JP2002142975A - Rice cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rice cooker which can reduce not only the escaping of heat between an upper part of the body thereof and the tip part of a lid from the side part of the lid but also that especially from an inner pot with a handle in a type using the inner pot. SOLUTION: In the rice cooker which has the body thereof having an inner pot detachable therefrom and a lid openably mounted on the top surface of the body thereof, a radiation plate is detachably inside the lid while a skirt-like heat shielding member is provided at an outer circumferential end part of the radiation plate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice cooker which suppresses heat radiation from a lid side to a tip.

[0002]

2. Description of the Related Art At present, rice cookers are mostly automated from cooking to heat retention, and the process is also a water absorption process in which rice rice soaked in water in an inner pot absorbs water, and the heating temperature of the inner pot is rapidly increased. It has a wide variety of processes, including a rising cooking process, a boiling maintaining process in which the inner pot temperature is maintained at approximately 100 ° C., a steaming process after the cooking process and a heat retaining process after the steaming process, and cooks rice and rice in the most optimal state. At the same time, particularly recently, heat retention control for maintaining the condition of cooked rice for a long time has been performed.

As shown in FIG. 11, a conventional rice cooker cooks rice by heating an inner pot c containing rice by electromagnetic induction heating with a plurality of work coils b provided inside a rice cooker main body a. At the time of heat retention, a shoulder heater (see FIG. 3) provided on a shoulder member d constituting a shoulder portion is made to generate heat, and this heat is detachably attached to a lower portion of a lid e whose outer peripheral edge contacts the shoulder heater. The heat is transmitted to the heat radiating plate f to heat the rice in the inner pot c uniformly from the surroundings, thereby preventing partial dew condensation due to uneven temperature.

[0004] The plurality of work coils b and shoulder heaters are provided with a center sensor g provided at the bottom of the rice cooker.
Alternatively, the temperature in the rice cooker is detected by a sensor such as a room temperature sensor (not shown), and the rice cooking and heat retention control are performed based on the detected temperature.

[0005] In a rice cooker in which such precise control is performed, it is better that the heat escape from the rice cooker is as small as possible, and various measures have been proposed so far.

[0006]

By the way, the lid e of the rice cooker
As shown in FIG. 11, there is a type in which a heat insulating material i or the like is provided to prevent heat from escaping to the upper part. In addition, it is difficult to heat seal the space between the rice cooker main body a and the lid e only with the rice cooker that puts rice in and out by opening and closing the lid e. No effective countermeasures were taken against the escape of heat from the side j of the lid to the top of the rice cooker main body and the tip of the lid as indicated by the arrow. In addition, recently inner pot c
A handle h is provided on the left and right of the upper end opening of the rice cooker so that the inner pot c can be easily taken out. When the inner pot c is set on the rice cooker main body a, as shown in FIG. Since the shoulder heater is arranged on the shoulder member d on the upper part of the rice cooker main body, it is also housed in the recess formed in the upper part of the rice cooker main body, as shown in FIG. Since the shoulder heater could not be arranged, heat escaped easily through this portion.

The object of the present invention is to release heat from the side of the lid to the space between the top of the rice cooker body and the tip of the lid.
It is an object of the present invention to provide a rice cooker in which the use of an inner pot with a handle is particularly effective in reducing the escape of heat from that portion.

[0008]

To achieve the above object, the present invention employs the following constitution.

According to the first aspect of the present invention, there is provided a rice cooker having a rice cooker body having an inner pan detachable, and a lid openably and closably mounted on an upper surface of the rice cooker main body. A configuration in which a radiator plate is detachably attached and a skirt-shaped heat shield is provided at an outer peripheral end of the radiator plate.

With this configuration, the escape of heat from the side to the tip of the lid during rice cooking and warming can be effectively reduced by a simple configuration, and the inner pot c located near the upper part of the rice cooker main body accordingly. This suppresses a temperature decrease in the vicinity of the throttle formed in the opening of the first embodiment, and reduces dew condensation in the vicinity of the narrow portion.

