JPH0767419B2 - rice cooker - Google Patents

Description

TECHNICAL FIELD The present invention relates to a rice cooker used in general households.

2. Description of the Related Art Generally, when rice is cooked and kept warm in a rice cooker, for example, when steam generated from rice in a pot 21 shown in FIG. As dew, it travels through the upper frame 25 and flows into the dew receiver 26. Therefore, when trying to abolish the dew tray 26, a heat sink is used when cooking rice and keeping warm.
It is premised that no condensation occurs on the inner cover 23 and the inner lid 22, and as a solution to this, energize the lid heater 27 arranged on the heat dissipation plate 23,
A mechanism for increasing the temperature of the heat dissipation plate 23 and the inner lid 22 to prevent dew condensation has been considered.

However, while raising the inner lid 22 and the heat dissipation plate 23, the outer lid 24
It was necessary to suppress the temperature rise in order to prevent deformation and discoloration of resin parts such as.

The present invention is to solve the above-mentioned problems, and suppresses dew when the lid is opened by preventing dew condensation on the inner lid and the heat dissipation plate during rice cooking and heat retention, and abolishes the dew receiving. The purpose is to prevent temperature rise of parts and the like and to prevent damage to each part.

Means for Solving the Problems In order to solve the above problems, the rice cooker of the present invention comprises a rice cooker body, a pan that is detachably housed inside the rice cooker body, and an upper opening portion of the rice cooker body. An outer cover for covering, a heat radiating plate for covering a lower opening of the outer cover, and a heat sensitive member and a lid heater arranged on the heat radiating plate are provided, and the temperature sensed by the heat sensitive member is set to a predetermined temperature, for example, 110. The temperature is set to ° C, and the energization of the lid heater is controlled for this set temperature.

Operation Next, the operation of the above configuration will be described below. The steam generated by the rice stored in the pan inside the rice cooker body due to rice cooking and heat retention condenses on the radiator plate and inner lid, but the temperature of the radiator plate and inner lid is raised by energizing the lid heater,
Evaporate condensed dew and prevent condensation. On the other hand, when the temperature sensed by the heat-sensitive member reaches, for example, 110 ° C., the energization of the lid heater is stopped, and overheating of the outer lid and the like is prevented to prevent deformation and discoloration of each component. When the temperature of the heat-sensitive member drops to 110 ° C with the passage of time, the lid heater is again energized to prevent the temperature drop of the heat radiating plate and the inner lid, and this operation is repeated.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an upper sectional view of a rice cooker according to an embodiment of the present invention. In FIG. 1, a pot 2 is detachably housed inside a rice cooker body 1. A hinge part 3 is provided on one side of the upper end of the rice cooker body 1, and a hook receiving part 4 is provided at a position facing the hinge part 3. The outer lid 5
One side thereof is pivotally supported by the hinge part 3 to rotatably cover the upper opening of the rice cooker body 1, and a hook 6 is provided at a position opposite to the pivotally supported side. The hook 6 is detachable from the hook receiving portion 4 of the rice cooker body 1. The lower opening of the outer lid 5 is covered with a heat radiating plate 7, an inner lid holder 8 is provided at the center of the heat radiating plate 7, and a temperature sensor 9 and a lid heater are provided above the heat radiating plate 7. Each is fixed by aluminum foil tape 11. 12 is a vent. A holder 14 made of a flexible material such as rubber is provided in the center of the inner lid 13 that covers the upper opening of the pot 2, and the holder 14 is detachable from the inner lid holder 8 of the heat dissipation plate 7. Also, a hole A1 is formed in the center of the inner lid 13.
Holes B15b are provided at 5a and the bottom of the outer periphery, respectively. A pot packing 16 made of a flexible material such as rubber is provided on the outer periphery of the heat radiating plate 7, which is pressed against the outer periphery of the pot 2 when the outer lid 5 is closed, and the inside of the rice cooker body 1 is sealed. It becomes a state.

The temperature sensed by the temperature sensor 9 is set to 110 ° C., for example, and the energization of the lid heater 10 is controlled with respect to this set temperature.

FIG. 2 is a circuit diagram of a rice cooker according to an embodiment of the present invention.
In FIG. 2, a temperature-sensitive reed switch (hereinafter referred to as TRS) as a temperature sensor 9 is connected in series to the lid heater 10 and connected to a power source. With this configuration, the lid heater 10 is energized and controlled at 110 ° C. at the temperature set by TRS.

17 is a rice cooking heater provided at the bottom of the main body, and the rice cooking operation is performed by turning on the temperature sensitive switch 18.
It is done by energizing 17, but the lid heater 10
Energizes via a TRS (temperature sensor) 9 to perform a heating operation for preventing dew condensation. When temperature exceeds 110 ℃, TSR9
This cuts off the energization and prevents the temperature from rising excessively.

For the heat retention operation, the TRS20 controls the heat insulation heater 19 and the rice cooking heater 17 provided on the side of the main body at a constant temperature, and during this time, the lid heater 10 also energizes during the heating operation to prevent dew condensation. I do.

According to the rice cooker with the above configuration, when the rice is cooked and kept warm, the water contained in the pan 2 and the water contained in the rice cause
The generated steam condenses on the inner lid 13 and the heat radiating plate 7, and when the lid heater 10 is energized, the inner lid and the heat radiating plate 7 are 110 ° C.
It is heated up to about 130 ℃ and the condensed dew evaporates. On the other hand, when the temperature sensor 9 reaches 110 ° C., the energization of the lid heater 10 is stopped, so that it is possible to prevent the temperature of the resin component such as the outer lid 5 from excessively rising. Therefore, prevent abnormalities such as deformation and discoloration. You can When the temperature sensor 9 drops below 110 ° C with the passage of time, the lid heater is re-energized and the inner lid 1
3. Prevents the temperature drop of the heat sink 7 and prevents dew condensation.

As described above, according to the present invention, it is possible to eliminate the dew receiving by preventing the dew condensation on the inner lid and the heat radiating plate, which improves the easiness of maintenance at the time of use and reduces the cost. The down can be achieved, and the safety can be secured without damaging each component such as the outer lid.

[Brief description of drawings]

FIG. 1 is an upper sectional view of a rice cooker showing an embodiment of the present invention, FIG. 2 is a circuit diagram of the rice cooker showing an embodiment of the present invention, and FIG. 3 is an upper sectional view of a conventional rice cooker. is there. 1 ... Rice cooker body, 2 ... Pan, 5 ... Outer lid, 7 ... Radiating plate (radiating member), 8 ... Temperature sensor (heat sensitive member), 10
…… Lid heater.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsuaki Suzuki 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References: 61-56925 (JP, U)

Claims (1)

[Claims] 1. A rice cooker main body, a pan to be housed inside the rice cooker main body, an outer lid that openably and closably covers an upper opening of the rice cooker main body, and a heat dissipation member that covers a lower opening of the outer lid. When,
A rice cooker comprising a heat sensitive member and a lid heater disposed above the heat dissipation member, and stopping energization of the lid heater when a sensed temperature of the heat sensitive member reaches a predetermined set temperature.