JP2005087274A - Rice cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable rice cooking even when a condition of one of temperature detecting means is too abnormal to use in a rice cooker of which the heating means to heat a pot is driven by inputting the outputs of a pot temperature detecting means to detect the temperature of the pot and a cover temperature detecting means to detect the temperature of the cover. <P>SOLUTION: The pot 1 which contains rice and water are put is heated by the heating means 2 and the temperature of the pot 1 is detected by the pot temperature detecting means 3. Also, the temperature of steam generated by heating the water in the pot 1 is detected by the cover temperature detecting means 4 and the heating means 2 is driven by a heating control means 5. The output from the cover temperature detecting means 4 during cooking is judged whether within a predetermined temperature range or not by a judgement means 6 and the heating control means 5 is controlled by a control means 7 which inputs the outputs from the pot temperature detecting means 3 and the cover temperature detecting means 4. The control means 7 is constituted to change the heating control method by the output of the judgement means 6. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a rice cooker that inputs the outputs of a pot temperature detecting means for detecting the temperature of a pot and a lid temperature detecting means for detecting the temperature of the lid and drives a heating means for heating the pot.

  Conventionally, this type of rice cooker has been configured as shown in FIG. Hereinafter, the configuration will be described.

  As shown in FIG. 12, the pan 30 is detachably housed in the rice cooker main body 32, and the pan 30 is heated by the heating means 31 to perform rice cooking and heat insulation. The pan temperature detecting means 33 detects the temperature of the pan 30. A lid 34 is provided on the upper portion of the rice cooker main body 32 so as to be openable and closable. A lid temperature detecting means 35 for detecting the temperature of the lid 34 is provided in the lid 34.

  The output of the pan temperature detection means 33 and the output of the lid temperature detection means 35 are input to the control means 43. The control means 43 simultaneously includes a timer 36, a first storage means 37, a second storage means 38, and a cooking process storage. It inputs from the means 40 etc., controls the energization amount of the heating means 31 via the heating control means 39, and is comprised so that the temperature of the pan 30 may be controlled to an appropriate temperature at the time of rice cooking and heat retention. In addition, 41 is a start switch and 42 is an abnormality notification means.

In the above configuration, when the temperature detected by the pan temperature detecting means 33 is lower than T1 but the temperature detected by the lid temperature detecting means 35 is higher than T0 before the time counted by the timer 36 or t0, the control means 43 Controls the heating control means 39 to stop the heating, and the abnormality notifying means 42 notifies the abnormality, so that the pan 30 can be prevented from rising abnormally and the user is abnormal. Since it recognizes, it can prevent using repeatedly in a dangerous state (for example, refer patent document 1).
JP-A-5-337037

  However, in such a conventional configuration, when an abnormality occurs in one temperature detection means such as the pan temperature detection means 33 or the lid temperature detection means 35, rice cooking is stopped and the cooked rice is wasted. Had a problem.

  The present invention solves the above-described conventional problems, and an object thereof is to enable rice to be cooked even when one temperature detection unit cannot be used in an abnormal state.

  In order to achieve the above object, the present invention heats a pan containing rice and water by heating means, detects the temperature of the pan by the pan temperature detecting means, and the temperature of the steam generated by heating the water inside the pan. Is detected by the lid temperature detection means, the heating means is driven by the heating control means, and it is determined by the determination means whether the output from the lid temperature detection means at the time of cooking is within a predetermined temperature range. The heating control unit is configured to be controlled by the control unit that inputs the output of the lid temperature detection unit, and the control unit is configured to switch the heating control method according to the output of the determination unit.

  Thereby, since the determination means can determine whether the output from the lid temperature detection means is within a predetermined temperature range, one temperature detection is performed by detecting an abnormality of the cover temperature detection means and switching the heating control method to cook rice. Even when the means cannot be used in an abnormal state, rice can be cooked.

  In the present invention, since the determination means can determine whether the output from the lid temperature detection means is within a predetermined temperature range, the lid temperature detection is detected by detecting the abnormality of the lid temperature detection means and switching the heating control method to cook rice. Even if the means cannot be used, rice can be cooked, and even when one temperature detection means cannot be used in an abnormal state, rice can be cooked.

