JPH0767768A - Rice cooker - Google Patents

Abstract

PURPOSE:To heat uniformly the bottom of a container without reducing the content vole in the container. CONSTITUTION:A strap-like flat portion 10 forming the bottom surface of a container 4 is provided in the outer periphery of the container 4. The inner periphery side of this flat portion 10 is formed as a contact portion 14 to be in contact with a plate 13. A heater 22 is provided not to contact the plate 13. Thereby. the contact portion 14 is formed on the inner periphery side of the flat portion 10, so that the contact portion 14 can be moved closer toward the central side of the container 4 than conventional ones. As a result. a well- balanced heating of not only the outer periphery side of the container 4 but the inner periphery side of the bottom surface can be realized. Also, since the flat portion 10 forms the bottom surface of the container 4, it is not necessary to make a curved portion 12 between the flat portion 10 and an outside portion 11 large.

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 preventing uneven heating in a container and for cooking rice without uneven cooking.

[0002]

2. Description of the Related Art Conventionally, this type of radiant heating type rice cooker is
A cylindrical container with a bottom is housed in the main body of the vessel, a heater as a heating element is attached to the bottom of the main body of the vessel, and the heat conductive plate on the top of the heater contacts the vessel to prevent the heater from being exposed. The radiant heat from the heater is radiated into the space. Then, the space between the container and the main body of the container is heated, then the heat radiated into the space is received on the back surface of the plate, and the heat of the plate is transferred to the container side by heat conduction from the contact portion between the container and the plate. Thus, the entire container is heated.

[0003]

In the rice cooker having the above-mentioned conventional structure, most of the heat released from the heater into the space is collected in the contact portion between the container and the plate, but it is realistic. Since the container and the plate cannot be brought into uniform contact with each other due to a problem in dimensional accuracy, thermal deformation when heated, and the like, uneven heating is caused by local heating due to partial contact. Therefore, the outer circumference of the bottom surface of the container is curved in an R shape, and the strength of the bottom of the container and the ease of installation on a mounting surface such as a table are improved,
In order to stabilize the dimensional accuracy, the central portion of the bottom surface of the container is formed in a convex shape, and the plate is linearly brought into contact with the bottom surface of the container located at the lower end of the R-shaped curved portion to form a container. The contact with the plate is enhanced. However, in such a configuration, since the contact portion between the container and the plate is formed near the outer periphery of the container, the heat from the heater is concentrated on the outer peripheral portion of the container, and only this outer peripheral portion is stronger than the central portion. It causes heating and uneven heating. Further, it is conceivable to form the R-shaped curved portion large up to approximately the center of the bottom surface of the container and move the contact portion toward the central portion, but there is a problem that the inner volume of the container becomes small.

In view of the above problems, the present invention provides a rice cooker capable of improving the heating balance at the bottom of the container and performing uniform heating without uneven heating without reducing the inner volume of the container. The purpose is to

[0005]

A rice cooker according to claim 1 has a bottomed cylindrical container, a strip-shaped flat portion which is provided on an outer peripheral portion of the container and forms a bottom surface of the container, and a flat portion of the flat portion. A plate having thermal conductivity, which is provided in a linear contact state on the peripheral side and is arranged to face the entire outer bottom surface of the container, a heating space formed below the plate, and the heating space that is not in contact with the plate. And a radiant heating type heater provided in this state.

Further, in the rice cooker according to a second aspect of the present invention, the heater is provided with an inner peripheral portion provided opposite the contact portion between the container and the plate, and an outer peripheral portion provided outside the inner peripheral portion of the container. And an outer peripheral portion for giving radiant heat.

[0007]

According to the structure of claim 1, the contact portion between the container and the plate is formed along the inner peripheral side of the flat portion located on the outer peripheral portion of the container. Furthermore, this contact portion moves to the central portion side. Also,
Since the flat portion forms the bottom surface of the container, it is not necessary to form a large curved portion between the flat portion and the outer portion.

