CN205195999U - Coil plate and induction cooker - Google Patents

Abstract

The utility model provides a coil panel and electromagnetism stove. The utility model provides a coil panel, including plate rail (1) and coil (2), coil (2) are around establishing on plate rail (1), plate rail (1) upper surface is the cambered surface, coil (2) include at least two coil rings that encircle the setting from inside to outside in proper order, the innermost coil ring (21) of coil (2) and with form annular gap area (3) between the adjacent inferior inboard coil ring (22) of innermost coil ring (21), the external diameter less than or equal to 120mm of annular gap area (3), just the internal diameter more than or equal to 40mm of annular gap area (3). The utility model discloses can realize the even heating to the pan bottom.

Description

Coil plate and induction cooker

technical field

The utility model relates to the field of household appliances, in particular to a coil disk and an electromagnetic cooker.

Background technique

An induction cooker is a common household appliance used for cooking and heating. When the induction cooker is working, the coil disk inside itself generates an eddy current through electromagnetic induction, thereby heating the pan set on the induction cooker.

At present, because the bottom of the commonly used pot is arc-shaped, when the coils on the surface of the coil plate are flat, only a part of the coils heats the bottom of the pot in a small area, while the other part of the coil is far away from the pot. The magnetic field lines sensed by the tool are too few to heat normally, which causes uneven heating. Simultaneously, the magnetic lines of force leaked between the bottom surface of the pot and the coil pan will also pollute the surrounding environment. In order to avoid the phenomenon of uneven heating. The Chinese utility model patent with the application number 201220249157.8 proposes a coil plate for an induction cooker, including a bracket, a magnetic strip and its safety. The bracket includes a number of support frames distributed in the radial direction. In the clamping groove, the shape formed by the support frame is concave, so that the distance between the coil and the bottom of the pot can be kept consistent, and uneven heating can be reduced.

However, in the prior art, the distribution of the magnetic force lines generated by the coils on the support frame is not uniform. Where the coils generate magnetic force lines denser, the electromagnetic heating generates more heat, while where the magnetic force lines are relatively sparse, the heat generated is relatively small. Less, so there is still a phenomenon of uneven heating.

Utility model content

In order to solve at least one of the problems mentioned in the background technology, the utility model provides a coil plate and an induction cooker, which can realize uniform heating of the bottom of the pot, and the coil is not easily damaged.

In order to achieve the above object, on the one hand, the utility model provides a coil disk, which includes a disk frame and a coil. The coil is wound on the disk frame. The upper surface of the disk frame is an arc surface. Surrounding the set coil ring, an annular gap zone is formed between the innermost coil ring of the coil and the second inner coil ring adjacent to the innermost coil ring, the outer diameter of the annular gap zone is less than or equal to 120mm, and the annular gap zone The inner diameter is greater than or equal to 40mm. Because when the coils in this range generate an alternating magnetic field, the cutting effect of the magnetic field lines is the most obvious, and the heating effect on magnetically conductive objects such as pans is also the largest. The area where the two coil rings are disconnected is kept within this range to avoid too dense magnetic force lines and ensure the uniformity of heating.

Optionally, the distance between two adjacent coil loops is between 8-20mm. This can ensure that there is a gap of 2 mm between each coil ring and the magnetic strip, and at the same time, because the distance between two adjacent coil rings does not exceed 20 mm, the impact on the energy consumption of the coil disk is also small.

Optionally, the outer diameter of the annular gap is less than or equal to 120 mm, and the inner diameter of the annular gap is greater than or equal to 40 mm. Because the magnetic lines of force in the area within the range of φ40-φ120mm of the coil disk are relatively dense, the area where the two coil rings closest to the center of the coil disk are disconnected should also be kept within this range to ensure uniformity during heating.

Optionally, the outer diameter of the annular gap zone is less than or equal to 90mm, and the inner diameter of the annular gap zone is greater than or equal to 70mm. Because the coil disk is located within the range of φ70-φ90mm, the magnetic field lines are densest, so the area where the two coil rings closest to the center of the coil disk are disconnected should preferably be located in this range, which can avoid the occurrence of uneven magnetic force lines to the greatest extent.

Optionally, the height difference between the inner edge of the coil and the outer edge of the coil is between 5-30mm. In this way, the curvature of the coil can be kept as consistent as possible with the shape of the bottom surface of the pot, which can not only make the distance between the coil and the bottom surface of the pot uniform, so as to achieve a better uniform heating effect, but also prevent the leakage of magnetic force lines around the bottom surface of the pot , to avoid environmental pollution.

Optionally, holes for setting magnetic strips are arranged on the disk frame; the coil disk also includes magnetic strips, which are arranged under the coils and pass through the holes. The magnetic strip can change the magnetic field direction of the coil to reduce the leakage of the magnetic field of the coil, so that the magnetic field energy of the coil disk can be concentrated for heating, and the energy utilization efficiency of the coil disk can be improved.

