Electric heating assembly and electric heating appliance
By designing a multi-layered cascaded electric heating component, and utilizing a combination of N heating rings and heating wires, the problems of fixed power and high material cost in existing mica heating devices are solved, achieving efficient heat transfer in thin, flat-plate heating.
Patent Information
- Application Number
- CN202422385243.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-29
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2034-09-29
AI Technical Summary
Existing mica heating devices have a fixed power output for a fixed area, which cannot be increased, resulting in increased thickness, larger space occupation, higher material costs, and are not conducive to heat transfer and utilization.
The electric heating components are combined in a multi-layer cascade manner, with N heating rings nested radially and heating wires evenly wound around the circumference. They are connected in series or in parallel as needed, and designed into a thin, flat single-sided or double-sided heating structure.
It achieves a higher power and easier-to-control heating effect within a fixed area, reduces material costs, improves heat transfer efficiency, and is suitable for thin, flat heating scenarios.
Smart Images
Figure CN223758416U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field technology of electric heating, especially an electric heating assembly and an electric heating appliance. BACKGROUND
[0002] Mica heating device is a kind of heating equipment widely used in household appliances. The mica heating device usually includes a metal outer frame, a mica heating plate arranged in the metal outer frame, and a heating wire wound on the mica heating plate, and the mica heating plate has an insulating layer on both sides, and the heating wire is wound on both sides of the mica plate.
[0003] For example, CN 115022992 A discloses a heating disc, which includes an outer shell and a temperature controller, the inner side wall of the outer shell is clamped with the temperature controller, the temperature controller includes a connecting shell, a connecting ring, a temperature control jump, a pressing sheet and a fixing ring, the front surface of the outer shell is provided with a first insulating layer, the front surface of the first insulating layer is provided with a heating layer, the front surface of the heating layer is provided with an insulating layer, the front surface of the insulating layer is provided with a heat preservation layer, the front surface of the heat preservation layer is provided with a second insulating layer, the front surface of the second insulating layer is provided with a bottom plate, and the circumference of the outer shell is inwardly rolled and wrapped around the circumference of the bottom plate. The heating layer and the heat preservation layer each include a circular mica sheet and a heating wire, and the heating wire is uniformly wound on the surface of the mica sheet. After the device is powered on, the heating layer first heats the food inside, and when the food is heated to the desired temperature and the temperature inside the device reaches the preset threshold, the temperature control jump is triggered to disconnect the power supply. At this time, the heat preservation layer is used for heat preservation to ensure the temperature of the heated food.
[0004] It can be seen that two mica heating plates (a mica sheet and a heating wire wound on the mica sheet as one mica heating plate) are needed to heat and preserve, which results in a relatively thick and large space occupation, and the total material cost for heating and preserving is relatively high. Since the outer diameter of the mica sheet is mainly determined by the size of the outer shell, and the inner diameter of the mica sheet is determined by the size of the temperature controller, the winding amount of the heating wire is fixed due to the limited area of the mica sheet, that is, the power of a single mica heating plate is fixed and cannot be increased. If the power needs to be increased, multiple mica heating plates can be stacked in the thickness direction of the mica sheet. This results in a thicker and larger space occupation, which undoubtedly increases the total material cost and is not conducive to heat transfer and effective utilization.
[0005] Therefore, it is necessary to study a new technical solution to solve the above problems. UTILITY MODEL CONTENT
[0006] Therefore, the utility model discloses to the existing technology in view of the lack, and its main purpose is to provide a kind of electric heating assembly and electric heating appliance, it is combined by multilayer cascade mode to the electric heating assembly of greater power, different power is easy to control, especially suitable for the scene of thin flat single-sided or double-sided heating.
[0007] To achieve the above object, the utility model adopts the following technical scheme:
[0008] An electric heating assembly, comprising N heating annular rings, N is a natural number more than 2, N heating annular rings are sequentially placed in radial direction and present flat plate shape;The heating annular ring includes annular plate and heating wire that is continuously wound along the circumference of the annular ring, and the inner diameter of the annular plate is 0.3-0.7 times of the outer diameter.
[0009] As a preferred scheme, the inner diameter of the annular plate is 0.5 times of the outer diameter.
