JP2018175759A - Rice cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rice cooker capable of automatically closing a lid part which is opened while heat insulation.SOLUTION: A rice cooker includes: a body part in which an inner pot is stored so as to be put in/taken out from above; a lid part for opening/closing an upper part of the body part; lid opening/closing detection means for detecting opening/closing of the lid part; heating means for heating the inner pot stored inside the body part; a first sensor for detecting the temperature of the inner pot; lid drive means for applying a closing operation to the lid part; and control means for, when opening of the lid part is confirmed by detection of the lid opening/closing detection means during heat insulation, reading the temperature of the inner pot detected by the first sensor, and when the temperature becomes a first preset temperature or lower, allowing the lid drive means to close the lid part.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a rice cooker.

  As a conventional rice cooker, heat the rice under heat holding control at low temperature holding temperature with little heat holding deterioration and heat the rice under the optimum heating condition based on the number of heat holding when raising the rice quickly from the low temperature holding temperature to the high temperature holding temperature (See, for example, Patent Document 1). Since this rice cooker can suppress the heat retention deterioration of the cooked rice and can also sterilize it, it is possible to provide delicious kept warm rice.

Patent No. 2820046

  However, in such a rice cooker, the focus is only on the quality of cooked rice when the lid is closed, and the lid that was accidentally opened remains as it is, or the lid has forgotten to be closed. In the case, it was difficult to maintain the quality of cooked rice.

  The present invention has been made to solve the problems as described above, and it is an object of the present invention to provide a rice cooker capable of automatically closing a lid opened during heat retention.

  The rice cooker according to the present invention comprises a main body in which the inner pot can be freely inserted and removed from the upper part, a lid for opening and closing the upper part of the main body, lid opening / closing detection means for detecting opening and closing of the lid, The heating means for heating the inner pot housed, the first sensor for detecting the temperature of the inner pot, the lid driving means for giving a closing operation to the lid, and the opening and closing of the lid by detection of the lid opening / closing detection means during heat retention And the control means for reading the temperature of the inner pot detected by the first sensor and causing the lid driving means to close the lid when the temperature falls below the first set temperature.

  In the present invention, when the opening of the lid is confirmed by the detection of the lid opening / closing detection means during heat retention, the temperature of the inner pot detected by the first sensor is read, and the temperature falls below the first set temperature The lid is closed by the lid driving means. By this control, the lid opened during heat retention can be automatically closed, and the deterioration of the quality of cooked rice can be suppressed.

It is a front view of the rice cooker which concerns on Embodiment 1 of this invention. It is AA sectional drawing of the rice cooker shown in FIG. It is a rear view of the rice cooker shown in FIG. It is a perspective view of the rice cooker of the state which open | released the cover part shown in FIG. It is a perspective view of the general | schematic structure of the lid drive means shown in FIG. It is a side view of the lid drive means shown in FIG. It is a block diagram which shows schematic structure of the rice cooker which concerns on Embodiment 1 of this invention. In the rice cooker which concerns on Embodiment 1 of this invention, it is a flowchart which shows operation | movement with respect to the cover part opened during heat retention. It is a cross-sectional view of the rice cooker which concerns on Embodiment 2 of this invention. It is a perspective view of the rice cooker of the state which open | released the cover part shown in FIG. It is a block diagram which shows schematic structure of the rice cooker which concerns on Embodiment 2 of this invention. In the rice cooker which concerns on Embodiment 2 of this invention, it is a flowchart which shows operation | movement with respect to the cover part opened during heat retention.

Embodiment 1
1 is a front view of a rice cooker according to Embodiment 1 of the present invention, FIG. 2 is a cross-sectional view of the rice cooker shown in FIG. 1 taken along the line A-A, FIG. 3 is a rear view of the rice cooker shown in FIG. It is a perspective view of the rice cooker of the state which open | released the cover part shown in FIG.
1 to 4, the rice cooker 100 according to the first embodiment includes a main body portion 10 having an opening at the upper portion, an inner hook 21 accommodated in an openable and retractable manner from the opening of the main body portion 10, and the main body portion 10. And a lid 30 for opening and closing the upper part. The main body portion 10 is provided with a box-shaped main body case 11 whose upper surface is opened, and an upper frame 12 which is horizontally provided from the upper portion of the main body case 11 to the opening side and which opens and removes the inner hook 21. And the outer frame is formed.

