JPH10248711A - Pressure type rice cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To quicken start, to cook uniform and soft rice, to enrich a pressure mechanism by housing and arranging a pressure release mechanism with sufficient strength inside a lid body and to shorten rice cooking required time in the rice cooker of a small capacity type. SOLUTION: This pressure type rice cooker is provided with a ring-like heater 5, a pot 7 heated by the heater 5 and the pressure release mechanism 21 provided on the lid body 16. Then, the ring diameter (B) of the heater is set larger than a dimension A (height dimension) from the inner bottom part to upper opening part peripheral edge of the pot, the heating area of a pot bottom is widened, a space in a horizontal direction inside the lid body 16 is taken large and the pressure release mechanism of the large strength and movable stroke is housed and arranged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure cooker for cooking rice by increasing the pressure in a pot.

[0002]

2. Description of the Related Art A pressure rice cooker has a pressure in a pot of 1.1.
The rice is cooked in a high pressure state of Kgf / cm ^2. However, since the rice is cooked in the high pressure state as described above, the thickness of each member including the pan is increased, and the pressure release mechanism is made of a material having high strength. Must be used. (JP-A-6-2271
No. 0, JP-A-6-46957) This pressure release mechanism requires a large installation space and the mechanism is complicated because of the above reasons.

[0003] In the rice cooker disclosed in the above-mentioned prior art, the size of each part and the arrangement of parts are determined based on a relatively large rice cooking capacity (one square), although not particularly specified in the gazette.

[0004] For this reason, there is ample room for installation of each component, and it is possible to install the components without difficulty. In addition, since the rice cooking capacity is large, the area of the bottom inside the pot becomes large, and the ring diameter of the heater is correspondingly increased. It is possible to increase the calorific value and increase the pressure rise speed in the pot to shorten the cooking time.

[0005] That is, the pan is rapidly heated by a large amount of heat generated, and a sudden rise in pressure in the pan by the pressure release mechanism accompanying the heating causes the cooked rice to be cooked uniformly and plump in a short time. Can be.

[0006] By the way, the electric rice cooker is generally divided into small-sized rice cookers according to the needs of consumers. There is a combination cooking, a single combination and a 3 combination cooking suitable for about 2 family members.

Conventionally, as for the cooking capacity of rice, as described above, the pressure in the pot is increased to shorten the cooking time and cook the rice to a plump rice, and the whole pot is heated by the induction heating method to uniformly cook the rice. And the improvement was made so that start-up may be quick.

[0008]

However, no satisfactory improvement has been made for a small-capacity battery. The specific reason is that when the capacity is small, the inner diameter of the pot is considerably small, so the internal space of the lid placed above it is also small, so that an effective pressure release mechanism cannot be incorporated and rice cooking Time cannot be reduced.
Similarly, since the inside diameter of the pot is small, the ring diameter of the heater is also small, so that a large amount of heat cannot be obtained and the rise is slow. In the induction heating method, the rice can be raised and the rice can be uniformly heated, but it is heavy and difficult to handle, and increases the cost, according to the outer diameter of the main body.

According to the present invention, the pot is flattened, the ring diameter of the heater is set larger than its height to obtain a large calorific value, the start-up is improved, and the bottom of the pot is enlarged to make it uniform and plump. By cooking rice and enlarging the inner diameter of the pot, a space for installing a pressure release mechanism is obtained.

[0010]

SUMMARY OF THE INVENTION The present invention comprises a frame,
A U-shaped storage case provided in the frame, a hot plate provided with a ring-shaped heater provided on the inner bottom of the storage case, and provided so as to be stowable in the storage case. A pot to be brought into contact with the hot plate, an inner lid which seals an upper opening of the pan and has at least a pressure regulating valve and a pressure relief valve, and a closed state of the pan which is provided above the inner lid and is closed by the inner lid. A lid having a pressure release mechanism for releasing the pressure, wherein a ring diameter of the heater is set to be larger than a dimension from an inner bottom portion of the pot to a peripheral edge of an upper opening.

Further, the inner diameter of the pot is set to be larger than the ring diameter of the heater.