[0011] The invention according to claim 2 is a rice cooker having a rice cooker body with a detachable inner pan with a handle, and a lid attached to an upper surface of the rice cooker body so as to be openable and closable. A heat radiating plate is detachably attached to the inside of the fin, and a skirt-shaped heat shielding member is provided at an outer peripheral end of the heat radiating plate located above the inner pot handle.

With this configuration, the escape of heat from the side portion to the tip portion of the lid facing the inner pot handle during rice cooking and warming can be effectively reduced by a simple configuration. In the narrow portion formed at the opening of the inner pot c located at the position, the temperature is reduced near the portion where the handle is provided, and the dew condensation near the narrow portion is reduced.

[0013] In the invention according to claim 3, the outer peripheral end face of the skirt-shaped heat shield member and the inner peripheral end face of the lid are brought close to each other, and between the outer surface of the skirt-shaped heat shield member and the inner surface of the lid. A configuration in which a heat insulating space is formed.

With this configuration, the double action of the heat insulating space and the heat shielding member effectively reduces the escape of heat from the side portion to the tip portion of the lid during rice cooking and warming with a simple configuration. Accordingly, a decrease in temperature near the throttle portion formed at the opening of the inner pot c located near the upper portion of the rice cooker main body is suppressed, and dew condensation near the throttle portion is reduced.

In the invention according to claim 4, the tip of the skirt-shaped heat shielding member is brought close to the shoulder member at the top of the rice cooker,
A configuration in which a heat insulating space is formed between an inner surface of the skirt-shaped heat shielding member and an upper surface of the shoulder member.

[0016] With this configuration, the double action of the heat insulating space and the heat shielding member extends from the side to the tip of the lid during rice cooking and heat insulation, and between the upper portion of the rice cooker main body and the peripheral edge of the tip of the lid. The heat dissipation from the heat is effectively reduced by a simple structure, and the heat is escaped by the triple action of the heat shielding member and the two heat insulating spaces formed above and below the heat shielding member in the method recited in claim 3. Accordingly, a decrease in the temperature near the throttle formed in the opening of the inner pot c near the upper part of the rice cooker body is suppressed, and the dew condensation near the throttle is reduced.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (Embodiment 1) FIGS.
FIG. 1 is an overall sectional view of a rice cooker, FIG. 2 is an enlarged sectional view of a main part, FIG. 3 is an enlarged perspective view of an upper portion of a rice cooker main body, and FIG. FIG. 5 is a plan view of the plate, and FIG. 5 is a cross-sectional view taken along line AA of FIG. 4. The rice cooker 1 includes a rice cooker main body 2 and a lid unit 3.

The rice cooker main body 2 is composed of a synthetic resin bottomed cylindrical inner case 5 in which the inner pan 4 can be set, and a synthetic resin outer case 6 which is an outer casing for holding the inner case 5. The two cases 5 and 6 are formed and connected by means such as screws (not shown).

On the outer peripheral surface of the inner case 5, a bottom portion,
A bottom coil 7a, a corner coil 7b and a side coil 7c composed of a work coil are respectively disposed at a corner portion and a side portion from the bottom portion to the side surface. The current control described above is performed, and a heater 8 for heat retention attached by an adhesive tape or the like is disposed above the side surface of the outer peripheral surface of the inner case 5, and the power supply is controlled by the control device at the same time. Reference numeral 9 denotes a heat insulating material provided on the outer periphery of the heater to increase the heat retaining efficiency.

The coils 7a, 7b, 7c are arranged on the coil base 10, and a through hole is provided at the center of the coil base 10 so as to penetrate vertically. A reed switch for detecting the set state of the inner pan 4 and a center sensor 11 in which a thermistor for detecting the temperature of the inner pan 4 are provided.

