JP5261567B2 - Pressure cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pressure type rice cooker which can efficiently separate a large amount of sticky paste from moisture at once. <P>SOLUTION: The pressure type rice cooker includes: a pan into which cooked rice is put; a rice cooker body which has a heater to heat the cooked rice; a lid body which blocks the rice cooker body; and a control device. In the lid body, a pressure valve, a valve opening mechanism and a sticky paste storage tank are arranged. The sticky paste storage tank forms a vacant room, and the vacant room has: a sticky paste separation room which separates the sticky paste and the steam; and a steam discharge path which discharges the steam to the outside. In the sticky paste separation room, a steam pipe which passes the steam containing the sticky paste which blew off from the pressure valve is arranged, and an injection opening which carries out distribution and injection at least two directions is provided at a top part of the steam pipe. <P>COPYRIGHT: (C)2012,JPO&amp;INPIT

Description

  The present invention relates to a pressure-type rice cooker that cooks rice by raising the pressure in the pan to more than atmospheric pressure, and more specifically, includes a rice pad from the pressure valve when the pressure valve is forcibly opened during the boiling maintenance step. The present invention relates to a pressure-type rice cooker that prevents the spilling of the rice cake outside even if a large amount of steam is ejected.

  Electric rice cookers are now a necessity in ordinary households, and various types of rice cookers have been developed and used so far. In these rice cookers, a large amount of steam and rice balls are generated during rice cooking, which may jump out of the rice cooker and contaminate surrounding tables and floors. In particular, since the rice ball is viscous, the rice ball becomes a bubble and jumps out of the lid, sticks to the surface of the lid, and sticks into the gap of the lid. It becomes an adhering matter and cannot be removed by washing or the like, and if it is to be peeled off, it must be shaved with a sharp blade or the like, which may damage the lid. Also, such stubborn deposits sometimes become a burial site for bacteria and may cause sanitary problems.

  In order to solve such problems, steam and rice balls generated in the pan are separated in the process until they pass through the lid and are released into the atmosphere, and the heavy rice balls are used as a receiver. A rice cooker has been proposed that stores and discharges steam into the atmosphere.

  For example, a container is attached to the lid that covers the opening of the rice cooker body, and a steam guide tube that takes in steam containing rice crackers generated during rice cooking into this container and discharges steam. There has been proposed a rice cooker provided with a steam port and a guide wall surrounding the outlet side of the steam guide tube (see Patent Document 1 below). According to this rice cooker, since the steam passage extending from the steam guide tube to the steam port can be taken long, the steam containing the rice cracker is separated into the rice cake and the steam, and the spilling of the rice cake can be prevented. In addition, rice cookers have been proposed in which a rice bowl is further provided with a pool recess, a communication port that communicates the pool recess with the inner pan, and an open / close valve that opens and closes the communication port by the internal pressure of the inner pan (see below). Patent Document 2). According to this rice cooker, it is possible to reliably prevent the spilling of the rice balls.

Japanese Patent Application Laid-Open No. 11-244137 (paragraphs [0012] and [0013], FIG. 3) JP-A-11-244138 (paragraphs [0011], [0013], FIG. 3) JP 2008-48766 (paragraph [0039], FIG. 3)

  According to the rice cookers of Patent Documents 1 and 2, the rice cracker and the steam are separated in the container, and only the steam is released into the atmosphere, so that the above problem can be solved. However, since all of these rice cookers cook rice in the pan at a substantially atmospheric pressure, the amount of steam containing rice balls that blow out during cooking is not so large, and the momentum is also high. Since it does not become strong, it can be handled with the proposed container.

  In recent years, pressure rice cookers have been developed that cook rice by raising the pressure in the pan above atmospheric pressure. The applicant of the present application has developed a pressure-type rice cooker that boosts the inside of the pan to atmospheric pressure or more and forcibly opens the pressure valve for a predetermined number of times during the boiling maintenance process and has already patented it. (See, for example, Japanese Patent No. 3851293, Japanese Patent No. 4094022, and Japanese Patent No. 4094023).

