Cooking equipment

Abstract

The utility model provides cooking equipment, and relates to the technical field of electromagnetic heating. The cooking equipment comprises an inner pot, an outer pot, an inner pot cover and an outer pot cover, the first coil is wound on the side wall, the first coil comprises M sub-coils distributed in the height direction of the inner pot, the M sub-coils comprise at least two first sub-coils, and the average interval between every two adjacent first sub-coils is D; the first coil further comprises a spacing part, the width of the spacing part is H in the height direction of the inner pot, H is larger than or equal to 5D, and M is a positive integer. According to the cooking device, the heat concentration ratio can be reduced, so that cooked rice is uniform in hardness and smooth in surface.

Description

Technical Field

[0001] This application relates to the technical field of electromagnetic heating, and more particularly, to a cooking device. Background Art

[0002] In the related art, an electromagnetic heating cooking device generates a magnetic field through a coil disk, and generates a heating current on a cookware through the magnetic field, so as to directly generate heat on the cookware, and the thermal efficiency is significantly higher than that of the traditional heating method.

[0003] In order to improve the heating efficiency, the electromagnetic coil generally needs to cover the surface of the cookware as much as possible. Since the temperature rise rate of electromagnetic heating is fast, the heat accumulation rate of the cookware will be significantly faster than the heat conduction rate from the cookware to the food materials. This will cause the heat in the cooking process to rapidly accumulate on the cookware body, resulting in a rapid increase in the temperature of the cookware. When the rice water near the side and bottom of the cookware contacts the high-temperature cookware, it will cause the rice in this part to be over-pasted, resulting in different pasting degrees of the rice at different positions when cooking rice, and the cooking effect is poor. Summary of the Utility Model

[0004] This application aims to solve at least one of the technical problems existing in the prior art or related technologies.

[0005] To this end, this application provides a cooking device.

[0006] In view of this, this application provides a cooking device, which includes: an inner pot, the inner pot includes a side wall; a first coil, the first coil is wound around the side wall, the first coil includes M sub-coils distributed along the height direction of the inner pot, M sub-coils include at least two first sub-coils, and the average interval between two adjacent first sub-coils is D; the first coil further includes a spacing part, and in the height direction of the inner pot, the width of the spacing part is H, H≥5D, where M is a positive integer.

[0007] In this technical solution, the cooking device includes but is not limited to cooking devices such as rice cookers, electric soup pots, and electric pressure cookers. The cooking device includes an inner pot and a first coil. The first coil is wound around the side wall of the inner pot. After being powered on, the first coil can generate a continuously alternating electromagnetic field. This continuously alternating electromagnetic field continuously cuts the metal cookware, and can generate eddy currents in the metal side wall of the inner pot. When the current flows through the metal cookware, Joule heat is generated, so as to realize heating and cooking of the food materials in the pot, such as rice and water.

[0008] Since the heating speed of electromagnetic heating is relatively fast, taking an electromagnetic heating coil with a power of 1000W as an example, the efficiency of electromagnetic heating can reach 3.3°C / s, and it only takes more than 20 seconds to heat the inner pot from room temperature to 100°C. This speed is significantly faster than the heat conduction speed of the inner pot itself, so it is easy to cause excessive heat concentration in a local area.

[0009] In view of the above problem of concentrated heating heat, the embodiment of the present application designs a heating coil, that is, the above-mentioned first coil. The first coil includes multiple layers of sub-coils spaced apart in the height direction of the inner pot. By arranging the multiple layers of sub-coils, the first coil can cover and wrap the side wall of the inner pot, thereby realizing uniform heating of the inner pot.

[0010] The first coil includes a spacing part. Exemplarily, the number of spacing parts is one or more.

[0011] Wherein, in the height direction of the inner pot, if the width of the spacing part is set as H, then H is not less than 5 times the spacing D of the first sub-coil, that is, the following relational expression (1) is satisfied:

[0012] H≥5D. (1)

[0013] It can be understood that when the spacing part is provided, the width H of the spacing part does not participate in the calculation of the average spacing D.

[0014] Exemplarily, H≥7D.

[0015] Due to the provision of the spacing part, the spacing part divides the first coil into upper and lower coil parts. At the same time, since the width of the spacing part is not less than 5 times the spacing of the first sub-coil, the magnetic fields generated by the upper and lower coil parts will not have an obvious heating effect on the position of the inner pot opposite to the spacing part. This makes the position of the inner pot opposite to the spacing part only heat up through the heat conduction of the inner pot itself. This part of the area is defined as the weak heat area here.

[0016] At this time, the upper and lower parts of the first coil respectively form two strong heat areas on the inner pot. The two strong heat areas can transfer heat to the weak heat area at the same time. Since the inner pot is generally made of a metal pot body and the heat conduction speed of the metal itself is very fast, the speed of heat transfer from the strong heat area to the weak heat area is significantly faster than the speed of heat transfer to the food ingredients. This enables the heat in the strong heat area to be quickly transferred to the weak heat area, avoiding the problem of rapid temperature rise of the pot body caused by heat concentration and preventing the rice close to the inner pot from being over-pasted. At the same time, due to the existence of the strong heat area and the weak heat area, a temperature difference will also be generated in the rice water in the pot. The convection effect brought about by this temperature difference can stir the rice water to a certain extent, making the rice water in different areas move and mix, so that the degree of gelatinization of the rice can be uniform during cooking and the cooking effect can be improved.

[0017] In some technical solutions of the present application, optionally, at least N of the M sub-coils are single-turn coils, both M and N are positive integers, and N / M≥2 / 5.

[0018] In the technical solution of the present application, the first coil includes multiple layers of sub-coils arranged at intervals in the height direction of the inner pot. By arranging multiple layers of sub-coils, the first coil can cover and wrap the side wall of the inner pot, thereby realizing uniform heating of the inner pot.

[0019] Among them, the number of turns of the coil is positively correlated with the heating power of the coil. The more turns the coil has, the stronger the generated magnetic field, the higher the heating power, and at the same time, it is more likely to cause the problem of heat concentration caused by local concentration of the heating power. Limited by the processing technology, the wire diameter of the coil cannot be made small enough. Therefore, in order to meet the maximum heating power requirement of the cooking device and avoid the problem of excessive heat concentration in a local area, in the cooking device proposed in the present application, among the multiple layers of sub-coils of the first coil, at least some of the sub-coils are single-turn coils. A single-turn sub-coil means that there is only one turn of the coil at the same height. At the same time, the proportion of the number of single-turn coils in all the sub-coils meets a specific ratio.

[0020] Exemplarily, it is assumed that in the first coil, the coil parts with the same height are regarded as one sub-coil, and the total number of sub-coils is M, that is, a total of M layers of sub-coils are arranged in the height direction of the inner pot. Among the M sub-coils, at least N layers of sub-coils are single-turn sub-coils.

[0021] That is, the total number of sub-coils is M, and the number of single-turn sub-coils is N. Then M and N satisfy the following relational expression (2):

[0022] N / M≥2 / 5. (2)

[0023] That is to say, the proportion of the number of layers of single-turn coils in the first coil to the total number of layers of the first coil is greater than or equal to 40%.

[0024] Exemplarily, the first coil includes 100 layers of sub-coils, and among the 100 layers of sub-coils, 45 layers of single-turn sub-coils are arranged.

[0025] Exemplarily, the first coil includes 100 layers of sub-coils, and all 100 layers of sub-coils are single-turn sub-coils.

[0026] In the technical solution of the present application, by arranging the heating coil as multiple layers of sub-coils arranged at intervals in the height direction of the inner pot side wall, and at least 40% of the sub-coils are single-turn coils, it can effectively prevent excessive heat concentration in a local area of the inner pot side wall, improve the heating uniformity, and when cooking rice, it can make the cooked rice have uniform hardness and a flat surface, improving the cooking effect of the cooking device.

[0027] In addition, the cooking device in the above technical solution provided by the present application may further have the following additional technical features:

[0028] In some technical solutions of the present application, optionally, the surface area of the side wall is S1, and the area covered by the first coil on the side wall is S2, satisfying S2 / S1≥0.48.

