JP2012000351A - Rice cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rice cooker for detecting foreign matter caught between a temperature detection portion and a pot.SOLUTION: The rice cooker includes: an openable/closable lid 2 covering an upper opening of the lid;a lid temperature detection portion 5 located inside the lid and detecting the temperature of steam generated from the lid; a heater 3 for heating a bottom part of the pot; a pot temperature detection portion 4 detecting the temperature of the lid, and a controller 6. The controller, in a step of determining the number of cups of rice cooked to determine heat and temperature to cook based on the number of cups of rice cooked by determining the number of cups of rice cooked based on the time range from when the pot temperature detection portion reaches the predetermined temperature to when the lid temperature detection portion increases to the predetermined temperature, where the pot temperature detection portion drops to a temperature equal to or higher than the predetermined temperature when detecting a boiling in the pot by the lid temperature detection portion, determines the presence of the foreign matter between the pot temperature detection portion and the lid and changes the heat to cook in the step of determining the number of cups of rice cooked according to dropping temperature.

Description

  The present invention relates to a rice cooker used for general household or business use.

  Conventionally, this type of rice cooker uses a microcomputer to detect changes in temperature while measuring the temperature of the food, and when an abnormality is detected in the sensor, it controls the operation of the heater etc. so that rice can be cooked safely. Is generally used (see, for example, Patent Document 1).

  FIG. 8 shows a conventional rice cooker described in Patent Document 1. As shown in FIG. As shown in FIG. 8, a pot 201 for putting rice and water, a heating means 202 for heating the pot 201, a temperature detecting means 203 for detecting the temperature in the pot 201, and water in the pot 201 A boiling detection means 204 for detecting boiling, a first control storage means 205 for storing a process for controlling the heating means 202 to perform a normal rice cooking operation, and the heating means 202 when the rice cooking operation is abnormal. The second control storage means 206 and the process switching means 207 for storing the process for controlling the temperature receive the input from the boiling detection means 204, and after the water in the pan 201 has boiled, the temperature detection means 203 When the detected temperature falls below a predetermined temperature, the process of cooking rice is transferred from the first control storage means 205 to the second control storage means 206, and a constant weak heating power or the heating power is stopped. It is configured to to.

JP 9-308571 A

  However, in the above-described conventional configuration, when the temperature detected by the temperature detecting means falls below a predetermined temperature after the water in the pan has boiled, the thermal power is stopped or the charcoal is burned by making it a constant weak thermal power up to the cooking temperature. Although it can be prevented and cooked safely, it had the problem of not realizing the original function of a rice cooker to cook delicious rice.

  An object of the present invention is to solve the above-described conventional problems, and to provide a rice cooker that cooks delicious rice even if the temperature detection does not work well due to the presence of foreign matter between the pan temperature detection unit and the pan. To do.

  In order to solve the above-mentioned conventional problems, the rice cooker of the present invention includes a pan housed inside the rice cooker body, an openable lid that covers the top opening of the pan, and a heating device that heats the bottom of the pan. Heat from the temperature detected by the pan temperature detection unit that detects the temperature of the pan, the lid temperature detection unit that detects the temperature of water vapor that is in the lid and that is generated from the pan, and the pan temperature detection unit and the lid temperature detection unit And a control unit that controls the apparatus to perform the rice cooking operation, and the control unit calculates the number of rice cooked according to the time from when the pan temperature detection unit reaches a predetermined temperature until the lid temperature detection unit rises to the predetermined temperature. In the cooking rice total number determination process that determines the heating power and temperature to be cooked by the total number, when the pot temperature detection unit detects boiling inside the pot by the lid temperature detection unit, A foreign object is interposed between the temperature detector and the pan, allowing accurate temperature input. Can be determined not, it is to change by varying depending the cook-up thermal power determined in cooking if the number determined step to the falling temperature.

  This not only determines that there is a foreign object in the pan temperature detection unit by detecting how much the temperature of the pan temperature detection unit decreases when heating power corresponding to the number of rice cooked after boiling detection is given, but then By changing the cooked thermal power of the rice depending on the value of the lowered temperature, the misalignment width of the detected temperature of the pan temperature detection part due to foreign matter is finely detected to correct the wrongly determined rice cooking number and cook deliciously It can be cooked with the optimal heating power necessary for this purpose.

