KR101420875B1 - A cooker - Google Patents

Abstract

The present invention relates to a cooking appliance. In the present invention, the density of the ferrite is concentrated, and the phenomenon that the AC magnetic field of the inductor coil is locally concentrated is prevented. Therefore, according to the cooking apparatus of the present invention, the AC magnetic field of the inductor coil is uniformly diffused as a whole, and safety of the user is secured.

Cooking equipment, induction heating, inductor coil, ferrite core, ferrite

Description

A cooker

The present invention relates to a cooking appliance, and more particularly, to a cooking appliance provided with an induction heating heater using joule heat generated by vortexing generated in a cooking container placed in an AC magnetic field and heat generated by hysteresis.

A cooker is a household appliance that cooks food, and it uses a heat source such as gas or electricity to heat the food. A cooking appliance using electricity includes a heating part that generates heat using electricity; A case in which the heating portion is accommodated; And a top plate coupled to an upper portion of the case; . In such a cooking apparatus, when electricity is applied to the heating unit in a state where the cooking vessel containing food is placed on the top plate, heat generated in the heating unit is transmitted to the cooking vessel through the top plate to heat the food do.

In recent years, there has been recently introduced a cooking appliance provided with an induction heating heater for cooking food by applying an alternating magnetic field to a cooking vessel made of a metal and using heat generated by hand and hysteresis hands generated in the cooking vessel. Such an induction heating heater includes: an inductor coil wound in a predetermined shape; A ferrite for diffusing an AC magnetic field generated from the inductor coil; And a ferrite core on which the ferrite is deposited; .

Hereinafter, a conventional cooking apparatus will be described with reference to the accompanying drawings.

1 is a plan view showing a main part of a conventional cooking device.

Referring to this, a conventional ferrite core 10 includes a core 11; A circular support ring portion 13 having a predetermined diameter centered on the core center portion 11; And a plurality of seating portions (15) extending radially from the core (11) to the support ring portion (13) so as to be spaced from each other by a predetermined central angle; . Ferrite (20) is seated on the seating part (15).

However, the following problems arise in the conventional cooking apparatus equipped with the induction heating heater.

Since the seating portion 15 on which the ferrite 20 is seated is radially extended from the core central portion 11 as described above, the core portion 11 having a narrow area in the AC magnetic field direction of the inductor coil, The density of the ferrite 20 is increased at a portion adjacent to the ferrite 20. Therefore, there is a disadvantage that the AC magnetic field of the inductor coil diffused by the ferrite 20 is locally concentrated.

Further, when the AC magnetic field of the inductor coil is locally concentrated at the portion adjacent to the core center portion 11, the total amount of magnetic noise is increased. Therefore, the safety of the user is deteriorated.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and it is an object of the present invention to provide a cooking appliance which is configured such that the AC magnetic field can be uniformly diffused as a whole.

Another object of the present invention is to provide a cooking appliance which is configured to ensure safety of a user.

According to an aspect of the present invention, there is provided an inductor coil comprising: an inductor coil wound in a ring shape on a coil base; And a ferrite core formed below the inductor coil; Wherein the ferrite core comprises: a core central portion formed at a central portion; A circular support ring portion spaced outwardly of the core center portion; A first ferrite that diffuses an alternating magnetic field of the inductor coil and extends from an outer periphery of the core to a position spaced apart from an inner periphery of the supporting ring; A second ferrite that diffuses an alternating magnetic field of the inductor coil and extends to a position spaced apart from an outer periphery of the core center portion at an inner periphery of the supporting ring portion; And a reinforcing connecting portion connecting the core between the first ferrite and the tip of the second ferrite; .

According to another embodiment of the present invention, there is provided an inductor coil comprising: an inductor coil formed by winding in a ring shape on a coil base; A core center portion formed below the center portion of the inductor coil; A circular support ring portion spaced outward from the outer periphery of the core portion; A first seating portion extending from an outer periphery of the core center portion to a position spaced apart from an inner periphery of the support ring portion; A second seating portion extending from an inner periphery of the support ring portion to a position spaced apart from an outer periphery of the core center portion; A first ferrite seated on the first seating portion; A second ferrite that is seated in the second seating portion; And a reinforcing connecting portion connecting the front end of the second seating portion and the first seating portion; .

According to another embodiment of the present invention, there is provided an inductor coil comprising: an inductor coil formed by winding a ring-shaped coil on a coil base; And a ferrite core positioned below the inductor coil; Wherein the ferrite core includes: a core center portion formed below the center of the inductor coil; a ring-shaped support ring portion spaced from the outer periphery of the core center portion; and a ferrite core extending from the support ring portion toward the core center portion A first seat portion that is positioned so as to alternate with the second seat portion and extends from the core center portion toward the support ring portion and a second seat portion that is located between the first seat portion and the first seat portion, And a second ferrite that is seated on the second seating portion. The first ferrite may include a second ferrite that is seated on the second seating portion, and a second ferrite that seals on the second seating portion.

