JP2587355B2 - rice cooker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice cooker, and more particularly to a rice cooker in which a gas burner and a heater are used in combination. The present invention relates to a rice cooker of a type in which a steaming step adopted to promote the conversion of rice into rice after heating of rice cooking and a heat retaining step thereafter are executed.

[0002]

2. Description of the Related Art A gas cooker of the type for performing the above-mentioned steps is disclosed in Japanese Utility Model Laid-Open No. 62-196126. In this cooker, heating up to the steaming step requires a gas burner. The heating is controlled by controlling the amount of supplied gas, and the heating is controlled by an electric heating device in the warming step after the steaming step.

[0003] Further, in the control in each step by the gas heating, it is necessary to frequently ignite and extinguish a gas burner, and it is necessary to shorten the ignition waiting time of the gas burner. The fire burner is always ignited and the main gas burner is set to fire. In other words, it is a seed ignition type. In the case of the above type, it is difficult to perform accurate heating control because the heating control is performed by gas burner control even when delicate temperature control is required in each heating control step until after the end of the steaming step. In addition, in order to perform accurate heating control, it is necessary to make the entire heating control device complicated and highly accurate. Further, the configuration of the gas circuit of the gas cooker becomes complicated.

According to the present invention, a "preheating step (S ₁ ), a rice heating step (S ₂ ), a steaming step (S ₃ ), and a warming step (S ₄ ) are executed.
In gas cookers that use both gas-fired power and electric heat-fired power, the problem is that accurate heating control can be performed, rice cooking time can be reduced, and the configuration of the gas circuit can be simplified. I do.

[0005]

The technical means of the present invention for solving the above-mentioned problem is described in "Preheating step by the gas burner (B)".
(S ₁ ) the initial heating and cooking rice heating step (S ₂ ) is executed, and the heater (H) controls the temperature after the initial heating in the preliminary heating step (S ₁ ), the steaming step (S ₃ ), and the heat retaining step. (S ₄ ) is executed ”.

[0006]

The above technical means operates as follows. The initial heating in the preheating step (S ₁ ) is performed by heating with a gas burner (B), and thus, until the temperature in the rice cooker rises to a predetermined preheating temperature, the high-heat heating with the gas burner (B) is performed. Become. Thereafter, the temperature control heating in the preheating step (S ₁ ) is performed by heating the heater (H).

Next, in the rice cooking heating step (S ₂ ), the heating step of the rice cooking heating step (S ₂ ) is executed by the thermal power of the gas burner (B). When the rice heating step (S ₂ ) is completed, the steaming step (S ₃ ) starts. In the steaming step (S ₃ ), the heater (H) performs temperature controlled heating. In this step, delicate heating control is required. However, since the temperature is controlled by the heater (H), this delicate heating control can be executed reliably.

[0008] In the subsequent warming step (S ₄ ), the temperature is controlled by the heater (H), so that the same heating control can be reliably performed.

[0009]

[Effect] Both the initial heating of the pre-heating step (S ₁ ) and the rice cooking heating step (S ₂ ), which need to shorten the rise time of heating, are performed by heating with the gas burner (B), and other delicate temperature control Since the heating step in which heating is required is temperature controlled heating by the heater (H), the time required from the preliminary heating step (S ₁ ) to the end of the steaming step (S ₃ ) can be reduced, and
In a process in which delicate temperature controlled heating is required, this requirement is sufficiently satisfied.

In the case where an ignition device (4) of the type which directly ignites by spark discharge is provided in the flame hole of the gas burner (B) at the beginning of the heating operation, it is necessary to provide a pilot flame burner. And the gas circuit can be simplified accordingly.

[0011]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. In the rice cooker of the embodiment shown in FIG.
The operation panel (3) is arranged on the top surface of the auxiliary chamber (31) in front of the main body case (2) that houses the main case (2), and the bottom opens and closes the circuit to the gas burner (B). A control device (C) including a gas valve device (33) and a comparator is housed,
These are electrically connected to the operation panel (3).

A rice cooker (20) is removably accommodated in the main body case (2), and a heat insulation cylinder (25) surrounding the outer periphery thereof.
And a gas burner (B) for heating the rice cooker (20) from below. The heat insulation barrel (25) is a rice cooker (20)
It is mounted on the body of the can accommodate the size bottomed cylindrical inner case of (2a), wherein the flame hole of the gas burner (B) is (B _1),
It projects into the inner case (2a) from the opening (24) formed in the bottom of the inner case (2a) and faces the bottom of the rice cooker (20). or,
An annular heater (H) is concentrically arranged on the outer periphery of the flame hole (B ₁ ), and its connection terminal protrudes downward from the bottom of the inner case (2a).

The valve device (33) accommodated in the auxiliary chamber (31) is gas-connected to the gas burner (B), and the valve device (33), the heater (H), and the flame hole ( An ignition device (4) with a discharge electrode (41) facing B ₁ )
(C) is electrically connected. In this embodiment, a temperature sensor (5) is provided so as to be in contact with the bottom of the rice cooker (20) in order to detect the completion of rice cooking. Input to device (C).

As shown in FIG. 1, the auxiliary chamber (31) is provided above the main body case (2) so that the rear end of the upper lid (60) of the lid (6) can be opened forward. ) At the rear end, and in the closed state, the engaging piece (6a) provided at the front end of the upper lid (60) projects to the front upper end of the main body case (2). It is structured to be locked to the provided engagement piece (6b). Then, if the lock device is released by operating the engagement piece (6a), the upper lid (60) is opened with the rear end as a fulcrum.