  The main body portion 10 includes a cylindrical inner heat shield plate 13, a body heater 14 provided on the outer peripheral surface of the inner heat shield plate 13, and a substantially bowl-shaped coil disposed below the inner heat shield plate 13. A pedestal 15, a spiral induction heating coil 16 disposed on the outer surface of the coil pedestal 15, a temperature sensor 17 which is a first sensor disposed at the center of the coil pedestal 15, a power supply substrate 18, a lid An open / close button 19 is provided. The internal heat shield 13 and the coil base 15 form an internal hook storage portion 20 in which the internal hook 21 is freely accommodated. The upper opening of the inner hook storage portion 20 has substantially the same size as the opening formed by the upper frame 12 of the main body case 11.

  The induction heating coil 16 generates an alternating magnetic field by the high frequency current from the power supply substrate 18, and induction heats the inner pot 21 stored in the inner pot storage portion 20. The body heater 14 is energized at the time of rice cooking and heat retention to generate heat and heat the inner pot 21. The temperature sensor 17 is made of, for example, a thermistor, and abuts on the bottom of the inner hook 21 housed in the inner hook housing 20 to detect the temperature of the inner hook 21.

  The power supply substrate 18 is disposed at the rear in the main body 10 as seen from the front (the surface on which the lid opening / closing button 19 is installed) of the main body 10, and is covered by the power substrate cover 22. The lid opening / closing button 19 is provided on the front of the main body case 11. The lid opening / closing button 19 engages with the lid 30 when the lid 30 is closed, holds the lid 30 in the closed state, and engages with the lid 30 when pressed to the heel side. The cover 30 is released to release the lid 30.

  A third sensor, for example, a human sensor 40 is provided on the front of the main body case 11. For example, as shown in FIGS. 1 and 4, the human sensor 40 is attached to the front of the main body case 11 at a position on the right side of the lid opening / closing button 19. The human sensor 40 is activated when the lid 30 is opened during heating of cooked rice, and is provided to detect a human body in front of the rice cooker 100. An illuminance sensor may be used instead of the human sensor 40.

  Further, under the upper frame 12 of the main body portion 10, for example, a micro switch 43 which is a lid open / close detection unit is provided. For example, as shown in FIG. 4, the micro switch 43 is positioned at the right corner on the front side of the upper frame 12 as viewed from above the upper portion of the main body 10, and vertically penetrates the upper frame 12. The actuator unit 43a is provided. The actuator portion 43a moves downward when the actuating body 43b described later abuts, and turns on the internal contact of the micro switch 43.

  The lid 30 is provided on the upper portion of the main body 10 so as to be openable and closable by a hinge shaft 23. On the side wall 30a of the front of the lid 30, for example, an LED 41 as a notification means is installed. The LED 41 is lit or blinked when the lid 30 is closed by the lid driving means 50 provided on the hinge shaft 23 side of the lid 30. The lid driving means 50 will be described later.

  An inner lid 31 is removably attached to an inner frame 30 b provided inside the lid 30. A lid heater 33 is provided on the back surface of the inner frame 30b. The lid heater 33 is energized at the time of rice cooking and heat retention, and heats the inner lid 31 via the inner frame body 30b. Further, a steam port 32 is provided at a position on the hinge shaft 23 side of the lid 30, and an operation display unit 34 is provided on the front side of the lid 30. The heating means in the present invention is constituted by the body heater 14, the induction heating coil 16 and the lid heater 33 described above.

  The operation display unit 34 includes an operation unit 34a having switches such as a rice cooking key, a heat retention key, and a menu selection key, and a display window 34b. The display window 34 b is provided at a position facing the display unit 35 installed inside the lid 30. The display unit 35 is mounted on the operation display substrate 36, and displays a rice cooking function, a rice cooking operation, and the like according to the above-described key operation. A control circuit is mounted on the operation display board 36. The control circuit outputs a control signal to the power supply board 18 in response to an operation signal from the operation unit 34a, and displays a cooking function based on the operation signal on the display unit 35. . The control circuit will be described later.

  The inner frame 30 b of the lid 30 is provided with a fourth sensor, for example, an infrared sensor 42. For example, as shown in FIG. 4, the infrared sensor 42 is attached to the upper left corner of the inner frame 30 b. The infrared sensor 42 is activated when the lid 30 is opened during heating of cooked rice, and is provided to detect heat (infrared) emitted from the arm or hand of the user. That is, the infrared sensor 42 is directed downward so that, for example, the region of the upper front half of the main body 10 can be detected when the lid 30 is in the open state. At the upper right corner of the inner frame 30b, there is provided an operating body 43b which is brought into contact with the actuator portion 43a of the micro switch 43 described above and is moved downward when the lid 30 is closed.

