JPH0153049B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an electric cooker for both rice cooking and slow cooking for use in general households.

Conventional structure and its problems Conventionally, in this type of electric cooker, a heat retention thermostat for slow heating was installed near the heating element, and the temperature was maintained at a constant level from the start of cooking in order to activate the heat retention thermostat. It may take too long to reach the desired temperature, or if you have a cooker that combines rice cooking and slowing, you can speed up the rise time of the water in the rice cooking mode, but you have to manually switch to the slowing mode, so the voltage may be too high. If the switching timing is delayed due to variations in the start-up time due to fluctuations and room temperature conditions, there have been problems such as boiling over.

Purpose of the Invention The present invention solves these conventional problems, speeds up the rising time of the water temperature, automatically switches to the slowing state at accurate timing, and furthermore, uses a selection switch to To provide an electric cooker that can also be used as a standard electric rice cooker.

Structure of the Invention The electric cooker of the present invention is provided with a heating element that heats the pot, which is located below the main body that houses the pot, and a heat-retaining thermostat near the heating element, and a heat-retaining thermostat that is connected to the main body at one end on the top of the main body. A switching thermostat for detecting steam is installed on the lower inner surface of the lid that is locked and covers the opening of the pot, and these heat retention thermostats and switching thermostats are connected in parallel, and the switching thermostat generates steam from inside the pot. Because it operates by detecting the temperature of the steam coming in, it is unaffected by voltage fluctuations and room temperature conditions, and the thermostat controls the temperature of the rising water at full power, accurately slowing it down without causing it to boil over. This allows it to be moved to the side.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. In Fig. 1, 1 is a main body that removably stores a pot 2, and 3 is a main body that houses a pot 2 inside the main body 1.
A protective frame 5 holds a heating element 4 on which the pot 2 is placed and heats the bottom surface, and a scroll plate 5 is fixed to the bottom of the heating element 4 and is set to maintain the temperature inside the pot at 90°C to 98°C. King thermal thermostat, 6
8 is a center thermostat that detects the temperature inside the pot or when the pot is empty and opens the main power switch 7. 8 covers the upper opening of the pot 2 and is opened and closed by a hinge 9 at one end of the top of the main body 1. A freely pivoted lid body,
10 is an inner lid detachably locked to the lower surface of the lid;
1 is fixed to the lower surface of the lid body 8 facing the inner lid 10,
A metal cover having a tube communicating with the outside air, 12 a switching thermostat for sensing steam temperature fixed to the inner surface of the cover 11, 13 operating parts for the main power switch 7 and the rice cooking/cooking switch 14; 15
is a heat-retaining heater wrapped around the outer surface of the protective frame 3.

In the above configuration, the operation will be explained based on FIG. 2. The pot 2 containing food to be cooked is set in the main body 1, the selector switch 14 is set to the thermostat circuit side, and the main power switch is turned on. Enter 7.

The temperature inside the pot gradually rises due to the heat generated by the heating element 4, but the temperature rise in the heating element 4 is much faster than the rise inside the pot, so the OFF temperature is set at 90 to 110 degrees Celsius for slow heating. The heat retention thermostat 5 that is set and attached to the heating element turns off while the temperature inside the pot is rising, but when it is attached to the inner cover 11,
The switching thermostat 12 connected in parallel with the heat-retaining thermostat 5 remains ON unless the temperature inside the pot exceeds 90°C and steam rises, so the heating element continues to be energized and the pot is turned on. The rate of increase in internal temperature is maintained. When the temperature inside the pot reaches 90℃ or higher, steam starts to be generated, and the temperature inside the pot increases.
Inner cover 11 whose temperature was rising by 20 to 30 degrees Celsius
The temperature of the pan began to rise rapidly, and the experimentally determined set temperature was 70 to 80℃, but the temperature inside the pot was 90℃.
With the above, and before it boils, it is definitely turned off,
After that, the temperature inside the pot is set to 90℃ by the heat retention thermostat 5.
The temperature is controlled at ~98°C, the most suitable temperature for slow cooling. At this time, the switching thermostat 12
Continuously generated steam from inside the pot
Since the temperature is maintained at close to 100℃, it will not be reset unless the main power switch 7 is turned off and the temperature inside the pot drops, and the heat retention thermostat 5 will not change even for a long time.
This allows cooking to be done with just the operation of a chisel.

FIG. 3 shows yet another embodiment, in which selector switches 14 are installed at both ends of the thermostat circuit of the above embodiment.
It is an application of time switch 16 instead of
When the time switch 16 is set, the rice-cooking bypass circuit is switched to the thermostat circuit, and the timer motor operates to turn off all circuits after a certain period of slowing, and set the slowing time. It has the effect of making it possible.

In the above embodiment, an electric cooker is used that serves both rice cooking and slow cooking, but it is also possible to add a heat retention function by providing a heat retention heater 15 inside the lid and on the outer surface of the protective frame. This is something that can further increase added value.

Effects of the Invention As is clear from the above-mentioned embodiments, the electric cooker of the present invention has a switching thermostat that is located inside the lid and operates at the steam temperature, and a thermostat that controls the power supply of the heating element. By connecting in parallel a thermostat that controls the temperature inside the pot at a constant temperature of 90 to 98 degrees Celsius, the temperature inside the pot can be raised quickly, and once the predetermined temperature is reached, there will be no boiling over. Since it is possible to reliably switch to the slow cooking state, it can be used very conveniently not only for slow cooking, but also for cooking rice porridge, which is particularly prone to boiling over during cooking.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an electric cooking appliance showing one embodiment of the present invention, FIG. 2 is a circuit diagram thereof, and FIG. 3 is a circuit diagram of another embodiment of the present invention. 4... Heating element, 5... Heat retention thermostat, 1
2...Switching thermostat, 14...Switching switch.

Claims (1)

[Claims] 1 A pot that is removably housed in a main body, a lid that can be opened and closed by a hinge provided at the top of the main body and covers an upper opening of the pot, and a heating element that heats the bottom of the pot. A thermostat circuit is provided in which thermostats are connected in parallel in the lid body and in the vicinity of the heating element that heats the bottom surface of the pot, and a bypass circuit is provided to shorten this thermostat circuit and this thermostat circuit. An electric cooker in which a heat generating element and a selector switch for selecting between the two are connected in series.