  For example, the pressure-type rice cooker of Japanese Patent No. 3852293 has a pan that houses a cooked rice containing water and rice, an opening that houses the pan, and a heating means that heats the cooked rice in the pan. A pressure valve having a rice cooker body, a lid for closing the pan and the opening of the rice cooker body, and an open / close mechanism for communicating or blocking the inside of the pan and the outside air so that the pressure in the pan is substantially constant A pressure valve opening mechanism that is attached to the pressure valve and forcibly opens the pressure valve; and controls a heating amount of the heating means and opens the pressure valve by the pressure valve opening mechanism. A pressure-type rice cooker that cooks rice in a pressurized state in a boiling maintenance process in a series of rice cooking processes, wherein the pressure valve is the pressure valve in the boiling maintenance process. It is not forcibly opened by the pressure valve opening mechanism. The pressure in the pan is maintained at 1.10 to 2.20 atm, and the control means is configured such that the cooked rice in the pan has a boiling temperature and the boiling While the moisture in the initial stage of the maintenance process is sufficient, the pressure valve is forcibly opened at least once by the pressure valve opening mechanism, so that the pressure in the boiling pan is reduced to near atmospheric pressure at once. This causes the bumping phenomenon to occur and controls the rice grains to be stirred.

  According to this pressure-type rice cooker, the pressure inside the pan is increased to atmospheric pressure or higher, that is, 1.10 to 2.20 atm, and the pressure valve is forcibly opened during the boiling maintenance process. The inside drops rapidly from the high pressure state to near atmospheric pressure, and a violent boiling phenomenon, so-called bumping phenomenon occurs in the pan, and the cooked rice is agitated by this bumping phenomenon, so it becomes a delicious cook without uneven rice cooking. . However, during the opening operation of the pressure valve, a large amount of steam including a tortoise is ejected from the pressure valve at once and vigorously. The amount and momentum of the steam containing this rice ball is several times the amount and momentum compared to conventional atmospheric rice cookers, so the technology such as the rice vessel of the atmospheric rice cooker cannot be adopted as it is. It has been improved.

  In addition, the applicant has also proposed a rice cooker that has been developed so far, including those of the above-mentioned patents, in which the number of pressure valves is one, but the number is increased to a plurality. (See Patent Document 3 above).

  If there are a plurality of pressure valves like this pressure-type rice cooker, the amount of steam including rice balls will increase and the momentum will increase. For example, when a plurality of pressure valves are opened at the same time, a large amount of steam containing a large amount of steam is ejected from the pressure valves with great force. For this reason, if a large amount of steam is released from the steam outlet at once, the risk of burns and the like increases, and the tobacco is released to the outside and contaminates the surroundings. Therefore, this umami component is discharged to the outside, and as a result, the cooked food lacks umami. Furthermore, since a large amount of rice balls are ejected, when returning a large amount of stored rice balls to the inside of the pan, there is a problem that if the water is returned to one place, the place becomes watery.

  Therefore, the present invention has been made to solve such problems of the prior art, and is to efficiently separate a large amount of steam and steam at a time.

In order to solve the above-mentioned problems, the present invention relates to a pot for containing a rice cooker containing rice and water, a rice cooker body having heating means for containing the pot and heating the cooked rice, and the rice cooker. A lid that can be opened and closed to close the opening of the main body; and a control device that controls the heating means. The lid includes a pressure valve, a valve opening mechanism that controls the operation of the pressure valve, A temporary storage tank that temporarily stores a spray that is ejected during operation and a storage tank that discharges steam to the outside is disposed, and the control device controls the heating means and the pressure valve so that the inside of the pan is at atmospheric pressure or higher. In the boiling maintenance step, the pressure valve is opened, a bumping phenomenon occurs, and the rice cooker stirs the cooked rice in the pan to cook the rice. An upper case covering the opening of the lower case; When the upper case and the lower case are combined, a vacant space is formed in the interior of the upper case, and in the vacant chamber, a crisp separation chamber that separates the bonito and steam, and a steam discharge passage that discharges steam to the outside The lower case includes a bottom plate portion and a lower case side plate portion standing up to a predetermined length from the periphery of the bottom plate portion, and the bottom plate portion of the lower case has a predetermined length from the lower case side plate portion. A partition plate is erected from the bottom plate portion toward the opening of the lower case at a distance, and a passage portion is formed between the partition plate and the lower case side plate portion. In the separation chamber, a steam pipe through which steam including a bowl ejected from the pressure valve is allowed to pass, an injection port is provided at the top of the steam pipe, and the injection port is separated into two. has an opening, the two openings are then toward selfish opening in the partition plate, The ceiling part of the above case has a substantially U-shaped barrier plate part that collides with steam from the two openings, and a diffuser plate part that diffuses the steam hitting the barrier plate part in a predetermined direction. A letter-shaped dispersion / diffusion member hangs down toward the lower case, and when the pressure valve is opened in the boiling maintenance step, passes through the steam pipe from the pot and is separated into two by the two openings . A large amount of steam containing nebula is jetted from the two openings toward the barrier plate part, collides with the barrier plate part, and is dispersed and diffused by the diffusion plate part, and then cooled. The steam is discharged from a steam port formed at the location of the upper case corresponding to the steam discharge path.

