JPH0695977B2 - rice cooker - Google Patents

Description

TECHNICAL FIELD The present invention relates to a rice cooker controlled by a microcomputer.

2. Description of the Related Art Conventionally, in this type of rice cooker, as shown in FIG. 5, a temperature sensor that detects the temperature of the inner pot detects the rice cooking end detection temperature T ₃ to terminate the rice cooking and stop the power supply to the rice cooking heater. It was switched to the next stripping step (the explanation is omitted).

Problems to be Solved by the Invention According to the above configuration, even after the power to the rice cooking heater is stopped, some heating is performed due to the heat storage property of the rice cooking heater, and the bottom of the inner pot rises up to the rice cooking end detection temperature T ₃ or higher. And then
There was a problem of "burning". To reduce the occurrence of "burnt", it is necessary to set the rice cooking end detection temperature T ₃ low, but the temperature at the bottom of the rice cooker may change during rice cooking depending on the degree of adhesion between the rice cooker and the rice cooking heater, and the fluctuation of the voltage. Since the temperature may rise to high and the rice is erroneously finished without being completed, the rice cooking end detection temperature T ₃ cannot be set low.

Means for Solving the Problems The present invention has been made in order to eliminate the above-mentioned drawbacks, and a rice cooking heating means for controlling energization to a rice cooking heater and a charcoal saving for switching to a weak electric energy of a predetermined time t. Means, a reheating means to be executed after the operation of the charcoal saving means is finished, and a cooked rice terminating means for switching to the muffler process when the output of the temperature sensor is equal to or higher than the operating temperature. When the temperature T ₁ is detected while the rice cooking heating means is being executed, it is switched to the charcoal saving means and
The operating temperature of the cooked rice terminating means during execution of the charcoal saving means is set to a _second temperature T ₂ higher than the first temperature T ₁ , while the operating temperature of the cooked rice terminating means during execution of the cooked rice heating means and the reheating means. Is set to a _third temperature T ₃ which is higher than the second temperature T ₂ .

Furthermore, the rice cooking heating means is provided with a heating step consisting of a high heat step and a low heat step, and when the first temperature T ₁ is detected during execution of the high heat step, the control to limit switching to the charring save means and continue the high heat step. The means is provided in the cooked rice heating means.

With the above-mentioned configuration, the rice is heated by the rice heating means, and immediately after the rice is cooked, it is switched to the charcoal saving means to reduce the amount of power and lower the temperature of the rice cooker,
The rice cooking is ended by detecting the second temperature T ₂ . The second temperature T ₂ is set lower than the operating temperature of the conventional example, and since the temperature of the rice cooking heater is also low, no charring occurs.
It is also possible that the temperature may exceed the first temperature T ₁ during cooking due to voltage fluctuations or the degree of contact between the rice cooker and the rice cooker, causing the charcoal to switch to the save mode. Since the temperature does not rise sharply as when the temperature disappears, a certain time t elapses before reaching the second temperature T ₂ , the operation of the charring save means ends, and the reheating means is switched to. Since the reheating means does not finish the rice cooking up to the operating temperature similar to the conventional example, the effect of reducing the burning is lost, but the rice cooking is not accidentally finished during the rice cooking.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

The configuration of this embodiment is as shown in FIG. 1, and FIG. 2 is a diagram for explaining the operation, and FIGS. 3 and 4 show the correlation between the temperature sensor and the rice cooking heater during normal rice cooking and abnormal rice cooking. The figure is shown. In the figure, reference numeral 1 is a bottomed cylindrical main body, and a detachable inner pot 3 is housed therein so as to come into contact with a rice cooking heater 2 attached to the inner bottom. Reference numeral 4 denotes a temperature sensor which projects from the central portion of the rice cooking heater 2 so as not to come into contact with the rice cooking heater 2 and is thermally coupled to the bottom of the inner pot 3 by a spring (not shown). 5 means for ending cooking rice, 6 means for heating rice, 7 means for saving charring, 8 for reheating means,
Reference numeral 9 is a limiting means, each of which is provided in the control unit 10 and configured by a program of a microcomputer.

The power supply to the rice cooking heater 2 is controlled by the rice cooking ending means 5, the rice cooking heating means 6, the charcoal saving means 7, and the reheating means 8.

The cooked rice heating means 6 comprises a high heat process in the first half and a low heat process in the latter half, and the limiting means 9 burns in the high heat process.
It limits the operation of.

When the output temperature of the temperature sensor 4 exceeds the third temperature T ₃ while the rice cooking heating means 6 and the reheating means 8 are operating, the rice cooking ending means 5 stops the operations of the rice cooking heating means 6 and the reheating means 8 The process is shifted to the process.

Further, the cooked rice terminating means 5 is adapted to shift to the unevenness process when the output temperature of the temperature sensor 4 exceeds the second temperature T ₂ during the operation of the charcoal saving means 7.

The charcoal saving means 7 is adapted to operate when the output temperature of the temperature sensor 4 exceeds the first temperature T ₁ in the low heat process in which the restriction of the restriction means 9 in the cooked rice heating means 6 is released.

The reheating means 8 is executed when the operation of the charring and saving means 7 is completed.