[0029] In the technical solution of the present application, when the first coil heats the inner pot, part of the heat of each area on the inner pot comes from the eddy current generated by the coil magnetic field in the metal inner pot body, and the other part comes from the heat conduction of the inner pot itself.

[0030] In order to make the heat distribution on the side wall of the inner pot more uniform when the cooking device is working, it is necessary to ensure the coverage area of the first coil on the side wall of the inner pot.

[0031] Exemplarily, assuming that the total surface area of the side wall of the inner pot is S1, and the area covered by the first coil is S2, the following relational expression (3) is satisfied:

[0032] S2 / S1≥0.48. (3)

[0033] That is to say, the first coil covers at least 48% of the side wall area of the inner pot. Among them, exemplarily, the area covered by the first coil can be regarded as the projection area of the first coil on the surface of the inner pot in the direction perpendicular to the side wall.

[0034] It can be understood that when there is a spacer, if the width H of the spacer ≥ 7D, the area of the spacer is not counted in the coverage area of the first coil.

[0035] In some embodiments, since the inner pot is not completely full when cooking food to prevent boiling over. Taking the rice cooker as an example of the cooking device, a maximum water level line for indicating the maximum water injection amount of the inner pot is generally set on the inner pot of the rice cooker, and there is generally no food above the maximum water level line. Therefore, the maximum height of the first coil should not exceed the maximum water level line too much. On the one hand, it avoids energy waste, and on the other hand, it avoids "dry burning" of the side wall.

[0036] Exemplarily, when the cooking device is placed on a horizontal plane, the height difference between the setting height of the highest layer in the first coil and the height of the maximum water level line is less than or equal to a preset height difference.

[0037] Exemplarily, the range of the above preset height difference is 0 mm to 10 mm.

[0038] Exemplarily, the above preset height difference is 5 mm.

[0039] The technical solution of the present application can improve the uniformity of lateral heating when the cooking device is working and ensure the heating effect by restricting the ratio of the first coil covering the side wall of the inner pot to be not less than 48%.

[0040] In some technical solutions of the present application, optionally, the inner pot further includes a pot mouth and a bottom wall. The side wall includes a first wall segment and a second wall segment. The first end of the first wall segment forms the pot mouth. The second end of the first wall segment is connected to the first end of the second wall segment. The second segment of the second wall segment is connected to the bottom wall. In the direction from the pot mouth to the bottom wall, the inner diameter of the second wall segment decreases.

[0041] In the technical solution of the present application, the inner pot is a "spherical pot". In the height direction of the inner pot, the inner pot sequentially includes a pot mouth, a side wall, and a bottom wall. Among them, the side wall of the inner pot is divided into a first wall segment and a second wall segment. The first wall segment is the wall segment close to the pot mouth, and the second wall segment is the wall segment close to the bottom wall. Exemplarily, the junction of the first wall segment and the second wall segment is the position with the largest inner diameter of the inner pot.

[0042] Since the area of the bottom wall is smaller than the area of the pot mouth, the second wall segment is a hemispherical wall segment that converges inwardly, that is, the inner diameter of the second wall segment decreases in the direction from the pot mouth to the bottom wall.

[0043] Exemplarily, the first wall segment is a cylindrical wall segment.

[0044] Exemplarily, the first wall segment is a hemispherical wall segment, and in the direction from the bottom wall to the pot mouth, the inner diameter of the first wall segment decreases.

[0045] Exemplarily, the area of the pot mouth is greater than or equal to the area of the bottom wall.

[0046] The technical solution of the present application forms a "spherical pot" type inner pot. By reducing the area of the bottom wall, it can promote the formation of cold and hot convection in the inner pot, thereby driving the stirring of the rice and water in the pot and improving the cooking effect.

[0047] In some technical solutions of the present application, optionally, the first wall segment is a cylindrical wall segment. The first coil includes a first coil segment and a second coil segment. The first coil segment is wound around the first wall segment, and the second coil segment is wound around the second wall segment. Among them, the first coil segment includes all the first sub-coils, the second coil segment includes a plurality of second sub-coils, the average interval between two adjacent first sub-coils is D, the average interval between two adjacent second sub-coils is d, and d≥D.

[0048] In this technical solution, the first wall segment is a cylindrical wall segment, that is, the first wall segment is a hollow cylindrical structure. The second wall segment is a hemispherical wall segment. In the direction from the pot mouth to the bottom wall, the second wall segment gradually converges inward, so that the inner diameter is smaller closer to the bottom wall. Exemplarily, the second wall segment is defined as the R part of the inner pot.

[0049] Among them, when the number of the spacer parts is one, the spacer part divides the first coil segment into two upper and lower series-connected coil segments.

[0050] The first coil specifically includes a first coil segment and a second coil segment. Among them, the first coil segment is wound around the outer side of the cylindrical first wall segment, and the second coil segment is wound around the outer side of the second wall segment that gradually converges inward, that is, the outer side of the R part. In the height direction of the inner pot, the first coil segment includes multiple layers of first sub-coils, and the second coil segment includes multiple layers of second sub-coils.

[0051] Exemplarily, the diameters of each layer of sub-coils in the multiple layers of first sub-coils are equal.

[0052] Exemplarily, in the direction from the bottom wall to the pot opening, the diameters of the multiple layers of second sub-coils increase.

[0053] Since the second wall segment converges inward, the volume of ingredients that can be placed at the R part position in the inner pot is smaller than the volume of ingredients that can be placed at the non-R part position in a horizontal plane. Therefore, if the same heating power is used to heat the R part and the non-R part, the temperature of the ingredients at the R part will rise faster. To achieve uniform heating, in this application, the average interval of the second sub-coils is set to be not less than the average interval of the first sub-coils.

[0054] Exemplarily, assuming that the average interval between two adjacent first sub-coils is D, and the average interval between two adjacent second sub-coils is d, the following relational expression (4) is satisfied:

[0055] d≥D. (4)

[0056] Exemplarily, assuming that the intervals of the first sub-coils in the direction from the bottom wall to the pot opening are D1, D2, D3... Dn1 respectively, then D = (D1 + D2 + D3 +... + Dn1) ÷ n1. Among them, n1 is the number of intervals between two adjacent first sub-coils counted.

[0057] Exemplarily, assuming that the intervals of the first sub-coils in the direction from the bottom wall to the pot opening are D1, D2, D3... Dn2 respectively, then D = (D1 + D2 + D3 +... + Dn2) ÷ n2. Among them, n2 is the number of intervals between two adjacent second sub-coils counted.

[0058] The technical solution of this application can offset the faster temperature rise caused by the smaller amount of ingredients placed at the R part due to the inward convergence of the R part of the inner pot by setting the coil interval at the R part of the inner pot to be not less than that at the non-R part, that is, setting the coils at the R part to be relatively sparse, thereby improving the heating uniformity of the cooking device.

[0059] In some technical solutions of this application, optionally, the cooking device further includes: a second coil, the second coil is arranged facing the bottom wall, and the number of the second coils is at least two, and the at least two second coils are arranged at intervals along the circumferential direction of the bottom wall.

[0060] In this technical solution, the second coil is the bottom coil of the cooking device. The magnetic field generated by the bottom coil can generate eddy currents on the inner bottom wall of the inner pot, thereby heating the inner pot of the cooking device from below. Exemplarily, the number of the second coils is at least two, and the at least two second coils are arranged at intervals along the circumferential direction of the bottom wall of the inner pot, so as to cover a relatively large area of the inner bottom wall.

[0061] Exemplarily, the number of the second coils is 2, and the 2 second coils are distributed in an "L" shape.

[0062] Exemplarily, the number of the second coils is 3, and the 3 second coils are distributed in a "pin" shape.

[0063] Exemplarily, the number of the second coils is 4, and the 4 second coils are distributed in a [shape].

[0064] Exemplarily, the current directions in at least two second coils are all the same.

[0065] Exemplarily, the current directions in two adjacent second coils among the at least two second coils are opposite.

[0066] Exemplarily, the current directions in two adjacent second coils among the at least two second coils are the same.

