of the straight wire groove gradually decreases from the inside to the outside along the X direction, that is, from the middle of the first side plate towards both sides near the second side plate, the depth of the straight wire groove gradually decreases, and correspondingly, the number of wire layers within the straight wire groove gradually decreases, thereby avoiding excessive energy concentration at the connection between the first and second side plates, which would lead to uneven heating of the heated food container. In addition, from the middle of the first side plate towards both sides near the second side plate, the first side plate gradually arches, which correspondingly increases the distance between the coil and the container 12, thereby avoiding excessive energy concentration at the connection between the first and second side plates, which would lead to uneven heating of the heated food container. The specific form of the arch is not limited; the cross-section of the arched position (perpendicular to the long side of the food container) can be stepped or a smooth curve.

[0052] In some embodiments, the connection between the arc-shaped groove and the straight groove is set as a circular arc transition, and the radius of the circular arc is set to 8-24% of the corresponding straight groove in the same ring.

[0053] In some embodiments, the arc-shaped groove and the second type of groove 14 are coaxially arranged.

[0054] In some embodiments, the electromagnetic heating chamber assembly 100 further includes a magnetic shielding layer located between the winding reel 11 and the chamber body 12; the magnetic shielding layer includes a magnetic core or a magnetic shielding component, the material of the magnetic shielding layer is ferrite or nanocrystal, and the length of the magnetic shielding layer is 5-35% of the length of the winding reel.

[0055] Specifically, between the winding spool 11 and the housing 12, the magnetic field at a specific location can be reduced by adding a magnetic core or a magnetic shielding sheet, thereby lowering the temperature. For example, the magnetic core material can be ferrite or nanocrystal with a thickness of 2-6mm. The length of the magnetic core accounts for 5-35% of the length of the winding spool. If the magnetic core length is too short, the magnetic shielding capability is limited; if the magnetic core length is too long, the coil energy conversion efficiency is reduced, the temperature of the winding spool 11 is too high, and the energy consumption is large.

[0056] In some embodiments, the electromagnetic heating chamber assembly 100 further includes: a temperature equalization element 16 connected to the inner wall of the chamber body 12, the other side of the temperature equalization element 16 opposite to the chamber body 12 contacting the lunch box 30; the thermal conductivity of the temperature equalization element 16 is set to 5 W / (K*m) or higher; in an exemplary embodiment, the thermal conductivity of the temperature equalization element 16 is set to 20-30 W / (K*m); the temperature equalization element 16 includes a first temperature equalization plate connected to a first side plate, the thickness of the first temperature equalization plate being adjusted according to the size of the lunch box 30.

[0057] Specifically, when the heating method is electromagnetic heating, the container 12 can be made of non-metallic materials (such as plastic or ceramic), and the food container is an aluminum foil box. To ensure more even heating of the food container, a heat spreader can be installed at the bottom of the food container, which also serves as a structural support. The heat spreader has a high thermal conductivity but is neither electrically nor magnetically conductive, thus avoiding electromagnetic shielding. The heat spreader can be made of ceramic materials, such as microcrystalline glass, with a thermal conductivity of 1.7 W / (K*m). Furthermore, materials with even higher thermal conductivity can be selected instead of microcrystalline glass, such as alumina (thermal conductivity of 20-30 W / (K*m)) or silicon carbide (thermal conductivity of approximately 83.6 W / (K*m)). If the heat spreader is made of alumina, the high thermal conductivity of the alumina significantly improves the temperature uniformity of the electromagnetic heating process. The heat spreader plate and the chamber body 12 can be bonded together using a high-temperature resistant adhesive. By selecting heat spreader plates of different thicknesses, the size of the lunchboxes that the electromagnetic chamber can accommodate can be fine-tuned. For example, the thicker the heat spreader plate, the smaller the gap between the upper and lower heat spreader plates, which can accommodate lunchboxes with smaller heights. A smaller gap between the upper and lower heat spreader plates also reduces the shaking of the lunchbox during rotation. Through holes can also be provided in the area of ​​the chamber body 12 covered by the heat spreader plate to reduce the weight of the chamber body 12.

[0058] In some embodiments, the chamber 12 may include a first chamber 121 and a second chamber 122 symmetrically arranged with respect to the first chamber 121. The first chamber 121 and the second chamber 122 are connected as a whole by threaded fasteners. The cross-section of the chamber 12 is approximately hexagonal, that is, the chamber 12 includes a top surface, a bottom surface, and four side surfaces. Correspondingly, two winding reels 11 cover the side surfaces of the first chamber 121 and the second chamber 122, respectively. Magnets 17 may be provided on the outer side of the winding reels 11 to concentrate the magnetism and avoid insufficient magnetic field strength in local areas of the heating cavity.