  In the rice cooker of the present invention, even when a foreign substance enters between the pan temperature detector and the pan, and the detected temperature cannot be detected accurately, the number of cooked rice determined by mistake is corrected, and in any rice cooked number, It can be cooked with the optimum heating power necessary to cook deliciously.

The block diagram of the rice cooker in Embodiment 1 of this invention. Sectional drawing of the rice cooker in Embodiment 1-3 of this invention Sequence diagram of various steps of rice cooker in Embodiment 1 of the present invention Block diagram of rice cooker in Embodiment 2 of the present invention Sequence diagram of various steps of rice cooker in Embodiment 2 of the present invention Block diagram of rice cooker in Embodiment 3 of the present invention Sequence diagram of various steps of rice cooker in Embodiment 3 of the present invention Block diagram of a conventional rice cooker

  1st invention detects the temperature of the pan stored in the inside of the rice cooker main body, the lid | cover which can be opened and closed which covers the upper opening part of the said pan, the heating apparatus which heats the bottom part of the said pan, and the said pan The heating device is controlled from the temperature detected by the pan temperature detection unit, the lid temperature detection unit that detects the temperature of water vapor that is in the lid and is generated from the pan, and the temperature detected by the pan temperature detection unit and the lid temperature detection unit And a control unit that performs the rice cooking operation, and the control unit calculates the number of rice cooked according to the time from when the pan temperature detection unit reaches a predetermined temperature until the lid temperature detection unit rises to the predetermined temperature. In the rice cooking total number determination step for determining the heating power and temperature to be cooked according to the total number, the pan temperature detection unit has fallen above a predetermined temperature when the lid temperature detection unit detects boiling inside the pan. In case, between the pan temperature detector and the pan Things determines that intervening temperature input has not been accurate, it is to change by varying depending the cook-up thermal power determined in cooking if the number determined step to the falling temperature.

  This not only determines that there is a foreign object in the pan temperature detection unit by detecting how much the temperature of the pan temperature detection unit decreases when heating power corresponding to the number of rice cooked after boiling detection is given, but then By changing the cooked thermal power of the rice depending on the value of the lowered temperature, the misalignment width of the detected temperature of the pan temperature detection part due to foreign matter is finely detected to correct the wrongly determined rice cooking number and cook deliciously It is possible to cook rice with the optimal heating power necessary for this.

  The second aspect of the invention is particularly the control unit of the first aspect of the invention, wherein the number of cooked rice is determined by the time from when the pan temperature detection unit reaches a predetermined temperature until the lid temperature detection unit rises to the predetermined temperature. In the rice cooking total number determination step for determining the heating power and temperature to be cooked according to the total number, the pan temperature detection unit has fallen above a predetermined temperature when the lid temperature detection unit detects boiling inside the pan. In this case, it is determined that a foreign matter is present between the pan temperature detection unit and the pan and the temperature input is not accurately performed, and the cooked thermal power determined in the rice cooking number determination step is varied according to the temperature drop. As well as changing the cooking temperature at a lower temperature than normal, the temperature of the pan temperature detection unit decreases when the heating power corresponding to the number of cooked rice is given after boiling detection. Detect In addition to determining that there is a foreign substance in the pan temperature detection part, by changing the subsequent cooking heat power according to the value of the reduced temperature, the deviation width of the detection temperature of the pan temperature detection part by the foreign substance Correcting the total number of rice cooked incorrectly by detecting it finely, and correcting the deviation of the cooking temperature by lowering the cooking temperature compared to the normal temperature, cooking with the optimal heating power necessary to cook deliciously You can cook rice at elevated temperature.

  The third aspect of the invention is particularly the control unit of the first aspect of the invention, wherein the number of cooked rice is determined by the time from when the pan temperature detection unit reaches a predetermined temperature until the lid temperature detection unit rises to the predetermined temperature. In the rice cooking total number determination step for determining the heating power and temperature to be cooked according to the total number, the pan temperature detection unit has fallen above a predetermined temperature when the lid temperature detection unit detects boiling inside the pan. In this case, it is determined that a foreign matter is present between the pan temperature detection unit and the pan and the temperature input is not accurately performed, and the cooked thermal power determined in the rice cooking number determination step is varied according to the temperature drop. The cooking operation after boiling detection is performed by changing the cooking temperature to the first temperature, which is lower than normal, and then lowering the cooking power and performing the cooking operation at the second temperature. According to the total number In addition to determining that there is a foreign object in the pan temperature detection unit by detecting how much the temperature of the pan temperature detection unit drops when applying power, the subsequent cooking heat power is reduced to the value of the reduced temperature 1st temperature which made the cooking temperature low compared with the normal time while correcting the number of rice cooking mistakenly detected by finely detecting the gap width of the detection temperature of the pan temperature detection part by a foreign substance by changing according to it To ensure the moisture in the pan and prevent scorching, and then reduce the cooking power and perform the cooking operation at the second temperature to prevent the scorching and sufficiently paste the rice. By promoting it, you can cook the rice deliciously giving the optimal heating power to gelatinize.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a block diagram of a rice cooker according to the first embodiment of the present invention, and FIG. 2 is a cross-sectional view of the rice cooker according to the first to third embodiments of the present invention.

