CN209914103U - Electromagnetic oven - Google Patents

Abstract

The utility model provides an induction cooker, which comprises a bottom shell (1), a coil panel (2), a circuit board (30) and a temperature measuring component (4); the coil panel (2) comprises a coil panel frame (21), a coil (22) and a magnetic strip (23), and a magnetizer (5) is arranged at the center of the coil panel (2); the coil (22) comprises an inner ring coil winding (221) and an outer ring coil winding (222), 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), the gap forms an annular interval region (20), and the inner ring coil winding (221) is wound on the outer side of the magnetizer (5); the magnetic strips (23) comprise first magnetic strips (231) correspondingly arranged below the inner ring coil winding (221) and second magnetic strips (232) correspondingly arranged below the outer ring coil winding (222), so that the pot is heated more uniformly.

Description

Electromagnetic oven

Technical Field

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

Background

The electromagnetic oven has the advantages of quick heating, no open fire, no smoke, safety, convenience and the like, and is more and more favored and accepted by consumers.

The electromagnetism stove mainly includes: the coil panel is positioned in the bottom shell; wherein, the coil panel includes the coil plate rail, winds the coil of establishing on the coil plate rail and is located the magnetic stripe of coil plate rail below, and the magnetic line of force that the coil produced after circular telegram cuts the pan of placing on the panel, forms the vortex in pan bottom to heat the pan.

However, in the electromagnetic oven in the prior art, because the center of the coil panel has no magnetic structure, the magnetic field cannot be formed at the center of the coil panel, the central magnetic field is mutually exclusive, and when the electromagnetic oven is used for heating, a large cold area central ring exists on the pot, so that the pot is heated unevenly.

SUMMERY OF THE UTILITY MODEL

In order to solve at least one problem mentioned in the background art, the utility model provides an electromagnetic oven can improve the heating homogeneity.

In order to achieve the above object, the present invention provides an electromagnetic oven, which includes a bottom case, a coil panel located in the bottom case, a circuit board, and a temperature measurement component electrically connected to the circuit board; the coil panel comprises a coil panel frame, a coil wound on the coil panel frame and a magnetic strip positioned below the coil panel frame, and a magnetizer is arranged at the center of the coil panel;

the coil comprises an inner ring coil winding and an outer ring coil winding arranged on the outer side of the inner ring coil winding, a gap is formed between the outer edge of the inner ring coil winding and the inner edge of the outer ring coil winding, the gap forms an annular interval area, and the inner ring coil winding is wound on the outer side of the magnetizer; the magnetic strips comprise a first magnetic strip correspondingly arranged below the inner ring coil winding and a second magnetic strip correspondingly arranged below the outer ring coil winding.

The utility model discloses an electromagnetic oven sets up the magnetizer through the center department at the coil panel to make the magnetizer can lead the magnetic field that the coil produced at coil panel center, make it gather together, thereby make magnetic field obtain strengthening in coil panel center department, promptly, the expansion of whole heating energy distribution district to coil panel center, thereby the central cold district of pan when having dwindled the heating greatly, make the high hot area dispersed to on bigger area, make the pan whole be heated more evenly. Meanwhile, if no gap exists between the outer edge of the inner ring coil winding and the inner edge of the outer ring coil winding of the coil, the magnetic force lines generated by the inner loop coil winding and the magnetic force lines generated by the outer loop coil winding are overlapped at the joint of the two, so that the magnetic force lines at the position are too dense, the position is high in heat, the pot corresponding to the position is easy to be burnt, therefore, by forming an annular spacing region between the outer edge of the inner loop coil winding and the inner edge of the outer loop coil winding, so that the inner ring coil winding and the outer ring coil winding respectively form electromagnetic fields of an inner area and an outer area, the inner magnetic field and the outer magnetic field are respectively diffused towards the respective outer sides, and the magnetic flux is converged in the annular interval area to form a uniform electromagnetic field with the density approximately equal to that of the magnetic flux right above the inner ring coil winding and the outer ring coil winding, so that the heating uniformity of the cookware is further improved. Additionally, the utility model discloses a set up the magnetic stripe into first magnetic stripe and second magnetic stripe, the below of ring coil winding including making first magnetic stripe correspond, guide through the decurrent magnetic line of force that the inner ring coil winding produced of first magnetic stripe, make the second magnetic stripe correspond the below at outer ring coil winding, guide through the decurrent magnetic line of force that the outer ring coil winding produced of second magnetic stripe, thereby guarantee that the magnetic stripe effectively guides the magnetic line of force, the magnetic line of force that makes whole coil produce gathers in coil dish top as much as possible, improve the heating efficiency of pan.