Here, the configuration of the lid driving means 50 described above will be described with reference to FIGS. 5 and 6.
FIG. 5 is a perspective view of the schematic structure of the lid driving means shown in FIG. 3, and FIG. 6 is a side view of the lid driving means shown in FIG.
The lid driving means 50 is disposed on the rear left side in the main body case 11 when the main body portion 10 is viewed from the front (see FIG. 3), for example, as shown in FIGS. , 53, 54, 55, 56, respectively. The gear 52 is attached to the rotation shaft of the motor 51 and meshes with the gear 53. The gear 54 is composed of two cylindrical gears 54a, 54b of different diameters, of which the gear 54a meshes with the gear 53. The gear 55 has a diameter larger than that of the gear 54, and is constituted by two cylindrical gears 55a and 55b having different diameters. Among them, the gear 55a meshes with the gear 54b described above, and the gear 55b meshes with the fan-shaped gear 56.

  The gear 56 is provided with teeth in the circumferential direction on the outer surface of the arc portion, and the flat hinge shaft 23 is inserted at a position that is the central angle of the arc portion. One end of the hinge shaft 23 is rotatably provided on the left side wall of the lid 30 when the main body 10 is viewed from the front. When the motor 51 rotates, the rotation is transmitted to the fan-shaped gear 56 through the four gears 52, 53, 54, 55, and the hinge shaft 23 is rotated in the closing direction of the lid 30. Although not shown, shafts rotatably supported in the main body case 10 are provided at both ends of the gear 53, the gear 54 and the gear 55.

Next, the circuit configuration of the rice cooker 100 of Embodiment 1 will be described based on FIG. 7.
FIG. 7 is a block diagram showing a schematic configuration of a rice cooker according to Embodiment 1 of the present invention.
The control circuit 60 is configured by, for example, a microcomputer. The control circuit 60 detects the closure of the lid 30 from the on signal of the micro switch 43, and starts the cooking operation according to the operation signal from the operation unit 34a. The control circuit 60 executes the steps of the preheating step, the rice cooking step, the steaming step, and the heat retention step according to, for example, a rice cooking menu, a rice cooking amount, a temperature of the inner pot 21 detected by the temperature sensor 17 or the like.

  For example, in the preheating step, the control circuit 60 controls the inverter drive circuit 62 so that the temperature of the inner pot 21 reaches the preheating temperature, and the preheating temperature is maintained when the temperature of the inner pot 21 reaches the preheating temperature. To control the inverter drive circuit 62. The control circuit 60 controls the inverter drive circuit 62 and the heater energization circuit 64 so that the temperature of the inner pot 21 reaches the boiling temperature in the rice cooking process. The control circuit 60 also stops control of the inverter drive circuit 62 and the heater energizing circuit 64 in the steaming process. Then, the control circuit 60 controls the inverter drive circuit 62 or the inverter drive circuit 62 and the heater energization circuit 64 again so that the temperature of the inner pot 21 becomes the heat retention temperature in the heat retention process after the steaming process.

  The inverter drive circuit 62 generates, for example, a PWM signal based on the control of the control circuit 60 and outputs the generated PWM signal to the inverter 63 so that a high frequency current flows in the induction heating coil 16. The heater energizing circuit 64 controls the amount of energization to the body heater 14 and the lid heater 33 based on the control of the control circuit 60.

  The control circuit 60 reads the temperature of the inner pot 21 detected by the temperature sensor 17 when the opening of the lid 30 is confirmed from the off of the micro switch 43 during heat retention of cooked rice, and the read temperature is the first set temperature (for example, The lid driving means 50 is driven to close the lid 30 when the temperature becomes 58 ° C. or lower, which is lower than the heat retention temperature. When the lid 30 is closed by the lid driving means 50, the control circuit 60 lights up the LED 41, for example, and uses a speaker 61, which is another informing means, to notify by voice that the lid 30 is closed. In place of the speaker 61, notification may be made by using a buzzer.

  The control circuit 60 reads the information detected by the human sensor 40 before the temperature of the inner pot 21 becomes 58 ° C. or lower, and when the human body is confirmed from the read information, the lid driving means 50 is not driven. , Maintain the open state of the lid 30. Further, the control circuit 60 reads the ambient temperature detected by the infrared sensor 42 before the temperature of the inner pot 21 becomes 58 ° C. or lower, and sets the second preset temperature higher than the ambient temperature (eg, When the skin temperature is detected to be 30 ° C. to 40 ° C., the lid 30 is maintained in the open state without driving the lid driving means 50.

