JPS6038420Y2 - Heat-retaining rice cooker - Google Patents

Description

[Detailed description of the invention] The present invention provides a heat-retaining rice cooker that has a simple configuration and cooks extremely delicious rice.

Traditionally, in order to cook rice deliciously, it has been said to ``start slowly'', ``middle patsupa'', ``turn off the heat when it sizzles'', and ``don't remove the lid even if the baby cries'', so you should turn the heat to high halfway through cooking. This can be obtained by stirring the rice evenly for several minutes without opening the lid after cooking is complete.

However, although various rice cookers that perform such operations have been developed up to now, they have complex structures and are troublesome to operate.

The present invention was developed in view of the above-mentioned points, and an example will be explained below with reference to an electric circuit diagram. The inner pot that houses the rice is heated from the bottom, and the resistance value itself is small and the calorific value is large, approximately 5.
Generates heat at 00W.

TH is a non-returnable rice cooking thermostat that senses the temperature rise at the outer bottom of the inner pot and opens when it senses the temperature has risen to about 140°C.

The rice cooking circuit composed of the rice cooking heater H0 and the rice cooking thermostat TH□ is connected to the power terminal E1. E, via a temperature fuse F.

1 is a rice-cooking lamp connected in parallel to the rice-cooking heater H1 via a protective resistor 2.

H2 is an uneven heater that generates less heat than the rice cooking heater H□, and generates heat at about 200W.

TH2 is a thermostat installed inside the main body that indirectly senses the temperature of the inner pot, for example, 100℃.
It is configured to open when it is below the vicinity and close when it is above it.

This uneven heater H2 and uneven thermostat T'
The boosting circuit constituted by H2 is connected in parallel with the rice cooking circuit described above.

H3 is a heat retention heater wrapped around the inner side surface of the main body,
It has a smaller calorific value than the uneven heating heater Tsuru, and its own resistance value is large, so when it is connected in series with the rice cooking heater H□, this warming heater H
3 generates heat at about 20W, and the rice cooking heater H1 generates heat at about 3W.

TH,3 is a thermostat for heat retention attached to the inner side of the main body, which indirectly senses the rising temperature of the inner pot through the gap between the inner pot and the main body, and is set at the optimum temperature for heat preservation, for example, around 70°C. It is configured to open and close.

And the heat retention heater and heat retention thermostat TH
3, the heat retention circuit consists of the rice cooking thermostat T
Connected in parallel with H1.

3 is connected to the rice cooking thermostat TH via a protective resistor 4.
This is a heat-retaining lamp connected in parallel with 1.

To explain the operation of the bark, first, when the rice cooking thermostat TH□ is manually closed, the rice cooking heater H1 generates heat at 500 W, and the "starting slowly" operation indicated by ■ begins.

Then, the temperature of the inner surface of the main body rises as shown in
When it detects °C, it closes and the heater for uneven heating is 200W.
generates heat, and the total of 7 with the 500W of the rice cooking heater H□
At 00W, the operation shifts to "medium patsupa" indicated by ■.

The temperature at the outer bottom of the inner pot rises like a mouth and reaches about 140℃, which is detected by the rice cooking thermostat TH1 and opened. At the same time, the rice cooking heater H0 stops generating heat, and the "shu shu" indicated by ◎ occurs. When it blows, it moves to the action of "drawing the fire."

Thereafter, the heating of only 200 W of the uneven heater H2 shifts to the operation indicated by 0, ``Do not remove the lid even if the baby cries.''

This is generally called uneven operation and the temperature of the rice in the inner pot is ○.
As shown in the figure, the temperature is maintained at about 100°C for a suitable number of minutes without decreasing.

Next, since the heat generation is only 200W, the temperature decreases overall, and when the temperature on the internal surface of the main body, indicated by The series circuit with heater H3 is energized by heat retention thermostat TH3, and the temperature reaches 70"C.
Shifts to heat-retaining operation to maintain temperature.

Since the present invention is constructed as described above, during the rice cooking process, the inner pot heats the rice slightly strongly -> Strongly heats -> Cuts off the strong heating suddenly -> Slightly weakly heats -> Weakly heated, and this heating order makes the rice extremely delicious. Moreover, these heating operations are performed automatically and reliably.

[Brief explanation of the drawing]

FIG. 1 is an electric circuit diagram used in the thermal rice cooker of the present invention, and FIG. 2 is an explanatory diagram of the operation that changes depending on time and temperature during rice cooking. 'm□, TH2, TH3...Thermostat,
Hl. Toshi, H3... Heater.

Claims (1)

[Scope of utility model registration request] A rice-cooking circuit consisting of a rice-cooking heater and a rice-cooking thermostat connected to a power supply, a rice-cooking heater with a smaller calorific value than the rice-cooking heater connected in parallel with the rice-cooking circuit, and a rice-cooking heater that closes at around 100°C or higher. It is characterized by being composed of an energizing circuit for a rice-cooking thermostat, a heat-retaining heater that generates less heat than the uneven heater connected in parallel with the rice-cooking thermostat, and a heat-retaining circuit for the heat-retaining thermostat that opens and closes at the optimum heat-retaining temperature. A heat-retaining rice cooker.