  As shown in FIG. 1, a pot 1 for adding rice and water is heated by a heating device 3, and the temperature of the pot 1 is detected by a pot temperature detection unit 4, and the temperature of the water vapor generated from the pot 1 is detected. A detection unit 5 is provided, and the heating unit 3 is driven and controlled by the control unit 6 to perform rice cooking operation with a predetermined heating power. After the pan temperature detection unit 4 reaches a predetermined temperature, the lid temperature detection unit 5 rises to the predetermined temperature. The number of rice cooked is determined according to the time until cooking, and in the rice cooking number determination step for determining the heating power and temperature to be cooked based on the number, the pot temperature detection is performed when the lid temperature detection unit 5 detects boiling in the pot 1. When the part 4 falls below a predetermined temperature, it is determined that a foreign matter is present between the pan temperature detection unit 4 and the pan 1 and the temperature input is not accurately performed, and the cooked thermal power determined in the rice cooking number determination step Can be changed according to the temperature drop. It is configured to.

  In FIG. 2, the bottom temperature sensor 104 includes a temperature resistance element that converts a temperature change amount into a resistance value, is configured to move freely up and down, and is disposed in contact with the bottom surface of the pan 1. Similarly to the bottom temperature sensor 104, the lid temperature sensor 105 is composed of a temperature resistance element and detects the temperature change of the water in the pan 1.

  A heater 103 for heating the pot 1 and a control device 106 are input devices such as a rice cooking key, a cut key, the bottom temperature sensor, the lid temperature sensor, a driving device for driving the heater 103, and a liquid crystal display for displaying the cooking status. The device 101 is composed of a microcomputer or the like, and the control device 106 is incorporated in a circuit board and attached to a side surface inside the main body.

About the rice cooker comprised as mentioned above, the operation | movement and an effect | action are demonstrated below, referring FIG. FIG. 3 is a sequence diagram of various steps of the rice cooker according to the first embodiment of the present invention.

  First, in the water absorption process, the bottom heater 103 is heated so that the bottom temperature sensor 104 in the pan 1 is maintained at about 40 ° C. By maintaining the inside of the pan 1 at about 40 ° C. for 15 minutes, the rice can be gelatinized so that water is absorbed and no core remains in the rice.

  Next, it moves to a cooking process and heats the pan 1 with the maximum heating power (100% heating power). In this step, the water in the pan 1 is boiled, and the total number of cooked rice in the pan 1 is determined based on the time until the boiling. In the cooking process, if the lid temperature sensor 105 in the lid 2 reaches 90 ° C. when the water in the pan 1 boils and becomes steam, the process proceeds to the foreign matter detection step and 60% thermal power is applied.

  If there is no foreign matter such as rice grains between the bottom temperature sensor 104 and the pan 1, the bottom temperature sensor detects the temperature of the boiling pan even if the bottom heating power is lowered. Draw.

  However, when foreign matter such as rice grains is interposed between the bottom temperature sensor 104 and the pot 1, the bottom temperature sensor 104 is lowered by the ambient temperature around the bottom temperature sensor when the bottom thermal power is lowered. To do.

  Thereafter, when the bottom temperature sensor 104 starts to rise again, the process proceeds to the boiling maintaining step. In this foreign matter detection step, the temperature decrease width of the bottom temperature sensor 104 is measured, and the value is set as ΔT.

  Next, when the ΔT is less than 5 ° C., the heating power P in the boiling maintenance step is to give a heating power increased by 10% to the total number of cooked rice determined in the cooking step, and when ΔT is 5 ° C. or more and less than 10 ° C. Shall give a thermal power increased by + 20%, and when ΔT is 10 ° C. or higher and lower than 15 ° C., a thermal power increased by + 30% shall be applied.