Next, the operation of this embodiment having the above configuration will be described.

When a user puts rice and water in the inner pot 3 and stores them in the main body 1 and operates a rice cooking switch (not shown), the rice cooking heating means 6 operates to energize the rice cooking heater 2 in the high heat process. At this time, the rice cooking heater 2 and the temperature sensor 4 as shown in FIG.
Temperature rises. Eventually, when the high heat process is completed, the mode is switched to the low heat process. At this time, the restriction of the restriction means 9 is released. When the inside of the inner pot 3 runs out of water and cooking rice approaches the end, the temperature at the bottom of the inner pot 3 starts to rise. Along with this, the output temperature of the temperature sensor 4 also rises, exceeding the first temperature T ₁ (eg 110 ° C.), and the charring and saving means 7 operates.
The burn-saving means 7 reduces the amount of electricity to the rice cooking heater 2 to keep the temperature of the rice cooking heater 2 low, and
The set operating temperature of the rice-cooking ending means 5 is lowered to a _second temperature T ₂ (eg 120 ° C.) lower than the operating temperature at the end of the conventional rice-cooking. Since the temperature rise at the end of cooking rice is rapid, the temperature immediately exceeds the second temperature T ₂ , and the process shifts to the Murashi process.

Next, FIG. 4 shows an example of the case where the output temperature of the temperature sensor 4 exceeds the first temperature T ₁ during the rice cooking due to the close contact between the inner pot 3 and the rice cooking heater 2. In FIG. 4, after switching to the low heat process, the first temperature T ₁ is exceeded and the charcoal saving means 7 is operating. The charcoal saving means 7 finishes its operation at a fixed time t and is switched to the reheating means 8. Since the temperature of the temperature sensor 4 does not rise suddenly during rice cooking, the second temperature T ₂ is not exceeded during the fixed time t and the temperature is switched to the reheating means 8. In the reheating means 8, the rice cooking end means 5
Since the set operating temperature of 3 becomes the third temperature T ₃ (eg, 130 ° C.), the rice will not be stopped during the rice cooking even if the temperature exceeds the second temperature T ₂ . When the cooking is approaching the end, the temperature will exceed the third temperature T ₃ and the temperature will shift to unevenness.

EFFECTS OF THE INVENTION According to the present invention as described above, the first temperature is maintained while continuing the heating means for cooking rice.
When detecting a T ₁ is running scorching saving means switched the operating temperature of the cooking termination unit higher than the first temperature T _1, and the conventional operating temperature (corresponding to a third temperature T ₃₎ By setting the second temperature T ₂ to be low, it is possible to reduce the charring, while the operating temperature of the rice cooking end means during the execution of the abnormal heating rice cooking means and the reheating means by than the second temperature T ₂ to a higher third temperature T ₃ (operating temperature corresponding at conventional cooking termination), that no cooker to end quickly cooking erroneously even under such cooking conditions Can be provided.

[Brief description of drawings]

1 is a perspective view of a rice cooker according to an embodiment of the present invention, FIG.
The figure is a diagram for explaining the same operation, FIGS. 3 and 4 are the correlation diagrams of the temperature of the rice cooking heater and the temperature sensor during normal rice cooking and abnormal rice cooking, the energization state to the rice cooking heater, and FIG. FIG. 4 is a correlation diagram of the temperature of the rice cooking heater and the temperature sensor of the rice cooker, and the energization state to the rice cooking heater. 1 ... Main body, 2 ... Rice cooking heater, 3 ... Inner pot, 4 ... Temperature sensor, 5 ... Rice cooking ending means, 6 ... Rice cooking heating means, 7 ... Burn saving means, 8 ... Reheating means , 9 ... Limiting means, 10 ... Control section.

Claims (2)

[Claims] 1. A rice cooking heater (2) for heating an inner pot (3) housed in a main body (1), and a temperature sensor for detecting the temperature of the inner pot (3) heated by the rice cooker (2). (4) and a rice cooker including a control unit (10) for controlling the rice cooking process, and a rice cooking heating means (6) for controlling energization of the rice heating heater (2) and a predetermined fixed time t weak Burn-saving means (7) for switching to electric energy, reheating means (8) executed after the operation of the burn-saving means (7) is finished, and unevenness when the output of the temperature sensor (4) exceeds the operating temperature. A rice cook ending means (5) for switching to the process is provided in the control section (10), and when a predetermined first temperature T ₁ is detected during the rice cook heating means (6), a charring save means (7) is provided. While switching to, burning means (7) is running The operating temperature of the rice cooking end means (5) is set to a _second temperature T ₂ higher than the first temperature T ₁ ;
On the other hand, the operating temperature of the rice cooking end means (5) is set to a _third temperature T ₃ higher than the second temperature T ₂ while the rice cooking heating means (6) and the reheating means (8) are being executed. Rice cooker. 2. The cooked rice heating means (6) comprises a heating step consisting of a high heat step and a low heat step, and when the first temperature T ₁ is detected during execution of the high heat step, a charring save means (7).
The rice cooker according to claim 1, further comprising a limiting means (9) provided inside the rice cooking heating means (6) for limiting switching to the rice cooker and continuing the high heat process.