JPH064853Y2 - rice cooker - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial field of application) The present invention has a timekeeping means and operates a clock based on the current time and the set rice cooking reservation time to cook rice at the reserved time. The present invention relates to a rice cooker having a rice cooking reservation function for controlling rice cooking so as to complete or start.

(Prior Art) Generally, a rice cooker capable of making a rice cook reservation includes a rice cook control circuit that completes or starts a rice cook operation at a desired time by using a timing function of a microcomputer. Then, for example, the user presets the cooking time, sets the rice cooking switch by pressing the rice cooking switch, and the rice cooking control circuit subtracts the time required for cooking rice from the reserved cooking time to calculate the rice cooking start time. Then, by starting the rice cooking operation at the calculated rice cooking start time, the rice cooking is completed in accordance with the reserved time and the temperature is automatically shifted to the heat retention.

By the way, the conventional rice-cooking control circuit has a time-keeping circuit for counting the time of 24 hours, and the display panel has a time of 1:00 as shown in FIG.
The present time display unit 4 and the reserved time display unit 5 are arranged to display the numbers 1 to 12:59 with the numeral 1 and the display unit 2 for "AM" and the display unit 3 for "PM". And when the reservation time is set to 12:00 AM, it ends at 11:59 PM
It is structured so that reservation sets can be made within the range of 23 hours and 59 minutes.

(Problems to be Solved by the Invention) In the above-mentioned conventional technology, since a timer circuit for clocking 24 hours is provided and the reservation time can be set within the range of 23 hours 59 minutes, it is possible to It may be necessary to cook rice for a long time.In this case, the rice is soaked in water for 12 hours or more, which deteriorates the quality of the rice and it is not possible to cook delicious rice hygienically. Also had a problem of causing problems. In order to solve such a problem, when a rice cooking reservation is made for 12 hours or more, a "too hot" message is displayed, but the user often does not notice this message. In addition, there are some that do not allow you to make reserved rice for a long time of 12 hours or more, but this calculates the remaining time from the current time to the reserved time and further
It is necessary to perform a process of invalidating the timer set based on the comparison result compared with 12 hours, which causes a problem that the microcomputer program becomes complicated and expensive.

Further, in the above-mentioned conventional technique, the numerical value 1 from 1:00 to 12:59
Since the current time and the reserved time are displayed on the display sections 2 and 3 of “AM” and “PM”, the user can select “A”, for example.
M may be mistakenly recognized as “PM”, and when setting the reserved rice for 2 hours at the current time of 8:00 am, “PM” of the reserved time display section 5 is mistaken as “AM”. If it is recognized, the reserved time will be set to PM 10:00 (see Fig. 5), which will cause the reserved cooked rice to be set in 14 hours for the reserved cooked rice for 2 hours, and the reserved time is AM10: Even at 00, there is a problem that rice is not cooked.

Therefore, an object of the present invention is to provide a rice cooker in which a set of reserved rice cooked within 12 hours can be set by a simple program and the time can be easily confirmed.

[Configuration of Device] (Means for Solving the Problem) The present invention relates to a rice cooker having a rice cooking reservation unit 42, and a clocking unit 37 for clocking 12 hours and a current time for setting the current time within the range of 12 hours. Switches 32, 33, 34 and 12 which are setting means
Reservation time setting means that can set rice cooking reservation time within the range of switches 30, 33, 34, current time display means 24 that displays the current time by numbers, and reservation time display that displays the reservation time by numbers And means 25.

(Operation) With the above configuration, the reservation time can be set while looking at the numerical display, and the time is reserved based on the current time and the set cooking rice reservation time, and the reserved time is within 12 hours. The rice cooking control is performed so that the rice cooking is completed or started.

Embodiment An embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIG. 3, 11 is a main body having an inner case 12, an outer case 13, etc., 14 is a lid, 15 is a container for containing the cooked food contained in the inner case 12, and 16 is the inner case 12. The rice cooking heater 17 is provided on the inner bottom portion of the above, and 17 is a heat retaining heater provided on the outer portion of the inner case 12 and the inner surface of the lid 14. 18 is a container
A cup-shaped heat-sensing portion is provided at the bottom of the inner case 12 so as to elastically press-contact with the outer bottom of 15, and a temperature sensor 19 is enclosed in the inside by a mold member 20 having heat conductivity.

