JP2002010905A - Heat insulating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat insulating cooker which can lessen dew condensation to the upper part at the circumference of the inner surface of the cooker and can prevent cooked rice from having excessive moisture. SOLUTION: A main body facing the spacing between a lid 26 and a main body 1 is internally provided with a heating means 51 consisting of a cord heater 53 or the like so as to project from the top surface of the main body 1. The heating means 51 is covered by a flange 15 at the top end of the cooker 11 and a recessed part 15 formed on the under surface of the flange 14 is placed atop the heating means 51 in a state having substantially no clearances. A lid gasket 37 disposed on the under surface of the lid 26 abuts the top surface of the flange 14. The heating means 51 is made to generate heat during the heat insulation including the period until the temperature of the cooked rice in the cooker 11 after rice cooking falls down to a heat-retention temperature and in the period when the cooked rice in the cooker 11 is temporarily reheated during the heat retention.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice cooker for cooking rice and for keeping the temperature after the rice cooking.

[0002]

Conventionally, there has been known an insulated pot in which after the rice in the pot is cooked, the temperature of the rice is lowered to the heat retaining temperature and the process automatically shifts to the heat retaining. In this type of heating pot, moisture is condensed around the inner surface of the pot, which is a container during the heat retention, and when the condensed water flows down the rice inside the pot (pot skin), the rice becomes over-moistured and tastes good. Therefore, it is a technical problem to reduce the dew condensation around the inner surface of the pot during the heat retention so that the rice does not become excessively moist. At that time, the insulation of the main body of the insulated pot is not insulated, and the structure of the pot is not complicated by heating the side of the pot. Has been a further challenge.

[0003] The present invention is intended to solve such a problem, and can reduce the condensation on the upper portion of the inner periphery of the pot.
It is an object of the present invention to provide an insulated pot capable of preventing cooked rice such as rice from becoming excessive in moisture.

[0004]

According to the heat retaining kettle of the first aspect of the present invention, since the heat generating means protruding from the upper surface of the main body is provided inside the main body facing the gap between the lid and the main body.
When the heating means generates heat during rice cooking or warming, the outside air entering through the gap between the lid and the main body is heated. Thereby, cooling to the upper end of the pan due to outside air can be suppressed. In addition, since the lower surface of the flange at the upper end of the pan is placed on the upper surface of the heat generating means, the upper end of the pan is directly heated by the heat generating means, and in particular, the cooling of the pan itself in the upper part of the pan can be reduced. Moreover, since there is almost no gap between the lower surface of the pan flange and the heat generating means, heat radiated from the outer surface of the pan heated by the heat generating means causes heat between the lower surface of the pan flange and the heat generating means. It is difficult to escape from the gap between them. Therefore, it is possible to reduce the dew condensation on the upper part around the inner surface of the pot immediately after the heat retention, and it is possible to solve the problem that the cooked material such as the rice in the pot becomes excessively moist and the taste deteriorates. Here, the state in which there is almost no gap means that a gap having a dimension error is allowed, and the state in which there is substantially no gap.

Further, since the heating means is covered by the flange of the pot, exposure of the heating means when the lid is opened is minimized. In particular, the lower surface of the flange portion at the upper end of the pan is concave upward, and since the heating means is placed here, the seating (stable) when the pan is stored in the main body is good, and the main body is horizontally oriented. Also when viewed from above, the side of the heat generating means is covered by the concave portion, and the exposure of the heat generating means is further reduced. Therefore, it is possible to prevent the appearance from deteriorating when the lid is opened, while having a structure in which the heat generating means protrudes from the upper surface of the main body.

[0006] According to the insulated pot of the second aspect of the present invention, since the heating means protruding from the upper surface of the main body is provided inside the main body facing the gap between the lid and the main body, the rice is cooked in the pot after cooking. During the heat retention including the period until the temperature of the cooked rice such as rice drops to the warming temperature, and during the period of temporarily reheating the cooked food in the pan during the warming, the heating means generates heat. The outside air entering from the gap between the lid and the main body is heated, so that cooling of the upper end of the pot due to the outside air can be suppressed.
In addition, since the lower surface of the flange portion at the upper end of the pan is placed on the upper surface of the heat generating means, while the heat generating means generates heat, the upper end of the pan is directly heated by the heat generating means, particularly in the upper part of the pan. The cooling of the pot itself can be reduced. Therefore, it is possible to prevent the upper portion of the pot from cooling down immediately after the rice is cooked and before the food is eaten, and to reduce the condensation on the upper portion of the inner periphery of the pot. And the problem that the taste is lowered can be solved. In addition, when the cooked rice in the pot is reheated during the heat retention, moisture is generated from the cooked rice.
Dew condensation on the upper part around the inner surface of the pot can be reduced.

