JP2009268803A - Pressure cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To ensure operation linked with change in internal pressure of an inner pot and to ensure that a lid 22 is not released when the pressure is higher than prescribed one. <P>SOLUTION: In the inner lid 38 attachably/detachably arranged in a part opposing an inner pot 10 in the lid 22, or in the heater cover 25 with a lid heater 26 arranged therein, there is installed a stopper member 52 that operates on a pressure inside the inner pot 10 when the inside of the inner pot 10 reaches a prescribed pressure higher than the atmospheric pressure and that stops the unlocking operation of a structural member of a lid opening/closing mechanism. Thus, the release of the lid 22 is inhibited where the pressure inside the inner pot 10 is elevated higher than the atmospheric pressure. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a pressure cooker.

  A rice cooker, which is one of the cookers, includes a main body that houses an inner pot and a lid that is attached to the main body so as to be openable and closable, and heats the inner pot by heating means disposed inside the main body. The rice cooked in the inner pot is cooked. In addition, this type of rice cooker is provided with a sealing means for closing the vent hole of the exhaust passage so as to be located in the exhaust passage so that the inner pot can be pressurized to a pressure higher than the atmospheric pressure. There is a built-in pressure rice cooker.

  And in this pressure rice cooker, when the lid is configured to be openable in a state where the inner pan is pressurized, the lid opens vigorously when the user unexpectedly performs an opening operation. Vapor may spout. Therefore, in this type of pressure rice cooker, in the state in which the inside of the inner pot can be pressurized to a pressure higher than atmospheric pressure, the lock member of the lid engaged with the main body moves in the disengagement direction, or the lock member There is provided a moving member (lock mechanism) for disabling the operation of the unlocking operation part that moves the lever in the disengagement direction.

  However, this pressure rice cooker also serves as a drive means for the sealing means as a drive means for the moving member. Therefore, in order to balance the inner pressure of the inner pot with the atmospheric pressure, the inner pressure of the inner pot is higher than the atmospheric pressure immediately after releasing the sealing of the inner pot by the sealing means. Therefore, since the user can open the lid immediately after the completion of cooking, immediately after the user stops cooking, or immediately after the rice cooking is terminated (interrupted) due to a power failure, reliable safety is ensured. It cannot be said that measures are taken.

  Therefore, when the inner lid that seals the upper end opening of the inner pot is movably disposed on the lid, and the inside of the inner pot is raised to a pressure higher than atmospheric pressure, the inner lid is moved upward by that pressure to the moving member. A pressure cooker is provided in which the moving member cannot be moved in the state where the internal pressure of the inner pot is increased by being locked, and the lock of the lid cannot be released (see Patent Document 1). .

  Alternatively, a segment for displaying the word “pressure” is provided on the liquid crystal display panel. When the inner pot is higher than the set pressure (1.05 atm), the pressure segment is turned on. Turn off the light. Also, if a power outage occurs during cooking, if the inside pan is pressurized immediately before the power outage, the pressure segment will blink until the waiting time for the inside pan to drop below the set pressure has elapsed. A pressure rice cooker is provided in which the pressure segment is turned off when the standby time elapses (see Patent Document 2).

JP 2008-48767 A Published technical report 2008-501203

  However, the pressure cooker of Patent Document 1 is provided with a packing for sealing the upper end opening of the inner pot on the inner lid, and therefore does not operate unless the inner pot becomes high pressure due to its contact resistance. Incidentally, in this patent document 1, in order to return to the state before the operation (locking) after the operation of the inner lid, a spring is provided. When the urging force of the spring is strong, contact resistance between the packing and the inner pot is added, so that the inner pot does not operate unless the pressure is increased to an extremely high pressure. On the other hand, when the biasing force of the spring is weak, the inner lid cannot be returned to the state before the operation against the contact resistance between the packing and the inner pot. Therefore, the operation according to this configuration is extremely unstable and is extremely difficult to realize. Moreover, even if it can be realized, since the inner lid is configured to be movable with respect to the lid body, when the lid body is closed, the inner lid is closed in a state of being inclined with respect to the inner pot, There may be a situation where the upper end opening of the seal cannot be sealed.

  Moreover, in the pressure rice cooker of patent document 2, although the time required for the pressure drop in an inner pot changes with the maximum pressure which can be sealed with a sealing means, and the actual pressure at the time of stopping rice cooking, it sets beforehand. It is necessary to wait until the waiting time (1 minute) has elapsed. For this reason, it is almost possible to ensure safety, but it also includes an inconvenience because unnecessary waiting time is included. In addition, when the user unexpectedly operates the unlocking operation unit without confirming the pressure segment, there is a possibility that the lid will open vigorously and the internal steam will be ejected.

  The present invention has been made in view of conventional problems, and operates reliably in conjunction with changes in the internal pressure of the inner pot, and can reliably prevent the lid from being opened when the pressure is higher than a predetermined pressure. It is an object to provide a simple pressure cooker.

  In order to solve the above-mentioned problem, a first pressure cooker according to the present invention includes a main body having an inner pot that accommodates an object to be heated, a heating unit that is disposed in the main body and heats the inner pot, A lid that is openably and closably attached to the main body, closes the inner pot, provided in the lid, an exhaust passage that communicates the inside and outside of the inner pot, and provided in the lid, A lock member having an engaging claw portion that engages and disengages with the receiving portion, and is moved from the retracted position to the advanced position to move the lock member in the engagement releasing direction by operating the lock releasing operation portion. A lid opening / closing mechanism having a structural member including a moving member for preventing movement, and a sealing means provided so as to be positioned in the exhaust passage and capable of pressurizing the inner pot by closing the exhaust passage And the inner pot sealed by the sealing means from atmospheric pressure A pressure cooker having a pressurizing means for pressurizing to a high pressure, wherein an inner lid for sealing the upper end opening of the inner pot is detachably disposed at a portion of the lid facing the inner pot. The lid is provided with a stopper member that operates at the pressure in the inner pan when the inside of the inner pan is boosted to a predetermined pressure higher than atmospheric pressure, and prevents the unlocking operation of the constituent members of the lid opening / closing mechanism. It is configured such that the lid cannot be opened in a state where the inside is increased to a pressure higher than the atmospheric pressure.

