JPS63102717A - Rice cooker - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

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,
In the cooking process, even if the rice is heated at the specified heat power, the cooking end temperature is not reached within the specified time (hereinafter, this condition is referred to as boiling rice).If the rice continues to be cooked in this state, the heating This will cause the temperature of each part of the rice cooker to rise.
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 the one used in the cooking process, and when the cooking end temperature is reached, the next cooking process is started. Ta.

Problems to be solved by the invention In such conventional rice cookers, it is determined that the rice is cooked in hot water,
When cooking rice by lowering the heating power, there is a problem that if the cooking end temperature is not reached for a long time, heat will accumulate inside the rice cooker, causing the temperature around the control circuit etc. to exceed an 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, one 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 timer for measuring the cooking time. 3 is a determining means for determining that a predetermined time and temperature are reached from the output of the clocking means 2 and the output of the temperature detecting means 1; 6 is a determining means for determining a first predetermined time based on the output of the determining means 3; If the rice cooking end temperature is not reached even after a predetermined time has elapsed, the heating means 4 is controlled to reduce the heating power to the first one and the rice is cooked, and if the rice cooking end temperature is not reached even after a predetermined time has elapsed, the heating means 4 is further heated to the second heating power. 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 cooking container, and 11 is the temperature sensor 1 An A/D converter that A/D converts the output of
2 is an input section for inputting the output of the converter 11; 13;
14 is a storage section that stores heater control data based on temperature data and time data; 14 is a control section that outputs a control signal based on the outputs of the input section 12 and storage section 13; 15;
Reference numeral 17 indicates an output section that outputs an output signal according to the control signal of the control section 14, 17 indicates a relay drive section that drives the relay 18 based on the output signal of the output section 16, and 19 indicates the output of the rice cooker when the relay 18 is closed. A heater for heating the pot, 16, is connected to the input section 12. Storage section 13, control section 14. It is a microcomputer equipped with an output section 16.

Next, the operation of the rice cooker of the present invention will be explained. FIG. 3 shows the main part of a flowchart controlled by the microcomputer 1e. First, in step 2o, the rice cooking heat is set. In step 21, input from the temperature sensor 10 is performed. Check whether the internal timer has overflowed with the step difference, and if it has not overflowed, Stella.

At step 23, it is checked whether the rice cooking end temperature has been reached. If the rice cooking end temperature has not been reached, the process returns to step 21, and steps 21 to 23 are repeated. If it has been reached, the process moves to the next step in step 29. Also, if the internal timer has overflowed in step 22, it is checked in step 24 whether it is the first overflow, and if it is the first time, in step 26 the heat is lowered to boiling water, and the timer is set in step 26. Re-enter the initial value, then return to step 21, and repeat steps 21 to 23. If the timer overflows for the second time or more in step 24, the firepower is further reduced in 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 the drawing]

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 the microcomputer in the rice cooker. 1... Temperature detection means, 2... Timing means, 3... Discrimination means, 4... Heating means,
6... Control means, 16... Microcomputer. Name of agent: Patent attorney Toshio Nakao and one other name
1 Figure 2

Claims (1)

[Claims] A temperature detection means for detecting the temperature inside the pot of the rice cooker, a timer for measuring the cooking time, and a determination for determining that the time and temperature are at a predetermined time based on the output of the timer and the output of the temperature detection means. If the rice cooking end temperature is not reached even after the first predetermined time has elapsed according to the output of the determination means, the heating means is controlled to reduce the heating power to the first heat power and the rice is cooked, and then the second predetermined temperature is increased. A rice cooker comprising a control means for controlling the rice to be further lowered to a second heating power when the rice cooking end temperature is not reached even after a certain period of time has elapsed.