CN210075631U - Electromagnetic oven - Google Patents

Abstract

The utility model provides an induction cooker, which comprises a bottom shell (1), a panel, a coil panel (2) and a circuit board (30), wherein a coil (22) comprises an inner ring coil winding (221) and an outer ring coil winding (222) which are sleeved with each other from a central position to an edge position, a gap is arranged between the outer edge of the inner ring coil winding (221) and the inner edge of the outer ring coil winding (222), and the gap forms an annular interval area (20); a magnetizer is arranged at the central position of the coil (22), and an inner ring coil winding (221) is wound on the periphery of the magnetizer; the inner loop coil winding (221) and the outer loop coil winding (222) are connected in series. The utility model discloses can reduce the installation degree of difficulty of coil to the magnetic field evenly distributed that the guide coil produced is in each position of coil panel, and the heating cold district and the heating high temperature area of pan when having reduced the heating greatly make the pan whole be heated more evenly.

Description

Electromagnetic oven

Technical Field

The utility model relates to the technical field of household appliances, especially, relate to an induction cooker.

Background

The induction cooker as a common electromagnetic cooking appliance has the advantages of rapid heating, no open fire, safety, convenience and the like, and is favored and approved by more and more consumers. The electric cooking appliance is an electric cooking appliance which heats by utilizing electromagnetic induction and consists of a high-frequency induction coil panel (namely an excitation coil), a controller, a ferromagnetic material pot bottom cooker and the like. When the electric cooker is used, alternating current is introduced into the coil panel, an alternating magnetic field is generated around the coil, and a large amount of eddy current is generated when the magnetic force lines of the alternating magnetic field penetrate through the bottom of the ferromagnetic material, so that heat required by cooking is generated. In order to better control the heating power during the use of the induction cooker, the temperature in the pot needs to be detected.

In the current electromagnetic oven, the coil is generally placed on an electromagnetic coil panel, and the electromagnetic coil panel usually comprises a tray and a magnetic strip of ferrite. The magnetic strips are arranged on the surface of one side of the plate rack in a radial shape, and the coil is continuously coiled or coiled on the magnetic strips at small intervals. Because the temperature of the induction cooker needs to be accurately controlled, a temperature measuring device for detecting the heating temperature of the induction cooker, such as a Negative Temperature Coefficient (NTC) component with accurate temperature control, is disposed in the central area of the coil panel, so that there is a vacant area in the central position of the coil, and the coil is not wound to this position, but is used for disposing the NTC component.

Due to the arrangement of the NTC assembly, the uncoiled coil at the central position of the coil disc is caused, the magnetic induction line density at the central position is reduced, and a larger heating and cooling area is generated at the central position. And the winding mode of the coil leads the magnetic fields of the areas near the middle point of the radius of the coil panel to be mutually superposed, so that the heating temperature of the local area is overhigh, and the heating uniformity and the cooking effect of the induction cooker are influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve at least one problem mentioned in the background art, the utility model provides an electromagnetism stove can reduce the installation degree of difficulty of coil to the magnetic field evenly distributed that the guide coil produced is in each position of coil panel, and the heating cold district and the heating high temperature region of pan when having reduced the heating greatly make the pan whole be heated more evenly.

In order to achieve the above object, the utility model provides an electromagnetic oven, including drain pan, panel, coil panel and circuit board, enclose into the holding chamber between drain pan and the panel, the coil panel is located the holding intracavity, and the coil panel includes coil, coil and circuit board electric connection.

The coil comprises an inner ring coil winding and an outer ring coil winding which are sleeved with each other from the center position to the edge position, a gap is formed between the outer edge of the inner ring coil winding and the inner edge of the outer ring coil winding, and an annular interval area is formed by the gap.

The central position of the coil is provided with a magnetizer, and the inner ring coil winding is wound on the periphery of the magnetizer.

The inner ring coil winding and the outer ring coil winding are connected in series.

The utility model provides an induction cooker sets up to interior loop coil winding, annular space region and interior loop coil winding through separating the coil on the coil panel to reduce the coil number of turns in the annular space region, make coil quantity in interior loop coil winding and the outer loop coil winding all be greater than the coil quantity in annular space region, thereby reduce the magnetic field of distribution in annular space region, reduce the area of heating high temperature area. The magnetizer is arranged at the central position of the coil, and the magnetic field generated by the coil is guided to the central position of the coil panel by the magnetizer to be gathered, so that the magnetic field is enhanced at the central position of the coil panel, namely, the integral heating energy distribution area of the coil panel is expanded to the central position, thereby greatly reducing the central cold area of the cooker during heating. Therefore, the area of the heating high-temperature area and the area of the central cold area can be reduced simultaneously by the induction cooker, so that the heating high-temperature area is dispersed to a larger area, and the cooker is guaranteed to be heated more uniformly integrally. Through establishing ties inner loop coil winding and outer loop coil winding, not only can reduce both and set up the degree of difficulty on the coil panel, can also control the operating condition and the heating effect of inner loop coil winding and outer loop coil winding simultaneously to simplify the electromagnetism stove heating control process, improved heating control efficiency.

In the above electromagnetic oven, optionally, the coil further includes a connecting wire located in the annular gap region, and two ends of the connecting wire are respectively connected to the outer lead end of the inner coil winding and the inner lead end of the outer coil winding, so as to connect the inner coil winding and the outer coil winding in series.

The connecting wire is arranged in the annular interval area, so that the inner ring coil winding and the outer ring coil winding are connected, the winding process of the inner ring coil winding and the outer ring coil winding on the coil disc is simplified, the working state and the heating effect of the inner ring coil winding and the outer ring coil winding can be controlled simultaneously, and the heating control efficiency of the induction cooker is improved.

