JP3097341B2 - rice cooker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice cooker provided with temperature detecting means such as a temperature sensor for detecting the temperature of a pot.

[0002]

2. Description of the Related Art Conventionally, a radiant heating type rice cooker has been
As shown in FIG. 9, a container 1 serving as a pan is housed in a container body 2, and heating is performed between a side portion and a bottom portion between the container 1 and the container body 2. A space 3 is formed, and a heating element 4 such as a sheathed heater is mounted on the bottom of the vessel body 2. In order to control the heating element 4, a heat sensing element including a temperature sensor 5 serving as a temperature detecting means and a heat sensing plate 6 is provided. 7 presses the bottom of the container 1. The heating element 4 is energized while the temperature of the container 1 is detected by the temperature sensor 5 to dissipate the radiant heat from the heating element 4 to the heating space 3 and heat the side and bottom of the container 1 to cook rice. To do.

On the other hand, in a hot plate type rice cooker, as shown in FIG. 10, a container 1 is stored in a container body 2, and a hot plate 8 is mounted on the bottom of the container body 2 so as to contact the bottom of the container 1. In addition, the heat sensitive element 7 for controlling the heat generating element 4 of the hot plate 8 presses the bottom of the container 1.

[0004]

In each of the above-mentioned prior arts, the temperature of the container 1 is detected by bringing the heat-sensitive plate 6 into contact with the bottom of the container 1 in each case. The contact portion with the non-heated portion becomes a non-heated portion, and the amount of heating is weaker than other portions. Moreover, in the former radiant heating type rice cooker, when a sheathed heater is formed as a heating element 4 in a circular shape, the container 1 located above the heating element 4
Strong radiant heat is supplied only to the bottom of the heating element 4 and the heating element 4 hinders the cleaning of the container body 2 in the vicinity of the outer periphery of the heating element 4. Further, in the case where a sheathed heater is formed in the shape of a plate as the heating element 4, a gap for supplying heat dissipated below the heating element 4 to the side of the container 1 is required, and the appearance is poor. In addition, not only does the cleanability deteriorate due to dust entering the voids, but also the heat dissipated below the heating element 4 does not completely reach the side of the container 1, resulting in poor heating efficiency. On the other hand, in the latter hot plate type rice cooker,
When the amount of heating on the side of the bottom of the container 1 is small, uniform heating of the container 1 is not performed, and when foreign matters such as rice grains adhere on the hot plate 8, the container 1 and the hot plate 8 The contact state becomes worse, resulting in uneven heating.

On the other hand, in Japanese Utility Model Application No. 57-164733 (Microfilm of Japanese Utility Model Application Publication No. Sho 59-67130), a rice cook completion detecting thermostat for detecting the temperature of the inner cook pot when rice is cooked is brought into contact with the bottom surface of the inner cooker. There is disclosed an electric rice cooker in which another heat-sensing element is provided outside the outer pan while being provided so as to protrude from the outer pan and indirectly detecting a rise in the temperature of the inner pan.

However, in this case, the rice cooking completion detection thermostat, which is indispensable for cooking rice, is provided so as to protrude from the inner surface of the outer pan that houses the inner pan. The rice cook completion detection thermostat that protrudes from the inner surface of the hamper becomes an obstacle. Also, in order to move the rice-cooking detection thermostat so that the rice-cooking detection thermostat presses the bottom of the inner pot, a gap must be formed between the outer periphery of the rice-cooking detection thermostat and the outer pot. However, if foreign matter such as rice grains enters from this gap, it is extremely difficult to take out the foreign matter, and this is also a factor of deteriorating the cleanability.

[0007] Therefore, an object of the present invention is to solve the above-mentioned problems and to provide a rice cooker which does not deteriorate the cleanability of the pot housing portion in the configuration provided with the temperature detecting means.

[0008]

In the rice cooker according to the present invention, the temperature detecting means for detecting the temperature of the pot is provided outside the pot accommodating portion for accommodating the pot and the outer periphery of the bottom of the pot is curved. It is provided fixedly at the contact portion with the portion.

Further, in the rice cooker according to the present invention, the temperature detecting means for detecting the temperature of the pot is formed without forming a gap around the temperature detecting means between the temperature detecting means and the pot accommodating portion for accommodating the pan. To
It is provided outside the pan housing portion and at a contact portion with a curved portion on the outer periphery of the bottom of the pan.

In the rice cooker according to a third aspect of the present invention, a plurality of the temperature detecting means are provided in the configuration of the first or second aspect,
It is characterized by shifting from rice cooking to spotting.

