JPH0584126A - Electric rice cooker - Google Patents

Abstract

PURPOSE:To provide the title rice cooker which has an induction coil as a heating source, with a lid which has no exposed lead wire to be connected with power source, and is removable from a body to be washed. CONSTITUTION:The title rice cooker is provided with a body side upper part induction coil 15 on a body case 1 in addition to induction coils 6, 7 to heat a pan 8 and a lid side induction coil 16 for heating the upper part of the cooker to boil rice or keep it warm, which is magnetically connected with the body side upper part induction coil 15 with no lead wires connected with power source.

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 used in general households and utilizing induction heating.

[0002]

2. Description of the Related Art Conventional electric rice cookers have generally used electric heater wires as a heating source for many years, but recently, those using induction heating coils as a heating source have been manufactured, and delicious rice cookers have been produced. However, it has been widely used because it is possible.

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 fixedly attached to the lower surface thereof. Reference numeral 104 denotes a protective frame made of heat-resistant plastic, which constitutes the bottom portion 10 of the pan 105.
6, and a side surface portion 107 continuously provided above the side surface portion 6. An induction coil 108 is arranged on the outer surface of the bottom portion 106 of the protective frame 104 so as to face the bottom portion of the pan 105. A lid 10 made of plastics is provided on top of the main body case 101.
9 is supported by a hinge portion 110 via a pin 111 so as to be openable and closable. Reference numeral 112 denotes a lead wire for supplying power to the induction coil 108 and a heater (not shown) provided in the lid body 109 and heating the inner lid 113, respectively.
10 are arranged. Reference numeral 114 denotes a button that presses the engagement lever 115 when opening the lid 109.

In general, when cooking rice or keeping warm with a rice cooker, it is indispensable to heat the whole surface to cook the most delicious rice and to keep the best warm condition, and heating from the upper surface of the pan 105 is performed with the lid 109. 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 for heating. However, in the rice cooker having such a configuration, the hinge portion 110 is used to energize the heater inside the lid 109, and the lead wire 11 is applied to this portion.
2 is provided, the lid 109 is attached to the main body case 10.
It cannot be removed from 1. Therefore, the lid 109 cannot be removed and washed, and it is difficult to remove the dirt on the spilled stick.

[0006]

The conventional problem to be solved by the present invention is that the heater of the lid is energized.
The lead wire connecting the power supply unit of the main body case and the heater of the lid body is required, and the lid body cannot be easily removed from the body case for washing.

The present invention aims to solve the above-mentioned conventional problems, and heats the rice cooker from the entire surface by the heating means provided in both the main body case and the lid body, and moreover, the power supply section of the main body case and the lid body. The problem is solved by making it possible to easily remove the lid body from the main body case without connecting the heater to the lead wire.

[0008]

In order to achieve the above-mentioned object, the present invention has an induction coil for heating the bottom and side portions of a pan in a protective frame in a main body case for accommodating the pan.
A body-side upper induction coil connected to the power supply unit of the body is provided in a portion close to the lid, and the lid-side induction coil excited by the body-side upper induction coil is attached to the lid, and The electric rice cooker is equipped with a lid heating heater or an induction coil connected to the lid side induction coil.

[0009]

According to the electric rice cooker of the present invention having the above-mentioned structure, the lid side induction coil that acts to heat the heating plate of the lid body has a current that is magnetically coupled to the body side induction coil. Since it is not necessary to provide a lead wire for connecting to a power source, the lid can be easily removed from the main body case and washed.

[0010]

【Example】

(Embodiment 1) A heat retaining type electric rice cooker according to an embodiment of the present invention will be described in detail below. In FIGS. 1 and 2, reference numeral 1 is a main body case, and a bottom plate 3 having support legs 2 is fixedly attached to the lower surface thereof. Reference numeral 4 denotes a protective frame made of heat-resistant plastic, and a flange portion 5 provided on an upper peripheral portion is fixed to the upper surface of the main body case 1. 6 is an induction coil for heating the bottom surface mounted on the bottom of the protective frame 4, and 7 is the protective frame 4.
With a side heating induction coil installed on the lower side of the pan, the pan 8 having a magnetic metal layer housed in the protective frame 4 is heated by the bottom heating induction coil 6, and rice and water in the pan 8 are heated. The contents of and are cooked. 9 is a temperature sensor mounted in a through hole provided at the center of the bottom surface of the protective frame 4,
Reference numeral 10 denotes a lid body having a knob 11, which is detachably mounted on the flange portion 5 at the upper end portion of the protective frame 4, and an inner cover 12 made of heat-resistant plastic is provided with a heat insulating material 13 interposed therebetween. And is stuck. Reference numeral 14 denotes an inner lid that is detachably attached to the inner cover 12 by a pin 20, and the peripheral portion of the inner lid is placed on the collar portion of the pot 8 to cover the pot 8. Reference numeral 15 denotes a main body side upper induction coil installed on the inner surface of the flange portion 5 of the protective frame 4 and is connected to a power supply portion (not shown) in the main body case 1. 16 is an upper induction coil 1 on the main body side
5 is attached to a portion of the lid side induction coil that is excited by 5 and faces the main body side induction coil 15 in the lid body 10. The current excited in the lid side induction coil 16 causes the lid heating heater 18 to generate heat. The heating plate 17 is heated.

