JP2795201B2 - Rice cooker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice cooker,
More specifically, the present invention relates to heat retention control of a rice cooker.

[0002]

2. Description of the Related Art In addition to a rice cooking function, a rice cooker has a heat retaining function for keeping rice warm after the completion of rice cooking, and a reheating function for reheating rice to maintain a predetermined temperature during the heat retention. (Eg, Japanese Patent Application No.
-276584).

[0003] On the other hand, with respect to the heat retention function, conventionally, the heat retention temperature is generally set uniformly at a relatively high temperature of, for example, about 72 ° C. Gradually, the rice deteriorates due to the heat and becomes harder, and cannot be eaten deliciously.

[0004] As a method of compensating for such a drawback of the high-temperature insulation, there is a low-temperature insulation in which the insulation temperature is maintained at a low temperature of about 60 ° C. According to this low-temperature heat retention, even if the heat retention is continued for a long time, the quality of the rice is less deteriorated than in the case of the high-temperature heat retention, so that the rice can be eaten deliciously.

[0005] However, when only such low-temperature heat retention is used, alteration due to heat retention is suppressed, but a new problem of early rot occurs. For this reason, recently, it is provided with a first heat retention mode in which only conventional high temperature heat retention is performed, and a second heat retention mode in which low-temperature heat retention and high-temperature heat retention are selectively combined, and within a short time after cooking rice. In the case where the heat retention time at the end of eating is relatively short, the heat retention in the first heat retention mode is performed. Attempts have been made to maintain the temperature in an embodiment. In the heat retention in the second heat retention mode, for example, hot rice is allowed to be eaten as a high temperature keep in a time period corresponding to a meal time, and rice is kept as a low temperature heat keep in a time period outside the meal time. It suppresses deterioration due to heat, so that rice can be eaten for a longer time.

[0006]

However, in such a rice cooker in which the high-temperature insulation and the low-temperature insulation are selectively used in accordance with a user's request, there is a problem in relation to a reheating step or actual use by a user. -There are the following problems related to operations.

First, the reheating time becomes a problem in relation to the reheating step. That is, if the reheating time is fixed to a fixed time as in the past, a difference occurs between the reheating during the high-temperature keeping and the reheating during the low-temperature keeping, the temperature of the rice at the end of the reheating, For example, when the reheating time is set in accordance with the high temperature keeping, the temperature at the end of the reheating may be so low that the rice cannot be eaten deliciously in the reheating with the low temperature keeping.

[0008] Second, in connection with the use of a rice cooker, display of the heat retention time and warning to the user are problematic. In other words, rice is gradually discolored as the warming time becomes longer and the taste is impaired, so the warming time is displayed,
It is also necessary to warn the user to eat while the heat insulation time is as short as possible. In this case, in particular, the first heat insulation mode of only high-temperature heat insulation and the second heat insulation mode including high-temperature heat insulation and low-temperature insulation In the rice cooker that also has the same heat retention time as the first heat retention mode,
In the case of the heat retention mode, the progress of rice deterioration is slower,
If the heat retention time as a reference for issuing a warning is fixed to a fixed time, for example, in the case of heat retention in the second heat retention mode, a warning is issued to the extent that the warning has not yet been issued even though the rice has not been altered. In some cases, it does not correspond to the deteriorated state of rice.

Although it is not directly related to the mode of keeping heat, there is also a problem of how to give a warning when the above-mentioned warning is issued.

Third, in connection with the operability when the user actually uses the rice cooker, there is a problem in that the operation involved in setting the mode of heat insulation and the like is complicated. That is, the user only has to operate the heat retention switch in the case where only the high-temperature heat retention is performed as in the related art. However, when the first heat retention mode and the second heat retention mode can be selected, the user can operate the heat retention switch. It is necessary to perform an operation of selecting the mode, and the operation becomes complicated accordingly. In some cases, there is a concern that a heat-preserving mode different from a desired mode may be set due to an erroneous operation.

[0011] In view of the above, the present invention has an object to provide a rice cooker capable of selecting a high-temperature insulation and a low-temperature insulation, to maintain good insulation of rice, to provide an appropriate long-term insulation warning, and to improve operability. It was done.

[0012]

Means for Solving the Problems In the present invention, the following configuration is adopted as specific means for solving such problems.

[0013] In the first invention of the present application, an inner pot for storing rice and water, heating rice cooking means for heating the inner pot to cook rice,
In a rice cooker provided with a heat retaining means for keeping the cooked rice warm and a reheating means for reheating the rice while keeping the heat, the heat retaining means has two heat retaining steps of a high temperature keeping step and a low temperature keeping step, When the heat-retention step is the low-temperature heat-retention step, the low-temperature heat-retention memory that stores the low-temperature heat-retention step and the reheating time by the reheating unit are set to be longer when the low-temperature heat-retention memory is set than when it is not set. And a reheating time setting means for setting the reheating time.

[0014] In the second invention of the present application, an inner pot for storing rice and water, heating rice cooking means for heating the inner pot to cook rice,
In a rice cooker provided with a heat retaining means for keeping the cooked rice warm and a reheating means for reheating the rice while keeping the heat, the heat retaining means has two heat retaining steps of a high temperature keeping step and a low temperature keeping step, Temperature detecting means for detecting the temperature of the rice being kept warm; low-temperature keeping memory for storing when the temperature of the rice at the start of reheating is a temperature corresponding to the low-temperature keeping step; A reheating time setting means for setting the heating time longer when the low-temperature memory is set than when it is not set is provided.

[0015] In the third invention of the present application, an inner pot for storing rice and water, heating rice cooking means for heating the inner pot to cook rice,
In a rice cooker provided with a heat retaining means for keeping cooked rice warm, and a reheating means for reheating the rice during the heat keeping, the heat retaining means comprises a first heat retaining mode having only a high temperature heat retaining step and a high temperature heat retaining step. And a second heat retention mode having two heat retention steps of a low-temperature heat retention step, and whether the heat retention mode is the first heat retention mode or the second heat retention mode in the heat retention step. And a heat retention mode setting means for setting the heat retention mode after reheating to the heat retention mode before reheating based on the contents of the heat retention mode memory at the end of reheating by the reheating means. It is characterized by that.

[0016] In the fourth invention of the present application, an inner pot for storing rice and water, heating rice cooking means for heating the inner pot to cook rice,
In a rice cooker provided with a heat retaining means for keeping cooked rice in a rice cooker, the heat retaining means comprises a second heat retaining step of a first heat retaining mode having only a high temperature retaining step and a heat retaining step of a high temperature retaining step and a low temperature retaining step. And a heat retention mode memory for storing whether the heat retention mode is the first heat retention mode or the second heat retention mode in the heat retention step, Based on the contents of the heat retention mode memory, when the heat retention mode before the current rice cooking is the first heat retention mode, the current heat retention mode is the first heat retention mode, and when the second heat retention mode is the second heat retention mode, the current heat retention mode is the current heat retention mode. And a heat retention mode setting means for setting the heat retention mode to the second heat retention mode.

[0017] In the fifth invention of the present application, an inner pot for storing rice and water, heating rice cooking means for heating the inner pot to cook rice,
In a rice cooker provided with a heat retaining means for keeping cooked rice in a rice cooker, the heat retaining means comprises a second heat retaining step of a first heat retaining mode having only a high temperature retaining step and a heat retaining step of a high temperature retaining step and a low temperature retaining step. And a heat retention mode memory for storing whether the heat retention mode is the first heat retention mode or the second heat retention mode in the heat retention step, and starting the selection of the heat retention mode. Sometimes, based on the contents of the heat retention mode memory, when the previous heat retention mode was the first heat retention mode, the current heat retention mode was set to the first heat retention mode, and when the previous heat retention mode was the second heat retention mode, the current heat retention mode was set to the current heat retention mode. And a heat retention mode setting means for setting the heat retention mode to the second heat retention mode.

According to a sixth aspect of the present invention, there is provided an inner pot for storing rice and water, and a rice heating means for heating the inner pot to cook rice.
In a rice cooker provided with a heat retaining means for keeping cooked rice in a rice cooker, the heat retaining means comprises a second heat retaining step of a first heat retaining mode having only a high temperature retaining step and a heat retaining step of a high temperature retaining step and a low temperature retaining step. The heat retention mode is configured to be selectable, and a heat retention display means for lighting and displaying that the heat retention means is keeping heat, and a heat retention time integrating means for integrating the elapsed time during the heat retention by the heat retention means, Warning means for blinking the heat retention display means when the heat retention elapsed time exceeds the warning reference time; and setting the warning reference time as an operation reference of the warning means in the second heat retention mode in the first heat retention mode. And a warning reference time setting means for setting a longer reference time.

According to a seventh aspect of the present invention, there is provided an inner pot for storing rice and water, and a rice heating means for heating the inner pot to cook rice.
In a rice cooker provided with a heat retaining means for keeping cooked rice in a rice cooker, the heat retaining means comprises a second heat retaining step of a first heat retaining mode having only a high temperature retaining step and a heat retaining step of a high temperature retaining step and a low temperature retaining step. And a heat retention time integrating means for integrating the elapsed time during the heat retention by the heat retention means, a current time display means for lighting and displaying a current time during the heat retention, and a heat retention elapsed time. Warning means for blinking the current time display means when the time exceeds the warning reference time, and the warning reference time, which is the operation reference of the warning means, is set in the second heat retention mode more than in the first heat retention mode. And a warning reference time setting means for setting a longer time.

According to an eighth aspect of the present invention, there is provided an inner pot for storing rice and water, and a rice heating means for heating the inner pot to cook rice.
In a rice cooker provided with a heat retaining means for keeping cooked rice in a rice cooker, the heat retaining means comprises a second heat retaining step of a first heat retaining mode having only a high temperature retaining step and a heat retaining step of a high temperature retaining step and a low temperature retaining step. And a heat retention time accumulation means for accumulating the elapsed time during the heat retention by the heat retention means, a current time display means for lighting and displaying a current time during the heat retention, and Display switching means for turning on and displaying the heat retention time on the current time display means instead of the current time only during the switch operation when the switch operation is performed; and the switch when the heat retention time exceeds the warning reference time. A warning means for causing the current time display means to display a display irrelevant to the current time and the heat retention elapsed time only when the switch is operated, and The a reference operation warning means the warning reference time is characterized by the time the second heat insulating manner with a warning reference time setting means for setting a longer than during the first insulation aspect.

