JP2006326038A - Pressure rice cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve safety during a failure without adding a new component. <P>SOLUTION: This pressure rice cooker comprises: a rice cooker main body 11 for housing a rice cooking pot 10; a lid body 26 attached to the rice cooker main body 11 so as to be opened and closed and provided with lid packing 64 for closing the opening inner peripheral part of the rice cooking pot 10; an exhaust path provided inside the lid body 26 and making the inside and outside of the rice cooking pot 10 communicate with each other; and pressure regulating valves 72 and 79 provided with a valve body for openably and closably closing a vent hole provided inside the exhaust path for pressurizing the inside of the rice cooking pot 10. In the pressure rice cooker, the lid packing 64 is provided with a depressurizing part 67 where a superimposing margin with the rice cooking pot 10 is not fixed and at least partially made shorter than the other part, or the lid packing 64 is provided with a depressurizing part 67 whose thickness is not fixed and at least partially made thinner than the other part. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a pressure rice cooker.

  Conventionally, a rice cooker includes a rice cooker body that accommodates a rice cooker and a lid that is attached to the rice cooker body so as to be openable and closable, and the rice cooker is heated by heating means disposed inside the rice cooker body. By doing this, the rice set in the rice cooker is cooked. Among them, the pressure rice cooker is provided with a pressure regulating valve having a valve body that closes the vent hole in the exhaust passage provided in the lid body, and the inside of the rice cooker is controlled to a predetermined pressure equal to or higher than the atmospheric pressure. Yes.

  Prior art document information related to the pressure rice cooker of the present invention includes the following.

JP 2000-93294 A

  Patent Document 1 describes a pressure rice cooker equipped with a pressure regulating valve having a valve body made of a single spherical member that can roll. The pressure rice cooker enables the spherical member to be moved by a solenoid, and an electromagnetic coil is disposed above the valve body, and the magnetic coil magnetic force is applied to the air hole by the spherical member based on the detection value of the pressure sensor. By adjusting the pressing force, multi-stage pressure control can be performed.

  However, this type of pressure rice cooker has a problem that when the cooked rice utensils block the vent hole of the exhaust passage, the inside of the rice cooker is abnormally pressurized. In addition, since the pressure rice cooker described in Patent Document 1 is equipped with a pressure sensor, when the pressure sensor detects an abnormal pressure increase, the heating means is stopped to reduce the pressure. In the state where this pressure sensor is out of order, abnormal pressure increase cannot be prevented. And when the inside of a rice cooking pot raises abnormally in this way, there exists a problem of opening so that a cover body may jump up.

  This invention is made | formed in view of the conventional problem, and makes it a subject to provide the pressure rice cooker which can improve the safety | security at the time of a failure, without adding a new component.

  In order to solve the above-mentioned problems, a first pressure rice cooker of the present invention includes a rice cooker body that houses a rice cooker, and a lid that is attached to the rice cooker body so as to be openable and closable and closes an inner periphery of the rice cooker. The rice cooker having a lid having packing, an exhaust passage provided in the lid for communicating the inside and outside of the rice cooker, and a valve body for closing and opening a vent hole provided in the exhaust passage In the pressure rice cooker provided with a pressure regulating valve that pressurizes the inside, the overlap with the rice cooker is not constant in the lid packing, and at least a part of the pressure cooker is made shorter than the other part. Yes.

Specifically, in the first pressure rice cooker, the decompression part is formed by providing a notch part.
Alternatively, the lid packing is made of an annular member having a uniform projecting length, and the decompression portion is a starting point region formed by inclining the lid packing downward from a predetermined starting point toward a facing position. Consists of.
Alternatively, the depressurizing portion includes a starting point region formed by forming the lid packing so that the protruding length becomes longer from a predetermined starting point toward the opposing position.