In the above electromagnetic oven, optionally, the ratio of the projected area of the inner ring coil winding on the horizontal plane to the projected area of the outer ring coil winding on the horizontal plane is 0.3-1.2. The ratio of the projected area of the annular separation region in the horizontal plane to the projected area of the coil disc in the horizontal plane is 0.15-0.42.

In the above electromagnetic oven, optionally, the ratio of the projected area of the inner ring coil winding in the horizontal plane to the projected area of the outer ring coil winding in the horizontal plane is 0.33-0.5.

The ratio of the projected area of the annular separation region in the horizontal plane to the projected area of the coil disc in the horizontal plane is 0.38-0.42.

In the above electromagnetic oven, the inner diameter of the inner ring coil winding is optionally 12-25 mm.

The annular spacing region has an internal diameter of 60-116 mm.

The outer diameter of the annular spacing region is 118-134 mm.

The outer diameter of the outer ring coil winding is 155-190 mm.

In the above described induction cooker, optionally, the inner diameter of the annular spacing region is 68-76 mm; the outer diameter of the annular spacing region is 126-134 mm.

The sizes of the inner ring coil winding, the annular interval area and the outer ring coil winding are set to be within the ranges, so that the distribution of the magnetic induction lines on the coil panel can be effectively and uniformly distributed, and the heating uniformity of the coil panel is improved.

In the above electromagnetic oven, optionally, the coil tray further includes a coil tray frame, and the magnetizer is disposed on the coil tray frame or the bottom case.

The magnetizer is a magnetic conduction column.

Or the magnetizer comprises a plurality of magnetic conductive strips which are radially arranged by taking the center of the coil panel as a circle center.

Or the magnetizer comprises a plurality of magnetic conductive strips, and the plurality of magnetic conductive strips are circumferentially arranged in a ring shape by taking the center of the coil panel as a circle center.

In the above electromagnetic oven, optionally, the electromagnetic oven further comprises a temperature measuring component for detecting the heating state of the electromagnetic oven, and the temperature measuring component is electrically connected with the circuit board in the accommodating cavity.

The temperature measuring component is arranged on any one of the coil tray frame, the bottom shell and the panel.

Through set up the temperature measurement subassembly in the electromagnetism stove is inside, utilize the temperature measurement subassembly can acquire the heating temperature of the pan on the electromagnetism stove in real time to be convenient for the electromagnetism stove according to this heating temperature adjustment heating state, realize the purpose of the accurate accuse temperature of electromagnetism stove.

In the above electromagnetic oven, optionally, the detection end of the temperature measurement component is located in a region outside the central position of the coil tray, and the temperature measurement component is located in a region of the annular spacing region where no connection wire is arranged.

The detection end of the temperature measurement component is arranged to be located in an area outside the central position of the coil plate frame, the temperature measurement component can be prevented from occupying the area of the central position of the coil plate frame, so that the coil can be wound into the area conveniently, the winding density of the coil in the central position is improved, the range of a central cold area is reduced, and the heating uniformity of the induction cooker is improved. Based on the regional coil quantity of establishing of annular interval is less, therefore the space is more abundant, through setting up the temperature measurement subassembly in the regional region that does not set up the coil of annular interval, has effectively utilized the inside space of drain pan for the assembly is more convenient, can effectively reduce the interference that the temperature measurement subassembly produced other parts.

In the above electromagnetic oven, optionally, the detection end of the temperature measurement component is located on one side of the annular interval region close to the inner ring coil winding.

The heat dissipation based on the marginal position of pan is put more fast than central point, consequently sets up in the temperature measurement subassembly and is close to coil panel central point and put one side in the annular interval region, and the measured temperature is closer to actual heating temperature, can effectively guarantee the accuracy of temperature measurement result and the accuse temperature effect of reinforcing electromagnetism stove.

In the above electromagnetic oven, optionally, a ratio of a distance from the temperature measuring unit to a center position of the coil bobbin holder to an outer diameter of the outer ring coil winding ranges from 0.2 to 0.25.

In the above electromagnetic oven, optionally, the coils on the coil panel are all three layers of loosely wound coils, and the distance between the outer wall surfaces of adjacent coils is 0.8-1.4 mm.

The structure of the present invention and other objects and advantages thereof will be more clearly understood from the following description of the preferred embodiments taken in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an induction cooker according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a coil panel of an induction cooker according to an embodiment of the present invention;

fig. 3 is a cross-sectional view of a coil panel a-a of an induction cooker according to an embodiment of the present invention.

Description of reference numerals:

1-a bottom shell;

101-an air inlet hole;

102-air outlet;

11-upper cover;

12-lower cover;

2-coil panel;

21-coil plate frame;

22-a coil;

221-inner loop coil winding;

222 — outer loop coil winding;

223-connecting lines;

224 — a first terminal;

225-a second terminal;

23-a magnetic strip;

20-an annular spacing zone;

3-a circuit board assembly;

30-a circuit board;

31-a heat sink;

4, a temperature measuring component;

5-a magnetizer;

6-lamp panel.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the drawings in the preferred embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

In the description of the present invention, it is to be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning a fixed connection, an indirect connection through an intermediary, a connection between two elements, or an interactive relationship between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Fig. 1 is a schematic structural diagram of an induction cooker according to an embodiment of the present invention. Fig. 2 is a schematic structural diagram of a coil panel of an induction cooker according to an embodiment of the present invention. Fig. 3 is a cross-sectional view of a coil panel a-a of an induction cooker according to an embodiment of the present invention.