  1st invention is the temperature of the vapor | steam which generate | occur | produces when the pot which puts rice and water, the heating means which heats the said pot, the pot temperature detection means which detects the temperature of the said pot, and the water inside the said pot is heated. Lid temperature detection means for detecting the heating means, heating control means for driving the heating means, determination means for determining whether the output from the lid temperature detection means during cooking is within a predetermined temperature range, and the pot temperature A detection means and a control means for inputting the output of the lid temperature detection means and controlling the heating control means, wherein the control means is configured to switch the heating control method according to the output of the determination means. Since the means can determine whether the output from the lid temperature detecting means is within a predetermined temperature range, the lid temperature detecting means cannot be used by detecting the abnormality of the lid temperature detecting means and switching the heating control method to cook rice. Even cook rice Bets can be, even if one of the temperature detection means can not be used in an abnormal state, it is possible to be able to cook the rice.

  2nd invention is provided with the lid heating means which heats the inner lid part arrange | positioned at the pan upper part in the said 1st invention, and the determination means controls the said lid heating means, and after heating for a predetermined time, lid temperature Whether or not the output from the detection means is within a predetermined temperature range, and the change from the detection temperature of the lid temperature detection means causes the determination means to output the output from the lid temperature detection means within the predetermined temperature range. Therefore, it is possible to cook rice even if the lid temperature detecting means cannot be used by detecting the abnormality of the lid temperature detecting means and switching the heating control method to cook rice.

  According to a third aspect of the present invention, in the first or second aspect of the invention, when the control means determines that the temperature is not within the predetermined temperature range by the determination means, the predetermined temperature is detected when the pot temperature detection means detects boiling in the pot. Heating is controlled until the cooking temperature is reached and the cooking temperature is reached. Boiling temperature detection means detects boiling in the pan, and the cooking temperature is controlled until the cooking temperature is reached by dropping to the prescribed heating amount. By doing so, rice can be cooked even if the lid temperature detecting means is not available.

  4th invention is the said 1st or 2nd invention, When a control means determines with it not being in a predetermined temperature range with a determination means, it is so that time until boiling in a pot by a pot temperature detection means is so short. The amount of heating is reduced and the heating is controlled until the cooking temperature is reached. The boiling temperature detection means detects boiling in the pan, and the shorter the time to boiling, the lower the heating amount and the cooking temperature. By heating and cooking until reaching the level, rice can be cooked even if the lid temperature detecting means cannot be used.

  According to a fifth aspect of the present invention, in the first or second aspect of the present invention, a room temperature detection unit that detects a room temperature is provided, and the control unit replaces the lid temperature detection unit when the determination unit determines that the temperature is not within the predetermined temperature range. In addition, the boiling in the pan is detected by the room temperature detection means, and the heating amount is decreased as the time until boiling is shorter, and the heating is controlled until the cooking temperature is reached. The rice is cooked even if the lid temperature detection means cannot be used by indirectly detecting the boiling of the rice and reducing the amount of heating as the time until this boiling is shorter, and controlling the cooking until the cooking temperature is reached. Can do.

  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)
As shown in FIG. 1 and FIG. 2, the pot 1 contains rice and water, and the pot 1 is heated from the bottom by the heating means 2. The pan temperature detecting means 3 contacts the bottom surface of the pan 1 and detects the temperature of the pan 1. The lid 22 has an air layer inside, and is provided so as to be openable and closable above the pan 1. The lid heating means 9 is disposed so as to heat the inner lid portion of the lid 22 at the top of the pan 1. A lid temperature detecting means 4 for detecting the temperature is provided to detect the temperature of the steam generated when the water in the pot 1 is heated. The room temperature detection means 15 is configured to detect the room temperature by detecting the temperature of the space in the lid 22. The control circuit 23 has a built-in microcomputer.

  The heating control means 5 drives the heating means 2. The judging means 6 judges whether the output from the lid temperature detecting means 4 at the time of cooking is within a predetermined temperature range. The control means 7 is configured to input the outputs of the pan temperature detection means 3 and the lid temperature detection means 4 to control the heating control means 5, drive the heating means 2, and switch the heating control method according to the output of the determination means 6. doing.

  The operation of the above configuration will be described with reference to FIG. After the rice cooking is started, the data of the lid temperature detecting means 4 is input in step 60, and it is determined whether the input range is in the range of -20 ° C to + 115 ° C. If it exists in the range, it will progress to step 61 and will use the pot temperature detection means 3 and the lid temperature detection means 4, and will transfer to the normal rice cooking mode which performs a normal rice cooking process. If it is not within the range, the process proceeds to step 62, shifts to the one-sensor mode in which rice is cooked without using the lid temperature detection means 4, and shifts to step 63 if the rice cooking is completed.

