JP3170826B2 - Electric rice cooker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric rice cooker which is used in ordinary households and uses induction heating.

[0002]

2. Description of the Related Art Conventional electric rice cookers generally use an electric heater as a heating source for many years. Recently, however, an electric rice cooker using an induction heating coil as a heating source has been manufactured. Is often used because of the possibility.

An example of the configuration of a conventional electric rice cooker using this type of induction heating coil will be described with reference to FIG.

In FIG. 3, reference numeral 101 denotes a main body case, and a bottom plate 103 having support legs 102 is fixed to a lower surface thereof. Reference numeral 104 denotes a protective frame formed of plastics having heat resistance, and a bottom portion 10 constituting a storage portion of the pot 105.
6, and a side surface portion 107 continuously provided thereabove. Reference numeral 108 denotes an induction coil disposed on the outer surface of the bottom 106 of the protective frame 104 so as to face the bottom of the pot 105. A plastic lid 10 is provided on the upper part of the main body case 101.
9 is supported by a hinge portion 110 via a pin 111 so as to be freely opened and closed. 112 is the induction coil 108 and the lid 1
09 for supplying power to heaters (not shown) installed in the inner lid 113 for heating the inner lid 113.
It is arranged in. Reference numeral 114 denotes a button for pressing the engagement lever 115 when the cover 109 is opened.

[0005] Generally, when rice is cooked in a rice cooker or when it is to be kept warm after it is cooked, it is necessary to heat the entire surface of the rice cooker, such as the upper and lower sides, to cook the most delicious rice. It will be. Heating from the upper surface of the pan 105 is achieved by energizing a heater (not shown) provided inside the lid 109 by extending a lead wire 112 from a hinge 110 connecting the lid 109 and the main body case 101. Heating was common. However, in the rice cooker having such a configuration, since the lead wire 112 is provided in this portion using the hinge portion 110 to energize the heater inside the lid 109, the lid 109 is attached to the main body case. Cannot be removed from 101. Therefore, lid 1
Since it was not possible to remove 09 and wash it, it was difficult to remove the dirt from the spill-on bed. In addition, there is a market in which the lid can be removed from the main body case, but of course, this product does not have a heater on the lid, and the rice in the rice cooker can be It is not heated.

[0006]

The conventional problem to be solved by the present invention is that the heater of the lid is energized,
A lead wire connecting the heating source of the main body case and the heater of the lid body is required, and the lid body cannot be easily removed from the main body case and washed by the presence of the lead wire.

An object of the present invention is to solve such a conventional problem.

[0008]

SUMMARY OF THE INVENTION The present invention is to achieve the purpose of the present body for detachably accommodating the pot of cooking
A case, a cover for detachably covering the body case, an inner cover disposed on a lower surface of the cover, and a body-side induction coil for induction-heating the inner cover; A coil is disposed in the main body case so as to face a peripheral edge of the inner lid, and the inner lid is provided at an upper edge of the pan.
To seal the inside of the pot,
A heat conductive layer and a magnetic metal layer are arranged on the surface .

[0009]

According to the electric rice cooker of the present invention, the temperature of the inner lid itself is increased by the alternating magnetic field generated by the current flowing through the induction coil on the main body side, and the rice in the pot is heated. Of course, in the heat retention after cooking rice, the rice on the upper surface in the pot is heated.

As described above, since the heat of the magnetic metal body heated by the upper induction coil on the main body side can be radiated to rice or rice in the pan without providing any lead wire on the lid body, the lid body is The case can be easily removed and the whole case can be washed.

[0011]

(Embodiment 1) Hereinafter, an insulated electric rice cooker according to an embodiment of the present invention will be described in detail.