According to the second aspect of the invention, the heater of the inner peripheral portion heats the bottom portion of the container via the plate, and the heater of the outer peripheral portion heats the outer portion of the container.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows a partial cross-sectional view of a radiant heating type rice cooker. In FIG. 1, reference numeral 1 denotes a bowl main body having an opening on the upper surface. 3 and 3. Reference numeral 4 denotes a bottomed cylindrical container that is removably housed in the inner frame 2 and is composed of a member having good thermal conductivity such as aluminum. A substantially flat convex portion 5 is formed at the center of the bottom surface of the container 4, and a thermistor 7 as a container temperature detecting means is incorporated so that the outer bottom portion of the convex portion 5 is pressed by the elastic force of the spring 6. A plate 8 is provided in the inner frame 2. The convex portion 5
An inclined portion 9 is formed on the outer side of the container 4, and a strip-shaped flat portion 10 forming the bottom surface of the container 4 is provided on the outer peripheral portion of the container 4 located outside the inclined portion 9. And this flat part 10
An R-shaped curved portion 12 is formed between the outer peripheral side and the lower portion of the outer portion 11.

Reference numeral 13 denotes a heat-conductive aluminum plate provided on the bottom of the inner frame 2. This plate 13 is subjected to secondary electrolytic alumite on the surface after primary electrolytic alumite, and then subjected to secondary electrolytic alumite in an electrolytic solution containing nickel, etc., and maintains a good heat absorption property by performing a series of black alumite treatments. In addition, the heat resistance and strength of the surface of the plate 13 are improved. Also,
In order to prevent the exposure of the heater, which will be described later, the plate 13 is arranged so as to face the entire outer bottom surface of the container 4. The plate 13 is provided in a linear contact state along the inner peripheral side of the flat portion 10 constituting the container 4, and an annular contact portion 14 is formed at the contact portion between the plate 13 and the container 4. A plate support 15 is provided below the plate 13, and a spring 17 provided between the flange portion 15A of the plate support 15 and the support plate 16 biases the plate 13 upward, that is, toward the container 4 side. ing.

Reference numeral 21 is a heating space formed below the plate 13 and between the inner frame 2 and the heating space 21.
A radiant heating type heater 22 composed of a sheathed heater is provided in a non-contact state with the plate 13. The heater 22 is constructed by providing a heating line (not shown) on a stainless steel pipe, and as shown in FIG. 2, is substantially C-shaped and concentric with the bottom surface of the container 4. Formed. That is, the heater 22 is provided so as to face the contact portion 14 between the container 4 and the plate 13, and the inner peripheral portion 23 is provided so as to be folded back outside the inner peripheral portion 23, and the outer portion 11 and the curved portion 12 and the like are provided. An outer peripheral portion 24 that applies radiant heat to the side portion of the container 4 and an end portion 25 that electrically connects to the outside is opposed to each end of the outer peripheral portion 24.

Referring again to FIG. 1, 26 is a body heater provided on the outer side of the inner frame 2, 27 is the inner frame 2 and the outer frame 3.
A heat insulator 28 provided between the inner frame 2 and the outer frame 3 constitutes an upper portion of the container body 1 and connects the inner frame 2 and the outer frame 3. Also, 29
Is a heater installation table for mounting and fixing the heater 22.

Reference numeral 31 is a lid that covers the upper opening of the container 4 so as to be openable and closable. The lid 31 is an outer lid 32 made of ABS resin or the like.
And a lid frame 33 provided along the lower outer periphery of the outer lid 32.
And a lid lower surface plate 34 made of aluminum or the like attached to the lower side of the outer lid 32 while forming a space. Further, a lid heater 35 that heats the lid lower surface plate 34 during rice cooking is provided on the upper surface of the lid lower surface plate 34, and a lid sensor 36 that detects the temperature of the lid lower surface plate 34 is provided. The lid lower surface plate 34 is attached and fixed to the lid frame 33 via the screw 38 together with the heat insulating plate 37 made of an aluminum plate, and is formed in an annular shape by extrusion molding between the lid lower surface plate 34 and the lid frame 33. The lid packing 39 is held so as to abut the upper end of the container 4. Insulation board 37
A heat insulating material 40 made of glass wool is provided in the heat insulating space formed above.

