JPH1156610A - rice cooker - Google Patents

Abstract

(57) [Summary] [Problem] To make the whole body compact. SOLUTION: A lid 47 covering an upper part of a main body 31, and an inner pot 35 with a flange removably stored in the main body 31 are provided.
A pot packing 93 abutting on a flange surface of the inner pot below the lid; and a heat sink 48 in an inner circumferential direction of the pot packing, the heat sink protruding below the flange surface at the inner pot opening. And a gap between the outer peripheral edge of the protrusion and the side surface of the inner pot is arranged close to 5 mm or less.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice cooker used for general household or business use.

[0002]

2. Description of the Related Art Conventionally, this type of rice cooker is, for example, shown in FIG.
The configuration was as shown in FIG. In the figure, reference numeral 1 denotes a cylindrical body having an open upper surface.
A protection frame 2 serving as an inner pot storage portion is provided, and the protection frame 2 is formed of a non-metallic material into a bottomed cylindrical shape.
Is engaged with the inside of the upper end of the body 1.

[0003] Reference numeral 3 denotes an inner pot in which a flange 4 protruding outward is formed at an upper end opening.
By being placed in a suspended state on the upper surface of the protective frame 3, the protective frame 2 is detachably disposed in the protective frame 2. An induction coil 5 is provided outside the protection frame 2, and the induction coil 5 is formed of a heat-resistant resin material on a lower portion of the outer circumference of the protection frame 2 so that the distance to the outer peripheral surface of the inner pot 3 is constant. It is supported by the formed coil cover 6.

[0004] Reference numeral 7 denotes an outer cover made of a synthetic resin, and the outer cover 7 is rotatably supported via a pin 9 on a hinge member 8 integrally formed on an upper portion of an upper frame 23. 10 is an inner cover,
The inner cover 10 is fixed to the inner surface of the outer lid 7. A heat radiating plate 11 as a heating element is fixed to the inner cover 10, and an induction coil 12 supported by a coil support 13 is located above the heat radiating plate 11. The heat radiation plate 11 generates heat by the electromagnetic action of the induction coil 12. Further, a sensor 14 for detecting the temperature of the heat radiating plate 11 is directly attached to the heat radiating plate 11 with an aluminum tape, and the temperature of the heat radiating plate 11 is adjusted.

An engaging member 16 is located on the opposite side of the hinge member 8 and is integrally formed on the upper end of the protective frame 2. An engaging lever 17 is provided on the outer lid 7 so as to face the engaging member 16. Is instructed to be rotatable via a pin 18. When the outer lid is closed, the pot packing 20 presses against the flange 4 of the inner pot 3 to seal the inner pot 3.

Reference numeral 24 denotes a steam cylinder, which prevents squirt from leaking outside. Reference numeral 25 denotes a control board, which controls input and output of the current to the induction coil 12 and signals of the operation display unit 26. A cooling fan 27 cools the control board 25 and the induction coil 5.

[0007]

However, in the above-mentioned rice cooker, the size of the body of the rice cooker relative to the inner pan is large, the portability is poor, and the installability is poor. If the difference is large, there is a problem that the heat retention performance is reduced. SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to realize a rice cooker having a compact structure.

[0008]

In order to solve the above-mentioned problems, the present invention provides a main body, an inner pan with a flange removably housed in the main body, a lid for covering an upper part of the main body,
A heat sink for heating the heat sink inside the lid; a heat sink for heating the heat sink inside the heat sink; The plate has a surface protruding below the flange surface at the upper end opening of the inner pan, and a gap between the protruding outer peripheral edge and the side surface of the inner pan is set to be close to 5 mm or less.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 comprises a main body,
An inner pan with a flange removably housed in the main body, a lid covering an upper portion of the main body, and a pan packing abutting on a flange surface of the inner pan below the lid; A heat radiating plate, and a heating means for heating the heat radiating plate in the lid, wherein the heat radiating plate has a surface projecting below a flange surface at an upper end opening of the inner pan, and a projecting outer peripheral edge portion. By arranging the gap on the side of the inner pan close to 5 mm or less, the space inside the lid can be dramatically expanded, the rice cooker main body can be made compact, and the installation and portability are improved. Can be improved. Furthermore, the heat retention performance can be improved by reducing the temperature difference between the outer peripheral portion of the heat sink and the side surface of the inner pan.