[0067] In some technical solutions of the present application, optionally, in the direction from the bottom wall to the pot mouth, the diameters of multiple second sub-coils increase; the diameter of the minimum circumscribed circle of at least two second coils is greater than the minimum value of the diameters of the second sub-coils.

[0068] In this technical solution, the second sub-coil is the sub-coil arranged in the R part. In the direction from the bottom of the pot to the pot mouth, the diameter of the second sub-coil increases, so that the second sub-coil can better fit the hemispherical transition area of the inner pot. Wherein, the diameter of the maximum circumscribed circle of the second coil is less than or equal to the diameter of the second sub-coil with the largest diameter.

[0069] The technical solution of the present application prevents the bottom coil from exceeding the inner pot and causing energy waste by setting that the projected area of the bottom coil in the vertical direction is not greater than the diameter of the coil with the largest middle diameter among the side coils.

[0070] In some technical solutions of the present application, optionally, the diameter of the minimum circumscribed circle of at least two second coils is less than or equal to the diameter of the first sub-coil.

[0071] In this technical solution, the diameter of the maximum circumscribed circle of the second coil is greater than or equal to the diameter of the second sub-coil with the smallest diameter.

[0072] For a spherical pot with an inwardly tapered bottom, due to processing accuracy limitations, the distance between the first coil, specifically the second coil segment and the R portion of the inner pot sidewall, is usually greater than the distance between the first coil segment and the non-R portion of the inner pot sidewall. By setting the diameter of the minimum circumscribed circle of the second coil to be greater than the minimum diameter of the second sub-coil, the second coil can cover the R portion and perform supplementary heating on the R portion.

[0073] The technical solution of this application sets the bottom coil to cover the R portion area of the inner pot of the spherical pot in the vertical direction, thereby performing supplementary heating on the inwardly tapered hemispherical R portion area, making the heat distribution in the inner pot more uniform and improving the cooking effect of the cooking device.

[0074] In some technical solutions of this application, optionally, the cooking device further includes: a bracket assembly, and the bracket assembly includes a receiving cavity for receiving the inner pot.

[0075] In this technical solution, the cooking device includes a bracket assembly, and a receiving cavity for placing the inner pot is formed inside the bracket assembly. Exemplarily, when the inner pot is placed at a preset position in the receiving cavity, the bracket assembly forms a semi-wrapping state on the inner pot, and at this time, the peripheral sidewall of the bracket assembly covers at least more than half of the area of the inner pot sidewall.

[0076] Exemplarily, a winding portion for winding the first coil and the second coil can be provided on the bracket assembly, thereby realizing the winding of the first coil and the second coil.

[0077] The technical solution of this application can play a role in stabilizing the inner pot by setting the bracket assembly, and at the same time is conducive to the winding of the first coil and the second coil, reducing the processing technology difficulty.

[0078] In some technical solutions of this application, optionally, the bracket assembly includes: a first bracket, the first bracket includes a first winding portion, and the first coil is wound around the first winding portion; a second bracket, the second bracket is connected to the first bracket, and the second bracket includes a second winding portion, and the second coil is wound around the second winding portion.

[0079] In this technical solution, the bracket assembly includes a first bracket and a second bracket. Among them, the first bracket is in a bowl-shaped structure, a receiving cavity is formed inside the first bracket, and the first bracket includes a first winding portion. Exemplarily, the first winding portion is a multi-layer winding groove, and the multi-layer winding grooves are evenly distributed in the height direction of the inner pot.

[0080] The second bracket is disposed at the bottom of the first bracket and is connected to the first bracket. A second wire winding portion is provided on the second bracket, and a second coil is wound around the second wire winding portion. Exemplarily, the second wire winding portion includes a winding shaft, a wire routing groove, and a leaf-shaped fixing structure. Exemplarily, the second bracket can be connected to the bottom wall of the first bracket through a connecting member such as a bolt. Exemplarily, in some possible implementation manners, the number of the second wire winding portions corresponds to the number of the second coils, that is, one second coil is wound around each second wire winding portion. Exemplarily, in some other possible implementation manners, the number of the second wire winding portions is not less than the number of the second coils, that is, a plurality of second wire winding portions are preset at the bottom of the first bracket, and several of the second wire winding portions are selected to wind the second coils according to different models of the cooking device, so that different models of cooking devices can share the same bracket assembly.

[0081] In the present application, by providing the first bracket and the second bracket, the first bracket includes a first wire winding portion, and the second bracket includes a second wire winding portion. The first wire winding portion and the second wire winding portion are respectively used for winding the first coil and the second coil, which is beneficial to reducing the assembly difficulty during the production and assembly of the cooking device and improving the production efficiency.

[0082] In some technical solutions of the present application, the second bracket includes: a body, on which a winding shaft, a wire threading hole, and a wire fixing portion are provided; a wire pressing portion, which is connected to the winding shaft of the body, and a second wire winding portion is formed between the wire pressing portion and the body, and heat dissipation holes are provided on the wire pressing portion; wherein, at least two second coils are connected in series, and the outgoing wire end of one second coil passes from one side of the body through the wire threading hole to the other side of the body, and after passing through the wire fixing portion, is connected to the incoming wire end of another second coil.

[0083] In this technical solution, the second bracket includes a body and a wire pressing portion. Among them, a winding shaft is provided on the body. When winding the first coil, the wire is wound around the winding shaft as the rotation axis to form a second coil. A wire threading hole and a wire fixing portion are also provided on the body. At least two second coils are connected in series in sequence. After winding one second coil, the outgoing wire end of this second coil passes through the wire threading hole on the body, is transmitted from the second wire winding portion on one side of the body to the other side of the body, and after being fixed by the wire fixing portion, the wire goes to the next second bracket and winds the next second coil.

[0084] Exemplarily, at least two second coils can be wound in sequence by a complete long wire.

[0085] Exemplarily, in two adjacent second coils, the incoming wire end of one second coil is connected to the outgoing wire end of another second coil through a connector such as a connection terminal.

[0086] Heat dissipation holes are provided on the wire pressing portion, and the heat dissipation area between the second coil and the air is increased through the heat dissipation holes, so as to improve the heat dissipation capacity.

[0087] In the technical solution of the present application, by providing a wire threading hole to thread the outgoing end of a second coil to the back of the second body, and fixing the wire routing between the two second coils through a wire fixing part, it can effectively avoid the problem of the connection wire overlapping and squeezing with the coil, resulting in wire skin damage, prevent faults such as short circuits, and at the same time can effectively improve the stability of the connection wire during transportation, reduce the possibility of wire disconnection caused by transportation vibration, and improve the reliability of the cooking device.

[0088] In some technical solutions of the present application, optionally, the cooking device further includes: a base; a housing connected to the base, and a bracket assembly is located inside the housing; the bracket assembly includes a mounting part, and the position where the mounting part is provided corresponds to the position of the spacer part, and the bracket assembly is connected to the base or the housing through the mounting part; a cover body, which is connected to the housing in an openable and closable manner.

[0089] In this technical solution, the cooking device includes a base, a housing and a cover body, and the bracket assembly is installed on the base. Exemplarily, mounting posts are provided on the base, and exemplarily, the number of mounting posts is at least one. A mounting part is provided on the bracket assembly, and the position where the mounting part is provided corresponds to the spacer part, that is, the mounting part utilizes the space vacated by the spacer part. The bracket assembly is connected to the housing or the base through the mounting part.

[0090] Exemplarily, the bracket assembly is connected to the housing through the mounting part.

[0091] Exemplarily, the bracket assembly is connected to the base through the mounting part.

[0092] Exemplarily, the top of the mounting part includes a screw hole, and the mounting part includes a through hole. During assembly, a bolt is passed through the through hole of the mounting part and then screwed into the screw hole of the mounting post, thereby fixing the bracket assembly on the base. Exemplarily, when connecting and installing the mounting part and the mounting post together, a gap is left between the bracket assembly and the body of the base, thereby preventing the bottom coil from contacting the base and reserving a heat dissipation space for the bottom coil.