  From these steps, it is determined whether the lid temperature detecting means 4 is operating normally at the start of cooking rice. Therefore, even when the lid temperature detecting means 4 is not operating normally due to condensation, contamination, damage, etc., other temperature detection is possible. By using the means, rice can be executed and cooked.

  As described above, in the present embodiment, since the determination unit 6 can determine whether the output from the lid temperature detection unit 4 is within a predetermined temperature range, an abnormality of the lid temperature detection unit 4 is detected and the heating control method is performed. Can be cooked even if the lid temperature detecting means 4 cannot be used.

(Embodiment 2)
As shown in FIG. 4, the determination means 8 controls the lid heating means 9 that heats the inner lid portion arranged on the upper part of the pan 1, and after heating for a predetermined time, the output from the lid temperature detection means 4 is It is determined whether the temperature is within a predetermined temperature range. The control means 7 is configured to input the outputs of the pan temperature detection means 3 and the lid temperature detection means 4 to control the heating control means 5 and the lid heating means 9, and to switch the heating control method according to the output of the determination means 8. Yes. Other configurations are the same as those of the first embodiment, and the same reference numerals are given and description thereof is omitted.

  The operation of the above configuration will be described with reference to FIG. After starting rice cooking, the lid heating means (heater) 9 is heated in step 70, and steps 70 to 71 are repeated until 30 seconds elapse in step 71. If 30 seconds have elapsed in step 71, data of the lid temperature detecting means 4 is input in step 72, and it is determined whether the input range is in the range of -20 ° C to + 115 ° C.

  If it exists in the range, it will progress to step 73 and will use the pan temperature detection means 3 and the lid temperature detection means 4, and will transfer to the normal rice cooking mode which performs a normal rice cooking process. If it is not within the range, the process proceeds to step 74, shifts to a one-sensor mode in which rice is cooked without using the lid temperature detection means 4, and shifts to step 75 if the rice cooking is completed.

  From these steps, the lid heating means 4 is heated for a predetermined time at the start of rice cooking, and the lid heating means 9 and the lid temperature detection means 4 are inspected to determine whether the lid temperature detection means 4 is operating normally. Even when the lid temperature detection means 4 is not operating normally due to condensation, contamination, breakage, poor installation, etc., it can be cooked by using other temperature detection means.

  As described above, in the present embodiment, the determination unit 8 can accurately determine whether the output from the lid temperature detection unit 4 is within a predetermined temperature range by the change in the detection temperature of the lid temperature detection unit 4. By detecting the abnormality of the lid temperature detecting means 4 and switching the heating control method to cook rice, rice can be cooked even if the lid temperature detecting means 4 cannot be used.

(Embodiment 3)
As shown in FIG. 6, when the control means 10 determines that the temperature is not within the predetermined temperature range by the determination means 8, the control means 10 drops to a predetermined heating amount when the pot temperature detection means 3 detects boiling in the pot 1, It is configured to control heating until the cooking temperature is reached. Other configurations are the same as those in the first or second embodiment, and the same reference numerals are given and description thereof is omitted.

  The operation of the above configuration will be described with reference to FIG. After starting rice cooking, the lid heating means (heater) 9 is heated in step 70, and steps 70 to 71 are repeated until 30 seconds elapse in step 71. If 30 seconds have elapsed in step 71, the data of the lid temperature detecting means 4 is input in step 72, and it is determined whether the input range is in the range of -20 ° C to + 115 ° C. If it exists in the range, it will progress to step 73 and will use the pan temperature detection means 3 and the lid temperature detection means 4, and will transfer to the normal rice cooking mode which performs a normal rice cooking process.

  If it is not within the range, the process proceeds to step 80, where the pan temperature detecting means 3 becomes 93 ° C. or higher, and heating is performed by the heating means (heater) 2 in step 81 until boiling in the pot 1 is detected. If boiling is detected at step 80, the routine proceeds to step 83, where the heating amount of the heating means 2 is reduced by 40%. In step 84, the amount of water in the pan 1 is exhausted, and the heating amount is maintained until the pan temperature detecting means 3 rises to the rice cooking end temperature 130 ° C. To do.

