JP2988050B2 - 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 A conventional electric rice cooker generally uses an electric heater wire as a heating source for many years, but recently, an electric rice cooker using an induction heating coil as a heating source has been manufactured to produce a delicious rice cooker. 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. 4, 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. Reference numeral 112 denotes a lead wire for supplying power to the induction coil 108 and a heater (not shown) which is provided in the lid body 109 and heats the inner lid 113.
10. Reference numeral 114 denotes a button for pressing the engagement lever 115 when the cover 109 is opened.

[0005] In general, when rice is cooked or kept warm in a rice cooker, it is indispensable to cook the most delicious rice and to keep the best insulated state by heating from the entire surface. In general, a lead wire 112 is extended from a hinge portion 110 connecting the main body case 101 and a heater (not shown) provided inside the lid 109 is energized and heated. However , such a configuration
In rice cookers, the inside of the lid is heated by a heater
Because the lid 113 is heated, the heater 113
If the distance is long and the heat of the heater is not sufficiently transmitted
The heater itself is heated,
Difficult to perform sufficient heating due to restrictions such as thermal properties
Met.

[0006]

The present invention relates to such a conventional
To solve the problem of rice cooked rice from the top
The purpose is to heat evenly.

[0007]

For the present invention SUMMARY OF THE INVENTION To achieve the purpose of the, comprising a main body casing for detachably accommodating the pot for cooking, and a lid which lid covering the main body case, before
The cover includes a lid-side induction coil and the lid-side induction coil.
A heating plate formed of a magnetic metal plate that is induction-heated by
It is what you have.

[0008]

According to the electric rice cooker of the present invention, it is possible to sufficiently supply the amount of heating necessary for rice cooking and heat retention from the lid side.

[0009]

EXAMPLES (Example 1) will be described below in detail first that put in Example electric cooker of the present invention. 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 portion of 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. Reference numeral 9 denotes a temperature sensor mounted in a through hole provided at the center of the bottom surface of the protection frame 4. Reference numeral 10 denotes a lid having a knob 11. The inner cover 12 made of heat-resistant plastics is fixed via a heat insulating material 13. Reference numeral 14 denotes an inner lid detachably mounted on the inner cover 12 with pins 20. The inner lid is placed on the brim of the pan 8 to cover the pan 8. Reference numeral 15 denotes a main body-side upper induction coil installed on the inner surface of the flange portion 5 of the protection frame 4 and connected to a power supply unit (not shown) in the main body case 1.

Reference numeral 16 denotes a lid-side induction coil that is excited by the main-body-side upper induction coil 15 and is mounted on a portion of the lid 10 that faces the main-body-side induction coil 15, and is excited by the lid-side induction coil 16. Current flows into induction coil 19
Flow, formed by a magnetic metal plate by the magnetic flux of the induction coil 19.
The heated heating plate 17 is induction heated and cooked from the upper part in the pot 8
It can heat rice or keep warm. Also keep warm
Sometimes only the upper induction coil 15 on the main body side is more controlled than when cooking rice
So that a limited current is supplied,
The upper part can be heated with less heat than when cooking rice
You.

The inner cover 12 is circular and has a structure like an umbrella bone having a large number of voids radially.

[0012] (Example 2) Figure 3 that put in Example 2 electric cooker, the same reference numerals are given to the same components as in Example 1, description thereof is omitted.
That the actual施例2 is different from that of the first embodiment, and that the inner lid 14 is formed of a magnetic metal plate, it is that it does not comprise a heating plate 17. Therefore, Te Example 2 Odor <br/>, Ri by the lid 14 inner induced heating by a magnetic flux of the lid side induction coil 16 is intended for heating the cooking or thermal insulation against cooked rice top.

[0013]

As it is evident from the foregoing description, according to the electric rice cooker of the present invention, whether intended for heating the cooked rice upper EFFICIENT
If you heat evenly, you can cook delicious rice.

[Brief description of the drawings]

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

2A is a circuit schematic diagram of the electric rice cooker, FIG. 2B is a circuit schematic diagram of another example, and FIG. 2C is a circuit schematic diagram of another example.

FIG. 3 is a sectional view of the electric rice cooker according to the second embodiment.

FIG. 4 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 Protective frame 6 Induction coil for bottom heating 7 Induction coil for side heating 8,105 Pot 10,109 Lid 12 Inner cover 14 Inner lid 15 Main part upper induction coil 16 Lid side induction coil 17 Heating Plate 18 Heater for lid heating 19 Induction coil 110 Hinge 112 Lead wire

Claims (1)

(57) [Claims] And 1. A main body case for housing the pot for cooking detachably, and a lid which lid covering the main body case, wherein
The lid includes a lid-side induction coil and the lid-side induction coil.
Has a heating plate made of a magnetic metal plate that is more induction heated
An electric rice cooker.