According to a second aspect of the present invention, the heat radiating plate is disposed so as to form a substantially vertical surface in the vicinity of the inner peripheral portion of the pot packing, so that when the lid is opened, the flow path of the dew dripping from the upper portion of the heat radiating plate is formed. It is possible to follow the packing and to reduce the amount of dew dropping on the heat radiating plate flat part, thereby obtaining a visual effect of giving a clean feeling. According to a third aspect of the present invention, the pot packing is in contact with the lower surface of the lid above the radiator plate, and is disposed so as to form a substantially airtight space between the lower surface of the lid and the radiator plate, thereby improving the heat insulating effect of the lid portion. And the heat retention performance can be improved.

[0011]

【Example】

(Embodiment 1) A first embodiment of the present invention will be described with reference to FIGS. As disclosed in the figure, the feature of the present invention is to reduce the thickness of the lid, thereby realizing the compactness of the main body, and in particular, to improve the heat insulation effect at the time of heat insulation, and to improve the heat insulation performance. It is ingenious. The ingenuity will be described in order.

A description will now be given of handling of an operation board, a heating board, and the like which are conventionally arranged on the front and bottom portions of the main body. Conventionally, the spatial distance of the bottom of the main body has been indispensable to avoid unnecessary heating of the rice cooker mounting portion as described above. Therefore, such a space portion is used as a place for mounting an operation board for enabling a front operation, and the like.
By arranging the parts around the lower part of the lid and hinge of the main body, the space on the front part of the main body becomes unnecessary,
In addition, the space in the lower part of the hinge part and the inside of the lid can be effectively used, and the front part and the bottom part of the main body can be made compact.

However, in order to dispose the operation board 46 inside the lid 47, there are the following problems. First, a cover coil 49 for heating a detachable radiator plate 48 provided on the lower surface of the cover 47 is provided inside the cover 47, and it is necessary to have a structure that is hardly affected by a magnetic field due to the cover coil 49. was there. Further, since it is necessary to dispose the steam cylinder 50, the lid sensor 51, and the like inside the lid 47, it is necessary to restrict an arrangement place and to suppress an unnecessary increase in the weight of the lid 47. .

Further, since the temperature difference between the heat sink 48 and the inner pot 35 during the heat retention causes dew condensation, the heat retention performance is reduced.
It was necessary to heat the heat sink 48 and the inner pot 35 equally.
In order to solve the above problem, first, the lid ferrite 52 is arranged near the lower part of the microcomputer or the IC arranged on the operation board 46 to reduce the influence of the magnetic field on the microcomputer or the IC of the lid coil 49. . In addition, as a method of arranging the lid ferrite 52, what was conventionally arranged radially in the longitudinal direction with respect to the lid coil 49 as shown in FIG.
As shown in the figure, along with the lid coil 49,
The number of the lid ferrites 52 is reduced from six to three. This focuses on the area covered by the lid ferrite 52 in the circumferential direction. Since one strip-shaped lid ferrite 52 is about three times as long in the vertical direction as in the horizontal direction, the number of pieces is reduced by half. Even if it is reduced, the cover range in the circumferential direction of the cover coil 49 increases, so that it is possible to obtain an effect of the same performance or more with about half of the conventional cover ferrite 52. With such a configuration, the influence of the magnetic field in the circumferential direction can be reduced as compared with the related art, and the weight of the lid 47 can be suppressed from increasing.

Next, by disposing the heat radiating plate 48 so as to protrude below the flange portion of the inner pan 35, a vertical space inside the lid can be secured, and the operation board 46 disposed inside the lid 47 can be secured. The lid sensor 51 can be provided immediately below the lid 47, and the space inside the lid 47 can be effectively used, and the design can be performed in consideration of the assembling property.