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

The heat of the heating plate 17 heats the upper portion of the cooked rice via the inner lid 14. The connection between the power source and the induction coils 6, 7, 15 and 16 and the lid heating heater 18 in this case is as shown in FIG.

As described above, according to the present embodiment, the heating plate 17 for heating the cooked rice in the upper portion of the pan 8 both during cooking and at the time of heating is a lid-side induction coil that is magnetically coupled to the body-side upper induction coil 15. Since it is heated by the electric current of 16, the lead body 10 does not need a lead wire connected to a power source, and can be configured to be detachable from the main body case 1. Therefore, the lid body 10 can be removed from the main body case 1 and washed as a whole, and dirt such as a stick can be easily removed.

In the first embodiment, if the heating plate 17 is formed of a magnetic metal heating plate and the lid heating heater 18 is an induction coil 19 as shown in FIG. The heating plate 17 is induction-heated so that the rice can be heated from the upper portion in the pan 8 or heated. In addition, as shown in FIGS. 2A and 2B, the bottom surface heating induction coil 6, the side surface heating induction coil 7 and the main body side upper induction coil 15 installed in the main body case 1 are connected in parallel to the power supply unit, or Whether to connect in series as shown in FIG. 2C can be freely selected depending on design conditions such as the size and shape of the pot. In addition, a limited current is supplied to only the main body side upper induction coil 15 during heat retention as compared to when cooking rice, so that the upper portion of the pan can be heated with less heat than when cooking rice.

(Embodiment 2) FIG. 3 shows a heat retention type electric rice cooker according to Embodiment 2, in which the same components as those of Embodiment 1 are designated by the same reference numerals and the description thereof will be omitted. The second embodiment is the first embodiment.
Is that the inner lid 14 is formed of a magnetic metal plate and that the heating plate 17 is not provided. Therefore, in the second embodiment, the inner lid 14 is induction-heated by the magnetic flux of the lid-side induction coil 16 to heat or heat the cooked rice to the upper portion of the cooked rice.

Of course, the lid side induction coil 16 is excited by the main body side upper induction coil 15, and the lid 10
Does not need a lead connected to the power supply

[0017]

As described in the above embodiments, the electric rice cooker of the present invention has a lid magnetically coupled to the main body side induction coil of the main body case without equipping the lid with the lead wire connected to the power source. Since the cooked rice is heated from above using the body side induction coil, not only can delicious rice be cooked by heating it evenly, but the lid can be easily removed from the case to wash it, and it is clean. It has the advantage that it can be kept at.

[Brief description of drawings]

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

2A is a schematic circuit diagram of the electric rice cooker, FIG. 2B is a schematic circuit diagram of the other example, and FIG. 2C is a schematic circuit diagram of the other 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 cross section of a main part of the conventional electric rice cooker.

[Explanation of symbols]

 1,101 Main body case 4,104 Protective frame 6 Bottom heating induction coil 7 Side heating induction coil 8,105 Pan 10,109 Lid 12 Inner cover 14 Inner lid 15 Main body side upper induction coil 16 Lid side induction coil 17 Heating Plate 18 Lid heating heater 19 Induction coil 110 Hinge 112 Lead wire

Claims (6)

[Claims] 1. A main body case that detachably accommodates a pan for cooking rice, and a lid body that detachably covers the main body case, wherein a main body side induction coil is incorporated in the main body case,
An electric rice cooker in which a lid side induction coil that is excited by a body side induction coil and a heater that heats from the upper portion of the pan by the current excited in the lid side induction coil are installed in the lid body. 2. A main body case that detachably accommodates a pan for cooking rice, and a lid body that detachably covers the main body case, wherein the main body case incorporates a main body side induction coil,
An electric rice cooker in which a lid side induction coil that is excited by a body side induction coil and a magnetic metal heating plate that is heated from the top of a pot by heat generated by the magnetic flux of the lid side induction coil are installed in the lid body. 3. The electric rice cooker according to claim 1, wherein the main body side induction coil for exciting the lid side induction coil is installed in the main body case separately from the induction coil serving as the heating source for the pan. 4. The lid side induction coil excited by the main body side induction coil is attached to a portion of the lid body facing the main body side induction coil, and is connected to a lid heating heater for heating from the top of the pot. The electric rice cooker according to 1 or 3. 5. The lid side induction coil excited by the main body side induction coil is attached to a portion of the lid body facing the main body side induction coil, and heats a magnetic metal heating plate heated from above the pot. The electric rice cooker according to claim 2 or 3, wherein the electric rice cooker is connected to an induction coil of the package. 6. The main body side induction coil comprises three induction coils of a bottom side heating induction coil for heating the bottom surface of the pot, a side surface heating induction coil for heating the side surface and a main body side upper induction coil for exciting the lid side induction coil. The electric rice cooker according to claim 1, 2, 3, 4, or 5, wherein the three induction coils are connected in series or in parallel to a power source unit installed in the main body case.