  When ΔT is 15 ° C. or higher, the cooking temperature cannot be detected well and there is a risk of scorching, so heating is stopped, “sensor abnormality” is displayed on the liquid crystal display element 101, and heating is stopped. The heating power value P corrected by ΔT is given in the boiling maintenance step, heated to the cooking temperature, and cooked rice. When the bottom temperature sensor 104 reaches the cooking temperature, the process proceeds to the steaming step, and after cooking for 15 minutes, the cooking is finished.

  As described above, in the present embodiment, not only is it determined that there is a foreign substance in the pan temperature detection unit 4 by detecting how much the temperature of the pan temperature detection unit 4 after boiling detection is decreased, but also By changing the cooked thermal power according to the value of the reduced temperature, the misalignment width of the detected temperature of the pan temperature detection unit 4 due to foreign matter is finely detected to correct the number of rice cooking mistakenly determined and cook deliciously It is possible to cook rice with the optimal heating power necessary for this.

(Embodiment 2)
FIG. 4 is a block diagram of a rice cooker according to the second embodiment of the present invention.

  As shown in FIG. 4, the pot 1 in which rice and water are put is heated by the heating device 3, and the temperature of the pot 1 is detected by the pot temperature detection unit 4, and the temperature of the water vapor generated from the pot 1 is detected. A detection unit 5 is provided, and the heating unit 3 is driven and controlled by the control unit 7 to perform rice cooking operation with a predetermined heating power. After the pan temperature detection unit 4 reaches a predetermined temperature, the lid temperature detection unit 5 rises to the predetermined temperature. When the boiling temperature inside the pot 1 is detected by the lid temperature detection unit 5 in the rice cooking number determination step in which the total number of rice cooked is determined according to the time until it is done and the heating power and temperature to be cooked are determined by the total number, the pot temperature detection unit When 4 falls below a predetermined temperature, it is determined that a foreign matter is interposed between the pan temperature detection unit 4 and the pan 1 and the temperature input is not accurately performed, and the cooked thermal power determined in the rice cooking number determination step is determined. Change to change according to the temperature drop Rutotomoni, are configured to perform operations raised cooking at temperatures lower than the temperature raised cooking at normal.

  About the rice cooker comprised as mentioned above, the operation | movement and an effect | action are demonstrated below, referring FIG. FIG. 5 is a sequence diagram of various steps of the rice cooker according to the second embodiment of the present invention. First, the bottom heater 103 is heated so that the bottom temperature sensor 104 in the pan 1 is maintained at about 40 ° C. in the water absorption process. By maintaining the inside of the pan 1 at about 40 ° C. for 15 minutes, the rice can be gelatinized so that water is absorbed and no core remains in the rice.

  Next, it moves to a cooking process and heats the pan 1 with the maximum heating power (100% heating power). In this step, the water in the pan 1 is boiled, and the total number of cooked rice in the pan 1 is determined based on the time until the boiling. In the cooking process, if the lid temperature sensor 105 in the lid 2 reaches 90 ° C. when the water in the pan 1 boils and becomes steam, the process proceeds to the foreign matter detection step and 60% thermal power is applied.

  If there is no foreign matter such as rice grains between the bottom temperature sensor 104 and the pan 1, the bottom temperature sensor detects the temperature of the boiling pan even if the bottom heating power is lowered. Draw.

  However, when foreign matter such as rice grains is interposed between the bottom temperature sensor 104 and the pot 1, the bottom temperature sensor 104 is lowered by the ambient temperature around the bottom temperature sensor when the bottom thermal power is lowered. To do. Thereafter, when the bottom temperature sensor 104 starts to rise again, the process proceeds to the boiling maintaining step.

  In this foreign matter detection step, the temperature decrease width of the bottom temperature sensor 104 is measured, and the value is set as ΔT. Next, when the ΔT is less than 5 ° C., the heating power P in the boiling maintenance step is to give a heating power increased by 15% to the total number of cooked rice determined in the cooking step, and when ΔT is 5 ° C. or more and less than 10 ° C. Gives a thermal power increased by + 25%, and when ΔT is 10 ° C. or higher and lower than 15 ° C., it gives a thermal power increased by + 35%.

  When ΔT is 15 ° C. or higher, the cooking temperature cannot be detected well and there is a risk of scorching, so heating is stopped, “sensor abnormality” is displayed on the liquid crystal display element 101, and heating is stopped. The heating power value P corrected by ΔT is given in the boiling maintenance step, heated to the cooking temperature, and cooked rice.

