JPS5937125Y2 - electric rice cooker - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an electric rice cooker, and is particularly aimed at preventing a rise in temperature at the bottom of the rice cooker body.

Most electric rice cookers consist of a lid, a frame, an outer pot built into the frame, an inner pot that can be stored inside the outer pot, and a heater installed at the inner bottom of the outer pot. The heating state is that after the inner pot is stored in the outer pot, the inner pot is placed directly on a heater to heat it, or the heater is installed in a state that projects upward from the inner bottom of the outer pot and radiates heat from it. There is a device that heats the inner pot with a heater, but even in the heating state where the heater is turned over, the radiant heat of the heater is transmitted not only upward, but also laterally and downward, and in particular, the heat radiated to the bottom side is transmitted to the back. There were drawbacks such as overheating of the lid, causing thermal deformation of the back lid, and abnormal temperature rise of the rice cooking switch knob, which caused inconvenience in its operation.

In other words, the space formed between the outer pot and the frame contains enough insulation material to fill the space, so the heat radiated downward cannot move upward and the back cover will overheat.

Incidentally, some people have created a small annular space between the side wall of the outer pot and the heat insulating material stored between the outer pot and the frame in hopes of creating a heat insulating effect due to the air, but this is simply because the side wall of the outer pot is Only a space was provided and it did not communicate with the bottom side of the outer pot, so it was not possible to suppress the temperature rise on the bottom lid side.

In view of the above points, the present invention prevents the temperature rise on the bottom side using the minimum amount of materials, and will be described below based on an embodiment shown in the drawings.

1 is a cylindrical frame, 2 is a bottomed cylindrical outer pot built into the frame 1, and 3 is a sheathed heater for cooking rice fixed to the inner bottom of the outer pot 2 in such a manner as to protrude upward. , 4
5 is a ring-shaped frame cover that fixes the upper periphery of the frame 1 and the upper periphery of the outer pot 2; 5 is an inner pot configured to be freely stored in the outer pot; 6/I''i between the frame 1 and the outer pot 2; It is a relatively thin heat insulating material housed in the outer pot 2 and has a thickness approximately half of the lateral dimension of the annular space between the frame 1 and the outer pot 2. An annular space G is formed between the heat insulating material 6 and the heat insulating material 6.

7 is a back cover provided at the bottom of the frame 1, and a cord winding device 8 is attached to the center side of the outer wall.

By fixing the back cover 7, a space S is formed between the outer bottom of the outer pot 2 and the back cover 7, and the space S is communicated with the annular space G over its entire circumference.

Reference numeral 9 denotes a lid whose one side is pivoted to the frame 1 so that it can be opened and closed, and the other side can be hung, and a heat insulating material 10 is housed inside.

11 is an inner lid whose outer periphery is placed on the upper periphery of the inner pot 5;
A protruding rod 12 is made to protrude from the center.

Reference numeral 13 denotes a heat-insulating lid which is provided between the inner surfaces of the inner lid 11 and the outer lid 9 and is detachably attached to the outer lid at the same time as the inner lid 11 by means of the protruding rod 12.

14 is a cord-like heat-retaining side heater attached to the upper part of the outer circumferential wall of the outer pot 2; 15 is a switch cover attached to one side wall of the frame 1; 16 has one end located inside the switch cover 15 and the other end; 17 is a switch knob fixed to one end of the switch lever 16 for starting rice cooking; 18 is a rice cooking switch connected to the heater 3; It is turned off by the operation of the ONL heat sensitive body.

Reference numeral 19 designates a heat sensitive element provided at the center of the bottom surface of the outer pot 2 and energized so as to project upward at all times, and 20I''i an electronic component attached to the upper wall surface of the back cover 7.

Next, to explain the operation, a predetermined amount of water and rice are put into the inner pot 5 and stored in the outer pot 2, and the inner lid 11 and the heat-insulating lid 13 are closed to the outer lid 9.
After attaching the outer cover 9 to the outer cover 9, close the outer cover 9.

When the switch knob 17 is pressed, the rice cooking switch 18 energizes the ONL heater 3 and heats the inner pot 5 with radiant heat.

At this time, the radiant heat of the heater 3 is transmitted not only upward but also to the sides and downwards, the side heat heats the outer pot 2, the downward heat heats the air in the space S, and the hot air is indicated by the arrow. Like empty space G
The inner pot rises to further heat the outer pot 2 and heat the side wall of the inner pot 5.

As described above, the lower space S and the side space G were made to communicate with each other to promote the rise of hot air, and as a result, the temperatures of each part became as follows.

In addition, the cooking time is determined by directing the hot air from the lower space S to the empty space G as described above.
Since it is used for heating the inner pot 5, the standard amount can be reduced by about 3 to 5 minutes compared to the conventional method.

In addition, in the present invention, the heat insulating material is stored on the inner wall side of the frame, and an annular space G is formed between the outer wall of the outer pot and the heat insulating material. Of course, it may be stored and formed between the heat insulating material and the inner wall of the frame.

As described above, the present invention includes an outer pot housed inside a cylindrical frame, an inner pot that can be stored inside the outer pot, a heater provided at the bottom of the outer pot, and a heater provided at the bottom of the outer pot and frame. A space formed at the bottom of the outer pot and a space formed between the heat insulating material and the outer pot or frame. Because the heat radiated to the bottom side of the outer pot heats the air in the space, this heated air flows through the space formed between the outer pot or the frame and the insulation material. This prevents the camera back from overheating abnormally.

In addition, the amount of heat insulating material can be reduced to approximately half of that of the conventional one, making it easier to store and, especially when stored on the inner wall surface of the frame, there is no need to consider the heat resistance of the heat insulating material itself.

Furthermore, as mentioned above, since the lower part of the outer pot is not overheated more than necessary, the temperature of the switch knob, etc., for example, is prevented from rising, and the operation thereof is not hindered.

[Brief explanation of drawings]

The drawing is a sectional view of the electric rice cooker of the present invention. 1...Frame, 2...Outer pot, 3...Heater,
5... Inner pot, 6... Insulation material, 7... Back cover.

Claims (1)

[Scope of utility model registration request] A cylindrical frame, a cylindrical outer pot with a bottom built into the frame, an inner pot configured to be freely stored in the outer pot, a heater provided at the bottom of the outer pot, and a heater provided at the bottom of the frame. A space formed at the bottom of the outer pot and a space formed between the heat insulating material and the outer pot or frame. An electric rice cooker characterized by having two parts connected to each other.