[0093] The housing is connected to the base, and an installation cavity is formed by enclosing between the housing and the base, and the bracket assembly is arranged in the installation cavity. The cover body is connected to the top of the housing in an openable and closable manner. When the cover body is in the open state, the opening of the accommodation cavity is exposed, and at this time the user can take out and place the inner pot. When the cover body is in the closed state, the opening of the accommodation cavity is covered by the cover body. At this time, if the inner pot is in the preset position of the accommodation cavity, the inner pot is also in a closed state.

[0094] The technical solution of the present application forms the exposed surface of the cooking device by providing the housing and the cover body, which can wrap the internal components of the cooking device and improve the reliability and aesthetics of the cooking device.

[0095] The technical solution of this application forms the exposed surface of the cooking device by setting a housing and a cover, which can wrap the internal components of the cooking device and improve the reliability and aesthetics of the cooking device. BRIEF DESCRIPTION OF THE DRAWINGS

[0096] The above and / or additional aspects and advantages of this application will become apparent and be readily understood from the following description of embodiments in conjunction with the accompanying drawings, where:

[0097] Figure 1 Schematic structural diagrams of cooking devices showing some embodiments of this application;

[0098] Figure 2 Schematic structural diagrams of the first coil showing some embodiments of this application;

[0099] Figure 3 Schematic structural diagrams of cooking devices showing some embodiments of this application;

[0100] Figure 4 Schematic structural diagrams of cooking devices showing some embodiments of this application;

[0101] Figure 5A Schematic structural diagrams of cooking devices showing some embodiments of this application;

[0102] Figure 5B Schematic structural diagrams of cooking devices showing some embodiments of this application;

[0103] Figure 5C Schematic structural diagrams of cooking devices showing some embodiments of this application;

[0104] Figure 6 Schematic structural diagrams of cooking devices showing some embodiments of this application;

[0105] Figure 7 Schematic structural diagrams of the inner pot showing some embodiments of this application;

[0106] Figure 8A Schematic diagrams of the current direction of the second coil showing some embodiments of this application;

[0107] Figure 8B Schematic diagrams of the current direction of the second coil showing some embodiments of this application;

[0108] Figure 9 Schematic diagrams of the magnetic field direction of the second coil showing some embodiments of this application;

[0109] Figure 10 Schematic diagrams of the magnetic field intensity of the second coil showing some embodiments of this application;

[0110] Figure 11 Schematic diagram of coil magnetic field distribution showing some embodiments of the present application;

[0111] Figure 12A Simulation diagram of heat distribution of cooking equipment in the related art;

[0112] Figure 12B Simulation diagram of heat distribution of cooking equipment showing some embodiments of the present application;

[0113] Figure 13A Schematic diagram of the structure of the bracket assembly showing some embodiments of the present application;

[0114] Figure 13B Schematic diagram of the structure of the bracket assembly showing some embodiments of the present application;

[0115] Figure 14 Schematic diagram of the structure of the bracket assembly showing some embodiments of the present application;

[0116] Figure 15 Schematic diagram of the structure of the bracket assembly showing some embodiments of the present application;

[0117] Figure 16 Schematic diagram of the structure of the bracket assembly showing some embodiments of the present application;

[0118] Figure 17 Schematic diagram of the structure of the bracket assembly showing some embodiments of the present application;

[0119] Figure 18 Schematic diagram of the structure of the bracket assembly showing some embodiments of the present application;

[0120] Figure 19 Schematic diagram of the structure of the second bracket showing some embodiments of the present application;

[0121] Figure 20 Schematic diagram of the winding of the second coil showing some embodiments of the present application;

[0122] Figure 21 Schematic diagram of the structure of cooking equipment showing some embodiments of the present application.

[0123] Reference numerals:

[0124] 100 Cooking device, 102 inner pot, 1022 side wall, 10222 first wall segment, 10224 second wall segment, 1024 bottom wall, 1026 pot opening, 104 first coil, 1041 sub-coil, 1042 first coil segment, 10422 first sub-coil, 1044 second coil segment, 10442 second sub-coil, 106 spacer, 108 second coil, 110 bracket assembly, 1102 first bracket, 11022 first winding part, 1104 second bracket, 11041 second winding part, 11042 body, 11043 wire pressing part, 11044 winding shaft, 11045 wire threading hole, 11046 wire fixing part, 11047 heat dissipation hole, 1106 accommodation cavity, 1108 mounting part, 112 base, 114 housing, 116 cover. Detailed implementation manners

[0125] In order to more clearly understand the above objects, features and advantages of the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific implementation manners. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0126] In the following description, many specific details are set forth in order to fully understand the present application. However, the present application can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below.

[0127] The following refers to Figures 1 to 21 Describe a cooking device provided according to some embodiments of the present application.

[0128] In some embodiments of the present application, a cooking device is provided. Figure 1 、 Figures 3 to 6 Shows a schematic structural diagram of a cooking device according to some embodiments of the present application. Figure 2 Shows a schematic structural diagram of a first coil according to some embodiments of the present application. Figure 7 Shows a schematic structural diagram of an inner pot according to some embodiments of the present application.

[0129] Such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5A 、 Figure 5B 、 Figure 5C 、 Figure 6 And Figure 7As shown in the figure, the cooking device 100 includes: an inner pot 102, and the inner pot 102 includes a side wall 1022; a first coil 104 wound around the side wall 1022. The first coil 104 includes M sub-coils 1041 distributed along the height direction of the inner pot 102. The M sub-coils 1041 include at least two first sub-coils, and the average interval between two adjacent first sub-coils 10422 is D. The first coil 104 further includes a spacing portion 106. In the height direction of the inner pot 102, the width of the spacing portion 106 is H, and H≥5D, where M is a positive integer.

[0130] In this embodiment, the cooking device 100 includes, but is not limited to, cooking devices 100 such as rice cookers, electric soup pots, and electric pressure cookers. The cooking device 100 includes an inner pot 102 and a first coil 104. The first coil 104 is wound around the side wall 1022 of the inner pot 102. After being powered on, the first coil 104 can generate a continuously alternating electromagnetic field. This continuously alternating electromagnetic field continuously cuts the cookware made of metal material, and can generate eddy currents in the metal side wall 1022 of the inner pot 102. When the current flows through the metal cookware, Joule heat is generated, so as to realize heating and cooking of the food materials in the pot, such as rice and water.

[0131] Since the heating speed of electromagnetic heating is relatively fast, taking an electromagnetic heating coil with a power of 1000W as an example, the heating efficiency of electromagnetic heating can reach 3.3℃ / s. It only takes more than 20 seconds to heat the inner pot 102 from room temperature to 100℃. This speed is significantly faster than the heat conduction speed of the inner pot 102 itself. Therefore, it is easy to cause excessive heat concentration in a local area.

[0132] In view of the above problem of concentrated heating heat, the embodiment of the present application designs a heating coil, that is, the above-mentioned first coil 104. Figure 1 The arrow A in the figure shows the height direction of the above-mentioned inner pot 102. The first coil 104 includes multiple layers of sub-coils arranged at intervals in the height direction of the inner pot 102. By arranging multiple layers of sub-coils, the first coil 104 can cover and wrap the side wall 1022 of the inner pot 102, so as to realize uniform heating of the inner pot 102.

[0133] The first coil 104 includes a spacing portion 106. Exemplarily, the number of the spacing portions 106 is one or more.

[0134] Wherein, in the height direction of the inner pot 102, if the width of the spacing portion 106 is set as H, then H is not less than 5 times the interval D of the first sub-coil 10422, that is, the following relational expression (1) is satisfied:

[0135] H≥5D. (1)

[0136] It can be understood that when the spacer portion 106 is provided, the width H of the spacer portion 106 does not participate in the calculation of the average interval D.

[0137] Exemplarily, H≥7D.

[0138] Due to the provision of the spacer portion 106, the spacer portion 106 divides the first coil 104 into upper and lower coil portions. At the same time, since the width of the spacer portion 106 is not less than 5 times the interval of the first sub-coil 10422, the magnetic fields generated by the upper and lower coil portions will not have an obvious heating effect on the position of the inner pot 102 opposite to the spacer portion 106. This enables the position of the inner pot 102 opposite to the spacer portion 106 to be heated only by the heat conduction of the inner pot 102 itself. This part of the area is defined as the weak heat area here.