Optionally, the coil and the frame are connected by an adhesive.

Optionally, the disk frame has cooling holes. This can enhance the heat dissipation of the entire coil disk.

On the other hand, the utility model also provides an induction cooker, which includes a heating panel, a casing, and the above-mentioned coil disk. The heating panel of the induction cooker is arranged on the top of the casing, and the coil disk is arranged inside the casing and under the heating panel. The coil pan can evenly heat the pans placed on the heating panel, and the coil pan has a long service life and is not easily damaged.

The structure of the utility model as well as its other objectives and beneficial effects will be more clearly understood through the description of the preferred embodiments in conjunction with the accompanying drawings.

Description of drawings

Fig. 1 is a schematic cross-sectional view of a coil disk provided in Embodiment 1 of the present invention;

Fig. 2 is a schematic structural view of the coil disk provided by Embodiment 1 of the present invention.

Explanation of reference signs:

Disk frame—1; coil—2; annular gap—3; magnetic strip—4;

Hole slot—11; innermost coil ring—21, second inner coil ring—22.

detailed description

Embodiment one

The coil disk is used in the induction cooker, which can generate alternating magnetic fields under the action of alternating current, thereby cutting the magnetic force lines on the magnetic objects such as pots within the magnetic field range, thereby heating the internal molecules of the magnetic objects and making the pots Wait for the temperature of the magnetic conductive object to rise to realize the electromagnetic heating effect. Fig. 1 is a schematic cross-sectional view of a coil disk provided by Embodiment 1 of the present invention. Fig. 2 is a schematic structural view of the coil disk provided by Embodiment 1 of the present invention. As shown in Figures 1 and 2, the coil disk provided in this embodiment includes a disk frame 1 and a coil 2, the coil 2 is wound on the disk frame 1, and the upper surface of the disk frame 1 is an arc surface, and the coil 2 includes at least two Two coil rings are arranged sequentially from the inside to the outside, an annular gap 3 is formed between the innermost coil ring 21 of the coil 2 and the second inner coil ring 22 adjacent to the innermost coil ring 21, and the outer portion of the annular gap 3 The diameter is less than or equal to 120mm, and the inner diameter of the annular gap zone 3 is greater than or equal to 40mm.

Since the upper surface of the frame 1 is an arc, when the coil 2 is wound on the frame 1, it will also form an arc. The shape of the curved surface usually matches the shape of the arc-shaped bottom surface of the pot and the distribution of the magnetic force lines, so that when the pot is placed on the coil plate, the shape of the bottom surface of the pot is similar to or consistent with the surface of the coil 2, so that the coil 2 and the surface of the coil 2 The distance between the bases of the pans is even and consistent. Specifically, the coil 2 and the frame 1 may be connected by an adhesive such as epoxy resin. The disk frame 1 may be provided with heat dissipation holes and the like to ensure heat dissipation of the coils.

Wherein, the coil 2 is formed by dense winding, that is, it is tightly wound on the frame 1 by adopting a dense winding process. When the coil 2 is wound, it is wound one by one, and the number of turns of the coil is large. The densely wound coil 2 can effectively increase the winding length per unit area and ensure the uniformity of heating. At the same time, the resistance of the coil 2 is small. When heating, the coil 2 generates less heat and is less likely to be damaged.

When the coil 2 is wound on the frame 1, it is usually designed in sections according to the distribution of the magnetic force lines. Specifically, the coil 2 may include at least two coil loops, and a plurality of coil loops are sequentially arranged around from inside to outside. In this way, different coil loops correspond to different regions, and as long as parameters such as the position and size of the coil loops are optimized, the magnetic field line densities generated in each region can be basically equal.

Specifically, an annular gap 3 is formed between the innermost coil loop 21 of the coil 2 and the next innermost coil loop 22 adjacent to the innermost coil loop 21 . And the outer diameter of the annular gap 3 is usually less than or equal to 120mm, and the inner diameter of the annular gap 3 is greater than or equal to 40mm. The diameter of the annular gap zone 3 is kept between 40mm-120mm, because the magnetic force lines in the area within the range of φ40-φ120mm of the coil disk are relatively dense, and the cutting effect of the magnetic force lines is most obvious when the coils within this range generate an alternating magnetic field , so the heating effect on magnetically conductive objects such as pots is also the largest. In order to prevent excessive heat generated in this area, the area where the two coil rings closest to the center of the coil disk are disconnected should also be kept within this range. In order to avoid too dense magnetic field lines and ensure uniformity during heating.

As a preferred embodiment, the outer diameter of the annular gap zone 3 should be less than or equal to 90 mm, and the inner diameter of the annular gap zone 3 should be greater than or equal to 70 mm. Because the coil disk is located within the range of φ70-φ90mm, the magnetic field lines are the densest, so the area where the two coil rings closest to the center of the coil disk are disconnected is best located in this range, which can avoid the occurrence of dense and uneven magnetic force lines to the greatest extent. .