According to a ninth aspect of the present invention, there is provided an inner pot for storing rice and water, and a rice heating means for heating the inner pot to cook rice.
In a rice cooker provided with a heat retaining means for keeping cooked rice in a rice cooker, the heat retaining means comprises a second heat retaining step of a first heat retaining mode having only a high temperature retaining step and a heat retaining step of a high temperature retaining step and a low temperature retaining step. And the two heat retention modes in the heat retention means are switched by operating a single heat retention switch provided with two display means corresponding to the two heat retention aspects. It is characterized by alternately selecting each time and starting the heat retention in the heat retention mode.

[0022]

Operation and effect of the present invention In the present invention, the following operation and effect
The effect is obtained.

(A) According to the rice cooker according to the first aspect of the present invention, based on the contents of the low-temperature heat storage memory stored in correspondence with the execution of low-temperature heat retention, in the case of reheating during low-temperature heat retention, The reheating time is made longer than in the case of reheating during high-temperature keeping. Therefore, the temperature of rice at the start of reheating is
The case where reheating is performed during low-temperature insulation is lower than the case where reheating is performed during high-temperature insulation, but the temperature difference at the start of reheating is such that the reheating time during low-temperature insulation is reduced during high-temperature insulation. By setting it longer than the reheating time in, the difference in the amount of heat supplied between the two is reduced as much as possible, and at the end of the reheating, there is almost no difference in the rice temperature between the two, and the user can keep warm Irrespective of the difference, the user can eat rice at an appropriate temperature.

(B) According to the rice cooker according to the second aspect of the present invention, the case of reheating during low-temperature keeping based on the contents of the low-temperature keeping memory stored based on the temperature of rice at the start of reheating. In this case, the reheating time is made longer than in the case of reheating during high-temperature keeping. Therefore, in the case of the rice cooker according to the second invention, as in the case of the rice cooker according to the first invention, the temperature difference at the start of reheating based on the difference between the low-temperature heat retention and the high-temperature heat retention. Is reduced as much as possible by adjusting the reheating time, and at the end of the reheating, there is almost no difference between the two rice temperatures, so that the user can eat rice at an appropriate temperature regardless of the difference in the heat retention mode. It is.

(C) According to the rice cooker according to the third aspect of the present invention, the heat retaining means has a first heat retaining mode having only a high temperature retaining step and two thermal retaining steps of a high temperature retaining step and a low temperature retaining step. In a configuration in which the second heat retention mode can be selected, when the reheating by the reheating means ends, the heat retention mode after reheating based on the heat retention mode stored in the heat retention mode memory is changed by the user's selection frequency. Is automatically set to the heat retention mode before reheating which seems to be high. Therefore,
As long as the user has the same intention to select the heat retention mode as before, it is not necessary to set the heat retention mode every time reheating is performed, and the operation in use becomes simpler and the operability is improved. is there.

(D) According to the rice cooker according to the fourth aspect of the present invention, the heat retaining means has a first heat retaining mode having only a high temperature thermal retaining step and two thermal retaining steps of a high temperature thermal retaining step and a low temperature thermal retaining step. In a configuration in which the second heat retention mode can be selected, the heat retention mode is automatically set to the previous heat retention mode stored in the heat retention mode memory that is considered to be frequently selected by the user at the end of rice cooking. You. Therefore, as long as the user has the same intention to select the heat retention mode as before, it is not necessary to set the heat retention mode every time rice is cooked, and the operation in use becomes simpler and the operability is improved. .

(E) According to the rice cooker according to the fifth aspect of the present invention, the heat retaining means has a first heat retaining mode having only a high temperature thermal retaining step, and two thermal retaining steps of a high temperature thermal retaining step and a low temperature thermal retaining step. In the configuration configured to be able to select the second heat retention mode, the current heat retention mode at the start of the heat retention mode selection is the same as the previous heat retention mode stored in the heat retention mode memory that is considered to be frequently selected by the user. Set automatically. Therefore, as long as the user has the same intention to select the heat retention mode as before, it is not necessary to set the heat retention mode each time the selection of the heat retention mode is started, which simplifies the operation in use and improves operability. Is what you do.

(F) According to the rice cooker according to the sixth aspect of the present invention, when the elapsed heat retention time accumulated during the heat retention exceeds the warning reference time, the warning display means blinks the heat retention display means. Therefore, the user recognizes that deterioration of rice is progressing due to long-time heat retention, for example, by visually checking the blinking of the heat retention display means regardless of the presence or absence of the current time display means for displaying the current time. be able to.

Further, in this case, the warning reference time, which is the operation reference of the warning means, is set longer in the second heat retention mode than in the first heat retention mode.
In the second warming mode, in which the deterioration of rice by heat retention is slow, the heat retention is displayed for a longer time later than in the first warming mode, in which the deterioration of rice by heat retention is early, and the heat is displayed for a long time regardless of the difference in the warming mode. There is almost no difference in the degree of progress of the deterioration of the rice at the time when the warming warning is issued, and the reliability of the warning by the warning means is improved.

As a synergistic effect, the convenience in using the rice cooker is improved.

(G) According to the rice cooker according to the seventh aspect of the present invention, even if the current time display means displays the current time during the heat retention, the elapsed time of the heat retention accumulated during the heat retention is the warning reference time. When the time exceeds, the current time means is caused to blink by the warning means, so that the user can confirm the current time by the current time display means during the heat retention, and when the current time display means blinks, the user can confirm the current time. By visually observing, it is possible to recognize that deterioration of rice is progressing due to long-time heat retention.

Further, in this case, the warning reference time, which is the operation reference of the warning means, is set longer in the second heat retention mode than in the first heat retention mode.
In the second warming mode, in which the deterioration of rice by heat retention is slow, the heat retention is displayed for a longer time later than in the first warming mode, in which the deterioration of rice by heat retention is early, and the heat is displayed for a long time regardless of the difference in the warming mode. There is almost no difference in the degree of progress of the deterioration of the rice at the time when the warming warning is issued, and the reliability of the warning by the warning means is improved.

As a synergistic effect, the convenience in using the rice cooker is improved.

(H) According to the rice cooker according to the eighth aspect of the present invention, the current time is displayed by the current time display means during the heat retention, so that the user can know the current time by confirming the current time. On the other hand, for example, when the time setting switch is operated, the elapsed time of the heat retention is switched and displayed on the current time display means only during the operation, so that the user can easily know the elapsed time of the heat retention and further perform the switch operation. If the elapsed time of the heat retention has already exceeded the warning reference time at that time, the warning means displays on the current time display means irrespective of the current time and the elapsed time of the heat retention only during the switch operation. By visually recognizing this, it is possible to recognize that deterioration of rice is progressing due to long-time heat retention. In other words, the user can know both the current time, the warming elapsed time, and the long-time warming warning by switching the display of the current time display means by a switch operation.

Further, in this case, the warning reference time, which is the operation reference of the warning means, is set longer in the second heat retention mode than in the first heat retention mode.
In the second warming mode, in which the deterioration of rice by heat retention is slow, the heat retention is displayed for a longer time later than in the first warming mode, in which the deterioration of rice by heat retention is early, and the heat is displayed for a long time regardless of the difference in the warming mode. There is almost no difference in the degree of progress of the deterioration of the rice at the time when the warming warning is issued, and the reliability of the warning by the warning means is improved.

As a synergistic effect, the convenience in using the rice cooker is improved.

(I) According to the rice cooker according to the ninth aspect of the present invention, the heat retaining means has a first heat retaining mode having only a high temperature thermal retaining step, and two thermal retaining steps of a high temperature thermal retaining step and a low temperature thermal retaining step. In a configuration in which the second heat retention mode can be selected, by operating a single heat retention switch provided with two display means corresponding to these two heat retention modes, the first heat retention switch is operated every time the switch is operated. And the second heat retention mode are alternately selected, and the heat retention in the heat retention mode is started. Therefore, as compared with a case where a switch having a display means is separately provided for each of the above two heat retaining modes, the number of parts is reduced, cost can be reduced, and improvement in operability can be expected.

[0038]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a rice cooker according to the present invention will be described in detail with reference to the accompanying drawings.

FIGS. 1 to 3 show a specific configuration of a rice cooker according to an embodiment of the present invention. This rice cooker 1 can serve both rice cooking and heat preservation and reheating during heat preservation as will be described later. For example, as shown in FIGS. A container comprising a bottomed cylindrical inner case 3 made of synthetic resin formed so as to set an inner pot (rice cooker) 2 made of steel or the like, and a cylindrical outer case 4 supporting the inner case 3. It has a main body. A lid unit 5 is provided on the upper part of the container body so as to be openable and closable.

As shown in FIGS. 1 and 2, concentric first and second ribs 91 and 92 are provided on the bottom 3a of the inner case 3, as shown in FIGS. The two coils 91a and 92b are configured so that the coils 7a and 7b of the work coil 7 composed of two sets of inner and outer coils 7a and 7b can be fitted at predetermined intervals. The coils 7a, 7b are joined to both the inner and outer bottom fitting surfaces of the radial direction via the first and second ribs 91, 92 via an adhesive. Note that the work coil 7 corresponds to "heating and cooking means" in the claims.

The outer case 4 has a cylindrical cover portion 4a formed of a synthetic resin plate, a synthetic resin shoulder portion 4b joined to an upper end of the cover portion 4a, and a lower end of the cover portion 4a. And a bottom portion 4c made of synthetic resin coupled to the bottom portion 3c of the inner case 3 to form a space 6 having a predetermined width between the bottom portion 3a of the inner case 3 and a bottomed cylindrical shape. As described above, the inner case 3 made of a synthetic resin having a bottomed cylindrical shape for setting the inner pot 2 so as to be able to be taken out is supported. Further, below the bottom 3a of the inner case 3, the coils 7a and 7b of the work coil 7 and the coil base 8 are provided so as to be positioned vertically. Further, a control board 36 having a power component such as a work coil control circuit is provided below the coil stand 8.

The coil stand 8 has a work coil supporting portion 8a having a receiving tray-shaped inner case supporting surface for supporting the work coil 7, and a ferrite core fitting groove 9 formed in the work coil supporting portion 8a. , 9 and legs 10, 10 provided below the work coil support portion 8, and are supported on the outer case bottom 4c by the legs 10, 10. Further, on the outer peripheral surface of the side of the work coil supporting portion 8a of the coil stand 8, one end (outer peripheral end) of each of the ferrite core fitting grooves 9, 9,. A pair of spacers 11, 11 are provided, and a ring-shaped magnetic shielding plate 12 is fitted and fixed from the lower side around the outer periphery of the pair of spacers 11, 11 while maintaining a predetermined interval therebetween.