[0010] As a preferred scheme, the first heating annular ring to the Nth heating annular ring is sequentially placed from outside to inside;The outer diameter of the annular plate of the Nth heating annular ring is equal to the inner diameter of the annular plate of the N-1th heating annular ring.
[0011] As a preferred scheme, the heating wire is uniformly spaced and wrapped around the circumference of the annular plate.
[0012] As a preferred scheme, N heating annular rings are connected in series or parallel;Or, N heating annular rings are respectively independently connected to the control end to be controlled heating respectively.
[0013] As a preferred scheme, a circular heating plate is arranged in the inner hole of the Nth heating annular ring, and the outer diameter of the circular heating plate is less than or equal to the inner diameter of the Nth heating annular ring.
[0014] As a preferred scheme, N heating annular rings and circular heating plate are connected in series or parallel;Or, N heating annular rings and circular heating plate are respectively independently connected to the control end to be controlled heating respectively.
[0015] As a preferred scheme, N heating annular rings all adopt single-sided or double-sided continuous winding heating wire;
[0016] Or, in N heating annular rings, more than one heating annular ring adopts single-sided continuous winding heating wire, and the remaining heating annular ring adopts double-sided continuous winding heating wire.
[0017] As a preferred scheme, the periphery of the first heating annular ring is further sequentially placed with M outer expansion heating annular rings in radial direction, and M is a natural number more than 1.
[0018] An electric heating appliance comprises a heating unit, the heating unit comprising an electric heating assembly, the electric heating assembly being the electric heating assembly of any one of the preceding items.
[0019] The utility model discloses a kind of electric heating appliances, comprising a heating unit, the heating unit comprising an electric heating assembly, the electric heating assembly is the electric heating assembly of any one of the preceding items.
[0020] To more clearly set forth the structural features and efficacy of the utility model, the utility model is described in detail below in conjunction with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS
[0021] Figure 1 It is the step diagram of the design method of a kind of electric heating assembly of the embodiment of the utility model;
[0022] Figure 2 It is the structural state change diagram of the ring plate, heating ring after winding wire, N heating rings of the embodiment of the utility model are sequentially placed as an electric heating assembly;
[0023] Figure 3 It is the state diagram of two heating rings sequentially placed as an electric heating assembly in the embodiment of the utility model (wherein, ring plate is the mica plate without gap in inner and outer ring side, double-sided continuous winding heating wire);
[0024] Figure 4 It is the state diagram of three heating rings sequentially placed as an electric heating assembly in the embodiment of the utility model (wherein, ring plate is the mica plate without gap in inner and outer ring side, double-sided continuous winding heating wire);
[0025] Figure 5 It is the exploded view of four heating rings sequentially placed as an electric heating assembly in the embodiment of the utility model (wherein, ring plate is the mica plate without gap in inner and outer ring side, double-sided continuous winding heating wire);
[0026] Figure 6 It is the exploded view of five heating rings sequentially placed as an electric heating assembly in the embodiment of the utility model (wherein, ring plate is the mica plate without gap in inner and outer ring side, double-sided continuous winding heating wire).