  Furthermore, when detecting a change in load torque of the lid driving means 50, the control circuit 60 stops the driving of the lid driving means 50 and stops the closing operation of the lid 30. When stopping the closing operation of the lid 30, the control circuit 60 blinks the LED 41, for example, and uses a speaker 61 to notify by voice that the lid 30 is not closed due to an obstacle. The detection of the change of the load torque in the control circuit 60 determines that the load torque has changed, for example, when the rotation speed of the motor of the lid driving means 50 decreases or when the current flowing to the motor increases.

In the rice cooker 100 configured as described above, an operation of automatically closing the lid 30 opened during heat retention will be described based on the flowchart of FIG. 8.
FIG. 8 is a flow chart showing the operation of the lid portion opened during heat retention in the rice cooker according to Embodiment 1 of the present invention.

  When the control circuit 60 confirms the opening of the lid 30 from the off state of the micro switch 43 (step S1), the control circuit 60 determines whether the inner hook 21 is set in the inner hook storage 20 of the main body 10 (step S2). . This determination is made based on whether or not the induction heating coil 16 or the induction heating coil 16, the body heater 14, and the lid heater 33 are energized. The control circuit 60 ends the operation of FIG. 7 when it is determined that the inner hook 21 is not set, but determines whether or not heat retention is in progress when it is determined that the inner hook 21 is set (step S3).

  The control circuit 60 ends the operation of FIG. 7 when the heat retention is not being performed, that is, when the heat retention is canceled by the operation unit 34a, but when it is confirmed that the heat retention is being performed, a person (user ) Is determined (step S4). In this case, the control circuit 60 reads the information detected by the human sensor 40, and determines from the read information whether or not the human body has been confirmed. When the control circuit 60 determines that a person is in front of the rice cooker 100 based on the information from the human sensor 40, the control circuit 60 maintains the open state of the lid 30 without activating the lid driving means 50 (step S13). This maintains the open state of the cover 30 on the assumption that the user may eat rice with a rice scoop or the like.

  On the other hand, when the control circuit 60 determines that there is no person in front of the rice cooker 100 based on the information from the human sensor 40, whether the hand and / or arm of the person (user) has been confirmed or not It determines (step S5). In this case, the control circuit 60 reads the ambient temperature detected by the infrared sensor 42 and determines whether or not a second set temperature (30 ° C. to 40 ° C.) higher than the ambient temperature is detected in the ambient temperature. . The second set temperature is a human hand and / or arm temperature.

  When the control circuit 60 detects the second set temperature in the ambient temperature, it determines that rice is being eaten with a scissors or the like, and maintains the open state of the lid 30 without activating the lid driving means 50. (Step S13). On the other hand, when the control circuit 60 can not detect the second set temperature in the ambient temperature, it determines whether the temperature of the inner pot 21 is lower than the first set temperature (58 ° C.) (step S6). In this case, the control circuit 60 reads the temperature of the inner pot 21 detected by the temperature sensor 17, and when the read temperature exceeds the first set temperature (58 ° C.), the temperature of the cooked rice maintains the heat retention temperature. In the same manner as described above, the open state of the lid 30 is maintained (step S13).

  When the temperature of the inner pot 21 is equal to or lower than the first set temperature (58 ° C.), the control circuit 60 lights the LED 41 and gives a voice to notify that the lid 30 is closed by the speaker 61 (step S7). Then, the control circuit 60 activates the lid driving means 50 to perform the closing operation of the lid 30 (step S8). The control circuit 60 determines whether there is no obstacle before the lid 30 closes the upper portion of the main body 10 (step S9). The obstacle is, for example, a shuttle placed in the inner hook 21.

  When the control circuit 60 detects a change in load torque of the lid driving means 50 before the lid 30 is closed, the LED 30 blinks as the lid 30 is in contact with an obstacle, and the speaker 61 causes the lid 30 to fail. A voice informs that the object will not be closed (step S11). After the notification, the control circuit 60 stops the drive of the lid driving means 50 to stop the closing operation of the lid 30 (step S12), and ends the operation of FIG.

  On the other hand, when the control circuit 60 does not detect an obstacle, the control circuit 60 determines whether the lid 30 is closed (step S10). When the lid 30 is not closed, that is, when the micro switch 43 is off, the control circuit 60 repeats steps S8 to S10, and the micro switch 43 is switched from off to on without detecting an obstacle. When the lid 30 is closed, the operation of FIG. 7 ends.

