JP2000014546A - Pressure cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify cleaning and to improve the airtightness of an inner lid by reducing a projecting member at the upper surface of the inner lid. SOLUTION: A pressure relief valve 16 with a valve function for adjusting pressure in a pot, a pressure relief function by external operation and an automatic pressure relief function automatically relieving pressure in the pot at need is provided at an engaging body 7 fixed to the inner lid for freely attachably and detachably attaching the inner lid 3 to an outer lid 27.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure cooker in which an inner lid for covering a pot is detachably mounted.

[0002]

2. Description of the Related Art When cooking or cooking rice while increasing the pressure in a pot, moisture and soup stock sufficiently penetrate into the cooked food, so that cooking can be completed in a short time.

[0003] However, when cooking is performed by increasing the pressure in the pot, when the pressure in the pot becomes higher than necessary, the pressure regulating valve is opened to open the pot and communicates with the atmosphere. When the pot is not operated for some reason, the inside of the pot becomes high pressure and it is dangerous. If it becomes high pressure, the safety valve is opened to open the pot and communicates with the atmosphere. In (2), a pressure relief valve for communicating the inside of the pot and the atmosphere by forcibly operating a user from the outside is required. These valves are attached to an inner lid detachably provided on the lower surface of the outer lid as seen in JP-A-6-46957.

[0004]

However, in the above-mentioned prior art, since the pressure regulating valve, the pressure relief valve, and the safety valve are provided at different positions on the upper surface of the inner lid, mounting on the inner lid is troublesome. At the same time, the inner lid is originally configured to be detachable for washing with water, but there is a drawback that it is difficult to wash at the time of washing because many valves are formed on the upper surface of the inner lid.

[0005] Especially, since the tongue accumulates on the upper surface of the inner lid, the tongue penetrates into the periphery of each valve and is difficult to wash.

Since the valves are separately mounted as described above, it is necessary to form a plurality of steam holes corresponding to the valves. In other words, the number of valves closing the holes increases. In other words, there are many places where the airtightness is sufficiently performed, which causes cooking mistakes due to pressure leak unlike the normal pressure cooker.

The present invention makes it possible to wash water while keeping the inner lid detachable, simplifying the cleaning of the upper surface of the inner lid when washing with water, and minimizing failures in maintaining the airtightness of the inner lid. There is no pressure cooking to do.

[0008]

SUMMARY OF THE INVENTION The present invention comprises a frame,
A pot provided so as to be freely housed in the frame, an inner lid covering an upper portion of the pot and having an engaging body provided on an upper surface, and an outer lid having an inner lid detachably mounted by the engaging body. In the combination, when the inside of the pot is equal to or higher than a predetermined pressure, when the operation button provided on the outer lid is operated, or when any of the cooking is completed, the inside of the pot and the atmosphere are exchanged. It is provided with a pressure relief valve communicating therewith.

The engaging body is provided at the center of the upper surface of the inner lid.

A steam vent is provided at the center of the upper surface of the outer lid, and a steam guide cylinder is provided which communicates with the steam vent and extends vertically above and below the outer lid. At the lower part, a catcher held by the engaging body is provided,
On the other hand, a steam hole is provided in the inner lid, and the steam hole is opened and closed by the pressure release valve, and the engaging body is provided with pressure steam discharged from the pot when the steam hole is opened by the pressure release valve. A diffusion guide for diffusing into the space between the outer lid and the inner lid is provided.

Further, a drive plate is provided in the outer lid, the drive plate being operated by a drive motor which is operated when the operation button is operated and after the cooking is completed, and which operates the pressure relief valve.

In addition, the engaging body is provided with a safety valve which is provided separately from the pressure relief valve and which operates when the inside of the pot is at an abnormally high pressure to communicate the inside of the pot with the atmosphere.

[0013]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a partial side sectional view illustrating an electric rice cooker as one embodiment of the pressure cooker of the present invention, FIG. 2 is a partially enlarged view of FIG. 1, and FIG. FIG. 4 is a partially enlarged view of FIG. 3; FIG. 5 is a partially sectional view of a case where the pressure release valve is opened by a drive motor after completion of cooking; FIG. 6 is a partially enlarged view of FIG. FIG. 7 is an enlarged sectional view of the engagement body.