[0027] Figure 7 is the state diagram of two heating rings of the embodiment of the utility model successively sleeved as an electric heating assembly (wherein, the ring plate is mica plate with notches on the inner and outer ring sides, and the heating wire is continuously wound on both sides);
[0028] Figure 8 is the state diagram of three heating rings of the embodiment of the utility model successively sleeved as an electric heating assembly (wherein, the ring plate is mica plate with notches on the inner and outer ring sides, and the heating wire is continuously wound on both sides);
[0029] Figure 9 is the exploded view of four heating rings of the embodiment of the utility model successively sleeved as an electric heating assembly (wherein, the ring plate is mica plate with notches on the inner and outer ring sides, and the heating wire is continuously wound on both sides);
[0030] Figure 10 is the exploded view of five heating rings of the embodiment of the utility model successively sleeved as an electric heating assembly (wherein, the ring plate is mica plate with notches on the inner and outer ring sides, and the heating wire is continuously wound on both sides);
[0031] Figure 11 is the state diagram of two heating rings of the embodiment of the utility model successively sleeved as an electric heating assembly (wherein, the ring plate is mica plate with notches on the inner and outer ring sides, and the heating wire is continuously wound on one side);
[0032] Figure 12 is the state diagram of three heating rings of the embodiment of the utility model successively sleeved as an electric heating assembly (wherein, the ring plate is mica plate with notches on the inner and outer ring sides, and the heating wire is continuously wound on one side);
[0033] Figure 13 is the state diagram of three heating rings and one circular heating plate of the embodiment of the utility model successively sleeved as an electric heating assembly;
[0034] Figure 14 is the state diagram of two heating rings and one circular heating plate of the embodiment of the utility model successively sleeved as an electric heating assembly;
[0035] Figure 15 is the state diagram of two heating rings and one circular heating plate of the embodiment of the utility model successively sleeved as an electric heating assembly (the circular heating plate is circular mica plate with heating wire wound thereon);
[0036] Figure 16 is the schematic diagram of the outer and inner diameters of each ring plate, the winding spacing, and the electrically connected end points of the heating wire, taking two heating rings as an example.
[0037] The first heating ring 10, the first ring plate 11, the first heating wire 12, the second heating ring 20, the second ring plate 21, the second heating wire 22, the third heating ring 30, the third ring plate 31, the third heating wire 32, the fourth heating ring 40, the fifth heating ring 50, the circular heating plate 60, the circular mica plate 61, the heating wire 62, the notch 1, and the hanging tooth 2. DETAILED DESCRIPTION
[0038] Please refer to Figures 1 to 16 The specific structure of various embodiments of the utility model is shown.
[0039] In the description of the utility model, it needs to be explained that the terms "upper", "lower", "left", "right" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.
[0040] An electric heating assembly comprises N heating rings, N is a natural number greater than or equal to 2, and the N heating rings are sequentially sleeved in a radial direction to form a flat plate; the heating ring comprises a ring plate and a heating wire continuously wound along the circumference of the ring; the heating wire is uniformly spaced along the circumference and covers the ring plate; the inner diameter of the ring plate is 0.3-0.7 times the outer diameter, and the optimal value is 0.5 times; the total length of the heating wire can reach the maximum value, and the power is the maximum; the first heating ring to the Nth heating ring are sequentially sleeved from the outside to the inside; the outer diameter of the ring plate of the Nth heating ring is equal to the inner diameter of the ring plate of the N-1th heating ring.
[0041] As Figure 1 and Figure 2 As shown in the drawings, when designing the electric heating assembly, based on the given outer diameter 2R, the outer radius is defined as R, and the winding spacing n is generally given; here, taking the inner diameter of the ring plate as 0.5 times the outer diameter as an example, the following steps are included:
[0042] Step 1, design N heating rings, N is a natural number greater than or equal to 2; each heating ring comprises a ring plate (the circular plate is usually made of insulating material, for example, a circular mica plate) and a heating wire continuously wound on one side or both sides of the ring plate; the heating wire is uniformly spaced along the circumference until it covers the entire ring plate;
[0043] The first heating ring 10 is designed; first, the first circular plate 11 is designed (which is the largest ring within the given outer diameter), the given outer diameter is taken as the outer diameter of the first circular plate 11, the outer diameter is 2R, and half of the given outer diameter is taken as the inner diameter r of the first circular plate 11 (that is, r = R), then the first heating wire 12 is continuously wound on the first circular plate 11 along the circumferential direction of the ring, the first heating wire 12 alternately passes through the inner ring side and the outer ring side of the first circular plate 11, and the spacing between adjacent winding segments on the same side of the first heating wire 12 is the winding spacing, which is usually given as required;
[0044] The second heating ring 20 is designed; first, the second circular plate 21 is designed, the inner diameter r of the first circular plate 11 is taken as the outer diameter of the second circular plate 21 (that is, R), and half of the outer diameter of the second circular plate 21 is taken as the inner diameter of the second circular plate 21 (that is, 0.5R), then the second heating wire 22 is continuously wound on the second circular plate 21 along the circumferential direction of the ring, the second heating wire 22 alternately passes through the inner ring side and the outer ring side of the second circular plate 21, and the spacing between adjacent winding segments on the same side of the second heating wire 22 is the winding spacing, which is usually given as required;
[0045] In step 1, when each circular plate is made, it is usually cut from a plate (for example, a mica plate), and after cutting, the outer diameter of the second circular plate may be slightly smaller than the inner diameter of the first circular plate, which is only a small size deviation caused by processing, and it should still be understood that the outer diameter of the second circular plate is equal to the inner diameter of the first circular plate.