On the other hand, a concave portion 32A is formed on the upper surface of the outer lid 32, and the operation display unit 41 is accommodated in the concave portion 32A.
The configuration of the operation display unit 41 will be described in detail with reference to FIGS. 3 and 4. Reference numeral 42 denotes a control board provided at the bottom of the recess 32A, and the surface of the control board 42 is a liquid crystal display L.
An LCD holder 44 for accommodating the CD 43 is provided. on the other hand,
An operation panel assembly 45 is provided above the recess 32A so as to cover the recess 32A. The operation panel assembly 45 is a polyester operation panel sheet whose surface is flush with the operation panel 46 made of a transparent acrylic resin or the like.
The control panel sheet 47 is integrally formed by outsert molding while covering the entire surface of the control panel 46 with the control panel sheet 47. In addition, a transparent portion 48 is formed at a substantially central portion of the operation panel assembly 45 so as to face the LCD 43, and
A switch operating portion 49 and the like are formed on the operation panel sheet 47 located outside the transparent portion 48. Further, 50 is a character sheet made of polyester or the like, and like the operation panel assembly 45, a transparent portion 51 is formed facing the LCD 43, and a rice cooking menu display portion 52 is formed outside the transparent portion 51. To be done. The character sheet 50 is attached and fixed to a step portion 46A formed on the inner peripheral surface of the operation panel 46, and a predetermined space 53 is formed between the operation panel 46 and the character sheet 50 by the step of the step portion 46A. . On the other hand, 54 is a transparent polyester anti-fogging sheet provided below the character sheet 50. The antifogging sheet 54 is formed in a concave shape at the center thereof so as to face the LCD 43, so that a predetermined space 55 is also formed between the character sheet 50 and the antifogging sheet 54.

As shown in FIG. 4, the switch operating portion 49 formed on the operation panel sheet 47 is a mode switch 49.
A, hour / minute switch 49B, start / off switch 49C,
It is composed of a warm / hot switch 49D and a menu switch 49E. In addition to these switch operating sections 49, the operation panel sheet 47 is provided with operation state display sections 61 each having an LED (not shown). The operation state display unit 61 includes a rice cooking / purple display unit 61A, a heat retention / hot display unit 61B, and a timer display unit 61C. On the other hand, on one side of the LCD 43, 62A for clock, 62B for instant rice cooking,
62C for timer 1, 62D for timer 2, 62 for timer 3
E, each mode display section 62 of the fire control 62F is installed in parallel, and "1", "2",
A heating amount setting display unit 63 having the display modes of “3”, “4”, “5” and “fluffy”, “shaking” is provided. Further, reference numeral 64 is a substantially triangular menu indicator portion, which is provided so as to face the rice cooking menu display portion 52, respectively. A current time display section 65 and a cooked time display section 66 are provided in the approximate center of the LED 43.
65 and 66 are provided with AM / PM switching display sections 65A and 66A having display forms of "AM" and "PM", and 4-digit segment display sections 65B and 66B. As shown in FIG. 5, instead of the AM / PM switching display units 65A and 66A, an AM display unit 68 in the form of the sun and an PM display unit 69 in the form of the moon are overlapped, and these two elements are combined. It is also possible to switch the display between am and pm by selectively using. In this case, in the morning, only the morning display section 68 shown in FIG. 6 is displayed, and in the afternoon, only the afternoon display section 69 shown in FIG. 7 is displayed. Further, as shown in FIG. 8, only the afternoon display section 69 may be entirely displayed.

Next, the configuration of the block diagram shown in FIG. 9 will be described. 81 is a peripheral memory 82 and a time measuring means 83
A well-known microcomputer having
On the input side of this microcomputer 81, input means 84
While the switch operation unit 49 is connected via
The temperature detecting means 86 such as the thermistor 7 and the lid sensor 36 are connected via the input means 85. Further, a plurality of output means 87, 88, 89 are connected to the output side of the microcomputer 81, and a timer 90, a rice cooking means 91 and a display means 92 of the operation display unit 41 are connected to the output means 87, 88, 89, respectively. Connected. The microcomputer 81 controls the rice cooking means 91 in accordance with the programs stored in the memory 82 according to the input conditions of the temperature detecting means 86 and the switch operating section 49, the time preset in the timer 90, and the like. Then, the rice cooking means 91 controls the power supply to the heater 22, the body heater 26, and the lid heater 35 based on the control command from the microcomputer 81.