  Further, in the second pressure cooker of the present invention, in the pressure cooker in which a heater cover for disposing a lid heater is disposed on a portion of the lid facing the inner pot, the heater cover includes the inner cover. When the inside of the pan is raised to a predetermined pressure higher than the atmospheric pressure, a stopper member is provided that operates at the pressure in the inner pan and prevents the unlocking operation of the constituent members of the lid opening / closing mechanism, The lid body cannot be opened in a state where the pressure is increased to a high pressure.

  These pressure cookers do not move the inner lid in conjunction with the inner pressure of the inner pan, but are provided with a dedicated stopper member on the inner lid or heater cover. The stopper member can be reliably operated in a low pressure state lower than the maximum possible pressure. As a result, the unlocking operation of the constituent members of the lid opening / closing mechanism can be prevented in a state where the pressure in the inner pot that needs to prevent the user from opening the lid is higher than the atmospheric pressure.

  Further, it is possible to eliminate the urging member that returns the stopper member to the state before the operation. Furthermore, since the inner lid does not need to be movable with respect to the lid body, the upper end opening of the inner pot can be reliably sealed. Moreover, since the stopper member is directly linked to the internal pressure of the inner pot, it does not include unnecessary waiting time, and it is not necessary to add a means or a control program for detecting the pressure in the inner pot.

  In these pressure cookers, a bulging portion that bulges from the inner pot side is provided on the inlet side of the lid exhaust passage that communicates with the inner pot, and the movable member is retreated at one end by the retraction. While moving in the direction of entering into the exit portion, it is configured to move in the direction of exiting from the bulging portion by advancement, and the inner pot is pressurized to a pressure higher than atmospheric pressure, and the moving member advances It is preferable that the stopper member is disposed in the bulging portion so as to enter the vicinity of one end of the moving member in a state where the moving member is moved to prevent the moving member from moving backward.

  Here, in the conventional pressure cooker, a relief valve is provided in order to prevent the internal pressure of the inner pot from rising abnormally. As the relief valve, a bulging portion is provided on the inlet side of the exhaust passage, and a pedestal portion having a vent hole and a spherical member that can roll on the pedestal portion are disposed in the bulging portion. The configuration is widely adopted. In addition, the bulging portion is provided with an insertion port through which the moving member is inserted so as to be able to advance and retract in order to operate the spherical member.

  That is, as the bulging portion on which the stopper member is disposed, a bulging portion that has been conventionally employed can be used. Therefore, it is not necessary to make a significant design change of the lid, and problems such as exhaust leakage do not occur.

  In this case, the sealing means is disposed in the bulging portion and has a pedestal portion having a vent hole communicating with the inner pot, and is movably disposed on the pedestal portion so that the moving member is in the retracted position. A spherical member that is pressed by moving and separated from the vent hole, and the stopper member enters between the moving member and the spherical member at the advanced position of the moving member, It is preferable to arrange on the pedestal. In this way, the bulging portion and the pedestal portion can be simply and reliably implemented because the design of the bulging portion and the pedestal portion only needs to be greatly changed by the space for disposing the stopper member.

  Alternatively, the sealing means closes the inlet portion of the vent hole by a vent hole provided in the stopper member located in the bulging portion, a spring disposed in the vent hole, and a biasing force of the spring. It is preferable to provide a valve body. In this way, it is not necessary to increase the space between the bulging portion and the pedestal portion.

  The moving member is disposed so as to move substantially parallel to the upper end opening of the inner pot. The moving member is provided with a locking hole having a lower surface opening, and the stopper member is connected to the moving member. May be disposed so as to be locked in the locking hole in a state in which is moved to the advanced position. Even in this case, the unlocking of the lid can be surely prevented.

  In the pressure cooker of the present invention, the dedicated stopper member that is directly linked to the internal pressure of the inner pot is provided on the inner lid or the heater cover, so that the stopper member can be reliably operated in conjunction with the pressure in the inner pot. Can do. As a result, it is possible to reliably prevent the user from opening the lid while the pressure in the inner pot is higher than atmospheric pressure.

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

  1 and 2 show a rice cooker that is a pressure cooker according to a first embodiment of the present invention. This rice cooker includes a rice cooker main body 11 that detachably accommodates an inner pot 10 that accommodates an object to be heated, and a lid 22 that is rotatably attached to the rice cooker main body 11.

  The rice cooker main body 11 includes an exterior body having 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. . The shoulder body 14 is provided with an engagement receiving portion 15 that removably engages an engagement claw portion of the lock member 31 of the lid 22 on the front side. Further, the shoulder body 14 is provided with a cylindrical inner cylinder 16 below the central opening, and a protective frame 17 made of a non-conductive material is provided at the lower end of the inner cylinder 16. .

  An induction heating coil 18, which is a first heating means for induction heating the inner pot 10, is disposed on the lower outer peripheral surface of the protective frame 17 via a ferrite core 19. A cylinder heater 20 as a second heating means is disposed on the outer periphery of the inner cylinder 16. Furthermore, the protective frame 17 is provided with an inner pot temperature sensor 21 which is a first temperature detecting means for detecting the temperature of the inner pot 10. The induction heating coil 18 and the trunk heater 20 of the present embodiment, particularly the induction heating coil 18, are operated in a state where the inner pot 10 is sealed by a relief valve 42 in an exhaust passage 34 to be described later. It serves as a pressurizing means for boiling water and pressurizing the inner pot 10 to a pressure higher than the atmospheric pressure by the steam.

  The lid body 22 is attached to the shoulder body 14 of the rice cooker body 11 so as to be openable and closable, and closes the opening of the rice cooker body 11. The lid body 22 includes an upper plate 23 that constitutes an outer surface material together with the exterior body of the rice cooker body 11, and a lower plate 24 that closes the bottom of the upper plate 23. In the lid 22, a metal heater cover 25 serving as a heat radiating plate is disposed on the lower surface of the lower plate 24 that is a portion facing the inner pot 10. A lid heater 26 is provided as a heating means. On the heater cover 25, a lid temperature sensor 27 serving as second temperature detecting means for detecting the temperature in the inner pot 10 is disposed. And the inner cover 38 which seals the upper end opening of the inner pot 10 is detachably arrange | positioned by the lower side facing the inner pot 10 in the heater cover 25 at the cover body 22 of this embodiment.