As shown in FIG. 1, an inner lid (61) is provided inside the upper lid (60). When the upper lid (60) is closed, the inner lid (61) is moved to the rice cooker ( The upper part of 20) will be closed in a sealed state. The inner lid (61) is the same as the conventional one,
In the center, a cylindrical shaft holder (22) is provided, and a plurality of through holes (7) (7) are formed near the periphery thereof. Then, a connecting shaft (2) is provided at the center of the lower surface of the upper lid (60).
When the shaft holder (22) is externally fitted to 3), the inner lid (61) is detachably connected.

In this embodiment, rice cooking in a process as shown in FIG. 2 is executed by the control device (C). Further, a microcomputer is employed as the control device (C), and executes an operation based on a flowchart shown in FIG. Hereinafter, the operation of the embodiment having the above configuration will be described in detail with reference to FIG. When starting operation, although pre-heating step (S ₁₎ is executed, the pre-heating step (S ₁₎
In this case, the gas burner is ignited directly by the conversion device (4), and the gas burner (B) is brought into a combustion state only during the initial heating (90 seconds), after which the gas burner (B) is extinguished and fired.
The heating is stopped for 0 seconds, and thereafter, the temperature is controlled by the heater (H) for 14 minutes. At this time, the temperature sensor
At (5), when the detected temperature is 40 ° C., the heater (H) is turned on, and when the detected temperature is 43 ° C., the heater (H) is turned off.

Thus, a preheating step of about 19 minutes is performed.
(S₁) Will be executed. After this, the ignition device (4)
It operates and is ignited by the gas burner (B) to cook rice cooking (S _Two)
Is executed. As a result, the temperature in the rice cooker (20) becomes
It is heated to the completion temperature, but at this time the temperature sensor (5)
At the time when the detected temperature reaches the primary fire extinguishing temperature (115 ° C)
The gas burner (B) is extinguished. This fire extinguishing time is a certain time
(30 seconds) and the gas burner (B) is ignited again
You. After this, the temperature detected by the temperature sensor (5) is
Gas temperature (135 ° C), the gas burner (B)
The fire was finally extinguished, and then the steaming process (S_Three), And warmth
Process (S_Four) Is performed.

In this embodiment, in the steaming step (S ₃ ), a heater is set so that the temperature is maintained in a range of 95 ° C. to 98 ° C.
Temperature controlled by (H). This temperature control step is maintained for 15 minutes. The end point of the steaming step (S ₃ ) is the final cooking end point, and in this embodiment, the display lamp is configured to flicker during the steaming step (S ₃ ), and the steaming step (S ₃ The flicker is stopped at the end of ()). Therefore, it is possible to determine whether or not the rice cooking is completed by using the display lamp. In the temperature control in this steaming step, the same control as that of the temperature controlled heating by the heater (H) in the preheating step described above is executed. When the temperature detected by the temperature sensor (5) reaches 95 ° C., the heater (H) is turned on. "
When the temperature reaches 98 ° C., the heater (H) is turned off.

After the steaming step, the warming step (S ₄ ) is executed, and the inside of the rice cooker (20) is maintained at the warming temperature by turning the heater (H) on and off. In order to execute the above control operation, the heater (H) must be
It is necessary to have a heating value (capacity) capable of performing the temperature control heating, steaming step (S ₃ ) and heat keeping step (S ₄ ) of (S ₁ ), and the heat from the heater (H) is efficiently used in each step. It is desirable to transmit to the rice cooker (20). To this end, as shown in FIG. 1, besides a method of disposing an annular heater (H) facing the bottom of the rice cooker (20), the heater (H) is provided on the heat insulating cylinder (25). It may have a built-in configuration.

[Brief description of the drawings]

FIG. 1 is an explanatory view of an embodiment of the present invention.

FIG. 2 is an explanatory diagram of the whole rice cooking process.

FIG. 3 is a flow chart of the control device (C), and is an explanatory diagram up to the primary fire extinguishing in the rice heating step.

FIG. 4 is a flowchart of the subsequent steps.

[Explanation of symbols]

(S ₁ ) ・ ・ ・ Preheating step (S ₂ ) ・ ・ ・ Rice heating step (S ₃ ) ・ ・ ・ Steaming step (S ₄ ) ・ ・ ・ Heat keeping step (20) ・ ・ ・ Rice cooker (B) ・..Gas burners (H) ... heaters (4) ... ignition devices

Claims (2)

(57) [Claims] A preheating step (S ₁ ), a rice cooking step (S ₂ ),
Perform the steaming step (S ₃ ) and the heat retaining step (S ₄ ), and cook the rice cooker (20).
In rice cooker having a gas burner (B) and the heater (H) for heating, to execute the initial heating and cooking the heating step of the pre-heating step (S ₁₎ (S ₂₎ by the gas burner (B), the heater ( H) a rice cooker in which a temperature-controlled heating and steaming step (S ₃ ) and a heat retaining step (S ₄ ) after the initial heating in the pre-heating step (S ₁ ) are executed. 2. The gas burner (B) according to claim 1, further comprising an ignition device (4) of a type that ignites by directly spark-discharging the flame holes of the gas burner (B) at the beginning of the heating operation. rice cooker.