Optionally, the first magnetic stripe and the second magnetic stripe are arranged at intervals along the radial direction of the coil panel and are located on the same straight line.

Compare with the scheme that links to each other first magnetic stripe and second magnetic stripe like this, when guaranteeing that the magnetic stripe is effectively guided the magnetic force line, saved the consumptive material and the cost of magnetic stripe. In addition, the first magnetic strip and the second magnetic strip are more convenient to install, have referential performance during installation, and have a larger guiding range for magnetic lines in the radial direction of the coil disk.

Optionally, a distance between the outer edge of the inner ring coil winding and the inner edge of the outer ring coil winding is not less than a distance between the outer end of the first magnetic stripe and the inner end of the second magnetic stripe.

Therefore, the coverage range of the first magnetic strip and the second magnetic strip can be further ensured, so that magnetic lines of force are guided in a larger range, and downward magnetic lines of force are better shielded.

Optionally, at least two first magnetic strips are arranged in a radial manner by taking the center of the coil panel as a circle center;

the number of the second magnetic strips is at least two, and the at least two second magnetic strips are radially arranged on the periphery of the first magnetic strip by taking the center of the coil panel as a circle center;

one of the first magnetic strips corresponds to one of the second magnetic strips.

Therefore, the whole appearance aesthetic feeling of the coil panel is better, the magnetic stripe can guide the magnetic lines of force in the whole circumference of the coil panel, the magnetic lines of force of the whole coil are distributed more uniformly after the magnetic stripe is guided, and the heating uniformity is improved.

Optionally, the first magnetic strip is a straight magnetic strip; or at least one end of the first magnetic strip protrudes upwards to form a first flange, and the coil tray frame is provided with a first clamping position into which the first flange can be inserted;

the second magnetic strip is a straight magnetic strip; or at least one end of the second magnetic strip protrudes upwards to form a second flange, and the coil tray frame is provided with a second clamping position into which the second flange can be inserted.

When at least one end of the first magnetic strip and the second magnetic strip protrudes upwards to form a flange, the flange can guide the direction of the magnetic force lines, the magnetic force lines are prevented from leaking, and the heating efficiency of the peripheral area of the coil is further improved.

Optionally, the bottom surface of the coil tray frame is provided with a groove, and the first magnetic strip and the second magnetic strip are located in the groove.

Therefore, the installation of the magnetic strip is more convenient and reliable, the thickness of the coil panel is reduced, and the induction cooker can be developed towards thinning.

Optionally, the temperature measuring component is located in a region outside the center of the coil panel.

Optionally, the temperature measuring assembly is disposed on the annular spacing region.

Because the space in annular interval region is abundant, through setting up temperature measurement subassembly on annular interval region, effectively utilized the inside space of drain pan for the assembly is more convenient, and temperature measurement subassembly can not lead to the fact the interference to other parts.

Optionally, the temperature measuring component is arranged in the bottom shell and is located on the periphery of the coil panel.

By making the temperature measuring component be located at the periphery of the coil panel, effective temperature measurement is ensured, and meanwhile, the phenomenon that the temperature measuring component is heated due to the fact that the temperature measuring component is cut by magnetic lines of force generated by the coil can be avoided.

Optionally, the number of the temperature measuring components is at least two,

when the temperature measuring assemblies are arranged on the annular interval region, at least two temperature measuring assemblies are arranged at intervals along the circumferential direction of the annular interval region;

when the temperature measuring components are positioned on the periphery of the coil panel, at least two temperature measuring components are arranged at intervals along the periphery of the coil panel.