  The lid 22 is provided with an operation member 28 for opening the lid 22 at the front portion of the upper plate 23. This operation member 28 includes a lock release operation portion 29 exposed to the outside from the mounting hole of the upper plate 23, and a pressing portion 30 for rotating the lock member 31 in the disengagement direction on the inner surface thereof. It is. The operation member 28 is biased upward by a kick spring (not shown).

  Furthermore, a lock member 31 is rotatably attached to the lid body 22 so as to be positioned behind the operation member 28 (inside). The lock member 31 is for maintaining the lid 22 in a closed state with respect to the rice cooker body 11, and is attached to the lower plate 24 so as to be rotatable. The lock member 31 is provided with an L-shaped locking claw portion 32 that is detachably engaged with the engagement receiving portion 15 of the shoulder body 14. In addition, the lock member 31 is provided with a receiving portion 33 that extends obliquely upward on the back surface side and abuts the pressing portion 30 of the operation member 28. The lock member 31 is biased to the engagement position shown in FIG. 1 by a kick spring which is a biasing means (not shown).

  In addition, an exhaust passage 34 that is configured by a duct member that extends from the lower plate 24 to the upper plate 23 and that communicates the inside and the outside of the inner pot 10 is provided inside the lid body 22. In the exhaust passage 34, a bulging portion 35 that bulges from the inner pot 10 side toward the upper plate 23 side is provided at the opening of the lower plate 24 that is the inlet side communicating with the inner pot 10. Yes. The bulging portion 35 is provided with an insertion port 36 through which a rod 49 of a solenoid 48 that is a driving means of a relief valve 42 described later is inserted so as to be able to advance and retract. The heater cover 25 is opened at a portion corresponding to the bulging portion 35, and a gap between the opening edge and the bulging portion 35 is sealed with a packing 37.

  The inner lid 38 includes a metal inner lid body 39, a lid packing 40, and a resin frame 41, and is detachably disposed at the lower portion of the heater cover 25. The inner lid 38 is placed in the bulging portion 35 of the lower plate 24 by being attached to the lid body 22 so that the inner pot 10 can be pressurized to a pressure higher than atmospheric pressure. A relief valve 42 as a sealing means is integrally provided.

  The inner lid main body 39 serves as a heat radiating plate, and an opening communicating with the inner pot 10 is provided at a position corresponding to the bulging portion 35. The lid packing 40 seals the inner pot 10 in close contact with the inner periphery of the opening. The resin frame 41 is fitted into the outer periphery of the inner lid body 39 so that the lid packing 40 is detachably attached to the inner lid body 39.

  The relief valve 42 includes a pedestal member 43 having a trapezoidal cylindrical shape, a cover 45 covering the pedestal member 43, and a spherical member 47 accommodated therein. The pedestal member 43 includes a vent hole 44 having an open area that can be evacuated so that the inner pot 10 is boiled and the inner pressure of the inner pot 10 is equal to the atmospheric pressure. The cover 45 corresponds to the insertion port 36 of the bulging portion 35, and includes an opening 46 through which the rod 49 of the solenoid 48 can be inserted and retracted via the packing 37 and the steam from the inner pot 10 is circulated. . The spherical member 47 rolls on the pedestal member 43 and closes the vent hole 44 to prevent the air in the inner pot 10 from being exhausted to the outside, and the inner pot 10 has a pressure higher than atmospheric pressure. Can be pressurized. Further, the inner pressure of the inner pot is returned to the atmospheric pressure (equilibrium) by releasing (opening) the blockage of the exhaust passage 34 by being pressed by the rod 49. In the present embodiment, when the pressure in the inner pot 10 is increased to a pressure higher than 1.30 atm, the spherical member 47 rolls away from the vent hole 44 at that pressure, and the steam in the inner pot 10 Of the weight W1 that can be discharged to the outside.

  The relief valve 42 is operated by driving a solenoid 48 operated by a microcomputer 72. Specifically, when power is supplied, the solenoid 48 advances the rod 49 toward the lock member 31 (advance position) to roll the spherical member 47 with its own weight, and the spherical member 47 causes a vent hole. 44 is closed. On the other hand, when the electric power is cut off, the rod 49 is moved backward by a spring (not shown) which is a built-in biasing means (retracted position), so that one end moves in a direction to enter the bulging portion 35 and becomes spherical. The member 47 is separated from the air hole 44 to open the air hole 44. A sealing member 50 is disposed at the insertion port 36 of the bulging portion 35, and the spherical member 47 is operated by the rod 49 via the sealing member 50. The rod 49 is a slide member that enters the lower portion of the receiving portion 33 of the lock member 31 in a state where the inside of the inner pot 10 is moved to a pressurizable advance position and prevents the engagement release direction of the lock member 31. 51 is disposed.

  The lid body 22 constitutes a lid body opening mechanism for the lock member 31 and the operation member 28 to open the lid body 22 to the rice cooker body 11. Further, the rod 49 and the slide member 51 constitute a moving member that is operated by the solenoid 48, and this moving member moves in the direction in which the lock member 31 is disengaged by the operation of the lock release operation portion 29 of the operation member 28. The lock mechanism which prevents the movement of the is constituted. The lid opening mechanism and the lock mechanism constitute a lid opening / closing mechanism. That is, the lid opening / closing mechanism of the present embodiment includes the operation member 28, the lock member 31, the rod 49, and the slide member 51.

  The above-described components constituting the sealing means and the lid opening / closing mechanism, that is, the configuration of the bulging portion 35 formed on the lid 22, the relief valve 42 disposed on the lid 22, the slide member 51, etc. The conventional pressure cooker is also installed.

  And in this embodiment, in the state which the rod 49 advanced to the base member 43 of the said relief valve 42, and the state in which the inner pot 10 was pressure | voltage-risen to the predetermined pressure higher than atmospheric pressure, the end of the rod 49 by the pressure And the movement of the rod 49, which is a constituent member of the lid opening / closing mechanism, is prevented from moving to the retracted position, thereby preventing the lock member 31 from being unlocked by the slide member 51. A stopper member 52 is provided. At the upper end of the stopper member 52, a locking portion 53 that hooks and locks on the upper edge of the through hole 43a of the base member 43 is provided so as to protrude outward. Further, a flange portion 54 is provided at the lower end of the stopper member 52 so as to protrude outward, and a packing 55 is disposed on the flange portion 54. The stopper member 52 of the present embodiment is provided with a contact surface portion 56 that is inclined downward toward the rod 49 that is the front side at the upper end portion. When the solenoid 48 is moved to the retracted position in an emergency energized state, the contact surface portion 56 has a disadvantage that the stopper member 52 does not move downward due to the frictional force of the rod 49 (seal member 50) even if the internal pressure of the inner pot 10 decreases. Is provided because there is a possibility of occurrence. In each figure, the contact surface portion 56 is configured such that an inclination angle (angle) α with respect to the forward / backward direction (horizontal) of the rod 49 is 45 degrees. The stopper member 52 is preferably provided with a guide portion that cannot rotate with respect to the base member 43 around the axial direction. For example, a configuration in which a convex portion is provided on one of the outer peripheral portion of the stopper member 52 and the through hole 43a of the base member 43 and a concave portion is provided on the other is applicable to the guide portion.

