JPH0572203B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a rice cooker used in general households.

Conventional technology As a conventional example, the utility model application was published in 1972-53342.
There is something shown in This conventional example will be explained below based on the drawings. FIG. 4 is a partial sectional view of this conventional rice cooker. In the figure, 1
The main body is formed in the shape of a box with an open top, and a heat insulating material 3 is attached to the inner surface of an outer frame 2, and an outer hook 4 is inserted into the main body. The outer pot 4 is equipped with an annular rice cooking heater 5 and a thermostat 6 that are activated when rice cooking is completed at the bottom, a first heat retention heater 7 made of a plate shape at the bottom, and a second heat retention heater 8 on the circumferential side. It is installed. An inner pot 10 is attached to the outer pot 4 so as to be freely removable. The inner pot 10 is formed into a tank shape like the outer pot 4, and is inserted into the bottom of the outer pot 4 in close contact with a predetermined amount of rice and water during rice cooking.

Reference numeral 11 in the figure is a lid body, into which a heat insulating material 12 made of the same material as the above-mentioned heat insulating material 3 is inserted, and a third thermistor made of a positive temperature coefficient thermistor is inserted on the inner surface.
A heat-retaining heater 13 is installed.

In the above conventional example, during rice cooking, the rice cooking heater 5 and the heat retention heaters 7, 8, 13 are all energized,
The rice is cooked by heating the whole thing.

Problems to be Solved by the Invention Incidentally, it has been known for a long time that rice cooking performance is improved by cooking rice by heating the entire surface. However, as in the conventional example, when the entire surface is heated using heat-retaining power, the amount of heating is too small to achieve sufficient heating, and the improvement in rice cooking performance is not sufficient.
Also, even after additional cooking, the food was not heated enough.

Means for Solving the Problem In order to solve this problem, the present invention provides a pot for storing rice to be boiled, a rice cooking heater located at the bottom of the pot, and an openable pot for sealing the opening surface of the pot. At least 1/10 of the rice cooking heater, which has a lid, has a heat radiation surface at the lowest part of the lid, and is in close contact with the heat radiation surface.
A heating element having the above electric power, a heat insulating member installed above the heating element, a heat radiating surface coated with fluorine or fluorine-containing ceramic, and electricity is applied to the heating element during rice cooking.

Function: With this configuration, the heat from the heating element on the lid can be efficiently transferred from the heat radiation surface to the heating space of the rice cooker, allowing for sufficient overall heating and increasing the boiling retention time to cook delicious rice. It is something that can be done. Furthermore, by applying electricity to the heating element of the lid during the cooking process, the additional cooking effect can be enhanced and the baking process can be realized. Also, cleaning becomes easier by processing the heat radiating surface with a slat or coating it with slat-containing ceramic.

Embodiment Hereinafter, an embodiment of the present invention will be described based on the drawings.

In FIG. 1, reference numeral 20 denotes a main body formed in a cylindrical shape with an open top, and an upper frame 21 is fitted into the opening of the main body 20.

A protective frame 22 is fixed within the main body 20 by an upper frame 21. A heat insulating material 2 made of an inorganic material such as glass wool is provided in the space between the main body 20 and the protective frame 22.
I am wearing 3. A rice cooking heater 24 such as a cast heater is fixed to the inner bottom of the protection frame 22. Furthermore, a center thermometer 25 is provided at the center of the inner bottom of the protective frame 22 to detect the end of rice cooking and the temperature to keep the rice warm. It is detachable.

A heat-retaining heater 27 made of wire is attached to the side periphery of the protective frame 22. A lid 28 is provided on the upper frame 21, and specifically attached to a clamp mechanism by a shaft 30. A heat insulating material 31 is housed within the lid 28 . A heat radiation surface member 32 is fixed to the lowermost surface of the lid 28. A heat insulating material 31 in the lid 28 and a heat radiation surface member 3
A lid heater 33 made of a planar heating element such as a private car heater is fixed between the lid heaters 2 and 2. Note that the lid heater 33 has at least 1/10 or more power of the rice cooking heater 24.

34 in the figure is a heating space, which is a space surrounded by the protection frame 22 and the heat radiation surface member 32. 35 is a steam cylinder.

