JP2005081043A - Rice cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rice cooker which has an almost ring shape magnetic shielding member on the bottom part of the body and in which the diameter and the height of a magnetic shielding member is adjusted to enable a condition of the connection between a heating coil and a pot to be adjusted to thereby locally change the magnetic field distribution of the heating coil resulting in reduction of uneven rice cooking and improvement of rice cooking performance. <P>SOLUTION: A pot 2 is detachably housed in the body 1 of the rice cooker. The pot 2 is induction-heated by a heating coil 5. A magnetic shielding member 9 connected to a circle shape lead wire is set below the heating coil 5. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a rice cooker in which a substantially ring-shaped magnetic shielding member is provided at the bottom of a rice cooker body.

Conventionally, this type of rice cooker covers the upper part of the rice cooker body with a lid that can be opened and closed by a hinge part, and detachably stores the inner pot in a protective frame provided in the rice cooker body. It is configured to supply high frequency power to the bottom heating coil to inductively heat the inner pot with the bottom heating coil and detect the temperature of the inner pot with the bottom sensor, and at the bottom of the rice cooker body is a substantially ring excluding the bottom sensor A magnetic shield plate was provided, and the magnetic shield plate was fixed to the bottom of the rice cooker body by claw fitting or a screw (for example, see Patent Document 1).
Japanese Patent Laid-Open No. 11-56598

  However, in the conventional configuration as described above, generally, the bottom heating coil is composed of concentric inner and outer heating coils, and the distance between the pan and the heating coil may vary due to manufacturing variations. is there. Since such a phenomenon causes a decrease in rice cooking performance and an increase in cooking unevenness, as a means of absorbing such variations and keeping the distance between the pan and the heating coil within a desired dimension, in the production process, Some measures are taken to measure the height of the pan mounting portion at the top of the rice cooker body and adjust the distance between the pan and the heating coil.

  However, according to such an adjusting means, it is possible to move the pan and the two heating coils closer to or away from each other, and in particular, the inner and outer heating coils are formed integrally with the protective frame. In some cases, it is difficult to adjust just the inner heating coil or just the outer heating coil. In addition, it is a plate-like thing provided for the purpose of demagnetizing the lower surface direction of the rice cooker body, and the correlation between the anti-magnetic plate and the rice cooking performance is not particularly considered, so subtle adjustment of the rice cooking performance after completion of the mold Was impossible.

  The present invention solves the above-described conventional problems, and by adjusting the diameter and height of the magnetic-shielding member, the coupling state of the heating coil and the pan can be adjusted, and the magnetic field distribution of the heating coil is locally changed. The purpose is to improve rice cooking performance and rice cooking performance.

  In order to achieve the above object, the present invention is configured such that a pan is detachably stored in a rice cooker body, the pan is induction heated by a heating coil, and a lead wire is formed in a circular shape below the heating coil. It has a connected magnetic-shielding member.

  Thereby, by adjusting the diameter and height of the magnetic-shielding member, the coupling state between the heating coil and the pan can be adjusted, and by changing the magnetic field distribution of the heating coil locally, rice cooking performance, rice cooking performance Can be improved.

  The rice cooker of the present invention can adjust the coupling state of the heating coil and pan by adjusting the diameter and height of the magnetic-shielding member, and cooks by locally changing the magnetic field distribution of the heating coil. Unevenly, rice cooking performance can be improved.

  1st invention is equipped with the rice cooker main body, the pan accommodated in this rice cooker main body so that attachment or detachment is possible, and the heating coil which carries out induction heating of this pan, A lead wire is circled under the said heating coil. It is possible to adjust the coupling state between the heating coil and the pan by adjusting the diameter and height of the magnetic shielding member, and locally distribute the magnetic field distribution of the heating coil. By changing it, it is possible to improve cooking unevenness and rice cooking performance.

  2nd invention is equipped with the rice cooker main body, the pan detachably accommodated in this rice cooker main body, and the heating coil which induction-heats this pan, The said heating coil is a concentric inner heating coil, It is composed of an outer heating coil, and includes a magnetic shielding member having a lead wire connected circumferentially below the inner heating coil. By adjusting the diameter and height of the magnetic shielding member, the inner heating coil and The coupling state between the outer heating coil and the pan can be adjusted, and by changing the magnetic field distribution of the heating coil locally, cooking unevenness and rice cooking performance can be improved.

  According to a third invention, in the first or second invention, the magnetic-shielding member is held by a fixed claw provided at the bottom of the rice cooker body, and the assemblability can be improved.

  4th invention is the said 1st or 2nd invention, The magnetic-shield member is integrally formed in the bottom part of the rice cooker main body, and can reduce an assembly man-hour.

  5th invention is the said 1st or 2nd invention. WHEREIN: A magnetic-shielding member makes a circumference variable, The delicate adjustment of rice cooking performance becomes easy after completion | finish of a metal mold | die, and rice cooking performance better for a user Rice cooker can be provided.