Referring to fig. 1 to 3, an embodiment of the present invention provides an induction cooker, including a bottom case 1, a panel, a coil panel 2 and a circuit board 30, a holding cavity is enclosed between the bottom case 1 and the panel, the coil panel 2 is located in the holding cavity, the coil panel 2 includes a coil 22, and the coil 22 is electrically connected to the circuit board 30.

The coil 22 includes an inner coil winding 221 and an outer coil winding 222 sleeved with each other from the center position to the edge position, and a gap is formed between the outer edge of the inner coil winding 221 and the inner edge of the outer coil winding 222, and the gap forms an annular spacing region 20.

The central position of the coil 22 is provided with a magnetizer, and the inner ring coil winding 221 is wound on the periphery of the magnetizer.

The inner loop coil winding 221 and the outer loop coil winding 222 are connected in series.

It should be noted that, the induction cooker may specifically include: drain pan 1, coil panel 2, circuit board assembly 3, cooling fan, temperature measurement subassembly 4, lamp plate 6 and panel. Wherein, the panel is located the top of drain pan 1, and the panel can be ceramic panel, also can be glass panels, the utility model discloses do not limit to the material of panel. The bottom shell 1 and the panel jointly enclose a containing cavity capable of containing the coil panel 2, the circuit board assembly 3, the heat dissipation fan, the lamp panel 6 and the temperature measurement assembly 4.

Wherein the coil disc 2 comprises in particular a coil 22. The circuit board assembly 3 specifically includes a circuit board 30, and the coil 22 is electrically connected to the circuit board 30. The heat radiation fan is used for radiating heat for the coil panel 2, the circuit board assembly 3 and other devices. In a specific implementation, the circuit board 30 is generally provided with electronic components such as an Insulated Gate Bipolar Transistor (IGBT) and a bridge rectifier, and the IGBT and the bridge rectifier generate heat greatly, so that in order to perform better heat dissipation on the circuit board 30, the circuit board assembly 3 may further include a heat sink 31, the heat sink 31 contacts the electronic components on the circuit board 30, heat generated by the electronic components is rapidly transferred to the heat sink 31, and the heat is dissipated through the heat sink 31.

Specifically, an operation knob may be disposed on a side surface of the bottom case 1, and the operation knob may be rotated to implement opening and closing of the induction cooker, time adjustment, power adjustment, mode selection, or the like. Of course, an operation key may be provided on the panel, and the operation key may be a mechanical key or a touch key, and may also be used to implement the on/off, time adjustment, power adjustment, mode selection, and the like of the induction cooker.

When the induction cooker is used for cooking, the cooker filled with food materials is placed on the panel of the induction cooker, the induction cooker is electrified, namely, high-frequency current flows through the coil 22 on the coil panel 2, and the generated magnetic lines cut the cooker, so that countless small eddy currents are formed on the bottom surface of the cooker, and the cooker is heated.

Wherein, seted up fresh air inlet 101 and exhaust vent 102 on the drain pan 1, the electromagnetism stove during operation, outside cooling air of electromagnetism stove gets into in the drain pan 1 from fresh air inlet 101 under radiator fan's effect, then blows to heating element such as coil panel 2, circuit board subassembly 3, takes away heating element's heat, then hot-blast air blows out to the electromagnetism stove outside from exhaust vent 102 to realize the heat dissipation of electromagnetism stove. In this embodiment, the air inlet 101 is specifically formed on the bottom wall of the bottom case 1 and is located right below the heat dissipation fan. The air outlet 102 is specifically formed in a side wall of the bottom case 1 away from the heat dissipation fan. Of course, the air inlet 101 may be formed on the side wall of the bottom case 1, and the air outlet 102 may be formed on the bottom wall of the bottom case 1.

The bottom case 1 may specifically include: a lower cover 12 and an upper cover 11 positioned above the lower cover. In the present embodiment, the lower cover 12 is a cavity structure, and the upper cover 11 may be a frame cover. The side wall of the lower cover 12 is formed as at least part of the side wall of the bottom case 1, and the air outlet 102 is specifically opened on the side wall of the lower cover 12. Of course, it is also possible that the upper cover 11 comprises side walls, the side walls of the upper cover 11 forming at least part of the side walls of the bottom shell 1, in which case the air outlet 102 may in particular be provided in the side walls of the upper cover 11. Alternatively, the bottom case 1 includes an upper cover, a middle cover and a lower cover, wherein the side wall of the middle cover is formed as at least a part of the side wall of the bottom case 1, in which case the air outlet 102 may be specifically opened on the side wall of the middle cover.

Wherein, the coil 22 specifically includes: an inner ring coil winding 221 and an outer ring coil winding 222 disposed outside the inner ring coil winding 221, and a gap is formed between an outer edge of the inner ring coil winding 221 and an inner edge of the outer ring coil winding 222, and the gap is formed as an annular gap region 20.

In the current coil panel, the winding is generally performed from the center of the coil panel 2 to the edge, and a large space is left in the center for placing the NTC component, i.e., there is no gap between the outer edge of the inner coil winding 221 and the inner edge of the outer coil winding 222. The winding method causes the magnetic lines generated by the inner loop coil winding 221 and the magnetic lines generated by the outer loop coil winding 222 to overlap at the connection position of the two, so that the magnetic lines at the position are too dense, the position is high in heat, and a pot corresponding to the position is easy to stick.