Through setting up temperature measurement subassembly into at least two to can carry out the temperature measurement to different positions department, thereby further improve the accuracy nature and the measurable scope of temperature measurement, make the accuse temperature of electromagnetism stove more accurate. In addition, when the temperature measurement subassembly is used for detecting the temperature of the pan of placing on the panel, because the temperature measurement subassembly is two at least, even certain skew takes place for the pan, the temperature measurement subassembly still can detect the temperature of pan to the reliability and the measurable range of temperature measurement have been improved. Moreover, if one of the temperature measuring components fails or is damaged, other temperature measuring components can be used for measuring the temperature, and the normal use of the induction cooker is ensured.

Optionally, the magnetizer is a magnetic conductive column;

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

The construction of the present invention and other objects and advantages thereof will be more apparent 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 needed 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 inventive labor.

Fig. 1 is a perspective view of an internal structure of a bottom case of an induction cooker according to an embodiment of the present invention;

fig. 2 is a top view structural diagram of an electromagnetic oven according to an embodiment of the present invention, in which a magnetizer and a temperature measuring assembly are mounted on a coil panel;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

fig. 4 is a schematic bottom structure diagram of a coil panel 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;

2-coil panel;

21-coil plate frame;

22-a coil;

221-inner loop coil winding;

222 — outer loop coil winding;

23-a magnetic strip;

231 — a first magnetic stripe;

232-a second magnetic stripe;

20-an annular spacing zone;

210-mounting holes;

200-grooves;

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 embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of 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.

Fig. 1 is a perspective view of an internal structure of a bottom case of an induction cooker according to an embodiment of the present invention; fig. 2 is a top view structural diagram of an electromagnetic oven according to an embodiment of the present invention, in which a magnetizer and a temperature measuring assembly are mounted on a coil panel; FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2; fig. 4 is a schematic bottom structure diagram of a coil panel of an induction cooker according to an embodiment of the present invention. Referring to fig. 1 to 4, the present embodiment provides an induction cooker.

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 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.

The coil panel 2 specifically includes a coil panel frame 21 and a coil 22 wound on the coil panel frame 21. In a specific implementation, the coil tray 21 may have a winding slot, and the coil 22 is wound along the winding slot. Because the magnetic line of force that coil 22 circular telegram produced is two-way from top to bottom, in order to make the magnetic line 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. The magnetic strips 23 guide and shield downward magnetic force lines to prevent the magnetic force lines from leaking downwards, so that the magnetic force lines gather above the coil disc 2 as much as possible, the heating effect on the cooker is improved, the phenomenon that the table top generates heat due to the fact that the downward magnetic force lines cut the table top made of metal materials can be prevented, namely, the magnetic strips 23 also play a role in preventing reverse heating.

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 and an upper cover positioned above the lower cover. In this embodiment, the lower cover is a cavity structure, and the upper cover may be a frame cover. The side wall of the lower cover is formed as at least part of the side wall of the bottom case 1, and the air outlet 102 is specifically formed on the side wall of the lower cover. Of course, it is also possible that the upper cover comprises side walls, which are formed as 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. 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 temperature measuring component 4 is electrically connected with the circuit board 30. Temperature measurement component 4 can be used for detecting the temperature of the pan of placing on the panel, also can be used for detecting the temperature of 1 inner chamber of drain pan, can also be used for detecting the temperature of coil panel 2 or the temperature of other devices in the drain pan 1 etc., the utility model discloses not limited to this, temperature measurement component 4 transmits the temperature that detects to circuit board 30 to realize functions such as the accuse temperature of electromagnetism stove.

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 component 4 can further include a support for supporting the temperature measuring element, for example, the support is a silica gel support, and the silica gel support is provided with a containing groove capable of containing the temperature measuring element.

Because in the electromagnetism stove of prior art, the center department of coil panel does not have the magnetic conduction structure, 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 magnetic conductor 5 is provided at 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 the center department of coil panel 2, magnetizer 5 can lead the magnetic field that coil 22 produced in coil panel 2 central zone, makes it gather together to make the magnetic field obtain the enhancement in coil panel 2 central zone, promptly, whole heating energy distribution district expands to coil panel 2 center, thereby has reduced the central cold district of pan during the heating greatly, makes the high-heat district dispersed to on the bigger area, makes the pan whole be heated more evenly.

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.