According to the cooking apparatus of the present invention, there is an advantage that the AC magnetic field of the inductor coil is uniformly diffused as a whole, and safety of the user is ensured.

Hereinafter, embodiments of a cooking apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is an exploded perspective view showing an embodiment of a cooking apparatus according to the present invention, and FIG. 3 is a plan view showing a main part of an embodiment of the present invention.

2, the cooking apparatus according to the present invention includes a case 110, a plurality of induction heating heaters 120, a control unit 130, and a top plate 140.

Various components constituting the cooking device such as the induction heating heater 120 and the control unit 130 are installed in the case 110. The case 110 is preferably heat-treated to prevent the heat of the induction heater 120 from leaking to the outside.

The induction heating heater 120 is for heating and cooking food by induction heating. That is, the induction heating heater 120 generates an AC magnetic field by an applied AC power source. Resistance heat is generated by the eddy currents formed on the bottom surface of the cooking vessel made of metal by the AC magnetic field, and heat due to hysteresis is generated at the same time, so that the food inside the cooking vessel is heated and cooked. The induction heating heater 120 includes a coil base 121, an inductor coil 122, a ferrite core 123, first and second ferrites 128A and 128B, and a my car seat 129.

The coil base 121 is substantially where the inductor coil 122, the ferrite 128A and the ferrite core 128B, the ferrite core 123 and the my car seat 129 are installed. The coil bases 121 are spaced apart from each other by a predetermined distance.

The inductor coil 122 is installed on the coil base 121 to generate a substantially AC magnetic field. The inductor coil 122 is formed by winding a coil several times in a ring shape having a predetermined radius. The diameter of the inductor coil 122 may be determined to be a plurality of different values in consideration of the size of the cooking container.

The ferrite core 123 is positioned below the inductor coil 122. 3, the ferrite core 123 includes a core portion 124, a support ring portion 125, first and second seating portions 126A and 126B, The support ring part 125 is formed in a circular shape having a predetermined diameter around the core center part 124. The first seating portion 126A extends in the radial direction from the outer periphery of the core center portion 124 toward the inner periphery of the support ring portion 125. [ At this time, the tip of the first seating portion 126A is spaced from the inner circumference of the supporting ring portion 125 by a predetermined distance. The second seating portion 126B is spaced apart from the inner periphery of the supporting ring portion 125 by a distance in the radial direction toward the outer periphery of the core center portion 124. [ The tip of the second seating portion 126B is spaced apart from the outer periphery of the core center portion 124 by a predetermined distance. Therefore, the first and second seating portions 126A and 126B are positioned so that substantially only a part thereof overlaps with each other. The reinforcing connecting portion 127 connects the core center portion 124 between the first seating portions 126A and the front ends of the second seating portions 126B adjacent thereto. That is, the reinforcement connecting part 127 reinforces the first and second seating parts 126A and 126B.

The ferrite 128A and the ferrite 128B substantially diffuse the AC magnetic field generated from the inductor coil 122. To this end, the ferrite 128A (128B) is seated on the first and second seating portions 126A and 126B. However, as described above, only the first seating portion 126A extends radially from the outer periphery of the core center portion 124, and only a part of the first seating portion 126A and the second seating portion 126B overlap each other , The density of the ferrite (128A) (128B) in a portion adjacent to the core center portion (124), which is a relatively narrow area in the magnetic field direction of the inductor coil (123), is prevented from being increased.

The microcarrier 129 is provided between the inductor coil 122 and the ferrite core 123. The my car seat 129 serves to prevent the heat generated by the induction heating heater 120 from being directly transmitted to the ferrite core 123 and the ferrites 128A and 128B.

The control unit 130 is for substantially controlling the operation of the cooking apparatus. The control unit 130 is provided at an inner front end portion of the case 110 adjacent to the induction heating heater 120 and receives various operation signals for controlling the operation of the cooking device.

The top plate 140 is coupled to an upper portion of the case 110 to substantially block the inside of the case 110. A cooking vessel is seated on the upper surface of the top plate 140. Accordingly, the heat generated in the induction heating heater 120 is transmitted to the cooking vessel through the top plate 140. The top plate 140 is formed with a plurality of seating portions 141 for indicating a portion corresponding to the electric heater 120 and the induction heating heater 120, that is, a portion where the cooking vessel is seated.

Also, although not shown, a power supply unit and an inverter may be provided inside the case 110. The power supply unit and the inverter are for supplying AC power having a predetermined frequency to the inductor coil 122. More specifically, the power supplied through the power supply unit is supplied to the inductor coil 122 by an AC power source having a predetermined frequency by the inverter.

Hereinafter, the operation of the embodiment of the cooking apparatus according to the present invention will be described in more detail.

The user places the cooking vessel in which the food is placed in the seating portion 141 of the induction heating heater 120, more specifically, the top plate 140 corresponding to the inductor coil 122. In this state, when the user operates the control unit 130 to input an operation signal, the power supplied from the power supply unit by the inverter is supplied to the inductor coil 122 with an AC voltage of a predetermined frequency.