Next, the operation of the above structure will be described. First, each operation based on the operation of the operation display unit 41 will be described. In this embodiment, every time the mode switch 49A is pressed, the display of the mode display section 62 is for clock 62A → for instant cooking 62B → for timer 1. 62C → 62D for timer 2 → 62E for timer 3 → 62F for heat adjustment → 62A for clock. Then, when the mode display portion 62 of the timepiece 62A is selected, the mode display portion 62 of the timepiece 62A and the current time display portion 65 are displayed as shown in FIG. The part 65 is in a blinking state, and the current time setting can be changed by the hour / minute switch 49B. Even when the present time display section 65 is blinking, the time is counted. On the other hand, 62B mode display section 62 for instant rice cooking
When is selected, as shown in FIG. 11, the mode display portion 62 of the instant rice cooker 62B, the menu index portion 64, and the current time display portion 65 are displayed, and the start / off switch 49C is displayed. When is pressed, rice cooking is immediately started via the rice cooking means 91. Also, for timer 1 62C, for timer 2
When the mode display portion 62 of 62D or 62E for timer 3 is selected, the cooking time of the timer 90 reserved and stored in each course (for example, timer 1
Is "AM 6:00" and Timer 2 is "AM 7: 0"
0 ”, timer 3“ PM 7:00 ”) is displayed on the cooked time display section 66 and the start / off switch 49C is displayed.
When is pressed, rice cooking control is performed based on the timer operation so that the rice cooking is completed at the time displayed in the cooked time display unit 66. (The display form when the mode display portion 62 of the timer 1 62C is selected is shown in FIG. 12.) Also, while the cooked time display portion 66 is displayed, the cooked rice is cooked by operating the hour / minute switch 49B. The time setting can be changed, and the newly updated time is set by the microcomputer 81.
Is stored in the timer 90 via. Furthermore, for fire control 62F
When the mode display unit 62 of is selected, as shown in FIG. 13, the mode display unit 62 of the fire control 62F, the heating amount setting display unit 63, and the menu index unit 64 are displayed. By operating the hour / minute switch 49B, it becomes possible to variably set the heating amount during rice cooking. The heating amount can be adjusted in five steps from "1" to "5" shown in the heating amount setting display portion 63, and the state is stored after the setting.

On the other hand, when the switch is off, the heat retention / hot switch
When 49D is operated, the heat retention operation is started via the rice cooking means 91, and when the heat retention / hot switch 49D is operated during the heat retention, the inside of the container 4 is reheated to a predetermined temperature. Further, the menu index portion 64 of the LCD 43 is moved each time the menu switch 49E is pressed and operated, and the rice cooking menu can be appropriately switched according to preference. Furthermore, when the start / off switch 49C is pressed during rice cooking, all the operations being executed are canceled.

When a series of rice cooking operations is started by the above operation, the heater 22, the body heater 26, and the lid heater 35 are turned on and off via the rice cooking means 91. Then, when the heater 22 is energized, the heat from the heater 22 is conducted to the plate 13 through the heating space 21, and the contact portion between the container 4 and the plate 13
From 14 the bottom of the container 4 is gradually heated. At this time, since the contact portion 14 is formed along the inner peripheral side of the flat portion 10 inside the curved portion 12, the contact portion 14 is located at the center more than the contact portion between the conventional container 4 and the plate 13. Moved to the department side,
As a result, not only the outer peripheral side of the bottom surface of the container 4 but also the inner peripheral side of the bottom surface are uniformly heated in a well-balanced manner. Further, since the flat portion 10 located on the outer peripheral portion of the container 4 forms the bottommost surface of the container 4, it is not necessary to form the curved portion 12 formed between the flat portion 10 and the outer portion 11 large. Container 4
It is also possible to prevent the internal volume of the battery from decreasing. Further, since the inner peripheral portion 23 of the heater 22 is arranged so as to face the contact portion 14 between the container 4 and the plate 13, the inner peripheral portion 23 mainly acts to heat the contact portion 14. The outer peripheral portion 24 of the heater 22 mainly acts to radiatively heat the outer portion 11 of the container 4 through the heating space 21. Therefore, the bottom portion of the container 4 is heated by the heater 22 of the inner peripheral portion 23 via the plate 13, and the outer peripheral portion 24
The outer portion 11 of the container 4 is heated by the heater 22 described above, so that the entire container 4 can be uniformly and evenly heated. Moreover, since the contact portion 14 is moved to the center side of the container 4 having the thermistor 7, the temperature rise of the container 4 can be detected quickly, and the occurrence of charring due to the delay in the dry-up detection can be suppressed.

FIG. 14 and FIG. 15 are characteristic diagrams of the conventional example and the present example showing the temperature change from the start of rice cooking to after the dry-up in each part of the container 4. In addition,
As shown in FIG. 16, H in FIG. 14 and FIG.
14 is the temperature, T is the temperature at the center of the bottom surface of the container 4, a is the temperature at the upper layer of the container 4 located 10 mm below the water surface, b is the temperature at the middle layer of the container 4, and c is the temperature at the bottom of the container 4. The temperature in the lower layer portion of the container 4 at a position 10 mm higher is shown. Further, in FIG. 16, R is rice contained in the container 4, and W is water.