During the concrete realization, coil plate rail 21's center department has mounting hole 210, and magnetizer 5 specifically is located this mounting hole 210, and magnetizer 5 specifically can bond in mounting hole 210, and perhaps, has the fixed knot who is used for fixed magnetizer 5 in the mounting hole 210 and constructs, for example, fixed knot constructs including the holding surface that sets up in the bottom of mounting hole 210, and perhaps, fixed knot constructs including setting up the spacing muscle on the inside wall of mounting hole 210, establishes magnetizer 5 card in mounting hole 210 through spacing muscle.

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. Wherein, the inner ring coil winding 221 is wound outside the magnetizer 5.

Since there is no gap between the outer edge of the inner loop coil winding 221 and the inner edge of the outer loop coil winding 222, the magnetic lines of force generated by the inner coil winding 221 and the magnetic lines of force generated by the outer coil winding 222 are overlapped at the joint of the two, so that the magnetic lines of force at the position are too dense, the position is high in heat, the pot corresponding to the position is easy to be burnt, therefore, by forming the annular gap region 20 between the outer edge of the inner loop coil winding 221 and the inner edge of the outer loop coil winding 222, so that the inner loop coil winding 221 and the outer loop coil winding 222 form electromagnetic fields of an inner region and an outer region respectively, the inner magnetic field and the outer magnetic field are respectively diffused towards the respective outer sides, and the uniform electromagnetic field with the density approximately equal to that of the magnetic lines of force right above the inner ring coil winding 221 and the outer ring coil winding 222 is formed by converging in the annular spacing area 20, so that the uniformity of the heating of the cooker is further improved.

In this embodiment, the magnetic strips 23 specifically include a first magnetic strip 231 correspondingly disposed below the inner ring coil winding 221 and a second magnetic strip 232 correspondingly disposed below the outer ring coil winding 222.

The electromagnetism stove that this embodiment provided sets up magnetizer 5 through the center department at coil panel 2 to make magnetizer 5 can lead the magnetic field that coil 22 produced at coil panel 2 center, make it gather together, thereby make magnetic field obtain the enhancement in coil panel 2 center department, promptly, 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. Meanwhile, since there is no gap between the outer edge of the inner coil winding 221 and the inner edge of the outer coil winding 222 of the coil 22, the magnetic lines of force generated by the inner coil winding 221 and the magnetic lines of force generated by the outer coil winding 222 are overlapped at the joint of the two, so that the magnetic lines of force at the position are too dense, the position is high in heat, the pot corresponding to the position is easy to be burnt, therefore, by forming the annular gap region 20 between the outer edge of the inner loop coil winding 221 and the inner edge of the outer loop coil winding 222, so that the inner loop coil winding 221 and the outer loop coil winding 222 form electromagnetic fields of an inner region and an outer region respectively, the inner magnetic field and the outer magnetic field are respectively diffused towards the respective outer sides, and the uniform electromagnetic field with the density approximately equal to that of the magnetic lines of force right above the inner ring coil winding 221 and the outer ring coil winding 222 is formed by converging in the annular spacing area 20, so that the uniformity of the heating of the cooker is further improved. Additionally, the utility model discloses a set up magnetic stripe 23 into first magnetic stripe 231 and second magnetic stripe 232, the below of ring coil winding 221 including making first magnetic stripe 231 correspond, guide through the decurrent magnetic line of force that first magnetic stripe 231 produces ring coil winding 221, make second magnetic stripe 232 correspond the below at outer ring coil winding 222, guide the decurrent magnetic line of force that outer ring coil winding 222 produced through second magnetic stripe 231, thereby guarantee that magnetic stripe 23 effectively guides the magnetic line of force, the magnetic line of force of gathering that makes whole coil 22 produce is in coil dish 2 top as much as possible, the heating efficiency of pan is improved.

In the coil panel 2 of the induction cooker provided in the present embodiment, the ratio of the projected area of the inner-ring coil winding 221 on the horizontal plane to the projected area of the outer-ring coil winding 222 on the horizontal plane ranges from 0.3 to 1.2, and/or 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 ranges from 0.15 to 0.42.