A rice cooker according to a fourth aspect of the present invention is the rice cooker according to the first or second aspect, wherein heating means for heating substantially the entire bottom outer surface of the pan is arranged.

[0012]

According to the first aspect of the present invention, since the temperature detecting means is fixedly provided outside the pot housing and at the contact portion with the curved portion on the outer periphery of the bottom of the pot, the temperature detecting means is provided from the inner surface of the pot housing. The temperature detecting means does not protrude, and does not hinder the cleaning of the inside of the pot housing.

[0013] According to the second aspect of the present invention, the temperature detecting means is provided outside the pot housing portion and at a contact portion with the curved portion on the outer periphery of the bottom portion of the pot, so that the temperature is detected from the inner surface of the pot housing portion. The detection means does not protrude, and does not hinder the cleaning of the inside of the pot housing. In addition, there is no gap between the periphery of the temperature detecting means and the pot housing portion, and it is possible to avoid deterioration of the cleanability due to foreign matter entering through the gap.

Further, according to the configuration of the third aspect, it is possible to know the difference in the contact state when the pan is stored in the pan storage section, depending on the state of the detected temperature of each temperature detecting means. Therefore, it is possible to appropriately perform the transition from cooking rice to spotted rice.

According to the fourth aspect of the present invention, substantially the entire bottom outer surface of the pot is heated by the heating means without being affected by the temperature detecting means, since the temperature detecting means is provided outside the pot housing. It can be heated uniformly.

[0016]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 8 show an embodiment of the present invention. In the drawings, reference numeral 11 denotes a container main body having an open upper surface, and the container main body 11 includes an inner case 12 and a plastic outer case.
The inner case 12 is formed of an aluminum member having a good thermal conductivity and a low thermal emissivity. In addition, a concave bottom portion 14 is formed in the inner case 12, and a contact portion 16 having a slope with an inclination angle α = 45 ° is formed between the bottom portion 14 and the substantially cylindrical side portion 15. . On the other hand, reference numeral 17 denotes a bottomed cylindrical container which has an open upper surface and is removably accommodated in the inner case 12 which is a pan accommodating portion. The container 17 serving as a pan is made of an aluminum member having good thermal conductivity and a low thermal emissivity, and a bottom 18 having a center formed in a substantially convex shape at a high center, and an R shape formed on the outer periphery of the bottom 18. A curved portion 19 serving as an outer peripheral portion, a substantially cylindrical side portion 20 formed above the curved portion 19, and a flange portion 21 formed by bending an upper end of the side portion 20 outward; When the curved portion 19 comes into contact with the contact portion 16, the container 17 is stored in the inner case 12 in a mounted state.

Reference numeral 22 denotes a radiant heat radiating plate which is provided so as to cover the bottom portion 14 of the inner case 12 and is opposed to the bottom portion 18 of the container 17 in a non-contact state. This radiant heat radiating plate 22
Is made of a heat-resistant stainless steel, is provided so that the height of the upper surface thereof and the upper end of the bottom portion 14 are substantially equal to each other so as to eliminate a step with the inner surface of the inner case 12, and the lower portion 23 is a heating element. Spiral sheath heater 24 as heating means
Are fixed by a brazing portion 25 such as nickel brazing. On the radiant heat radiating plate 22 and the bottom 18 of the container 17,
A heating space 26 having a width of about 3 mm is formed, and a storage space 27 is formed in the radiant heat radiating plate 22 and the bottom portion 14 of the inner case 12.
Further, a space 28 is formed on the side portion 15 of the inner case 12 and the side portion 20 of the container 17 so as to communicate with the heating space 26.

Reference numeral 29 denotes a heat shield made of a steel plate attached to the bottom 14 of the inner case 12 to prevent loss due to heat radiation from the bottom 14 to the outside. The temperature sensors 31A and 31A are provided on the outer periphery of the heat shield plate 29 outside the inner case 12.
B and 31C are provided in a fixed manner with a sensor pressing plate 30, and three temperature sensors 31A, 31B and 31C serving as temperature detecting means are connected to the contact portions via the sensor pressing plate 30.
It is attached so as to abut the outside of 16. These temperature sensors 31A, 31B, 31C are arranged near the outside of the contact portion 16 and on the opposite side of the sheath heater 24 from the portion where the contact portion 16 and the curved portion 19 abut. Container 17
Temperature sensors 31A, 31B, and 31C are selected to have substantially the same temperature and resistance characteristics.
Temperature sensors 31A, 31B, 31C are evenly arranged at intervals of 0 °.