  Moreover, the 2nd pressure rice cooker of this invention is a lid which has the rice-cooker main body which accommodates a rice-cooking pan, and the lid packing attached to this rice-cooker main body so that opening and closing is possible, and obstruct | occluding the opening inner peripheral part of the said rice cooking pan. And an exhaust passage provided in the lid for communicating the inside of the rice cooker and the outside, and a valve body for closing and opening a vent hole provided in the exhaust passage for pressurizing the inside of the rice cooker. In the pressure rice cooker provided with a pressure valve, the lid packing is provided with a depressurization part in which the wall thickness is not constant and a part thereof is thinner than the other part.

  In these 1st and 2nd pressure rice cookers, when the inside of the rice cooker is abnormally pressurized, the depressurization part with a short overlap in the lid packing or the depressurization part with a thin wall thickness is the opening inner periphery of the rice cooker. Deforms outward from the part. Therefore, even if the vent of the exhaust passage is blocked for some reason or the pressure regulating valve malfunctions, even if the inside of the rice cooker is abnormally pressurized, the inside of the rice cooker is deformed by the deformation of the depressurization part in the lid packing. The pressure can be reduced, and the lid can be prevented from being opened so as to jump up. Therefore, the safety of the device can be increased.

  In these pressure rice cookers, it is preferable to provide the said decompression part in parts other than the front surface in the said rice cooker main body. If it does in this way, when the decompression part deform | transforms, it can prevent that the vapor | steam in a rice cooker is spouted with respect to the user with high possibility of being located in the front of a rice cooker fundamentally.

  The lid packing is disposed on an inner lid that is detachably attached to the lid body, and the inner lid and the lid body are preferably provided with positioning means for attaching to a preset position. . In this way, the inner lid that can be cleaned in a sanitary manner can always be mounted at a fixed mounting position, thus ensuring safety.

  In the pressure rice cooker of the present invention, when the inside of the rice cooker is abnormally boosted, the pressure in the rice cooker can be reduced by deformation of the depressurization part, and therefore it is possible to prevent the lid from being opened so as to jump up. Therefore, the safety of the device can be improved without adding new parts.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 and 2 show a pressure rice cooker according to a first embodiment of the present invention. This pressure rice cooker includes a rice cooker body 11 that detachably accommodates a rice cooking pot 10 that is electromagnetically heated, and a lid body 26 that is rotatably attached to the rice cooker body 11. The inner lid 59 is detachably attached.

  The rice cooker body 11 includes an exterior body including a cylindrical body 12, a bottom body 13 that closes a lower end opening of the body 12, and a shoulder body 14 that is attached to cover the upper end opening of the body 12. ing. The shoulder body 14 includes a circular opening 15 for detachably disposing the rice cooking pot 10 at the center thereof, and a cylindrical inner body 16 and a non-conductive body are formed below the opening 15. A protective frame 17 made of a material is disposed. An induction heating coil 18 that induction-heats the rice cooker 10 is disposed on the lower outer peripheral surface of the protective frame 17 via a ferrite core 19. Further, a rice cooker temperature sensor 20 for detecting the temperature of the rice cooker 10 is disposed through the protective frame 17. Further, the shoulder body 14 is provided with a hinge receiving portion 21 for attaching the lid body 26 so that the lid body 26 can be opened and closed on the back side, and a lock hole 22 for locking the lock portion of the lid body 26 on the front side. Yes. Furthermore, an operation unit including an operation board 23, a menu sheet 24, and a surface member 25 is provided on the upper front side of the shoulder body 14.

  The lid body 26 is attached to the hinge receiving portion 21 of the shoulder body 14 so as to be openable and closable, and closes the opening 15 of the rice cooker body 11, and constitutes an outer surface material together with the exterior body of the rice cooker body 11. A plate 27, a lower plate 32 that closes the bottom of the upper plate 27, and an inner lid 59 that is detachably attached to the lower surface of the lower plate 32 are provided. And the inside of this cover body 26 is provided with the 1st and 2nd exhaust passage which connects the inside of the rice cooking pot 10 and the exterior, and each raises the inside of the rice cooking pot 10 to atmospheric pressure or more in steps. First and second pressure regulating valves 72 and 79 are provided. Each exhaust passage merges into one on the exhaust (atmosphere) side, and a steam port unit 89 is detachably disposed at the outlet portion.

