JPS6335716Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention provides a rice cooker that is equipped with an electric heater in the heating space below the inner pot and a timer device that can arbitrarily set the rice cooking start time. Regarding.

[Technical background of the invention and its problems] Conventionally, in this type of rice cooker, an electric heater is disposed in a heating space below the inner pot with a predetermined gap from the inner pot. Rice was cooked by heating the inner pot using an electric heater. However, since electric heaters generate less heat than heat sources such as gas, there is a problem in that it takes a long time from the start to the completion of rice cooking.

On the other hand, when cooking rice, a large amount of heat is required in the initial stage of cooking until the temperature in the inner pot reaches a predetermined temperature (for example, 100℃), and the time required for this initial stage determines the length or shortness of the total rice cooking time. It becomes a factor that affects
It is known that in the later stages of cooking rice, it is sufficient to supplement the amount of heat released.

Therefore, if you simply increase the calorific value (power consumption) of the electric heater in order to shorten the rice cooking time, the surface temperature of the electric heater will rise, and the temperature of the bottom of the pot near the electric heater will locally rise. A new problem arises in that some parts of the rice burn. In addition, in order to improve the above-mentioned drawbacks, two electric heaters were installed.
With this arrangement, rice is cooked using two electric heaters in the initial stage of cooking, and only one electric heater is used from the time it boils until the rice is finished, reducing the cooking time and eliminating scorched rice. Recently, rice cookers have been considered, but they are extremely unreasonable in cases where there is no need to consider shortening the rice cooking time.

[Purpose of the invention] The present invention was made in consideration of the above circumstances, and in a device equipped with a timer device and two electric heaters, a rice cooking method using a combination of two electric heaters and a timer device are combined. You can arbitrarily select the rice cooking method using only the first electric heater,
The purpose of the present invention is to provide a rice cooker that is highly energy-saving.

[Summary of the invention] In order to achieve the above-mentioned object, the present invention provides a heating space provided between the inner pot and the inner frame with a predetermined gap between the inner pot and the inner frame. An electric heater is provided, the first and second electric heaters are simultaneously energized at the beginning of rice cooking, and when the inner pot reaches a predetermined temperature, the second electric heater is turned off by a temperature detection device,
There is a rice cooking method in which only the first electric heater is then energized, and a rice cooking method in which rice is cooked by continuously energizing only the first electric heater using a timer device that is provided so that the rice cooking start time can be arbitrarily set. It is characterized by being able to select.

[Embodiment of the invention] An embodiment of the invention will be described below with reference to the drawings. Reference numeral 1 denotes an outer frame, a bottom frame 2 is attached to the lower end thereof, and an opening on the upper surface is closed by a lid 3 so as to be openable and closable. 4 is a container-shaped inner frame housed in the outer frame 1;
5 is an inner pot stored in the inner frame 4, and the inner pot 5 and the inner frame 4
A substantially sealed space 6 for heating is formed between the two. Reference numeral 7 denotes a well-known heat-sensing device for detecting cooked rice that uses a magnetic shunt steel 8 as a heat-sensing body. The heat cap 9 includes a heat transfer cap 9 and a support plate 1 attached to the bottom wall of the inner frame 4.
0, and penetrates through an opening 4a formed in the bottom wall of the inner frame 4 and comes into close contact with the outer bottom wall of the inner pot 5. . On the other hand, the magnet portion 12 of the heat sensitive device 7 is supported within the heat transfer cap 9 so as to be movable up and down, and is urged downward by a spring 13. Reference numeral 14 denotes an operating rod rotatably supported on the bottom frame 2, one end of which is connected to the lower end of the magnet part 12, and the other end penetrates the bottom frame 2 and projects outward. A knob 15 is attached to the protruding portion. Reference numeral 16 denotes a rice cooking switch operated by the operating rod 14, which is closed when the knob 15 is set downward, and the heat sensitive device 7
When the operation lever 14 returns to its original position, it is opened. 17
is a thermostat as a temperature detection device placed in the heat transfer cap 9 together with the magnetic shunt steel 8, and this thermostat 17 has an outer bottom wall of the inner pot 5 of approximately 100 mm.
The contact piece is designed to open when the temperature reaches ℃. 18 is a first electric heater located in the space 6 and supported by the inner frame 4 with a predetermined gap between it and the inner pot 5; 19 is an electric heater located outside the first electric heater 18; The second electric heater is also supported by the inner frame 4 with a predetermined gap between it and the inner pot 5. The amount of heat generated by the first electric heater 18 is equal to the amount of heat generated by the first electric heater 18.
The calorific value of the electric heater 19 is set to be larger than that of the electric heater 19.