The upper end between the inner case 12 and the outer case 13 is
Frame 32 made of polyamide or the like containing filler
Joined by A hinge part 33 having a shaft part is formed on one side of the frame body 32, and a lid body pivotally supported by the hinge part 33 is formed.
34 is provided so as to openably and closably cover the upper opening of the main body 11. Reference numeral 35 denotes a concave exposure receiving portion provided near the hinge portion 33 and integrally formed with the frame 32. The lid body 34 is composed of an outer lid 36 and an inner lid 37 fixed below the outer lid 36 and covering the upper opening of the container 17.
Cover packings 38 and 39 are interposed between the inner cover 37 and the inner cover 37 and between the inner cover 37 and the flange portion 21 of the container 17, respectively. And
Inside the outer lid 36, a lid heater 40 composed of a cord heater or the like is provided, and a steam port 41 is provided.

On the other hand, the inner lid 37 is made of an aluminum plate having good heat conductivity, and has a through hole 44 into which the inner lid retainer 43 is inserted into a substantially horizontal center portion 42, and six steam holes 45. At the same time, four vapor holes 47 for dew collection are separately formed on an outer peripheral portion 46 located below the central portion 42. Each steam hole 45,
47 are evenly spaced and have a diameter of 3 mm or more, for example, the diameter of the steam hole 45 is 5.2 mm,
47 has a diameter of 3.6 mm. Also, the steam vent
It is desirable to form three or more of 45 and 47. The inner lid 37
Is a non-adhesive fluororesin coating layer 48 on the lower surface side to improve the cleaning property and appearance.
Is formed, and an alumite layer 49 is formed on the upper surface side by alumite treatment in order to secure corrosion resistance. Reference numeral 50 denotes a body heater provided outside the side portion 15 of the inner case 12.

Next, the configuration will be described with reference to the block diagram shown in FIG. On the input side of the microcomputer 51, the temperature sensors 31A, 31B and 31C are separately connected. On the output side of the microcomputer 51, a heater driving circuit including a bidirectional thyristor is provided.
The sheath heater 24, the lid heater 40, and the body heater 50 are connected via 52. Reference numeral 53 denotes a timing circuit such as a timer connected to the microcomputer 51. The timing circuit 53 and the temperature sensors 31A, 31B, 31
Based on each input signal from C, power cutoff control of each heater 24, 40, 50 is performed.

Next, the operation of the above configuration will be described in detail with reference to FIG.
This will be described with reference to the flowchart of FIG. 7 and the graph of FIG. In addition, the graph shown in FIG. 8 shows the temporal change of the temperature detected by each of the temperature sensors 31A, 31B, 31C, and the lower graph shows the timing of the power cut-off of the sheathed heater 24.

After storing a predetermined amount of rice and water in the container 17,
The container 17 is accommodated in the inner case 12, and the lid 34 is closed.
In this state, a rice cooking operation is started by pressing a rice cooking start key (not shown) or the like. At the beginning of rice cooking,
First, a 15-minute cooking process is performed. That is,
As shown in the flowchart of FIG. 6, in step S1, the microcomputer 51, which is the control means, energizes the sheathed heater 24 via the heater driving circuit 52, and the timer circuit 53
To determine whether five minutes have elapsed (step S
2) After 5 minutes, the sheath heater 24 is turned off (step S3). Then, the process proceeds to step S4,
This state is maintained for 10 minutes. Therefore, the temperatures detected by the temperature sensors 31A, 31B, 31C rise at first, and fall after the sheath heater 24 is cut off.

When the rice cooking process is completed, the rice cooking process is started.
24 is turned on again. Next, the process proceeds to step S6, where the microcomputer 51 determines that the temperature sensors 31A, 31
It is determined whether the detected temperatures of B and 31C have reached 100 ° C. or more. Then, in this step S6, the detected temperatures of all the temperature sensors 31A, 31B, 31C are 100
° C or more, and if it is determined that the container 17 is at the time of boiling, it is determined whether or not one minute has elapsed in step S7, and the process returns to step S7 until one minute has elapsed, and the sheath heater 24 is energized. The state is maintained, and if one minute has elapsed, the process proceeds to step S8. In step S8, the sheath heater 24 is turned off. If 30 seconds have elapsed, the sheath heater 24 is energized again (steps S9 and S10), and it is determined whether 30 seconds have elapsed in this state (step S1).
1). Then, if 30 seconds have elapsed, the process proceeds to step S12, and it is determined whether or not all the detected temperatures of the temperature sensors 31A, 31B, 31C have reached 118 ° C. or higher. At this time,
If at least one of the temperatures detected by the temperature sensors 31A, 31B, 31C has not reached 118 ° C., the process returns to step S8, and the sheath heater 24 is turned on in accordance with the procedure of steps S8 to S11.
Is carried out every 30 seconds.
On the other hand, if the temperatures detected by the temperature sensors 31A, 31B, 31C all reach 118 ° C., it is determined that the container 17 has dried up, and the swinging process from step S13 shown in the flowchart of FIG. 7 is performed. .