In FIG. 2, reference numeral 21 is an operation panel provided on the outer surface of the container body 11 or the lid 14, and includes a display section 22 and an operation section 23. 24 is a current time display section composed of an LCD from 12:00 to 1
The current time is displayed only within the range of 1:59. twenty five
Is a reserved time display section composed of an LCD and displays the reserved time only by numbers in the range of 12:00 to 11:59. 26,27,28 is L
ED is an indicator for displaying the execution process. 26 is for a reserved process, 27 is for a rice cooking process, and 28 is for a heat retention process. 29
Is a rice cooking switch for executing the rice cooking process or rice cooking reservation, 30 is a rice cooking reservation switch for setting rice cooking reservation, 31 is a cancel switch, 32 is a current time switch for setting the current time, 33 and 34 are rice cooking reservation switch 30 or Current time switch 3
2 is a switch for adjusting the time after the operation, 33 is a forward switch, and 34 is a return switch. The rice cooking reservation switch 30, the forward switch 33 and the return switch 34 constitute a reserved time setting means, and the current time switch 32, the forward switch 33 and the return switch 34 constitute a current time setting means.

In FIG. 1, reference numeral 35 is a control means composed of a microcomputer, which is a CPU 36, a clock circuit 37, a memory 3
8, an input circuit 39, an output circuit 40, etc., and the temperature of the container 15 detected by the temperature sensor 19 is converted into an A / D converter.
41 to the CPU 36 via the input circuit 39 and the signals of the switches 29 to 34 via the input circuit 39 to the CP.
Input to U36. The memory 38 stores various rice cooking programs, reserved times, and the like, and the clock circuit 37 clocks 12 hours. Further, the control means 35 is a rice cooking reservation means for starting rice cooking at a rice cooking start time obtained by subtracting a time required for rice cooking, for example, one hour from the reserved cooking time.
Has 42. The control means 35 outputs the output circuit 40 according to the rice cooking program according to the normal rice cooking or the reserved rice cooking.
The heaters 16 and 17 and the alarm device 44 are controlled via the drive circuit 43, and the reservation time, the current time, etc. set by the operation of the switches 30, 32, 33, 34 are displayed.
It is displayed on the time display section 24, 25 via.

The operation of the present invention constructed as above will be described with reference to the graph of FIG.

On the present time display section 24, the present time by the timing operation of the timing circuit 37 is displayed by numbers in the range of 12:00 to 11:59. Then, for example, when the current time display section 24 is displayed at 8:00 and when the user prepares the cooking time, when the user operates the rice cooking reservation switch 30, the time is displayed on the reservation time display section 25 and the forward switch 33 is operated. Alternatively, a desired cooking time can be set by operating the return switch 34.
This rice cooking reservation time can be set in the range of 7:59, which is the longest time, and 9:01, which is the shortest time, for example, 3:00. In this case, the range from 8:00 to 9:00 is controlled so that the cooked rice starts immediately because the reserved set is within one hour required for cooked rice.

After setting the reservation time in this way, cook rice switch 29
Reservation timer rice cooking starts by pressing. Then, the rice cooking reservation means 42 starts the rice cooking when the present time reaches 2:00, which is the time obtained by subtracting one hour required for rice cooking from the cooked time. First, when the temperature detected by the temperature sensor 19 at the start of rice cooking is higher than a predetermined temperature, for example, 60 ° C., a small amount of rice is set. Then, the rice cooking heater 16 and the heat retention heater 17 are continuously energized at the rice cooking start time. Due to this energization, the amount of rice in the container 15 is detected while the temperature of the container 15 rises from 70 ° C to 80 ° C. This rice amount detection is a container
Time T required for the temperature of 15 to rise from 70 ℃ to 80 ℃
Indexed from. That is, when the amount of rice is small, the time T is short, and when the amount of rice is large, the time T is long. Therefore, for example, when T <70 ″, a small amount is determined, and when T ≧ 70 ″, a large amount is determined. Next, when the temperature of the container 15 reaches 94 ° C., boiling detection is started. This boiling detection is performed by utilizing the fact that when the water in the container 15 starts to boil, the temperature rise of the container 15 is suppressed by the latent heat of vaporization. In other words, when the container 15 reaches 94 ° C, when the amount of rice is small, 60 "elapses, and when it is large, 4'20", the temperature of the container 15 rises by 5 de
The state of g or less is detected, and it is determined that the water in the container 15 has boiled based on this detection. After such boiling detection, 60 "off-60" on for the rice cooking heater 16 and the heat retention heater 17.
Is controlled so that the boiling of water in the container 15 continues stably. The water in the container 15 decreases due to the continuation of such boiling, and when the temperature of the container 15 starts to rise again, the cooking heater 16 and the heat-retaining heater 17 are supplied with 20 ″ off-10 ″ o.
n control, and the container 15
The rice cooking process is completed when the temperature rises and reaches 120 ° C. After this, with a small amount, 1'or more off-20 "on-1 'or more off-10" for the rice cooking heater 16 and the heat retention heater 17.
On-1 'or more and off-10 "on is controlled,
1'or more for rice cooker 16 and warmer heater 17
off-40 "on-1 'or more off-30"on-1' or more off-2
By controlling 0 ″ on, the temperature of the container 15 was kept almost the same as when the water was boiling, and the rice inside was made uneven. In this way, the making process of about 15 minutes was performed and then reserved. The cooked rice is completed at the cooked time, that is, at 3:00, and the completion of cooked rice is informed and the temperature is kept warm via the warming heater 17.