  Next, the setting of the inclination angle α of the contact surface portion 56 of the stopper member 52 and its own weight W2 will be described.

  As shown in FIG. 3, when the spherical member 47 reaches a pressure (for example, 1.30 atm) slightly higher than a target pressure (for example, 1.25 atm) for increasing the pressure in the inner pot 10, as described above, A weight W1 that is pushed away from the vent hole 44 by the pressure of the steam is applied. Therefore, the solenoid 48 is the minimum that can move the spherical member 47 having the weight W1 as the biasing force Fk of the spring that moves the rod 49 to the retracted position in the non-energized state.

  On the other hand, when one end of the rod 49 comes into contact with the contact surface portion 56 of the stopper member 52 while the solenoid 48 is not energized, the spring biasing force Fk is parallel to the contact surface portion 56 due to the inclination of the contact surface portion 56. In the figure, it is broken down into a component force in the upper right direction and a component force in a direction perpendicular to the contact surface portion 56. At this time, when the stopper member 52 is fixed and the rod 49 can be freely moved, the rod 49 acts so as to rise along the contact surface portion 56 in accordance with a component force in a direction parallel to the contact surface portion 56. To do. However, the stopper member 52 can move in the vertical direction and cannot move in the horizontal direction, and the rod 49 can move in the horizontal direction and cannot move in the vertical direction. Therefore, in the present embodiment, the force Fv that moves the stopper member 52 downward acts due to the inclination of the contact surface portion 56.

  The force Fv for moving the stopper member 52 downward by the biasing force Fk of the spring of the solenoid 48 can be adjusted by adjusting the inclination angle (including horizontal (0 degree)) of the contact surface portion 56. It is. Further, as a force for moving the stopper member 52 downward, a force Fg due to its own weight W2 is further applied. On the other hand, during rice cooking control, when the vent hole 44 is closed by the spherical member 47, a force Fp due to the internal pressure P of the inner pot 10 is applied to the stopper member 52.

  In the present embodiment, when the internal pressure P of the inner pot 10 is equal to or higher than the first set pressure P1 (for example, 1.05 atm), the slide member 51 is positioned in the movement region of the receiving portion 33 of the lock member 31. In order to maintain the lid 22 in a locked state that cannot be opened, the inclination angle of the contact surface portion 56 is Fp1 ≧ Fv + Fg (Fp1: upward force applied to the stopper member 52 by the internal pressure P). α and weight W2 are set. Of course, it goes without saying that the frictional resistance of the seal member 50 and the inner diameter of the through hole 43a are taken into consideration.

  In the rice cooker, an operation panel 57 for a user to input rice cooking conditions or display an operation state of the rice cooker is disposed on the front upper portion of the shoulder body 14. As shown in FIG. 4, the operation panel 57 includes a liquid crystal display panel 58 as a display means at the center. In the middle stage of the liquid crystal display panel 58, a numerical segment 59 is provided that indicates a reservation time, a remaining time required for cooking rice, and the like. In addition, an upper portion of the numerical segment 59 is provided with a non-washed rice segment 60 that indicates whether or not the non-washed rice is in a selected state, and the numerical segment 59 is displayed next to the remaining time (minutes) required for cooking rice. ), An at segment 61 is provided. In addition, a reservation segment 62 is provided at the bottom of the numerical value segment 59. The reservation segments 62 indicate the two types of reserved rice cooking with the letters “reservation”, “1”, and “2”. Further, a pressure segment 63 is provided on the side of the reserved segment 62. The pressure segment 63 is a pressure display portion that pressurizes the inside of the inner pot 10 and indicates a pressure state that the internal pressure is higher than a preset reference pressure. Further, a minute segment 64 is provided beside the pressure segment 63 and indicates the unit of time required for the rice cooking of the numerical value segment 59. A plurality of mark segments 65 having a triangular shape are provided around the liquid crystal display panel 58 to indicate the selection state of the rice cooking menu.

  In addition, the operation panel 57 includes a plurality of rice cooking menus such as “normal”, “mochimochi”, “shakuri” of white rice, and others, so as to be positioned next to the mark segment 65 around the liquid crystal display panel 58. "Mature cooking", "White rice rapid", "Cooked rice", "Sushimeshi", "Okayu", "Okow", "Brown rice", "Brown rice activity" is provided. Further, in order to display the selection state of the two types of heat insulation temperatures, a heat insulation display portion 67 indicated by characters “standard” and “higher” is provided on the lower side portion of the liquid crystal display panel 58 and corresponds to each. LED 68 is provided.

  Further, the operation panel 57 includes a plurality of switches 69a to 69h as input means. On the right side of the liquid crystal display board, a rice cooking switch 69a that is an execution switch for rice cooking processing, a reservation switch 69b that is a selection switch for reserved rice cooking, an up switch 69c and a down switch 69d for changing the current time, rice cooking time, etc. And are provided. In addition, on the left side of the liquid crystal display panel 58, there is a barge switch 69e for canceling (stopping) rice cooking and heat retention control and a selection state, a menu switch 69f for selecting a rice cooking menu, and whether or not the rice is washed. A non-washing rice switch 69g for selecting the temperature and a heat retention selection switch 69h for selecting a heat retention control mode as well as a heat retention control execution switch.

  In the pressure rice cooker configured in this way, a control board 71 is arranged on the front side of the rice cooker body 11 via a holder 70, and a program set in advance by a microcomputer 72 which is a control means mounted on the control board 71. Control is executed according to the following. Specifically, the microcomputer 72 includes a ROM 73 that is a nonvolatile storage unit. The ROM 73 includes a plurality of execution programs including rice cooking and heat retention control, and setting data (data table) used in each execution program. ) Etc. are stored.