In order to solve the above technical problem, in this embodiment, a gap is provided between the outer edge of the inner coil winding 221 and the inner edge of the outer coil winding 222, and the gap forms an annular interval region 20, so that the inner coil winding 221 and the outer coil winding 222 respectively form electromagnetic fields in an inner region and an outer region, the inner and outer two groups of magnetic fields respectively diverge to the respective outer sides, and converge in the annular interval region 20 to form a uniform electromagnetic field having a density approximately equal to that of magnetic lines of force directly above the inner coil winding 221 and the outer coil winding 222, thereby further improving the uniformity of the pot heating.

In particular, during the winding process of the coil 22, the coil panel 2 includes a coil panel frame 21, and the coil 22 is particularly wound on the coil panel frame 21. Wherein, a winding slot may be provided at the coil bobbin 21, and the coil 22 may be wound along the winding slot.

Further, the central point of the coil 22 that this embodiment provided puts and is provided with magnetizer 5 to interior ring coil winding 221 is around establishing the periphery at the conductor, and this magnetizer 5 can be soft magnetic material, the utility model discloses do not do the injecing to its concrete material, as long as can effectively guide the magnetic line of force can.

During the concrete realization, coil plate rail 21's center department has the mounting hole, and magnetizer 5 specifically is located this mounting hole, and magnetizer 5 specifically can bond in the mounting hole, perhaps has the fixed knot who is used for fixed magnetizer 5 in the mounting hole and constructs, for example, fixed knot constructs including setting up the holding surface in the bottom of mounting hole, and perhaps, fixed knot constructs including setting up spacing muscle on the inside wall of mounting hole, establishes magnetizer 5 card in the mounting hole through spacing muscle.

Compared with the prior art that the NTC component is arranged at the central position of the coil panel 2, the NTC component is not arranged at the central position of the coil 22 provided by the embodiment, so that the coil 22 can be wound to the central position, the central position is provided with the magnetizer 5 which can guide the magnetic field generated by the coil 22 to the central area of the coil panel 2 and gather the magnetic field, and the magnetic field is enhanced at the central position of the coil panel 2, namely, the integral heating energy distribution area is expanded to the center of the coil panel 2, thereby greatly reducing the central cold area of the cooker during heating, dispersing the high-heat area to a larger area, and enabling the cooker to be heated more uniformly.

Moreover, because the magnetic lines of force that coil 22 circular telegram produced are two-way from top to bottom, in order to make the magnetic lines of force that coil 22 circular telegram produced gather in coil panel 2 top as much as possible for more magnetic lines of force cut the pan, improve the heating effect to the pan, coil panel 2 can also include magnetic stripe 23, and magnetic stripe 23 specifically is located the below of coil panel frame 21. Specifically, magnetic stripe 23 can be with coil plate rail 21's central point to put and be radial mode interval distribution to downward magnetic line of force shields, prevents that the magnetic line of force from revealing downwards, has not only improved the heating effect to the pan, can also prevent that the phenomenon that the downward magnetic line of force cuts the desktop that contains the metal material and leads to the desktop to generate heat from appearing, promptly, magnetic stripe 23 has still played the effect of preventing reverse heating.

In this embodiment, the magnetizer 5 is specifically a magnetic conductive column, wherein the magnetic conductive column may be specifically a solid magnetic conductive column, or may be a hollow magnetic conductive column, for example, an annular magnetic conductive column. It should be noted here that, when the magnetizer 5 is an annular magnetic conductive column, the size of the inner annular cavity of the annular magnetic conductive column is smaller than that of the temperature measuring assembly 4. Specifically, the center department of prior art's coil panel is provided with temperature measurement component, temperature measurement component's periphery has magnetic stripe or magnetic ring, but the space that magnetic stripe or magnetic ring enclose holds temperature measurement component, because temperature measurement component is located center department, consequently, coil panel center department can't form the magnetic field of gathering together, and when magnetizer in this embodiment was annular magnetic conduction post, the space that annular magnetic conduction post encloses is less than temperature measurement component far away, therefore, this magnetizer can carry out fine guide to magnetic field, make coil panel center department form the magnetic field of gathering together, that is to say, the magnetizer of this embodiment is totally different with temperature measurement component outlying magnetic stripe or magnetic ring among the prior art.

In other implementation manners, it may also be that magnetizer 5 includes a plurality of magnetic stripes of leading, a plurality of magnetic stripes of leading use the center of coil panel 2 to be radial arrangement as the centre of a circle, or, a plurality of magnetic stripes of leading use the center of coil panel 2 to be cyclic annular as centre of a circle circumference interval arrangement, what need explain here is, when a plurality of magnetic stripes of leading arrange and be cyclic annular, the inner chamber size of this ring structure is less than temperature measurement component far away, as described above, the magnetizer of this embodiment is completely different with peripheral magnetic stripe of temperature measurement component or magnetic ring among the prior art.

Further, referring to fig. 2, the coil 22 further includes a connecting line 223 located in the annular gap region 20, and both ends of the connecting line 223 are respectively connected to the outer lead end of the inner coil winding 221 and the inner lead end of the outer coil winding 222, so as to connect the inner coil winding 221 and the outer coil winding 222 in series.

It should be noted that, in the electromagnetic oven provided in the present embodiment, the inner coil winding 221 and the outer coil winding 222 may be connected in series through the connection line 223 located in the annular partition area 20, so that the inner coil winding 221 and the outer coil winding 222 may be connected to form a complete coil 22, and the complete coil 22 has a first terminal 224 and a second terminal 225. Either one of the first terminal 224 and the second terminal 225 may be used as a wire inlet terminal of the complete coil 22, and the other one may be used as a wire outlet terminal of the complete coil 22. The following description will take the first terminal 224 as the incoming terminal and the second terminal 225 as the outgoing terminal.