  According to the invention of the present application, an approximately separating chamber for separating the steam and the tongue is provided in the approximately storage tank, and a steam pipe is provided in the separating chamber, and further, the injection port is dispersed and ejected in at least two directions above the steam pipe. Since the steam containing the rice bowl is dispersed in a plurality of directions at once, the rice bowl and the steam can be efficiently separated at a time.

FIG. 1 is an external perspective view of a pressure rice cooker according to an embodiment of the present invention. FIG. 2 is a perspective view of the rice cooker of FIG. 1 with the lid open. FIG. 3 is a plan view of the lid body with the inner lid removed from the lid body of FIG. 4 is a cross-sectional view of the rice cooker of FIG. 1 cut at a substantially central portion. FIG. 5 is an enlarged cross-sectional view of the lid portion of FIG. FIG. 6 is a perspective view of the upper case of the lower case of FIG. FIG. 7 is a top view of the lower case of FIG. 8 is a top perspective view of the upper case of FIG. 9 is a bottom perspective view of the upper case of FIG. 10 shows a shower plate, FIG. 10A is a front view, FIG. 10B is a rear view, and FIG. 10C is a cross-sectional view taken along XC-XC in FIG. 10A.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the embodiment shown below exemplifies a pressure rice cooker for embodying the technical idea of the invention, and is not intended to specify the present invention. It is equally applicable to those of other embodiments included in.

  With reference to FIGS. 1-4, the pressure type rice cooker which concerns on embodiment to this invention is demonstrated. Note that. FIG. 1 is an external perspective view of a pressure rice cooker according to an embodiment of the present invention, FIG. 2 is a perspective view of a state where the lid of the rice cooker in FIG. 1 is opened, and FIG. FIG. 4 is a cross-sectional view of the rice cooker of FIG. 1 cut at a substantially central portion.

  The pressure-type rice cooker 1 which concerns on embodiment of this invention is the induction heating coil which heats the pot 6 which puts the rice cooked containing water and rice, the opening part which accommodates this pan so that attachment or detachment, and the pot in a pot are carried out. A rice cooker body 2 having a heating means 35 such as 35a and a control means for controlling the heating means 35 to perform rice cooking and heat retention control of the cooked rice, and a lid 9 for closing the opening of the pan 6 and the rice cooker body 2 I have. The control means includes a pressure valve 38 having an opening / closing mechanism for communicating or blocking the inside of the pan and the outside air so that the pressure in the pan 6 is substantially constant, and the pressure valve 38 attached to the pressure valve 38 to forcibly open the pressure valve. And a valve opening mechanism 43 for controlling the heating amount of the heating means, and also controls the opening operation of the pressure valve 38 by the valve opening mechanism 43. The control means is configured to change the pressure in the pan by opening the pressure valve 38 at least once by the valve opening mechanism 43 during boiling. In this embodiment, two pressure valves 38 and two valve opening mechanisms 43 are provided (see FIG. 3).

  The rice cooker main body 2 has a bottomed cylindrical inner case 3 formed of a nonmetallic material that accommodates the pan 6 therein, and an outer case 4 that covers the inner case. 6 is detachably accommodated. The inner case 3 is formed with a flange 3a projecting to the outer periphery at its upper end. The pan 6 is formed with a flange 7 projecting outward at an upper end opening thereof, and the pan 7 is placed so as to be hooked on the flange 3 a of the inner case 3. Moreover, the part which notched part is formed in the side surface which the flange 3a of the inner case 3 opposes, A part of flange 7 of the pan 6 protrudes from this notch part, and pan 6 is taken out from the inner case. It becomes easy to take out. The inner case 3 is provided with an induction heating coil 35a on the outer periphery near the bottom. The inner case 3 is provided with a side heater 35b between the upper opening and the induction heating coil 35a.