Further, since the lid packing is provided so as to be in contact with the upper surface of the flange portion of the pot and opposed to the heat generating means, when the heat generating means generates heat, the upper end of the pot heated by the heat generating means is moved to the lid packing. Heat is directly transmitted. For this reason, condensation on the lid packing as well as on the inner periphery of the pot can be prevented.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of an insulated pot according to the present invention. Figure 1
Referring to FIG. 2 and FIG. 2, reference numeral 1 denotes a main body corresponding to a heat retaining pot main body, and the main body 1 includes a substantially cylindrical outer frame 2 and an outer frame 2.
An outer shell is formed by the bottom plate 3 provided so as to cover the lower surface opening. A substantially cylindrical inner frame upper part 4 formed by hanging down from the upper outer peripheral part of the outer frame 2 and an inner frame 5 provided to cover the lower surface opening of the inner frame upper part 4 make the main body 1. A bottomed cylindrical pot housing portion 6 is formed therein. The upper portion 4 of the inner frame, which is the upper portion of the pot housing 6, is made of a synthetic resin such as PP (polypropylene) integrated with the outer frame 2, and the outer peripheral portion of the upper portion 4 of the inner frame has a heating coil, a cord heater, and the like. No heating means is provided. Further, the inner frame 5 forming the bottom of the pot housing portion 6 is formed of a synthetic resin such as PET (polyethylene terephthalate).

In the pot housing 6, a bottomed cylindrical pot 11 for accommodating cooked rice such as rice and water is detachably accommodated. The pot 11 is composed of a pot body 12 mainly made of aluminum having good heat conductivity, and a heating element 13 made of a magnetic metal plate such as ferrite stainless steel joined from a lower side surface to a bottom portion of the outer surface of the pot body 12. It is composed of The reason why the heating element 13 is not provided from the center to the top of the side surface of the pan 11 is to reduce the weight of the pan 11. At the upper end of the pan 11, an annular flange portion 14 protruding to the outer peripheral side is formed. The upper surface of the flange portion 14 is slightly inclined upward toward the outer periphery of the pan 11, but the flange portion 14 on the opposite side is raised.
A concave portion 15 that is concave upward is formed on the lower surface of the substrate. In the present embodiment, the pot 11 is detachably housed in the main body 1,
A configuration in which the pan 11 is accommodated in a state fixed to the main body 1 may be employed.

The inner frame 5 is located opposite to the heating element 13 of the pot 11, and the lower side of the outer surface of the inner frame 5 and the bottom face facing the heating element 13 are provided with an electromagnetic wave. A heating coil 16 is provided as heating means for induction heating. Further, at the center of the bottom of the inner frame 5, there is provided a temperature sensor 17 as a pan temperature detecting means for resiliently contacting the bottom surface of the pan 11 and detecting the temperature of the bottom surface.

In the space 20 outside the pot housing 6 in the main body 1, a control unit 21 for controlling the heating adjustment by the heating coil 16 is provided at a position behind the pot housing 6. Have been. The control unit 21 is equipped with various substrates and the like, and is located close to the outer surface of the pan storage unit 6. The portion of the control unit 21 facing the heating coil 16 (heating coil facing portion 22) is formed of a nonmagnetic metal such as an aluminum plate or a synthetic resin such as PET, 6PA (polyamide 6), or PP.
Then, when a high-frequency current is supplied from the control unit 21 to the heating coil 16, the heating element 13 of the pan 11 generates heat by an alternating magnetic field generated from the heating coil 16, and the cooked rice in the pan 11 and thus the cooked food in the pan 11 are heated. It has become. Reference numeral 23 denotes a power supply code reel provided in the space 20 in the main body 1.