The winding process of the coil panel 2 may be that the wire bundle of the first terminal 224 extends to the center of the coil 22 and starts from the center, the winding of the inner coil winding 221 may be completed first, and then extends to the outer coil winding 222, and when the wire bundle passes through the annular gap area 20, the wire bundle does not pass through and form the connecting wire 223. Finally, the winding is completed at the position of the outer ring coil winding 222, and then the wire harness is led out from the edge position of the coil 22 to form a second terminal 225.

Or, in the actual use process, the winding mode of the coil panel 2 may also be: the wire harness of the second terminal 225 is wound from the edge position of the coil 22 toward the center position, the winding of the outer-loop coil winding 222 is completed first, and then extends to the inner-loop coil winding 221, and when the wire harness passes through the annular spacing region 20, the winding is not performed, but the wire harness directly passes through and forms the connecting wire 223. Finally, the winding is completed at the position of the inner ring coil winding 221, and then the wire harness is led out from the center position of the coil 22 to form the first terminal 224. The two winding modes are completed by the same wire harness, so that both the conductivity and the connection strength are higher.

Or, in the actual use process, the winding manner of the coil panel 2 may also be: the inner coil winding 221 and the outer coil winding 222 complete respective windings simultaneously, and then the terminal of the inner coil winding 221 near the outer edge and the terminal of the outer coil winding 222 near the inner edge are connected in the annular spacing region 20, thereby forming the connection line 223. The winding mode can greatly reduce the winding time and improve the winding efficiency.

In practical use, a user may select any one of the winding manners as needed, which is not limited in this embodiment.

In the using process of the induction cooker, the coil 22 can be connected with the circuit board 30 through the first terminal 224 and the second terminal 225, compared with the case that the inner ring coil winding 221 and the outer ring coil winding 222 are respectively connected with the circuit board 30, the arrangement mode of the embodiment can effectively reduce the number of the terminals connected with the circuit board 30, thereby reducing the installation space of the circuit board 30 occupied by the terminals, reducing the volume of the circuit board 30 to a certain extent, improving the use efficiency of the circuit board 30, and reducing the manufacturing cost of the circuit board 30 and the induction cooker.

In addition, when the induction cooker works, the electric quantity of the current flowing into the inner ring coil winding 221 and the outer ring coil winding 222 can be simultaneously controlled through the circuit board 30, so that the working state and the heating effect of the two are controlled, and the heating control efficiency of the induction cooker is improved.

Referring to fig. 2, in the coil panel 2 of the induction cooker provided in the present embodiment, the ratio of the projected area of the inner coil winding 221 on the horizontal plane to the projected area of the outer coil winding 222 on the horizontal plane is 0.3-1.2. The ratio of the projected area of the annular gap region 20 in the horizontal plane to the projected area of the coil disk 2 in the horizontal plane is 0.15 to 0.42.

In an alternative embodiment, the ratio of the projected area of the inner loop coil winding 221 in the horizontal plane to the projected area of the outer loop coil winding 222 in the horizontal plane is 0.33-0.5.

The ratio of the projected area of the annular gap region 20 in the horizontal plane to the projected area of the coil disk 2 in the horizontal plane is 0.38 to 0.42.

On the basis, as a preferred embodiment, the ratio of the projected area of the inner loop coil winding 221 on the horizontal plane to the projected area of the outer loop coil winding 222 on the horizontal plane is 0.5;

the ratio of the projected area of the annular gap region 20 in the horizontal plane to the projected area of the coil disk 2 in the horizontal plane is 0.42.

It should be noted that, as is clear from the above description, the magnetic field in the annular gap region 20 is formed by the electromagnetic fields of the inner and outer regions formed by the inner coil winding 221 and the outer coil winding 222, respectively, diffusing into the annular gap region 20, and therefore the magnetic field distribution area formed by the inner coil winding 221 and the outer coil winding 222, respectively, is important.

When the ratio of the projection area of the inner coil winding 221 on the horizontal plane to the projection area of the outer coil winding 222 on the horizontal plane is too small, and the ratio of the projection area of the annular interval region 20 on the horizontal plane to the projection area of the coil panel 2 on the horizontal plane is too small, it indicates that the distribution region of the inner coil winding 221 on the entire coil panel 2 is too small, and the generated magnetic field is not enough to be distributed to the predetermined position of the annular interval region 20, so that the magnetic field generated by the outer coil winding 222 cannot be butted with the magnetic field generated by the annular interval region 20, and is uniformly distributed in the entire annular interval region 20, so that the magnetic field distribution in the annular interval region 20 is not uniform, and the heating uniformity of the entire.

It can be understood that, when the ratio of the projection area of the inner coil winding 221 on the horizontal plane to the projection area of the outer coil winding 222 on the horizontal plane is too large, and the ratio of the projection area of the annular space region 20 on the horizontal plane to the projection area of the coil panel 2 on the horizontal plane is too large, the distribution region of the inner coil winding 221 on the entire coil panel 2 is too large, the magnetic field generated by the inner coil winding overlaps with the magnetic field generated by the outer coil winding 222, resulting in a large magnetic field strength at the overlapping position, and thus generating a high-temperature heating region, which may also result in uneven distribution of the magnetic field in the annular space region 20, and further affect the uniformity of heating of the entire coil panel 2.

Therefore, in practical use, the ratio of the projected area of the inner coil winding 221 in the horizontal plane to the projected area of the outer coil winding 222 in the horizontal plane, and the ratio of the projected area of the annular gap region 20 in the horizontal plane to the projected area of the coil panel 2 in the horizontal plane may be taken within the above range, and the specific values of the above two ratios are not limited in this embodiment.