The alternating-current magnetic field generated by the inductor coil 122 is transmitted to the cooking vessel, and the food contained in the cooking vessel is heated by heat due to resistance heat and hysteresis due to eddy current to be cooked. At this time, the AC magnetic field of the inductor coil 122 is diffused by the ferrites 128A and 128B, so that the cooking vessel can be heated more evenly.

As described above, the ferrite 128A and the ferrite core 128B are mounted on the first and second seating portions 126A and 126B of the ferrite core 123 and the first and second seating portions 126A and 126B 126B prevents the ferrite 128A (128B) from being densely packed, particularly at a portion adjacent to the core center 124. [ Therefore, localization of the AC magnetic field of the inductor coil 122 diffused by the ferrite 128A (128B) is prevented.

Also, since the AC magnetic field of the inductor coil 122 is not locally concentrated, the food contained in the cooking vessel can be heated and cooked more efficiently. In addition, an increase in magnetic noise generated by local concentration of the AC magnetic field of the inductor coil 122 is also prevented. According to the experimental results, when the ferrite was arranged as in the conventional example shown in Fig. 1, the magnetic noise of 87 dB was generated. However, when ferrite having the same area was arranged as in the embodiment of the present invention, only 76 db of magnetic noise was generated .

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims and their equivalents. .

In the present embodiment, a part of the first and second seating portions are positioned so as to overlap with each other, but the present invention is not limited thereto. That is, the first and second seat portions may be arranged so as not to overlap each other.

According to the cooking apparatus of the present invention configured as described above, the following effects can be expected.

In the present invention, the alternating magnetic field of the inductor coil is diffused uniformly by the ferrite without local concentration. Thus, the heating of the food is substantially more uniform.

Further, in the present invention, the concentration of the AC magnetic field of the inductor coil is prevented, so that generation of magnetic noise is relatively reduced. Thus, the user can use the product more safely.

1 is a plan view showing a main part of a conventional cooking apparatus;

2 is an exploded perspective view showing an embodiment of a cooking apparatus according to the present invention.

3 is a plan view showing a main part of an embodiment of the present invention.

Claims (12)

An inductor coil wound in a ring shape on a coil base; And A ferrite core formed below the inductor coil; Lt; / RTI > Wherein the ferrite core comprises: A core central portion formed at a central portion; A circular support ring portion spaced outwardly of the core center portion; A first ferrite that diffuses an alternating magnetic field of the inductor coil and extends from an outer periphery of the core to a position spaced apart from an inner periphery of the supporting ring; A second ferrite that diffuses an alternating magnetic field of the inductor coil and extends to a position spaced apart from an outer periphery of the core center portion at an inner periphery of the supporting ring portion; And A reinforcing connecting portion connecting the core between the first ferrite and the tip of the second ferrite; . The method according to claim 1, Wherein the first and second ferrites extend in the radial direction of the inductor coil. The method according to claim 1, Wherein the first and second ferrites are interchanged with each other in a direction of an arc of the inductor coil. The method according to claim 1, Wherein only a part of each of the first ferrite and the second ferrite is overlapped in a circular arc direction of the inductor coil. An inductor coil wound in a ring shape on a coil base; A core center portion formed below the center portion of the inductor coil; A circular support ring portion spaced outward from the outer periphery of the core portion; A first seating portion extending from an outer periphery of the core center portion to a position spaced apart from an inner periphery of the support ring portion; A second seating portion extending from an inner periphery of the support ring portion to a position spaced apart from an outer periphery of the core center portion; A first ferrite seated on the first seating portion; A second ferrite that is seated in the second seating portion; And A reinforcing connecting portion connecting the tip of the second seating portion and the first seating portion; . 6. The method of claim 5, Wherein the first and second seating portions overlap only a part of the inductor coil in a circular arc direction. An inductor coil wound in a ring shape on a coil base; And A ferrite core positioned below the inductor coil; Lt; / RTI > Wherein the ferrite core comprises: A core center portion formed below the center of the inductor coil, A ring-shaped support ring portion spaced apart from the outer periphery of the core, A second seating portion extending from the support ring portion toward the core center portion, A first seat portion positioned to be in line with the second seat portion and extending from the core center portion toward the support ring portion, A reinforcing connecting portion connecting the core center portion between the first seating portion and the first seating portion adjacent thereto and the front end of the second seating portion adjacent thereto, A first ferrite seated on the first seating portion, And a second ferrite that is seated on the second seating portion. The method according to claim 5 or 7, Wherein the first and second seating portions extend in the radial direction of the inductor coil. The method according to claim 5 or 7, Wherein the first and second seating portions are provided so as to be interlocked with each other in the arc direction of the inductor coil. The method according to claim 5 or 7, And a micaceette is provided between the inductor coil and the ferrite core. 8. The method of claim 7, Wherein the first seat portion extends to a position spaced apart from an inner periphery of the support ring portion, And the second seat portion extends to a position spaced apart from the outer periphery of the core center portion. 12. The method of claim 11, And the second seat portion is connected to the core center portion by the reinforcing connecting portion.

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