[0046] Step 2, sequentially place N heating rings to form a complete electric heating assembly, wherein the first heating ring 10 is placed on the outer periphery of the second heating ring 20.
[0047] Since each heating ring has the maximum power, the electric heating assembly thus placed is in a series state, and compared with a single heating ring of the same area, the total length of the heating wire wound thereon is the longest and the power is the largest, thereby obtaining a multi-level cascading electric heating assembly with the maximum power.
[0048] In combination Figure 16 When the outer diameter and the winding spacing n are given, that is, the circular radius is R, a point X is randomly taken on the radius R, OX is taken as the length r, and a circle is drawn with O as the center and r as the radius; the winding spacing n = the diameter of the heating wire + the gap between adjacent heating wires, and the heating wire is continuously wound on the single side of the ring with a ring width of R-r or on the double sides, it can be known that the number of winding turns of the heating wire on the ring is 2πr / n;
[0049] When the heating wire is continuously wound on the single side of the ring, the total length of the winding Z1=(R-r)2πr / n, since R, π, n are known values, the unknown number is r, which constitutes a quadratic function of one variable, for the general formula of the quadratic function of one variable y=ax2+bx+c, when a<0, the parabola opens downward, the function y has a maximum value (4ac-b2) / 4a, the vertex coordinates [-b / 2a, (4ac-b2) / 4a], it is found that: when r=R / 2, Z1 has a maximum value. Therefore, when the inner radius of the ring is half of the outer radius, the total length of the winding Z1 of the heating wire continuously wound on the single side of the ring has a maximum value;
[0050] When the heating wire is continuously wound on the double side of the ring, the total length of the winding Z2=2(R-r)2πr / n, since R, π, n are known values, the unknown number is r, which constitutes a quadratic function of one variable, for the general formula of the quadratic function of one variable y=ax2+bx+c, when a<0, the parabola opens downward, the function y has a maximum value (4ac-b2) / 4a, the vertex coordinates [-b / 2a, (4ac-b2) / 4a], it is found that: when r=R / 2, Z1 has a maximum value. Therefore, when the inner radius of the ring is half of the outer radius, the total length of the winding Z2 of the heating wire continuously wound on the single side of the ring has a maximum value;
[0051] Therefore, the first heating ring 10 with the maximum power can be obtained.
[0052] The second heating ring 20 is continuously designed, and a point F is taken on the remaining circle with radius r. A circle is drawn with the point O as the center and the length of the line segment OF as the radius. Similarly, when OF=r / 2, the total length of the winding of the heating wire of the second heating ring 20 has a maximum value.
[0053] In this way, for the electric heating assembly composed of N heating rings, the total length of the winding of the heating wire of the single heating ring has reached the maximum value, that is, the power is the maximum, and the power of the electric heating assembly can also be maximized.
[0054] As Figures 4-6 , and Figures 8-10As shown, the electric heating assembly is obtained by sequentially sleeving three or more heating rings. When N is greater than 2, the Xth heating ring is designed: first, the Xth ring plate is designed, X is a natural number greater than 2, the inner diameter of the (X-1)th ring plate is taken as the outer diameter of the Xth ring plate, half of the outer diameter of the Xth ring plate is taken as the inner diameter of the Xth ring plate, then the Xth heating wire is continuously wound on the Xth ring plate along the circumferential direction of the ring, the Xth heating wire alternately passes through the inner ring side and the outer ring side of the Xth ring plate, and the spacing between adjacent winding segments on the same side of the Xth heating wire is the winding spacing, which is usually given as required. Taking the third heating ring 30 as an example: first, the third ring plate 31 is designed, the inner diameter of the second ring plate 21 is taken as the outer diameter of the third ring plate 31 (i.e. 0.5R), the inner diameter of the third ring plate 31 is equal to half of the outer diameter of the third ring plate 31 (i.e. 0.25R), in some cases, if the inner diameter of the third ring plate 31 is designed to be slightly larger than 0.25R or slightly smaller than 0.25R, it is also acceptable; then the third heating wire 32 is continuously wound on the third ring plate 31 along the circumferential direction of the ring, the third heating wire 32 alternately passes through the inner ring side and the outer ring side of the third ring plate 31, and the spacing between adjacent winding segments on the same side of the third heating wire 32 is the winding spacing, which is usually given as required.
