JP2865493B2 - Pressure cooker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double lid pressure cooker such as an electric pot or an electric jar rice cooker.

[0002]

2. Description of the Related Art A general so-called pressure cooker is disclosed in
The pot is covered with a single lid as in Japanese Patent Application Laid-Open No. 4-110455, and the engaging portion is sealed by packing. In addition, when the pressure inside the pot becomes abnormal pressure due to foreign matter closing the pressure regulating valve or the pressure regulating valve for releasing the pressure more than necessary in the pot into the outside air as appropriate and maintaining the pressure at a predetermined pressure, And a safety valve is provided to communicate between the inside of the pot and the outside air. Since such pressure cookers are originally designed to perform only pressure cooking, they are not frequently used, so the cost of the exterior of the main unit is increased because it is stored in a kitchen storage or cabinet and taken out for cooking each time it is used. The appearance is not refreshing. Therefore,
As described above, the lid only needs to be single, and the pressure regulating valve and the safety valve are exposed on the outer surface.

[0003] However, the so-called jar rice cooker is colored on the outside of the inner lid that covers the pot so that the rice cooker is always placed on a kitchen rack or a dining table, especially for meals. There is a synthetic resin outer lid with a double lid configuration to match the kitchen.

[0004] Even when cooking is performed by applying pressure to the jar rice cooker having the double lid structure, the above-mentioned pressure regulating valve and safety valve are provided on the inner lid, but the following problems arise because the outer side is covered by the outer lid. Occurred.

[0005]

It is necessary to provide holes for passage of steam discharged from the pressure regulating valve and the safety valve in the outer lid, and there is a disadvantage in that the appearance of the lid body is impaired. Further, in a case where the steam discharged from the safety valve is guided to the steam vent provided in the lid body facing above the pressure regulating valve so as to be released from the steam vent, the steam released from the safety valve when the safety valve is operated is quickly discharged. However, there was a problem in that the lid body could not be released into the outside air, had a problem in terms of safety, and a large amount of hot steam hit the back surface of the lid body to thermally deform the lid body.

According to the present invention, in a pressure cooker having a double lid structure, steam released from a pressure regulating valve through one steam outlet provided at a specified position of a lid body and steam released from a safety valve are removed. In addition to the quick release into the outside air, the user opens and closes the lid body and operates the operating device at the same position.

[0007]

According to the present invention, there is provided a pot body for storing a pot, and an opening of the pot is covered, and the inside of the pot and the outside air are always communicated with each other so as to cook at normal pressure or shield the inside of the pot from the outside air. A lid provided with a switching valve for performing pressure cooking, and an operating device provided above the lid for operating the switching valve, and one side is pivotally connected to the pan body and the other side is hooked to the pan body. A freely movable lid body, a pressure regulating valve provided at a central portion of the lid and having a steam vent hole and maintaining the inside of the pan at a predetermined pressure, and communicating between the inside of the pan and outside air when the inside of the pan is at a certain pressure or higher. A safety valve, a latching device provided in proximity to the operating device of the lid main body to hold the lid main body in a closed state, and a space provided between the lid and the lid main body provided on the pivot portion side of the lid main body. And a steam outlet which is open above the safety valve in communication with the steam vent of the pressure regulating valve.

[0008]

[0009]

[Function] During normal pressure cooking, if the pressure in the pot is more than necessary, the pressure regulating valve is activated and released from the pressure regulating valve, and the steam is separated from the steam in the space between the lid and the lid body. Release to outside air from outlet. When the pressure in the pot is abnormally high, the safety valve is activated, and the high-pressure steam discharged from the safety valve is rapidly discharged from the steam outlet to the outside air.

The operating device communicates between the inside of the pot and the outside air depending on the type of cooking and cooks under normal pressure or shields and cooks under pressurized condition. It is provided close to, so that the user can open and close the lid body and operate the operation device at the same position.

[0011]

An embodiment of the present invention will be described with reference to the drawings. 1 is a partial cross-sectional view of a pressure cooker according to the present invention, FIG. 2 is an external perspective view of the same cooker main body, FIG. 3 is an operation explanatory cross-sectional view of a switching valve during normal-pressure cooking, and FIG. It is operation | movement explanatory sectional drawing of a valve.