The ferrite core fitting grooves 9, 9.
The ferrite cores 13 and 13 are formed, for example, so as to extend in the radial direction at intervals of 90 degrees in the circumferential direction, and penetrate vertically, and at predetermined intervals in the radial direction. Is fitted.

Further, an opening having a predetermined diameter is formed in a portion of the coil base 8 corresponding to the thin portion 30 of the inner case bottom 3a, and the opening above the work coil supporting portion 8 is formed through the opening. A temperature fuse holder 14 having an H-shaped cross section standing upright is detachably mounted, and the cylindrical temperature fuse 15 inserted into the insulating tube by the temperature fuse holder 14 is attached to the bottom 3a of the inner case 3. Is supported in a state of contacting the lower surface 30a of the thin portion 30.

That is, the thermal fuse holder 14 is provided with the thermal fuse 15
And a part of the lower side wall is bent outwardly in the horizontal direction so as to be attached to the lower surface of the coil base 8.
The mounting portion 14b is fixed to the lower surface of the coil base 8 with screws from the lower side in a detachable state by fastening with screws.

On the other hand, the bottom part 3a and the side wall part 3b of the inner case 3 are integrally formed, and the central part of the bottom part 3a and the central part of the work coil supporting part 8a of the coil stand 8 are provided with:
Center sensor storage space penetrated concentrically in the vertical direction
(Fit insertion hole) 17 is formed, and the center sensor 22 is provided in the center sensor storage space 17 so as to be vertically movable and constantly urged upward by the coil spring 18. Have been. Further, a heat retaining heater 65 (corresponding to "heat retaining means" in the claims) is disposed outside the side wall member 3b.

The center sensor storage space 17 is formed in a cylindrical body 19 formed by a rib extending in both the upper and lower directions at the center of the coil stand 8, and a sensor cover 20 is fitted into a lower opening thereof. , Screws 21 are fixed to the pressure wall portion on one side of the cylinder body 19 on the coil stand 8 side.

In the center sensor 22, for example, a temperature fuse for detecting an abnormal temperature is not provided in the sensor holding portion 94 at the upper end inside the cylindrical sensor holder 22a.
First and second thermistors (temperature sensors) 23 and 2 for detecting the temperature of the inner pan 2 considerably smaller than the temperature fuse.
And a small-diameter sensor holding section provided only with the small first and second thermistors 23 and 24 on the upper surface of the sensor holding section 94 at the upper end of the sensor holder 22a. A sensor cap 25 made of a metal material having a small diameter enough to cover 94 and having good thermal conductivity is integrally fitted and fixed. Then, below the upper side edge 26 of the cylindrical sensor holder 22a,
A ring-shaped shield member 93 provided with a lip portion 93a for shielding in the circumferential direction is fitted, and a sensor is provided by a coil spring 18 interposed between the shield member 93 and the cover surface 27 of the lower sensor cover 20. The entire holder 22a is supported in a state where it can be raised and lowered and is constantly urged upward so as to be in contact with the bottom 2a of the inner pan 2.

The sensor holder 9 in the sensor holder 22a
A lower portion of the lower portion 4 extends downward by a predetermined length in a rectangular tube shape to form a reed switch mounting portion 96 at a lower end portion, while a cylindrical magnet mounting portion 95 is formed on the lower sensor cover 20. . Then, the magnet 28 attached to the magnet attaching portion 95 and the reed switch 29 attached to the reed switch attaching portion 96 come into contact with and separate from each other in accordance with the elevating operation of the sensor holder 22a.
The reed switch 29 is turned on and off,
The non-set and set states of the inner pot 2 are detected by the OFF signal. Reference numeral 34 denotes an ascending position regulating edge of the sensor holder 22a of the inner case bottom 3a. The edge 34 stands up a predetermined height above the upper surface of the inner case bottom 3a. 17 is prevented from invading water or the like.

On the other hand, on the side of the shoulder 4b of the outer case 4 opposite to the hinge mechanism 40, an operation panel 56 constituting an operation section is provided. As shown in FIG. 4, the operation panel 56 includes various switches necessary for rice cooking, that is, a reservation switch 46 for setting a reservation time for rice cooking, and a heat insulation switch 47 for starting heat insulation and selecting a heat insulation mode.
And a reheating switch 48 for starting reheating during heat retention;
The hour switch 49 for setting the time digit of the time and the minute switch 50 for setting the minute digit, the rice cooking switch 51 for selecting the rice cooking course, the rice cooking switch 74 for starting the rice cooking menu, and the running program Each switch of a cancel switch 53 for returning to an initial state and a liquid crystal display unit 54 (corresponding to “current time display means” in claims 7 and 8 of the claims) are provided.

The warming switch 47 in this embodiment is configured to start warming and select a warming mode, that is, select between "warming" and "new warming" by one operation. In response to the above, two display means of a heat retention LED 47a and a new heat retention LED 74b are provided, and every time the heat retention switch 47 is operated, "heat retention" → "new heat retention" →
The two heat retention modes are alternately switched in order from "heat retention" to "new heat retention". Further, the heat keeping switch 47 corresponds to a “switch” operated in claim 9 and a “heat keeping switch” in claim 10, respectively. Further, the two LEDs 47a and 47b provided on the heat-retaining switch 47 correspond to "heat-retaining display means" in claim 6 of the claims.

Here, two modes of heat retention, "heat retention" and "new heat retention" selected by the above-mentioned heat retention switch 47 will be described. First, "warming" is a conventional warming mode, for example, a mode in which rice is fixedly controlled to a high temperature of 72 ° C. On the other hand, “new heat insulation” is a heat insulation mode newly adopted in the rice cooker 1 of this embodiment, and has two control programs of a high-temperature insulation of 72 ° C. and a low-temperature insulation of 60 ° C. Is used, for example, depending on the current time. Note that these “heat retention” and “new heat retention” will be described in detail in a control example described later.

The lid unit 5 is fitted with an outer cover 37 made of a synthetic resin, which constitutes the outer peripheral surface thereof, and is fitted inside the outer peripheral edge of the outer cover 37, so that the lid unit 5 is engaged with the inner pot 2. Frame 38 made of synthetic resin and the inner frame 38
The outer cover 37 and the heat radiating plate 57 are formed in a hollow structure by a heat radiating plate 57 fitted with the inside and having a lid heater 64. Is joined to. The lid unit 5 is rotatably attached to a shoulder 4b of the outer case 4 via a hinge mechanism 40, and has an open end engaged with a predetermined position of the lid unit 5. A lock lever 39 for opening and closing the lid unit 5 is provided.

In addition, approximately in the center of the lid unit 5,
The vapor discharge port 43 is formed so as to penetrate vertically.
A rubber packing 45 is provided in the steam discharge port 43.
Are fitted, and the vapor discharge cylinder 44 is attached via the packing 45.

The lid heater 64, the work coil 7, and the heat retaining heater 65 constitute a reheating means in the claims.

Next, the configuration of the electric control circuit section in the electric rice cooker of this embodiment will be described with reference to the electric circuit diagram shown in FIG. Parts corresponding to the respective parts shown in FIGS. 1 to 3 are denoted by the same reference numerals.

First, the electric power from the commercial AC power supply 62 is supplied to the lid heater 64 and the heat retaining heater 65 via the temperature fuse 15 that detects and abnormally heats the inner pot 2 and is cut off by the step-down transformer 68. And rectifier 69
And supplied to the microcomputer unit 61 as its power supply power. The electric power from the commercial power supply 62 is supplied to the work coil 7 via the diode bridge 67 and the choke coil 66. Reference numeral 7
0,71 is a smoothing capacitor, 72 is a resonance capacitor, 7
3 is a diode.

The work coil 7, the heater 65 and the lid heater 64 are connected in parallel with each other. Between the heat retaining heater 65 and the commercial AC power supply 62, and between the lid heater 6
Triacs 75 and 76 are connected between the power supply 4 and the commercial AC power supply 62, respectively. Gates of these triacs 75 and 76 have PNPs that are ON / OFF controlled by a command from the microcomputer unit 61.
Control signals from the transistors 77 and 78 are supplied. The work coil 7 is turned ON / OFF by a command from the microcomputer unit 61.
A control signal is supplied from a switching transistor 75 that is controlled to be OFF.

The microcomputer unit 61
Operates based on a clock signal from a reference frequency generation circuit (OSC) 80 and controls the transistors 74, 77, and 78 according to a predetermined program, thereby controlling the work coil 7, the lid heater 64, and the heat retaining heater 65. Control energization. This energization control is performed based on output signals from thermistors 23 and 24 built in the center sensor 22. Reference numerals 46 to 53 denote the above switches, reference numeral 79 denotes a timer setting display, reference numeral 54 denotes a liquid crystal display means forming the display section, and reference numeral 55 denotes a buzzer which emits a notification sound upon completion of rice cooking.

The microcomputer unit 6
Reference numeral 1 is a functional unit that controls the energization of the work coil 7 during rice cooking and the energization control of the work coil 7 according to the rice cooking menu.

By the way, in the rice cooker 1 of this embodiment, various control methods are applied to keep the temperature of cooked rice in relation to reheating and convenience in actual use by applying the present invention. doing. Hereinafter, these control examples will be sequentially described.

As described above, in this embodiment, two heat retention modes are selected in the heat retention step. Of these, one is a mode in which the temperature is kept at a high temperature of 72 ° C. as in the related art, and this is simply referred to as “heat retention” in the following description and description of the flowchart. The other is a mode newly adopted in this embodiment, in which 72
This is an embodiment in which a high-temperature insulation of 60 ° C. and a low-temperature insulation of 60 ° C. can be selected, and this is hereinafter referred to as “new insulation”. Therefore, the “heat retention” corresponds to the “first heat retention mode” in the claims, and the “new heat retention mode” corresponds to the “second heat retention mode” in the claims.

First Control Example The first control example is a reheating control example for avoiding inconvenience when reheating is performed in the "new heat retention". In other words, in the "new heat preservation", a low temperature preservation at 60 ° C. and a high temperature preservation at 72 ° C. are selected. The case of low-temperature insulation is lower than the case of high-temperature insulation. Therefore, if the reheating time is the same between the case of reheating at low temperature and the case of reheating at high temperature, there is a difference in the rice temperature at the end of reheating. This difference in the rice temperature is minimized so that the rice temperature at the end of the reheating is almost the same regardless of the reheating from any of the heat retention modes. Specifically, this is realized by making a difference in the “irregularity time” in the reheating step as described later. Hereinafter, a specific control example will be described with reference to the flowcharts shown in FIGS.