  In the rice cooker body 2, a control board 36 for supplying and controlling electric power to the induction heating coil 35a, the side heater 35b, the lid heater 35c and the like is disposed at a location close to the intake hole 5a. Electronic components such as an inverter 37 made of semiconductor elements, a switching element, and a timer element are mounted on the control board 36. Among these electronic components, the inverter 37 generates heat during operation and is cooled by the heat sink or the cooling fan 50. The rice cooker body 2 is provided with a temperature detection sensor 8 at the center of the bottom 5 so as to be in contact with the bottom surface of the pan 6.

  As shown in FIG. 4, the bottom 5 of the rice cooker body 2 is formed with an intake hole 5 a that sucks air to the left and right and an exhaust hole 5 b that discharges the sucked air, and the intake hole 5 a and the exhaust hole 5 b are The bottom 5 is formed with a plurality of narrow grooves having a predetermined width and length, so-called slits. The cooling fan 50 is disposed at a position close to the intake hole 5a. The cooling fan 50 is operated by a motor (not shown), and cools the inverter with the air sucked from the intake hole 5a.

  The rice cooker main body 2 is provided with a locking member 33 formed on the upper end of the inner case 3 on the opposite side of the hinge member 28 described later, and by two locking claws formed on the locking member. The lid can be fixed by being locked with the locking portion formed in the rice cooker body 2. Further, the locking member is formed with a lock member abutting portion, which is in contact with the lock member so that the lid cannot be opened and closed during pressurization. Further, the locking portion is configured to open and close the lid body 9 in conjunction with an opening / closing knob 47 provided on the outer case. At this time, an apparatus is incorporated between the opening / closing knob 47 and the locking portion 33 so that the lid body does not open / close even when the opening / closing knob 47 is pressed during pressurization. Since this apparatus is well known, detailed description is omitted.

  The lid 9 has an operation plate 48 mounted on the upper surface of the outer lid 10. The operation plate 48 is provided with a rice cooking button 48a, selection and time adjustment buttons, a cut button, a heat retention button, a reservation button, a function button, and other operation buttons, and a liquid crystal display panel 48b. The selected rice cooking menu or the like is displayed.

  The lid body 9 has a configuration in which the outer lid 10 and the lid cover 31 are respectively attached to the upper and lower sides of the frame body 11, and the inner lid 12 is detachably attached to the frame body 11 via the lid cover 31. It attaches so that the upper opening part of the two inner cases 3 may be covered. The lid body 9 is pivotally supported on the rice cooker body 2 by using the frame body 11 using the hinge member 28 and the pivot pin 29, and the lid body 9 can be opened and closed to the rice cooker body 2. A lid heater 35c is disposed between the frame 11 and the inner lid 12 so as to be covered with the lid cover 31, and a lid temperature sensor (not shown) is provided. Near the center of the inner lid 12 is a pressure valve 38 that controls the steam pressure in the rice cooker body 2 to adjust the pressure, and is opened when the pan is abnormally pressurized due to a failure of the pressure valve, etc. A safety valve (not shown) for releasing pressure is mounted.

  The outer lid 10 is detachably mounted with a tow storage tank 13 for temporarily storing a tow. The rice balls are collected in the storage tank 13 in the start-up heating process and the boiling maintenance process, and when the pressure in the pan 6 is reduced in the steaming step, the negative pressure valve 30 returns to the pan 6. Yes.

  Around the outer periphery of the inner lid 12, a pot packing 32 that seals the flange portion 7 of the pot 6 and the inner lid 12 is supported and attached to the outer frame 34. When the pan 6 is accommodated in the rice cooker body 2 and covered with the lid 9, the pan packing 32 is pressed against the opening edge of the pan 6 and the pan 6 is closed.

  Further, on the pot 6 side of the inner lid 12, there is attached a toy shower plate 27 for diffusing and supplying the toy collected in the storage tank into the pot 6.