First, the pot body (1) will be described.
Reference numeral (2) denotes a bottomed cylindrical frame made of synthetic resin, provided with a pivoting portion (3) on one side and closing a lid body (20) described later on an upper portion on the other side facing the pivoting portion. A latching device (4) for maintaining the state is provided. This latching device (4) is composed of a latching button (6) whose one end protrudes from the frame (2) and whose other end is urged toward the lid body by a spring (5). (7) a side frame provided in the frame (2) and having an upper portion fixed to an upper peripheral edge of the frame;
(8) is a bottom frame connected to the lower portion of the side frame, (9) is an induction heating coil serving as a heat source provided below the bottom plate, (1)
0) a pan provided with a flange (11) on the upper peripheral edge and housed inside the side frame (7) and the bottom frame (8); (12)
Is a thermosensitive element provided so as to be able to protrude and retract from the center of the bottom frame (8), and (13) rotates a cooling fan (14) for cooling the coil (9) provided below the bottom frame (8). motor,
(15) is a support for fixing the motor (13), (1)
6) is a display window provided on the upper part of the frame (2) close to the hook button (6), (17) is a display substrate provided behind the display window, and (18) is an electric component (not shown). Wiring board with. (19) is a cord reel provided below the support table (15).

Subsequently, a lid body (20) pivotally attached to the pan body (1) and a lid (2) covering an opening of the pan (10).
1) will be described. The lid (21) has a packing (22) fixed to the outer peripheral edge thereof and a flange (1) of the pan (10).
Seal between 1). (23) is a predetermined pressure (1.1K) provided in the center of the lid (21) and suitable for cooking in the pot.
gf / cm ² ), a valve seat (25) having a steam vent hole (24) for communicating the inside of the pot with the outside air, and a steam outlet (48) which is engaged with the upper part of the valve seat and which will be described later. ), A valve cap (27) having a discharge hole (26) opened toward the opposite side, and a ball (28) housed in the valve cap and closing the steam vent (24) by its own weight. ing. (29) is separated from the pressure regulating valve (23) by the lid (2).
1) A safety valve which is attached to 1) and is normally in a closed state.
0) is activated when the pressure inside the pot is equal to or higher than a predetermined pressure higher than a predetermined pressure, thereby communicating the inside of the pot with the outside air. The safety valve (29) is a valve box (31) having a pressure relief hole (30).
A valve rod (33) housed in the valve box and a valve rod (33) housed in the valve box (31) and urged by the spring (32) to always close the passage from above.
It is composed of A switching valve (34) is attached to the lid (21) at a distance from the pressure regulating valve (23), and always communicates with the inside of the pot and the outside air for normal pressure cooking or pressure cooking by shutting off the inside of the pot and outside air. Is what you do. The switching valve (34) includes a spring (35) and a valve stem (36) for closing the passage from below by the spring.

The lid body (20) is provided above the lid (21) and has one side pivotally supported by the pivoting part (3) so as to be openable and closable. A space (S) is formed therebetween, and the lid body is constituted by the following members. (37) is a synthetic resin upper plate, (3)
8) a lower plate which forms an empty space (39) apart from the upper plate;
(40) is a heat sink fixed to the lower surface of the lower plate, (41) is a lid heater tightly fixed to the upper surface of the heat sink, (42)
Is an operation hole formed in the upper plate (37), (43) is fixed to the lower plate (38), and the latching device (4) in the empty room is provided.
An operating device for the switching valve (34) provided in close proximity to the rotating body (44) and penetrates the center of the rotating body, the tip of which faces the upper end of the valve rod (36) and the upper end of which is the upper plate ( 37) a switching button (45) protruding from outside and moving up and down by an external operation, and the rotating body (44) is provided with the switching button (45).
The stop position of the switching button is held by the up and down movement of. That is,
The switching button (45) is held in the raised position by the rotating body (44) to close the switching valve (34) to block the inside of the pot and the outside air, and the lowering position by the rotating body (44). And the switching valve (34) is opened to selectively hold the normal-pressure cooking position where the inside of the pot and the outside air are always communicated.
Reference numeral (46) denotes a hook lever provided in the empty chamber (39) for releasing the hooking state with the pot body (10) by the pressing pressure of the hooking button (6). Although the operation is not shown in detail, the switching button (45)
Is in a lowered position (a state in which the inside of the pot communicates with the outside air), so as to cooperate with the rotating body (44) so as to prevent the lock with the pot body (10) from being released. Reference numeral (48) denotes a steam outlet which penetrates through the upper plate (37) and the lower plate (38) and is open on the side of the pivot (3) above the safety valve (29).