The center sensor 11 has a built-in spring, and when the inner pot 4 is not set, the tip protrudes above the bottom of the inner case 5 and when the inner pot 4 is set, A safety device is formed which is pushed down while being in contact with the bottom outer surface of the inner pot 4 and is activated by the reed switch, but which does not operate unless the inner pot 4 is set.

The inner pot 4 is provided with the work coil 7.
a, 7b, and 7c are formed from an iron-based metal such as stainless steel capable of self-heating by eddy currents induced therein, and have a substantially W-shaped cross section, which is substantially the same shape as the inner case 5. When the inner pan 4 is set in the inner case 5, the center sensor 11 is turned on, and the coil 7 is turned on.
The inner pot 4 is heated by Joule heat caused by the eddy currents, and the contents such as cooked rice and the like put therein are evenly heated and cooked efficiently.

Further, the upper end of the inner pan 4 is formed with a narrowed portion 4a over the entire circumference thereof, and by reducing the diameter of the opening at the top portion, the heat dissipation loss, which is the escape of heat to the upper portion, is reduced. The cross-sectional shape of the pot 4 is substantially circular, and the handles 12,
12 are provided.

A synthetic resin ring-shaped shoulder member 13 having a substantially L-shaped cross section is provided on the upper portion of the outer case 6, and the shoulder member 13 is And a plurality of not-shown locking holes or locking pieces provided in the inner case 5 and the outer case 6 are forcibly fitted. It is firmly fixed by the fixing means.

As shown in FIG. 3, the shoulder member 13 has a depth substantially equal to the thickness of the handle 12 of the inner pan 4 at a symmetrical position as shown in FIG. 37
Are formed, and the handle 12 of the inner pan 4 is formed in the recess 37.
Is set so that the height of the upper portion of the shoulder member 13 and the opening of the upper end of the inner pot 4 are substantially the same when fitted.
The outer side surface portion 13a of the recess 37 has a curved surface shape, and a finger can be put under the handle 12 when the inner pot is taken out by holding the inner pot after the inner pot is stored, so that the inner pot can be easily taken out.

Numeral 25 shown in FIG. 3 is a shoulder heater disposed on the upper surface of the shoulder member 13, which is cooked from the upper portion of the inner pot through a heat sink which is detachably attached to the inside of the lid when the lid is closed. Heat. As is clear from FIG. 3, the shoulder heater 25 is cut at a concave portion 37 into which the handle 12 of the inner pot 4 is fitted, and has a shape of two substantially semicircles as a whole.

Reference numeral 3 denotes a lid unit attached to the upper part of the rice cooker main body 2, which comprises an outer cover 14, an inner cover 15, a heat insulating material 16, a heat radiating plate 18, and the like. An outer peripheral surface of the lid unit 3 made of resin is formed, and the inside of the heat insulating material 16 is sandwiched by a known fixing means of forcibly fitting the inner cover 15 with a plurality of locking holes (not shown) and locking pieces inside the lid unit 3. As a result, the inner pot 4 is securely fixed, and the escape of heat to the upper opening end of the inner pot 4 is reduced.

At the center of the outer cover 14, there is provided a fitting hole 17 in which a pressure adjusting unit 19 is detachably mounted.
A fitting tube 23 that is detachable from the fitting hole 17 is attached to the center upper portion of the heat radiating plate 18 provided inside the inner cover 15 by caulking a rivet 24.
By mounting the fitting tube 23 in the fitting hole 17, the heat radiating plate 18 is integrally connected to the lid unit 3. The heat radiating plate 18 is made of a disk-shaped thin plate and has a size to completely cover the opening of the inner pan 4, and when the lid is closed, its outer peripheral end has two substantially semi-arc shaped shoulder heaters 25 shown in FIG. , 25
Is heated by the shoulder heaters 25, 25 and efficiently cooks and keeps rice from above the inner pot 4. Further, the pressure adjusting unit 19 includes a cylindrical unit main body 26, a ball valve 20 disposed in the unit main body 26, a pressure adjusting cap 21 covering an upper portion of the unit main body 26, and the like. When the internal steam pressure becomes equal to or higher than a predetermined value, the steam is pushed up, and excess steam is discharged to the outside through a plurality of steam outlets 22 provided in the pressure regulating cap 21.