First, in the new warming routine shown in FIG. 5, for example, when the user selects "new warming" as the warming mode by operating the warming switch 47 after cooking rice, the warming LED is turned off (step A1), and at the same time, the new warming LED is turned off. The heat retention memory is set (step A2), and a new heat retention L is set.
The ED is turned on (step A3) to indicate that the heat is kept at "new heat retention", and the current time is displayed (step A4).

Next, the elapsed time is accumulated until the elapsed time of the heat retention reaches 24 hours (step A5, step A6), and the low-temperature heat preservation and the high-temperature heat preservation are set in accordance with the current time. That is, in the time zone from 6:00 am to 1:00 pm (step A7), the heat retention confirmation routine A is executed to set the high temperature heat retention (step A11), and the low temperature heat retention memory is reset (step A1).
2). In addition, the time zone from 1:00 pm to 6:00 pm (step A
In 8), the low temperature heat retention is set by executing the heat retention confirmation routine B (step A13), and the low temperature heat retention memory is set (step A14). Further, in the time period from 6:00 pm to 9:00 pm (Step A9), the high-temperature heat retention is set by executing the heat retention confirmation routine A (Step A15), and the low-temperature heat retention memory is reset (Step A16). In other time zones, the low temperature heat retention is set by executing the heat retention confirmation routine B (step A17), and the low temperature heat retention memory is set (step A18). In this way, by setting the low-temperature and high-temperature insulation according to the time zone, the rice is heated warmly during the meal time and the rice can be eaten deliciously. By maintaining the temperature at a low temperature, the deterioration of the rice is delayed, and the temperature can be kept for a long time.

If it is determined in step A5 that the heat retention elapsed time has already passed 24 hours, the integration of the heat retention elapsed time is terminated (step A10), and the heat retention confirmation routine A in step A11 is continued. Move to

Here, the above-described heat retention confirmation routines A and B will be described with reference to FIGS. 8 and 9, respectively. The heat retention confirmation routine A is a high temperature heat retention setting routine, and first determines whether or not the current rice temperature is 70 ° C. or less (step A151). If the temperature is 70 ° C. or lower, the fan motor is turned on (step A152), and the work coil is set and turned on by 6/16 (steps A153, 154).
Further, the heat insulation heater is turned ON for 16.13.5 (step A155), and the lid heater is turned ON for 6/16.
N (step A156), and the rice is quickly heated.

On the other hand, if the temperature is 70 ° C. or higher, the fan motor is first turned off (step A157), and it is determined whether the rice temperature is 72 ° C. or lower (step A158). Here, if the temperature is 72 ° C. or lower, a work coil is set and this is reduced by 1/16 to O.
N (steps A159 and 160) and turns on the heat retention heater by 16 / 10.5 (step A16).
1) Further, the lid heater is turned ON by 2.5 / 16 (step A162), and the rice is heated relatively slowly. When the temperature is 72 ° C. or higher, almost no heating is required, so that both the work coil and almost the heater are O
FF is performed (steps A163 and 164), and only the lid heater is turned ON by 2.5 / 16. With this control, the rice is kept at a temperature near 72 ° C.

The heat retention confirmation routine B is a low temperature heat retention setting routine. First, in step A171, it is determined whether or not the current rice temperature is 60 ° C. or less. Where 6
If the temperature is 0 ° C. or lower, the work coil, the heat retaining heater, and the lid heater are all turned on (step A172 to step A175) to quickly heat the rice. On the contrary,
If the temperature is 60 ° C. or higher, both the work coil and the heat retaining heater are turned off, and heating is performed only by the lid heater (step A176, step A177, step A1).
75). By such control, the rice is kept at a temperature near 60 ° C.

Returning to FIG. 5, after either low-temperature insulation or high-temperature insulation is set as the heat insulation mode according to the current time, the power failure is confirmed (step A1).
9), reheating switch (“KHs” in the flowchart)
w) is operated (step A20).

Here, when the reheating switch is operated, the current rice temperature is set to 60 ° C. in step A21.
It is determined whether or not the temperature is below. If the temperature is equal to or higher than 60 ° C., a reheating program described later is executed to reheat the rice (step A22). On the other hand, if the temperature is 60 ° C. or lower, the buzzer is notified (step A23),
If the reheating switch has not been operated, the buzzer is not notified and the process proceeds to step A24.
Move to

In step A24, it is determined whether or not an hour switch (indicated as hour sw in the flowchart) has been operated.
4 (refer to FIG. 3), the elapsed time of the heat retention is displayed in place of the current time displayed so far (step A25).
The display of the elapsed time of the heat retention is indicated by the power failure confirmation (step A).
While performing 26), the above operation is continued only while the switch is operated.

If the hour switch has not been operated or has been operated but has been released, it is determined in step A27 whether or not the warming switch (indicated as NHsw in the flowchart) has been operated.
If the operation has not been performed, the process returns to step A2 in order to continue the heat retention at the current “new heat retention”. On the other hand, when the heat retention switch is operated, the new heat retention memory is reset in step A28 in order to keep the temperature at "heat retention", the new heat retention LED is turned off in step A29, and the buzzer is notified (step A30). ), Then
The fan motor is turned off (step A31), and a program for "warming" described later is executed (step A3).
2).

Next, the reheating routine of FIG. 6 will be described. If it is determined in step A21 of the new heat retention routine of FIG. 5 that reheating is necessary, the routine shifts to this reheating routine and executes the reheating program. I do.

First, both the heat-retention LED and the new heat-retention LED are turned off (steps A41 and A42), the reheating switch (NHsw) is turned on, and the number of times the reheat switch is turned on is counted (step A43). Further, the start of reheating is notified by a buzzer (step A44), and the “mura process” is performed.
A 300-second timer, which is one of the criteria for the start of the process, is started (step A45).

At this point, the reheating step is actually started. First, in step A46, the fan motor is turned ON, and in step A47, the rice cooker LED is turned on and off to indicate that it is the reheating step. Further, the work coil is set and turned ON by 12.0 / 16 (steps A48, 49), and the lid heater is turned ON by 6.0 / 16.
N (step A50), and further, the heat retention heater is set to 13.
Only 5/16 is turned ON (step A51), and the rice is rapidly reheated by these.

After the reheating is started, the rice temperature becomes 11
Reheating is continued until the temperature reaches 0 ° C. or 300 seconds have elapsed after the start of reheating. That is, the rice temperature is 110
° C or lower and before 300 seconds (step A
55, 56), the power failure is confirmed (step A57),
The current time is lit and displayed (step A58). Thereafter, it is determined in step A59 whether or not the heat retention time has elapsed for 24 hours. If so, the calculation of the heat retention elapsed time is terminated (step A61). If not, the elapsed time of the heat retention is calculated, and the process returns to step A46 again. When the hour switch is operated during the reheating (step A52), the elapsed time of the heat retention is lit (step A53) instead of the current time while the switch is operated, and the power failure occurs. Confirmation is performed (step A54).

On the other hand, as the reheating proceeds, the rice temperature becomes 11
When the temperature reaches 0 ° C. or when the reheating duration time exceeds 300 seconds, the process shifts to “mura” in the reheating step.
That is, first, at step A62, the current time is turned off, and at step A63, it is determined whether or not the low-temperature keeping memory is set. Here, steps A11 and A12, and step A1 of the new heat retention routine of FIG.
3, 14, step A15, 16, step A17, 1
As shown in FIG. 8, the current low-temperature memory is not set for "high-temperature heat retention", and the low-temperature heat-retention memory is set for "low temperature heat retention". The remaining time (that is, the “irregular time” is set. That is, at the time of high-temperature keeping where the low-temperature keeping memory is not set, the remaining reheating time is set to 5 minutes (step A64), and the low temperature where the low-temperature keeping memory is set is set. At the time of heat retention, the remaining time of reheating is set to 10 minutes (step A65) In this way, the “irregularity time” in the reheating with the high temperature thermal insulation is set shorter than the “irregularity time” in the reheating with the low temperature thermal insulation. In this way, the difference in the rice temperature at the start of reheating is compensated by providing a difference at the “irregular time”, the rice temperature at the end of reheating is almost the same, and the user has low heat retention. Even kept regardless of which even high-temperature thermal insulation in which can always eat rice at the same temperature. After setting the reheating remaining time,
In step A66, the remaining time is calculated and displayed in minutes, and in step A67, the cooked rice LED is blinked.

Next, in step A68, it is determined whether or not the reheating switch (KHsw) has been operated twice or more. In this determination, the quality of rice deteriorates as the number of times of reheating increases, so if the reheating is performed two or more times, the "murashi temperature" is set lower than in the case of the first reheating, and the quality of rice deteriorates It is for suppressing. That is, when it is the first reheating, it is first determined in step A69 whether or not the current rice temperature is 110 ° C. or less,
If the temperature is lower than 110 ° C., the work coil is set and turned on (steps A70 and A71).
If the temperature is not lower than ° C, the work coil is turned off (step A76). On the other hand, if it is the second or more reheating, it is determined in step A72 whether the current rice temperature is 100 ° C. or less, and if it is 100 ° C. or less, the work coil is set. This is turned on (steps A74 and A75), but if the temperature is higher than 110 ° C., the work coil is turned off (step A7).
3). After the ON or OFF setting of the work coil, the lid heater is turned on in step A77, and the heat retention heater is turned on in step A78.

Next, in step A79, the remaining time becomes 0.
(I.e., determine whether "Murashi" has been completed, and if "Murashi" has not been completed, determine whether the hour switch has been operated. Further, in step A89, a power failure is confirmed, and in step A90, it is determined whether or not the heat retention elapsed time has exceeded 24 hours, and if it has, the calculation of the heat retention elapsed time is terminated (step A9).
2) If the time has not reached 24 hours, after calculating the heat retention elapsed time (step A66), the process returns to step A66 in order to continue the "mura".

If the hour switch is operated in step A88, the current time is displayed instead of the remaining time while the operation is continued, and the power failure is confirmed (step A94). .

On the other hand, if it is determined in step A79 that the "murashi" has ended, the buzzer is notified three times while confirming the power failure to end the "murashi" (steps A81 and A95). The work coil is turned off (step A82), the fan motor is turned off (step A83), and the rice cooking LED is turned off (step A84). Then, it is determined whether or not the new heat retention memory is set (step A85), and if it is set, the above-mentioned "new heat retention" program is executed to return to the heat retention by "new heat retention" (step A85). A87)
If is not set, the program of "warming" described below is executed to shift to warming by "warming" (step A86).