As shown in FIGS. 14 and 15, in the conventional example, it is understood that the temperatures b and c of the middle layer portion and the lower layer portion rise slowly. Therefore, the boiling temperature may not reach a sufficient boiling point at the time of dry-up when the water W is exhausted, and the rice may become hard or the core may remain. On the other hand, in this embodiment, the difference in temperature rise between the temperatures H and T at the contact portion 14 and the center of the bottom surface of the container 4 is small. That is, it can be seen that the heating balance of the entire bottom surface of the container 4 is significantly improved as compared with the conventional example. Further, since the outer side portion 11 of the container 4 is well heated by the radiant heating from the outer peripheral portion 24 of the heater 22, the temperature a of the upper layer portion rises faster than before. Therefore, in accordance with the decrease in the water level due to the absorption of water of rice R, the temperatures b and c in the middle layer and the lower layer also rise similarly, and the entire container 4 is quickly and uniformly heated to prevent uneven cooking. You can cook rice.

In the operation display unit 41, since the operation panel 46 and the operation panel sheet 47 are integrally formed, the operation panel sheet is extended to the end of the operation panel 46.
The upper surface of the operation panel 46 can be covered with 47. Therefore, the entire operation panel 46 can be formed in advance with a transparent material through which the LCD 43 can be seen, and the switch operation section 49 and the like can be provided on the operation panel sheet 47. Further, since the cooked rice menu display portion 52 is formed by printing on the character sheet 50, the LCD 43 only needs to be provided with the menu indicator portion 64 corresponding to each cooked rice menu display portion 52, and the LCD 43 can be made compact. .

By the way, the space 53 is sealed between the operation panel 46 and the character sheet 50, and the heat insulating effect of this part is great. Therefore, the temperature difference between the operation panel sheet 47 and the character sheet 50 becomes small, and the dew condensation on the surface of the character sheet 50 is suppressed. Further, since the sealed space 55 is formed between the character sheet 50 and the anti-fog sheet 54, the space 53 is formed.
Similarly to this, the heat insulating effect of this portion is large, the temperature difference between the operation panel sheet 47 and the antifogging sheet 54 is small, and dew condensation on the surface of the antifogging sheet 54 is suppressed. In addition, even if dew condensation occurs inside the operation display unit 41, dew condensation occurs from a portion other than the anti-fog sheet 54, which has a small heat insulating effect.
The influence of dew condensation on the transparent portion 48 located in the display portion of the CD 43 can be suppressed as much as possible. In addition, the step portions 46A of the operation panel 46 and the concave antifogging sheet 54 allow the respective space portions 51, 53
Is formed from the upper surface of the operation panel sheet 47, LC
Even if the D43 side is pressed, the LCD 43 does not come into contact with the anti-fog sheet 54 or the like, and it is possible to prevent the occurrence of an interference pattern on the LCD 43 due to the contact.

As described above, according to the above embodiment, the contact portion
Since 14 is formed linearly along the inner peripheral side of the flat portion 10,
The contact portion 14 moves further toward the center of the container 4 than in the conventional case. Further, since the flat portion 10 located on the outer peripheral portion of the container 4 forms the bottom surface of the container 4, the flat portion 10 is formed between the flat portion 10 and the outer portion 11 to move the contact portion 14 toward the center of the container 4. The curved portion 12 to be formed does not need to be formed large up to approximately the center of the bottom surface of the container 4. This makes it possible to improve the heating balance at the bottom of the container 4 and to perform uniform heating without uneven heating without reducing the internal volume of the container 4.

Further, since the heater 22 of the inner peripheral portion 23 heats the bottom portion of the container 4 via the plate 13 and the heater 22 of the outer peripheral portion 24 heats the outer portion 11 of the container 4,
The whole can be uniformly heated with a better balance.

Further, the following points can be mentioned as effects of the embodiment. First, since the current time, the timer time, the level of fire adjustment, etc. generally need not be reset once they are set, these modes are configured to be selected by one common mode switch 49A. As a result, the number of switch operating sections 49 can be significantly reduced without any functional inferiority to the conventional one. Further, for example, even if the number of timers set is increased more than in the embodiment, the setting of each mode can be switched by operating the common single mode switch 49A, and the menu switch 49E and the like can be shared with the mode switch 49A. By doing so, the number of switch operating parts 49 can be further reduced.