As described above, in the above-described embodiment, the clock circuit 37 clocks 12 hours, and the current time is a 12-hour clock, which is a display of only numbers without the display of "AM" and "PM". Since the maximum time of the reservation setting is 12 hours, which is the longest time of the current time, it is impossible to set the reservation for more than 12 hours, which keeps the rice soaked in water for a long time especially in high temperature such as summer. As a result, it is possible to prevent the quality of rice from deteriorating and the taste of rice from deteriorating, and hygienic rice is cooked. Further, since it is not necessary to display "too hot" or to perform invalidation processing of the reservation, the microcomputer program becomes simple. In addition, since the display of "AM" and "PM" is not required, it is not necessary to check the display of AM and PM for each reservation setting, and rice is not cooked at the rice reservation time generated by erroneously recognizing the time. That problem is also solved. On the other hand, in the above embodiment, since "AM" and "PM" are not displayed, if the user recognizes this as 8:00 AM when the current time is displayed as 8:00 AM, the user can make a reservation for 12 hours or more. It is expected that the reserved time will be set to 10:00 with the intention of PM 10:00. In this case, the rice will be cooked at 10:00 AM. But the desired PM
At 10:00, the rice has already been cooked and kept warm, so the problem of not being cooked at the reserved time as in the conventional erroneous operation is solved. Also, the current time and reserved time are displayed only by numbers, which simplifies the display and is convenient for handling.

The present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention. For example, although the description has been given of the type of setting the cooked-up time as a reservation, the invention can be applied to a type of rice cooker that sets the rice-starting time as a reservation. Further, it can be applied to a rice cooker provided with a backup circuit for supplying power to the microcomputer even when a power failure occurs due to a battery or the like, or capable of storing one or more reserved times. Although the time required for cooking rice has been described as one hour, the required time for cooking rice may be selected in consideration of the cooking time at the time of maximum rice cooking.

[Effects of the Invention] The present invention is provided with a rice cooking reservation means, in which a clocking means for clocking 12 hours, a current time setting means for setting a current time within a range of 12 hours, and a rice cooking reservation within a range of 12 hours By providing a reservation time setting means capable of setting the time, a current time display means for displaying the current time by numbers, and a reservation time display means for displaying the reservation time by numbers,
It is possible to provide a rice cooker that makes it possible to set reserved rice within 12 hours with a simple program and to easily check the time.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 to 4 show an embodiment of the present invention, FIG. 1 is a block diagram, FIG. 2 is a front view of an operation panel, and FIG. 3 is a sectional view of a rice cooker. FIG. 4 is a graph showing a heating pattern for reserved rice cooking, and FIG. 5 is a front view showing a conventional time display unit. 24 …… Current time display (current time setting means) 25 …… Reserved time display (reserved time setting means) 30 …… Rice cooking reservation switch (reserved time setting means) 32 …… Current time switch (current time setting means) 33 …… Forward switch (reserved time setting means) (current time setting means) 34 …… Back switch (reserved time setting means) (current time setting means) 37 …… Timekeeping circuit (timekeeping means) 42 …… Rice cooking reservation means

Claims (1)

[Scope of utility model registration request] 1. A rice cooking reservation means having a clocking means for controlling rice cooking so as to complete or start rice cooking at a reserved time by clocking based on a current time and a set rice cooking reservation time. In a rice cooker, a timekeeping means that measures 12 hours, a current time setting means that sets the current time within the range of 12 hours, a reservation time setting means that can set the rice cooking reservation time within the range of 12 hours, and a number A rice cooker characterized by having a current time display means for displaying the current time according to the above, and a reservation time display means for displaying the reservation time by a numeral.