  The upper plate 27 is provided with a mounting hole 29 for rotatably mounting an operation member 28 for opening the lid 26 at the front. Further, an arrangement recess 30 for arranging the steam port unit 89 is provided on the back portion of the upper plate 27, and the connection port 31 is opened at the center thereof.

  As shown in FIGS. 1 to 3, the lower plate 32 has a shape corresponding to the concave depression shape on the upper side of the shoulder body 14. On the back of the lower plate 32, there is provided a hinge connecting portion 35 having a shaft 33 that penetrates the hinge receiving portion 21 of the shoulder body 14 and a hinge spring 34 for biasing the lid body 26 in the opening direction. It has been. In addition, a lock member 36 that can be unlocked and locked to the lock hole 22 of the shoulder body 14 is rotatably attached to the front portion of the lower plate 32. The lock member 36 is urged in the lock direction by a spring (not shown). Further, at the center of the upper portion of the lock member 36, an opening preventing lock piece 37 for preventing the opening of the lid 26 at the time of pressurization by operating a first solenoid 50 described later is provided. Further, a lid heater 39 is disposed on the bottom of the lower plate 32 via a metal heater cover 38, and a lid temperature sensor (not shown) is disposed. A packing 40 is provided on the outer peripheral portion of the heater cover 38 for hermetically sealing the space between the heater cover 38 and the inner cover 59. Furthermore, on the upper side of the lower plate 32, a metal reinforcing member 41 is disposed in order to prevent deformation due to heat and pressure during rice cooking.

  In the lower plate 32 of the present embodiment, first and second accommodating portions 42 that accommodate first and second pressure regulating valves 72 and 79 provided in an inner lid 59 described later adjacent to each other in the width direction. , 46, first and second solenoids 50 and 53, which are driving means for the pressure regulating valves 72 and 79, and a common exhaust part 56 where the first and second exhaust passages are joined.

  As shown in FIGS. 1 and 3, the first accommodating portion 42 constitutes a part of the first exhaust passage, and has a dome shape with a lower end opening that accommodates a first pressure regulating valve 72 described later. . A first drive opening 43 is provided in the front portion of the side wall of the first housing portion 42, and a packing 44 is disposed in the first drive opening 15. Further, in the heater cover 38, a position corresponding to the lower end opening of the first accommodating portion 42 is similarly opened, and a gap between them is sealed with a packing 45.

  As shown in FIGS. 2 and 3, the second accommodating portion 46 constitutes a part of the second exhaust passage, and has a cylindrical shape with upper and lower end openings for accommodating a second pressure regulating valve 79 described later. is there. The upper end of the second housing portion 46 is a second drive opening 47, and a packing 48 is disposed in the second drive opening 15. Further, in the heater cover 38, a position corresponding to the lower end opening of the second housing portion 46 is similarly opened, and a gap between them is sealed by a packing 49.

  A first pressing member 51 that presses the spherical member 78 through the packing 44 is disposed at the tip of a rod that advances and retreats depending on the presence or absence of energization, in the first solenoid 50 that is the first driving means. In the operating state, the rod is retracted by energization (ON), and the spherical member 78 of the first pressure regulating valve 72 is rolled by its own weight via the packing 44 to be in the pressurized (closed) state, while in the non-operating state. The rod is advanced by shutting off (off), and the spherical member 78 is rolled to be in a non-pressurized (open) state. The first pressing member 51 has a link member 52 that enters the lower portion of the lock member 37 for preventing the lock member 36 from being opened in the ON state and prevents the lid body 26 from being opened due to the rotation of the lock member 36. Is provided.

  A second pressing member 54 is disposed at the tip of a rod that advances and retreats depending on whether or not power is supplied to the second solenoid 53 that is the second driving means. The rod is retracted by energization (ON), and the spring receiving member 88 of the second pressure regulating valve 79 is lowered through the packing 48 and the vertical pressing member 55 to be in a high pressure state, while the rod is shut off (OFF). And the spring receiving member 88 is raised to a low pressure state.

