JPH05207928A - Electromagnetic cooker - Google Patents

Abstract

PURPOSE:To provide an electromagnetic cooker whose electric insulation, rice cooking and also, hot insulation are satisfactory by a comparatively simple structure. CONSTITUTION:The cooker is provided with a cooker main body 6, an outer pot 20 disposed in the cooker main body 6, an inner pot 1 being attachable/ detachable in the outer pot 20, and a cover body 12 for covering the cooker main body 6 so as to be openable/closeable. Also, as for the outer pot 20, the containing part of the inner pot, and a shoulder member 4 for connecting the containing part to the cooker main body 6 are formed integrally by a non-metallic material, and in a bottom part 2, the flank part 3 and the flank upper part 22 of the outer peripheral part of the outer pot 20, coils 8, 9a and 23 for executing induction heating to the inner pot are provided, and in the cover body 12, an inner cover 14 subjected to induction heating by the heating coil 23 provided in the side face upper part 22 is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic cooker which cooks rice by heating by induction heating.

[0002]

2. Description of the Related Art At present, a large proportion of electromagnetic cookers are used in ordinary households. The general structure of this electromagnetic cooker is as shown in FIG. In the figure, an inner pot 1 for storing cooked items such as rice is detachably housed in a cooker body 6. The inner pot 1 is U-shaped as shown in the drawing, and its outer peripheral surface is made of a stainless steel plate so that it can be induction-heated by a heating coil described later,
The inner peripheral surface is made of a two-layer clad material of an aluminum plate having good thermal conductivity, and the inner surface of the aluminum plate is treated with a fluorine resin so that the cooked product does not stick to it. The cooker main body 6 has a storage portion for the inner pot 1. The storage portion includes a protective frame bottom portion 2 formed of a non-metal material such as resin and a protective frame side surface portion formed of a metal material. 3, a shoulder reinforcing member 7 formed of a non-metallic material on which the collar portion 5 of the inner pot 1 is placed in contact with the side surface portion 3 of the protective frame, and for connecting the storage portion and the cooker body 6 The outer pot 20 is formed by the shoulder member 4 formed of a non-metallic material. A heating coil 8 is arranged on the bottom 2 of the protective frame, and a side heater 9 is arranged on the side 3 of the protective frame. The bottom of the cooker body 6 is provided with a control unit 10 that controls rice cooking and heat retention.

A sensor 11 provided so as to come into contact with the inner pot 1 is for detecting the temperature of the cooked product. The cooker main body 6 is covered with a lid 12 so as to be openable and closable. The lid body 12 has a steam vent hole 1 through which steam from the inner pot 1 is released to the outside when the lid body 12 is closed.
3 is provided. In addition, the lid 12 has an inner lid 14
The outer lid of the inner lid 14 is pressed against the collar portion 5 of the inner pot 1 when the lid 12 is closed. In the figure, 15 is a packing for preventing vapor leakage, 19 is a heat insulating material for the lid 12, and 16 is a lid heater provided on the lid 12. When cooking rice,
The bottom heating coil 8 and the side heater 9 of the side surface 3 of the protection frame, which are mainly installed in the bottom 2 of the protection frame, heat the bottom and side surfaces of the inner pot 1, and at the time of heat retention, the lid heater 16 and the side surface of the protection frame. The side heater 9 disposed on the side surface of 3 and the bottom heating coil 8 heat the entire surface of the inner pot 1. Since the side surface portion 3 of the protective frame on which the side surface heater 9 is provided is required to have thermal conductivity and heat resistance, it is made of a material having good thermal conductivity such as an aluminum plate. Further, the shoulder reinforcing member 7 with which the side surface portion 3 of the protective frame contacts is required to be formed of a non-metallic material having better heat resistance than the shoulder member 4, and is therefore a separate component. In the figure, 18 is a heat insulating material for the cooker body 6, and 17 is a holding plate for the bottom heating coil 8.

[0004]

However, in such a conventional electromagnetic cooker, the shoulder member 4, the shoulder portion reinforcing member 7, the protective frame side surface portion 3, the protective frame 3 which constitute the outer pot 20 described above are provided. Since the bottom portion 2 and the like are attached by joining, there is a problem in electrical insulation such as water penetration. Further, since the outer pot 20 is configured by such joining, the configuration is extremely complicated, which naturally raises the cost. Further, when cooking rice, the heating of the inner pot 1 is indirectly performed from the side surface portion 3 of the protective frame which is heated by the side surface heater 9 due to its structure.
There is a limit to the heating of the cooked product, which causes uneven temperature of the inner pot 1. For example, the bottom of the inner pot 1 has a heating coil 8
However, since this portion is heated earlier than the side surface portion of the inner pot 1 which is heated by the side surface heater 9, uneven cooking occurs. Further, at the time of heat retention, even if an attempt is made to heat the inner lid 14 by utilizing the heat of the side heater 9, the heating is indirectly performed from the protective frame side face 3 structurally, so that the desired heat retention is achieved. It is not possible to do so, and after all, the lid heater 16 is provided, or the inner lid 14 and the protective frame side surface portion 3
It is necessary to have a structure in which and are in direct contact with each other, which makes the structure complicated. The present invention has been made to solve the above-mentioned various conventional problems, and has a relatively simple structure, and is an electromagnetic cooker having good electric insulation, rice cookability, and heat retention. For the purpose of providing.

