JPS5920811Y2 - electric rice cooker - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improved configuration of an electric rice cooker, and particularly provides an electric rice cooker with a simple configuration that performs forced steaming after rice cooking is completed.

An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes an electric rice cooker, which includes a bottomed cylindrical frame 2 with openings on two sides, a pot 3 fixed or removably arranged in the frame 2, and an iron pot. An outer frame is constituted by a lid body 4 that covers the upper opening of 3.

Reference numeral 5 denotes a hot plate-type rice cooking heater, and a main rice cooker 1-6 is arranged in a through hole 5' formed approximately in the center of the rice cooker so as to be able to appear and retract at will so as to sense the temperature at the bottom of the pot 3. There is.

Reference numeral 7 denotes an auxiliary heater which is arranged in parallel with the rice cooking heater 5 and has an auxiliary thermostat 8 fixed to its bottom.

Next, to explain the electric circuit diagram, the commercial AC power supply 9 has a timer switch 10 and the rice cooking heater 5 connected in series with it.
and the main thermostat 6 are connected.

The main thermostat 6 is set so that the temperature at the bottom of the pot 3 is approximately 1
The temperature is set so that the circuit opens when the temperature reaches 40°C, and the circuit closes when the temperature drops to about 110°C.

A series circuit of the auxiliary heater 7 and a normally closed auxiliary thermostat 8 having a lower set temperature than the main thermostat 1-6 is connected in parallel with the rice-cooking heater 5.

The auxiliary thermostat 8 has a temperature of about 1
The circuit is set to open when it senses that the temperature has reached 00°C.

Moreover, the rice cooking heater 5 is installed in parallel with the main thermostat 6.
A timer motor 11 having a sufficiently higher impedance than the auxiliary heater 7 is connected.

This timer motor 11 accumulates time when energized,
After approximately 15 minutes of integration, the timer switch 1 is activated.
0 is opened.

Next, the operation will be described. The timer switch 10, the auxiliary thermostat 8, and the main thermostat 6 are closed, and the rice cooking heater 5 and the auxiliary heater 7 are energized.

The rice cooking heater 5 and the auxiliary heater 7 heat the bottom of the pot 3, so that the initial temperature is rapidly raised.

When the bottom temperature A of the pot 3 first reaches 100°C, the normally closed auxiliary thermostat 8 opens, and then the rice cooker heater 5 heats the previous record 3 and the bottom temperature A rises to 140°C. Mostatu l-6 is opened and the rice temperature port in the pot 3 reaches about 100°C, and the rice cooking is completed.

Here, when the main thermostat 6 is opened, the timer motor 11 operates through the rice-cooking heater 5 and integrates the time, and since the impedance of the timer motor 11 is larger than that of the rice-cooking heater 5, the amount of heat generated by the rice-cooking heater 5 increases. becomes insignificant.

As mentioned above, when the main thermostat 6 continues to be in the open state, the pot bottom temperature A gradually decreases from about 140°C, but at this time the rice temperature port is still 100°C.
, and so-called steaming will be carried out from now on.

When the bottom temperature of the pot falls to about 110° C., the main thermostat 6 senses this temperature drop and closes the circuit again, stopping the integration of the timer motor 11 and starting energizing the rice cooking heater 5. The pot bottom temperature A is raised, and the main thermostat 6 is opened and closed to intermittently energize the rice cooking heater 5, and the timer motor 11 is integrated to forcibly steam and cook the rice to continue.

When the timer motor 11 accumulates the time suitable for forced steaming, that is, the preset approximately 15 minutes, all operations that do not open the timer switch 10 are completed.

As described above, the present invention connects a timer switch, a rice-cooking heater, and a main thermostat in series to a power supply, and connects a series circuit of an auxiliary heater and an auxiliary thermostat whose set temperature is lower than that of the main thermostat in parallel with the rice-cooking heater. At the same time, since a timer motor for controlling the opening and closing of the timer switch is connected in parallel with the main thermostat, the rice is cooked quickly and the rice is steamed reliably after completion of cooking, making it possible to provide delicious rice. can.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of the main parts of the electric rice cooker of the present invention, FIG. 2 is an electric circuit diagram, and FIG. 3 is a diagram of changes in the temperature at the bottom of the pot and the temperature of rice over time. 5...Rice cooking heater, 6...Main thermostat, 8...Auxiliary thermostat, 11...
...Timer motor.

Claims (1)

[Scope of utility model registration request] A timer switch, a rice-cooking heater, and a main thermostat that opens at the rice-cooking end temperature and closes at the optimum temperature for steaming are connected in series to the power supply, and an auxiliary heater is connected in parallel with the rice-cooking heater and an auxiliary thermostat that opens at a temperature lower than the main thermostat. An electric rice cooker characterized in that a series circuit with a thermostat is connected, and a timer motor is connected in parallel with the main thermostat and opens the timer switch after integrating a predetermined steaming time.