[0059] This utility model embodiment also provides an electromagnetic heating device, such as... Figures 6-8 As shown, it includes: a frame 21, an electromagnetic heating chamber assembly 100, and a drive assembly. Both the electromagnetic heating chamber assembly 100 and the drive assembly are mounted on the frame 21. The drive assembly is connected to the power input terminal of the chamber body 12 to drive the electromagnetic heating chamber assembly 100 to rotate.

[0060] In some embodiments, the drive assembly includes: a motor 22, a drive wheel 23, a driven wheel 24, and a transmission component 29 connected to the motor 22, the transmission component 29 being sleeved on the drive wheel 23 and the driven wheel 24, and the driven wheel 24 being connected to the power input end of the chamber 12; the electromagnetic heating device further includes:

[0061] The first detection component includes a first sensor 25 and a first sensing element 26. The first sensor 25 is mounted on the frame 21, and the first sensing element 26 is mounted on the driven wheel 24. When the first sensing element 26 approaches the first sensor 25 and the first sensor 25 detects a signal, it is used to detect whether the lunch box 30 placed in the compartment 12 is in a horizontal position and to detect the number of rotations of the compartment 12.

[0062] The second detection component includes a second sensor 27 and a second sensing element 28. The second sensor 27 is mounted on the frame 21, and the second sensing element 28 is mounted on the transmission component 29. When the second sensing element 28 approaches the second sensor 27, and the second sensor 27 detects a signal, the motor 22 stops rotating to prevent the rotation number of the chamber 12 from exceeding the preset range, thereby preventing the cables of the wires in the connecting groove from becoming excessively tangled.

[0063] Specifically, the transmission component 29 can be a synchronous belt or a belt to achieve meshing transmission with the driving wheel 23 and the driven wheel 24; the first sensor 25 is, for example, a proximity photoelectric sensor, which can be located at the bottom of the frame 21; the second sensor 27 is, for example, a limit switch; each time the equipment restarts, for example, the motor 22 rotates forward, driving the first sensing element 26 on the belt to rotate and triggering the first sensor 25, at which time it can be determined that the food container 30 placed in the compartment 12 is in a horizontal position; the motor 22 then performs the first reversal rotation, that is, the motor 22 reverses, thereby driving the electromagnetic compartment to rotate by a preset angle. When it drives the second sensing element 28 on the belt to rotate and triggers the limit switch, the motor 22 stops. Then the motor 22 performs the second reversal rotation, that is, the motor 22 rotates forward, causing the belt to drive the electromagnetic compartment to rotate by a preset angle. When the limit switch is triggered again, the motor 22 stops. Then the motor 22 performs the third reversal rotation, and so on in a cycle; the number of times the first sensing element 26 triggers the first sensor 25 can be counted as the number of rotations of the compartment 12.

[0064] In some embodiments, the electromagnetic heating device further includes a limiting component comprising a baffle and a limiting block. The baffle is mounted on the frame 21 and has a notch adapted to the transmission member 29 to allow the transmission member 29 to pass through the notch. The limiting block is mounted on the transmission member 29. When the limiting block contacts the baffle, it prevents the transmission member 29 from passing through the notch. By setting the baffle and the limiting block, and preventing the transmission member 29 from passing through the notch when the limiting block contacts the baffle, damage to the equipment can be prevented due to excessive rotation of the motor 22 when the limit switch is triggered, as the motor 22 does not stop.

[0065] This utility model embodiment also provides a vending machine, including the aforementioned electromagnetic heating device. The vending machine may further include a refrigerator and a cooking cabinet. The refrigerator can store food containers to be cooked, which contain fresh, pre-treated ingredients. The cooking cabinet can be equipped with multiple electromagnetic heating devices, which are used to cook the pre-treated ingredients on-site or employ other cooking methods to improve the taste and freshness of the food.

[0066] Select the appropriate electromagnetic heating device according to the cooking process to cook the ingredients, and then send the food container to be cooked to the corresponding electromagnetic heating chamber assembly 100. The electromagnetic heating chamber assembly can be heated by electromagnetic coil heating. Figure 8As shown, the electromagnetic heating device may further include a door 201, with a heating chamber located within the chamber. The heating chamber is used to accommodate the food container 30 to be cooked. The door 201 is designed to move up and down. When the door 201 descends to the first position, it seals the heating chamber. When the door 201 rises to the second position, the food container to be cooked can enter the heating chamber for heating, or the cooked food container can be removed. A motor drives the electromagnetic heating chamber assembly to rotate, causing the food container 30 to flip and stir the food inside. The vending machine can set different heating times, temperatures, power, and stirring speeds according to the type of food to be cooked, ensuring that the food is evenly stir-fried at high temperatures, fully undergoing the Maillard reaction, and improving the taste.

