JPS607611Y2 - rice cooker - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rice cooker that prevents soft boiling over in a direct heating type rice cooker.

Conventionally, there are two types of electric pots: an indirect heating method in which the bottom of the pot is heated by a heater through water, and a direct heating method in which the pot is brought into contact with the heater or directly heated by steam from the heater.

It is well known that, compared to indirect heating methods, direct heating methods tend to boil over the outside of the pot when the amount of water is increased to achieve a soft finish. .

For this reason, in the past, as a first example, the lid was made with a double structure to guide the soft material between the lids, and as a second example, a steam release cutout was formed at the lower opening edge of the single-layer lid to prevent the rapid expansion of the soft material. As a third example, steam vent holes were formed in the top wall of the single-layer lid.

However, the structure of the lid in the first example is complicated, and the lid in the second example is easily deformed due to the notch.
Furthermore, the third example had the disadvantage that when the soft material was accidentally blown out from the steam vent hole, it spread over the entire top surface of the lid and caused noticeable stains.

This invention was made to eliminate the above-mentioned large song,
The purpose is to provide a rice cooker which can have a simple single-lid structure, prevent deformation of the lid, and reduce the extent of dirt on the lid due to its softness.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows the basic structure of a direct heating type rice cooker.

In this FIG. 1, reference numeral 1 denotes an inner frame disposed within an outer frame 2 via a heat insulating material 3, and approximately at the center of the inner bottom of the inner frame 1 is a well-known heat sink where the outer bottom of a pot 4 is pressed. A dynamic switch 5 (detailed illustration is omitted) is provided, and is configured to be set and operated by an operating lever 6.

A heater 7 is arranged at the inner bottom of the inner frame 1 so as to heat the bottom and outer circumference of the pot 4 with hot air or radiant heat.

Now, as also shown in FIG.
0 is integrally formed in a rising shape.

Reference numeral 11 denotes a single-layered lid that opens and closes the open upper end portion 8 of the pot 4, and has a shape bordered by an outer circumferential annular wall 12 extending downward, and rests on the stepped portion 9 of the lid. The contacting lower edge has an inwardly curved curl forming part 13.
is formed.

The outer circumferential annular wall 12 is formed to have a smaller diameter than the flange 10.

Therefore, when the lid 11 is in the closed state, its outer annular wall 12 faces the flange 10 of the pot 4 from the inside with a gap therebetween.

Reference numeral 14 denotes a plurality of steam vent holes, for example, six (generally 4 to 8), which face the flange 10 and are adjacent to the curl forming portion 13 at their upper edges (generally speaking, they are located upwardly). They are formed on the outer circumferential annular wall 12 of the lid 11 at equal intervals in the circumferential direction.

In this case, the diameter of the steam vent hole 14 is approximately 3.5 mm,
The height H1 of the curl forming part 13 is approximately 31rr! The height H2 from the lower end surface of the n1 outer circumferential annular wall 12 to the center of the steam vent hole 14 is set to approximately 5rlrIn.

According to the above structure, since the steam vent hole 14 is provided in the lid 11, it is possible to suppress the rapid expansion of the soft rice during cooking, and thus it is possible to prevent the soft rice from boiling over.

By the way, as a result of cooking rice at a water level about 4 to 5 minutes higher than the specified water level, almost no boiling over occurred outside the flexible pot 4.

On the other hand, even if highly viscous soft air bubbles are accidentally blown out from the steam vent hole 14 in the form of balloon-like air bubbles, the air bubbles will contact the inner surface of the flange 10 of the pot 4 and burst, and the softness and The softness gradually blown out from the steam vent hole 14 is retained between the flange 10 and the outer circumferential annular wall 12, and gradually permeates between the flange 10 and the curl forming part 13 and returns into the pot 4. .

At this time, the steam blown out from the steam vent hole 14 flows directly upward along the inner surface of the flange 10 above the soft material, so that the soft material accumulated on the lower inside of the flange 10 is not blown up by the steam, and the soft material is removed from the outside of the flange 10. This prevents the product from being blown out.

Therefore, the dirt on the lid 11 due to the softness is limited to the outer annular wall 1 at most.
The stain is limited to two areas and is not noticeable.

On the other hand, with conventional lids in which a plurality of steam venting cutouts are intermittently formed on the lower edge of the outer circumferential annular wall of the lid, steam is blown into the soft material blown out from the steam venting cutouts. This has the disadvantage that the softness bubbles and spills from the upper end of the flange onto the outer frame.

However, in this embodiment, the steam vent hole 14 is located at the curl forming part 13.
Since it is located above, even if the soft material stays in the lower part inside the flange 10, steam will not be blown into the soft material, and it is possible to reliably prevent the soft material from boiling over.

Moreover, a large number of steam vent holes 14 are provided in the outer circumferential annular wall 12 of the illumination.
Although it is formed into a shape, the curl forming part 13 that acts as a reinforcement is curved inward in this part, so
The gap formed between the flange 10 and the outer circumferential annular wall 12 is not narrowed by the curl forming part 13 below the steam vent hole 14, in other words, the steam vent hole 14 is formed within the gap.
It is possible to prevent the lid 11 from deforming while ensuring a sufficient amount of softness that can be located below the lid 11 and retained therein.

Of course, since the lid 11 has a single-layer lid construction, its construction is also simple.

As described above, the present invention can provide a rice cooker of a direct heating type that can prevent soft boiling over with a simple structure, make stains on the lid less noticeable due to the softness, and prevent the lid from deforming.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional side view showing an embodiment of the present invention, and FIG. 2 is an enlarged longitudinal sectional view of the main parts thereof. In the figure, 4 is a pot, 7 is a heater, 8 is an open upper end, 9 is a step, 10 is a flange, 11 is a lid, 12 is an outer annular wall, 13
1 is a curl forming part, and 14 is a steam vent hole.

Claims (1)

[Scope of utility model registration request] A pot that is directly heated by a heater and a lid that can open and close the open upper end of the pot,
A flange is formed in a rising shape on the periphery of the stepped portion of the upper part of the pot on which the lid is placed, and a flange is formed in a diameter smaller than the flange so as to extend downwardly around the periphery of the lid, and is placed on the stepped portion. an outer circumferential annular wall that forms a gap with the flange when the outer circumferential annular wall A rice cooker comprising a plurality of steam vent holes formed circumferentially in adjacent upper portions.