  Next, rice cooking control by the microcomputer 72 will be specifically described.

  When the user detects the operation of the rice cooking switch 69a, the microcomputer 72 first starts energization of the induction heating coil 18, and performs a preheating process of heating by adjusting the temperature so that the temperature of the inner pot 10 is about 50 ° C. Execute.

  Then, when the preheating process is finished by elapse of a preset time, energization of the solenoid 48 is started and the relief valve 42 is turned on so that the inner pot 10 can be pressurized. 63 is lit.

  Next, the induction heating coil 18 is energized with 100% (full power) power, and a heating process is performed to boil the water containing the cooked rice in the inner pot 10. Moreover, the capacity | capacitance discrimination | determination process which discriminate | determines the rice cooking capacity accommodated in the inner pot 10 with the rising gradient of the temperature of the inner pot 10 during heating is performed in parallel with this temperature raising process.

  When the temperature raising step is completed, a boiling maintaining step for controlling the induction heating coil 18 based on the input value of the lid temperature sensor 27 is executed.

  When the boiling maintenance process is finished by elapse of a preset time, a cooking process for increasing the energization amount to the induction heating coil 18 is executed.

  In this cooking process, when the dry-up in the inner pot 10 is detected based on the detected temperature, the energization of the solenoid 48 is cut off, the pressure input to the inner pot 10 is released, and the induction heating coil 18 is turned on. While the energization is cut off, an uneven process for starting energization of the trunk heater 20 and the lid heater 26 is performed.

  Moreover, the pressure segment display change process of the operation panel 57 is executed in parallel with the unevenness process. This pressure segment display change processing sets the time until the pressure in the inner pot 10 drops to a pressure (corresponding temperature) that balances with the atmospheric pressure from the temperature at the time of releasing the pressure input when the solenoid 48 is deenergized, The display of the pressure segment 63 is turned off after the set time has elapsed.

  When the preliminarily set time elapses and the unevenness process including the display change process is completed, the rice cooking process is terminated, and then the process proceeds to heat retention control.

  Next, the operation of the relief valve 42 and the stopper member 52 accompanying the energization control for the solenoid 48 during rice cooking control will be specifically described.

  First, in the preheating process, the solenoid 48 is not energized, and the pressure in the inner pot 10 is not increased, so that the stopper member 52 is in a lowered state as shown in FIG. 47 is in a state of being separated from the vent hole 44 by being pressed by the rod 49 in the retracted position.

  Then, when the process proceeds to the temperature raising step and energization of the solenoid 48 is started, as shown in FIG. 5 (B), the rod 49 advances against the urging force Fk of the spring, and the advance position is maintained. Thereby, the spherical member 47 rolls by its own weight, and closes the exhaust passage 34 by being positioned on the vent hole 44 so that the inner pot 10 can be pressurized to a pressure higher than the atmospheric pressure. Further, at this advanced position, the slide member 51 that is a moving member advances forward and enters a downward direction that is a moving region of the receiving portion 33 of the lock member 31. Accordingly, even if the unlocking operation portion 29 of the operation member 28 is pressed and the receiving portion 33 is pressed downward by the pressing portion 30, the lock member 31 can be prevented from rotating. As a result, the engagement between the engagement claw portion of the lock member 31 and the engagement receiving portion 15 of the rice cooker body 11 cannot be released.

  As the temperature in the inner pot 10 rises due to the execution of the temperature raising step, and the stored water boils, the pressure in the sealed inner pot 10 is higher than atmospheric pressure and lower than the first set pressure P1. When the pressure is increased to P2, as shown in FIG. 5C, the stopper member 52 rises (enters) into the cover 45 located in the bulging portion 35 by the pressure. In this state, the stopper member 52 is positioned between one end of the rod 49 and the spherical member 47, and the inclined contact surface portion 56 of the stopper member 52 is positioned on the moving direction of the rod 49.

  In this state, the temperature raising step is finished, and then the boiling maintaining step and the cooking step are finished. When the energization to the solenoid 48 is interrupted by shifting to the unevenness process, the rod 49 is moved in the backward direction by the biasing force Fk of the spring as shown in FIG. Comes into contact with the contact surface portion 56 of the stopper member 52 through the seal member 50. At this time, the pressure in the inner pot 10 gradually decreases due to the interruption of the energization to the induction heating coil 18, but since the air hole 44 is kept closed by the spherical member 47, the descending gradient is gentle. It is. Therefore, immediately after the power supply to the solenoid 48 is cut off, the pressure is higher than the first set pressure P1 higher than the atmospheric pressure. As a result, since the stopper member 52 is pressed upward at a higher pressure than the force obtained by adding the force Fv acting vertically downward and the force Fg due to its own weight W2, the stopper member 52 maintains the raised state. As a result, the rod 49 of the solenoid 48 is prevented from moving to the retracted position, and the state in which the movement of the lock member 31 in the disengagement direction is prevented as shown in the figure.

  On the other hand, in the unevenness process, when the pressure in the inner pot 10 is naturally reduced and the inner pot 10 is reduced to the first set pressure P1, the force Fv acting on the stopper member 52 vertically downward and the force Fg due to the own weight W2. When the force added is increased, the stopper member 52 is moved downward against the internal pressure P of the inner pot 10. As a result, the rod 49 becomes movable to the retracted position by the spring biasing force Fk, and the spherical member 47 is pressed away from the vent hole 44 as shown in FIG. As a result, the slide member 51 moves away from the movement region of the receiving portion 33 of the lock member 31, and the cover 22 is unlocked. However, in a state where the pressure in the inner pot 10 is higher than the second pressure P <b> 2, the stopper member 52 is in a state where the upper end is in contact with the outer peripheral portion of the rod 49.

  Thus, the pressure rice cooker of the present invention does not move the inner lid 38 in conjunction with the inner pressure of the inner pot 10, but has a dedicated stopper member 52 on the inner lid 38, so that it is higher than atmospheric pressure. The stopper member 52 can be reliably operated in the low pressure state P2 lower than the maximum pressure capable of pressurizing the inner pot 10. Therefore, the unlocking operation of the constituent members of the lid opening / closing mechanism can be prevented in a state P1 where the pressure in the inner pot 10 that needs to prevent the user from opening the lid 22 is higher than the atmospheric pressure.