  The common exhaust part 56 has a cylindrical shape with upper and lower end openings provided at positions corresponding to the connection ports 31 of the upper plate 27. A packing 57 for sealing between the upper plate 27 and a connecting portion 91 of a steam port unit 89 described later is disposed at the upper end opening of the common exhaust portion 56. Further, in the heater cover 38, a position corresponding to the lower end opening of the common exhaust portion 56 is similarly opened, and a gap between them is sealed by a packing 58.

  As shown in FIGS. 4 and 5, the inner lid 59 includes a metal inner lid body 60, a lid packing 64, and a resin frame 68. The inner lid body 60 includes a first pressure regulating valve 72 and a first pressure regulating valve 72. The two pressure regulating valves 79 are integrally attached.

  The inner lid main body 60 serves as a heat radiating plate, and a first opening 61 and a second opening 62 communicating with the inside of the rice cooker 10 are provided at positions corresponding to the accommodating portions 42 and 46. Yes. Further, on the outer peripheral edge of the inner lid main body 60, a mounting portion 63 that is folded back into a substantially inverted J-shaped cross section for mounting the resin frame 68 is provided.

  The lid packing 64 is provided with an attached portion 66 disposed in the attachment portion 63 of the inner lid main body 60 on the upper portion of an annular seal piece 65 that is in close contact with the inner periphery of the opening of the rice cooker 10. The seal piece 65 is provided with a depressurization portion 67 in which the overlap with the rice cooking pot 10 is not constant and a part thereof is shorter than the other part. In the present embodiment, the decompression portion 67 is formed by providing a cutout portion in a substantially half region, and the inner lid main body so that the decompression portion 67 is located on the rear side with respect to the inner lid 59. It is attached to 60 via a resin frame 68 described later. In the present embodiment, the overlapping margin of the seal piece 65 in the portion provided with the depressurizing portion 67 is set to about 7 mm, and the overlapping margin of the other portion is set to about 13 mm.

  The resin frame 68 is an annular member that can be mounted in the mounting portion 63 of the inner lid main body 60, and the mounting portion 66 of the lid packing 64 is sandwiched between the mounting portion 63 and the lid packing 64. Is attached to the inner lid body 60 so as not to be detached. The resin frame 68 is formed on the lower plate 32 on both the rear and front sides corresponding to the hinge connecting portion 35 of the lid 26 as positioning means for attaching the inner lid 59 to a preset position of the lid 26. Positioning portions 70a, 70b, and 70c corresponding to the positioning recess 69 are projected. A locking claw portion 71 that enables the locking member 36 to engage with the locking hole 22 and fixes the inner lid 59 in the mounted state is provided at the front center corresponding to the locking member 36 of the lid 26. It has been.

  As shown in FIGS. 1 and 5A, the first pressure regulating valve 72 is housed in a first valve seat member 73, a first cover 75 that covers the first valve seat member 73, and the inside thereof. It consists of a spherical member 78 that is a first valve body, and is accommodated in the first accommodating portion 42 when the inner lid 59 is attached.

  The first valve seat member 73 has a trapezoidal cylindrical shape with the upper end closed at the lower end opening, and a first vent hole 74 for exhausting the steam in the rice cooker 10 is provided at the center of the upper end closed surface. The first cover 75 covers a spherical member 78 and a first valve seat member 73, which will be described later, and the first pressing member 51 of the first solenoid 50 is inserted through the packing 44 so as to be able to advance and retract. An insertion hole 76 is provided. In addition, exhaust holes 77 are provided in the upper portion of the first cover 75 with a predetermined interval in the circumferential direction. The spherical member 78 is for increasing the pressure in the rice cooking pot 10 from 1.20 to 1.25 atm by closing the first vent hole 74 by rolling.

  As shown in FIGS. 2 and 5B, the second pressure regulating valve 79 includes a second valve seat member 80, a second cover, and a biased member that is a second valve body housed therein. 85 and a spring receiving member 88, and is accommodated in the second accommodating portion 46 by mounting the inner lid 59.