  As described above, in the first embodiment, the temperature of the inner pot 21 detected by the temperature sensor 17 is the first set temperature after the opening of the lid 30 is confirmed after the micro switch 43 is turned off during the heat preservation of cooked rice. When the temperature becomes (58 ° C.) or less, the lid driving means 50 is activated to close the lid 30. By this control, the lid portion 30 opened during the heat retention can be automatically closed, and the deterioration of the quality of the cooked rice can be suppressed.

  Further, when the human body is confirmed from the information detected by the human sensor 40 before the temperature of the inner pot 21 becomes 58 ° C. or lower, the lid 30 is maintained in the open state without driving the lid driving means 50. I am trying to do it. By this control, the lid 30 does not close when the user tries to eat rice with a rice dumpling, and a convenient rice cooker can be provided.

  In addition, when the second set temperature (30 ° C. to 40 ° C.) higher than the ambient temperature is detected in the ambient temperature detected by the infrared sensor 42, the open state of the lid 30 is maintained. By this control, the rice cooker is highly safe without the inner lid 31 of the lid 30 coming into contact with the hand or arm and causing burns on the inner lid 31 when the user is eating rice with a rice dumpling. Can provide

  Furthermore, when a change in load torque of the lid driving means 50 is detected before the lid 30 is closed, the driving of the lid driving means 50 is stopped and the closing operation of the lid 30 is stopped. The lid drive means 50 itself can be protected without the motor 51 of the means 50 generating heat or burning.

Second Embodiment
In the first embodiment, the cover 30 in the open state is automatically closed when the temperature of the inner pot 21 becomes equal to or lower than the first set temperature after the cover 30 is opened during heat preservation of cooked rice. In the second embodiment, the lid 30 in the open state is automatically closed when a set time has elapsed since the lid 30 was opened during heat preservation of cooked rice. Hereinafter, description will be made using the drawings.
FIG. 9 is a cross-sectional view of a rice cooker according to Embodiment 2 of the present invention, FIG. 10 is a perspective view of the rice cooker with the lid shown in FIG. 9 in the open state, and FIG. It is a block diagram which shows schematic structure of the rice cooker which concerns. In addition, the same code | symbol is attached | subjected to the part the same as that of the rice cooker of Embodiment 1, or considerable part.

  The rice cooker 100 according to the second embodiment is provided with a temperature sensor 44 which is a second sensor that detects the internal temperature of the inner pot 21. The temperature sensor 44 is, for example, a thermistor, and is provided inside the lid 30 so as to protrude from the inner lid 31.

  The control circuit 60 according to the second embodiment reads the ambient temperature detected by the temperature sensor 44 when the open of the lid 30 is confirmed by the detection of the microswitch 43 (lid open / close detection means) during heat retention, The control unit is provided with control means for activating the lid driving means 50 and closing the lid 30 when a set time (for example, 30 seconds) has elapsed since the temperature became lower than the first set temperature (58 ° C.).

Next, in the rice cooker 100 according to the second embodiment, an operation of automatically closing the lid 30 opened during heat retention will be described based on the flowchart of FIG. 12.
FIG. 12 is a flow chart showing the operation of the lid portion opened during heat retention in the rice cooker according to Embodiment 2 of the present invention. In the flowchart shown in FIG. 12, only Step S6a and Step S6b are different from the flowchart of FIG. 8, so only the different Steps S6a and S6b will be described.

  The control circuit 60 does not have a person in front of the rice cooker 100 (step S4) and can not confirm the person's hand and / or the arm (step S5) during the heat preservation of the cooked rice. The ambient temperature detected by the sensor 44 is read, and it is determined whether the read ambient temperature has become equal to or lower than a first set temperature (58 ° C.) (step S6a). The ambient temperature is the temperature in front of the inner lid 31 when viewed from the temperature sensor 44 side with the lid 30 opened. When the ambient temperature exceeds the first set temperature, the control circuit 60 maintains the open state of the lid 30 without activating the lid driving means 50 (step S13), and returns to step S4.

  On the other hand, when the ambient temperature falls below the first set temperature, control circuit 60 determines whether or not the set time (30 seconds) has elapsed since the ambient temperature fell below the first set temperature (step S6b). ). That is, the control circuit 60 measures from the time when the ambient temperature falls below the first set temperature, and determines whether the measured time has passed 30 seconds. When the measured time has not passed 30 seconds, the control circuit 60 maintains the open state of the lid 30 without activating the lid driving means 50 (step S13), and returns to step S4.