  This configuration is particularly effective when an unintended power failure occurs during rice cooking. That is, few users open the lid 22 during normal rice cooking control. However, if the user pulls out the power cord from the commercial power source for some reason or the rice cooking control is stopped due to a power failure, the user may open the lid 22 and check the rice cooking state. There is. And when rice cooking control is performed, as above-mentioned, if the boiling maintenance process is performed, possibility that the inside of the inner pot 10 will be in a state higher than atmospheric pressure is high.

  However, in the present embodiment, the stopper member 52 that can be reliably operated in conjunction with the internal pressure of the inner pot 10 is disposed without consuming electric power, so that the electric power from the commercial power source is cut off. Even when the energization of the solenoid 48 is interrupted, the same operation as described above is performed. Therefore, in the state where the internal pressure of the inner pot 10 is higher than the set pressure P1 higher than the atmospheric pressure, the lid 22 can be reliably prevented from being opened.

  Further, in the present embodiment, since the urging member for returning the stopper member 52 to the state before the operation is not provided, the structure can be simplified and the cost can be reduced. Furthermore, since the inner lid 38 does not need to be movable with respect to the lid 22, the upper end opening of the inner pot 10 can be reliably sealed. Moreover, since the stopper member 52 is interlocked with the internal pressure of the inner pot 10, it does not include unnecessary waiting time, and can be opened only in a pressure state that can ensure the safety of the user. There is no need to add a pressure detecting means or a control program in 10.

  Since the stopper member 52 of the present invention is added to the configuration of the existing bulging portion 35 and the relief valve 42 from the past, it is not necessary to make a significant design change of the lid 22 and exhaust leakage. It can be carried out easily and reliably without any problems.

  FIG. 6 shows a modification of the pressure rice cooker of the first embodiment. In the modification of the first embodiment, the stopper member 52 and the spherical member 47 are arranged in parallel to the forward and backward direction of the rod 49, and the rod 49 contacts the stopper member 52 and the spherical member 47, respectively. The only difference from the first embodiment is that a pair of abutting end portions (the side of the spherical member is not shown) is provided so as to form a substantially Y shape so as to contact. In this modified example, since the advance / retreat range of the rod 49 can be reduced, it is possible to reduce the size.

  7 and 8 show a pressure rice cooker according to the second embodiment. The second embodiment is different from the first embodiment in that the relief valve 42 including the stopper member 52 is integrally disposed on the heater cover 25 of the lid body 22. And in 2nd Embodiment comprised in this way, the effect | action and effect similar to 1st Embodiment can be acquired. In addition, unlike the first embodiment, since it is not provided on the detachable lid 22, it becomes difficult to clean the relief valve 42 and the stopper member 52 to which the steam containing the Oneba adheres. Occurrence of malfunction due to mounting can be prevented.

  9 and 10 show a pressure rice cooker according to the third embodiment. The third embodiment is greatly different from the first embodiment in that the relief valve 42 is configured by a valve body 77 built in the stopper member 52 instead of the spherical member 47.

  Specifically, the relief valve 42 of the third embodiment is provided with only a through hole 43a through which the stopper member 52 is inserted so as to be movable up and down without providing the vent hole 44 in the base member 43. Further, the spherical member 47 is not disposed inside the base member 43 and the cover 45.

  As in the first embodiment, the stopper member 52 of the third embodiment is provided with a locking portion 53 that is hooked and locked at the upper edge of the through hole 43a of the base member 43 and a packing 55 at the lower end. A flange portion 54 is formed. Further, a contact surface portion 56 that is inclined downward toward the rod 49 side is provided at the upper end portion of the stopper member 52. The stopper member 52 of the present embodiment is provided with a vent hole 44 so as to penetrate through the upper and lower ends. The vent hole 44 includes a stepped portion 75 for locking one end of the spring 74 at the upper portion. Further, the inlet portion 76 of the vent hole 44 is provided in a separate flange portion 54, and its inner diameter is formed to be slightly small. A valve body 77 that closes the inlet portion 76 by the biasing force of the spring 74 is disposed inside the vent hole 44. When the pressure in the inner pot 10 is increased to a pressure higher than 1.30 atm, the valve body 77 moves upward against the urging force of the spring 74 at that pressure, and opens the inlet 76.

  The stopper member 52 of the present embodiment is set so that the total weight including the valve body 77 and the spring 74 is W2 as in the first embodiment.

  In 3rd Embodiment comprised in this way, if a user detects operation of the rice cooking switch 69a, after performing a preheating process similarly to 1st Embodiment, the energization to the solenoid 48 will be started and the slide member 51 will start. The rotation of the lock member 31 is prevented, the lid 22 is locked in a state where it cannot be opened, and the pressure segment 63 is turned on. Thereafter, the temperature raising step and the capacity determination step are processed in parallel, and then the unevenness step is executed through the boiling maintenance step and the cooking step. During this unevenness process, the energization of the solenoid 48 is interrupted to move the rod 49 to the retracted position, and the pressure segment display change process is executed. In addition, when the unevenness process is completed, the process proceeds to heat retention control.

  Next, the operation of the relief valve 42 and the stopper member 52 accompanying the energization control for the solenoid 48 during rice cooking control will be specifically described.

  First, in the preheating process, since the solenoid 48 is not energized and the pressure in the inner pot 10 is not increased, the stopper member 52 is in a lowered state as shown in FIG.

  Then, when the process proceeds to the temperature raising step and energization of the solenoid 48 is started, as shown in FIG. 10B, the rod 49 advances against the urging force Fk of the spring, and the advance position is maintained. As a result, the slide member 51 enters the lower part, which is the movement region of the receiving portion 33 of the lock member 31, so that the lid 22 cannot be opened with respect to the rice cooker body 11.

  When the temperature in the inner pot 10 rises due to execution of the temperature raising step and the stored water boils, the pressure in the inner pot 10 is increased to a second pressure P2 that is higher than atmospheric pressure and lower than the first set pressure P1. Accordingly, as shown in FIG. 10C, the stopper member 52 is raised by the pressure. In this state, the stopper member 52 is positioned in the backward direction at one end of the rod 49.