Specifically, the ratio of the projected area of the inner-ring coil winding 221 in the horizontal plane to the projected area of the outer-ring coil winding 222 in the horizontal plane may be set to 0.5, and/or 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 may be set to 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/or 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 inner coil winding cannot be butted with the magnetic field generated by the outer coil winding 222, 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 coil panel.

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/or the ratio of the projection area of the annular gap area 20 on the horizontal plane to the projection area of the coil panel 2 on the horizontal plane is too large, the distribution area of the inner coil winding 221 on the entire coil panel 2 is too large, and the magnetic field generated by the inner coil winding overlaps the magnetic field generated by the outer coil winding 222, so that the magnetic field intensity at the overlapping position is large, and therefore, a heating high-temperature region is generated, which also causes the magnetic field distribution in the annular gap area 20 to be uneven, and further affects the heating uniformity 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 2 in the prior art is not provided with the magnetizer 5 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 pot, 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.

Illustratively, referring to FIG. 3, the inner diameter of the inner loop winding 221 is in the range of 12-25 mm. The inner diameter of the annular spacing zone 20 ranges from 60mm to 116mm, and the outer diameter of the annular spacing zone 20 ranges from 118 mm to 134 mm. The outer diameter of the outer loop winding 222 ranges from 155 mm to 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.

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.

In this embodiment, first magnetic stripe 231 and second magnetic stripe 232 set up along the radial interval of coil panel 2, and are located same straight line, compare with the scheme that links to each other first magnetic stripe and second magnetic stripe like this, when guaranteeing that the magnetic stripe effectively guides the magnetic force line, have saved the consumptive material and the cost of magnetic stripe. In addition, the arrangement makes the installation of the first magnetic strip 231 and the second magnetic strip 232 more convenient, the installation has reference, and the guiding range of the magnetic force lines is larger along the radial direction of the coil disc 2.

Preferably, a distance a between the outer edge of the inner coil winding 221 and the inner edge of the outer coil winding 222 is not less than a distance b between the outer end of the first magnetic strip 231 and the inner end of the second magnetic strip 232. This further ensures the coverage of the first magnetic stripe 231 and the second magnetic stripe 232, so as to guide the magnetic lines generated by the inner loop coil winding 221 and the outer loop coil winding 222 in a wider range, and better shield the downward magnetic lines.

In a specific implementation, the first magnetic strips 231 may be set to be at least two, and the at least two first magnetic strips 231 are radially arranged by taking the center of the coil panel 2 as a circle center. The number of the second magnetic strips 232 can be at least two, and the at least two second magnetic strips 232 are radially arranged on the periphery of the first magnetic strips 231 by taking the center of the coil panel 2 as a circle center, wherein one first magnetic strip 231 corresponds to one second magnetic strip 232. Not only make coil panel 2's whole outward appearance aesthetic feeling better like this, and make magnetic stripe 23 can guide the magnetic line of force in coil panel 2's whole week, and the magnetic line of force of whole coil distributes more evenly after the guide, and then has improved the homogeneity of heating.

Specifically, the bottom surface of the coil tray frame 21 may be provided with a groove 200, and the magnetic strips 23 are installed in the groove 200, so that the installation of the first magnetic strip 231 and the second magnetic strip 232 is more convenient, the thickness of the whole coil tray 2 is reduced, and the induction cooker is not too thick. Wherein, can make recess 200 along the radial setting of coil panel 2, be located same straight line first magnetic stripe 231 and second magnetic stripe 232 and be located same recess 200, of course, also can set up the first recess that corresponds first magnetic stripe 231 and the second recess that corresponds second magnetic stripe 232.

The first magnetic strip 231 may be a flat magnetic strip. Also, at least one end of the first magnetic stripe 231 protrudes upwards to form a first flange, that is, the first magnetic stripe 231 may be an L-shaped magnetic stripe or a U-shaped magnetic stripe, and the first flange can guide the direction of the magnetic force lines, so as to avoid the leakage of the magnetic force lines and further improve the heating efficiency of the coil peripheral area. In this case, a first detent into which the first flange can be inserted can be provided on the coil disk carrier 21.