Considering factors such as the installation space of the coil 2 and the magnetic field of the coil disc, generally, the distance between two adjacent coil rings is kept between 8-20mm. Because there are usually raised magnetic strips between adjacent coil rings, and the thickness of the magnetic strips is generally about 4mm, the distance between the coil rings should be at least 8mm to ensure that the distance between each coil ring and the magnetic strip There is a gap of 2 mm in both. At the same time, the distance between two adjacent coil rings should not exceed 20mm, otherwise the distance between the disconnections is too large, which will affect the energy consumption of the coil disk.

In addition, in order to ensure that the shape of the coil plate is consistent with the bottom surface of the pot as much as possible, and reduce the difficulty of the manufacturing process of the coil plate, the height difference between the inner edge of the coil 2 and the outer edge of the coil 2 is usually between 5-30 mm. Such a height difference range can keep the curvature of the coil 2 as consistent as possible with the shape of the bottom surface of the pot, which can not only make the distance between the coil 2 and the bottom surface of the pot uniform, so as to achieve a better uniform heating effect, but also prevent Leakage of magnetic force lines around the bottom surface of the pot prevents environmental pollution.

In order to make the energy of the coil disk more concentrated, a magnetic strip can also be provided to guide the magnetic field lines. At this time, the disk frame 1 is provided with holes for arranging the magnetic strips; the coil disk also includes the magnetic strips 4 , which are arranged under the coils 2 , and the magnetic strips 4 pass through the holes 11 . Specifically, the disk frame 1 is provided with positioning holes 11 and some positioning ribs, etc., the magnetic strip 4 can pass through the positioning holes 11 and be arranged under the coil 2 . The magnetic strip 4 is arranged on one side of the coil 2, which can change the magnetic field direction of the coil 2 to reduce the leakage of the magnetic field of the coil 2, so that the magnetic field energy of the coil disk can be concentrated for heating, and the energy utilization efficiency of the coil disk can be improved.

In this embodiment, the coil disk includes a coil frame and a coil. The coil is wound on the frame, and the upper surface of the frame is an arc surface. The coil includes at least two coil rings arranged sequentially from the inside to the outside. The innermost coil of the coil An annular gap zone is formed between the ring and the second inner coil ring adjacent to the innermost coil ring, the outer diameter of the annular gap zone is less than or equal to 120mm, and the inner diameter of the annular gap zone 3 is greater than or equal to 40mm. In this way, the coils of the coil disk can be disconnected and kept in an area where the magnetic force lines are relatively dense, thereby avoiding the occurrence of too dense magnetic force lines and ensuring uniformity during heating.

Embodiment two

On the basis of the above embodiments, the utility model also provides an electromagnetic cooker. The induction cooker includes a heating panel, a casing, and a coil disk as described in the first embodiment above. Wherein, the specific structure and function of the coil disk have been described in detail in the above-mentioned embodiments, and will not be repeated here.

In the electromagnetic oven of this embodiment, the heating panel of the electromagnetic oven is arranged on the top of the casing, and the coil disk is arranged inside the casing and below the heating panel. The coil plate can heat the pot placed on the heating panel, and can avoid the occurrence of too dense magnetic force lines to ensure the uniformity of heating.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand : It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements to some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the various embodiments of the present invention Scope of technical solutions.

Claims (8)

1. A coil disc, characterized in that it comprises a coil frame (1) and a coil (2), the coil (2) is wound on the coil frame (1), and the upper surface of the coil frame (1) is It is an arc surface, and the coil (2) includes at least two coil loops arranged sequentially from the inside to the outside, the innermost coil loop (21) of the coil (2) and the innermost coil loop (21) An annular gap (3) is formed between adjacent secondary inner coil rings (22), the outer diameter of the annular gap (3) is less than or equal to 120 mm, and the inner diameter of the annular gap (3) is greater than or equal to 40mm. 2. The coil disk according to claim 1, characterized in that, the distance between two adjacent coil rings is between 8-20 mm. 3. The coil disk according to claim 2, characterized in that, the outer diameter of the annular gap (3) is less than or equal to 90 mm, and the inner diameter of the annular gap (3) is greater than or equal to 70 mm. 4. The coil disk according to any one of claims 1-3, characterized in that the height difference between the inner edge of the coil (2) and the outer edge of the coil (2) is between 5-30 mm. 5. The coil disk according to any one of claims 1-3, characterized in that, the coil disk further comprises: a magnetic strip (4); the disk frame (1) is provided with a magnetic strip (4) ) of the slot (11), The magnetic strip (4) is arranged under the coil (2), and the magnetic strip (4) passes through the hole (11). 6. The coil disk according to any one of claims 1-3, characterized in that, the coil (2) is connected to the disk frame (1) by an adhesive. 7. The coil disk according to any one of claims 1-3, characterized in that the disk frame (1) has cooling holes. 8. An induction cooker, characterized by comprising a heating panel, a casing, and the coil disk according to any one of claims 1-7.