The blurring process is performed for 15 minutes. First, it is determined whether three minutes have elapsed after the sheath heater 24 has been turned off in step S13 (step S14). And
If three minutes have elapsed, the sheath heater 24 is energized (step S15), and the process proceeds to step S16 to determine whether 30 seconds have elapsed. Thereafter, when 30 seconds have elapsed, the sheath heater 24 is turned off again in step S17, and it is determined whether 11 minutes and 30 seconds have elapsed in this state (step S18). When 11 minutes and 30 seconds have elapsed, the swing process is terminated, and the process automatically shifts to the heat-retention process by the power cutoff control of the lid heater 40 and the body heater 50.

During these series of rice cooking operations, the sheathed heater
When the heat is generated by energization, the heat radiated from the surface of the sheath heater 24 is conducted to the bottom portion 14 of the aluminum inner case 12 via the storage space 27, and the entire inner case 12 is quickly heated. At this time, the contact portion 16 of the inner case 12 and the curved portion 19 of the container 17 are in contact with each other, and the container 17 is made of an aluminum member having excellent heat conductivity and a low thermal emissivity, like the inner case 12. Then, the amount of heat radiation from the inner case 12 to the outer space is reduced, and the heat of the inner case 12 is taken by the container 17 from the curved portion 19 via the contact portion 16, and the outer portion of the container 17 is quickly heated. Further, the heat from the sheath heater 24 is secondarily radiated as radiant heat from the upper portion of the radiant heat radiating plate 22 to the heating space 26, and uniformly heats the bottom portion 18 of the container 17, so that the entire container 17 is efficiently produced as a result. Heated.

The temperature detected by each of the temperature sensors 31A, 31B, and 31C depends on the difference in the contact state between the contact portion 16 and the curved portion 19 when the container 17 is housed in the inner case 12. Does not match as shown. This is the contact 16
When the contact state between the contact portion 16 and the curved portion 19 is complete, the heat around the contact portion 16 is taken away by the water contained in the container 17, and the detected temperatures of the temperature sensors 31A, 31B, 31C located near the contact portion 16 are low. On the contrary, if the contact state between the contact portion 16 and the curved portion 19 is incomplete, the temperature around the contact portion 16 rises,
This is because the detected temperatures of the temperature sensors 31A, 31B and 31C located in the vicinity are high, and the temperature sensors with low detected temperatures
It can be said that 31C detects the temperature of the container 17 more accurately than the other temperature sensors 31A and 31B. In order to prevent the determination procedure from becoming complicated with respect to the difference between the detected temperatures, the microcomputer 51 sets the detected temperatures of all the temperature sensors 31A, 31B, 31C to a predetermined temperature, for example, as in steps S6 and S12. By determining whether or not the above has occurred, the control is performed using the temperature sensor 31C having the lowest detected temperature as a criterion.

During the rice cooking operation, since the fluororesin coating layer 48 is formed on the lower surface of the inner lid 37, water or steam generated in the container 17 adheres to the coating layer 48 as substantially spherical water droplets. On the other hand, the coating layer 48
The water droplets adhering to the water and the foamy water that has been blown up by the steam pressure during cooking enter the upper portion of the inner lid 37 through the steam hole 45. The shape of the inner lid 37 is formed so that the central part 42 is higher than the outer peripheral part 46, and the water and the like protruding from the steam hole 45 are
While flowing naturally from the central part 42 to the outer peripheral part 46 by some vibration, the pressure increase in the space formed between the outer lid 36 and the inner lid 37 is suppressed, preventing spillage from the steam port 41, and It does not prevent the intrusion of water from the steam hole 45. Further, since the number of the vapor holes 47 is three or more and the diameter thereof is at least 3 mm or more, the probability that water droplets adhering to the coating layer 48 are formed near the vapor holes 47 increases. Therefore, the water droplets on the coating layer 48 side adhering to the vicinity of the steam hole 47 suck the soda water flowing to the outer peripheral portion 46, and the soda water on the upper part of the inner lid 37 falls down the steam hole 47,
It is again collected in the container 17 in a short time, and the amount of dew dropping from the inner lid 37 to the dew receiving portion 35 when the lid 34 is opened is reduced. At this time, even if the rice cooker itself is inclined,
Since 45 and 47 are arranged evenly with respect to the center of the inner lid 37,
Regardless of the mounting position of the inner lid 37, the water in the upper part of the inner lid 37 that enters through the steam hole 45 surely flows around the steam hole 47.