  When the energization to the solenoid 48 is interrupted by shifting to the unevenness process, the rod 49 is moved in the backward direction by the biasing force Fk of the spring as shown in FIG. Comes into contact with the contact surface portion 56 of the stopper member 52. At this time, in a state where the pressure in the inner pot 10 is higher than the first set pressure P1, the rod 49 abuts against the abutment surface portion 56 and moves in the backward direction as in the first embodiment. Maintain a blocked state. When the inside of the inner pot 10 becomes lower than the first set pressure P1 due to natural pressure reduction, the stopper member 52 moves downward against the inner pressure of the inner pot 10 and the lock of the lid 22 is released.

  Thus, the pressure rice cooker of 3rd Embodiment comprised can acquire the effect | action and effect similar to 1st Embodiment. In addition, in the third embodiment, since the valve body 77 constituting the relief valve 42 is built in the stopper member 52 and the spherical member 47 is not used, the space between the existing bulging portion 35 and the pedestal portion is increased. do not have to. Therefore, it can be implemented more easily than the first embodiment. In the third embodiment, as in the modification of the first embodiment, the advance / retreat range of the rod 49 can be reduced, so that the size can be reduced.

  11 and 12 show a pressure rice cooker according to the fourth embodiment. In the fourth embodiment, the stopper member 52 is disposed in the bulging portion 35 constituting the relief valve 42 of the lid body 22 in each of the above embodiments, whereas the lid plate opening / closing mechanism is made to penetrate the lower plate 24. This is largely different from each embodiment in that the slide member 51 is a moving region of the slide member 51, which is a constituent component of the above-described component parts, so that the slide member 51 can move forward and backward.

  Specifically, the relief valve 42 of the fourth embodiment has the same configuration as that of a conventional pressure rice cooker in which only the spherical member 47 is accommodated so as to roll. The slide member 51 that moves parallel to the upper end opening of the inner pot 10 is provided with a locking hole 78 having a lower surface opening in the front frame portion. In addition, in the lower plate, the slide member 51 advances in conjunction with the advancement of the rod 49, and the insertion hole 79 coincides with the locking hole 78 in a state where the slide member 51 is located below the movement region of the receiving portion 33 of the lock member 31. Is provided.

  The detachable inner lid 38 is provided with a pedestal member 80 similar to the pedestal member 43 of the relief valve 42 at a position corresponding to the vertical direction with respect to the insertion hole 79 in a state of being attached to the lid 22. The pedestal member 80 is provided with a stopper member 52 similar to that of each embodiment.

  In the fourth embodiment configured as described above, in the preheating step, the solenoid 48 is not energized, and the pressure in the inner pot 10 is not increased. Therefore, as shown in FIG. 52 is in a lowered state.

  Then, when the process proceeds to the temperature raising step and energization to the solenoid 48 is started, as shown in FIG. 12B, the rod 49 advances against the urging force Fk of the spring, and the advance position is maintained. Thereby, the pressing of the spherical member 47 is released, and the air hole 44 is closed by the spherical member 47 so that the inside of the inner pot 10 can be pressurized. Moreover, the slide member 51 enters the downward direction, which is the movement region of the receiving portion 33 of the lock member 31, and sets the lid 22 in a locked state in which the lid 22 cannot be opened with respect to the rice cooker body.

  When the temperature in the inner pot 10 rises due to execution of the temperature raising step and the stored water boils, the pressure in the inner pot 10 is increased to a second pressure P2 that is higher than atmospheric pressure and lower than the first set pressure P1. As a result, as shown in FIG. 12C, the stopper member 52 is raised by the pressure. As a result, the contact surface portion 56 of the stopper member 52 enters the inside of the locking hole 78 of the slide member 51.

  When the solenoid 48 is de-energized by shifting to the unevenness process, the rod 49 is moved in the backward direction by the spring biasing force Fk as shown in FIG. The member 51 is also moved in the backward direction. Accordingly, the lower end edge of the locking hole 78 of the slide member 51 comes into contact with the contact surface portion 56 of the stopper member 52. In this state, in a state where the pressure in the inner pot 10 is higher than the first set pressure P1, the moving member is in contact with the contact surface portion 56, and the state in which movement in the backward direction is prevented is maintained. When the inside of the inner pot 10 becomes lower than the first set pressure P1 due to natural pressure reduction, the stopper member 52 moves downward against the inner pressure of the inner pot 10 and the lock of the lid 22 is released.

  Thus, the configured pressure rice cooker of the fourth embodiment can obtain the same operations and effects as those of the first embodiment. In addition, in the fourth embodiment, the stopper member 52 is not entered between the rod 49 and the spherical member 47 as in the first embodiment. Therefore, it is possible to reduce the size.

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

  For example, as a component part of the lid opening / closing mechanism for locking the stopper member 52, the rod 49 is used in the first to third embodiments, and the slide member 51 is used in the fourth embodiment. 28 may be used. In addition, when locking to these, the tube which faces the inside of the inner cover 38 is arrange | positioned inside the cover body 22, and it is made to interlock | cooperate with the internal pressure of the inner cover 38. FIG.

  In each embodiment, the time during which the inner pot 10 is lower than the set pressure P1 is estimated based on the temperature when the energization of the solenoid 48 is interrupted, and the pressure segment 63 is turned off when the estimated time elapses. However, a sensor that detects that the slide member 51 has moved to the retracted position may be provided, and the pressure segment 63 may be turned off when the retracted position is detected. In this case, considering the power consumption of the backup battery for power failure, it is preferable to use a sensor with low power consumption such as a microswitch.

  Furthermore, in each embodiment, the configuration is such that the energization to the solenoid 48 that shifts to the unevenness process is cut off, but the configuration that the energization to the solenoid 48 is interrupted when the unevenness process ends and the shift to the heat retention control is performed. It is good.

  Furthermore, in the third and fourth embodiments, the stopper member 52 is disposed on the inner lid 38, but may be disposed on the heater cover 25 as in the second embodiment.

  Further, an urging member for returning the stopper member 52 to its pre-operation state can be arranged so that the force of the urging member can be used in addition to the force Fg due to its own weight W2 and the force Fv due to the urging force of the solenoid 48 spring. It is. In this case, a configuration in which the force Fv by the solenoid 48 is not used without providing the contact surface portion 56 of the stopper member 52 is also possible.

  And the apparatus which provides the stopper member 52 linked with the internal pressure of the inner pot 10 in the inner cover 38 or the heater cover 25 like this invention is not restricted to a pressure rice cooker, It is similarly applied to the cooker which cooks a predetermined cooking material. It can be applied, and similar actions and effects can be obtained.