By the way, in daily use, there is a usage of a rice cooker peculiar to each household, for example, there are households that use a timer function every time, and conversely, households that do not use a timer function at all. In this embodiment, paying attention to this point, by operating the mode switch 49A in advance to select either instant rice cooking or timer reservation, the subsequent operation of the start / off switch 49C automatically cooks rice in a desired state. The operability can be remarkably simplified.

Further, as shown in FIGS. 5 to 8, by overlapping the morning display portion 68 and the afternoon display portion 69 depending on the sun and the moon, it is easier to distinguish them from the letters and the same display space is used. That is, the display can be made larger, and the time display portions 65 and 66 can be freed from complicated display forms.

Further, since the space portion 51 and the space portion 53 having a heat insulating effect are formed inside the operation display unit 41, it is possible to prevent the display portion of the LCD 43 from being fogged even if the usage environment changes. You can Further, even if dew condensation occurs inside the operation display unit 41, dew condensation occurs from a portion other than the anti-fog sheet 54, which has a small heat insulating effect, so that the transparent portion 48 and the like can be prevented from fogging. Moreover, space 5
By forming the cooked rice menu display portion 52 on the character sheet for forming the 1, 53, the display content of the LCD 43 can be simplified and downsized.

The present invention is not limited to the above embodiment, but various modifications can be made within the scope of the present invention. For example, the heater may be formed in a double spiral shape in addition to the substantially C-shape in the embodiment, or 2
The inner peripheral portion and the outer peripheral portion may be independently formed by a book heater.

[0031]

The rice cooker according to the first aspect of the invention has a bottomed cylindrical container, a strip-shaped flat portion which is provided on the outer peripheral portion of the container and forms the bottom surface of the container, and a line on the inner peripheral side of the flat portion. Plate having a thermal conductivity, which is provided in a circular contact state and is opposed to the entire outer bottom surface of the container, a heating space formed below the plate, and a heating space provided in the heating space in a non-contact state with the plate. It consists of a radiant heater and improves the heating balance at the bottom of the container.
In addition, it is possible to perform uniform heating without heating unevenness without reducing the inner volume of the container.

Further, in the rice cooker according to a second aspect of the present invention, the heater is provided with an inner peripheral portion provided opposite the contact portion between the container and the plate, and an outer peripheral portion provided outside the inner peripheral portion of the container. It is composed of an outer peripheral part for giving radiant heat, and the whole container can be uniformly and evenly heated.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view of a rice cooker showing an embodiment of the present invention.

FIG. 2 is a front view of the same heater.

FIG. 3 is a sectional view of a main part of the same.

FIG. 4 is a front view of the operation display unit and its periphery.

FIG. 5 is a front view of a time display unit showing another display mode of the above.

FIG. 6 is a front view of a time display unit showing a display form in the morning same as above.

FIG. 7 is a flow chart up to the end of main rice cooking.

FIG. 8 is a front view of a time display section showing another display mode of the above.

FIG. 9 is a block diagram showing an electrical configuration of the same.

FIG. 10 is a front view of the operation display unit showing a display form when the mode display unit for the same watch is selected.

FIG. 11 is a front view of the operation display unit showing the display form when the mode display unit for instant rice cooking is selected.

FIG. 12 is a front view of the operation display unit showing the display form when the mode display unit for the timer 1 is selected.

FIG. 13 is a front view of the operation display unit showing a display form when the mode adjustment unit for adjusting heat is selected.

FIG. 14 is a characteristic diagram showing a temperature change of each part in the container in the conventional example.

FIG. 15 is a characteristic diagram showing a temperature change of each part in the container in the present embodiment.

FIG. 16 is a schematic explanatory view showing each measurement point in the container.

[Explanation of symbols]

 4 Container 10 Flat part 11 Outside part 13 Plate 14 Contact part 21 Heating space 22 Heater

Claims (2)

[Claims] 1. A bottomed cylindrical container, a strip-shaped flat portion which is provided on the outer peripheral portion of the container and forms the bottom surface of the container, and a linear contact state provided on the inner peripheral side of the flat portion, and A plate having heat conductivity arranged to face the entire outer bottom surface of the container, and a heating space formed below the plate,
A rice cooker comprising a radiant heating type heater provided in the heating space in a non-contact state with the plate. 2. The heater comprises an inner peripheral portion provided to face a contact portion between the container and the plate, and an outer peripheral portion provided outside the inner peripheral portion to apply radiant heat to an outer portion of the container. The rice cooker according to claim 1, wherein the rice cooker is used.