[0139] At this time, the upper and lower parts of the first coil 104 respectively form two strong heat areas on the inner pot 102. The two strong heat areas can transfer heat to the weak heat area at the same time. Since the inner pot 102 is generally made of a metal pot body and the heat conduction speed of the metal itself is very fast, the speed at which the strong heat area transfers heat to the weak heat area is significantly faster than the speed of transferring heat to the food materials. This enables the heat in the strong heat area to be quickly transferred to the weak heat area, avoiding the problem of rapid temperature rise of the pot body caused by heat concentration and preventing the rice close to the inner pot 102 from being over-pasted. At the same time, due to the existence of the strong heat area and the weak heat area, a temperature difference will also be generated in the rice water in the pot. The convection effect brought about by this temperature difference can stir the rice water to a certain extent, making the rice water in different areas move and mix, so that the degree of gelatinization of the rice can be uniform when cooking rice, improving the cooking effect.

[0140] In some embodiments of the present application, optionally, at least N sub-coils among the M sub-coils are single-turn coils, both M and N are positive integers, and N / M≥2 / 5.

[0141] In the embodiments of the present application, the first coil 104 includes multiple layers of sub-coils spaced apart in the height direction of the inner pot 102. By providing multiple layers of sub-coils, the first coil 104 can cover and wrap the side wall 1022 of the inner pot 102, thereby realizing uniform heating of the inner pot 102.

[0142] Among them, the number of turns of the coil is positively correlated with the heating power of the coil. The more turns the coil has, the stronger the generated magnetic field, the higher the heating power, and at the same time, it is more likely to cause the problem of heat concentration due to the local concentration of the heating power. Limited by the processing technology, the wire diameter of the coil cannot be made small enough. Therefore, in order to meet the demand for the maximum heating power of the cooking device 100 and avoid the problem of excessive heat concentration in a local area, in the cooking device 100 proposed in this application, among the multi-layer sub-coils of the first coil 104, at least some of the sub-coils are single-turn coils. The single-turn sub-coil means that there is only one turn of the coil at the same height. At the same time, the proportion of the number of single-turn coils in all the sub-coils 1041 meets a specific ratio.

[0143] Exemplarily, it is assumed that in the first coil 104, the coil parts with the same height are set as one sub-coil, and the total number of sub-coils is M, that is, a total of M layers of sub-coils are set in the height direction of the inner pot 102. Among the M sub-coils, at least N layers of sub-coils are single-turn sub-coils.

[0144] That is, the total number of sub-coils is M, and the number of single-turn sub-coils is N. Then M and N satisfy the following relational formula (2):

[0145] N / M≥2 / 5. (2)

[0146] That is to say, the proportion of the number of layers of single-turn coils in the first coil 104 to the total number of layers of the first coil 104 is greater than or equal to 40%.

[0147] Exemplarily, the first coil 104 includes 100 layers of sub-coils. Among the 100 layers of sub-coils, 45 layers of single-turn sub-coils are provided.

[0148] Exemplarily, the first coil 104 includes 100 layers of sub-coils, and all 100 layers of sub-coils are single-turn sub-coils.

[0149] In the embodiment of the present application, by setting the heating coil as multi-layer sub-coils spaced apart in the height direction of the side wall 1022 of the inner pot 102, and at least 40% of the sub-coils are single-turn coils, it can effectively prevent heat from concentrating excessively in a local area of the side wall 1022 of the inner pot 102, improve the heating uniformity, and when cooking rice, it can make the cooked rice have uniform hardness and a flat surface, improving the cooking effect of the cooking device 100.

[0150] In some embodiments of the present application, optionally, as Figure 3 shown, the surface area of the side wall 1022 is S1, and the area covered by the first coil 104 on the side wall 1022 is S2, satisfying S2 / S1≥0.48.

[0151] In the embodiment of the present application, when the first coil 104 heats the inner pot 102, a part of the heat of each area on the inner pot 102 comes from the eddy current generated by the coil magnetic field in the metal inner pot body 11042, and the other part comes from the heat conduction of the inner pot 102 itself.

[0152] In order to make the heat distribution on the side wall 1022 of the inner pot 102 more uniform when the cooking device 100 is working, it is necessary to ensure the coverage area of the first coil 104 on the side wall 1022 of the inner pot 102.

[0153] Exemplarily, assume that the total surface area of the side wall 1022 of the inner pot 102 is S1, and the area covered by the first coil 104 is S2, and S2 is Figure 3 the sum of S21 and S22, then the following relational expression (3) is satisfied:

[0154] S2 / S1≥0.48. (3)

[0155] That is to say, the first coil 104 covers at least 48% of the area of the side wall 1022 of the inner pot 102. Among them, exemplarily, the area covered by the first coil 104 can be regarded as the projected area of the first coil 104 on the surface of the inner pot 102 in the direction perpendicular to the side wall 1022.

[0156] It can be understood that when the spacer 106 is provided, if the width H of the spacer 106≥7D, the area of the spacer 106 is not counted in the coverage area of the first coil 104. Among them, the projection formed on the surface of the inner pot 102 by the area between the uppermost coil and the lowermost coil of the first coil 104 is the area S2 of the first coil 104 covering the inner pot 102, and this area S2 is also the direct heating area of the first coil 104 on the side wall 1022 of the inner pot 102. When there is a large inter-group distance H between the turns of the first coil 104, the excessive inter-group distance causes this part of the area to exceed the coil magnetic field range, and the magnetic field strength in this part of the area is too low, so enough heat cannot be generated by electromagnetic heating, and only the heat conduction of the cookware itself can be used for heating. Therefore, at this time, the cookware coverage area S h corresponding to the inter-group distance H cannot be included in the coverage area S2 of the first coil 104, so the area of the spacer 106 is not counted in the coverage area of the first coil 104.

[0157] In some embodiments, when cooking food materials in the inner pot 102, to prevent boiling over, the inner pot 102 is not in a completely full state. Taking the cooking device 100 as an electric rice cooker as an example, a maximum water level line for indicating the maximum water injection amount of the inner pot 102 is generally provided on the inner pot 102 of the electric rice cooker. Generally, there is no food material above the maximum water level line. Therefore, the maximum height of the first coil 104 should not exceed the maximum water level line by too much, on the one hand, to avoid energy waste, and on the other hand, to avoid "dry burning" of the side wall 1022.

[0158] Exemplarily, when the cooking device 100 is placed on a horizontal plane, the height difference between the height of the highest layer provided in the first coil 104 and the height of the maximum water level line is less than or equal to a preset height difference.

[0159] Exemplarily, the range of the above-mentioned preset height difference is from 0 mm to 10 mm.

[0160] Exemplarily, the above-mentioned preset height difference is 5 mm.

[0161] By limiting the proportion of the first coil 104 covering the side wall 1022 of the inner pot 102 to be not less than 48% in the embodiments of the present application, the uniformity of lateral heating during the operation of the cooking device 100 can be improved, and at the same time, the heating effect can be ensured.

[0162] In some embodiments of the present application, optionally, as Figure 1 and Figure 7 shown, the inner pot 102 further includes a pot mouth 1026 and a bottom wall 1024. The side wall 1022 includes a first wall section 10222 and a second wall section 10224. The first end of the first wall section 10222 forms the pot mouth 1026. The second end of the first wall section 10222 is connected to the first end of the second wall section 10224. The second section of the second wall section 10224 is connected to the bottom wall 1024. In the direction from the pot mouth 1026 to the bottom wall 1024, the inner diameter of the second wall section 10224 decreases.

[0163] In the embodiments of the present application, the inner pot 102 is a "spherical pot". In the height direction of the inner pot 102, the inner pot 102 sequentially includes a pot mouth 1026, a side wall 1022, and a bottom wall 1024. Among them, the side wall 1022 of the inner pot 102 is divided into a first wall section 10222 and a second wall section 10224. The first wall section 10222 is the wall section close to the pot mouth 1026, and the second wall section 10224 is the wall section close to the bottom wall 1024. Exemplarily, the junction of the first wall section 10222 and the second wall section 10224 is the position where the inner diameter of the inner pot 102 is the largest.