[0005]

SUMMARY OF THE INVENTION To achieve the above object, the present invention provides a cooker main body, an outer cooker installed in the cooker main body, and an inner cooker detachable in the outer cooker. A lid that covers the cooker body so that the cooker body can be opened and closed, the outer pot is integrally formed of a storage portion for the inner pot and a shoulder member that connects the storage portion to the cooker body, and A heating coil for inductively heating the inner pot is arranged at a bottom portion, a side face portion, and an upper portion of a side face of the outer pot of the outer pot, and a lid heater is provided on the lid body.

Further, the cooker main body, an outer pot which is built in the cooker main body, an inner pot which is attachable to and detachable from the outer pot, and a lid which covers the cooker main body in an openable and closable manner are provided. In the outer pot, a storage portion of the inner pot and a shoulder member that connects the storage portion to the cooker body are integrally formed of a non-metallic material, and at least a bottom portion and an upper side surface of the outer peripheral portion of the outer pot are A heating coil for inductively heating the inner pot is provided, and the lid is provided with an inner lid that is induction-heated by the heating coil provided on the upper portion of the side surface.

[0007]

Since the heating coil is arranged at the bottom, side surface and upper side of the outer pot, the inner pot is directly heated by the induction heating by each heating coil, and each part of the inner pot is evenly distributed. It is heated and does not cause uneven cooking. Since the heating coil for induction heating is arranged on the side surface of the outer pot, the outer pot can be formed integrally with the storage part of the inner pot and the shoulder member connected to the cooker body by a non-metallic material. Since the electrical insulating property is improved and the joint structure becomes an integral structure, the structure is also greatly simplified. Further, since the lid is provided with the inner lid which is induction-heated by the heating coil arranged on the upper side surface of the outer pot, it is possible to efficiently keep the temperature.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 are diagrams showing a specific configuration of an electromagnetic cooker according to the present invention. The same members as those in FIG. 3 are designated by the same reference numerals, and their functions and the like are described only in order to avoid redundant description. The inner pot 1 for containing rice is detachably housed in the cooker body 6.
The cooker main body 6 has a storage portion for the inner pot 1, and this storage portion reinforces the shoulder portion on which the protective frame bottom portion 2, the protective frame side face portion 3, and the collar portion 5 of the inner pot 1 are placed. It is configured by an outer pot 20 formed of a shoulder member 4 for connecting the material 7 and the storage portion to the cooker main body 6. Each part of the outer pot 20 is integrally formed of a non-metal material in consideration of improvement of electric insulation. The bottom heating coil 8 is arranged on the bottom 2 of the protective frame of the outer pot 20, the side heating coil 9a is arranged on the side 3 of the protection frame, and the side upper heating coil 23 is arranged on the upper side 22 of the protection frame. The inner pot 1 is U-shaped as shown in the drawing, and its outer peripheral surface is formed of a stainless steel plate so that it can be induction-heated by each heating coil 8, 9a, 23, and its inner peripheral surface has good thermal conductivity. The aluminum plate is made of a two-layer clad material, and the inner surface of the aluminum plate is treated with a fluorine resin so that the cooked product does not stick to it. A control unit 10 that controls rice cooking and heat retention is provided on a side portion of the cooker body 6.

A sensor 11 provided in contact with the inner pot 1 is for detecting the temperature of the cooked product. The cooker main body 6 is covered with a lid 12 so as to be openable and closable. The lid body 12 has a steam vent hole 1 through which steam from the inner pot 1 is released to the outside when the lid body 12 is closed.
3 is provided. In addition, the lid 12 has an inner lid 14
The inner lid 14 is detachably attached to the lid body 12, and when the lid body 12 is closed, the outer peripheral portion of the inner lid 14 is pressed against the brim portion 5 of the inner pot 1. If the inner lid 14 is formed of a metal material having an appropriate resistivity so that it can be induction-heated to an appropriate temperature by the upper side heating coil 23, the heating for keeping the temperature as shown in FIG. Even if 16 is not particularly provided, that is, it is possible even with a simple configuration as shown in FIG. However, when it is made of a material that has been generally used in the past, it is necessary to keep the temperature by the lid heater 16 as shown in FIG. Further, even when cooking rice, if the inner lid 14 is appropriately heated, the rice can be cooked evenly, that is, evenly. In the figure, 15 is a packing for preventing steam leakage, 19 is a heat insulating material for the lid 12, 18 is a heat insulating material for the cooker body 6, and 17 is a holding plate for the heating coil.