A bed 27 is formed in the cylindrical unit main body 26. The bed introduced into the unit main body 26 together with the steam is stored in the bed 27, and is accumulated for a predetermined amount or more. Then, the rubber-like discharge valve 29 disposed at the bottom is pushed open, and is returned into the inner pan 4 through the hole 28.

The lid unit 3 is provided with a hinge mechanism (not shown) made of synthetic resin. The hinge unit is detachably connected to the lid unit when the lid is opened. Making it possible. The lid may not be detachable for the present invention.

As described above, the heat radiating plate 18 is detachable from the lid unit 3. However, when the outer cover 14 and the inner cover 15 forming the lid unit 3 are integrated, a ring-shaped The first seal packing 31 is integrally held with the projection 31a formed on the base end thereof engaged with the recess 14c formed on the inner surface of the outer cover 14, and the heat radiation plate 18 is When mounted on the heat sink 18, the distal end 31 b of the first seal packing 31
A heat insulation space S1 is formed between the inner cover 15 and the heat sink 18.

The heat radiating plate 18 has a concave portion 18a having an inverted U-shaped cross section formed at an outer peripheral end portion, and a base end portion 32a of a ring-shaped second seal packing 32 is fitted on an inner surface thereof. When the lid is closed, the tip portion 32b of the second seal packing 32
Abuts on the top of the squeezed portion 4 a of the inner pan 4 to seal the inside of the inner pan 4.

The outer peripheral end of the depression 18a of the heat radiating plate 18 is formed in a stepped shape including a first horizontal portion 18b lower than the depression 18a and a second horizontal portion 18c lower than the first horizontal portion 18b. The lower surface of the two-stage horizontal portion 18c is in contact with the upper surface of the shoulder heater 25 shown in FIG. 3, and a heat shield 30 is disposed on the upper surface of the first-stage horizontal portion 18b.

The heat shielding member 30 is formed of a resin such as polypropylene or polysulfone, or a heat-resistant material such as aluminum, stainless steel, ceramics, or the like, and has a skirt shape having a substantially horizontal base end 30a and a substantially vertical tip 30b. The substantially horizontal base end portion 30a is placed on the upper surface of the first-stage horizontal portion 18b, and is caulked with rivets 33, so that the heat shielding member 30 is easily and reliably attached. FIG. 4 shows a plan view and a cross section of the heat sink 18 respectively.
And FIG.

A substantially vertical tip portion 30 of the heat shielding member 30
The outer peripheral surface of the outer cover b is suspended in a state of being close to the inner peripheral surface of a substantially vertical outer cover tip portion 14c following the outer cover side portion 14b, and the tip portion extends to near the upper surface of the shoulder member 12, and A heat insulating space S2 is formed by the cover 14, the heat shielding member 30, and the first seal packing 31 (in the case where the first seal packing 31 is not provided, one heat insulating space is formed by the heat insulating spaces S1 and S2). Along with)
A heat insulating space S3 is also formed between the heat shielding member 30 and the shoulder member 12, and the outer cover side portion 14b, the outer cover tip portion 14c, and rice cooked by the triple effect of the heat shielding member 30, the heat insulating space S2, and the heat insulating space S3. Efficiently reduces the escape of heat from between the upper part of the container body and the peripheral edge of the lid.