Next, with reference to FIG. 7, a description will be given of a warming routine for performing the warming in the "warming". When the user selects "Heat preservation", or when "Heat preservation" is selected in step A86 of the above-described reheating routine, first, in step A101, the buzzer notifies the user of the execution of the heat preservation in "Heat preservation". The menu is turned off (step A102). Next, in step A103, counting of the elapsed time of heat retention is started, and the heat retention LED is turned on (step A104).
Then, a 16-second timer starts (step A).
105). The 16-second timer is provided to take time to turn on only the heat retention heater and the lid heater and check the power supplied thereto, as described later.

After the start of the 16-second timer, first, a power failure is confirmed (step A106), and the current time is lit and displayed (step A107). Thereafter, both the heat retention heater and the lid heater are turned on (step A108,
109). Here, if 16 seconds have elapsed, the process proceeds to a warming step described below. Until 16 seconds have elapsed, it is first determined in step A134 whether or not the reheating switch (KHsw) has been operated. In step A135, it is determined whether or not the current rice temperature is equal to or lower than 60 ° C., and if it is equal to or higher than 60 ° C., the process proceeds to the reheating step described above (step A136). On the other hand, 60
If the temperature is lower than ℃, there is a problem that rot is caused by passing through the rot temperature range when reheated, and there is a problem that deterioration of rice proceeds due to too long heating time. A buzzer is notified that the temperature is not higher than 60 ° C. without heating (step A137), and a heat insulation switch (NHs) is set in step A138.
It is determined whether or not w) is operated. Here, when the heat insulation switch is operated, the process directly shifts to the above-described “new heat insulation” heat insulation process (step A140).
If the heat retention switch has not been operated, it is next determined in step A139 whether the hour switch (hour sw) has been operated, and if it has been operated, the current time is replaced by the current time only during the operation. The elapsed time is lit and displayed (step A141) and a power outage is confirmed (step A142). If the heat retention switch has not been operated, or if it has been operated but has already been released, the process returns to step A106.

On the other hand, if it is determined in step A110 that 16 seconds have elapsed, the process actually shifts to the warming step.
That is, first, a power failure is confirmed in step A111, and the heat retention LED is turned on in step A112. Thereafter, in step A, it is determined whether the heat retention time has elapsed for 24 hours. Here, after the elapse of 24 hours, after calculating the heat retention elapsed time (step A114), and after the elapse of 24 hours, the calculation of the heat retention elapsed time is terminated (step A115). The process shifts to step A116 to display the current time.

Next, in step A117, it is determined whether or not the current rice temperature is 72 ° C. or less.
If the temperature is not more than ℃, the work coil, the heat retention heater and the lid heater are both turned on (step A12).
1 to A124), but when the temperature is equal to or higher than 72 ° C., there is no need for heating, and the work coil, the heat retaining heater, and the lid heater are both turned off (steps A118 to A12).
0).

Next, in step A125, it is determined whether or not the reheating switch (KHsw) has been operated, and if it has been operated, it is determined whether or not the current rice temperature is below 60 ° C. If, the process proceeds to the above-described reheating step (step A128). On the other hand, when the temperature is 60 ° C. or lower, the buzzer is notified (step A127), and then the process proceeds to step A129.
If the reheating switch has not been operated, the flow directly proceeds to step A129 without notifying the buzzer.

In step A129, it is determined whether or not the heat retention switch (NHsw) has been operated, and if it has been operated, the process proceeds to the above-mentioned "new heat retention" heat retention program. On the other hand, if the heat retention switch has not been operated, it is determined whether or not the hour switch (hour sw) has been operated in step A130. The elapsed time of the heat retention is displayed instead of the time (step A133), and the power failure is confirmed (step A132).

If the hour switch has not been operated, or if it has been operated but has been released, the process returns to step A111 to continue the warming process.

As described above, in this control example, the low-temperature heat-retention memory is set based on the low-temperature heat-retention and the high-temperature heat-retention set in accordance with the time zone, and based on the contents of the low-temperature heat retention memory, By making the difference in the "irregularity time", the rice temperature at the end of reheating is made almost the same temperature, so that the user can always eat deliciously the same temperature rice (step in FIG. 6). A63 to A65).

Also, steps A27 to A32 in FIG. 5, steps A129 and A130 and step A in FIG.
As shown at 138 and 140, "insulation" and "new insulation" can be alternately selected by operating one insulation switch,
In addition, the LED corresponding to these can be turned on.

In this control example, steps A63, A64, and A65 in FIG.
Corresponds to the reheating time setting means. Steps A85, A86, and A87 are described in claim 3.
Corresponds to the heat retention mode setting means.

SECOND CONTROL EXAMPLE The second control example has the same purpose as that of the above-described first control example, and differs from the first control example in terms of time. Set the low-temperature insulation memory corresponding to the high-temperature insulation and the low-temperature insulation set according to the band, and adjust the time of the irregular heating process of reheating with `` new insulation '' according to the contents of this low-temperature insulation memory, Although the rice temperature at the end of reheating was set to be the same regardless of reheating from low-temperature insulation or reheating from high-temperature insulation, in this control example, the rice temperature was directly adjusted. Detecting and setting the low-temperature memory based on the temperature, and adjusting the time of the irregular heating process of the reheating in "new heat" based on the content of the low-temperature memory, thereby achieving the same purpose. It was made. Hereinafter, the control will be described with reference to FIGS.

First, a new heat retention routine shown in FIG. 10 is executed. In this routine, a heat retention confirmation routine (steps B11 to B14) is executed in accordance with a time zone, and the process directly proceeds to execution of a new heat retention program. The only difference from the new warming routine in the first control example is that the low-temperature warming memory is not set or reset after the execution of the warming confirmation routine. Is the same as Therefore, further description is omitted here, and the description of the new heat retention routine in the first control example is cited.

Next, the reheating routine shown in FIG. 11 has the same basic structure as the reheating routine (see FIG. 6) in the first control example, and is different therefrom. The point is the setting and resetting process of the low-temperature memory. Therefore, here, only the setting and resetting steps of the low-temperature keeping memory will be described, and the description of the reheating routine in the first control example will be used for the other portions.

That is, in the second control example, after shifting to the reheating routine, it is first determined in step B51 whether or not the current rice temperature is 70 ° C. or higher. If the temperature is equal to or lower than 70 ° C., it is determined that the apparatus is in the low-temperature keeping state. In this case, the low-temperature keeping memory is set in step B52. On the other hand, in step B51,
When it is determined that the temperature is equal to or higher than 70 ° C., it is determined that the apparatus is in the high-temperature heat-retaining state, and the low-temperature heat-retention memory is reset in step B53.

Thereafter, it is determined in step B76 whether or not the low-temperature keeping memory is set. If the low-temperature keeping memory is set, reheating is started from the low-temperature keeping. In this case, the remaining reheating time is set to 10 minutes. (Step B7
7) If it is not set, the reheating time is set to 5 minutes because reheating from high-temperature keeping is performed (step B).
78).

As described above, the reheating remaining time is made different depending on whether reheating is performed during low-temperature or high-temperature insulation, so that reheating is performed regardless of the state of reheating. The rice temperature at the end point can be made substantially the same.

In this control example, steps B76, B77 and 78 in FIG. 11 are described in claim 2.
Corresponds to the reheating time setting means. Steps B85, B86, and 87 are described in Claim 3.
Corresponds to the heat retention mode setting means.

Third Control Example In the third control example, if the elapsed time of the heat retention in the rice cooker is long, the quality of the rice during the heat retention becomes so bad that it becomes impossible to eat deliciously. This is a control example to warn that it is a long-time heat retention. In addition, in both the "heat retention" and "new heat retention", consideration is given so that a long-time heat retention warning can be given at a time suitable for the heat retention state It was done. Hereinafter, this control example is shown in FIG.
2 and FIG.

FIG. 12 shows a new warming routine in this control example. In this new heat retention routine, for example, when the user selects “new heat retention” as a heat retention mode by operating a heat retention switch after cooking rice, the heat retention LED is displayed.
Is turned off (Step C1), and at the same time, a new heat retention memory is set (Step C2), and the current time is lit (Step C3).

Next, it is determined whether or not the elapsed time of the heat retention has reached 30 hours (step C4). If the elapsed time has not reached 30 hours, the new heat-retention LED is turned on in step C5. Is multiplied. On the other hand, if the heat retention elapsed time has already reached 30 hours, in step C10 the new heat retention L
By flashing the ED to warn the user that the heat is kept for a long time, the accumulation of the heat keeping elapsed time is ended in step C11. Further, after the completion of the integration of the heat retention elapsed time, a heat retention confirmation routine A is executed, and the process proceeds to step C16. Therefore, the user can use this flashing new heat insulation L
By visually checking the ED, it is possible to easily confirm that it is kept warm for a long time, and for example, it is possible to take measures such as eating the rice earlier before the deterioration of the rice further proceeds. This is useful in terms of the convenience of using the jar.

Next, if the heat retention elapsed time has not reached 30 hours, after the accumulation of the heat retention elapsed time, one of the low temperature heat retention of the heat retention confirmation routine A and the high temperature heat retention of the heat retention confirmation routine B is performed according to the time zone. And the process proceeds to Step C16.

Next, at step C16, a power failure is confirmed, and at step C17, it is determined whether or not the reheating switch (KHsw) has been operated. Here, when the reheating switch is operated, step C
At 18, it is determined whether or not the current rice temperature is 60 ° C. or lower, and if it is 60 ° C. or higher, the reheating program is executed to reheat the rice (step C28).
On the other hand, if the temperature is not higher than 60 ° C., the buzzer is notified (step C19), and if the reheating switch is not operated, the buzzer is not notified and the process proceeds to step C20. .

In step C20, it is determined whether or not the hour switch (hour sw) has been operated, and if the time switch has been operated, the elapsed time of heat retention is displayed in place of the current time displayed so far (step C21). ). The display of the elapsed time of the heat retention is continued only while the switch is operated while the power failure is being confirmed (step C22).

If the hour switch has not been operated or has been operated but has been released, it is determined in step C22 whether or not the heat retention switch (NHsw) has been operated. Returns to step C2 to keep the current "new heat retention". On the other hand, if the heat retention switch is operated, the process proceeds to step C23 in order to maintain the temperature at “heat retention”.
In step C24, the new heat-retention memory is reset, the new heat-retention LED is turned off in step C24, the buzzer is notified (step C25), the fan motor is turned off (step C26), and the program proceeds to the "heat retention" program described later (step C26). Step C27).

Next, the warming routine shown in FIG. 13 will be described. For example, when "warming" is selected by the user, first, in step C31, the execution of the warming in the "warming" is notified by a buzzer. The menu is turned off (step C32). Next, at step C33, the count of the heat retention elapsed time is started, the heat retention LED is turned on (step C34), and a 16-second timer is started (step C3).
5).