In FIGS. 1 and 2, reference numeral 1 denotes a main body case to which a bottom plate 3 having a support leg 2 is fixed on the lower surface. Reference numeral 4 denotes a protective frame made of heat-resistant plastics, and a flange 5 provided on an upper peripheral portion is fixed to an upper surface of the main body case 1. Reference numeral 6 denotes a bottom surface heating induction coil mounted on the lower bottom of the protection frame 4, and reference numeral 7 denotes a side surface heating dielectric coil installed below the protection frame 4, having a magnetic metal layer housed in the protection frame 4. The pot 8 is heated by the bottom-surface heating induction coil 6 to heat and cook the contents of rice and water in the pot 8. 9 is a temperature sensor attached to a through hole provided at the center of the bottom surface of the protection frame 4 and 10 is a knob 1
The lid 1 is detachably mounted on the flange 5 at the upper end of the protective frame 4 to cover the pot 8. Reference numeral 12 denotes a ring portion projecting inward from the peripheral edge of the lid 10, which is in close contact with the edge of an inner lid 15 made of a clad metal plate composed of a magnetic metal layer 13 and an aluminum layer 14. Accordingly, the lid 10 integrally covers the pot 8 detachably with the inner lid 15. Reference numeral 16 denotes a main body side upper induction coil installed on the inner surface of the brim portion 5 of the protection frame 4, connected to a power supply unit (not shown) in the main body case 1, and facing the edge of the inner lid 15. Since it is installed, the magnetic metal layer 1 of the clad metal plate forming the inner lid 15 by applying AC power
An eddy current flows through 3 and the inner lid 15 is induction-heated by Joule heat generated by the eddy current to heat the inside of the pan 8 from above. The aluminum layer 14 of the clad metal plate forming the inner lid 15 has a function of conducting heat well and is in close contact with and integral with the magnetic metal layer 13. Reference numeral 17 denotes a packing attached to the inner lid 15 for sealing the upper edge of the inner pan 8.

As described above, according to the present embodiment, the inner lid 15 for heating the cooked rice on the upper part of the pot 8 both during cooking and while keeping the temperature is maintained by applying AC power to the upper induction coil 16 on the main body side. Since it is heated, the lid 10 does not need a lead wire connected to a power source, and the main body case 1
It can be configured to be able to freely contact with and separate from. Accordingly, the lid 10 can be removed from the main body case 1 and washed in a round manner, and dirt such as rice can be easily removed.

(Embodiment 2) FIG. 3 shows Embodiment 2; however, the same components as those in Embodiment 1 are denoted by the same reference numerals, and description thereof is omitted.

The difference between the second embodiment and the first embodiment shown in FIG.
Is made of aluminum which is a good thermal conductor and has no magnetic metal layer as in the first embodiment. And inner lid 15
A magnetic metal ring 18 is fixed to the periphery of the magnetic metal ring 18, and the magnetic metal ring 18 faces the main body side upper induction coil 16.

Therefore, when an AC power is applied to the magnetic metal ring 18 which is connected to a power supply unit (not shown) in the main body case 1, an eddy current flows through the magnetic metal ring 18 and Joule heat generated by the eddy current causes the magnetic metal ring 18. Generates heat and heats the inner lid 15 of a good conductor, so that the pot 8 is heated from above by the inner lid 15. Also in the second embodiment, of course, the lid 10 does not need a lead wire connected to a power supply, and can be removed from the main body case 1 and washed.

[0017]

As described in the above embodiments, the electric rice cooker according to the present invention has the inner lid heated by the induction coil on the main body side without mounting the lead wire connected to the power supply on the lid body. , To heat the rice cooker from above. Therefore, by heating evenly, not only delicious rice can be cooked, but also since there is no lead wire in the lid, it can be easily removed from the main body case and washed, so that it can be kept clean.

[Brief description of the drawings]

FIG. 1 is a sectional view of an electric rice cooker according to a first embodiment of the present invention.

FIG. 2 is a sectional view of an electric rice cooker according to a second embodiment of the present invention.

FIG. 3 is a side view showing a main part of a conventional electric rice cooker in cross section.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1,101 Main body case 4,104 Protection frame 6 Bottom heating induction coil 7 Side heating induction coil 8,105 Pot 10,109 Lid 13 Magnetic metal layer 14 Aluminum layer 15 Inner lid 16 Main body side upper induction coil 18 Magnetic metal Ring 110 Hinge 112 Lead wire

Claims (1)

(57) [Claims] 1. A main body for detachably storing a cooking pot
And a lid body for detachably covering the main body case,
An inner lid disposed on the lower surface of the lid, and a main body-side induction coil for induction heating the inner lid, wherein the main body-side induction coil is disposed in the main body case so as to face a peripheral edge of the inner lid. In addition to the arrangement of the inner lid,
An electric rice cooker in which a pot is abutted to seal the inside of the pot, and a heat conductive layer and a magnetic metal layer are arranged on the entire inner lid .