  The second valve seat member 80 has a cylindrical shape with a lower end closed at the upper end opening, and a second vent hole 81 is provided on the lower end closed surface. The second cover 82 covers the second valve seat member 80 in a state in which a biased member 85 and a spring receiving member 88, which will be described later, are accommodated. A side exhaust hole 84 provided in the portion is formed. The biased member 85 is biased downward by a spring 86 which is a biasing means, and a valve packing 87 is disposed at the lower end thereof. The valve packing 87 has a substantially conical shape that projects in a tapered manner toward the lower end, and is closed by fitting the conical portion into the second vent hole 81. The spring receiving member 88 is for positioning the upper end of the spring 86 to urge the biased member 85 downward. When the second solenoid 53 is driven (operated), the packing 48 and the vertical pressing member are provided. The biasing force for closing the second vent hole 81 by the biased member 85 is changed by being moved downward via 55.

  As shown in FIGS. 1 and 2, the steam port unit 89 includes a tray-like lower case 90, an upper case 92 that is detachably attached to the lower case 90, and a steam port packing 94 that seals between the cases. And is detachably connected to the common exhaust part 56 located at the back of the arrangement recess 30 via a packing 57. The lower case 90 is provided with a connecting portion 91 for connecting to the common exhaust portion 56 at a substantially central portion of the bottom wall thereof. The upper case 92 has an upper end closing surface that forms a curved surface integral with the upper plate 27 so as to match the surface shape of the lid body 26, and is detachably assembled to the lower case 90. is there. The upper case 92 is provided with a packing accommodating portion 93 that matches the side wall shape of the lower case 90, and a steam port packing 94 that seals between the cases 90 and 92 is disposed in the packing accommodating portion 93.

  As shown in FIG. 1, the lid body 26 includes a first valve seat member 73 having a first vent hole 74, a first cover 75 having an exhaust hole 77, a first cover 75 and a first housing portion. 42, the path between the inner lid body 60 and the heater cover 38, the common exhaust part 56, and the steam port unit 89 having an exhaust port communicates the inside of the rice cooker 10 and the outside. A first exhaust passage is configured.

  2, the second valve seat member 80 having the second vent hole 81, the second cover 82 having the upper exhaust hole 83 and the side exhaust hole 84, the second cover 82, and the second housing. The passage through the clearance between the inner lid main body 60 and the heater cover 38, the common exhaust portion 56, and the steam port unit 89 having an exhaust port communicates the inside of the rice cooker 10 and the outside. The second exhaust passage is configured.

  In the pressure rice cooker having the above-described configuration, rice cooking control and heat retention control are executed according to a preset program by a microcomputer mounted on a control board (not shown). And in rice cooking control, the non-pressurized state which made both the solenoids 50 and 53 into a non-operation state, the low pressurization state which made only the 1st solenoid 50 into an operation state, and both solenoids 50 and 53 into an operation state It is executed while performing three-stage pressure control in the high pressure state. Here, in this embodiment, the inside of the rice cooker 10 is in a pressurized state due to a failure of the solenoids 50 and 53, a malfunction of the rod, or the like by setting the solenoids 50 and 53 to a non-pressurized state. To prevent it from remaining. The first pressure regulating valve 72 also serves as a relief valve when the second pressure regulating valve 79 becomes inoperable due to some cause.

  In the pressure rice cooker configured in this way, the cooked rice utensils and the like may block the vent holes 74 and 82 of the exhaust passage, and in this case, the inside of the rice cooker 10 is abnormally pressurized. End up. In this case, the lock member 36 and the link member 52 of the lid body 26 may be destroyed, and the lid body 26 may be released so as to jump up.

  However, in the pressure rice cooker of the present embodiment, since the inner lid 59 is provided with the depressurization part 67 having a short overlap margin on the seal piece 65 that seals the opening inner peripheral part of the rice cooker 10, this depressurization part. When 67 deform | transforms toward an outer side, the pressure in the rice cooking pot 10 can be escaped outside, and it can reduce pressure.