The tip of the substantially vertical tip 30b of the heat shielding member 30 does not have to extend to near the upper surface of the shoulder member 12 or near the inner peripheral surface of the outer cover tip 14c, and may be inclined. The shape may be a curved shape, and any shape may be used as long as at least the escape of heat from the vicinity of the side surface of the lid is reduced. Of course, the tip of the substantially vertical tip 30b of the heat shield member 30 is the shoulder member 1
2 does not extend to the vicinity of the upper surface of the outer cover 2 or to the vicinity of the inner peripheral surface of the outer cover tip 14c, the heat insulating spaces S2 and S3 are not formed, but the tip of the tip 30b extends to the vicinity of the upper surface of the shoulder member 12. Although not shown, if it extends to the vicinity of the inner peripheral surface of the outer cover front end portion 14c, the heat insulating space S2 is formed, and it may be of course. Further, the heat shielding member 30 has been described as being separate from the heat radiating plate 18, but the outer peripheral end of the heat radiating plate 18 is extended,
The extension may be integrally formed with the same shape as the shape of the heat shielding member 30.

Further, there is not much room in which the heat-insulating member 30 is disposed, and if the thickness of the heat-insulating member 30 is increased, the thickness of the lid must be reduced or the shape of the lid must be increased. Although the thickness of the heat shielding member 30 is made thinner than the thickness of the lid in the case of the above, it may be reversed. Also, in view of the fact that there is not much room for the heat shield member 30 to be arranged, the heat shield member 30 must be larger than the shoulder member 12 if it protrudes outside the shoulder member 12. To be provided.

(Embodiment 2) FIGS. 6 to 9 show another embodiment of the heat shielding member, and FIG. 6 is a plan view of a heat sink. FIG. 7 shows FIG.
BB sectional drawing of FIG. FIG. 8 is a plan view of a heat sink according to still another embodiment. FIG. 9 is a sectional view taken along the line CC of FIG. This embodiment is the same as that of the first embodiment except for the heat shielding member, and the same figure number is used for the corresponding part, so that the details of that part are the same as those of the first embodiment. I do.

This embodiment is applicable to a rice cooker in which the inner pan 4 is provided with a handle 12, and the inner pan 4 is provided with a handle 1.
As shown in FIG. 3, in the rice cooker provided with the handle 2, the shoulder heater 25 cannot be disposed in the recess 37 into which the handle 12 is fitted, so that a skirt-shaped heat shield covering the upper portion of the recess 37 is provided. The members 30 are mounted on the left and right sides of the heat radiating plate 18. In other words, the components arranged on the entire circumference of the heat radiating plate 18 shown in FIGS. 4 and 5 are cut away except for the recess 37.

Since the heat radiating plate 18 can be freely attached to and detached from the fitting hole 17 formed at the center of the lid unit 3 through the fitting tube 23 at any angle position, FIG.
In FIG. 5, there was no problem with mounting at any angle position, but in this embodiment, the heat shielding member 30 is
There is no meaning unless it comes to the upper part of the frame, and positioning means therefor is provided.

The positioning means is provided with a projection 40 extending vertically on the inner wall of a fitting tube 23 provided at the center of the heat radiating plate 18 and a pressure adjusting unit 19 fitted into the fitting tube 23.
The unit main body 26 is provided with a groove (not shown) in which the projection 40 is fitted. By fitting the groove into the projection 40, the heat shielding member 30 is always inserted when the radiator plate 18 is inserted into the lid unit 3. Is positioned on the recess 37.

By adopting such a shape, the heat shield member 30 can be used with a minimum necessary, the cost can be reduced, and the shoulder member 13 without the shoulder heater 25 can be concentrated. 4 and 5, a heat shield effect comparable to that of FIGS. 4 and 5 can be obtained.

However, if such a heat shielding member 30 is used, the heat insulating space S2 shown in FIG. 2 cannot be formed, and the disadvantage is compensated for in FIGS. 8 and 9.

The ribs 41 and 42 are provided on both sides and an arc-shaped base end of the heat shielding member 30 shown in FIGS. 6 and 7, respectively.
The ribs 41 and 42 form a heat insulating space S2 between the lid and the heat shielding member 30 to further improve the heat shielding effect.