Now, reference numeral 20 denotes a timer device that can arbitrarily set the rice cooking start time, and the user can set the desired rice cooking start time by operating the operation knob 20a of the timer device 20. This timer device 20 has a contact 20b that turns off when the rice cooking start time is set and turns on after the set time has elapsed, and a contact 20c that continues to turn off when the rice cooking start time is set.

In addition, in FIG. 3 showing the electrical configuration, the first
The electric heater 18 is connected to the power plug 21 via the rice cooking switch 16 and the contact 20b of the timer device.
It is connected to the. The second electric heater 19 is connected in series with the thermostat 17 and the contact 20c, and this series circuit is connected in parallel with the first electric heater 18. Note that 22 is a rice cooking lamp, 23 is a resistor, and this series circuit is connected in parallel to the first electric heater 18.

Note that 24 is a decorative panel.

Next, the operation of the above configuration will be explained. Rice and water are put into an inner pot 5, the inner pot 5 is stored in an inner frame 4, and a lid 3 is closed. When normal rice cooking is selected with the operation knob 20a, the contacts 20b and 20c are turned on, respectively, and when the knob 15 is pushed downward, the operation rod 14 rotates and the magnet part 12 rises, and the magnet part 12 is made of magnetic shunt steel. 8, the operating rod 14 is set, and the rice cooking switch 16 is closed. Then, the first electric heater 1
8 and the second electric heater 19 are energized at the same time, the rice and water in the inner pot 5 are transferred to the first electric heater 18.
and the second electric heater 19. The rice and water in the inner pot 5 are heated and the temperature rises, and the temperature of the outer bottom wall of the inner pot 5 is, for example, about 100℃.
℃, the thermostat 17 is activated and opened, the second electric heater 19 is cut off, and then only the first electric heater 18 is energized. Then, the first electric heater 18 further heats the pot 5 for a predetermined period of time, and the temperature of the bottom wall of the inner pot 5 rises rapidly.
The magnetic shunt steel 8 of the heat sensitive device 7 loses its magnetism, and the magnet part 12
is urged downward by the elastic force of the spring 13, the operating rod 14 returns and the rice cooking switch 16 is opened.

Next, after setting the operation knob 20a to the desired rice cooking start time, push the knob 15 downward to close the rice cooking switch 16, and the contact 20a in FIG.
Since both b and 20c are off, rice cooking does not start. Eventually, time passes and when the set time comes, the contact 20c remains open and the contact 20b closes to start cooking rice. In other words, only the first electric heater 18 is energized, and the first electric heater 18
When the pot 5 is heated within a predetermined time by
The temperature of the bottom wall rises rapidly, and after a period of time until rice cooking is complete, conventional rice cooking is completed.

According to the above embodiment, the following effects can be obtained. In other words, in normal rice cooking, the inner pot 5 at the initial stage of rice cooking
When the rice and water in the pot are close to room temperature, the first electric heater 18 and the second electric heater 19 are energized at the same time and are heated by both, so that the water in the inner pot 5 is brought to the boiling point in a short time. The temperature can be raised and the cooking time can be shortened.

In addition, in timer rice cooking, since it is not necessary to cook rice in a short time, only the first electric heater is used to cook rice, so the power consumption is even lower than when using two electric heaters in combination. It also has the effect of preventing burns because it does not emit extremely high temperatures.

[Effects of the invention] As described above, the present invention provides a space for heating between the inner pot and the inner frame, and provides a predetermined gap from the inner pot within this space, so that the first and second A second electric heater is installed, and during normal rice cooking, the first electric heater is
Since heating is performed only with an electric heater,
This has the practical effect of shortening the rice cooking time, reducing power consumption, and further reducing power consumption because rice is cooked only by the first electric heater during timer rice cooking.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is a partially cut away longitudinal sectional view, Fig. 2 is an enlarged longitudinal sectional view of the main part, Fig. 3 is a circuit diagram, and Fig. 4. shows a partially enlarged view. In the figure, 4 is the inner frame, 5 is the inner pot, 6 is the space, 17
is the thermostat (temperature detection device), 18 is the first
19 is a second electric heater, 20 is a timer device, and 20b and 20c are contacts.

Claims (1)

[Scope of utility model registration request] In the heating space provided between the inner pot and the inner frame, first and second electric heaters are disposed with a predetermined gap from the inner pot, respectively, and the rice cooking start time can be arbitrarily set. In addition, the first and second electric heaters are simultaneously energized at the beginning of rice cooking, and when the inner pot reaches a predetermined temperature, the second electric heater is turned off by a temperature detection device, and then the first electric heater is turned off. A rice cooker characterized by switching between a rice cooking method in which only the heater is energized and a rice cooking method in which only the first electric heater is continuously energized by the timer device.