The second magnetic stripe 232 may be a flat magnetic stripe. Also can be, the at least one end of second magnetic stripe 232 upwards protrudes to form the second flange, i.e. second magnetic stripe 232 can be L shape magnetic stripe or U-shaped magnetic stripe, and the second flange can guide the direction of magnetic line of force, avoids magnetic line of force to leak, further improves the heating efficiency of coil peripheral region. In this case, a second detent can be provided on the coil holder 21, into which the second flange can be inserted.

In the present embodiment, the temperature measuring component 4 is specifically located in a region other than the center of the coil disk 2. Referring to fig. 1 and 2, the thermometric assembly 4 is specifically positioned on the annular spacing zone 20. Because the space of the annular interval area 20 is abundant, the temperature measuring component 4 is arranged on the annular interval area 20, the space inside the bottom shell 1 is effectively utilized, the assembly is more convenient, and the temperature measuring component 4 cannot interfere other components.

A limiting structure for fixing the temperature measuring component 4 can be arranged at a position of the coil tray frame 21 corresponding to the annular spacing area 20. Fix temperature measurement component 4 through limit structure, improved temperature measurement component 4's stability, provide the assurance for temperature measurement component 4 effectively measures the temperature.

The limiting structure can specifically comprise an upward convex limiting rib, in a feasible implementation mode, the limiting rib can be an annular limiting rib, and the temperature measuring component 4 is fixed in an annular cavity of the limiting rib. In another possible implementation manner, at least two limiting ribs are provided, and the temperature measuring component 4 is located in a space surrounded by the at least two limiting ribs. For example, two spacing muscle sets up relatively, and temperature measurement subassembly is located wherein by two spacing muscle clamps. Or, the at least two limiting ribs enclose an annular space capable of accommodating the temperature measuring component 4. For the specific form of the limiting structure, the present invention is not limited thereto. Of course, the temperature measuring assembly 4 can also be glued directly to the annular gap region 20 of the coil disk 2.

Specifically, the coil tray 21 may include a magnetic strip footprint and a non-magnetic strip footprint, with the magnetic strip 23 correspondingly disposed below the magnetic strip footprint. In order to better dissipate heat of the coil panel 2, at least a part of the non-magnetic strip coverage area may be provided as a hollow structure. That is to say, through the whole or partial hollowing out that will not magnetic stripe overlay area, promptly, form hollow out construction for coil panel 2's heat accessible fretwork department effluvium has improved coil panel 2's radiating effect, and has reduced coil panel 2's preparation consumptive material, has saved the cost.

Referring to fig. 1 and 2, in a possible implementation manner of the present embodiment, the temperature measuring assembly 4 is specifically disposed on the annular spacing area 20, and corresponds to an area surrounded by extension lines of two adjacent second magnetic strips 232. In another possible implementation, the thermometric assembly 4 may also be disposed on the annular spacing zone 20, corresponding to the zone between the outer end of the first magnetic strip 231 and the inner end of the second magnetic strip 232.

In an implementation, the thermometric assembly 4 is specifically located on the side of the annular spacing region 20 close to the inner coil winding 221, wherein the ratio of the distance from the thermometric assembly 4 to the center of the coil frame 21 to the outer diameter of the outer coil winding 222 can be in the range of 0.2 to 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 if the temperature measurement component 4 is disposed in the annular spacing region 20 near the edge position of the coil panel 2, the measured temperature will be lower than the actual heating temperature, and the accuracy of the temperature measurement result will be 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 sets up temperature measurement subassembly 4 and is close to coil panel 2 central point one side in annular interval region 20, and 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.

It should be noted that the distance from the temperature measuring component 4 to the center of the coil holder 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 of the coil holder 21 to the outer diameter of the outer-ring coil winding 222 is too large or too small, the accuracy of the temperature measuring result and the temperature control result is affected. 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.

In other implementations, the temperature measuring component 4 may also be disposed in the bottom case 1 and located at the periphery of the coil panel 2.

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 temperature measurement assemblies 4 are at least two, when the temperature measurement assemblies 4 are arranged on the annular interval region 20, the at least two temperature measurement assemblies 4 are arranged at intervals along the circumferential direction of the annular interval region 20. Or, when the temperature measuring components 4 are located at the periphery of the coil panel 2, at least two temperature measuring components 4 are arranged at intervals along the periphery of the coil panel 2. Through setting up temperature measurement subassembly 4 into at least two to can carry out the temperature measurement to different positions department, thereby further improve the accuracy nature and the measurable scope of temperature measurement, make the accuse temperature of electromagnetism stove more accurate.