  From these steps, the lid heating means 9 is heated for a predetermined time at the start of rice cooking, and the state of the lid heating means 9 and the lid temperature detection means 4 is inspected to determine whether the lid temperature detection means 4 is operating normally. Even when the lid temperature detecting means 4 is not operating normally due to condensation, contamination, breakage, poor installation, etc., it is possible to cook and cook rice by using the pan temperature detecting means 3.

  As described above, in the present embodiment, the pot temperature detection means 3 detects boiling in the pot 1, drops it to a predetermined heating amount, controls the heating until reaching the cooking temperature, and cooks the lid temperature. Even if the means 4 cannot be used, rice can be cooked.

(Embodiment 4)
As shown in FIG. 8, when the control means 12 determines that the temperature is not within the predetermined temperature range by the determination means 8, the heating amount is decreased as the time until the pot 1 is boiled by the pot temperature detection means 3 is shortened. It is configured to control heating until the cooking temperature is reached. Other configurations are the same as those in the first or second embodiment, and the same reference numerals are given and description thereof is omitted.

  The operation of the above configuration will be described with reference to FIG. After starting rice cooking, the lid heating means (heater) 9 is heated in step 70, and steps 70 to 71 are repeated until 30 seconds elapse in step 71. If 30 seconds have elapsed in step 71, data of the lid temperature detecting means 4 is input in step 72, and it is determined whether the input range is in the range of -20 ° C to + 115 ° C. If it exists in the range, it will progress to step 73 and will use the pan temperature detection means 3 and the lid temperature detection means 4, and will transfer to the normal rice cooking mode which performs a normal rice cooking process.

  If it is not within the range, the process proceeds to step 90, where the pan temperature detecting means 3 reaches 93 ° C. or higher, and heating is performed by the heating means (heater) 2 in step 91 until boiling is detected in the pot 1, and boiling occurs in step 92. Measure the time until. If boiling is detected in step 90, the process proceeds to step 93. When the boiling time is 20 minutes or more, the heating amount of the heating means 2 is 100%, and when the boiling time is 16 minutes or more, the heating amount is reduced by 30%. Let If the boiling time is 9 minutes or less, it is reduced by 45%. In step 94, the amount of water in the pan 1 is exhausted, and the amount of heating is maintained until the pan temperature detecting means 3 rises to the rice cooking end temperature 130 ° C. To do.

  From these steps, the lid heating means 9 is heated for a predetermined time at the start of rice cooking, and the state of the lid heating means 9 and the lid temperature detection means 4 is inspected to determine whether the lid temperature detection means 4 is operating normally. Even if the lid temperature detection means 4 is not operating normally due to condensation, pollution, damage, poor installation, etc., the pot temperature detection means 3 is used to detect boiling and to measure the boiling time. A heating amount corresponding to the amount can be given, and rice can be cooked by cooking.

  As described above, in the present embodiment, the pot temperature detecting means 3 detects boiling in the pot 1, the heating amount is reduced as the time until the boiling is shorter, and the heating control is performed until the cooking temperature is reached. By doing so, rice can be cooked even if the lid temperature detection means 4 cannot be used.

(Embodiment 5)
As shown in FIG. 10, when the determination unit 8 determines that the temperature is not within the predetermined temperature range, the control unit 14 detects boiling in the pan 1 by the room temperature detection unit 15 instead of the lid temperature detection unit 4. The shorter the time until boiling, the lower the amount of heating and the heating control until the cooking temperature is reached. Here, as shown in FIG. 2, the room temperature detection means 15 is disposed in a position in the rice cooker where it can sense the heat of the lid portion due to water vapor, and detects the temperature of the space in the lid 22, thereby detecting the room temperature. Is configured to detect. Other configurations are the same as those in the first or second embodiment, and the same reference numerals are given and description thereof is omitted.

  The operation of the above configuration will be described with reference to FIG. After starting rice cooking, the lid heating means (heater) 9 is heated in step 70, and steps 70 to 71 are repeated until 30 seconds elapse in step 71. If 30 seconds have elapsed in step 71, data of the lid temperature detecting means 4 is input in step 72, and it is determined whether the input range is in the range of -20 ° C to + 115 ° C. If it exists in the range, it will progress to step 73 and will use the pan temperature detection means 3 and the lid temperature detection means 4, and will transfer to the normal rice cooking mode which performs a normal rice cooking process.