  When the measured time passes 30 seconds, the control circuit 60 turns on the LED 41 as in the first embodiment and gives a voice notification that the lid portion 30 is closed by the speaker 61 (step S7). The driving means 50 is activated to perform the closing operation of the lid 30 (step S8), and the process proceeds to step S9.

  As described above, in the second embodiment, the time is measured when the ambient temperature detected by the temperature sensor 44 becomes lower than the first set temperature (58 ° C.), and the measured time has elapsed 30 seconds. At the same time, the lid driving means 50 is activated to perform the closing operation of the lid 30. By this control, the lid portion 30 opened during the heat retention can be automatically closed, and the deterioration of the quality of the cooked rice can be suppressed.

  In the first and second embodiments, the lid 30 opened during heat retention is automatically closed, but the lid 30 may not be closed automatically. For example, a release switch for releasing the closing operation of the lid 30 by the lid driving means 50 is provided in the operation unit 34a, and the lid driving means 50 is set not to close the lid 30 when detecting the operation of the release switch. The control circuit 60 is provided with the function of the control means. With this configuration, the lid 30 can be prevented from automatically closing. This is to prevent danger at homes with small children and to respect the will of the user.

  Further, the surface of the upper frame 12 may be covered with a sheet metal such as stainless steel, or the upper frame 12 may be formed of a sheet metal such as stainless steel.

  DESCRIPTION OF REFERENCE NUMERALS 10 main body portion 11 main body case 12 upper frame body 13 heat shield plate 14 body heater 15 coil base 16 induction heating coil 17 temperature sensor 18 power supply substrate 19 lid opening / closing button 20 inner hook storage portion , 21 inner hook, 22 power supply substrate cover, 23 hinge shaft, 30 lid portion, 30a lid side wall, 30b inner frame, 31 inner lid, 32 steam port, 33 lid heater, 34 operation display portion, 34a operation portion, 34b display window 35 display unit 36 operation display substrate 40 human sensor 41 LED 42 infrared sensor 43 micro switch 43a actuator 43b actuator 44 temperature sensor 50 lid driving means 51 motor 52 , 53 gears, 54, 55 cylindrical gears, 56 fan gears, 60 control circuits, 61 spins Car, 62 inverter control circuit, 63 an inverter, 64 a heater energizing circuit, 100 cooker.

Claims (7)

A main body portion in which the inner pot is freely accommodated from the upper part, and
A lid for opening and closing an upper portion of the main body;
Lid opening / closing detection means for detecting opening / closing of the lid;
Heating means for heating the inner pot housed in the main body;
A first sensor that detects the temperature of the inner pot;
Lid driving means for giving a closing operation to the lid;
If opening of the lid is confirmed by detection of the lid opening / closing detection means during heat retention, the temperature of the inner pot detected by the first sensor is read, and the temperature falls below the first set temperature. And a control means for closing the lid portion by a lid driving means. A main body portion in which the inner pot is freely accommodated from the upper part, and
A lid for opening and closing an upper portion of the main body;
Lid opening / closing detection means for detecting opening / closing of the lid;
Heating means for heating the inner pot housed in the main body;
A second sensor that detects the internal temperature of the inner pot;
Lid driving means for giving a closing operation to the lid;
If opening of the lid is confirmed by detection of the lid open / close detection means during heat retention, the temperature detected by the second sensor is read, and when the set time has elapsed from when the temperature falls below the first set temperature And a control means for closing the lid by the lid driving means. A third sensor provided on the front of the main body,
The rice cooker according to claim 1 or 2, wherein the control means reads information detected by the third sensor, and maintains the open state of the lid when the human body is confirmed from the information. A fourth sensor provided on the back surface of the lid;
The control means reads the ambient temperature detected by the fourth sensor, and maintains the open state of the lid when the second set temperature higher than the ambient temperature is confirmed in the ambient temperature. The rice cooker according to any one of claims 1 to 3, which is used. Equipped with notification means,
The rice cooker according to any one of claims 1 to 4, wherein the control means gives notification by the notification means when the lid is closed by the lid driving means.   6. The apparatus according to claim 1, wherein the control means stops the drive of the lid driving means and stops the closing operation of the lid when detecting a change in load torque of the lid driving means. The rice cooker according to any one of the above. And a release switch for releasing the closing operation of the lid portion by the lid driving means,
The rice cooker according to any one of claims 1 to 6, wherein the control means sets the lid portion not to close by the lid driving means when detecting the operation of the release switch. vessel.

Images