JPH07108252B2 - Electromagnetic induction heating 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 electromagnetic induction heating rice cooker, and more particularly, to an improvement in a mounting structure of a heat retaining heater in the electromagnetic induction heating rice cooker.

[0002]

2. Description of the Related Art Household cookers using an electromagnetic induction heating source have been developed. A domestic cooker using such an electromagnetic induction heating source is capable of heating only a specific portion to be heated, has high thermal efficiency, and is highly safe, but it is just beginning to spread. Therefore, the price is still high today.

FIG. 4 is a sectional view for explaining the structure of a conventional electromagnetic induction heating rice cooker. For example, the structure of a rice cooker using an electromagnetic induction heating source has a structure as shown in FIG. In FIG. 4, 41 is an inner pot for cooking rice, 4
2 is a work coil. Reference numeral 43 is a lower inner frame, and 44 is an upper inner frame. Reference numeral 45 is a heat retaining heater, and 46 is a screw for fixing the upper inner frame to which the heat retaining heater is attached. Also, 47
Is an external case, 48 is a temperature sensor, and 49 is a heater for keeping the upper lid warm. The work coil 42 is provided at the bottom of the inner pot and generates an alternating magnetic flux. The inner pot 41 is made of a material that generates heat with an eddy current generated by the alternating magnetic flux generated from the work coil. The inner pot 41 and the work coil 42 perform electromagnetic induction heating. The inner frame for accommodating the inner pot 41 is composed of a lower inner frame 43 made of a heat-resistant resin in the lower part, and an upper inner frame 44 made of metal and provided on the upper part. A heat retaining heater 45 is fixed to the outer side of the upper inner frame 44, and the upper inner frame 44 and the lower inner frame 43 are connected to each other.
And are fixed by screws 46. Work coil 42
Is attached to the lower side of the bottom of the inner frame. Such a mounting structure of the lower inner frame and the upper inner frame is mounted by a method by screwing. Further, the heat retention heater 45 is attached to the outside of the upper inner frame 44. As the known documents about the cooker using the electromagnetic induction heating source of this type, JP-1-265482, JP-A No. 2-738
No. 2 publication and the like are mentioned.

[0004]

The electromagnetic induction heating rice cooker has the above-mentioned structure. In such a structure, the inner frame is divided into a lower inner frame and an upper inner frame. Since the number of parts such as screws for joining is increased, the cost of assembly is increased, the strength of the joint is reduced, and a heat insulation heater is provided on the outer surface of the upper inner frame of the pan. As a result, the temperature distribution of the inner frame is generated by heating only the metal part, and the heat retention performance is deteriorated.

Further, since the heat retaining heater is attached to the outer surface of the upper inner frame, heat can easily escape to the outside, resulting in thermal efficiency.
Is deteriorated and the heat retention performance is deteriorated.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a heat retaining heater.
Another object of the present invention is to provide an electromagnetic induction heating rice cooker that can improve heat insulation efficiency by improving the heat efficiency .

[0007]

In order to achieve the above-mentioned object, the electromagnetic induction heating rice cooker of the present invention is provided with the outside of the body.
An outer case to be formed, a work coil provided at the bottom of the inner pot to generate an alternating magnetic flux, an inner pot made of a material that generates heat by an eddy current generated by the alternating magnetic flux generated from the work coil, and an inner pot. An electromagnetic induction heating rice cooker having an inner frame formed of a heat-resistant resin to be housed and provided in the outer case, the heat-resistant resin being formed.
The formed inner frame is formed into a container shape, and this and the outer case are formed.
To the upper part of the inner pot so that the body is composed of
The container shape is integrally formed up to the opening position of the container .
An annular heater for heat retention is installed on the inner pot side of the upper part of the frame.
A heat sink covering the heater for heating is placed in the inner frame above the inner pot.
It is characterized in that it is provided facing the section .

[0008]

According to the above-mentioned means, since the inner frame is formed of the heat-resistant resin having a poor thermal conductivity and the heat retaining heater is provided inside the inner frame, it is difficult for heat to escape to the outside, and the heat efficiency is improved. Can be raised. Therefore, uniform heat can be applied to the inner pot, and the heat retention performance can be improved.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a vertical cross-sectional view for explaining the main structure of an electromagnetic induction heating rice cooker according to an embodiment of the present invention,
2 is a perspective view of the heat retaining heater unit, and FIG.
[Fig. 4] is a partial cross-sectional view of a heat retaining heater unit.