[0014] (1) is a frame, (2) is a pot for accommodating foods provided in the frame so as to be freely stored, and (3) is provided with steam holes (4) and (4) in a central portion thereof and has a peripheral portion. An inner lid attached with a ring packing (6) closely attached to the upper peripheral edge of the pot has an engaging body (7) projecting upward at the center of the upper surface.

The engaging member (7) will be described in detail with reference to FIG. (8) is an outer case made of synthetic resin provided with an engaging projection (9) on the upper outer peripheral wall, and provided with insertion holes (10) and (11) on the side and a hooking wall (12) on the inner side. On one side of the lower part, a diffusion guide (13) for the pressure steam is formed between the upper part of the inner lid (3) and the lower part, and the elevating rod (14) operates on the other side of the lower part when the inside of the pot is at an abnormally high pressure. And a safety valve (15) for communicating the inside of the pot with the atmosphere is provided.

A pressure relief valve (16) is provided inside the engagement body (7), and is provided with an operating rod (17) provided vertically movably and having a valve body (18) fixed at a lower part thereof; And a receiving plate (20) forming a steam passage (19) between the operating rod and the operating rod, and an outer peripheral edge fixed to a lower portion of the receiving plate and having an outer peripheral edge of the steam hole (4). The contact plate (21) closely contacting the periphery of the operating rod (17) and the receiving plate (2)
0) and the valve body (18) is always in contact with the plate (2).
A first spring (22) biased to closely contact 1),
It is stretched between the hanging wall (12) and the receiving plate (20), and the receiving plate (20) and the pressing plate (21) are constantly pushed down to place the pressing plate (21) around the steam hole (4). A second spring (23) to be brought into close contact with, and a パ -shaped packing (24) inside the outer case (8) and surrounding the upper part of the operating rod (17).
And the insertion hole (1) located above the ∩-shaped packing.
1) and a transmission pin (26) having a pointed end (25) at the upper part protruding from the upper surface of the outer case (8).

The operating rod (17) is connected to a first spring (2).
When the second spring (2) is pushed down against
3) There is no change, and when the pressure in the pot exceeds a predetermined pressure, the valve body (18) pushes up the operating rod (17) against the second spring (23) to open the steam hole (4). I do.

(27) is an outer lid on which the inner lid (3) is detachably mounted on the lower surface. One side is pivotally supported on the frame (1) by a hinge (28), and the other side is pivotally supported. Hang on.

The outer lid (27) will be described in detail with reference to FIG. (29) is provided with a steam vent (30) in the center of the upper surface, and the pressure relief valve (1) is provided on the front side remote from the steam vent.
6) An outer plate provided with an operation button (31), (32) is provided below the outer plate, and a rubber catcher (33) for holding the engaging projection (9) is provided at a lower portion. Inner plate, (3
4) is a steam guide cylinder which communicates with the steam vent (30) and extends vertically above and below the outer lid (27), and (35) and (35) are provided on opposite side walls of the steam guide cylinder (34). The fixed elastic cap (36) is a drive plate whose both ends penetrate the side wall of the steam guide tube (34) and are located in the elastic caps (35) and (35). And a step groove (39) projecting downward from both sides thereof, and slides left and right by an external operation.

In a normal state in which the point (25) of the transmission pin (26) enters the stop groove (37), the operating rod (17) is stationary and the valve body (18) is in the steam hole (4).
When the operation button (31) is operated, the drive plate (36) slides to the right in the drawing (common to all drawings), the operating rod (17) is pushed down, and the valve body (18) is moved to the steam port. Release (4).

After the cooking is completed, the driving plate (36) slides to the left side of the drawing (common to all drawings) by the driving motor to be described later, and the operating rod (17) is similarly pushed down, so that the steam hole (4).
To release.

A transmission plate (40) has one end rotatably supported on the upper surface of the inner plate (29) by a shaft (41). The transmission plate is disposed below the operation button (31) and has a free end. The rotation forms a pressing portion (42) which is shifted to the right side of the drawing.
(43) and (44) are guide plates fixed to the upper surface of the inner plate (32), (45) is one side of which is applied to the pressing portion (42) with a slight distance, and the other side is the drive unit. A slide plate applied to an elastic cap (35) on one side of the plate (36),
Guided by the guide plate (43).