[0055] As shown in Figures 13-15 As shown, the inner hole of the Nth heating ring is provided with a circular heating plate 60, and the outer diameter of the circular heating plate 60 is less than or equal to the inner diameter of the Nth heating ring. By not continuing to select a ring-shaped electric heating plate for the innermost layer, but selecting a circular electric heating plate, taking an electric frying pan as an example, the circular heating plate 60 of the innermost layer has the smallest area and a relatively small power, which is used to play a heat preservation effect. In actual design, the circular heating plate 60 can directly adopt a metal heating plate, or a circular heating plate 60 formed by winding a heating wire 62 on a circular mica plate 61.
[0056] Since the electric heating assembly is obtained by sequentially sleeving N heating rings, in this way, a multi-level cascade can be used to combine an electric heating assembly with the largest power, and different powers can be easily controlled according to the functional requirements. When electrically connecting and controlling each heating ring, the N heating rings can be arranged in series or parallel, or each of the N heating rings is independently connected to a control end to be controlled and heated respectively. Taking Figure 16For example, if the A and B terminals are respectively connected to the input voltage, and the B and C terminals are respectively connected to the A and B terminals, it is equivalent to two heating filaments of the heating circular ring being connected in parallel; if the B and C terminals are short-circuited, and the A and D terminals are respectively connected to the input voltage, the two heating filaments of the heating circular ring are connected in series. Similarly, N heating circular rings and the circular heating plate can be connected in series or in parallel; or, the N heating circular rings and the circular heating plate are respectively and independently connected to the control end to be controlled to heat. In the series connection mode, the power demand from small to large can be combined, and the power size is adjusted by adjusting the working state of several heating units (referring to the heating circular ring or the circular heating plate). In the parallel connection mode, each heating unit can be controlled respectively. In this way, the heating units in the multi-level cascade can be combined in series or in parallel to meet different functional requirements.
[0057] In actual design, all the N heating circular rings adopt single-sided or double-sided continuous winding of the heating filament; the single-sided winding electric heating assembly is suitable for the scene of single-sided heating, can concentrate on single-sided heating, and reduces the loss of heat energy. If the winding interval n of the heating filament is fixed, the length of the heating filament of the mica plate of the same shape and size is half of that of the double-sided winding, and the power is also reduced by half; the double-sided winding electric heating assembly is suitable for the scene of double-sided heating, can heat on both sides at the same time, and the power is doubled compared with the single-sided winding electric heating assembly; or, in the N heating circular rings, one or more heating circular rings adopt single-sided continuous winding of the heating filament, and the remaining heating circular rings adopt double-sided continuous winding of the heating filament, to meet the differentiated and diversified application scene of double-sided heating capacity. In addition, the heating filaments of the N heating circular rings can be the same or different, for example, the heating filament materials are different, the diameters are different, and the winding intervals are different. The circular ring plate is generally a mica plate, and of course, other materials can be used to replace or partially replace the mica plate. The main function of the mica plate is to serve as a winding carrier, facilitate winding, and consider the heat resistance.
[0058] Specifically, as shown in Figures 3 to 12 , it shows various implementation scenarios:
[0059] As shown in Figure 3 , two heating circular rings (i.e., the first heating circular ring 10 and the second heating circular ring 20) are sequentially sleeved to form an electric heating assembly, and the circular ring plate is a mica plate without notches on the inner and outer ring sides, and the heating filament is double-sided continuous winding. Since the heating filament is wrapped on the inner and outer ring sides of the circular ring plate, it will occupy a small amount of space, so the inner and outer diameters of the cut circular ring plate need to consider the size deviation and have a margin. For the mica plate without notches on the inner and outer ring sides, it is usually only suitable for double-sided continuous winding of the heating filament. If single-sided continuous winding of the heating filament is needed, a plurality of hanging points can be arranged on the inner and outer ring sides of the single side of the mica plate to provide hanging points on the inner and outer ring sides for the heating filament during winding, so that the heating filament can be sequentially wound on the single side.