[0164] Since the area of the bottom wall 1024 is smaller than the area of the pot opening 1026, the second wall segment 10224 is a hemispherical wall segment that converges inwardly, that is, the inner diameter of the second wall segment 10224 decreases in the direction from the pot opening 1026 to the bottom wall 1024.

[0165] Exemplarily, the first wall segment 10222 is a cylindrical wall segment.

[0166] Exemplarily, the first wall segment 10222 is a hemispherical wall segment, and in the direction from the bottom wall 1024 to the pot opening 1026, the inner diameter of the first wall segment 10222 decreases.

[0167] Exemplarily, the area of the pot opening 1026 is greater than or equal to the area of the bottom wall 1024.

[0168] In the embodiment of the present application, by providing the "ball pot" type inner pot 102, reducing the area of the bottom wall 1024 can promote the formation of cold and hot convection in the inner pot 102, thereby driving the stirring of the rice and water in the pot and improving the cooking effect.

[0169] In some embodiments of the present application, optionally, as Figure 4 shown in FIG. 5, the first wall segment 10222 is a cylindrical wall segment, the first coil 104 includes a first coil segment 1042 and a second coil segment 1044, the first coil segment 1042 is wound around the first wall segment 10222, and the second coil segment 1044 is wound around the second wall segment 10224; wherein, the first coil segment 1042 includes all the first sub-coils 10422, the second coil segment 1044 includes a plurality of second sub-coils 10442, the average interval between two adjacent first sub-coils 10422 is D, the average interval between two adjacent second sub-coils 10442 is d, and d≥D.

[0170] In this embodiment, the first wall segment 10222 is a cylindrical wall segment, that is, the first wall segment 10222 is a hollow cylindrical structure. The second wall segment 10224 is a hemispherical wall segment, and in the direction from the pot opening 1026 to the bottom wall 1024, the second wall segment 10224 gradually converges inwardly, so that the inner diameter is smaller closer to the bottom wall 1024. Exemplarily, the second wall segment 10224 is defined as the R part of the inner pot 102.

[0171] Wherein, when the number of the spacer portions 106 is one, the spacer portion 106 divides the first coil segment 1042 into two upper and lower series-connected coil segments. Exemplarily, the first coil segment 1042 and the second coil segment 1044 can be obtained by winding with the same wire. After winding the second coil segment 1044, a part of the first coil segment 1042 is wound, and then after spacing the spacer portion 106, the other part of the first coil segment 1042 is wound.

[0172] The first coil 104 specifically includes a first coil segment 1042 and a second coil segment 1044. Among them, the first coil segment 1042 is wound around the outside of the cylindrical first wall segment 10222, and the second coil segment 1044 is wound around the outside of the second wall segment 10224 that gradually converges inward, that is, outside the R part. In the height direction of the inner pot 102, the first coil segment 1042 includes multiple layers of first sub-coils 10422, and the second coil segment 1044 includes multiple layers of second sub-coils 10442.

[0173] Exemplarily, the diameter of each layer of sub-coil in the multiple layers of first sub-coils 10422 is equal.

[0174] Exemplarily, in the direction from the bottom wall 1024 to the pot opening 1026, the diameter of the multiple layers of second sub-coils 10442 increases.

[0175] Since the second wall segment 10224 converges inward, in a horizontal plane, the volume of ingredients that can be placed at the R part position in the inner pot 102 is smaller than the volume of ingredients that can be placed at the non-R part position. Therefore, if the same heating power is used to heat the R part and the non-R part, the temperature of the ingredients at the R part will rise faster. To achieve uniform heating, in this application, the average interval of the second sub-coils 10442 is set to be not less than the average interval of the first sub-coils 10422.

[0176] Exemplarily, as Figure 4 shown in FIG. 5, assuming that the average interval between two adjacent first sub-coils 10422 is D, and assuming that the average interval between two adjacent second sub-coils 10442 is d, then the following relational expression (4) is satisfied:

[0177] d≥D. (4)

[0178] Exemplarily, as Figure 4 shown in FIG. 5, assuming that in the direction from the bottom wall 1024 to the pot opening 1026, the intervals of the first sub-coils 10422 are D1, D2, D3... Dn1 respectively, then D = (D1 + D2 + D3 +... + Dn1) ÷ n1. Among them, n1 is the number of intervals between two adjacent first sub-coils 10422 counted.

[0179] Exemplarily, as Figure 4 shown in FIG. 5, assuming that in the direction from the bottom wall 1024 to the pot opening 1026, the intervals of the first sub-coils 10422 are D1, D2, D3... Dn2 respectively, then D = (D1 + D2 + D3 +... + Dn2) ÷ n2. Among them, n2 is the number of intervals between two adjacent second sub-coils 10442 counted.

[0180] Exemplarily, in some embodiments, the cooking device is further provided with a bottom coil. There is a certain overlapping area between the bottom coil and the first coil 104 at the R portion. Therefore, there will also be a certain synergistic enhancement effect on the heating of the R portion by the bottom coil and the first coil 104. Therefore, by setting the R portion, that is, the interval density of the second sub-coil 10442 at the second wall segment 10224 is small, the heating uniformity can be ensured.

[0181] In the embodiment of the present application, by setting the coil interval of the R portion of the inner pot 102 to be not less than the coil interval of the non-R portion, that is, setting the coils of the R portion to be relatively sparse, it is possible to offset the faster temperature rise caused by the inward convergence of the R portion resulting in less food placement, and improve the heating uniformity of the cooking device 100.

[0182] In some embodiments of the present application, optionally, as Figure 6 shown, the cooking device 100 further includes: a second coil 108. The second coil 108 is arranged towards the bottom wall 1024. The number of the second coils 108 is multiple, and at least two second coils 108 are arranged at intervals along the circumferential direction of the bottom wall 1024.

[0183] In this embodiment, the second coil 108 is the bottom coil of the cooking device 100. The magnetic field generated by the bottom coil can generate eddy currents on the bottom wall 1024 of the inner pot 102, so as to heat the inner pot 102 of the cooking device 100 from below. Exemplarily, the number of the second coils 108 is multiple, and at least two second coils 108 are arranged at intervals along the circumferential direction of the bottom wall 1024 of the inner pot 102, so as to cover a larger area of the bottom wall 1024 of the inner pot 102. Figure 2 The arrow B in shows the circumferential direction of the above bottom wall 1024.

[0184] Exemplarily, the number of the second coils 108 is 2, and the 2 second coils 108 are distributed in a "Lv" shape.

[0185] Exemplarily, the number of the second coils 108 is 3, and the 3 second coils 108 are distributed in a "Pin" shape.

[0186] Exemplarily, the number of the second coils 108 is 4, and the 4 second coils 108 are distributed in a shape.

[0187] Exemplarily, the current directions in at least two second coils 108 are all the same.

[0188] Exemplarily, the current directions in two adjacent second coils 108 among at least two second coils 108 are opposite.

[0189] Exemplarily, the current directions in two adjacent second coils 108 among at least two second coils 108 are the same.

[0190] Exemplarily, Figure 8A 、 Figure 8B 、 Figure 9 and Figure 10 show schematic diagrams of the current directions of the second coils 108 in some embodiments of the present application, Figure 11 and show schematic diagrams of the coil magnetic field distributions in some embodiments of the present application. Figure 8A 、 Figure 8B 、 Figure 9 、 Figure 10 and Figure 11 As shown, the current directions in two adjacent second coils 108 are the same.

[0191] Figure 8A 、 Figure 8B and Figure 10 The arrow B in shows the current direction in the second coil 108. As Figure 8A 、 Figure 8B and Figure 10 shown, since the current directions of at least two second coils 108 are the same, therefore as Figure 9 shown, the magnetic field directions generated by these second coils 108 are the same, which will generate a weak area of magnetic field cancellation between two adjacent coils, and the effect is as Figure 10 shown.