A drive motor (46) fixed to the upper surface of the inner plate (32) is operated after the completion of cooking by the output of a microcomputer or the like (not shown) to rotate a cam (47) provided at a lower portion. (48) is applied with one side slightly apart from the elastic cap (35) on the other side of the driving plate (36);
The other side is a rocking plate connected to the cam (47), and is guided by the guide plate (44).

(49) is a hook device for hooking the outer lid (29) to the frame (1).

Next, the operation will be described. During rice cooking, when the operation button (31) is not operated and the drive motor (46) is not driven, the drive pin (36) is at the center position as shown in FIGS. The tip (25) of (26) enters the stop groove (37), the operating rod (17) rises by the urging force of the first spring (22), and the valve element (18) comes into contact with the abutment plate (21). Thus, the vapor hole (4) is closed.

During cooking rice, when the pressure in the pot rises and reaches a predetermined pressure or more, as shown in FIG.
The valve body (18) is pushed up against the spring (23) to open the steam hole (4), and the inside of the pot and the atmosphere are passed through the steam hole (4) and the steam passage (50) below the diffusion guide (13). 7 and flows as indicated by the arrow in FIG. 7, passes through the space (S) (see FIG. 1) between the inner lid (3) and the outer lid (27), and passes through the steam guide cylinder (34).
The pressure is reduced by exhausting from the steam vent (30) through the air outlet, but when the pressure is reduced to a predetermined pressure, the receiving plate (20) is pushed down by the urging force of the second spring (23), and the plate (21) is moved through the steam hole ( 4) closely adheres to the periphery of the valve body, and as a result, the valve element (18)
Down to close the steam vent (4).

Thereafter, pressure cooking is performed while opening and closing the steam hole (4) in this manner and maintaining the inside of the pot at a predetermined pressure.

If, for some reason, the user opens the lid (27) during cooking, despite the high pressure inside the pot, it is necessary to release the pressure inside the pot. in this case,
Pressing the operation button (31) as shown in FIGS. 3 and 4,
By rotating the transmission plate (40), one side of the slide plate (45) is pressed rightward in the drawing by the pressing portion (42). Due to this pressing, the other side of the slide plate (45) is driven by the drive plate (3).
6) is pressed rightward in the drawing to release the stop groove (37) from the pointed end (25), and the step (39) pushes down the transmission pin (26) against the first spring (22) to depress the valve body ( 1
8) is separated from the abutment plate (21) and communicates with the steam hole (4), the steam passage (19) and the insertion hole (10) to release the pressure in the pot to the atmosphere as indicated by the arrow in FIG.

When the rice cooking is completed, the pressure in the pot generally does not drop rapidly and the lid (27) cannot be opened. However, in the present invention, a microcomputer (not shown) is used at the time when the rice cooking is completed. The drive motor (46) is driven by the output of (1) to release the pressure in the pan and open the lid (27).

The driving of the driving motor (46) causes the cam (47) to rotate as shown in FIGS.
8) is pressed to the left in the drawing. The step (38) of the drive plate (36) pushes the pointed end (25) of the transmission pin (26) by the movement of the rocking plate to push down the operating rod (17) against the first spring (22), As described above, the valve body (1
8) is separated from the abutment plate (21) to communicate the steam hole (4), the steam passage (19) and the insertion hole (10) to release the pressure in the pot to the atmosphere as shown by the arrow in FIG.

[0031]

As described above, the present invention provides an inner lid which is detachably attached to an outer lid by means of an engaging body. Since the inside of the pot and the atmosphere communicate with each other when the operation is performed and after the cooking is completed, the number of members (valve mechanism) protruding from the upper surface of the inner lid is minimized, and cleaning is easy. At the same time, the number of hermetically sealed portions of the valve portion is reduced, and pressure leakage can be prevented.

In particular, when the inner lid is mounted on the outer lid by the engaging body, there is no restriction on the mounting position of the inner lid, and the inner lid can be easily mounted.