The steam outlet (48) is connected to the safety valve (29), the pressure regulating valve (23). The switching valve (34) is separated in this order, and the switching valve (34) is the most separated.

This means that when the switching valve (34) is opened, the largest amount of steam is released and the steam is long in the space (S) to separate the steam from the neats. In the case where the pressure is temporarily released from the pressure regulating valve (23) due to excessive pressure during pressure cooking, the steam in the released steam is separated from the steam. This is because the safety valve (29) takes into consideration conditions such as quickly releasing the pressure steam in the pot (10) without hitting the lower plate (38) of the lid body (3) when an abnormality occurs.

Next, the operation will be described. No pressure is required when cooking at normal pressure such as porridge to prevent spillage during boiling. In the case of performing the normal-pressure cooking, rice and a large amount of water are put into the pot (10) to cook the rice by communicating the inside of the pot (10) with the outside air. This operation will be described. As shown in FIG. 3, the switching button (45) is pressed to push down the switching valve (45) against the spring (35), and the pan (10) is used to hold this depressed state by the rotating body (44). The inside is always in communication with the outside air via the space (S). Here, the pot (10) itself is heated by the eddy current generated by energizing the coil (9) to heat rice and water.

Eventually, even if the temperature in the pot (10) becomes high and the porridge progresses and steam is generated in the pot, this steam is always discharged from the passage of the switching valve (45) and is passed through the space (S). The air is discharged from the outlet (48) to the outside air. As described above, in the case of the rice porridge, the inside of the pot and the outside air continuously communicate with each other, and the steam always passes through a large portion of the space (S) and the steam outlet (4).
8) It is released into the outside air. In normal-pressure cooking, more steam is released from the safety valve (29), but the steam (S) is released before this steam is released from the steam outlet (48).
The steam is separated from the steam through a wide range, and the steam is stored on the upper surface of the lid (21), and the steam is discharged from the steam outlet (48), so that the steam does not flow into the outside air.

Of course, the steam vent (2) of the pressure regulating valve (23)
Since the passage (area) of each of 4) and the safety valve (29) is smaller than the switching valve (34), the pressure regulating valve (23)
The safety valve (29) does not open.

Subsequently, when shortening the cooking time and cooking delicious rice, the inside of the pot and the outside air are shut off and the rice is put into a pressure state and cooked. After putting rice and water in (10), the switching button (45) is pressed again as shown in FIG.
The switching valve (34) is pulled up by 5) to close the passage, and this state is maintained by the rotating body (44) and the pan (10)
Is put in a closed state, and the coil (9) is energized to start cooking rice. When the temperature in the pan (10) rises with the rise in the temperature of the pan (10) and the pressure of the pan (10) becomes a predetermined pressure (1.1 kgf / cm ² ) higher than a preset atmospheric pressure, The ball (28) is pushed up by the internal pressure to open the steam vent hole (24) and release more pressure than necessary through the discharge hole (26). At this time, the pot (1
Although the steam in 0) is also discharged, the steam discharged from the discharge hole (26) temporarily stays in the flow space (S) toward the side opposite to the steam outlet (48) to generate steam and waste water. After the separation, the steam is discharged from the steam outlet (48), and the ash collects on the upper surface of the lid (21). As the pressure in the pan (10) decreases, the ball (28) descends and closes the steam vent (24) again to maintain the inside of the pan (10) at a predetermined pressure. By maintaining the inside of the pot at a predetermined pressure in this manner, water is rapidly penetrated into the rice grains, and heat is rapidly conducted into the rice grains to cook the rice in a short time.