  If it is not within the range, the process proceeds to step 100, and the boiling detection is detected by the room temperature detection means 15. Since the room temperature detecting means 15 is set at a position where the temperature of the water vapor can be easily taken (in the vicinity of the steam cylinder, etc.), the temperature of the water vapor can be detected when boiling, and the room temperature can be detected otherwise. Next, in step 101, the temperature of the pan temperature detecting means 3 becomes 93 ° C. or higher, and heating is performed by the heating means (heater) 2 in step 102 until boiling in the pan 1 is detected. measure.

  If boiling is detected in step 101, the process proceeds to step 104. If the boiling time is 20 minutes or more, the heating amount of the heating means 2 is 100%, and if the boiling time is 17 minutes or more, the heating amount is reduced by 30%. Let If the boiling time is 9 minutes or less, it is reduced by 45%. In step 105, the amount of water in the pan 1 is exhausted, and the heating amount is maintained until the pan temperature detecting means 3 rises to the rice cooking end temperature 130 ° C. To do.

  From these steps, the lid heating means 9 is heated for a predetermined time at the start of rice cooking, and the state of the lid heating means 9 and the lid temperature detection means 4 is inspected to determine whether the lid temperature detection means 4 is operating normally. Even if the lid temperature detection means 4 is not operating normally due to condensation, pollution, damage, poor installation, etc., the boiling temperature is detected by using the room temperature detection means 15 and the boiling time is measured by measuring the boiling time. The amount of heating according to can be given, and rice can be cooked and cooked.

  As described above, in the present embodiment, boiling in the pan 1 is indirectly detected by the room temperature detecting means 15, and the heating amount is reduced as the time until the boiling is shorter, and the heating control is performed until the cooking temperature is reached. By cooking rice, rice can be cooked even if the lid temperature detection means 4 cannot be used.

  As described above, the rice cooker according to the present invention can cook rice even if the lid temperature detecting means cannot be used by detecting the abnormality of the lid temperature detecting means and switching the heating control method to cook rice. It is useful as a rice cooker that drives the heating means for heating the pot by inputting the outputs of the pot temperature detecting means for detecting the temperature of the pot and the lid temperature detecting means for detecting the temperature of the lid.

The block diagram of the rice cooker in the 1st Embodiment of this invention. Cross section of the rice cooker Main part operation flowchart of the rice cooker The block diagram of the rice cooker in the 2nd Embodiment of this invention. Main part operation flowchart of the rice cooker The block diagram of the rice cooker in the 3rd Embodiment of this invention. Main part operation flowchart of the rice cooker The block diagram of the rice cooker in the 4th Embodiment of this invention. Main part operation flowchart of the rice cooker The block diagram of the rice cooker in the 5th Embodiment of this invention. Main part operation flowchart of the rice cooker System diagram of conventional rice cooker

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pan 2 Heating means 3 Pan temperature detection means 4 Lid temperature detection means 5 Heating control means 6 Judgment means 7 Control means

Claims (5)

A pot for putting rice and water, a heating means for heating the pot, a pot temperature detecting means for detecting the temperature of the pot, and a lid temperature detection for detecting the temperature of steam generated by heating the water in the pot Means, heating control means for driving the heating means, determination means for determining whether the output from the lid temperature detection means during cooking is within a predetermined temperature range, the pan temperature detection means, and the lid temperature And a control means for controlling the heating control means by inputting the output of the detection means, wherein the control means is configured to switch the heating control method according to the output of the determination means. A lid heating means for heating the inner lid portion arranged in the upper part of the pan is provided, and the determination means controls the lid heating means and heats it for a predetermined time, and then the output from the lid temperature detection means is within a predetermined temperature range. The rice cooker according to claim 1, which is determined. When it is determined by the determining means that the temperature is not within the predetermined temperature range, the control means drops the heat to a predetermined amount when the pot temperature detecting means detects boiling in the pot, and controls the heating until the cooking temperature is reached. The cooker according to claim 1 or 2. When the control means determines that the temperature is not within the predetermined temperature range by the determination means, the heating amount is reduced as the time until boiling in the pan is shortened by the pan temperature detection means, and the heating control is performed until the cooking temperature is reached. The cooker according to claim 1 or 2. A room temperature detecting means for detecting the room temperature is provided, and the control means detects boiling in the pan by the room temperature detecting means instead of the lid temperature detecting means when the determining means determines that the temperature is not within the predetermined temperature range. The rice cooker according to claim 1 or 2, wherein the shorter the time to do, the lower the amount of heating and the heating control until reaching the cooking temperature.

Images