On the upper side of the main body 1, there is provided a lid 26 for covering the upper opening of the pan 11 so as to be rotatable and openable. That is, the lid 26 is rotatably supported by a hinge 27 at a rear portion thereof, and is held in a closed state by a clamp 28 provided at a front upper portion of the main body 1.
The lid 26 forms an upper surface thereof, an outer cover 31, an inner cover 32 fixed below the outer cover 31, and an inner surface of the lid 31 fixed below the inner cover 32. Heat sink 33
Are the main components. Also, a predetermined gap is formed between the lower surface of the lid 26 and the lower surface of the
An inner lid 34 that directly covers the upper opening of the camera is detachably mounted. The heat sink 33 and the inner lid 34 are both made of metal,
For example, it is made of a material obtained by anodizing stainless steel or aluminum. In addition, the upper part around the inner surface of the pan 11
When the lid 31 is in the closed state, it is in contact with or close to the periphery of the inner lid 34. In the present embodiment, the upper part around the inner surface of the pot 11 and the inner lid 34
Although the proximity portion 35 is formed between the peripheral portion and the peripheral portion, the contact portion may be formed here by bringing both members into contact with each other. Located closer to the outer peripheral side than the proximity portion 35 or the contact portion, the lower side of the folded portion 36 formed at the outermost peripheral portion of the inner lid 34 is in close contact with the upper surface of the flange portion 14 of the pan 11, An annular lid packing 37 made of an elastic member such as silicone rubber or fluorine rubber is provided to close the gap between the pot 11 and the inner lid 34.
The lid packing 37 is sandwiched between the folded portion 36 and the packing fixing member 38 by a packing fixing member 38 provided in the folded portion 36 of the inner lid 34, and is fixed to the outermost peripheral portion of the inner lid 34. Although it is attached, the lid packing 37 may be detachable from the inner lid 34 in consideration of the cleanability of the inner lid 34 and the lid packing 37.

A cover heater 39 as cover heating means for heating the inner cover 34 is provided on the inner surface, that is, the upper surface of the heat radiating plate 33 serving as the lower surface of the cover 26. The lid heater 39 is made of, for example, an electrothermal heater such as a cord heater fixed to a radiator plate by an aluminum foil (not shown) provided with an adhesive tape.
In this embodiment, the lid heating means is an electric heater, but may be an electromagnetic induction heating type. The heat radiating plate 33 to which the heat of the lid heater 39 is directly transmitted is provided on the upper surface of the inner lid 34 or the inner lid 34.
And the lid packing 37 are provided. And
The lid heater 39 heats not only the radiator plate 33 and the inner lid 34, but also the vicinity 35 between the upper part of the pan 11 and the inner lid 34 and the lid packing 37, which are easy to cool down during cooking and keeping warm, so that the inner surface of the pan 11 is heated. It is configured to prevent dew condensation at the upper part of the periphery. further,
The lid 26 is provided with a steam port 40 for discharging steam generated in the pot 11 to the outside. Although not specifically shown in the present embodiment, a lid heater 39 may be provided around the steam port 40 in order to prevent the inside of the steam port 40 from being cooled.

The outer lid 31 forming the outer surface of the lid 26 is made of non-metallic material, that is, made of plastic such as polypropylene, and has an outer surface with the outer lid 31 by about 0.5 to 5 mm, preferably about 0.5 to 3 mm. Is formed, and a metal plate 42 of stainless steel or the like is mounted. This gap 41 acts as an adiabatic space that blocks heat from the outer lid 31 to the metal plate 42, so that the surface of the metal plate 42 during rice cooking and heat retention, that is, the outer surface temperature is 60 ° C. or less, preferably 55 ° C. or less. Formed. The metal plate 42 is provided not only to improve the appearance and strength of the outer surface of the lid 26, but also to improve cleanliness and prevent damage, and is provided near the front of the steam port 40 and the outer lid 31. It is mounted so as to cover the outer surface of the outer lid 31 except for the operation panel 43 for display operation.

The pot housing portion 6 constituting the main body 1 is provided so as to surround the outer surface of the pot 11 except for the upper portion of the pot 11 including the flange portion 14. The heat generating means 51 for heating the upper portion of the pan 11 is disposed below the flange portion 14 of the pan 11 and is arranged in an annular shape. The heat generating means 51 includes a spacer 52 as a heat dissipation suppressing member attached so as to be placed on the upper end of the pan housing portion 6;
A code heater 53 as a heat source held on the spacer 52 and a fixing bracket made of, for example, an aluminum plate, which is attached to the spacer 52 so as to cover the code heater 53 from above and has excellent heat conductivity, and a heat radiator. A metal plate 54 also serves as a plate, and is unitized so that it can be easily assembled to the main body 1. When the lid 26 is closed, a gap 55 is formed between the lower surface of the lid 26 and the upper end of the pot housing 6 constituting the main body 1. Inside, a heat generating means 51 is provided in a state protruding from the upper surface of the main body 1 and thus the pan housing portion 6. That is, the heat generating means 51 is provided on the upper surface of the pan housing portion 6 so as to close the gap 55.