FIG. 10 shows still another embodiment of the heat-shielding member. The tip 30b of the heat-shielding member 30 is formed in an inclined shape while the one shown in FIG. In addition, with such a configuration, the volume of the heat insulating space S2 formed between the lid and the heat shielding member 30 can be increased, and the heat shielding effect can be further improved. When this shape is applied as shown in FIGS. 6 and 7, the ribs 41 and 42 shown in FIGS.
Need not be used, but it is of course necessary to form the heat insulating space S2.

6 to 10, similarly to the first embodiment, the tip of the substantially vertical tip 30b of the heat shielding member 30 is located near the upper surface of the shoulder member 12 or at the tip of the outer cover tip 14c. It does not need to extend to the vicinity of the inner peripheral surface, may be inclined, may have a curved shape, and at least what shape can reduce the escape of heat from near the side surface of the lid May be something. Of course, if the tip of the substantially vertical tip 30b of the heat shielding member 30 does not extend to near the upper surface of the shoulder member 12 or near the inner peripheral surface of the outer cover tip 14c, the heat insulating spaces S2 and S3 are not formed. Needless to say, if the tip of the tip portion 30b does not extend to the vicinity of the upper surface of the shoulder member 12, but extends to the vicinity of the inner peripheral surface of the outer cover tip portion 14c, the heat insulating space S2 is formed. It may be. Although the heat shield member 30 has been described as being separate from the heat radiating plate 18, the outer peripheral end of the heat radiating plate 18 is extended, and the extended portion is formed into a shape similar to the shape of the heat shield member 30. May be formed.

Further, there is not much room in which the heat shielding member 30 is arranged, and if the thickness of the heat shielding member 30 is increased, the thickness of the lid must be reduced or the shape of the lid must be increased. Although the thickness of the heat shielding member 30 is made thinner than the thickness of the lid in the case of the above, it may be reversed. Also, in view of the fact that there is not much room for the heat shield member 30 to be arranged, the heat shield member 30 must be larger than the shoulder member 12 if it protrudes outside the shoulder member 12. To be provided.

The present invention is not limited to the configuration of the above-described embodiment, and it is needless to say that the design can be appropriately changed without departing from the gist of the invention.

[0049]

According to the first aspect of the present invention, there is provided a rice cooker having a rice cooker body having an inner pan detachable, and a lid openably and closably mounted on an upper surface of the rice cooker main body. A heat sink is detachably attached to the inside, and a skirt-shaped heat shield is provided at the outer peripheral end of the heat sink to easily release heat from the side to the tip of the lid during rice cooking and warming. With such a configuration, the power consumption can be effectively reduced, and the power consumption can be reduced accordingly.
Further, since a temperature decrease near the throttle portion formed at the opening of the inner pot c located near the upper portion of the rice cooker main body can be suppressed, dew condensation near the throttle portion can be reduced.

In the invention according to claim 2, there is provided a rice cooker having a rice cooker body with a detachable inner pan with a handle, and a lid openably and closably mounted on an upper surface of the rice cooker main body. A radiator plate is detachably attached to the inside of the inner pan, and a skirt-shaped heat shielding member is provided at an outer peripheral end of the radiator plate located above the inner pan handle, so that the inner pan handle during rice cooking and warming is maintained. The escape of heat from the side part to the tip part of the lid opposed to the above can be effectively reduced by a simple configuration, and the power consumption can be reduced accordingly. Further, it is possible to suppress a decrease in temperature near a portion where a handle is provided in an aperture portion formed at an opening of the inner pot c located near an upper portion of the rice cooker main body, so that dew condensation near the aperture portion is reduced. be able to.

According to the third aspect of the present invention, the outer peripheral end surface of the skirt-shaped heat shield member and the inner peripheral end surface of the lid are brought close to each other, and the gap between the outer surface of the skirt-shaped heat shield member and the inner surface of the lid is formed. By forming the heat-insulating space, the double action of the heat-insulating space and the heat-insulating member can effectively reduce the escape of heat from the side portion to the tip portion of the lid during cooking and keeping the temperature warm by a simple configuration. Power consumption can be reduced. Further, since a temperature decrease near the throttle portion formed at the opening of the inner pot c located near the upper portion of the rice cooker main body can be suppressed, dew condensation near the throttle portion can be reduced.