[0192] After considering the heating of the side wall 1022 by the first coil 104, the overall magnetic field of the first coil 104 and the second coil 108 is as Figure 11 shown, Figure 12A shows a heat distribution simulation diagram of a cooking device in the related art, Figure 12B shows a heat distribution simulation diagram of the cooking device 100 in some embodiments of the present application. As Figure 12A and Figure 12B shown, compared with the heat concentration in the overall bottom area in the related art, the way of arranging the first coil 104 and the second coil 108 in the present application makes it more difficult for the heat to concentrate in a local area, thus ensuring the cooking effect.

[0193] In some embodiments of the present application, as Figure 5B and Figure 5C shown, in the direction from the bottom wall 1024 to the pot mouth 1026, the diameters of multiple second sub-coils 10442 increase; the diameter of the minimum circumscribed circle of at least two second coils 108 is greater than the minimum value of the diameters of the second sub-coils 10442.

[0194] In this embodiment, Figure 5B the L1 in shows the maximum value of the diameter of the second sub-coil 10442, Figure 5B and Figure 5C the L2 in shows the diameter of the minimum circumscribed circle of the second coil 108,Figure 5C L3 therein shows the minimum diameter of the second sub-coil 10442.

[0195] The second sub-coil 10442 is a sub-coil arranged in the R part. In the direction from the bottom of the pot to the pot mouth 1026, the diameter of the second sub-coil 10442 increases, so that the second sub-coil 10442 can better fit the hemispherical transition area of the inner pot 102. Among them, the diameter of the largest circumscribed circle of the second coil 108 is less than or equal to the diameter of the second sub-coil 10442 with the largest diameter.

[0196] In the embodiment of the present application, by setting that the projected area of the bottom coil in the vertical direction is not greater than that of the coil with the largest middle diameter among the side coils, energy waste caused by the bottom coil exceeding the inner pot is prevented.

[0197] In some embodiments of the present application, optionally, the diameter of the smallest circumscribed circle of at least two second coils 108 is less than or equal to the diameter of the first sub-coil 10422.

[0198] In this embodiment, the diameter of the largest circumscribed circle of the second coil 108 is greater than or equal to the diameter of the second sub-coil 10442 with the smallest diameter.

[0199] For the spherical pot with an inwardly recessed bottom, limited by the processing accuracy, the distance between the first coil 104, specifically the second coil section 1044 and the R part of the side wall 1022 of the inner pot 102 is usually greater than the distance between the first coil section 1042 and the non-R part of the side wall 1022 of the inner pot 102. By setting that the diameter of the smallest circumscribed circle of the second coil 108 is greater than the smallest diameter of the second sub-coil 10442, the second coil 108 can cover the R part and perform supplementary heating on the R part.

[0200] In the embodiment of the present application, by setting that the bottom coil covers the R part area of the spherical inner pot 102 in the vertical direction, supplementary heating is performed on the inwardly recessed hemispherical R part area, so that the heat distribution of the inner pot 102 is more uniform and the cooking effect of the cooking device 100 is improved.

[0201] In some embodiments of the present application, optionally, Figures 13A to 18 shows a schematic structural diagram of the bracket assembly 110 of some embodiments of the present application, as Figure 13A , Figure 13B , Figure 14 , Figure 15 , Figure 16 , Figure 17 and Figure 18 shown, the cooking device 100 further includes: a bracket assembly 110, and the bracket assembly 110 includes an accommodation cavity 1106 for accommodating the inner pot 102.

[0202] In this embodiment, the cooking device 100 includes a bracket assembly 110. An accommodation cavity 1106 for placing the inner pot 102 is formed inside the bracket assembly 110. Exemplarily, when the inner pot 102 is placed at a preset position in the accommodation cavity 1106, the bracket assembly 110 forms a semi-wrapping state around the inner pot 102. At this time, the peripheral side wall 1022 of the bracket assembly 110 covers at least more than half of the area of the side wall 1022 of the inner pot 102.

[0203] Exemplarily, a winding portion for winding the first coil 104 and the second coil 108 may be provided on the bracket assembly 110, so as to realize the winding of the first coil 104 and the second coil 108.

[0204] By providing the bracket assembly 110 in the embodiment of the present application, the inner pot 102 can be stabilized, and at the same time, it is beneficial to the winding of the first coil 104 and the second coil 108, reducing the processing difficulty of the process.

[0205] In some embodiments of the present application, optionally, as Figure 13A , Figure 13B , Figure 14 , Figure 15 , Figure 16 , Figure 17 and Figure 18 shown, the bracket assembly 110 includes: a first bracket 1102, the first bracket 1102 includes a first winding portion 11022, and the first coil 104 is wound around the first winding portion 11022; a second bracket 1104, the second bracket is connected to the first bracket 1102, the second bracket 1104 includes a second winding portion 11041, and the second coil 108 is wound around the second winding portion 11041.

[0206] In this embodiment, the bracket assembly 110 includes a first bracket 1102 and a second bracket 1104. Among them, the first bracket 1102 is a bowl-shaped structure. An accommodation cavity 1106 is formed inside the first bracket 1102. The first bracket 1102 includes a first winding portion 11022. Exemplarily, the first winding portion 11022 is a multi-layer winding groove, and the multi-layer winding grooves are uniformly distributed in the height direction of the inner pot 102.

[0207] The second bracket 1104 is disposed at the bottom of the first bracket 1102 and is connected to the first bracket 1102. A second wire winding portion 11041 is provided on the second bracket 1104, and the second coil 108 is wound around the second wire winding portion 11041. Exemplarily, the second wire winding portion 11041 includes a winding shaft 11044, a wire routing groove, and a leaf-shaped fixing structure. Exemplarily, the second bracket 1104 can be connected to the bottom wall 1024 of the first bracket 1102 through a connecting member such as a bolt. Exemplarily, in some possible embodiments, the number of the second wire winding portions 11041 corresponds to the number of the second coils 108, that is, one second coil 108 is wound around each second wire winding portion 11041. Exemplarily, in some other possible embodiments, the number of the second wire winding portions 11041 is not less than the number of the second coils 108, that is, a plurality of second wire winding portions 11041 are preset at the bottom of the first bracket 1102, and several of the second wire winding portions 11041 are selected to wind the second coils 108 according to different models of the cooking device 100, so that different models of the cooking device 100 can share the same bracket assembly 110.

[0208] In this application, by providing the first bracket 1102 and the second bracket 1104, the first bracket 1102 includes a first wire winding portion 11022, and the second bracket 1104 includes a second wire winding portion 11041. The first wire winding portion 11022 and the second wire winding portion 11041 are respectively used for winding the first coil 104 and the second coil 108, which is beneficial to reducing the assembly difficulty during the production and assembly of the cooking device 100 and improving the production efficiency.

[0209] In some embodiments of this application, Figure 19 The structural schematic diagram of the second bracket 1104 in some embodiments of this application is shown. Figure 20 The wire winding schematic diagram of the second coil 108 according to some embodiments of this application is shown. As Figure 19 and Figure 20 shown, the second bracket 1104 includes: a body 11042, the body 11042 is provided with a winding shaft 11044, a wire threading hole 11045, and a wire fixing portion 11046; a wire pressing portion 11043, the wire pressing portion 11043 is connected to the winding shaft 11044 of the body 11042, and a second wire winding portion 11041 is formed between the wire pressing portion 11043 and the body 11042. The wire pressing portion 11043 is provided with heat dissipation holes 11047; wherein, at least two second coils 108 are connected in series, and the outgoing wire end of one second coil 108 passes from one side of the body 11042 through the wire threading hole 11045 to the other side of the body 11042, and is connected to the incoming wire end of another second coil 108 after passing through the wire fixing portion 11046.

