JPH088892B2 - rice cooker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a microcomputer-controlled rice cooker that has been widely used in recent years.

(Prior Art) This type of rice cooker measures the temperature of the bottom of the inner pot or the side of the inner pot with a temperature sensor, and determines the amount of rice cooked by the temperature rise curve of the inner pot during rice cooking. High-temperature cooked rice that cooks with constant power regardless of the amount of cooked rice, because the cooked rice is cooked with the power that matches the amount of cooked rice It has modes, and in the past, these modes were selected by the detection output of the temperature sensor immediately after the user operated the rice cooking switch at the start of rice cooking.

(Problems to be solved by the invention) However, in the conventional method, if the inner pot is stored in the main body and the rice cooker switch is operated while the main body and the temperature sensor are warm, such as immediately after heat retention or immediately after cooking rice, even if the inner pot is at low temperature Depending on the followability of the temperature sensor, there was a problem that the high temperature rice cooking mode was selected instead of the low temperature immediately. As a result, the high-temperature rice cooking mode cooks with constant power regardless of the amount of rice cooked, so there was a problem that it could not cook deliciously compared to the normal rice cooking mode in which the rice was cooked with power commensurate with the amount of rice cooked.

(Means for Solving Problems) The present invention has been made to solve the above problems, and a detection means for detecting the temperature of the inner pot by a temperature sensor for a certain period of time is provided. A normal rice cooking mode starting means for executing the normal rice cooking program when the temperature is less than a certain temperature is provided, and a high temperature rice mode starting means for executing the high temperature rice cooking program when the time of the certain time is finished.

(Operation) By doing so, the temperature of the inner pot is detected through the temperature sensor for a certain period of time, and the rice is cooked in the optimum rice-cooking mode through the change of the certain temperature within the certain period of time.

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 shows a flowchart of the same operation. In the figure, reference numeral 1 is a bottomed cylindrical main body having an opening at the top and accommodating a removable inner pot 2 inside. A temperature sensor 3 is mounted inside the main body 1 so as to be in close contact with the outer bottom portion of the inner pot 2 and detects the temperature of the inner pot 2. A rice cooking heater 4 is mounted inside the main body 1 so as to be in close contact with the outer bottom of the inner pot 2 and heats the inner pot 2. A lid 5 is attached to the main body 1 so as to be openable and closable so as to cover the openings of the main body 1 and the inner pot 2. 6 is a rice cooker switch 1
It is provided on the outside and is operated at the start of rice cooking. Numeral 7 is a detecting means which is provided inside the main body 1 and starts its operation by operating the rice cooking switch 6, and the temperature sensor 3 determines whether the inner pot 2 is below a certain temperature T for a certain time θ and a certain time θ. To determine the progress of.
Reference numeral 8 is a normal rice cooking mode starting means, 9 is a high temperature rice cooking mode starting means provided inside the main body, and when the temperature less than a certain temperature T is detected within a certain time θ by the detecting means 7, the above-mentioned means 8 is used for the normal rice cooking program. 11 is executed, and the high-temperature rice cooking program is also executed by the means 9 at the end of a certain time θ.
It is the one that runs twelve. 10 is a rice cooking lamp, which is provided on the outer side of the main body 1 and is turned on during rice cooking.

 Next, the operation of this embodiment will be described.

The user puts the washed rice and an appropriate amount of water in the inner pot 2 and the main body 1
When the lid 5 is closed after it is stored in the
It adheres to the outer bottom surface and is thermally bonded. Next, when the rice-cooking switch 6 is operated, the rice-cooking lamp 10 lights up, indicating that the rice-cooking state has been entered, and the detecting means 7 starts operating.
As shown in FIG. 2, the detecting means 7 determines whether the temperature output of the temperature sensor 3 is less than a constant temperature T (example 80 ° C.) and measures a constant time θ (example 60 seconds), and the constant time θ has passed. Determine if

Therefore, in normal use, the constant temperature T
Since it does not exceed the temperature, the temperature is judged to be less than the constant temperature T through the detecting means 7, the normal rice cooking mode starting means 8 operates, the normal rice cooking program 11 determines the amount of rice cooked, and the power corresponding to the result is used. Rice is cooked.

In addition, when the user mistakenly operates the rice cooking switch 6 to perform so-called empty cooking, or when the rice is continuously cooked such as when the main body 1 and the temperature sensor 3 are warmed, the inner pot 2 is housed in the main body 1 and the rice cooking switch 6 When is operated, the rice cooking lamp 10 is turned on and the detecting means 7 starts operating in the same manner as above. At this time, the rice and water in the inner pot 2 may reach a certain temperature T or higher because there is not enough time for the temperature sensor 3 to cool even at low temperatures. In this case, the detecting means 7 constantly measures the output temperature of the temperature sensor 3 while measuring the constant time θ as shown in FIG. At this time, the normal rice cooking mode starting means 8 is operated and the rice is cooked by the normal rice cooking program 11 as described above. If the temperature does not fall below the constant temperature T even after the fixed time θ has been measured, it becomes clear that both the rice and water in the temperature sensor 3 and the inner pot 2 are at the constant temperature T or higher, so the high-temperature rice cooking mode starting means 9 Operates and cooks rice with constant power according to the high-temperature rice cooking program 12. As a case of this high-temperature rice cooking program 12, when a user tries to cook rice with hot water (so-called hot water cooking), or when a microcomputer-controlled rice cooker does not have a special configuration, a power failure occurs during rice cooking. At the time of re-energization, it is not possible to know how much of the normal rice cooking program 11 was executed before the power failure and how the rice cooking amount judgment result was, so a series of operations related to the rice cooking process from the rice cooking switch 6 operation was performed again, The high temperature rice cooking program 12 is executed when the rice cooking program 11 is not suitable for execution.

(Effects of the Invention) As described above, according to the present invention, the normal rice cooking program and the high temperature rice cooking program are surely executed by detecting the state of the constant temperature within the constant time from the start of rice cooking through the detecting means. Therefore, you can get a rice cooker that cooks delicious rice in any case.

[Brief description of drawings]

FIG. 1 is a perspective view showing the appearance of a rice cooker according to an embodiment of the present invention while the inner pot is being taken out, and FIG. 2 is a flowchart of the same operation. 1 …… Main body, 2 …… Inner pot, 3 …… Temperature sensor, 4 …… Cooking heater, 7 …… Detecting means, 8 …… Normal cooking mode starting means, 9
…… High temperature rice cooking mode start means, 11 …… Normal rice cooking program, 12 …… High temperature rice cooking program, θ …… Temporary time, T ……
Constant temperature.

Claims (1)

[Claims] 1. A rice cooking heater (4) for heating a detachable inner pot (2) housed in the main body (1), and a temperature sensor (3) for detecting the temperature of the inner pot (2). Therefore, the temperature sensor (3) detects the temperature of the inner pot (2) for a fixed time (θ), and the detection result of the detection means (7) is a preset constant temperature (T ), The normal rice cooking mode starting means (8) for executing the normal rice cooking program (11) is provided, and the fixed time (θ)
A rice cooker characterized by comprising a high-temperature rice cooking mode starting means (9) for executing a high-temperature rice cooking program (12) when the timing of (1) is finished.