As described above, in the above embodiment, the temperature sensors 31A, 31B and 31C for detecting the temperature of the
Outside, and fixedly provided at the contact portion 16 with the curved portion 19 on the outer periphery of the bottom portion 18 of the container 17, so that the temperature sensors 31A, 31B, 31C do not protrude from the inner surface of the inner case 12,
It does not get in the way when cleaning the inner case 12. Further, no gap is formed between the surroundings of the temperature sensors 31A, 31B, 31C and the inner case 12, and the temperature sensors 31A, 31B,
Since the 31C is provided on the outside of the inner case 12, it is possible to avoid the deterioration of the cleaning performance due to the intrusion of foreign matter from the gap.

Further, in the present embodiment, the temperature sensors 31A,
A plurality of temperature sensors 31A, 31 are provided with a plurality of 31B, 31C.
The microcomputer 51 is configured to shift from rice cooking to spotting in accordance with the detected temperature conditions of B and 31C. Thereby, it is possible to know the difference in the contact state when the container 17 is housed in the inner case 12, depending on the state of the detected temperatures of the temperature sensors 31A, 31B, 31C. Therefore, the microcomputer 51 can appropriately perform the transition from the rice cooking to the steaming.

In this embodiment, since the sheath heater 24 is disposed so as to heat substantially the entire outer surface of the bottom portion 18 of the container 17, the temperature sensors 31A, 31B and 31C are connected to the inner case 12
Temperature sensors 31A, 31
Almost the entire outer surface of the bottom portion 18 of the container 17 can be uniformly heated by the sheath heater 24 without being affected by B and 31C.

Further, as an effect of the present embodiment, since heating to the bottom 18 of the container 17 is performed by radiant heat from the radiant heat radiating plate 22, even if rice particles or the like adhere to the upper portion of the radiant heat radiating plate 22, the bottom 18 is heated. There is no danger of lowering the heating capacity of the heat sink. The radiant heat downward from the sheath heater 24 heats the bottom portion 14 of the inner case 12, and the heat of the inner case 12 is
To the container 17 to obtain the effect of heating the outer portion of the container 17, and because the inner case 12 and the container 17 are both made of aluminum having excellent thermal conductivity and a low thermal emissivity, By suppressing the amount of heat radiation from 12 to the external space, the side portion 20 of the container 17 can be efficiently and uniformly heated. Further, since the temperature sensors 31A, 31B and 31C for detecting the temperature of the container 17 are all provided outside the inner case 12, the bottom portion 18 of the container 17 is different from the conventional case.
However, the heating of the bottom portion 18 and the side portion 20 can be improved by uniformly heating the entire bottom portion 18 without causing partial heating shortage. That is, the heating efficiency of the water in the container 17 at the time of cooking the maximum amount of white rice is 80 to 85% in the radiant heating type rice cooker and 78 to 83% in the hot plate type rice cooker in the conventional example. Thus, in the rice cooker of this embodiment, it is increased to about 87%.

Further, each of the temperature sensors 31A, 31B, 31C
Is near the outside of the contact portion 16, and the contact portion 16 and the curved portion
Since the portion 19 is disposed on the opposite side of the sheath heater 24 from the contacting portion, it is hardly affected by the heat from the sheath heater 24, and the detection accuracy when detecting the temperature of the container 17 can be improved.

Further, since the contact portion 16 of the inner case 12 located on the outer peripheral portion of the sheathed heater 24 is formed at an inclination angle α = 45 °, dirt, water and the like hardly accumulate on the contact portion 16.
Moreover, the radiant heat radiating plate 22 closes the bottom 14 of the inner case 12,
The inner case 12 is provided so as to eliminate a step with the inner surface thereof. Since the inner surface of the inner case 12 is formed flat, the cleanability thereof can be greatly improved.

