JP2844014B2 - rice cooker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention is to cook rice from the lid during cooking to heat the rice uniformly and to adjust the amount of heating after boiling to provide delicious rice. It is about a vessel.

2. Description of the Related Art A conventional rice cooker has a technology in which a temperature sensor for detecting the temperature of a lid is provided on a lid, and boiling is detected by utilizing the fact that the temperature of the lid rises due to boiling. By controlling the energization of the rice cooker provided on the main unit by detecting boiling,
The control that is equivalent to the one that has been used for a long time, such as “Starting a chorochoro nakadashi…”, “Turn on a slick fire” is performed. On the other hand, there is a technology in which a lid heater is provided on the lid, and the rice is heated from the lid so that the rice is quickly heated without unevenness. (For example, Japanese Utility Model Laid-Open No. 62-100126) Problems to be Solved by the Invention Both of the above techniques are techniques for cooking rice deliciously, and if both are carried out simultaneously, a very delicious rice can be obtained. However, when the lid is heated, the temperature of the temperature sensor provided on the lid rises, and boiling is erroneously detected. Therefore, it is impossible to perform both of them at the same time.

Therefore, if the lid is equipped with only a temperature sensor, the temperature rise of the lid will be low, and the lid will be easily exposed to dew after boiling,
In the case where only the lid heater is provided on the lid, the temperature of the lid rises quickly but has a disadvantage that the temperature becomes too high and the heat radiation from the lid increases.

Means for Solving the Problems The present invention has been made to solve the above problems, and a rice cooker main body is provided with a rice cooker and a power supply control means for controlling the power supply to cover an upper opening of the main body. The lid was provided with a lid heater and a temperature sensor for detecting the temperature. Further, temperature control means for controlling the energization of the lid heater so that the temperature detected by the temperature sensor becomes the set temperature, and the output temperature of the temperature sensor reaches a temperature higher than the set temperature of the temperature control means due to steam generated during rice cooking. The body is provided with a boiling detecting means for judging boiling when the boiling point is detected. Immediately after the detection of the boiling or after a certain period of time, the heating amount of the rice cooker is adjusted by the power supply controlling means.

Operation In the configuration of the present invention described above, when rice cooking is started, the lid heater is energized until the temperature detected by the temperature sensor reaches the set temperature of the temperature control means, and the energization is stopped when the temperature exceeds the set temperature. When the temperature falls below the set temperature, power is supplied again. Thereafter, by repeating this operation, the temperature is adjusted so that the temperature of the temperature sensor becomes the set temperature. That is, since the temperature sensor is provided on the lid, the temperature of the lid becomes the set temperature, and rice (water) can be heated from the lid by the lid heater. At the same time as the start of rice cooking, the heater for rice cooking is also energized by the operation of the power supply control means. When the rice and water are heated and boiled by the heating of the rice cooker and lid heater, the lid is heated by the steam, so even if the temperature control means stops energizing the lid heater, it cannot be controlled at the set temperature and the temperature of the temperature sensor Reaches a temperature (T) higher than the set temperature, the boiling detection means detects boiling.

1) In claim 1, when the boiling is detected, the heating amount of the rice cooking heater is adjusted by the current supply control means immediately.

2) In claim 2, the heating amount of the rice cooker is adjusted by the power supply control means after a certain period of time from the detection of boiling.

With the above configuration, while heating from the lid,
The amount of heating of the rice cooking heater can be controlled by detecting the boiling.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of a rice cooker according to the present invention, FIG. 2 is a diagram showing a heater circuit configuration of the rice cooker, and FIG. 3 is an example showing the temperature characteristics of the lid of the present invention and the state of energization to the lid heater. 1 in the figure
Is a body, 2 is a rice cooking heater, 3 is an inner pot, 4 is a lid, 5
Is a lid heater, 6 is a temperature sensor, 7 is energization control means, 8 is temperature control means, and 9 is boiling detection means.

In this configuration, a rice cooker 2 is mounted inside a main body 1, and an inner pot 3 is originally housed in a detachable manner. A lid 4 is attached to the main body 1, and a lid heater 5 and a temperature sensor 6 are attached inside the lid 4. Inside the main body 1, there are provided a power supply control means 7, a temperature control means 8 and a boiling detection means 9 which are controlled by a control unit. The power supply control means 7 includes a rice cooker 2, and the temperature control means 8 includes The lid heater 5 and the temperature sensor 6 are connected.