Thus, in order to check the amount of cooked rice and to insert the ingredients for the cooked rice, the lid body (20) is used during the pressure cooking.
To open the pan, the switching button (45) is pressed to depress the switching valve (34) and opened to weaken the pressure in the pan through the space (S) to reduce the steam flow farther than the switching button (45). Release from outlet (48). Thereafter, the hook button (6), which is located close to the switching button (45), is pressed to move the hook lever (46) to release the hook state with the lid body (20).

Further, when the pressure regulating valve (23) is blocked by foreign matter during the pressure cooking and the inside of the pot becomes abnormal pressure, the safety valve (29) is operated and the pressure in the pot (10) sharply increases. It is released from the steam outlet (48) to ensure safety. At this time, steam is rapidly released from the steam outlet (48).
The steam outlet is located at the lid body (2) farthest from the user's position.
There is no danger because it is provided on the pivot side of 0).

[0023]

As described above, according to the present invention, one surface of the lid main body is provided.
Since two steam outlets are provided, the appearance of the lid body is not impaired, and the steam outlet is communicated with the pressure regulating valve through a space, is provided above the safety valve, and is provided on the side of the lid body pivotally connected to the safety valve. Because of this, the steam flowing out of the pressure regulating valve is separated from the ash by the space and then released from the steam outlet, and the high-pressure steam flowing out of the safety valve in the event of an abnormal condition quickly reaches the outside air from the steam outlet without hitting the back of the lid body. Since it is released inside, it is safe, and thermal deformation of the lid body can be prevented. In addition, an operating device of a switching valve for performing normal-pressure cooking by always communicating the inside of the pot with the outside air or performing pressure cooking by shielding the inside of the pot and the outside air is provided on the lid body, and each of the operating device and the latching device is provided. Since it is provided close to the lid main body, the user can operate in the same position and in a comfortable posture.

[0024]

[Brief description of the drawings]

FIG. 1 is a partial sectional view of a pressure cooker according to the present invention.

FIG. 2 is an external perspective view of the cooking device main body.

FIG. 3 is a sectional view for explaining the operation of the switching valve during normal-pressure cooking.

FIG. 4 is a sectional view for explaining the operation of the switching valve during pressure cooking.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pot main body 4 Hook device 10 Pot 20 Lid main body 21 Lid 23 Pressure regulating valve 24 Steam vent hole 29 Safety valve 48 Steam outlet S space

────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Isamu Yamazaki 3-201 Minamiyoshikata, Tottori City, Tottori Prefecture Tottori Sanyo Electric Co., Ltd. (72) Inventor Norio Yamane 3-201 Minamiyoshikata, Tottori City, Tottori Prefecture Tottori Sanyo Electric Co., Ltd. (72) Inventor Fujio Sakaguchi 3-201 Minamiyoshikata, Tottori City, Tottori Prefecture Tottori Sanyo Electric Co., Ltd. (56) References JP-A-57-49420 (JP, A) (58) Field (Int.Cl. ⁶ , DB name) A47J 27 / 08,27 / 09

Claims (1)

(57) [Claims] At least one of a pan body for accommodating a pan, an opening portion of the pan, and an inside of the pan is always communicated with the outside air to perform normal pressure cooking or pan.
A lid provided with a switching valve for performing pressure cooking by shielding inside and outside air, and an operating device provided above the lid and operating the switching valve
A lid body having one side pivotally connected to the pan body and the other side freely hookable to the pan body, and a steam vent hole provided at a central portion of the lid to maintain the inside of the pan at a predetermined pressure. A pressure regulating valve, a safety valve for communicating between the inside of the pot and the outside air when the inside of the pot is equal to or higher than a predetermined pressure, and a latch provided close to the operating device of the lid body to hold the lid body in a closed state. And a steam outlet which is provided on the pivot portion side of the lid body, communicates with a steam vent hole of the pressure regulating valve through a space between the lid and the lid body, and is located above the safety valve and opened. Pressure cooker.