After the start of the 16-second timer, first, a power outage is confirmed (step C36), and the current time is lit (step C37). Thereafter, both the heat retention heater and the lid heater are turned on (step C38, C3
9). Here, if 16 seconds have elapsed, the process proceeds to a warming step described later.
In 65, it is determined whether or not the reheating switch (KHsw) has been operated.
In 6 it is determined whether or not the current rice temperature is 60 ° C. or lower, and if it is 60 ° C. or higher, the process proceeds to the reheating step (step C67). On the other hand, if the temperature is not higher than 60 ° C., reheating is not performed, the buzzer is notified that the temperature is not higher than 60 ° C. (step C68), and it is determined whether or not the heat retention switch (NHsw) has been operated in step C69. Here, when the heat retention switch is operated, the process directly proceeds to the above-described “new heat retention” heat retention step (step C70). If the heat retention switch has not been operated, it is next determined in step C71 whether or not the hour switch (hour sw) has been operated, and if the time switch has been operated, the current time is replaced by the current time only during the operation. The elapsed time is lit and displayed (step C72), and a power failure is confirmed (step C73). If the heat retention switch has not been operated, or if it has been operated but has already been released, the process returns to step C36.

On the other hand, if it is determined in step C40 that 16 seconds have elapsed, the process actually shifts to the heat retaining step. That is, first, in step C41, a power outage is confirmed, and in step C42, it is determined whether or not the heat retention elapsed time has exceeded 24 hours. Here, the heat retention elapsed time is 2
If the time has not reached 4 hours, the heat keeping LED is turned on in step C43, and the heat keeping elapsed time is integrated in step C44. On the other hand, if the elapsed heat retention time has already reached 24 hours, step C45
In step C46, the user keeps the LED kept blinking to warn the user that the heat is kept for a long time, and terminates the integration of the elapsed time in step C46.

Therefore, the user can easily confirm that the heat is kept for a long time by visually checking the blinking heat keeping LED. For example, the user eats the rice quickly before the deterioration of the rice proceeds further. And so on. This is the same as in the case of “new heat retention”. However, in the case of this "heat retention", the heat retention time as a reference for the long-time heat retention warning is set to 24 hours, whereas in the above-mentioned "new heat retention", the heat retention time as the reference for the long time heat retention warning is given. Is set to 30 hours, which is a great difference between the two. The reason for giving a difference in the heat retention time as a warning criterion is based on the following reason. That is, in the "new heat preservation", the high temperature preservation and the low temperature preservation are selectively executed, whereas in the "heat preservation", only the high temperature preservation is performed. Progress of "warm" is faster than "new warm". For this reason, in the "new heat insulation" in which the deterioration of rice is progressing slowly, the warming time serving as a warning standard is extended to 30 hours, and in the "heat keeping" in which the deterioration of rice is progressing fast, the warming time serving as a warning is set to 24 hours. It is shortened. By giving a difference in the heat retention time as such a warning criterion, the deterioration state of the rice at the time when the warning is actually given is almost the same regardless of the heat retention, and for example, the heat retention for a long time even though the rice has not changed much yet Warning is not issued, and the reliability of the long-time warming warning is improved accordingly.

Next, in step C47, the current time is displayed, and in step C48, it is determined whether or not the current rice temperature is 72 ° C. or less.
If the temperature is not more than ℃, the work coil, the heat retention heater and the lid heater are both turned on (step C52).
When the temperature is 72 ° C. or higher, there is no need for heating, and the work coil, the heat retaining heater, and the lid heater are turned off (steps C49 to C51).

Next, in step C56, it is determined whether or not the reheating switch (KHsw) has been operated, and if it has been operated, it is determined whether or not the current rice temperature is 60 ° C. or less, If, the process proceeds to the above-described reheating step (step C59). On the contrary,
If the temperature is equal to or lower than 60 ° C., the buzzer is notified (step C58), and the process proceeds to step C60. If the reheating switch has not been operated, the process directly proceeds to step C60 without notifying the buzzer.

In step C60, it is determined whether or not the heat retention switch (NHsw) has been operated, and if it has been operated, the process proceeds to the above-mentioned "new heat retention" heat retention program. On the other hand, when the heat retention switch is not operated, in step C61, the hour switch (hour s)
It is determined whether or not w) has been operated, and if it has been operated, the elapsed time of the heat retention is displayed instead of the current time only while the operation is continued (step C63) and the power failure is confirmed (step C64). .

If the hour switch has not been operated, or if it has been operated but has been released, the process returns to step C41 to continue the warming process.

As described above, according to this control example, it is possible to reliably notify the user of the long-term heat retention by blinking the heat retention LED or the new heat retention LED, thereby ensuring high convenience in using the rice cooker. At the same time, by setting the heat retention elapsed time as a reference for issuing the long-time heat retention warning according to the characteristics of "heat retention" and "new heat retention", a warning suitable for these heat retention characteristics can be provided. .

In this control example, step C4 in FIG. 12 and step C42 in FIG. 13 correspond to the warning reference time setting means in claim 6 of the present invention.
Step C10 in FIG. 12 and step C10 in FIG.
45 corresponds to the warning means in claim 6 of the claims. Further, step C6 in FIG. 12 and step C44 in FIG. 13 correspond to the warming time integrating means in claim 6 of the claims.

FOURTH CONTROL EXAMPLE This fourth control example relates to a method of warning for a long-time heat retention similarly to the third control example. The difference from the warning method in the third control example is that In the three control examples, a warning is issued to the user by blinking the warming LED or the new warming LED.
In this control example, as described below, the current time is blinked to issue a long-term warming warning. Hereinafter, this control will be described with reference to a case of a warming routine shown in FIG.

In the warming routine of FIG. 14, first, in step D1, the buzzer notifies the user of the execution of the warming in "warming" and the menu is turned off (step D2).
Next, in step D3, counting of the elapsed time of the heat retention is started, and the heat keeping LED is turned on (step D3).
4) Then, a 16-second timer is started (step D5).

After the start of the 16-second timer, first, the power failure is confirmed (step D6), and both the heat retention heater and the lid heater are turned on (steps D7 and D8). Here, if 16 seconds have elapsed, the process proceeds to a warming step described later. Until 16 seconds have elapsed, it is first determined in step D34 whether or not the reheating switch (KHsw) has been operated. In step D35, it is determined whether or not the current rice temperature is equal to or lower than 60 ° C., and if it is equal to or higher than 60 ° C., the process proceeds to the reheating step (step D36). On the other hand, if the temperature is not higher than 60 ° C., reheating is not performed, the buzzer is notified that the temperature is not higher than 60 ° C. (step D37), and it is determined in step D38 whether the heat retention switch (NHsw) has been operated.

Here, when the heat insulation switch is operated, the process directly proceeds to the above-mentioned "new heat insulation" heat insulation process (step D39). If the heat retention switch has not been operated, it is next determined in step D40 whether or not the hour switch (hour sw) has been operated, and if it has been operated, the current time is replaced with the current time only while the operation is being performed. The elapsed time is lit and displayed (step D41), and a power failure is confirmed (step D42). If the heat retention switch has not been operated, or if it has been operated but has already been released, the process returns to step D6.

On the other hand, if it is determined in step D9 that 16 seconds have elapsed, the process actually shifts to the heat retaining step. That is, first, a power failure is confirmed in step D10, and the heat retention LED is turned on in step D11. Thereafter, in step D12, it is determined whether the heat retention elapsed time has exceeded 24 hours. If the elapsed time has not reached 24 hours, the elapsed time is integrated in step D13, and the current time is lit in step D12. On the other hand, if the heat retention elapsed time has already reached 24 hours, step D
At 15, the accumulation of the heat retention elapsed time ends,
In step D16, the current time is blinked to warn the user that the heat is kept for a long time.

Therefore, the user can easily confirm that the heat is kept for a long time by visually checking the blinking current time. For example, the user eats the rice quickly before the deterioration of the rice proceeds further. And so on.

Next, in step D17, it is determined whether or not the current rice temperature is 72 ° C. or less. If the current rice temperature is 72 ° C. or less, it is necessary to heat the work coil, the warming heater, and the lid heater. ON (Steps D21 to D2
4) If the temperature is 72 ° C. or higher, there is no need for heating, and the work coil, the heat retaining heater, and the lid heater are turned off (steps D18 to D20).

Next, in step D25, it is determined whether or not the reheating switch (KHsw) has been operated, and if it has been operated, it is determined whether or not the current rice temperature is below 60 ° C. If it is, the process proceeds to the above-described reheating step (step D27). On the contrary,
If the temperature is 60 ° C. or lower, the buzzer is notified (step D28), and then the process proceeds to step D29. If the reheating switch has not been operated, the process directly proceeds to step D29 without notifying the buzzer.

In step D29, it is determined whether or not the heat retention switch (NHsw) has been operated, and if it has been operated, the process proceeds to the above-mentioned "new heat retention" heat retention program (step D30). On the other hand, if the heat retention switch has not been operated, it is determined whether or not the hour switch (hour sw) has been operated in step D31.
When the operation is performed, the elapsed time is displayed instead of the current time only while the operation is continued (step D).
32) and a power failure check (step D33).

If the hour switch has not been operated, or if it has been operated but has been released, the process returns to step D10 to continue the warming process.

As described above, according to this control example, it is possible to reliably notify the user of the long-time heat retention by blinking the current time, thereby ensuring high convenience in using the rice cooker.

In this control example, step D12 in FIG. 14 corresponds to the warning reference time setting means in claim 7 of the present invention. Step D13 corresponds to the warming time integrating means in claim 7 of the claims. Step D16 corresponds to the warning means in claim 7 of the claims. Step D
14 corresponds to the current time display means in claim 7 of the claims.

Fifth Control Example This fifth control example relates to a method of warning a long-time heat retention similarly to the third control example and the fourth control example, and the third control example and the fourth control example. Is different from the warning method in the third control example in that the heat retention LED or the new heat retention LED is blinked in the third control example, and the current time is blinked in the fourth control example, so that the user is kept warm for a long time. While a warning is issued, in the fifth control example, a warning is displayed to the user for a long time by keeping the display irrelevant to the current time or the heat retention elapsed time as described below. Is a point. Less than,
This control will be described with reference to a case of a warming routine shown in FIG.

In the warming routine of FIG. 15, first, in step E1, the buzzer is notified of the warming execution in "warming" and the menu is turned off (step E2).
Next, in step E3, counting of the elapsed time of the warming is started, and the warming LED is turned on (step E3).
4) Then, a 16-second timer is started (step E5).