[0060] As shown in Figures 4-6 , it adopts 3-5 heating rings to be sequentially sleeved as an electric heating assembly, and the ring plate is a mica plate without notches on the inner and outer ring sides, and the heating wire is continuously wound on both sides. Figure 4 The electric heating assembly in includes the first heating ring 10, the second heating ring 20, and the third heating ring 30. Figure 5 The electric heating assembly in includes the first heating ring 10, the second heating ring 20, the third heating ring 30, and the fourth heating ring 40. Figure 6 The electric heating assembly in includes the first heating ring 10, the second heating ring 20, the third heating ring 30, the fourth heating ring 40, and the fifth heating ring 50.
[0061] As shown in Figure 7 , it adopts two heating rings (i.e., the first heating ring 10 and the second heating ring 20) to be sequentially sleeved as an electric heating assembly, and the ring plate is a mica plate with notches on the inner and outer ring sides, and the heating wire is continuously wound on both sides.
[0062] As shown in Figures 8-10 , it adopts 3-5 heating rings to be sequentially sleeved as an electric heating assembly, and the ring plate is a mica plate with notches 1 on the inner and outer ring sides, and the heating wire is continuously wound on both sides. Figure 8 The electric heating assembly in includes the first heating ring 10, the second heating ring 20, and the third heating ring 30. Figure 9 The electric heating assembly in includes the first heating ring 10, the second heating ring 20, the third heating ring 30, and the fourth heating ring 40. Figure 10 The electric heating assembly in includes the first heating ring 10, the second heating ring 20, the third heating ring 30, the fourth heating ring 40, and the fifth heating ring 50.
[0063] As shown in Figures 11-12 , it adopts 2-3 heating rings to be sequentially sleeved as an electric heating assembly. Figure 11 The electric heating assembly in includes the first heating ring 10 and the second heating ring 20. Figure 12The electric heating assembly in the electric heating appliance comprises a first heating ring 10, a second heating ring 20, and a third heating ring 30. Each ring plate is made of a mica plate with notches 1 on the inner and outer ring sides, and a heating wire is continuously wound on one side of the mica plate. There are hanging teeth 2 between every two adjacent notches 1 on the inner and outer ring sides. When the heating wire is wound, the heating wire is wound from one side of the mica plate through one notch 1 to the other side of the hanging teeth 2, and then returns to one side of the mica plate from the adjacent notch 1. Similarly, due to the arrangement of the notches 1, the heating wire will not protrude to occupy additional area outside the ring plate.
[0064] If it is necessary to increase the area of the heating plate, M outer expanded heating rings can be further provided, where M is a natural number greater than or equal to 1. The first outer expanded heating ring is designed as follows: first, the (N+1)th ring plate is designed, taking the outer diameter of the first ring plate 11 as the inner diameter of the (N+1)th ring plate, and the outer diameter of the (N+1)th ring plate is equal to twice the inner diameter of the (N+1)th ring plate. Then, the (N+1)th heating wire is continuously wound on the (N+1)th ring plate along the circumferential direction of the ring. The (N+1)th heating wire alternately passes through the inner ring side and the outer ring side of the (N+1)th ring plate. The spacing between adjacent winding segments on the same side of the (N+1)th heating wire is the winding spacing, which is usually given as required. When M is a natural number greater than or equal to 2, the Xth outer expanded heating ring is designed as follows: first, the (N+X)th ring plate is designed, where X is a natural number greater than or equal to 2. The outer diameter of the (N+X-1)th ring plate is taken as the inner diameter of the (N+X)th ring plate, and the outer diameter of the (N+X)th ring plate is equal to twice the inner diameter of the (N+X)th ring plate. Then, the (N+X)th heating wire is continuously wound on the (N+X)th ring plate along the circumferential direction of the ring. The (N+X)th heating wire alternately passes through the inner ring side and the outer ring side of the (N+X)th ring plate. The spacing between adjacent winding segments on the same side of the (N+X)th heating wire is the winding spacing, which is usually given as required. In this way, one layer after another, an electric heating assembly with an area that can be customized according to the outer diameter can be obtained.