Tests show that the central position of the coil panel in the prior art is not provided with the magnetizer of the embodiment, the coil is arranged from the central position of the coil panel to the edge position, an annular heating area is arranged on a heated cooker, the inner diameter of the heating area is 45mm, the outer diameter of the heating area is 150mm, and the temperature of the heating high-temperature area is 273 ℃.

The central position of the coil panel 2 of this embodiment sets up magnetizer 5, and the coiling mode of coil 22 subregion can form annular heating region on the pan equally, and under the same experimental condition, the internal diameter of heating region reduces to 30mm, and the external diameter increases to 160mm to the temperature reduction of heating high temperature region is 223 ℃. Therefore, the experimental result can show that the area of the heating cold area close to the central position and the area of the heating cold area close to the edge position can be effectively reduced by the arrangement mode of the coil panel 2 in the embodiment, the temperature of the heating high-temperature area is further reduced, the heating effect shown by the coil panel is the heating area close to the edge position, the heating temperature of the heating high-temperature area of the annular interval area 20 is weakened, the existing heating high-temperature area is dispersed to a larger area, the heat is ensured to be distributed more uniformly in the whole cooker, and the heating effect of the induction cooker is optimized.

For example, based on the fact that the coil panel 2 may be wound in multiple layers, that is, multiple layers of coils 22 may be included in each annular winding slot from bottom to top, the coils 22 of the coil panel 2 provided in this embodiment are all three layers of loosely wound coils, and the distance between the outer wall surfaces of adjacent coils 22 is 0.8-1.4 mm.

It should be noted that, the three-layer sparse winding coil described above may be understood that each annular winding slot may include three layers of coils 22 from bottom to top, and after the coils 22 are filled in the winding slots, there is at least a slot wall thickness of the winding slot between two adjacent coils 22. If the width of the winding slot is larger, the coil 22 may be located at the middle of the winding slot, or near the inner circle (i.e. the winding slot is near the inner circle coil winding 221) side of the winding slot, or near the outer circle (i.e. the winding slot is near the outer circle coil winding 222) side of the winding slot. The present embodiment does not limit the above-mentioned arrangement.

The slot width of the winding slot provided by this embodiment can be only filled with the coil 22, that is, when the coil 22 is disposed in the winding slot, the slot walls of the inner and outer rings of the winding slot are tightly attached to the coil 22, so as to fix the coil 22. At this time, the distance between the inner circle sides of the adjacent winding grooves is 2.5-4mm, so that the distance between the outer wall surfaces of the adjacent coils 22 can be secured to be 0.8-1.4 mm. Because the adjacent coils 22 have a certain interval, a coil open-winding structure is formed, and in actual use, a user can adjust specific values of the distance range between the inner ring sides of the adjacent winding slots and the distance between the outer wall surfaces of the adjacent coils 22 as needed, which is not limited in this embodiment.

When the number of layers of the coil 22 is three, and the ratio of the projected area of the inner coil winding 221 on the horizontal plane to the projected area of the outer coil winding 222 on the horizontal plane, and the ratio of the projected area of the annular partition region 20 on the horizontal plane to the projected area of the coil panel 2 on the horizontal plane are defined by the range provided by this embodiment, the distribution of the magnetic field generated by the coil 22 on the coil panel is more uniform.

Referring to fig. 3, the inner diameter of the inner loop coil winding 221 is 12-25 mm. The inner diameter of the annular spacing region 20 is 60-116mm and the outer diameter of the annular spacing region 20 is 118-134 mm. The outer diameter of the outer loop coil winding 222 is 155-190 mm.

As an alternative embodiment, the inner diameter of the annular spacing region 20 is 68-76 mm. The outer diameter of the annular spacing region 20 is 126 and 134 mm.

On this basis, as a preferred embodiment, the inner diameter of the inner-ring coil winding 221 is 15.6 mm. The inner diameter of the annular spacing region 20 is 76 mm. The outer diameter of the annular spacing region 20 is 126 mm. The outer diameter of the outer loop coil winding 222 is 171 mm.

It should be noted that the inner diameter of the inner coil winding 221 may be the distance indicated by L5 in fig. 3, the inner diameter of the annular separation region 20 may be the distance indicated by L4 in fig. 3, the outer diameter of the annular separation region 20 may be the distance indicated by L2 in fig. 3, and the outer diameter of the outer coil winding 222 may be the distance indicated by L1 in fig. 3. By setting the sizes of the inner coil winding 221, the annular gap region 20, and the outer coil winding 222 to the above ranges, the distribution of the magnetic induction lines on the coil disk 2 can be effectively uniformed, thereby improving the heating uniformity of the coil disk 2.

It should be noted that, referring to fig. 3, the inner diameter and the outer diameter of the coil disk 2 are the diameters of the corresponding positions.

In practical use, the inner diameter of the inner coil winding 221, the inner diameter of the annular space region 20, the outer diameter of the annular space region 20, and the outer diameter of the outer coil winding 222 may be set within the above ranges, and the specific values are not limited in this embodiment.

It should be noted that, in the use process of the present induction cooker, temperature regulation and control are required, and a specific implementation process may be that the temperature measurement component 4 can effectively obtain the real-time heating temperature of the cookware, and the controller on the circuit board adjusts the heating state of the coil panel 2 in real time according to the detection result of the temperature measurement component 4.