  The lid 9 has an inner lid 12 formed of a stainless steel material, an aluminum material, or a clad material made of both. The inner lid 12 is formed by press-molding a metal plate into a disk shape so that a step is formed between the peripheral portion and the inside, and the peripheral portion is made of a hard plastic through a rubber pot packing 32. An outer frame 34 is attached. The outer frame 34 is provided with a locking portion for mounting the inner lid. The pot packing 32 is in close contact with the flange portion 7 of the pot 6 and maintains pressure by sealing the pot 6. The pot packing 32 is preferably formed from silicon rubber having excellent durability and heat resistance.

  A protrusion that can close the notch is formed in a portion facing the notch formed in the inner case 3 inside the lid.

  The inner lid 12 is provided with two pressure valves that can be selectively operated. Each pressure valve has a valve hole with the same diameter. FIG. 3 is a plan view of the outer lid 10 with the inner lid 12 removed from the lid body 9. Two pressure valves 38 (see FIG. 4) and a valve opening mechanism are provided side by side in the vicinity of the center of the outer lid 10, and the operating rod 45, which is a part of these valve opening mechanisms, It protrudes into the outer lid 10 from the hole. In these pressure valves, the operating rod 45 is driven by a solenoid (not shown) attached to the inside of the outer lid 10, but in this embodiment, a link mechanism is provided between each pressure valve and the solenoid. The movement of the solenoid is transmitted to the pressure valve through this link mechanism.

  As shown in FIG. 4, the pressure valve 38 includes a valve seat 40 having a valve hole 39, a metal ball 41 that closes the valve hole 39 by its own weight on the valve seat 40, and a cover 42 that covers the ball 41. It consists of. These pressure valves 38 are forcibly controlled by the valve opening mechanism 43 when the ball 41 is moved or separated from the valve hole 39 according to the balance between the pressure in the pan 6 and the weight of the ball 41. The valve hole 39 is opened and closed by moving the ball 41 to the right.

  In this embodiment, two pressure valves are used and the diameters of the valves are the same. However, the number may be two or more, and the diameters of the valves may be different. Thereby, fine rice cooking control corresponding to the amount of rice cooking becomes possible.

  Next, the storage tank will be described with reference to FIGS. 5 is an enlarged cross-sectional view of the lid portion of FIG. 4, FIG. 6 is a perspective view of the upper case of the lower storage tank of FIG. 4, FIG. 7 is a lower case top view of the lower storage tank of FIG. 4 is a top perspective view of the upper case of the storage tank of FIG. 4, and FIG. 9 is a bottom perspective view of the upper case of the storage tank of FIG.

  The rice storage tank (hereinafter referred to as a storage tank) 13 is a tank that is common to the two pressure valves, that is, a tank that receives the steam containing the rice cake ejected from both pressure valves. A common tank facilitates design and management, but if the two pressure valves are opened simultaneously during the boiling maintenance process, the amount of steam containing the tomb increases and the momentum is one pressure. Since it is twice or more than that of the valve, if the volume of the tank is small, the rice cake may be discharged to the outside. As a countermeasure, it is conceivable to increase the volume of the storage tank. However, simply increasing the size of the storage tank efficiently separates the stomach and steam, leaving the mouth, and releasing only steam from the steam outlet. I can't. In addition, if a large amount of hot steam is ejected from the steam port, there is a risk of burns and the like. Therefore, in order to avoid this danger, it is necessary to reduce the momentum and release it with some cooling.

  Therefore, the storage tank according to the embodiment of the present invention has a large internal volume corresponding to the number of pressure valves. For example, when there are two pressure valves, the storage tank is 1.2 times as large as when one pressure valve is used. The volume is approximately doubled and the above-mentioned problems are solved.

  The storage tank 13 forms a flat vacant space that spreads widely in the horizontal direction inside, a vacant separation chamber that separates the gusset, a vapor reservoir chamber that temporarily accumulates and waits for vapor, and a vapor Is divided into a steam discharge passage that discharges to the outside, and the steam including the powder injected from the pressure valve is dispersed in a large flat space in the separation chamber, and the steam is separated from the steam, The separated steam is temporarily stored in the steam storage chamber, and then enters the steam discharge path and is discharged from the steam port.

  According to this configuration, since the volume of the storage tank is increased and there is no partition wall or the like that becomes a hindrance in the flat vacant chamber, the steam including the rice cake is expanded and dispersed all at once in the storage tank. And are separated efficiently. In addition, the steam separated in the separation chamber is temporarily stored in the steam storage chamber, and after being cooled, enters the steam discharge path and is discharged from the steam outlet. In addition, since the discharged steam is also cooled, safety during cooking is ensured.

