JP3346913B2 - Commercial rice cookers - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a commercial rice cooker using an electromagnetic induction heating coil as a heat source.

[0002]

2. Description of the Related Art An electromagnetic induction heating rice cooker heats a rice cooker located above a coil corresponding to an electromagnetic induction heating coil by Joule heat due to eddy current. Generally, as the rice cooking container, a magnetic container made of iron, SUS430 stainless steel, or the like is widely used. Recently, a magnetic material such as iron or SUS430 stainless steel plate is attached to an aluminum container by brazing or the like, or a heat generating layer of a magnetic material such as iron is provided by thermal spraying to improve the handleability.

[0003]

However, the diameter of the container is 4
For a commercial rice cooker as large as about 50 mm, it is very difficult to uniformly heat the whole and it is required to improve its performance. Conventionally, in order to solve this uniform heating performance, an exhaust fan is provided at the top of the rice cooker, and the exhaust air is forcibly exhausted by the fan (for example, Japanese Patent Publication No. 6-59).
261 and JP-A-4-5921). However, when the air is forcibly exhausted, the temperature of the upper portion of the rice cooker is lower than that of the lower portion, and it is difficult to keep the whole rice cooker uniform.

Accordingly, the present invention aims to improve the rice cooking performance by uniformly heating a rice cooker in this commercial rice cooker.

[0005]

According to the present invention, an electromagnetic induction heating coil and a rice cooker are provided in a storage case, and the cooker is heated by Joule heat of the coil. An aluminum or aluminum alloy container is used for the rice cooker, a heating layer is provided at the bottom of the rice cooker, a lid is provided at the top, a handle supporting the rice cooker, a door is provided at the front of the storage case, and a rice cooker is provided.
A sensor that is located on the outer bottom and is
And the sensor goes down when the door is opened further
And the steam outlet of the storage case is provided at substantially the same height as the lid of the rice cooker.

[0006]

The water in the rice cooker heated by electromagnetic induction is released as steam from the lid of the rice cooker. The released steam rises as it is without being immediately discharged and is stored in the upper portion of the storage case, thereby heating the upper portion of the rice cooker. Thereafter, the steam is discharged from a steam outlet provided at substantially the same height as the lid of the rice cooker. By filling the upper part of the storage case with water vapor, the temperature distribution of the whole rice cooker becomes uniform, and delicious rice is cooked.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS.

FIG. 1 shows the overall configuration of a commercial rice cooker. Rail-type supports are provided on both left and right sides in a storage case 7 made of a heat insulating structure, and a rice cooker 1 is placed on the support 5. Of the rice cooker 1 can be freely moved back and forth. A door 8 for opening and closing the opening and an operation panel 9 are provided on the front surface of the storage case 7, and the rice cooking conditions can be set by operating the operation panel 9. The sensor 10 is provided at a lower portion of the outside of the rice cooker 1 and is configured to be lowered when the door 8 is opened, and to be raised when the door 8 is closed and to be in close contact with the bottom surface of the rice cooker 1. Reference numeral 11 denotes a lid for closing the upper opening of the rice cooker 1.

Next, FIGS. 2 and 3 are cross-sectional views of main parts of a commercial rice cooker, 1 is a rice cooker, which is made of aluminum or aluminum alloy, and whose lower outer peripheral surface and bottom have iron, 13Cr, And a heat generating layer 2 made of a ferrite material such as 18Cr stainless steel. A handle 4 is provided on the outer periphery of the upper part of the rice cooker 1 so that the rice cooker 1 can be installed on a support 5 in a box 7 of a heat insulating structure.
Reference numeral 3 denotes an electromagnetic induction heating coil, which uniformly heats the bottom of the rice cooker 1. Reference numeral 6 denotes a steam outlet provided on the back of the storage case 7 having substantially the same height as the lid 11. This outlet 6
May be the side surface of the storage case 7.

In the above configuration, the rice cooker 1 is heated by the heating coil 3 in the heat generating layer 2 below the container, and the rice and water inside the rice cooker 1 are heated. At this time, some of the water becomes steam and is released from the lid 11. The released water vapor is stored in the upper portion of the storage case 7 so as not to be immediately released to the outside of the storage case 7 and heats the upper portion of the rice cooker 1. Thereafter, the steam is discharged to the outside through the steam discharge port 6 of the storage case 7 provided at the same height as the lid 11 of the rice cooker 1. As a result, the whole rice cooker 1 is uniformly heated, and delicious rice is cooked. In this case, if the steam discharge port 6 is provided above the lid, the steam is immediately discharged to the outside, and a sufficient effect cannot be obtained. If the discharge port 6 is provided below the lid 11, water vapor is condensed inside the storage case 7 to generate water droplets, causing problems such as corrosion of the storage case 7 such as rust.

[0011]

According to the present invention, the steam outlet provided in the storage case is provided at the same height as the lid of the rice cooker so that the steam is stored in the upper part of the case. The rice cooker is heated to a high temperature, and as a result, it is possible to obtain a commercial rice cooker capable of cooking delicious and uniform rice.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a main part of a commercial rice cooker according to the present invention.

FIG. 2 is a sectional view of a main part of the commercial rice cooker of the present invention.

FIG. 3 is a top sectional view of the commercial rice cooker of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rice-cooking container 2 Heating layer 3 Electromagnetic induction heating coil 4 Handle 5 Support part 6 Steam outlet 7 Storage case 11 Lid

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-218411 (JP, A) JP-A-52-115692 (JP, U) JP-A-60-173233 (JP, U) JP-A-51-1 79591 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A47J 27/14-27/18 A47J 27/00

Claims (1)

(57) [Claims] 1. An industrial rice cooker in which an electromagnetic induction heating coil (3) and a rice cooker (1) are provided in a storage case (7), and the rice cooker (1) is heated by Joule heat of the coil (3). In the above rice cooker (1), a container made of aluminum or an aluminum alloy is used, a heating layer (2) is provided at the bottom of the rice cooker (1), and a lid (1) is provided at the upper part.
1), a handle (4) for supporting the rice cooker (1), and a storage case.
Door (8) in front of sauce (7) and outside of rice cooker (1)
Sensor located on the bottom surface and close to the outer bottom surface (10)
And when the door (8) is opened, the sensor
(10) is lowered, and the steam outlet (6) of the storage case (7) is connected to the lid (1) of the rice cooker (1).
A rice cooker for business use, wherein the rice cooker is provided at substantially the same height as in 1).