A part of the metal plate 54 forming a heat radiating portion is in contact with the code heater 53 so that heat from the code heater 53 is quickly transmitted. Further, a protruding portion 56 protruding upward is formed on the metal plate 54, and on the upper surface of the protruding portion 56,
The lower surface of the flange portion 14 extending from the periphery of the upper end of the pan 11 to the outer peripheral side, that is, the concave portion 15 is placed, so that the pan 11 is stored in the pan storage portion 6 in a suspended state. Therefore, the pot
There is almost no gap between 11 and the upper end of the pan storage section 6 in which the pan 11 is stored. Here, the state in which there is almost no gap means that a gap having a dimension error is allowed, and the state in which there is substantially no gap. In addition, the outer shape of the flange portion 14 of the pan 11 is formed to be equal to or larger than the size of the cord heater 53 and the metal plate 54 of the heat generating means 51.
Is covered from above with a flange portion 14 and is located in the concave portion 15 thereof. Further, the contact portion of the lid packing 37 with the upper surface of the flange portion 14 of the pot 11 is a flange portion.
It is located to face the heat generating means 51 with the 14 interposed.
However, although not shown, for example, by bending the heating means 51 downward at both left and right sides of the pan housing part 6, the flange part 14 and the heating means 51 are brought into non-contact, so that the flange part 14 and the heating means 51 A gap is formed partially between them, and in this gap, the flange portion 14 can be used as a handle portion when the pan 11 is attached and detached. Further, the gap also has an action of discharging steam when cooking rice with water attached to the outer surface of the pot 11.

At the time of cooking rice and keeping warm, a high-frequency current is supplied to the heating coil 16 so that the heating coil is heated.
The heating element 13 of the pot 11 generates heat by the alternating magnetic field generated from the
11 is heated. In particular, at the time of warming, the heating by the heating coil 16 is adjusted in accordance with the temperature detected by the temperature sensor 17 in contact with the bottom surface of the pan 11, and the pan 11 is maintained at a constant temperature (about 73 ° C.).

Further, after the rice is cooked, a period until the temperature of the rice to be cooked in the pot 11 drops from about 100 ° C. to the heat retaining temperature (about 73 ° C.), and the temperature of the rice is stable at about 73 ° C. When the temperature is stabilized, the code heater 53 of the heating means 51 is heated. Thereby, heat is radiated from the metal plate 54 of the heat generating means 51 to the space of the gap 55 between the lid 26 and the main body 1, thereby suppressing cooling due to invasion of outside air from the gap 55 and The 11 flanges 14 are heated. With this,
During the period of temporarily reheating the rice in the pot 11 when keeping warm,
The flange 14 of the pan 11 is heated by the heat generating means 51. When the rice in the pot 11 is reheated by the heating coil 16 during the heat retention, moisture is generated from the rice by this heating, but the heating of the heating means 51 prevents dew condensation on the upper inner surface of the pot 11.

Thus, according to the configuration of the above embodiment,
Inside the main body 1 facing the gap 55 between the lid 26 and the main body 1,
A heating means 51 protruding from the upper surface of the main body 1 is provided, and is used for cooking and warming, particularly during warming including a period until the temperature of the rice in the pot 11 drops to the warming temperature after cooking, and temporarily during warming. By causing the heating means 51 to generate heat during the period in which the rice in the pot 11 is reheated, the outside air entering through the gap 55 between the lid 26 and the main body 1 is heated, and the upper end of the pot 11 is cooled by the outside air. Can be suppressed. Further, since the lower surface of the flange portion 14 of the pan 11 is placed on the upper surface of the heating means 51, the pan
The upper end of the pan 11 is heated, and the cooling of the pan 11 itself, especially at the top of the pan 11, can be reduced. Moreover, since the lower surface of the flange portion 14 of the pot 11 and the heat generating means 51 are in contact with almost no gap, the heat radiated from the outer surface of the pot 11 heated by the heat generating means 51 is Heat generation means 51 with lower surface of part 14
Escape from the gap between them. Therefore, it is possible to reduce dew condensation on the upper part of the inner periphery of the pot 11 during the time immediately after cooking until eating the rice, or when temporarily reheating the rice in the pot 11 during the heat retention. It is possible to eliminate the problem that the rice in 11 becomes excessively moist and the taste is reduced.