Further, the pressure releasing mechanism is disposed within a range of an inner diameter of the pot in the lid.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an overall schematic sectional view of a pressure rice cooker according to the present invention, and FIG. 2 is an explanatory plan view of the same.

(1) a rice cooker main body, (2) a synthetic resin frame, (3) a U-shaped storage case made of metal provided in the frame (2), and (4) a storage case A ring-shaped sheathed heater (5) is housed in a dish-shaped hot plate provided on the inner bottom of the case (3), and a rising wall (6) extending upward is formed around the periphery. ing.

A pan (7) is provided so as to be freely housed in the storage case (3). The pan (7) has a large curved wall (8) formed on the periphery of the bottom and a flange (9) bent outward on the periphery of the upper opening. ).

The ring diameter (B) of the heater (5) is set to be larger than the dimension (A) from the inner bottom of the pot (7) to the periphery of the upper opening (upper part of the flange (9)). I have.

The ring diameter (B) of the heater (5)
The inner diameter (C) of the pot (7) is set large.

Accordingly, the respective diameters have a relation of A <B <C, and the pot (7) has a flat shape with a low height and a large ratio of the bottom area.

(10) An inner lid for sealing the upper opening of the pan (7), and a ball (11) for keeping the pressure in the pan constant.
A pressure regulating valve (12) having a pressure relief valve (13) that normally shuts off communication with the atmosphere and releases pressure in the pot to the atmosphere by an external operation, and an abnormally high pressure in the pot. A safety valve (14) that is sometimes opened is provided, and a packing (15) that is in close contact with the inner wall of the pan (7) is attached to the outer peripheral edge.

A lid (16) is provided above the inner lid (10) and forms a space (17) inside, and is openable and closable by pivotally supporting one side to the frame (2). Hook (18) provided on the stopper (1) on the frame (2) side.
9) can be hooked freely. Release of the hooked state of the hook (18) and the stopper (19) is performed by a lock button (20) provided on the frame.

(21) is the space (1) of the lid (16).
7) An operation button (22) facing the outer surface of the lid (16) with a pressure release mechanism for releasing the hermetically sealed state of the pot (7) provided inside.
And a seal packing (24) which is turned down by rotating the operation button (23) and is lowered by lowering of the operation plate (23). Accordingly, the upper end of the pressure relief valve (13) provided below the packing is pushed down to communicate the inside of the pot with the atmosphere.

The pressure release mechanism (21) is disposed in the space (17) of the lid (16) within the dimensions of the inner diameter (C) of the pan (7), as shown in FIG. I have.

The arrangement of the pressure release mechanism (21) will be described in more detail.
Occupies a lot of installation space in the lid (16) because it has many movable parts and is composed of many parts. However, the pan (7) is made flat and its height (A) is increased. By making the inner diameter (C) larger than that, the flat area of the lid (16) becomes wider even in a small-capacity rice cooker. As a result, a space large enough to install the pressure release mechanism (21) can be secured, and the thickness and the movable stroke of the components constituting this mechanism can be obtained.

(25) a thermosensitive element provided at the center of the hot plate (4); (26) a pot discharged from the pressure regulating valve (12), pressure relief valve (13) and safety valve (14) A steam outlet for releasing the internal pressure and steam to the atmosphere, and (27) is a hinge mechanism of the lid (16).

Next, the rice cooking operation will be described. The pot (7) containing rice and water is stored in the storage case (3), and the pot (7)
Is brought into contact with the upper surface of the hot plate (4).

On the other hand, the inner lid (10) is rotated in a state where it is mounted below the lid (16) by the peripheral member of the pressure regulating valve (12) in advance, and the hook (18) is stopped by the stopper (19).
Hang on.

As the lid (16) is hooked, the inner lid (10) is pushed down by the lower surface of the lid (16) to bring the packing (15) into close contact with the inner wall of the pot (7). In this state, each of the pressure regulating valve (12), the pressure relief valve (13), and the safety valve (14) is closed to block communication between the inside of the pot and the atmosphere.

When the heater (5) is energized, the temperature of the hot plate (4) becomes high and the bottom of the pan is heated.
Due to the large ring diameter of the heater (5), the entire bottom is heated extensively and the side of the pot (7) is actively heated by the rising wall (6). In this case, the temperature of the rising wall (6) rises quickly because the ring diameter of the heater (5) is large, and the pot is rapidly heated.

