JPS5929608Y2 - rice cooker - Google Patents

Description

[Detailed description of the invention] This invention is a rice cooking method in which a heating space is formed around the outer periphery of a pot, and the pot is heated by radiant heat from a heater placed in this space and convection of air within the space. Concerning vessels.

Electric rice cookers have two methods: a pot is removably placed on top of a hot plate with an electric heater, and the heat from the electric heater is transferred from the hot plate to the bottom of the pot to cook rice; There is a method in which a space is provided for cooking rice, a heater is placed within this space at a predetermined distance from the pot, and the pot is heated by radiant heat from the heater and convection of air within the space to cook rice. .

However, in the former method, the upper part is often cooked in a crumbly state with little moisture, and the lower part is often cooked in a sticky state with a high moisture content, resulting in uneven cooking and a loss of flavor.

On the other hand, the latter method has the advantage that the cooking tastes better because it can heat the food evenly from almost the entire outside of the pot.

However, with this method, when storing the pot, the bottom cannot be placed on it, so the flange formed on the upper opening edge must be placed in a suspended state. Seven lunges were placed on the upper opening edge of the inner case.

This results in a metal-to-metal bond, and when used for a long period of time, the joint surfaces between the two will wear out due to the rotation of the pan, resulting in high costs when replacing parts.

The present invention was devised in view of the above circumstances, and it prevents wear on the inner case and pot so that it can withstand long-term use. It also reduces the number of parts, simplifies the structure, and improves strength. The aim is to increase the

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

In the figure, 1 is a substantially cylindrical metal outer case with open top and bottom surfaces, and 2 is a bottomed cylindrical metal inner case disposed inside this outer case with a heat insulating material 3 interposed therebetween, and the upper end thereof. The edge of the opening is fixed to a ring 4 made of heat-resistant plastic fitted to the upper end of the outer case 1 with screws 5.

There is a concave groove 3 on the top surface of the ring 4 to catch dew over the entire circumference.
1 and a projecting wall 32 that projects slightly upwardly from the upper opening edge of the inner case 2 is formed inside the projecting wall 32.
A plurality of convex portions 33 are formed inwardly.

Reference numeral 6 denotes a bottom plate having support legs 7, which are fitted and fixed to the lower end of the outer case 1.

Reference numeral 8 denotes a metal pot having an outward facing flange 9 formed on the upper opening edge, and a projecting wall 3 formed with this flange as a ring 4.
By placing it on the upper surface of the convex portion 33 of No. 2, it is arranged in a suspended state within the inner case 2.

A space 10 surrounded by the case 2 is formed around the outer periphery of the pot 8, and this space continuously faces the outer bottom surface and the outer surface of the pot 8.

A heater 11 is bent into a predetermined shape and placed in the space 10, and is held at the inner bottom of the inner case 2 at a predetermined distance from the pot 8 by an insulator 12 and a presser fitting 13. There is.

A thermostat 14 is disposed at the inner bottom of the inner case 2, and its upper surface is pressed against the outer bottom surface of the pot 8.

15 (d) A heat shield plate placed below the outer bottom of case 2,
A heat insulating material 16 is held on its upper surface.

17 is a hinge member 18 fixed to the upper end of the outer case 1
The outer lid is made of heat-resistant plastic and is rotatably attached to the lid, and a handle portion 19 for carrying is provided on the top surface.

Reference numeral 20 denotes an inner cover, which is fixed to the inner surface of the outer lid 17 via a heat insulating material 21.

A holding member 22 is located on the opposite side of the hinge member 18 and is fixed to the upper end of the outer case 1. When the outer lid 17 is closed, a hook 23 provided on the handle portion 19 engages with the holding member 22. The retaining portion 24 is fixed.

The engaging portion 24 is integrally formed with the ring 4, and one of the convex portions 33 is formed adjacent to the engaging portion.

25 is a push button for releasing the engagement between the hook 23 and the engaging portion 24.

Reference numeral 26 denotes a heat radiation plate fixed to the lower surface of the inner cover 25, and a heat-retaining heater 27 is disposed on the upper surface thereof.

Reference numeral 28 denotes an inner lid whose outer peripheral edge is placed on the flange 9 of the pot 8 and covers the upper opening of the pot 8.

Reference numeral 29 denotes a steam venting part fixed to the outer cover 17 and inner cover 25 so as to pass through them, and the lower part fits into an opening formed in the inner cover 28 via a packing 30 so as to communicate with the inside of the pot 8. It has become.

According to the embodiment of the present invention having the above configuration, the flange 9 of the pot 8 is placed on the convex portion 33 formed on the ring 4 made of heat-resistant plastic, so that even when the pot 8 rotates, the flange 9 does not remain metal. Since it is connected to plastic, the wear of the flange 9 is extremely low, and the wear is mainly on the ring 4 side, so when replacing parts, you only need to replace the ring 4 as necessary.
Replacement of B item becomes cheaper and easier.

In this regard, in the conventional case where the flange 9 of the pot 8 is placed on the upper opening edge of the metal inner case 2, both wear out in the same way and both need to be replaced.
This is extremely expensive and troublesome.

Further, a plurality of convex portions 33 are formed on the protruding wall 32 formed on the ring 4.
Since the flange 9 of the pot 8 is placed on this convex portion, a small gap communicating with the outside is formed between the lower surface of the upper opening edge of the pot 8 and the upper surface of the ring 4. Since the air in the space 10 is released to the outside through this small gap, the air inside the space 10
The advantage is that the convection of the heated air within the chamber is very good.

Furthermore, in this embodiment, the ring 4 has an engaging portion 24 and a convex portion 3.
3 are integrally formed, the assembly work is easy, and at least one of the convex parts 33 on which the flange 9 formed at the upper opening edge of the pot 8 is placed is brought close to the engaging part 24. Because of this, the strength in the vicinity of the retaining portion 24 is significantly increased, and a reinforcing plate or the like is not required, so the configuration can be simplified.

As explained above, the present invention prevents wear caused by rotation of the pot by placing the upper end of the pot on the plurality of convex parts formed on a ring made of heat-resistant plastic, and allows the pot to be used for a long time. In addition, since at least one of the convex portions is integrally formed close to the engaging portion where the hook engages, the strength near the engaging portion is significantly increased, and a reinforcing plate or the like is provided. This eliminates the need for this feature, reduces the number of parts, and simplifies the configuration.

[Brief explanation of the drawing]

Figure 1 is a front view showing a cross-section of the main parts of a rice cooker showing an embodiment of the present invention, Figure 2 is an enlarged cross-sectional view of the main parts, and Figure 3 shows the outer lid opened and the pot removed. It is a perspective view of a state. In the figure, 1' is an outer case, 2 is an inner case, 4 is a ring, 8 is a pot, 9 is a flange, 10 is a space 1, and 3 is a convex part.

Claims (1)

[Scope of utility model registration request] The upper opening edge of the inner case is fixed to a heat-resistant plastic ring fixed to the upper part of the outer case, and a pot is stored and installed in the inner case, and the ring has seven lunges formed at the upper opening edge of the pot. The plurality of protrusions to be placed and the hook provided on the outer lid integrally form a retaining part with which the metal engages when the lid is closed, and at least one of the protrusions is placed close to the engaging part. A rice cooker made of