That is, when many members stand on the upper surface of the inner lid, there is a restriction on the insertion position of each member with respect to the outer lid. In the case of one of the engaging bodies, it is sufficient to simply engage the engaging body with a predetermined portion of the outer lid.

Further, since the engaging body is provided at the center of the upper surface of the inner lid, when the engaging body is engaged with the outer lid, the inner lid is naturally held at a predetermined position and the close contact with the pot is ensured.

Since the engaging member of the inner lid is provided with a diffusion guide for diffusing the pressure vapor discharged from the pot into the space between the outer lid and the inner lid, the pressure vapor discharged from the pressure release valve is provided. Is not directly discharged from the steam vent and is separated into steam and neva in the space.

Further, since a driving plate is provided in the outer lid to operate the pressure release valve by being driven by an operation button and a driving motor which is operated after the completion of cooking, the components are shared to prevent the occurrence of a failure. In addition, assemblability and mechanism reliability can be improved.

In addition, the engaging body is provided with a safety valve that is provided separately from the pressure release valve and that operates when the inside of the pot is at an abnormally high pressure to communicate the inside of the pot with the atmosphere. The safety valve that operates as a safe safety device is secured separately from the pressure release valve to ensure safety, while the safety valve is installed in the engaging body to simultaneously control accuracy confirmation and adjustment as a unit together with the pressure release valve. be able to.

[Brief description of the drawings]

FIG. 1 is a side partial sectional view illustrating an electric rice cooker as an embodiment of the pressure cooker of the present invention.

FIG. 2 is a partially enlarged view of FIG. 1;

FIG. 3 is a partial cross-sectional view when the pressure release valve is opened from the outside.

FIG. 4 is an enlarged view of a main part of FIG. 3;

FIG. 5 is a partial cross-sectional view when the pressure release valve is opened by a drive motor after cooking is completed.

6 is an enlarged view of a main part of FIG. 5;

FIG. 7 is an enlarged sectional view of the engagement body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Frame 2 Pot 3 Inner lid 7 Engagement body 13 Diffusion guide 15 Safety valve 16 Pressure release valve 27 Outer lid 30 Steam vent 31 Operation button 33 Catcher 34 Steam guide cylinder 46 Drive motor

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Masami Fukumoto 3-201 Minamiyoshikata, Tottori-shi, Tottori F-term (reference) in Sanyo Electric Co., Ltd. 4B055 AA08 CA01 CA19 CA24 CA25 CA67 CA68 CB04 CB08 CB13 CB27 CC29 CC30 CC58 CD58

Claims (5)

[Claims] 1. A frame, a pot provided so as to be housed in the frame, an inner lid covering an upper part of the pot and having an engaging body provided on an upper surface, and an inner lid detachably mounted by the engaging body. An outer lid is provided, and the engaging body is activated when the inside of the pan is at a predetermined pressure or higher, when an operation button provided on the outer lid is operated, or after cooking is completed. A pressure cooker provided with a pressure relief valve that sometimes communicates the inside of the pot with the atmosphere. 2. The pressure cooker according to claim 1, wherein the engaging body is provided at a central portion of an upper surface of the inner lid. 3. A steam vent port is provided at the center of the upper surface of the outer lid, and a steam guide cylinder is provided in communication with the steam vent port and extending vertically above and below the outer lid. The lower portion is provided with a catcher held by the engaging body, while the inner lid is provided with a steam hole, and the steam hole is opened and closed by the pressure release valve. 2. The pressure cooker according to claim 1, further comprising a diffusion guide for diffusing pressure steam discharged from the pot when the steam hole is opened into the space between the outer lid and the inner lid. 4. A driving plate which is driven by a driving motor which operates at the time of operation of an operation button and after the completion of cooking and which operates the pressure release valve is provided in the outer lid.
A pressure cooker according to claim 1. 5. The safety device according to claim 5, wherein the engagement body is provided with a safety valve which is provided separately from the pressure release valve and which operates when the inside of the pot is at an abnormally high pressure to communicate the inside of the pot with the atmosphere. The pressure cooker according to claim 1.