  Specifically, when the pressure in the rice cooking pot 10 is increased, pressure is applied to the seal piece 65 of the lid packing 64 from the inner surface toward the outer side, so that the seal piece 65 and the inner peripheral surface of the rice cooking pot 10 are pressed against each other. Act on. When the inside of the rice cooker 10 is abnormally increased to a pressure higher than a preset value of 1.25 atm, the depressurized portion 67 formed by providing the notch portion is deformed outward, and the seal at that portion is released. The As a result, the pressure in the rice cooking pot 10 escapes from the depressurizing portion 67, and the inside of the rice cooking pot 10 is depressurized.

  Thereby, the lock member 36 and the link member 52 of the rice cooker 10 can be destroyed, and it can prevent opening so that the cover body 26 may jump up. Further, the inner lid 59 having the lid packing 64 is detachably attached to the lid body 26 so that it can be cleaned hygienically. The inner lid 59 is always mounted at a fixed mounting position by the positioning recess 69 and the positioning portions 70a to 70c. And in this attachment state, the said decompression part 67 is located in the back side of the cover body 26, and is made into parts other than the front in the rice cooker main body 11. FIG. Therefore, when the decompression part 67 deform | transforms, it can prevent that the vapor | steam in the rice cooker 10 is ejected with respect to the user with high possibility of being located in the front of a rice cooker fundamentally. Therefore, it is possible to improve the safety of the device without adding new parts.

  FIG. 7 shows a modification of the inner lid 59 of the first embodiment. This inner lid 59 is different from the above-described embodiment only in that a plurality of decompression portions 67 formed by notches are provided at a predetermined interval. Even if the inner lid 59 configured in this way is used, the same operations and effects as described above can be obtained.

  FIG. 8 shows a pressure rice cooker using the inner lid 59 of the second embodiment. The inner lid 59 of the second embodiment is particularly different from the first embodiment in that the sealing piece 65 of the lid packing 64 is constituted by an annular member that protrudes with the same thickness and a uniform length. is doing. The inner lid 59 is opposed to the sealing piece 65 of the lid packing 64 with the rear top as a starting point in a state in which the rice cooking pot 10 is closed by adjusting the protruding dimensions of the positioning portions 70a to 70c of the resin frame 68. It is comprised so that it may incline downward and to the front side top part which is. And the rear side origin area | region located in the uppermost side is comprised as the decompression part 67 similar to 1st Embodiment. In the second embodiment, the portion with the longest overlap is about 13 mm as in the first embodiment, and the shortest portion is set to about 7 mm.

  In 2nd Embodiment comprised in this way, like 1st Embodiment, the overlap margin of the sealing piece 65 of the lid packing 64 and the rice cooking pot 10 is not constant, and a part with a long overlap margin and a short part arise. . As a result, when the inside of the rice cooker 10 is abnormally pressurized, the depressurization part 67 having a short superposition allowance cannot be maintained due to deformation, and therefore the inside of the rice cooker 10 can be decompressed. As a result, the same operation and effect as in the first embodiment can be obtained.

  FIG. 9 shows a pressure rice cooker using the inner lid 59 of the third embodiment. The inner lid 59 of the third embodiment is the first in that the projecting length of the sealing piece 65 of the lid packing 64 is increased from the rear top to the front top that is the opposite position. This is particularly different from the embodiment. And the rear side origin area | region where a lower end edge is located in the uppermost side is comprised as the decompression part 67 similar to 1st Embodiment. In this third embodiment, the portion with the longest overlap is about 13 mm, which is the same as in the second embodiment, and the shortest portion is about 7 mm. It is comprised so that an effect can be acquired.

  FIG. 10 shows a pressure rice cooker using the inner lid 59 of the fourth embodiment. In the inner lid 59 of the fourth embodiment, the thickness of the seal piece 65 of the lid packing 64 is not constant, the rear half region is made thinner than the front region, and this thin portion is used as the decompression portion 67. It differs from the first embodiment in that it is configured. In addition, the sealing piece 65 of this embodiment is set so that the thickness of the thick portion is about 2 to 3 mm and the thickness of the thin portion is about 1 to 1.5 mm.