[0067] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. An electromagnetic heating chamber assembly, characterized in that, include: The compartment has a heating chamber for holding lunch boxes; A winding reel is installed on the side of the compartment, with its inner wall covering the side of the compartment. The outer wall of the winding reel has grooves for placing wires to heat the food containers placed inside the compartment. The winding reel has a first region, in which a plurality of first-type wire grooves are provided. The first-type wire grooves include straight wire grooves and arc-shaped wire grooves communicating with the straight wire grooves. The straight wire grooves are arranged to extend in a straight line along a first direction and are spaced apart along a second direction. The arc-shaped wire grooves are arranged to extend in an arc shape along the second direction and are spaced apart along the first direction, so that the wires arranged in the first-type wire grooves present multiple racetrack shapes spaced apart from the inside out. The first direction is roughly perpendicular to the second direction.

2. The electromagnetic heating chamber assembly according to claim 1, characterized in that, The winding spool also has a second region located within the first region; the second region is provided with multiple second-type wire grooves, which are arranged in coaxial, spaced-apart rings from the inside out, so that the wires arranged within the second-type wire grooves form multiple rings; wherein... The second type of wire groove is connected to the first type of wire groove, so that the wire is wound through the second type of wire groove in sequence before entering the first type of wire groove for winding.

3. The electromagnetic heating chamber assembly according to claim 1, characterized in that, The connection between the arc-shaped groove and the straight groove is set as a circular arc transition, and the radius of the circular arc is set to 8-24% of the corresponding straight groove in the same ring.

4. The electromagnetic heating chamber assembly according to claim 1, characterized in that, The depth of the second type of wire trough is greater than the depth of the first type of wire trough, so that the number of conductor layers in the second type of wire trough is greater than the number of conductor layers in the first type of wire trough; and / or, The depth of the straight wire groove gradually decreases from the inside to the outside along the second direction, so that the number of wire layers disposed in the straight wire groove is reduced accordingly.

5. The electromagnetic heating chamber assembly according to claim 1, characterized in that, The winding reel includes a first side plate and two second side plates respectively connected to both sides of the first side plate, wherein the included angle between the second side plates and the first side plate is set to an obtuse angle; wherein, The first and second regions are located on the first side panel; The connection between the first and second side panels has a perforation for heat dissipation.

6. The electromagnetic heating chamber assembly according to claim 1, characterized in that, Also includes: A magnetic shielding layer is located between the winding reel and the housing; the magnetic shielding layer includes a magnetic core or a magnetic shielding component, and the length of the magnetic shielding layer is set to 5-35% of the length of the winding reel.

7. The electromagnetic heating chamber assembly according to claim 5, characterized in that, Also includes: A temperature equalizer is connected to the inner wall of the compartment body, and the side of the temperature equalizer away from the compartment body is in contact with the lunch box. The thermal conductivity of the temperature equalization element is set to be 5 W / (K*m) or higher; The temperature equalization component includes a first temperature equalization plate, which is connected to a first side plate. The thickness of the first temperature equalization plate is adjusted according to the size of the lunch box.

8. An electromagnetic heating device, characterized in that, include: frame; The electromagnetic heating chamber assembly as described in any one of claims 1-7 is mounted on a frame; A drive assembly, mounted on a frame, is connected to the power input terminal of the chamber to drive the electromagnetic heating chamber assembly to rotate.

9. The electromagnetic heating device according to claim 8, characterized in that, The drive assembly includes: a motor, a driving wheel, a driven wheel, and a transmission component connected to the motor; the transmission component is sleeved on the driving wheel and the driven wheel; the driven wheel is connected to the power input end of the chamber; the electromagnetic heating device further includes: The first detection component is used to detect whether the food container placed inside the container is in a horizontal position and to detect the number of rotations of the container. The first detection component includes a first sensor and a first sensing element. The first sensor is mounted on the frame, and the first sensing element is mounted on the driven wheel. The first sensing element is brought close to the first sensor so that the first sensor detects a signal. The second detection component is used to detect whether the rotation number of the chamber exceeds a preset range to prevent excessive tangling of the wires in the connecting groove. The second detection component includes a second sensor and a second sensing element. The second sensor is mounted on the frame, and the second sensing element is mounted on the transmission element. When the second sensing element approaches the second sensor, the second sensor detects a signal, causing the motor to stop rotating.

10. A vending machine, characterized in that, Includes the electromagnetic heating device as described in claim 8 or 9.

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