Specifically, the center department of prior art's coil panel is provided with temperature measurement component, temperature measurement component's periphery has magnetic stripe or magnetic ring, but the space that magnetic stripe or magnetic ring enclose holds temperature measurement component, because temperature measurement component is located center department, consequently, coil panel center department can't form the magnetic field of gathering together, and when magnetizer 5 in this embodiment was annular magnetic conduction post, the space that annular magnetic conduction post encloses is less than temperature measurement component 4 far away, consequently, this magnetizer 5 can carry out fine guide to magnetic field, make 2 center departments of coil panel form the magnetic field of gathering together, that is to say, magnetizer 5 of this embodiment is completely different with temperature measurement component outlying magnetic stripe or magnetic ring among the prior art.

During the specific implementation, Temperature measuring component 4 includes Temperature measuring element, and Temperature measuring element specifically can be Negative Temperature Coefficient thermistor (NTC for short), certainly, in other implementation, Temperature measuring element also can be thermocouple etc. the utility model discloses not use this as the limit. In addition, the temperature measuring assembly 4 may further include a support for supporting the temperature measuring element, for example, the support is a silica gel support, the silica gel support has a receiving groove capable of receiving the temperature measuring element, and the support may be located on any one of the coil tray frame 21, the bottom case 1 and the panel, which is not limited in this embodiment.

Wherein, temperature measurement component 4 can be one, namely, realizes the temperature measurement of a bit, and perhaps, temperature measurement component 4 also can set up to at least two, namely, realizes the temperature measurement of multiple spot. When the number of the temperature measuring components 4 is at least two, the at least two temperature measuring components 4 are arranged at intervals along the circumferential direction of the annular interval area 20. Through setting up temperature measurement subassembly 4 into at least two to can carry out the temperature measurement to different positions department in the drain pan 1, thereby further improve the accuracy and the measurable scope of temperature measurement, make the accuse temperature of electromagnetism stove more accurate.

Because in the electromagnetism stove of prior art, the temperature measurement subassembly specifically is located the center department of coil panel, because the existence of coil panel center department temperature measurement subassembly, leads to the unable magnetic field that gathers together that forms in coil panel center department, leads to central magnetic field mutual repulsion, when utilizing the electromagnetism stove heating, can have a great cold district center circle on the pan, leads to the pan heating inhomogeneous. Based on this, in the present embodiment, the magnetizer 5 is disposed at the center of the coil disk 2, and the temperature measuring unit 4 is located at a region other than the center of the coil disk 2. The magnetizer 5 can be soft magnetic material, the utility model discloses do not do the restriction to its concrete material, as long as can effectively guide the magnetic line of force can.

That is to say, through set up magnetizer 5 in coil panel 2's center department, make temperature measurement subassembly 4 be located the region outside coil panel 2's center simultaneously, thereby when guaranteeing the effective temperature measurement of temperature measurement subassembly 4, make magnetizer 5 can lead the magnetic field that coil 22 produced at coil panel 2 central area, make it gather together, thereby make magnetic field obtain the enhancement in coil panel 2 center department, namely, whole heating energy distribution district expands to coil panel 2 center, thereby the central cold district of pan when having reduced the heating greatly, make the high-heat district dispersed to on bigger area, make the pan whole be heated more evenly.

In an implementation, the thermometric assembly 4 is located in the annular space 20 in the area where the connecting line 223 is not located.

It should be noted that, the number of the coils 22 wound around the annular spacing region 20 is small, so that the space is relatively abundant, and the temperature measurement component 4 is disposed at a position where the coil 22 is not disposed in the annular spacing region 20, so that the space inside the bottom case 1 can be effectively utilized, the assembly is more convenient, and the temperature measurement component 4 does not interfere with other components.

In an implementation manner, the detecting end of the thermometric component 4 is located on the side of the annular spacing region 20 close to the inner annular coil winding 221, and the ratio of the distance from the thermometric component 4 to the center position of the coil frame 21 to the outer diameter of the outer annular coil winding 222 is in the range of 0.2-0.25.

It should be noted that, when the present electromagnetic oven is used, the bottom center of the pot generally corresponds to the center of the coil 22, the bottom edge of the pot generally corresponds to the outer edge of the coil 22, and the heat dissipation of the edge position of the pot is faster, so that the temperature measurement component 4 is disposed in the annular spacing region 20 near the edge position side of the coil panel 2, the measured temperature is lower than the actual heating temperature, and the accuracy of the temperature measurement result is reduced. And the central point that is close to the pan puts, and the heat dissipation is slower, and the temperature is comparatively more stable, consequently with setting up in temperature measurement component 4 and be close to coil panel 2 central point in the annular interval region 20 and put one side, the measured temperature is more close actual heating temperature, can effectively guarantee the accuracy of temperature measurement result and strengthen the accuse temperature effect of electromagnetism stove.

Further, when the pot is small, if the temperature measuring component 4 is disposed in the middle of the annular spacing region 20 or close to one side of the outer loop winding 222, the distance between the temperature measuring component 4 and the pot is large, and the temperature measuring component 4 cannot accurately measure the real-time heating temperature of the pot. Based on this, this embodiment sets up temperature measurement component 4 in the one side that is close to inner loop coil winding 221 of annular interval region 20, can make temperature measurement component 4 more be close the pan position to acquire the real-time heating temperature of pan, guarantee temperature measurement component 4's temperature measurement precision.

Wherein, the distance from the temperature measuring component 4 to the center position of the coil plate frame 21 may be a distance shown as L3 in fig. 2, and when the ratio of the distance from the temperature measuring component 4 to the center position of the coil plate frame 21 to the outer diameter of the outer-ring coil winding 222 is too large or too small, the position of the temperature measuring component 4 cannot detect the actual heating temperature on the coil plate 2, thereby affecting the accuracy of the temperature measuring result and the temperature control result. In practical use, the specific value of the ratio of the distance from the temperature measuring component 4 to the central position of the coil tray 21 to the outer diameter of the outer-ring coil winding 222 can be set according to needs, and the specific value is not limited in this embodiment.