FIG. 2 shows the main circuit of the embodiment. In the figure, 36 is a rice cooking switch, which may be a relay or the like to operate under the control of a microcomputer or the like (not shown). Reference numeral 37 denotes a heat retaining switch, which is turned on and off by a microcomputer or the like according to the temperature of the center thermostat 25, and may be a triax, a relay, or the like. 38 indicates an AC power source.

FIG. 3 shows the temperature of each part when confirmed in the experiment of the example. In the figure, 39 indicates the temperature of the bottom of the pot, 40 indicates the temperature of the atmosphere inside the pot, 41 indicates the temperature of the food to be cooked, and 42 indicates the sum of the electric power of the rice cooking heater 24 and the electric power of the lid heater 33. In addition, the power of the lid heater and rice cooking heater in this example is the same as that of the lid heater.
200W, rice cooking heater 600W.

The rice cooking method of the above embodiment will be explained. First, water and rice (hereinafter referred to as food to be cooked) are put into the pot 26, and the pot is placed in a predetermined position in the heating space 34.The lid 28 is then closed and the rice cooking switch 36 is turned on. The heater 33 is energized and generates heat. In this way, the rice is cooked using the same principle as before. In this way, when the water at the bottom of the pot runs out, the bottom temperature 39 of the pot starts to rise. When the bottom temperature 39 of the pot reaches 130℃, turn off the rice cooking switch 36. After a predetermined period of time has elapsed, the rice cooking switch 36 is turned on for a certain period of time to perform additional cooking. After a predetermined period of time has elapsed, the rice cooking is completed.

The operation of the above embodiment will be explained in more detail. When the food is put in and cooking starts, the ambient temperature 40 becomes higher than the temperature 41 of the food due to the effect of the lid heater 33, and the temperature of the food is raised quickly. When the food boils and steam begins to come out, the ambient temperature 40 drops to 100°C, so only the bottom heater 24 heats the food from the lid heater 33, so the heating to the food is automatically turned off. This is the same as boiling down the boiling water, and therefore the boiling time for the cooked food becomes longer, making it possible to cook sweet and delicious rice. Furthermore, even at low temperatures, the atmosphere can be maintained at 100°C by the lid heater 33, allowing for good rice cooking.

In addition, by energizing the rice cooking switch 36 for a short period of time during steaming, the water adhering to the rice grains can be evaporated and the atmospheric temperature 40 can be raised to 100°C or higher. You can cook delicious rice.

Effects of the Invention As described above, the present invention has a rice cooking heater located at the bottom of a pot, a lid that can be opened and closed to seal the opening surface of the pot, and a heat radiation surface member attached to the lowest part of the lid. A heating element with a power of at least 1/10 or more than that of a rice-cooking heater is installed in close contact with the heat radiation, a heat insulating member is installed on the upper layer thereof, and the heat radiation surface is coated with a fluorine coating or a ceramic containing fluorine. As a result, during rice cooking, both the lid heater and the rice cooker heater raise the temperature uniformly and quickly until the food boils, and after boiling, the power of the lid heater is automatically turned down due to the steam coming out from the food. Since the boiling time of the cooked food is extended, the decomposition of amylase progresses, making it possible to cook sweet and delicious rice. In addition, by energizing the heater during steaming, the baking process can be realized, making it possible to cook delicious, glossy rice. Furthermore, by coating the heat radiating surface member with a sluice or a ceramic coat containing sluice, cleaning becomes easier.

Note that when the power of the lid heater is low, the temperature of the heating space cannot be raised and there is no effect.

[Brief explanation of drawings]

1 to 3 show an embodiment of the present invention, in which FIG. 1 is a partially cutaway side view, FIG. 2 is an electric circuit diagram, and FIG. 3 is a temperature rise diagram. FIG. 4 is a partially cutaway sectional side view of a conventional example. 24...Rice cooking heater, 26...Pot, 28...
Lid, 33...Lid heater, 31...Insulating material.

Claims (1)

[Claims] 1 It has a pot that stores rice to be boiled, a rice cooking heater located at the bottom of the pot, and an openable lid that seals the opening surface of the pot, and forms a heating space surrounded by the pot and the lid. At the same time, a heat radiating surface member is provided on the surface of the lid facing the heating space, and at least 1/10 of the rice cooking heater is provided in close contact with the heat radiating surface member.
A rice cooker in which a heating element having a power of more than 100% is installed, a heat insulating member is installed on the upper layer thereof, the heat radiating member is coated with fluorine or a fluorine-containing ceramic coat, and the heating element is energized during rice cooking. .