Hereinafter, the operation of the present embodiment having the above configuration will be described. The user puts rice and water into the inner pot 3, stores it in the main body 1 and closes the lid 4. Next, when a rice cooker switch (not shown) is pressed, energization of the rice cooker 2 is started by the operation of the electricity supply control means 7. At the same time, temperature adjustment is started by the operation of the temperature adjustment means 8 so that the output temperature of the temperature sensor 6 becomes the set temperature. That is, when the output temperature of the temperature sensor 6 is lower than the set temperature, the lid heater 5 is energized, and when the output temperature is higher than the set temperature, the energization is stopped to adjust the temperature to the set temperature. In this embodiment, the set temperature is set to 55 ° C.

The rice and water inside the inner pot 3 are heated from below by the rice cooker 2 and also from above by the lid heater 5. The higher the water temperature, the easier it is for water to absorb water, and if the rice is heated only from below using the rice cooker 2, the lower temperature rises first and only the lower rice absorbs water and becomes softer. On the contrary, the upper part becomes hard. However, in this embodiment, since the lid heater 5 is also heated from above, the temperature unevenness in the upper and lower portions can be reduced, and rice can be absorbed in the same manner. In particular, microcomputer-controlled rice cookers, which are often seen in recent years, are provided with a process of maintaining the water temperature at a constant time for a certain period of time, such as "preheating cooking" or "soaking cooking" at the beginning of rice cooking. When the water temperature exceeds 60 ° C, the surface begins to gelatinize and does not absorb moisture up to the core, so keep it at 40-50 ° C for a certain period of time, let the rice absorb the water enough to the core, and then cook it. . In the configuration of the present embodiment, in particular, uniform heating can be performed in this step, which is effective.

When this step is completed and the cooking step is completed, the electric power is supplied to the rice cooker 2 by the power supply control means 7 and the water temperature rises, and when the steam starts to come out, the steam hits the lid 4 and this time heats the lid 4. . The temperature sensor 6 provided on the lid 4 detects this temperature rise and detects the temperature T (about 70 ° C.).
° C), the boiling detection means determines that boiling. When boiling, the heating amount of the rice cooker 2 is reduced by the power supply control means 7. This is equivalent to the "Let's play around" at the beginning of "The beginning chorochoro ...". It has the effect of preventing excessive steam spouting and cooking spills, extending the cooking time and bringing out the umami of rice. After the determination of boiling, the heating of the lid 4 by the temperature adjusting means 8 may be stopped, or the set temperature may be reset to a temperature higher than the boiling detection temperature (temperature T) and the lid 4 may be heated even after boiling. It may be.

Effect of the Invention As described above, in the present invention, by setting the set temperature of the temperature control means for controlling the energization of the lid heater to a set temperature lower than the boiling detection temperature (water temperature T), it is possible to detect the boiling while heating the lid. As a result, a very delicious rice can be provided by the synergistic effect of the effect of heating the lid and the effect of controlling the energization of the rice cooker by detecting boiling.

In the present embodiment, the energization control of the rice cooker is performed immediately after the boiling is detected. However, the operation of the energization control means may be delayed until a certain time is measured after the detection of the boiling.

[Brief description of the drawings]

FIG. 1 is a sectional view of a rice cooker according to one embodiment of the present invention, and FIG.
The figure shows a heater circuit configuration diagram of the rice cooker, and FIG. 3 shows a temperature characteristic diagram of the lid and a diagram of the state of energization to the lid heater. DESCRIPTION OF SYMBOLS 1 ... Main body, 2 ... Heater for rice cooking, 4 ... Lid 5 ... Lid heater, 6 ... Temperature sensor, 7 ... Electrification control means, 8 ... Temperature adjustment means, 9 ... Boiling detection means.

Claims (2)

(57) [Claims] 1. A rice cooker body (1) with a rice cooker (2)
And energization control means (7) for controlling the energization,
A lid heater (5) and a temperature sensor (6) for detecting a temperature are provided on a lid (4) for closing an upper opening of the main body (1), and the detected temperature of the temperature sensor (6) is set to a set temperature. A temperature control means (8) for controlling the energization of the lid heater (5), and an output temperature of the temperature sensor (6) at a temperature (T) higher than a set temperature of the temperature control means (8) by steam generated during cooking. The body (1) is provided with a boiling detection means (9) for judging boiling when the temperature has reached, and after the boiling is detected, the heating amount of the rice cooker (2) is adjusted by the immediately energizing control means (7). A rice cooker characterized in that: 2. The rice cooker according to claim 1, wherein the amount of heating of the rice cooker (2) is adjusted by the power supply control means (7) after a certain time after the detection of boiling.