[0210] In this embodiment, the second bracket 1104 includes a body 11042 and a wire pressing portion 11043. Among them, a winding shaft 11044 is provided on the body 11042. When winding the first coil 104, the wire is wound around the winding shaft 11044 as the rotation axis to form the second coil 108. A wire passing hole 11045 and a wire fixing portion 11046 are also provided on the body 11042. At least two second coils 108 are connected in series in sequence. After winding one second coil 108, the outgoing wire end of this second coil 108 passes through the wire passing hole 11045 on the body 11042, is transmitted from the second winding portion 11041 on one side of the body 11042 to the other side of the body 11042, and after being fixed by the wire fixing portion 11046, the wire walks to the next second bracket 1104 and winds the next second coil 108.

[0211] Exemplarily, at least two second coils 108 can be wound in sequence by a complete long wire.

[0212] Exemplarily, among two adjacent second coils 108, the incoming wire end of one second coil 108 is connected to the outgoing wire end of the other second coil 108 through a connector such as a connection terminal.

[0213] Heat dissipation holes 11047 are provided on the wire pressing portion 11043, and the basic area between the second coil 108 and the air is increased through the heat dissipation holes 11047 to improve the heat dissipation capacity.

[0214] In the embodiment of the present application, by providing the wire passing hole 11045 to pass the outgoing wire end of one second coil 108 to the back of the second body 11042 and fixing the wire connection between the two second coils 108 through the wire fixing portion 11046, the problem that the connection wire and the coil overlap and squeeze each other, resulting in wire skin damage, can be effectively avoided, preventing faults such as short circuits. At the same time, the stability of the connection wire during transportation can be effectively improved, reducing the possibility of wire disconnection due to transportation vibration, and improving the reliability of the cooking device 100.

[0215] In some embodiments of the present application, optionally, Figure 21 The structural schematic diagram of the cooking device according to some embodiments of the present application is shown. As Figure 21 shown, the cooking device 100 further includes: a base 112; a housing 114, the housing 114 is connected to the base 112, and the bracket assembly 110 is located inside the housing 114; the bracket assembly includes a mounting portion 1108, the setting position of the mounting portion 1108 corresponds to the position of the spacing portion 106, and the bracket assembly is connected to the base 112 or the housing 114 through the mounting portion 1108; a cover body 116, the cover body 116 is connected to the housing 114 in an openable and closable manner.

[0216] In this embodiment, the cooking device 100 includes a base 112, a housing 114, and a lid 116. The bracket assembly 110 is mounted on the base 112. Exemplarily, mounting posts are provided on the base 112, and, exemplarily, the number of the mounting posts is at least two. An installation portion 1108 is provided on the bracket assembly 110, and the position where the installation portion 1108 is provided corresponds to the spacer portion 106, that is, the installation portion 1108 utilizes the space vacated by the spacer portion 106. The bracket assembly 110 is connected to the housing 114 or the base 112 through the installation portion 1108.

[0217] Exemplarily, the bracket assembly 110 is connected to the housing 114 through the installation portion 1108.

[0218] Exemplarily, the bracket assembly 110 is connected to the base 112 through the installation portion 1108.

[0219] Exemplarily, the top of the installation portion 1108 includes a threaded hole, and the installation portion 1108 includes a through hole. During assembly, a bolt passes through the through hole of the installation portion 1108 and is screwed into the threaded hole of the mounting post, so as to fix the bracket assembly 110 on the base 112. Exemplarily, when the installation portion 1108 is connected and installed with the mounting post, a gap is left between the bracket assembly 110 and the body 11042 of the base 112, so as to prevent the bottom coil from contacting the base 112 and reserve a heat dissipation space for the bottom coil.

[0220] The housing is connected to the base, and an installation cavity is formed by enclosing between the housing and the base. The bracket assembly 110 is arranged in the installation cavity. The lid 116 is connected to the top of the housing in an openable and closable manner. When the lid 116 is in the open state, the opening of the accommodation cavity 1106 is exposed, and at this time, the user can take in and take out the inner pot 102. When the lid 116 is in the closed state, the opening of the accommodation cavity 1106 is covered by the lid 116. At this time, if the inner pot 102 is in the preset position in the accommodation cavity 1106, the inner pot 102 is also in a closed state.

[0221] In the embodiment of the present application, by providing the housing and the lid to form the exposed surface of the cooking device 100, the internal components of the cooking device 100 can be wrapped, thereby improving the reliability and aesthetics of the cooking device 100.

[0222] In the description of the present application, the term "a plurality of" means two or more. Unless otherwise clearly defined, the orientation or positional relationship indicated by terms such as "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application. Terms such as "connection", "installation", "fixation", etc. should all be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0223] In the description of the present application, the description of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the schematic expressions of the above terms do not necessarily refer to the same embodiment or instance. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0224] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A cooking device, characterized in that: include: an inner pot, the inner pot comprising a side wall; A first coil, the first coil is wound on the side wall, the first coil includes M sub-coils distributed along the height direction of the inner pot, the M sub-coils include at least two first sub-coils, and the average interval between two adjacent first sub-coils is D; the first coil also includes a spacing part, and the width of the spacing part in the height direction of the inner pot is H, H≥5D, wherein M is a positive integer.

2. The cooking device according to claim 1, characterized in that: At least N sub-coils among the M sub-coils are single-turn coils, N is a positive integer, and N / M≥2 / 5.

3. The cooking device according to claim 1, characterized in that: The surface area of ​​the side wall is S1, and the area of ​​the side wall covered by the first coil is S2, satisfying S2 / S1≥0.

48.

4. The cooking device according to any one of claims 1 to 3, characterized in that: The inner pot also includes a pot mouth and a bottom wall, the side wall includes a first wall segment and a second wall segment, the first end of the first wall segment forms the pot mouth, the second end of the first wall segment is connected to the first end of the second wall segment, the second segment of the second wall segment is connected to the bottom wall, and the inner diameter of the second wall segment decreases in the direction from the pot mouth to the bottom wall.

5. The cooking device according to claim 4, characterized in that: The first coil includes a first coil segment and a second coil segment, the first coil segment is wound around the first wall segment, and the second coil segment is wound around the second wall segment; The first coil segment includes all the first sub-coils, the second coil segment includes a plurality of second sub-coils, an average interval between two adjacent first sub-coils is D, an average interval between two adjacent second sub-coils is d, and d≥D.

6. The cooking device according to claim 5, characterized in that Also includes: The second coil is arranged toward the bottom wall. The number of the second coils is at least two, and at least two second coils are arranged at intervals along the circumferential direction of the bottom wall.

7. The cooking device according to claim 6, characterized in that In the direction from the bottom wall to the pot mouth, the diameters of the plurality of second sub-coils increase gradually; The diameter of the smallest circumscribed circle of at least two of the second coils is larger than the smallest value of the diameter of the second sub-coil.

8. The cooking device according to claim 7, characterized in that The diameter of the smallest circumscribed circle of at least two of the second coils is smaller than or equal to the diameter of the first sub-coil.

9. The cooking device according to claim 6, characterized in that: Also includes: A support assembly includes a receiving cavity therein, and the receiving cavity is used to receive the inner pot.

10. The cooking device according to claim 9, characterized in that The bracket assembly comprises: A first bracket, the first bracket comprising a first winding portion, the first coil being wound around the first winding portion; The second bracket is connected to the first bracket, the second bracket includes a second winding portion, and the second coil is wound around the second winding portion.

11. The cooking device according to claim 10, characterized in that The second bracket comprises: A main body, wherein the main body is provided with a winding shaft, a threading hole and a wire fixing portion; A wire pressing part, the wire pressing part is connected to the winding shaft of the body, the second winding part is formed between the wire pressing part and the body, and a heat dissipation hole is provided on the wire pressing part; Among them, at least two of the second coils are connected in series, and the wire outlet of one of the second coils passes through the wire threading hole from one side of the body to the other side of the body, and is connected to the wire inlet of another second coil after passing through the wire fixing part.

12. The cooking device according to claim 11, characterized in that Cooking equipment also includes: Base; A shell, the shell is connected to the base, and the bracket assembly is located in the shell; The bracket assembly includes a mounting portion, the mounting portion is arranged at a position corresponding to the position of the spacing portion, and the bracket assembly is connected to the base or the housing through the mounting portion; The cover body is connected to the shell body in an openable and closable manner.

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