After the start of the 16-second timer, first, the power failure is confirmed (step E6), and both the heat retention heater and the lid heater are turned on (steps E7 and E8). Here, if 16 seconds have elapsed, the process proceeds to a warming step described later. Until 16 seconds have elapsed, it is first determined in step E35 whether or not the reheating switch (KHsw) has been operated. In step E36, it is determined whether or not the current rice temperature is 60 ° C. or lower, and if it is 60 ° C. or higher, the process proceeds to the reheating step (step E37). On the other hand, if the temperature is not higher than 60 ° C., reheating is not performed, the buzzer is notified that the temperature is not higher than 60 ° C. (step E38), and it is determined in step E39 whether the heat retention switch (NHsw) is operated.

Here, when the heat retention switch is operated, the process directly proceeds to the above-mentioned "new heat retention" heat retention step (step E40). If the heat retention switch has not been operated, it is next determined in step E41 whether or not the hour switch (hour sw) has been operated, and if it has been operated, the temperature is changed to the current time only during the operation. The elapsed time is lit and displayed (step E42), and a power failure is confirmed (step E43). If the heat retention switch has not been operated, or if it has been operated but has already been released, the process returns to step E6.

On the other hand, if it is determined in step E9 that 16 seconds have elapsed, the process actually shifts to the warming step. That is, first, a power outage is confirmed in step E10, and the heat retention LED is turned on in step E11. Thereafter, in step E12, it is determined whether the heat retention elapsed time has exceeded 24 hours. Here, if the heat retention elapsed time has not reached 24 hours, the heat retention elapsed time is integrated in step E13. If the heat retention elapsed time has exceeded 24 hours, the integration of the heat retention elapsed time is terminated in step E14. Also shifts to step E15.

In step E15, the current time is lit and displayed. In step E16, it is determined whether or not the current rice temperature is 72 ° C. or lower. Turn on both the coil, the heat retention heater and the lid heater (steps E20 to E2).
3) When the temperature is 72 ° C. or higher, there is no need for heating, and the work coil, the heat retaining heater, and the lid heater are turned off (steps E17 to E19).

Next, in step E24, it is determined whether or not the reheating switch (KHsw) has been operated, and if it has been operated, it is determined whether or not the current rice temperature is below 60 ° C. If so, the process proceeds to the reheating step (step E26). In contrast, 60 ° C
If it is below, this is reported to the buzzer (step E2
After 7), proceed to Step E28. If the reheating switch has not been operated, the process directly proceeds to step E28 without notifying the buzzer.

In step E28, it is determined whether or not the heat retention switch (NHsw) has been operated, and if it has been operated, the process proceeds to the above-mentioned "new heat retention" heat retention program (step E30). On the other hand, if the heat retention switch has not been operated, it is determined whether or not the hour switch (hour sw) has been operated in step D31.
If operated, only while the operation is ongoing,
First, in step E31, it is determined whether or not the elapsed time of warming has exceeded 24 hours. If not, the elapsed time of warming is lit (step E32), then a power outage is confirmed (step E34), and the process proceeds to step E29. Return. On the other hand, if it is determined in step E31 that the heat retention elapsed time has exceeded 24 hours,
In step E33, a display having no relation to the warming elapsed time and the current time, for example, a numeral “88” is displayed on the display portion of the warming elapsed time, and then a power failure is confirmed (step E34), and the process returns to step E29. I do.

Therefore, the user can easily confirm that the heat is kept for a long time by visually recognizing that a numeral display completely irrelevant to the place where the heat retention elapsed time was originally displayed is displayed. For example, it is possible to take measures such as eating the rice quickly before the further deterioration of the rice proceeds, and high convenience is ensured in using the rice cooker.

In step E29, if the hour switch has not been operated, or if it is determined that the hour switch has been operated but it has already been released, the process returns to step D10 to continue the warming process.

In this control example, step E12 in FIG. 15 corresponds to the warning reference time setting means in claim 8 of the present invention. Step E13 in FIG.
Corresponds to the warming time integrating means in claim 8 of the claims. Further, step E15 corresponds to the present time display means in claim 8 of the claims. Step E33 corresponds to the display switching means and the warning means in claim 8 of the claims.

Sixth Control Example This sixth control example is a control example suitable for improving the operability of a rice cooker by minimizing the user's trouble of selecting "warming" or "new warming". Specifically, at the end of rice cooking, the same heat insulation mode as that selected in the previous heat insulation is automatically set. Therefore, the warming mode selected last time is expected to be the most frequently selected for the user, so that even if the user has the same selection philosophy in this selection, the warming mode automatically set is also set. Since it is not necessary to change the temperature, it is expected that the operability can be improved by omitting the operation of selecting the heat retention mode. Hereinafter, an example of this control will be described with reference to an example of the “mottle routine” after cooking shown in FIG.

In the swing routine of FIG. 16, first,
At the end of the rice cooking, the work coil, the heat retention heater, and the lid heater are all set to 0FF (steps F1 to F3). Next, both the reservation display and the reservation time are turned off and the spot display is turned on (steps F4 to F4).
6). Further, the subtraction of the value is displayed in minutes (step F7), and the power failure is confirmed (step F8).

Next, in step F9, it is determined whether or not the mura period has elapsed. Until the mura period has elapsed, the mura program is executed in steps F24 to F35. That is, assuming that the four-minute spot is performed (step F24), heating control is performed according to the rice cooking menu during that time.

[0143] Specifically, in the case of soft rice and sushi (step F25), the rice temperature is 10
When the temperature is 8 ° C or higher, both the work coil and the heater are turned off.
F, the uneven heating is performed only by the lid heater (steps F26, F33 to F35). If the temperature is equal to or lower than 108 ° C., the work coil, the heat retaining heater, and the lid heater are all turned on to perform the uneven heating. (Steps F30 to F3
2, F35).

Similarly, when the rice is hardened (step F27), when the rice temperature is 112 ° C. or higher, both the work coil and the heat retaining heater are turned off, and uneven heating is performed only by the lid heater (step F27). Step F26, F33 to F
35) If the temperature is 112 ° C. or less, the work coil, the heat retention heater, and the lid heater are all turned on to perform uneven heating (steps F30 to F32, F35). If the rice is of normal hardness (step F27),
When the rice temperature is 110 ° C. or higher, both the work coil and the heat retaining heater are turned off, and uneven heating is performed using only the lid heater (steps F26 and F33 to F35).
In the following cases, the work coil, the heat retention heater, and the lid heater are all turned on to perform uneven heating (steps F30 to F32, F35).

After the lapse time has elapsed (step F)
9) Turn off both the work coil, the heat retaining heater and the lid heater (steps F10 to F12), and notify the end of the spotting process, that is, the end of rice cooking, to a buzzer (step F13), and further turn off the spotting display. And the current time is displayed (steps F14 and F15).
Then, the buzzer notification and the like are confirmed by a power failure (step F2).
Execute 8 times while performing 3) (Step F16), then turn off the rice cooking LED (Step F17), turn off the fan (Step F18), further turn off the menu (Step F19), and end the rice cooking process. I do.

Next, at the end of the rice cooking process, it is determined in step F20 whether or not “new heat retention” has been selected as the previous heat retention mode by using the new heat retention memory. This time, “new heat retention” is selected as it is (step F22). If the new heat retention memory is not set, this time, “heat retention” is selected (step F21).

As described above, when rice cooking is completed, the same heat retention mode as that selected in the previous heat retention is automatically set, so that the user does not have to select the heat retention mode and the operability is reduced. It will be good.

In this control example, steps F21 and F22 in FIG. 16 correspond to the heat retention mode setting means in claim 4 of the present invention.

Seventh Control Example In the seventh control example, as in the case of the sixth control example, the operation of the rice cooker can be improved by minimizing the user's need to select “heat insulation” or “new heat insulation”. This is a control example for the purpose of improvement, and specifically, automatically shifts to the same heat retention mode as the heat retention mode selected in the previous heat retention when the heat retention selection is started. Hereinafter, this control will be specifically described with reference to FIGS.

First, in the menu specification routine of FIG. 17, first, cooking and cooking standby are selected in the menu specification flowchart of step G1. That is, when the cooking switch is already operated (step G40).
Or if the user directly specifies cooking with a required menu without depending on the menu specification flowchart (Aa to Af in FIG. 17), the program of steps G2 to G30) is executed according to the predetermined menu. Execute, but in the cooking standby state, the process proceeds from step G1 to step G31.

In step G31, it is determined whether or not the time has been set. If not, the current time is set (step G35), and the flow shifts to step G36. On the other hand, when the time is set, if neither the hour switch nor the minute switch is operated, the process directly proceeds to step G36 (steps G32 and G33), but the hour switch or the minute switch is operated. If so, a 5-second timer is started (step G34), the current time is set (step G35), and the process proceeds to step G36.

In step G36, it is determined whether or not the heat retention switch (NHsw) has been operated. If it has been operated, it is further determined in step G42 whether or not the panless memory has been set. Is set (that is, when the inner pot is not set), the buzzer is notified (step G48), and after the power failure is confirmed (step G49), the process returns to step G1.

On the other hand, if the panless memory has not been set, it is further determined at step G43 whether or not a time setting operation has been performed. (Step G44). On the other hand, if the time setting operation has not been performed, the current time setting memory is determined first in step G45. If the current time has been set, the process proceeds to the warming routine as it is (step G44), but the current time is set. If not, the current time is lit and displayed in step G46, and the current time is set in step G.
Thereafter, the process proceeds to a warming routine.

If it is determined in step G27 that the heat retention switch has not been operated, the reservation switch (TSsw) is further operated (step G3).
7) The panless memory is not set (step G3)
8) The time is set (step G39), and the process proceeds to the reserved rice cooking routine (not shown) on condition that the cooking switch is not operated, but returns to step G1 and stands by under other conditions. .

Next, the case where the process proceeds to the warming routine in step G44 in FIG. 17 is described. In this case, as shown in FIG. G52
After the memory is turned off in step, counting of the heat retention elapsed time is started in step G53.

Next, in step G54, it is determined from the new heat retention memory whether or not "new heat retention" was selected at the time of the previous heat retention, and if "new heat retention" has been selected, this time remains the same as in the previous time. The process proceeds to "new heat retention" (step G55). If "heat retention" was previously selected, the heat retention program in step G56 and subsequent "heat retention" is executed similarly to the previous time. In addition, this "warmth"
Is the same as that of the heat retention routine in the sixth control example described above, and thus further description is omitted, and the description of the heat retention routine in the sixth control example is referred to.