Further, in the inner lid 37 on which the non-adhesive coating layer 48 is deposited, three or more steam holes 45 and 47 are provided in the central part 42 and the outer peripheral part 46 of the inner lid 37, respectively.
By forming the diameter of each steam hole 47 to be 3 mm or more, the suction water of the water droplets adhering to the coating layer 48 is used to smoothly and quickly drain the water from the upper portion of the inner lid 37.
It becomes possible to drop the container 47 from the container 47. Accordingly, the amount of dew dropping from the inner lid 37 to the dew receiving portion 35 when the lid 34 is opened is reduced, and the dirt on the dew receiving portion 35 is reduced, so that the cleanability can be improved.

The present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention. For example, in the embodiment, the temperature of the container 17 is detected using three temperature sensors 31A, 31B, and 31C, but the number of the temperature sensors can be changed as appropriate.

[0037]

In the rice cooker according to the first aspect of the present invention, the temperature detecting means for detecting the temperature of the pan is in contact with the curved portion on the outer periphery of the bottom of the pan outside the pan accommodating portion for accommodating the pan. In the configuration provided with the temperature detecting means, which is fixedly provided in the pan, the temperature detecting means does not protrude from the inner surface of the pan storing section, thereby providing a rice cooker which does not deteriorate the cleanability of the pan storing section.

In the rice cooker according to the second aspect, the temperature detecting means for detecting the temperature of the pan is formed without forming a gap around the temperature detecting means between the temperature detecting means and the pan accommodating portion for accommodating the pan. To
It is provided outside the pot housing portion and at a contact portion with a curved portion on the outer periphery of the bottom of the pan, and in a configuration including the temperature detection device, the temperature detection device does not protrude from the inner surface of the pot storage portion. Moreover, since no gap is formed between the periphery of the temperature detecting means and the pot housing, a rice cooker that does not further deteriorate the cleaning property of the pot housing can be provided.

According to a third aspect of the present invention, in the rice cooker according to the first or second aspect, a plurality of the temperature detecting means are provided, and a plurality of the temperature detecting means are provided in accordance with detected temperature conditions.
In this case, it is possible to shift from rice cooking to spotting. In this case, the shift from rice cooking to spotting can be appropriately performed.

A rice cooker according to a fourth aspect of the present invention is the rice cooker according to the first or second aspect, further comprising a heating means for heating substantially the entire bottom outer surface of the pan. Without being affected by the detecting means, substantially the entire bottom outer surface of the pan can be uniformly heated by the heating means.

[Brief description of the drawings]

FIG. 1 is an overall sectional view of a rice cooker showing one embodiment of the present invention.

FIG. 2 is a sectional view of a main part of the above.

FIG. 3 is a front view of the same inner lid.

FIG. 4 is a partially enlarged sectional view of a main part of the above.

FIG. 5 is a block diagram showing the same.

FIG. 6 is a flowchart of the same.

FIG. 7 is a flowchart of the same.

FIG. 8 is a graph showing a temperature change and a power cutoff control of a sheathed heater during rice cooking.

FIG. 9 is a sectional view showing an example of a conventional rice cooker.

FIG. 10 is a sectional view showing an example of a conventional rice cooker.

[Explanation of symbols]

 12 Inner case (pan storage section) 16 Contact section 17 Container (pan) 19 Curved section 24 Seeds heater (heating means) 31A, 31B, 31C Temperature sensor (temperature detection means)

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takashi Tsurumaki 2570-1, Gosuda, Oaza, Kamo-shi, Niigata Pref. Toshiba Home Techno Co., Ltd. (56) References JP-A-56-143118 (JP, A) Akira Mikai 59-67130 (JP, U) JP-A 2-146522 (JP, U) JP-A 38-11037 (JP, Y1) (58) Fields investigated (Int. Cl. ⁷ , DB name) A47J 27/00 103

Claims (4)

(57) [Claims] 1. A temperature detecting means for detecting a temperature of a pot is fixedly provided outside a pot accommodating portion for accommodating the pan and at a contact portion with a curved portion on an outer periphery of a bottom of the pan. And rice cooker. 2. A temperature detecting means for detecting the temperature of the pot, wherein a gap is not formed around the temperature detecting means between the pot containing section and the pot containing section, and outside the pot containing section, And a rice cooker provided at a contact portion with a curved portion on the outer periphery of the bottom of the pan. 3. The rice cooker according to claim 1, wherein a plurality of the temperature detecting means are provided, and the rice cooker shifts from rice cooking to rice spotting in accordance with the temperature detected by the plurality of temperature detecting means. 4. The rice cooker according to claim 1, further comprising a heating means for heating substantially the entire bottom outer surface of the pan.