The embodiment of the utility model provides an electromagnetism stove sets up to interior ring coil winding, annular space region and interior ring coil winding through separating the coil on the coil panel to reduce the coil number of turns in the annular space region, make coil quantity in interior ring coil winding and the outer loop coil winding all be greater than the coil quantity in annular space region, thereby reduce the magnetic field of distribution in annular space region, reduce the area of heating high temperature area. The magnetizer is arranged at the central position of the coil, and the magnetic field generated by the coil is guided to the central position of the coil panel by the magnetizer to be gathered, so that the magnetic field is enhanced at the central position of the coil panel, namely, the integral heating energy distribution area of the coil panel is expanded to the central position, thereby greatly reducing the central cold area of the cooker during heating. Therefore, the area of the heating high-temperature area and the area of the central cold area can be reduced simultaneously by the induction cooker, so that the heating high-temperature area is dispersed to a larger area, and the cooker is guaranteed to be heated more uniformly integrally. Through establishing ties inner loop coil winding and outer loop coil winding, not only can reduce both and set up the degree of difficulty on the coil panel, can also control the operating condition and the heating effect of inner loop coil winding and outer loop coil winding simultaneously to simplify the electromagnetism stove heating control process, improved heating control efficiency.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless specifically stated otherwise.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the drawings described above, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (11)

1. The utility model provides an induction cooker, includes drain pan (1), panel, coil panel (2) and circuit board (30), enclose into the holding chamber between drain pan (1) and the panel, coil panel (2) are located the holding intracavity, coil panel (2) include coil (22), coil (22) with circuit board (30) electric connection, its characterized in that:

the coil (22) comprises an inner ring coil winding (221) and an outer ring coil winding (222) which are sleeved with each other from the center position to the edge position, a gap is formed between the outer edge of the inner ring coil winding (221) and the inner edge of the outer ring coil winding (222), and an annular interval area (20) is formed in the gap;

a magnetizer is arranged at the central position of the coil (22), and the inner ring coil winding (221) is wound on the periphery of the magnetizer;

the inner loop coil winding (221) and the outer loop coil winding (222) are connected in series.

2. The induction cooker according to claim 1, wherein said coil (22) further comprises a connecting wire (223) located in said annular space region (20), and both ends of said connecting wire (223) are respectively connected to an outer lead end of said inner coil winding (221) and an inner lead end of said outer coil winding (222) to connect said inner coil winding (221) and said outer coil winding (222) in series.

3. The induction cooker according to claim 2, characterized in that the ratio of the projected area of the inner loop coil winding (221) in the horizontal plane to the projected area of the outer loop coil winding (222) in the horizontal plane is 0.3-1.2;

the ratio of the projected area of the annular separation region (20) on the horizontal plane to the projected area of the coil disc (2) on the horizontal plane is 0.15-0.42.

4. The induction cooker according to claim 3, characterized in that the ratio of the projected area of the inner loop coil winding (221) in the horizontal plane to the projected area of the outer loop coil winding (222) in the horizontal plane is 0.33-0.5;

the ratio of the projected area of the annular separation region (20) in the horizontal plane to the projected area of the coil disc (2) in the horizontal plane is 0.38-0.42.

5. The induction hob according to claim 4, characterized in, that the inner diameter of the inner ring coil winding (221) is 12-25 mm;

the inner diameter of the annular spacing region (20) is 60-116 mm;

the outer diameter of the annular spacing region (20) is 118-134 mm;

the outer diameter of the outer ring coil winding (222) is 155 mm and 190 mm.

6. Induction cooker according to claim 5, characterized in that the inner diameter of the annular interspace region (20) is 68-76 mm;

the outer diameter of the annular spacing region (20) is 126mm and 134 mm.

7. The induction hob according to any one of the claims 1 to 6, characterized in, that the coil disc (2) further comprises a coil disc frame (21), the magnetizer being arranged on the coil disc frame (21) or the bottom shell (1);

the magnetizer is a magnetic conduction column;

or the magnetizer comprises a plurality of magnetic conductive strips which are radially arranged by taking the center of the coil panel (2) as a circle center;

or the magnetizer comprises a plurality of magnetic conductive strips, and the magnetic conductive strips are circumferentially arranged in a ring shape by taking the center of the coil panel (2) as a circle center.

8. The induction cooker according to claim 7, further comprising a temperature measuring component (4) for detecting the heating state of the induction cooker, wherein the temperature measuring component (4) is electrically connected with the circuit board (30) in the accommodating cavity;

the temperature measuring component (4) is arranged on any one of the coil plate rack (21), the bottom shell (1) and the panel.

9. The induction hob according to claim 8, characterized in, that the inspection end of the temperature measuring assembly (4) is located in the area outside the central position of the coil tray frame (21), and the temperature measuring assembly (4) is located in the area of the annular space area (20) where no connection line (223) is provided.

10. The induction cooker according to claim 9, characterized in that the detecting end of the temperature measuring component (4) is located at one side of the annular spacing region (20) close to the inner ring coil winding (221), and the ratio of the distance from the temperature measuring component (4) to the center position of the coil tray frame (21) to the outer diameter of the outer ring coil winding (222) is in the range of 0.2 to 0.25.

11. The induction hob according to any one of the claims 1 to 6, characterized in, that the coils (22) on the coil disc (2) are all three-layer open coils, and the distance between the outer wall surfaces of adjacent coils (22) is 0.8-1.4 mm.

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