The structure of the electromagnetic induction heating rice cooker is as shown in FIG. 1, and the heat insulation heater unit as shown in FIGS. 2 and 3 is provided on the upper side of the inner frame integrally formed of heat resistant resin. The structure is such that it is placed and fixed on the section.

That is, in FIG. 1, 11 is an inner pot for cooking rice, and 12 is a work coil. Reference numeral 13 is an inner frame for accommodating an inner pot formed in a container shape. 14 is a heat retention heater unit. Reference numeral 15 is a heat retention heater, and 16 is a heat dissipation frame to which the heat retention heater is attached. Reference numeral 17 denotes an outer case that forms the outside of the body, and the inner frame is provided inside the outer case to form the body together with the inner frame 13. Reference numeral 18 is a temperature sensor, and 19 is a heater for keeping the upper lid warm. The work coil 12 is provided at the bottom of the inner pot 11 and generates an alternating magnetic flux. Inner pot 11 is work coil 12
It is made of a material that generates heat by the eddy current generated by the alternating magnetic flux generated from the electromagnetic induction heating by the inner pot 11 and the work coil 12.

The inner frame 13 and the outer case 1 are
7 to reach the upper part from the bottom of the inner pot so as to form a body
Heat-resistant resin is integrally formed into the container shape up to the opening of the body.
This is a ring-shaped heat insulation on the inner pan 11 side of the upper part of this inner frame 13.
A heater 15 is provided to cover the heater 15 for heat retention.
A heating plate is provided on the inner frame 13 so as to face the upper portion of the inner pot.
There is. The work coil 12 is attached to the lower side of the bottom of the inner frame 13.

As shown in FIGS. 2 and 3, the heat retention heater unit 14 has a heat dissipation frame 16 formed in a metal ring shape.
In addition, the heat retention heater 15 is attached to the upper part of the upper part, and the upper part thereof is horizontally deformed to form a flange part. In the flange part of this heat insulation heater unit 14 ,
Thus, the heat retention heater unit 14 is attached to the upper part inside the inner frame 13.

Since the structure for attaching the heat retaining heater unit to the electromagnetic induction heating rice cooker is such a structure,
The heat retaining heater 15 is provided by the annular heat retaining unit 14.
Will enter the inside of the inner frame 13 formed of heat-resistant resin, and heat will not easily escape to the outside, and the heat can be efficiently heated in the inner pot by the heat- retaining heater 15 to improve the heat-retaining performance. You can

The heat radiating frame 16 to which the heat retaining heater 15 of the heat retaining heater unit 14 is attached may be aluminum or a rust-prevented iron plate, or a metal plate may be welded to form an annular structure at low cost. Can be finished.

[0016]

As described above, according to the electromagnetic induction heating rice cooker of the present invention, the heat retaining heater enters the inner side of the inner frame made of the heat-resistant resin, and the heat hardly escapes to the outside. , The inner pot can be heated with good heat efficiency, and the heat retention performance can be improved.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view illustrating a main part structure of an electromagnetic induction heating rice cooker according to an embodiment of the present invention.

FIG. 2 is a perspective view of a heat retention heater unit.

FIG. 3 is a partial cross-sectional view of a heat retention heater unit.

FIG. 4 is a sectional view illustrating a structure of a conventional electromagnetic induction heating rice cooker.

[Explanation of symbols]

 11,41 Inner pot 12,42 Work coil 13 Inner frame 14 Insulating heater unit 15,45 Insulating heater 16 Radiating frame 17,47 Outer case 18,48 Temperature sensor 19,49 Upper lid Insulating heater 43 Lower inner frame 44 Upper in Frame 46 Screws that fix the heater for heat retention

Claims (1)

[Claims] 1. An outer case that forms the outside of the body, a work coil that is provided at the bottom of the inner pot to generate an alternating magnetic flux, and a material that generates heat with an eddy current generated by the alternating magnetic flux generated from the work coil. In the outer case, which is made of heat resistant resin that contains the inner pot and the inner pot
An electromagnetic induction heating rice cooker having an inner frame provided , wherein the inner frame formed of the heat-resistant resin has a container shape.
And the outer case forms a body.
Contents up device body opening position reaching the upper portion from the inner pan bottom portion as
It is integrally formed in the shape of a vessel, and an annular heater for heating is provided on the inner pot side of the upper part of the inner frame to cover the heater for heating.
An electromagnetic induction heating rice cooker , wherein a heating plate is provided on the inner frame so as to face the upper portion of the inner pot .