As described above, in the control example, the current heat retention mode is automatically set to the previously selected heat retention mode at the time of transition to the heat retention routine. The operation of selecting the heat retention mode is omitted, and the operability is improved.

In this control example, steps G54 and G55 in FIG. 18 correspond to the heat retention mode setting means in claim 5 of the present invention.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a rice cooker according to an embodiment of the present invention.

FIG. 2 is a vertical sectional view taken along the line II-II of FIG.

FIG. 3 is a view taken in the direction of arrows III-III in FIG. 2;

FIG. 4 is a diagram showing a configuration of a control circuit unit of the rice cooker shown in FIG.

FIG. 5 is a first flowchart showing a first control example of the rice cooker shown in FIG. 1;

FIG. 6 is a second flowchart showing a first control example of the rice cooker shown in FIG. 1;

FIG. 7 is a third flowchart showing a first control example of the rice cooker shown in FIG. 1;

FIG. 8 is a fourth flowchart showing a first control example of the rice cooker shown in FIG. 1;

FIG. 9 is a fifth flowchart showing a first control example of the magnetic rice cooker shown in FIG. 1;

FIG. 10 is a first flowchart showing a second control example of the rice cooker shown in FIG. 1;

FIG. 11 is a second flowchart showing a second control example of the rice cooker shown in FIG. 1;

FIG. 12 is a first flowchart showing a third control example of the rice cooker shown in FIG. 1;

13 is a second flowchart showing a third control example of the rice cooker shown in FIG. 1. FIG.

FIG. 14 is a flowchart showing a fourth control example of the rice cooker shown in FIG.

15 is a flowchart showing a fifth control example of the rice cooker shown in FIG. 1.

FIG. 16 is a flowchart showing a sixth control example of the rice cooker shown in FIG. 1;

17 is a first flowchart showing a seventh control example of the rice cooker shown in FIG. 1.

FIG. 18 is a second flowchart showing a seventh control example of the rice cooker shown in FIG.

[Explanation of symbols]

1 is a rice cooker, 2 is an inner pot, 3 is an inner case, 4 is an outer case, 5 is a lid unit, 6 is a space, 7 is a work coil,
8 is a coil stand, 9 is a ferrite core insertion groove, 10 is a leg, 11 is a spacer, 12 is a time shield plate, 13 is a ferrite core, 14 is a thermal fuse holder, 15 is a thermal fuse, 17 is a space, 18 Is a coil spring, 19
Is a cylinder, 20 is a sensor cover, 21 is a screw, 22 is a center sensor, 23 and 24 are thermistors, 25 is a sensor cap, 26 is an edge, 27 is a cover surface, 28 is a magnet, 29 is a reed switch, 30 is Thin portion, 34 is an edge portion, 36 is a control board, 37 is an outer cover, 38 is an inner frame portion,
39 is a lock lever, 40 is a hinge mechanism, 43 is a steam discharge port, 44 is a steam discharge tube, 45 is packing, 46 is a reservation switch, 47 is a heat retention switch, 48 is a reheating switch, 49 is a hour switch, and 50 is a minute switch. Switch, 51 is a rice cooker switch, 52 is a rice cooker switch, 53 is a cancel switch, 54 is a liquid crystal display, 55 is a buzzer, 56 is an operation panel, 57 is a heat sink, 61 is a microcomputer, 62 is
Is a power supply, 64 is a lid heater, 65 is a warming heater, 66 is a choke coil, 67 is a diode bridge, 68 is a step-down transformer, 69 is a rectifier, 70 and 71 are smoothing capacitors, 72 is a resonant capacitor, 73 is a diode, and 74 is a diode. Switching transistors, 75 and 76 are triacs, 77 and 78 are PNP transistors, 79 is a timer setting display, 80 is a reference frequency generation circuit, 91 and 9
2 is a rib, 93 is a shield member, 94 is a sensor holding portion,
Reference numeral 95 denotes a magnet mounting portion, and reference numeral 96 denotes a reed switch mounting portion.

Claims (9)

(57) [Claims] 1. An inner pot for storing rice and water, a heating rice cooker for heating the inner pot to cook rice, a heat retaining means for keeping the cooked rice warm, and a reheating means for reheating the rice during the heat keeping. A rice cooker provided with a heating means, wherein the heat-retaining means has two heat-retaining steps, a high-temperature keeping step and a low-temperature keeping step; And a reheating time setting means for setting the reheating time by the reheating means to be longer when the low-temperature memory is set than when it is not set. 2. An inner pot for storing rice and water, a heating rice cooker for heating and cooking the inner pot, a heat retaining means for keeping the cooked rice warm, and a reheating means for reheating the rice during the heat keeping. A rice cooker provided with a heating means, wherein the heat-retaining means has two heat-retaining steps, a high-temperature keeping step and a low-temperature keeping step, and a temperature detecting means for detecting the temperature of the rice being kept warm; A low-temperature heat-retention memory for storing the temperature of the rice in the case where the temperature corresponds to the low-temperature heat-retention step, and a reheating time by the reheating means, when the low-temperature heat retention memory is set. A rice cooking jar comprising reheating time setting means for setting a longer time than when the rice cooker does not exist. 3. An inner pot for storing rice and water, heating rice cooking means for heating and cooking the inner pot, a heat retaining means for keeping the cooked rice warm, and a reheating means for reheating the rice during the heat keeping. A rice cooker provided with heating means, wherein the heat-retaining means comprises a first heat-retention mode having only a high-temperature heat-retention step and a second heat-retention mode having two heat-retention steps of a high-temperature heat-retention step and a low-temperature heat-retention step. A heat retention mode memory configured to store whether the heat retention mode is the first temperature retention mode or the second temperature retention mode in the heat retention step; and completion of reheating by the reheating unit. A rice cooker comprising: a heat retention mode setting means for setting a heat retention mode after reheating to a heat retention mode before reheating based on the contents of the heat retention mode memory. 4. A rice cooker jar comprising: an inner pot for storing rice and water; a heating rice cooker for heating the inner pot for cooking rice; and a heat retaining means for keeping the cooked rice warm. The heat retaining means is configured to be able to select a first heat retaining mode having only a high temperature retaining step and a second heat retaining mode having two heat retaining steps of a high temperature retaining step and a low temperature retaining step. A heat retention mode memory for storing whether the heat retention mode is the first heat retention mode or the second heat retention mode; and at the end of rice cooking, the heat retention mode before the current rice cooking is based on the content of the heat retention mode memory. Heat retention mode setting means for setting the current heat retention mode to the first heat retention mode when the first heat retention mode is set, and setting the current heat retention mode to the second heat retention mode when the second heat retention mode is set. And having Rice cooker jar characterized by the following. 5. A rice cooker comprising: an inner pot for storing rice and water; a heating rice cooker for heating the inner pot for cooking rice; and a heat retaining means for keeping the cooked rice warm. The heat retaining means is configured to be able to select a first heat retaining mode having only a high temperature retaining step and a second heat retaining mode having two heat retaining steps of a high temperature retaining step and a low temperature retaining step. A heat retention mode memory for storing whether the heat retention mode is the first heat retention mode or the second heat retention mode; and at the start of selection of the heat retention mode, the last heat retention mode is determined based on the contents of the heat retention mode memory. In the case of the first heat retention mode, the current heat retention mode is changed to the first heat retention mode,
A rice cooker comprising: a heat retention mode setting means for setting the current heat retention mode to the second heat retention mode when the heat retention mode is the above. 6. rice and a pot inner housing the water, a heating cooking device for cooking by heating the inner pot, a rice cooker with a heat insulating means for heat insulation of the cooking is rice, the A first heat retaining state in which the heat retaining means has only a high-temperature retaining step.
And two high-temperature preservation processes, a high-temperature preservation process and a low-temperature preservation process.
And the second heat retention mode can be selected.
In addition, a heat retention display means for lighting and displaying that the heat retention means is keeping heat, a heat retention time integrating means for integrating the elapsed time during the heat retention by the heat retention means, and when the heat retention elapsed time exceeds the warning reference time. A warning means for flashing the heat retention display means, and the warning reference time serving as an operation reference of the warning means,
In the second heat retention mode, longer than in the first heat retention mode
And a warning reference time setting means for setting the time . 7. rice and a pot inner housing the water, a heating cooking device for cooking by heating the inner pot, a rice cooker with a heat insulating means for heat insulation of the cooking is rice, the A first heat retaining state in which the heat retaining means has only a high-temperature retaining step.
And two high-temperature preservation processes, a high-temperature preservation process and a low-temperature preservation process.
And the second heat retention mode can be selected.
To, the current time when it exceeds the holding time integrating means for integrating the time elapsed during heat retention by the heat insulating means, the current time display means for lighting display the current time during incubation, the incubated elapsed time warning reference time A warning means for blinking the display means, and the warning reference time as an operation reference of the warning means,
In the second heat retention mode, longer than in the first heat retention mode
And a warning reference time setting means for setting the time . 8. rice and a pot inner housing the water, a heating cooking device for cooking by heating the inner pot, a rice cooker with a heat insulating means for heat insulation of the cooking is rice, the A first heat retaining state in which the heat retaining means has only a high-temperature retaining step.
And two high-temperature preservation processes, a high-temperature preservation process and a low-temperature preservation process.
And the second heat retention mode can be selected.
In addition, a warming time integrating means for integrating the elapsed time during the warming by the warming means, a current time display means for lighting and displaying a current time during the warming, and a switch operation when the switch is operated during the warming. Display switching means for turning on and displaying the elapsed time of heat retention instead of the current time on the current time display means only for a period of time; and when the switch operation is performed in a state where the elapsed time of heat retention exceeds the warning reference time, during the switch operation. Only the warning means for causing the current time display means to display a display irrelevant to the current time and the elapsed time of warming, and the warning reference time serving as an operation reference of the warning means,
In the second heat retention mode, longer than in the first heat retention mode
And a warning reference time setting means for setting the time . 9. A rice cooker comprising: an inner pot for storing rice and water; a heating rice cooker for heating the inner pot for cooking rice; and a heat retaining means for keeping the cooked rice warm. The heat retaining means is configured to be able to select a first heat retaining mode having only a high temperature heat retaining step and a second heat retaining mode having two heat retaining steps of a high temperature retaining step and a low temperature retaining step. The two heat retention modes are alternately selected for each switch operation by operating a single heat retention switch having two display means corresponding to the two heat retention modes, and the heat retention in the heat retention mode is started. Cooking rice jar characterized by the following.