Further, the lid packing 37 provided on the lower surface of the lid 26 and in contact with the upper surface of the flange portion 14 of the pan 11
When the heat generating means 51 generates heat,
Heat is directly transmitted to the lid packing 37 from the upper end of the pan 11 heated by the heat generating means 51. Therefore, dew condensation on the lid packing 37 as well as on the inner periphery of the pot 11 can be prevented.
The problem that the rice in 11 becomes excessively moist and the taste is reduced can be more reliably eliminated.

Further, the heating means 51 is connected to the flange portion 14 of the pan 11.
, The exposure of the heating means 51 when the lid 26 is opened is minimized. Especially the flange at the top of pan 11
On the lower surface of 14, there is a concave portion 15 which is recessed upward, and since the heating means 51 is placed on the concave portion 15, the pan 11 is well seated (stability) when housed in the main body 1, and the main body 1 is horizontally Also when viewed from the direction, the side of the heat generating means 51 is covered by the concave portion 15, and the exposure of the heat generating means 51 is further reduced. Therefore, while having a structure in which the heating means 51 protrudes from the upper surface of the main body 1, the lid
The appearance can be prevented from deteriorating when 26 is opened.

It should be noted that the present invention is not limited to the above embodiment, and various modifications can be made. For example, the configuration of the heating means 51 is not limited to that of the above-described embodiment. For example, in the above-described embodiment, the pan 11
Although the projection 56 on which the flange 14 is placed is formed, the entire upper surface of the metal plate 54 may be bulged to form a projection on which the flange 14 of the pan 11 is placed. .

[0023]

According to the insulated pot of the first aspect of the present invention, dew condensation on the inner peripheral portion of the pot can be reduced, and the problem that the cooked material such as rice has excessive moisture can be solved. In addition, even when the pan is housed in the main body, the seat is good, and the heat generating means protrudes from the upper surface of the main body.

According to the second aspect of the present invention, the inner periphery of the pot during the period from immediately after cooking to the time when the cooked material such as rice is eaten, and further during the period when the cooked rice in the pan is reheated during the heat retention. It is possible to reduce the condensation on the upper part and also the condensation on the lid packing, and it is possible to solve the problem that the cooked food has excessive moisture.

[Brief description of the drawings]

FIG. 1 is an overall cross-sectional view of a warming pot showing one embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a part of the above.

[Explanation of symbols]

 1 Body 11 Pot 14 Flange 15 Recess 26 Cover 37 Cover packing 51 Heating means 55 Clearance

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Shoji Sakai 2570-1, Gosuda, Kaji, Niigata Prefecture Toshiba Home Techno Co., Ltd. Inside Techno Co., Ltd. (72) Inventor Takashi Tsurumaki 2570-1 Gosuda, Kamo-shi, Niigata Pref. GC05 GC06

Claims (2)

[Claims] 1. A pot having a flange formed at an upper end thereof and a recess recessed upwardly formed on a lower surface of the flange, a main body for accommodating the pan, and a lid, wherein the lid and the main body are provided. A heating means is provided inside the main body facing the gap between the heating means and the heating means so as to protrude from the upper surface of the main body, and the heating means is covered with a flange portion of the pot, so that the concave portion of the pot is formed on the upper surface of the heating means. An insulated kettle characterized in that it is placed with almost no gaps. 2. A pot having a flange formed at an upper end, a main body for accommodating the pan, and a lid, wherein the main body is provided inside the main body facing a gap between the lid and the main body. A heat generating means is provided protruding from an upper surface, and a lid packing is provided on a lower surface of the lid body at a position in contact with the upper surface of the flange portion of the pan and opposed to the heat generating means, and a lower surface of the flange portion of the pan is provided. Is placed on the upper surface of the heating means, and during the heat retention including a period until the temperature of the cooked food in the pan falls to the heat retention temperature after cooking, the cooked food in the pan is temporarily heated. A heat retaining pot, wherein the heat generating means is configured to generate heat during a reheating period.