  In the fourth embodiment configured as described above, in the seal piece 65, the thin depressurizing portion 67 is easily elastically deformed, and the deformable range is large. As a result, as in the first embodiment, when the inside of the rice cooker 10 is abnormally pressurized, the thin-wall depressurization portion 67 cannot maintain the seal due to deformation, and therefore the inside of the rice cooker can be decompressed. As a result, the same operation and effect as in the first embodiment can be obtained.

  In addition, the rice cooker of this invention is not limited to the structure of the said embodiment, A various change is possible.

  For example, the configuration for changing the superposition allowance shown in the first to third embodiments and the configuration for changing the wall thickness shown in the fourth embodiment may be combined. It is possible to obtain a depressurizing action. Of course, the pressure at which the depressurization due to deformation is started can be adjusted by variously changing the material of the lid packing 64, the overlapping allowance, and the thickness.

It is a fragmentary sectional view showing the pressure rice cooker concerning a 1st embodiment of the present invention. It is a fragmentary sectional view which shows the state which cut | disconnected the other part. It is a perspective view which shows the cover body which removed the upper board. It is an upper perspective view of an inner lid. It is a downward perspective view of an inner lid. (A) is an expanded sectional view which shows a 1st pressure regulation valve, (B) is an expanded sectional view which shows a 2nd pressure regulation valve. It is a lower perspective view which shows the modification of the inner cover of 1st Embodiment. It is a fragmentary sectional view showing the pressure rice cooker concerning a 2nd embodiment. It is a fragmentary sectional view showing the pressure rice cooker concerning a 3rd embodiment. It is a fragmentary sectional view which shows the pressure rice cooker which concerns on 4th Embodiment.

Explanation of symbols

10 ... Rice cooker 11 ... Rice cooker body 18 ... Induction heating coil (heating means)
26 ... Lid 59 ... Inner lid 60 ... Inner lid body 64 ... Lid packing 65 ... Sealing piece 67 ... Depressurizing part 68 ... Resin frame 69 ... Positioning recess 70a-70c ... Positioning part 72 ... First pressure regulating valve 79 ... Second Pressure regulating valve 89 ... Steam port unit

Claims (7)

A rice cooker body containing a rice cooker;
A lid having a lid packing attached to the rice cooker body so as to be openable and closable, and closing an opening inner periphery of the rice cooker;
An exhaust passage that is provided in the lid and communicates with the outside of the rice cooker;
In the pressure rice cooker having a valve body that closes the vent hole provided in the exhaust passage so as to be openable and closable and pressurizing the inside of the rice cooker,
The pressure rice cooker, wherein the lid packing is provided with a depressurization portion in which the overlap with the rice cooking pot is not constant and at least a part is shorter than the other part.   The pressure rice cooker according to claim 1, wherein the depressurization part is formed by providing a notch part. The lid packing is an annular member having a uniform protruding length,
2. The pressure rice cooker according to claim 1, wherein the pressure-reducing portion includes a starting region by arranging the lid packing so as to be inclined downward from a predetermined starting point toward an opposing position.   2. The pressure rice cooker according to claim 1, wherein the pressure-reducing portion includes a starting region by forming the lid packing so that a protruding length increases from a predetermined starting point toward an opposing position. A rice cooker body containing a rice cooker;
A lid having a lid packing attached to the rice cooker body so as to be openable and closable, and closing an opening inner periphery of the rice cooker;
An exhaust passage that is provided in the lid and communicates with the outside of the rice cooker;
In the pressure rice cooker having a valve body that closes the vent hole provided in the exhaust passage so as to be openable and closable and pressurizing the inside of the rice cooker,
A pressure rice cooker characterized in that the lid packing is provided with a depressurization part whose thickness is not constant and part of which is thinner than the other part.   The pressure rice cooker according to any one of claims 1 to 5, wherein the decompression unit is provided in a portion other than the front surface of the rice cooker body.   The lid packing is disposed on an inner lid that is detachably attached to the lid body, and the inner lid and the lid body are provided with positioning means for attaching to a preset position. The pressure rice cooker according to any one of claims 1 to 6, characterized in that

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