In addition, when temperature measurement subassembly 4 is used for detecting the temperature of the pan of placing on the panel, because temperature measurement subassembly 4 is two at least, even certain skew takes place for the pan, temperature measurement subassembly 4 still can detect the temperature of pan to the reliability and the measurable scope of temperature measurement have been improved.

Moreover, if one of the temperature measuring components 4 is in fault or damaged, the temperature can be measured by the other temperature measuring components 4, and the normal work of the induction cooker is ensured.

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 (10)

1. An induction cooker comprises a bottom shell (1), a coil panel (2) positioned in the bottom shell (1), a circuit board (30) and a temperature measuring component (4) electrically connected with the circuit board (30); the coil panel (2) comprises a coil panel frame (21), a coil (22) wound on the coil panel frame (21) and a magnetic strip (23) positioned below the coil panel frame (21), and is characterized in that a magnetizer (5) is arranged at the center of the coil panel (2);

the coil (22) comprises an inner ring coil winding (221) and an outer ring coil winding (222) arranged on the outer side of the inner ring coil winding (221), 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), the gap forms an annular interval area (20), and the inner ring coil winding (221) is wound on the outer side of the magnetizer (5); the magnetic strips (23) comprise first magnetic strips (231) correspondingly arranged below the inner ring coil winding (221) and second magnetic strips (232) correspondingly arranged below the outer ring coil winding (222).

2. The induction hob according to claim 1, characterized in, that the first magnetic strip (231) and the second magnetic strip (232) are arranged spaced apart in the radial direction of the coil disc (2) and are located on the same straight line.

3. The induction cooking hob according to claim 2, characterized in, that the distance (a) between the outer edge of the inner ring coil winding (221) and the inner edge of the outer ring coil winding (222) is not less than the distance (b) between the outer end of the first magnetic strip (231) and the inner end of the second magnetic strip (232).

4. The induction cooker according to claim 2, characterized in that the number of the first magnetic strips (231) is at least two, and at least two first magnetic strips (231) are arranged in a radial manner with the center of the coil panel (2) as a center;

the number of the second magnetic strips (232) is at least two, and the at least two second magnetic strips (232) are radially arranged on the periphery of the first magnetic strip (231) by taking the center of the coil panel (2) as a circle center;

one of the first magnetic strips (231) corresponds to one of the second magnetic strips (232).

5. The induction hob according to claim 1, characterized in, that the first magnetic strip (231) is a straight magnetic strip; or at least one end of the first magnetic strip (231) protrudes upwards to form a first flange, and the coil tray frame (21) is provided with a first clamping position into which the first flange can be inserted;

the second magnetic strip (232) is a straight magnetic strip; or at least one end of the second magnetic strip (232) protrudes upwards to form a second flange, and the coil tray frame (21) is provided with a second clamping position into which the second flange can be inserted.

6. The induction cooking appliance according to claim 1, wherein the bottom surface of the coil tray frame (21) has a recess (200), and the first magnetic strip (231) and the second magnetic strip (232) are located in the recess (200).

7. The induction hob according to any one of the claims 1 to 6, characterized in, that the temperature measuring assembly (4) is located in an area outside the center of the coil disc (2).

8. The induction hob according to claim 7, characterized in, that the temperature measuring assembly (4) is arranged on the annular spacing area (20);

or the temperature measuring component (4) is arranged in the bottom shell (1) and is positioned on the periphery of the coil panel (2).

9. Induction cooker according to claim 8, characterized in that the temperature measuring assemblies (4) are at least two,

when the temperature measurement components (4) are arranged on the annular interval region (20), at least two temperature measurement components (4) are arranged at intervals along the circumferential direction of the annular interval region (20);

when the temperature measuring components (4) are positioned on the periphery of the coil panel (2), at least two temperature measuring components (4) are arranged at intervals along the periphery of the coil panel (2).

10. The induction hob according to any one of the claims 1 to 6, characterized in, that the magnetizer (5) is a magnetic conductive column;

or the magnetizer (5) 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 (5) 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.

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