When the pressure in the pot rises with the progress of rice cooking, the packing (15) is further brought into close contact with the inner wall of the pot and the ball (11) is pushed up to adjust the pressure to a predetermined pressure.

If, for some reason, the lid (16) is opened in spite of the high pressure inside the pot, the operation button (22) is depressed and rotated to lower the operating plate (23). . With the lowering of the operating plate, the tip of the operating plate pushes down the seal packing (15) and the pressure relief valve (13)
, The pressure in the pot is released above the inner lid (10) and released to the atmosphere through the vapor discharge port (26).

When the depression of the operation button (22) is stopped when the pressure in the pan falls to the atmospheric pressure, the steam vent valve (13) and the spring of the operation plate (23), which are not shown, return the original position. Return to. Then, lock button (2
0) is operated to rotate the hook (18), the hook and the stopper (19) are released, and the lid (16) is opened.

[0032]

As described above, the present invention is to perform pressure cooking by increasing the internal pressure of the pot, and to heat the bottom of the pot with respect to the dimension from the inner bottom of the pot to the periphery of the upper opening. By setting the ring diameter large, the bottom area of the pan is relatively large and the whole is heated uniformly, as well as the storage space in the horizontal direction of the lid provided above the pan. A pressure release mechanism composed of movable parts, which has become wide and is considered to be difficult to mount on a small-capacity rice cooker, can be housed and arranged in the lid.

For this reason, the restrictions on the thickness and size of the components (movable parts) of the pressure release mechanism are reduced, and those having pressure resistance and deformation resistance can be used.

In particular, generally, in the case of a small-capacity rice cooker,
The area of the bottom of the pot becomes smaller, and as a result, the ring diameter of the heater also becomes smaller, the calorific value is naturally smaller, the rise is sharper, and the time required for cooking rice tends to be longer, but in the case of the present invention, the ring diameter of the heater is larger. As a result, the calorific value can be increased, the rise is quick, and the time required for cooking rice is reduced.

Further, since a heavy motor and heat radiating fins are not required unlike the induction heating type, the original small size and light weight of the small capacity rice cooker can be maintained.

Since the inner diameter of the pot is set to be larger than the diameter of the ring of the heater, the heat of the heater can sufficiently heat the center of the bottom of the pot and the ring diameter of the heater can be sufficiently increased. It becomes larger than the height dimension, so that not only the bottom part but also the side parts of the pot can be heated, so that the whole pot can be heated in a well-balanced manner.

[Brief description of the drawings]

FIG. 1 is an overall schematic sectional view of a pressure rice cooker of the present invention.

FIG. 2 is an explanatory plan view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rice cooker main body 2 Frame 3 Storage case 4 Hot plate 5 Heater 7 Pot 10 Middle lid 12 Pressure adjustment valve 13 Pressure release valve 16 Lid 21 Pressure release mechanism

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Akio Hogimoto 3-201 Minamiyoshikata, Tottori City, Tottori Prefecture Inside Sanyo Electric Co., Ltd. (72) Inventor Hiroaki Tanaka 3-201 Minamiyoshikata, Tottori City, Tottori Sanyo Tottori Inside the corporation

Claims (3)

[Claims] 1. A frame and a U provided in the frame.
Storage case, a hot plate provided on the inner bottom of the storage case and containing a ring-shaped heater, and a pot provided in the storage case so as to be freely storable and allowing the outer bottom to contact the hot plate during storage. And an inner lid that seals the upper opening of the pan and has at least a pressure regulating valve and a pressure release valve, and a pressure release mechanism that is provided above the inner lid and releases the closed state of the pan with the inner lid. A pressure rice cooker comprising: a lid; and a ring diameter of the heater is set to be larger than a dimension from an inner bottom portion of the pot to a periphery of an upper opening. 2. The pressure rice cooker according to claim 1, wherein the inner diameter of the pot is set to be larger than the ring diameter of the heater. 3. The pressure releasing mechanism according to claim 1, wherein the pressure releasing mechanism is disposed within a range of an inner diameter of the pot in the lid.
2. A pressure rice cooker according to claim 1.