  This cooking temperature is assumed to be about 120 ° C., which is 10 ° C. lower than the temperature when the bottom temperature sensor 104 has no foreign matter. When the bottom temperature sensor 104 reaches the cooking temperature, the process proceeds to the steaming step, and after cooking for 15 minutes, the cooking is finished.

  As described above, in the present embodiment, not only is it determined that there is a foreign substance in the pan temperature detection unit 4 by detecting how much the temperature of the pan temperature detection unit 4 after boiling detection is decreased, but also While changing the cooked thermal power according to the value of the lowered temperature, the misalignment width of the detected temperature of the pan temperature detection unit 4 due to foreign matter is finely detected and the number of rice cooked incorrectly determined is strongly corrected By making the cooking temperature lower than normal, it is possible to cook rice with the optimal heating power and cooking temperature necessary to cook deliciously while correcting the deviation of the cooking temperature to prevent burning of the rice .

(Embodiment 3)
FIG. 6 is a block diagram of a rice cooker according to the third embodiment of the present invention.

  As shown in FIG. 6, the pot 1 in which rice and water are put is heated by the heating device 3, and the temperature of the pot 1 is detected by the pot temperature detection unit 4, and the temperature of the water vapor generated from the pot 1 is detected. A detection unit 5 is provided, and the heating unit 3 is driven and controlled by the control unit 8 to perform a rice cooking operation with a predetermined heating power. After the pan temperature detection unit 4 reaches a predetermined temperature, the lid temperature detection unit 5 rises to a predetermined temperature. When the boiling temperature inside the pot 1 is detected by the lid temperature detection unit 5 in the rice cooking number determination step in which the total number of rice cooked is determined according to the time until it is done and the heating power and temperature to be cooked are determined by the total number, the pot temperature detection unit When 4 falls below a predetermined temperature, it is determined that a foreign matter is interposed between the pan temperature detection unit 4 and the pan 1 and the temperature input is not accurately performed, and the cooked thermal power determined in the rice cooking number determination step is determined. Change to change according to the temperature drop Rutotomoni, and configured to perform first raising performs an operation cook to a temperature, cook-up operation at the second temperature dropped then cook up firepower was lower than the temperature during normal raising cooked.

  About the rice cooker comprised as mentioned above, the operation | movement and an effect | action are demonstrated below, referring FIG. FIG. 7 is a sequence diagram of various steps of the rice cooker in the third embodiment of the present invention. First, the bottom heater 103 is heated so that the bottom temperature sensor 104 in the pan 1 is maintained at about 40 ° C. in the water absorption process.

  By maintaining the inside of the pan 1 at about 40 ° C. for 15 minutes, the rice can be gelatinized so that water is absorbed and no core remains in the rice. Next, it moves to a cooking process and heats the pan 1 with the maximum heating power (100% heating power). In this step, the water in the pan 1 is boiled, and the total number of cooked rice in the pan 1 is determined based on the time until the boiling.

  In the cooking process, if the lid temperature sensor 105 in the lid 2 reaches 90 ° C. when the water in the pan 1 boils and becomes steam, the process proceeds to the foreign matter detection step and 60% thermal power is applied. If there is no foreign matter such as rice grains between the bottom temperature sensor 104 and the pan 1, the bottom temperature sensor detects the temperature of the boiling pan even if the bottom heating power is lowered. Draw.

  However, when foreign matter such as rice grains is interposed between the bottom temperature sensor 104 and the pot 1, the bottom temperature sensor 104 is lowered by the ambient temperature around the bottom temperature sensor when the bottom thermal power is lowered. To do. Thereafter, when the bottom temperature sensor 104 starts to rise again, the process proceeds to the boiling maintenance step 1. In this foreign matter detection step, the temperature decrease width of the bottom temperature sensor 104 is measured, and the value is set as ΔT.

  Next, the thermal power P of the boiling maintenance process 1 gives a thermal power increased by + 15% to the total number of cooked rice determined in the cooking process when this ΔT is less than 5 ° C, and ΔT is 5 ° C or more and less than 10 ° C. In this case, the thermal power increased by + 25% is given, and when ΔT is 10 ° C. or higher and lower than 15 ° C., the thermal power increased by + 35% is given.