In the invention according to claim 4, the tip of the skirt-shaped heat shielding member is brought close to the shoulder member at the top of the rice cooker,
By forming a heat-insulating space between the inner surface of the skirt-shaped heat-insulating member and the upper surface of the shoulder member, the double action of the heat-insulating space and the heat-insulating member allows the side portion of the lid to cook rice and keep warm. And from the top of the rice cooker and between the top of the rice cooker and the peripheral edge of the lid can be effectively reduced by a simple configuration. With the triple action of the two heat-insulating spaces formed above and below the heat-insulating member, the escape of heat can be further increased, and the use of power consumption can be reduced accordingly. Further, since a temperature decrease near the throttle portion formed at the opening of the inner pot c located near the upper portion of the rice cooker main body can be suppressed, dew condensation near the throttle portion can be reduced.

[Brief description of the drawings]

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

FIG. 2 is an enlarged sectional view of a main part of the present invention.

FIG. 3 is an enlarged perspective view of the upper part of the rice cooker main body.

FIG. 4 is a plan view of a heat radiating plate to which the heat shielding member of the present invention is attached.

FIG. 5 is a sectional view taken along line AA of FIG. 4;

FIG. 6 is a plan view of a heat radiating plate of another embodiment to which the heat shielding member of the present invention is attached.

FIG. 7 is a sectional view taken along line BB of FIG. 6;

FIG. 8 is a plan view of a heat sink according to still another embodiment to which the heat shielding member of the present invention is attached.

FIG. 9 is a sectional view taken along the line CC of FIG. 8;

FIG. 10 is an enlarged sectional view of a main part of still another embodiment of the present invention.

FIG. 11 is a sectional view of a conventional rice cooker.

[Explanation of symbols]

 2 Rice Cooker Main Body 3 Lid Unit 4 Inner Pan 12 Handle 13 Shoulder Member 17 Fitting Hole 18 Heat Sink 19 Pressure Adjusting Unit 23 Fitting Cylinder 24, 33 Rivets 25 Shoulder Heater 26 Unit Main Body 30 Heat Insulating Member 31 First Seal Packing 32 Second seal packing 37 Depressed portions 41, 42 Rib 4a Restricted portion S1, S2, S3 Insulated space 14b Outer cover side portion 14c Outer cover tip portion 18b First-stage horizontal portion 18c Second-stage horizontal portion

Claims (4)

[Claims] 1. A rice cooker having a rice cooker body with an inner pan made detachable, and a lid attached to the upper surface of the rice cooker body so as to be openable and closable, wherein a heat sink is detachably mounted inside the lid. A rice cooker, wherein the rice cooker is mounted and a skirt-shaped heat shielding member is provided at an outer peripheral end of the heat sink. 2. A rice cooker having a rice cooker main body with an inner pan with a handle detachable and a lid openably and closably mounted on an upper surface of the rice cooker main body, wherein a heat sink is provided inside the lid. A rice cooker which is detachably mounted, and further comprises a skirt-shaped heat shielding member provided at an outer peripheral end of the heat sink located above the inner pot handle. 3. The heat insulating space is formed between the outer surface of the skirt-shaped heat shielding member and the inner surface of the lid by bringing the outer peripheral end surface of the skirt-shaped heat shielding member and the inner peripheral end surface of the lid close to each other. The rice cooker according to claim 1, wherein 4. A heat insulating space is formed between an inner surface of the skirt-shaped heat insulating member and an upper surface of the shoulder member by bringing a tip end of the skirt-shaped heat insulating member close to a shoulder member at an upper part of the rice cooker. The rice cooker according to any one of claims 1 to 3, wherein