  A sixth invention is the above-described first or second invention, wherein the magnetic-shielding member has a variable mounting height, so that fine adjustment of the rice cooking performance is easy even after the mold is completed, and the rice cooking is better for the user. A rice cooker with high performance can be provided.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

  As shown in FIG. 1, a rice cooker body 1 accommodates a flanged pan 2 in a detachable manner. One end of the rice cooker body 1 is open at the top and the other end is pivotally supported by a hinge shaft 3. The lid 4 is provided to be openable and closable. A heating coil 5 is provided below the pan 2 to heat the pan 2 by induction. This heating coil 5 has an inner heating coil 6 provided near the bottom center of the pan 2 and an outer heating coil 7 provided on the bottom side of the pan 2 arranged concentrically. The heating coil 7 is configured to be electrically connected.

  The heating coil 5 is held by a protective frame 12, and a plurality of ferrites 8 are provided outside the heating coil 5, so that the magnetic field generated by the heating coil 5 is efficiently transmitted to the pan 2. ing. In addition, on the lower surface of the rice cooker body 1, an electrically connected ring-shaped magnetic shielding member 9 is provided opposite to the inner heating coil 6 by caulking both ends of the lead wire with crimp terminals. Electromagnetic waves from the heating coil 6 are prevented from leaking toward the lower surface of the machine body.

  The magnetic-shielding member 9 has a diameter larger than the inner diameter of the inner heating coil 6 and smaller than the outer diameter, and is held by a fixing claw 10 provided on the lower surface of the rice cooker body 1. Moreover, the fixed nail | claw 10 is being fixed with the fixing screw 11, and it can be adjusted to the horizontal and vertical direction with respect to the rice cooker main body 1 by simple remodeling of a metal mold | die.

  The operation of the above configuration will be described. By providing the magnetic-shielding member 9 comprised of a lead wire below the inner heating coil 6, the electromagnetic wave leakage from the inner heating coil 6 to the lower side of the rice cooker body 1 can be suppressed in the same manner as the magnetic-shielding plate comprised of a metal plate. In addition, the magnetic shield member 9 absorbs a part of the magnetic field generated from the inner heating coil 6 so that the magnetic field distribution of the inner heating coil 6 in the portion facing the magnetic shield member 9 is reduced. It becomes possible to give a local influence rather than the case.

  The change in the magnetic field distribution around the heating coil changes the state of convection inside the pan 2 and greatly affects the cooking unevenness and taste during cooking. Thus, the cooked rice can be adjusted, so that the cooking unevenness and taste can be improved, and a rice cooker with better rice cooking performance can be provided to the user.

  Moreover, since the magnetic-shielding member 9 was hold | maintained with the fixed nail | claw 10 provided in the bottom part of the rice cooker main body 1, assembly property can be improved.

  In the above embodiment, the example in which the heating coil 5 is divided into the concentric inner heating coil 6 and the outer heating coil 7 and the magnetic shielding member 9 is provided on the bottom surface of the rice cooker body 1 has been described. Needless to say, the same effect can be obtained even when the heating coil is constituted by one heating coil or when the magnetic-shielding member 9 is provided on the protective frame 12.

  Moreover, the magnetic-shielding member 9 can be integrally formed in the bottom part of the rice cooker main body 1, and can reduce an assembly man-hour.

  Moreover, the magnetic-shielding member 9 can make fine adjustment of rice cooking performance after mold completion by making a circumference variable, and can provide a rice cooker with better rice cooking performance.

  Moreover, the magnetic-shielding member 9 makes variable adjustment of rice cooking performance easy even after completion | finish of a metal mold | die by making attachment height variable, and can provide the rice cooker of rice cooking performance better.

  In addition, in the present embodiment, an example in which the number of the magnetic shielding members 9 is configured by one is described. However, when a plurality of magnetic shielding members are provided, finer adjustment is possible, and rice cooking performance is achieved. Needless to say, the same effect can be obtained in the improvement.

  As mentioned above, the rice cooker concerning this invention can adjust the coupling | bonding state of a heating coil and a pan by adjusting the diameter and height of a magnetic-shielding member, and locally distributes the magnetic field distribution of a heating coil. By changing it, it is possible to improve rice cooking performance and rice cooking performance, so that it is useful as a rice cooker provided with a substantially ring-shaped magnetic shielding member at the bottom of the rice cooker body.

Sectional drawing of the rice cooker of one embodiment of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rice cooker main body 2 Pan 5 Heating coil 9 Magnetic-shield member

Claims (6)

A magnetic shield member comprising a rice cooker body, a pan detachably housed in the rice cooker body, and a heating coil for induction heating the pan, and a lead wire connected circumferentially below the heating coil Rice cooker equipped with. A rice cooker body, a pan that is detachably stored in the rice cooker body, and a heating coil that induction-heats the pan, the heating coil is composed of a concentric inner heating coil and an outer heating coil. And the rice cooker which comprised the magnetic-shielding member which connected the lead wire to the circumferential shape under the said inner heating coil. The rice cooker according to claim 1 or 2, wherein the magnetic-shielding member is held by a fixed claw provided at the bottom of the rice cooker body. 3. The rice cooker according to claim 1 or 2, wherein the magnetic shielding member is formed integrally with the bottom of the rice cooker body. The rice cooker according to claim 1 or 2, wherein the magnetic shielding member has a variable perimeter. The rice cooker according to claim 1 or 2, wherein the magnetic shielding member has a variable mounting height.

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