It is sectional drawing which shows the pressure rice cooker of 1st Embodiment which concerns on this invention. It is sectional drawing which shows the state which removed the inner cover of the pressure rice cooker of FIG. It is a partial expanded sectional view for demonstrating the structure of a moving member and a stopper member. It is a block diagram which shows the structure of the pressure rice cooker containing an operation panel. (A), (B), (C), (D) is sectional drawing which shows the effect | action of the relief valve and stopper member of 1st Embodiment. It is sectional drawing which shows the modification of the pressure rice cooker of 1st Embodiment. It is sectional drawing which shows the pressure rice cooker of 2nd Embodiment. It is sectional drawing which shows the state which removed the inner cover of the pressure rice cooker of FIG. It is sectional drawing which shows the pressure rice cooker of 3rd Embodiment. (A), (B), (C), (D) is sectional drawing which shows the effect | action of the relief valve and stopper member of 3rd Embodiment. It is sectional drawing which shows the pressure rice cooker of 4th Embodiment. (A), (B), (C), (D) is sectional drawing which shows the effect | action of the slide member and stopper member of 4th Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Inner pan 11 ... Rice cooker main body 15 ... Engagement receiving part 18 ... Induction heating coil (heating means and pressurizing means)
DESCRIPTION OF SYMBOLS 22 ... Cover body 25 ... Heater cover 26 ... Cover heater 28 ... Operation member 29 ... Lock release operation part 31 ... Lock member 32 ... Locking claw part 33 ... Reception part 34 ... Exhaust passage 35 ... Expansion part 38 ... Inner cover 39 ... Inner lid body 40 ... Lid packing 41 ... Resin frame 42 ... Relief valve (sealing means)
43 ... Base member 44 ... Ventilation hole 47 ... Spherical member 48 ... Solenoid 49 ... Rod (moving member)
51. Slide member (moving member)
52 ... Stopper member 56 ... Contact surface part 74 ... Spring 76 ... Inlet part 77 ... Valve body 78 ... Locking hole 80 ... Base member

Claims (6)

A main body having an inner pot for accommodating an object to be heated;
A heating means disposed in the main body for heating the inner pot;
A lid that is attached to the main body so as to be openable and closable, and closes the inner pot;
An exhaust passage which is provided in the lid and communicates the inside and outside of the inner pot;
A lock member provided on the lid body and having an engaging claw portion detachably engaged with an engagement receiving portion of the main body, and an operation of the unlocking operation portion by moving from the retracted position to the advanced position A lid opening / closing mechanism having a constituent member including a moving member that prevents the lock member from moving in the disengagement direction of the lock member;
A sealing means provided so as to be located in the exhaust passage and capable of pressurizing the inner pot by closing the exhaust passage;
Pressurizing means for pressurizing the inner pot sealed by the sealing means to a pressure higher than atmospheric pressure,
In the pressure cooker in which an inner lid that seals the upper end opening of the inner pot is detachably disposed at a portion of the lid facing the inner pot.
The inner lid is provided with a stopper member that operates at the pressure in the inner pot when the inner pot is boosted to a predetermined pressure higher than atmospheric pressure, and prevents the unlocking operation of the constituent members of the lid opening / closing mechanism, A pressure cooker characterized in that it is impossible to open the lid in a state where the inside of the inner pot is pressurized to a predetermined pressure higher than atmospheric pressure. A main body having an inner pot for accommodating an object to be heated;
A heating means disposed in the main body for heating the inner pot;
A lid that is attached to the main body so as to be openable and closable, and closes the inner pot;
An exhaust passage which is provided in the lid and communicates the inside and outside of the inner pot;
A lock member provided on the lid body and having an engaging claw portion detachably engaged with an engagement receiving portion of the main body, and an operation of the unlocking operation portion by moving from the retracted position to the advanced position A lid opening / closing mechanism having a constituent member including a moving member that prevents the lock member from moving in the disengagement direction of the lock member;
A hermetic seal is provided so as to be located in the exhaust passage, and the inside of the inner pot can be pressurized by closing the exhaust passage, and the pressure in the inner pot is balanced with the external pressure by opening the exhaust passage. Means,
Pressurizing means for pressurizing the inner pot sealed by the sealing means to a pressure higher than atmospheric pressure,
In the pressure cooker in which a heater cover for disposing a lid heater is disposed in a portion facing the inner pot in the lid,
The heater cover is provided with a stopper member that operates at the pressure in the inner pan when the inner pan is boosted to a predetermined pressure higher than atmospheric pressure, and prevents the unlocking operation of the constituent members of the lid opening / closing mechanism, A pressure cooker characterized in that it is impossible to open the lid in a state where the inside of the inner pot is pressurized to a predetermined pressure higher than atmospheric pressure. On the inlet side communicating with the inner pot in the exhaust passage of the lid, a bulging portion that bulges from the inner pot side is provided,
The moving member is configured to move in a direction in which one end thereof moves into the bulging part by retreating, and moves in a direction to escape from the bulging part by advancement,
The stopper member is disposed in the bulging portion so that the inside of the inner pot is raised to a predetermined pressure higher than atmospheric pressure, and the moving member moves to the advanced position and enters near one end of the moving member. The pressure cooker according to claim 1, wherein the moving member is prevented from retreating. The sealing means includes
A pedestal having a vent hole disposed in the bulging portion and communicating with the inner pot;
It is disposed on the pedestal portion so as to be able to roll, and the moving member is pressed by moving to the retracted position and separated from the vent hole, while the moving member is moved to the advanced position by pressing. A spherical member that is released and located on the vent hole and closes the exhaust passage,
The pressure cooker according to claim 3, wherein the stopper member is disposed on the pedestal portion so as to enter between the moving member and the spherical member at an advance position of the moving member. .   The sealing means is built in the stopper member, and a vent hole provided in the stopper member located in the bulging portion, a spring disposed in the vent hole, and the urging force of the spring allows the passage. The pressure cooker according to claim 3, further comprising a valve body that closes an inlet portion of the pore. The moving member is disposed so as to move substantially parallel to the upper end opening of the inner pot, and the moving member is provided with a locking hole of a lower surface opening,
The pressure cooker according to claim 1 or 2, wherein the stopper member is disposed so as to be locked in the locking hole in a state where the moving member is moved to the advanced position.

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