Further, by disposing the heat radiating plate 48 from the flange surface at the upper end opening of the inner pot 35 and disposing the distance between the protruding outer peripheral portion and the side surface of the inner pot 35 close to 5 mm or less, the heat radiating plate 48 is provided. Thereby, the upper end opening of the inner pan 35 can be heated, and the diffusion loss of heat from the outer peripheral portion of the heat sink 48 and the upper end of the inner pan 35 can be reduced, so that the heat retaining performance can be remarkably improved.

A specific configuration will be described below. A detachable heat radiating plate 48 is provided inside the lid 47. This is designed to be detachable so that the user of the rice cooker can always use the rice cooker while keeping the cleanliness, and can easily wash the whole rice cooker. However, such heat sink 4
If the rice is cooked with the rice cooker 8 removed, satisfactory rice cooking performance cannot be obtained. Therefore, it is necessary to detect whether or not the heat sink 48 is securely attached. In recent rice cookers, the inner pot 3 is used to improve the rice cooking performance.
Means for detecting the temperature inside 5 and estimating the rice cooking state from the temperature is adopted, and the lid sensor 51 has such a function as well.

The cover sensor 51 is urged downward by a sensor spring 53 so as to contact the heat radiating plate 48. At the same time, by surrounding the cover thermistor 4 with aluminum or the like, the magnetic field generated by the cover coil 49 is reduced. Avoiding the effects.
In addition, since the lid sensor 51 does not apply a large load to the lid sensor 51 itself, the strength and the like of the sensor spring 53 can be suppressed low, and the lid sensor 51 can be made compact. On the other hand, in order to prevent vapor or the like from entering the inside of the lid 47, it is necessary to provide a packing 55 around the lid sensor 51 to ensure the sealing performance of the part.

The center of the bottom surface of the cylindrical shape of the lid sensor 51 is depressed. This is to improve the temperature detection performance by pressing the entire bottom surface portion against the heat sink 48. Also, for this purpose, the cylindrical lid sensor 51 itself does not force the left and right axes of the lid sensor 51 to move horizontally when moving up and down, so that it can cope with a slight inclination of the heat sink, and The configuration is such that the periphery of the depression is provided on the heat sink 48 at three points.

As shown in FIG. 4, when the heat radiating plate 48 is mounted on the lid 47, the lid sensor 51 is pushed upward, but the upward movement causes the lid sensor 51 to move upward.
The magnet 56 attached to a part of the cylindrical portion
Is recognized by the reed switch 57 or the like, and the mounting of the heat sink 48 can be confirmed. Here, by integrally placing the lid sensor 51 on the mounting unit 58 of the operation board 46, the operation board 46 and the lid sensor 51 can be handled as a unit, and the assembling property is improved. In addition to the assemblability, by disposing the lid sensor 51 below the operation board 46, the signal line from the lid thermistor 54 can be shortened, and noise is easily superimposed on the signal line. Can be avoided.

In order to prevent the inside of the lid 47 from becoming excessively hot, the operation board 46 should not be provided with heat-generating components such as a triac, and a lid thermistor 54 should be arranged directly below the operation board 46. By doing so, the temperature of the heat radiating plate 48 can be detected, and it can be directly detected whether the temperature has reached a level that adversely affects the operation board 46.

In this embodiment, the detection of the mounting state of the heat radiating plate 48 is performed by the magnet 5 linked to the vertical movement of the lid sensor 51.
Although 6 and the like are used, the present invention is not limited to this embodiment. For example, it is also possible to detect by a heat sink magnet 58 installed on the heat sink 48. In addition, while pursuing design by making the upper part of the lid 47 a flat structure, it is necessary to prevent a spoon or the like from being heated due to being heated when an object such as a spoon is erroneously placed in such a place by mistake. There is. Therefore, a magnetic shield 59 made of aluminum or the like is provided above the lid coil 49 inside the lid 47.

In this embodiment, the detachable heat sink 4
A case has been described where 8 is induction-heated by the lid coil 49. However, a similar effect can be expected when the radiator plate 48 is fixed and cannot be attached or detached, or when the heater of the radiator plate 48 is a heater wire. . (Embodiment 2) Next, FIG.
This will be described with reference to FIG. The pot packing forms a substantially closed space between the heat sink 48 and the lower surface of the lid 47 in order to enhance the heat insulating effect of the lid.