  When ΔT is 15 ° C. or higher, the cooking temperature cannot be detected well and there is a risk of scorching, so heating is stopped, “sensor abnormality” is displayed on the liquid crystal display element 101, and heating is stopped. The heating power value P corrected by ΔT is given in the boiling maintenance step 1 and heated to the first cooking temperature. The first cooking temperature is 115 ° C., which is 15 ° C. lower than the temperature when the bottom temperature sensor 104 has no foreign matter.

  When the temperature reaches 115 ° C., the process proceeds to the boiling maintenance step 2 where a thermal power value Q, which is a 50% reduction from the thermal power value P, is set and given to the pan 1. When the bottom temperature sensor 104 reaches the second cooking temperature 122 ° C. in the boiling maintenance process 2, the process proceeds to the steaming process, and after cooking for 15 minutes, the cooking is finished.

  As described above, in the present embodiment, not only is it determined that there is a foreign substance in the pan temperature detection unit 4 by detecting how much the temperature of the pan temperature detection unit 4 after boiling detection is decreased, but also While changing the cooked thermal power according to the value of the lowered temperature, the misalignment width of the detected temperature of the pan temperature detection unit 4 due to foreign matter is finely detected and the number of rice cooked incorrectly determined is strongly corrected The cooking operation is performed up to the first temperature, which is lower than the normal temperature, so that the water in the pan is secured to prevent scorching, and then the cooking power is reduced and the cooking operation is performed at the second temperature. It is possible to cook rice deliciously by giving the optimum heating power for gelatinization by sufficiently promoting the gelatinization of rice while preventing burning.

  As described above, the rice cooker according to the present invention corrects the number of cooked rice incorrectly determined even when a foreign object enters between the pan temperature detector and the pan and the detected temperature cannot be detected accurately. Even in the total number of rice cookers, delicious rice can be cooked, which is effective for rice cookers.

DESCRIPTION OF SYMBOLS 1 Pan 2 Lid 3 Heating device 4 Pan temperature detection part 5 Lid temperature detection part 6, 7, 8 Control part

Claims (3)

A pan housed inside the rice cooker body, an openable / closable lid that covers the upper opening of the pan, a heating device that heats the bottom of the pan, and a pan temperature detection unit that detects the temperature of the pan, The rice cooking operation is performed by controlling the heating device from the temperature detected by the lid temperature detection unit that detects the temperature of water vapor generated from the pan in the lid, and the pan temperature detection unit and the lid temperature detection unit. A controller, and the controller determines the number of rice cookers according to the time from when the pan temperature detector reaches a predetermined temperature until the lid temperature detector rises to a predetermined temperature. In the cooking rice total number determining step for determining the heating power and temperature to cook, when the pan temperature detection unit detects boiling in the pan by the lid temperature detection unit, the pan temperature detection A foreign object is interposed between the pan and the pan Rice cooker to change by varying depending determines that the input has not been accurate, the cook-up thermal power determined in cooking if the number determined step to the falling temperature. The control unit determines the number of rice cooking according to the time from when the pan temperature detection unit reaches a predetermined temperature until the lid temperature detection unit rises to the predetermined temperature, and determines the heating power and temperature to be cooked by the total number. In the rice cooking total number determining step to be determined, when the pot temperature detecting unit falls below a predetermined temperature when the lid temperature detecting unit detects boiling inside the pot, the temperature between the pot temperature detecting unit and the pot It is judged that the temperature input is not made correctly due to foreign matter in the rice, and the cooking heat determined in the rice cooking number judgment process is changed according to the temperature drop and changed, and the cooking temperature is lower than normal The rice cooker according to claim 1, wherein the cooking operation is performed at a heated temperature. The control unit determines the number of rice cooking according to the time from when the pan temperature detection unit reaches a predetermined temperature until the lid temperature detection unit rises to the predetermined temperature, and determines the heating power and temperature to be cooked by the total number. In the rice cooking total number determining step to be determined, when the pot temperature detecting unit falls below a predetermined temperature when the lid temperature detecting unit detects boiling inside the pot, the temperature between the pot temperature detecting unit and the pot It is judged that the temperature input is not made correctly due to foreign matter in the rice, and the cooking heat determined in the rice cooking number judgment process is changed according to the temperature drop and changed, and the cooking temperature is lower than normal The rice cooker according to claim 1, wherein the cooking operation is performed to the first temperature, and then the cooking power is reduced and the cooking operation is performed at the second temperature.

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