[0065] The above description of various embodiments of the corresponding ring plate and heating wire winding method is not a limitation on the combination of technical features of the specific implementation scenarios. The technical features of different embodiments can also be replaced or slightly modified as required to combine more other embodiments that meet actual needs.
[0066] Furthermore, an electric heating appliance is provided, which comprises a heating unit, and the heating unit comprises an electric heating assembly. Typically, a metal plate (such as an aluminum plate or an aluminum alloy plate with good heat conduction performance) is provided on one side or both sides of the electric heating assembly to serve as a heat conductor and heat equalizer. The electric heating assembly is any one of the electric heating assemblies described above. The electric heating appliance can be any one of an electric rice cooker, an electric chafing dish, a frying and baking device, an electric frying pan, a warmer, an electric water heater, and an electric kettle.
[0067] Some electric heating appliances, its heating unit (also known as heating disc) need to reserve the center hole, for installation temperature control switch, for example, some electric rice cooker heating disc center installed temperature control switch, when the inner pot, the inner pot bottom surface and heating disc contact and extrude temperature control switch, form trigger, suitable for a plurality of heating ring in turn set as a complete electric heating assembly. And some electric heating appliances, it does not need to reserve the center hole, then can be applied to a plurality of heating ring in turn set as a complete electric heating assembly, also can be applied to the Nth heating ring hole is also provided with a circular heating plate electric heating assembly.
[0068] The design emphasis of the utility model lies in, it mainly is according to area size (given outer diameter), through design multiple can be in turn set N heating ring, adopt multi-layer cascade mode combination power greater electric heating assembly, and can according to the demand of function, carry out series or parallel combination connection, easy to control different power, especially suitable for thin flat single side or double side heating scene, effectively solve the problem in traditional technology under the fixed area only through along the thickness direction stack multiple electric heating plate (for example mica heating plate) lead to thickness thicker, take up more space, material cost is higher, not conducive to heat transfer and effective utilization etc.
[0069] The above is only the preferred embodiment of the utility model, and does not limit the technical scope of the utility model, so any slight modification, equivalent change and modification made according to the technical essence of the utility model to the above embodiment still belong to the scope of the technical scheme of the utility model.
Claims
1. An electric heating assembly, characterized by: The heating unit comprises N heating rings, N being a natural number greater than or equal to 2, the N heating rings being sequentially arranged in a radial direction in a flat plate shape; each of the heating rings comprises a ring plate and a heating wire continuously wound along a circumferential direction of the ring plate, and an inner diameter of each of the ring plates is 0.5 times of an outer diameter of the ring plate; The first heating ring to the Nth heating ring are sequentially arranged from an outer ring side to an inner ring side; an inner diameter of the heating ring on the outer ring side is equal to an outer diameter of the heating ring on the inner ring side adjacent to the heating ring on the outer ring side; A circular heating plate is arranged in a hole of the Nth heating ring, and an outer diameter of the circular heating plate is less than or equal to an inner diameter of the Nth heating ring; the circular heating plate is a metal heating plate; The N heating rings and the circular heating plate are connected in series or in parallel; or, the N heating rings and the circular heating plate are respectively and independently connected to a control end to be controlled to heat. The ring plates of the N heating rings are all mica plates with uniformly distributed notches on inner and outer ring sides, the notches being used for the corresponding heating wires to pass through to be wound on another surface of the mica plate, and the heating wires are hidden in a region between the inner ring side and the outer ring side of the corresponding ring plate to realize double-sided continuous winding of the heating wires.
2. An electrical heating assembly according to claim 1, characterised in that: The heating wires are uniformly spaced and distributed on the ring plates along the circumferential direction.
3. An electric heating appliance comprising a heating unit, characterized in that: The heating unit comprises an electric heating assembly, and the electric heating assembly is the electric heating assembly according to any one of claims 1 to 2.