Specifically, a heating plate 94 is arranged on the lower surface of the lid 47, a heater 95 is adhered to the heating plate 94 in close contact, and a radiator plate 48 is arranged below the heating plate 94. The pot packing 93 is engaged with the outer peripheral edge of the heat sink 48, and the pot packing 93 abuts on the inner pot 35 flange portion,
In addition, the heating plate 94 is disposed so as to contact the outer peripheral edge. This is because in the process in which the heater 95 generates heat, the heating plate 94 is heated, and the radiator plate 48 is further heated, the air layer interposed between the heating plate 94 and the radiator plate 48 exchanges heat with the outside air by convection. Serves to prevent

As for the configuration of the pot packing 93 and the like, for example, if a lid coil is used instead of the heater 95, the heating plate 94 can be made of a resin material, and the same effect in that case can be obtained. can get. Further, when the pot packing 93 is divided into upper and lower parts to form separate parts,
The same effect can be obtained by disposing a packing or the like so as to abut on the heat radiating plate 48 from a component disposed above the upper part 8.

[0026]

As described above, according to the first aspect of the present invention, a main body, an inner pan with a flange removably stored in the main body, a lid for covering an upper portion of the main body, and the lid A pot packing is provided below and in contact with the flange surface of the inner pot, a heat sink is provided in the pot packing inner circumferential direction, and a heating means for heating the heat sink is provided in the lid. By having a surface projecting downward from the flange surface at the upper end opening of the inner pan, and disposing the protruding outside close to the side surface of the inner pan, the space inside the lid can be greatly expanded. In addition, the rice cooker main body can be made compact, and the installability and portability can be improved. In particular, the temperature difference between the outer peripheral portion of the heat sink and the side surface of the inner pan can be reduced, and the heat retaining effect can be improved.

According to the second aspect of the present invention, the heat radiating plate is disposed so as to form a substantially vertical surface near the inner peripheral edge of the pot packing, so that when the lid is opened, the dew drops from the upper portion of the heat radiating plate. Can be arranged along the vicinity of the pot packing, the dew dropping on the flat part of the heat sink is reduced, and the visual effect of giving a clean feeling can be obtained. According to the third aspect of the present invention, the pot packing is in contact with the lower surface of the lid above the radiator plate, and is disposed so as to form a substantially airtight space between the lower surface of the lid and the radiator plate. The effect can be improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a main part of a rice cooker according to a first embodiment of the present invention.

FIG. 2 is a schematic diagram of a lid coil of the rice cooker.

FIG. 3 is a fragmentary sectional view of the rice cooker.

FIG. 4 is a sectional view of an essential part of the lid of the rice cooker.

FIG. 5 is a fragmentary sectional view of the rice cooker.

FIG. 6 is a sectional view of a main part of a rice cooker according to a second embodiment of the present invention.

FIG. 7 is a schematic diagram of a conventional rice cooker lid coil.

FIG. 8 is a vertical sectional view of a main part of the rice cooker.

[Explanation of symbols]

 31 body 35 inner pot 47 lid 48 heat sink 93 pot packing

Claims (3)

[Claims] 1. A main body, an inner pan with a flange removably housed in the main body, and a lid covering an upper part of the main body,
A heat sink for heating the heat sink inside the lid; a heat sink for heating the heat sink inside the heat sink; A rice cooker in which the plate has a surface projecting below the flange surface at the upper end opening of the inner pan, and a gap between the protruding outer peripheral portion and the side surface of the inner pan is close to 5 mm or less. 2. The rice cooker according to claim 1, wherein the heat radiating plate is disposed so as to form a substantially vertical surface near the inner peripheral edge of the pot packing. 3. The rice cooker according to claim 1, wherein the pot packing is in contact with the lower surface of the lid above the radiator plate, and is disposed so as to form a substantially airtight space between the lower surface of the lid and the radiator plate.