JPH0552731B2 - - Google Patents

Description

[Detailed description of the invention] Industrial applications The present invention relates to a rice cooker.

Conventional technology In conventional rice cookers, if foreign objects get into the heater or temperature sensor, or if there is an abnormally large amount of water in the pot, the rice cooker may not be able to cook rice within a specified time even if it is heated at a specified heating power during the cooking process. When the rice does not reach the cooking end temperature (hereinafter, this condition is referred to as boiling rice).
There is. If you continue to cook rice in this state, the temperature of each part of the rice cooker will rise due to heating, so reduce the heat a little and cook the rice. In order to improve the quality of the rice at the end of cooking, rice is generally cooked at a slightly lower heat power than that of the cooking process, and when the cooking end temperature is reached, the process proceeds to the next cooking process. Ta.

Problems to be Solved by the Invention In such a conventional rice cooker, if the rice is determined to be cooked in hot water and the rice is cooked by lowering the heat, heat will build up inside the rice cooker if the cooking end temperature is not reached for a long time. There was a problem in that the temperature around the control circuit etc. exceeded the allowable value.

An object of the present invention is to provide a rice cooker that solves these problems.

Means for Solving the Problems In order to solve the above problems, the present invention provides a temperature detection means for detecting the temperature inside the pot of a rice cooker, a timer means for measuring the cooking time, and an output of the timer. a determining means for determining that the temperature has reached a predetermined time and temperature based on the output from the temperature detecting means; and a heating means for determining if the rice cooking end temperature is not reached even after a first predetermined time according to the output of the determining means. Controllably reduce the heat to the first heat and cook the rice, then reduce the heat to the second heat.
If the rice cooking end temperature is not reached even after a predetermined period of time has elapsed, the heating power is further lowered to a second level and the rice is cooked.

Function The rice cooker of the present invention has the above-described configuration, so that if the rice cooking end temperature is not reached even after a predetermined time has passed after starting rice cooking, the rice cooker lowers the heat and cooks the rice, and then after a predetermined time has passed, the rice cooker lowers the heat and cooks the rice. If the rice cooking end temperature has not been reached, the heating power is further reduced and the rice is cooked, thereby making it possible to reduce the temperature rise inside the rice cooker.

Embodiment Hereinafter, an embodiment of the present invention will be described based on the accompanying drawings. FIG. 1 shows a block diagram of a rice cooker according to an embodiment of the present invention. In FIG. 1, 1 is a temperature detection means for detecting the temperature inside the pot inside the rice cooker, and 2 is a device for measuring the cooking time. timekeeping means,
3 is the output of the time measuring means 2 and the temperature detecting means 1.
A determining means 5 determines from the output of the determining means 3 that the temperature is a predetermined time and temperature, and a determining means 5 controls the heating means 4 if the rice cooking end temperature is not reached even after the first predetermined time according to the output of the determining means 3. Then lower the heat to the first heat and start cooking. If the rice does not reach the cooking end temperature even after the specified time, then turn the heat to the second heat.
This is a control means for controlling the rice to be cooked by lowering the heat power to .

FIG. 2 shows a specific circuit diagram of a rice cooker according to an embodiment of the present invention. In FIG. 2, 10 is a temperature sensor that detects the temperature inside the rice cooker, and 11 is the temperature sensor 10. A/D output of
An A/D converter for conversion; 12 an input section for inputting the output of the A/D converter 11; 13 a storage section storing heater control data based on temperature data and time data; 14 an input section 12; and a control section that outputs a control signal based on the output of the storage section 13; 15 an output section that outputs an output signal based on the control signal of the control section 14; and 17 a relay drive that drives the relay 18 using the output signal of the output section 15. 19 is a heater that heats the pot of the rice cooker when the relay 18 is closed, and 16 is a microcomputer including the input section 12, the storage section 13, the control section 14, and the output section 15.

Next, the operation of the rice cooker of the present invention will be explained. FIG. 3 shows the main parts of the flowchart under the control of the microcomputer 16.
Set the cooking heat at 20. In step 21, input from the temperature sensor 10 is performed. Check whether the internal timer has overflowed in step 22, and if it has not overflowed, proceed to step 22.
Check whether the rice cooking end temperature has been reached in step 23, and if it has not reached it, return to step 21 and repeat steps 21 to 23. If it has been reached, proceed to the next step in step 29. Also step 22
If the internal timer has overflowed, step 24 checks to see if it is the first overflow. If it is the first time, step 25 lowers the heat to boiling water, and step 26 sets the timer to the initial value. Re-insert, and return to step 21.
Repeat steps 21 to 23. step
If it is the second or more timer overflow at step 24, the firepower is further reduced at step 27 and the process returns to step 21, where steps 21 to 23 are repeated.

Effects of the Invention As described above, according to the present invention, it is possible to reduce the temperature rise inside the rice cooker even if the rice cooking end temperature is not reached for a long time after starting rice cooking.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a rice cooker showing an embodiment of the present invention, FIG. 2 is a specific circuit diagram of the rice cooker, and FIG. 3 is a flowchart of a microcomputer in the rice cooker. 1...Temperature detection means, 2...Time measurement means, 3...
Discrimination means, 4... Heating means, 5... Control means, 1
6...Microcomputer.

Claims (1)

[Claims] 1. A temperature detecting means for detecting the temperature inside the pot of the rice cooker, a time measuring means for measuring the cooking time, and determining whether the predetermined time and temperature are reached from the output of this time measuring means and the output of the temperature detecting means. a determining means, and if the rice cooking end temperature is not reached even after a first predetermined time according to the output of the determining means, the heating means is controlled to lower the heating power to the first heating power and the rice is cooked;
The rice cooker is further equipped with a control means for controlling the rice to be cooked by further lowering the heating power to a second level if the rice cooking end temperature is not reached even after a second predetermined time has elapsed.