In the cooker thus constructed, when cooking rice, the bottom heating coil 8 installed mainly on the bottom 2 of the protection frame and the side heating coil 9a installed on the side 3 of the protection frame and the protection frame. The bottom portion of the inner pot 1 and its side surface and the inner lid 14 are induction-heated by the upper side heating coil 23 installed on the upper side surface 22, and the rice is cooked by these heats. The capacities of these coils are determined so that the degree of induction heating of the bottom of the inner pot 1 by the bottom heating coil 8 and the degree of induction heating of the side of the inner pot 1 by the side heating coil 9a are the same. ing. With such a structure, it becomes possible to eliminate cooking unevenness as much as possible. In addition, at the time of heat retention, the lid 12
The entire surface of the inner pot 1 is guided by the lid heating heater 16 provided on the side surface, the side heating coil 9a arranged on the side surface of the side surface portion 3 of the protective frame, and the bottom heating coil 8 installed on the bottom portion 2 of the protective frame. It will be heated.

As shown in FIG. 2, the inner lid 14 attached to the lid body 12 has a side upper heating coil 23.
When formed of a metal material having an appropriate resistivity so that it can be induction-heated to an appropriate temperature by (excluding the lid heater 16), the side surface upper heating coil provided on the protection frame side surface upper portion 22 23, the whole surface of the inner pot 1 is heated by the side surface heating coil 9a arranged on the side surface of the protective frame side surface portion 3 and the bottom portion heating coil 8 installed on the protective frame bottom portion 2. The shoulder member 4, the shoulder reinforcing material 7,
Since the protective frame side surface portion 3 having the side surface heating coil 9 and the side surface upper portion heating coil 23, and further the protective frame bottom portion 2 having the bottom portion heating coil 8 are induction heated, their thermal conductivity and heat resistance are less problematic. Therefore, all of these can be made into the outer pot 20 integrally molded with a non-metallic material. Further, when the inner lid 14 is formed of a metal material that is induction-heated by the upper side heating coil 23, the lid 12 has no electrical components, so that the lid attaching / detaching hinge portion 24 shown in FIG. It will be possible to remove 13 and wash it in its entirety.

[0012]

As is apparent from the above description, according to the present invention, since the outer pot for accommodating the inner pot is integrally formed of the non-metallic material, the electric insulation can be improved.
In addition, since the joining structure becomes an integral structure, the structure becomes very simple. Further, since the heating coil for inductively heating the inner pot is arranged at each of the outer bottom portion of the outer pot and the outer peripheral side surface portion thereof, the inner pot is directly heated by the induction heating by the heating coil. In addition, since the heating coils evenly and efficiently heat the respective parts of the inner pot by the heating coils distributed in the above positions, the uneven cooking does not occur. Further, each heating coil of the bottom part and the upper part of the side surface for inductively heating the inner pan is arranged on the outer bottom part and the outer peripheral side part of the outer pan, and
Since the lid that covers the outer pot openably and closably is provided with the inner lid that can be induction-heated by the upper side heating coil, efficient rice cooking and heat retention can be performed.
Since the lid has no electrical components, its structure is simple and can be washed in its entirety.

[Brief description of drawings]

FIG. 1 is a first configuration explanatory view of an electromagnetic cooker according to the present invention.

FIG. 2 is a second configuration explanatory view of the electromagnetic cooker according to the present invention.

FIG. 3 is a diagram showing a structure of a conventional electromagnetic cooker.

[Explanation of symbols]

 1: Inner pot 2: Protective frame bottom part 3: Protective frame side part 4: Shoulder member part 5: Inner pot collar part 6: Cooker body 7: Shoulder member reinforcing part 8: Bottom heating coil 9a: Side heating coil 10: Control Part 11: Sensor 12: Lid body 13: Vapor vent hole 14: Inner lid 15: Packing 16: Lid heater 17: Heating coil retainer plate 18, 19: Insulation material 20: Outer pot 22: Upper side surface of protective frame 23: Side surface Upper heating coil 24: Hinge part for lid removal

Claims (2)

[Claims] 1. A cooker main body, an outer pot that is installed in the cooker main body, an inner pot that can be attached to and detached from the outer pot, and a lid that covers the cooker main body so that the cooker main body can be opened and closed. In the outer pot, a storage portion of the inner pot and a shoulder member connecting the storage portion to the cooker body are integrally formed of a non-metallic material, and the outer pot has a bottom portion, a side surface portion, and a side surface upper portion. An electromagnetic cooker, wherein a heating coil for inductively heating the inner pot is provided, and a lid heating heater is provided on the lid. 2. A cooker main body, an outer pot that is installed inside the cooker main body, an inner pot that is attachable to and detachable from the outer pot, and a lid that opens and closes the cooker main body, In the outer pot, a storage portion of the inner pot and a shoulder member that connects the storage portion to the cooker body are integrally formed of a non-metallic material, and at least a bottom portion and an upper side surface of the outer peripheral portion of the outer pot are An electromagnetic cooker, wherein a heating coil for inductively heating an inner pot is provided, and the lid body is provided with an inner lid that is induction-heated by a heating coil provided at an upper portion of the side surface.