  Hereinafter, a specific configuration of the storage tank will be described.

  The storage tank 13 includes a lower case 14 that is detachably attached to the lid body 9 and that is fed with steam that includes a meander from two pressure valves, and an upper case 22 that covers the opening of the lower case. It is made of a synthetic resin molding. These upper and lower cases can be separated into two. With this configuration, the upper and lower cases 14 and 22 can be cleaned and dried separately, so that they can be managed hygienically. When the lower case 14 is combined with the upper case 22, a vacant space (space) is formed in which the inside expands in a flat shape in the horizontal direction. And a steam storage chamber that temporarily stores and waits for steam, and a steam discharge passage that discharges the steam stored in the steam storage chamber to the outside.

  As shown in FIGS. 6 and 7, the lower case 14 includes a horizontally elongated bottom plate portion 14 a having a pair of opposed long sides and short sides, and a side plate portion erected at a predetermined height from the periphery of the bottom plate portion. 14b to 14e and a shallow container having an opening 14f provided on a surface opposed to the bottom plate part with the top part of the side plate part opened. Of the side plate portions 14b to 14e, the side plate portions 14c to 14d are formed of a plate-like body that is erected at a substantially right angle from the bottom plate portion 14a, and one side plate portion 14b is erected in a substantially arcuate shape from the bottom plate portion. Yes. By curving the side plate portion, the inner space can be expanded by extending to the outermost edge of the outer periphery of the lid. The lower case 14 is surrounded by a pair of opposed long and short side bottom plate portions and side plate portions, and a space of a predetermined volume is formed therein. This space has an elongated rectangular parallelepiped shape extending in the horizontal direction, that is, in the horizontal direction.

  The bottom plate portion 14a of the lower case has a horizontally long rectangular shape having a pair of opposed long sides and short sides, and has a tough collecting portion S1 that makes it easy to collect a tangle at a substantially central portion, Both sides, that is, the side plate portion side of the short side is partitioned into a steam reservoir S2 into which the separated steam enters. The tow collecting part S1 and the steam storing part S2 are partitioned by a raised protrusion 141 having the bottom plate part 14a raised upward by a predetermined height, and the raised protrusion 141 serves as a ridge line, and each toy collecting part S1 and steam The inclined surface is lowered toward the reservoir S2. When the toy recovery part S1 and the steam storage part S2 are combined with the upper case 22, they form a toy separation room and a steam storage room.

  If you ask, recovery part S1 is comprised by the hollow which has a comparatively large area. The collecting portion S1 is provided with a tortuous reservoir hole 15 in which one long side 14b side is recessed downward by a predetermined depth to collect a nebula at the bottom. With this configuration, the toy recovery part S1 becomes a kind of rain dew having a descending inclined surface that descends from the pair of opposing raised protrusions 141 and the long side parts 14b and 14c toward the torches storage hole 15, If it has flowed down along the descending inclined surface, it flows into the reservoir hole 15 and is collected. The pocket hole 15 has a substantially circular opening 15a having a predetermined size, a cylindrical portion 15b having a predetermined length hanging downward from the opening, and a bottom portion 15c blocking the opening of the cylindrical portion. The bottom has a predetermined area. The bottom portion 15c is provided with a negative pressure valve 16 and a steam guide cylinder 17 for introducing steam including a bowl into the tank. The negative pressure valve 16 is provided so as to penetrate the bottom portion, and has a function of opening when the inside of the pan becomes negative pressure and returning the trap accumulated in the trap reservoir 15 to the pan.

  The steam guide cylinder 17 has one end passing through the bottom portion 15c and the opening communicating with the pressure valve. The other end is closed and the inside is a hollow cylindrical body. It is erected to reach the case. The steam guide tube 17 is provided with an injection port 18 for steam containing a sprout at the top. The injection port 18 faces the long side plate 14c and has a large opening area, that is, an opening of more than half of the circumference. This opening is preferably separated into two openings 181 and 182 by dividing a substantially central portion by a partition wall 180. That is, by separating into two, it becomes possible to distribute the steam efficiently, by causing the steam containing the rice bowl to divide into approximately two directions and to have a directivity, and to collide with the barrier plate portion of the upper case.

  The steam storage part S2 is located on both sides of the rice bowl recovery part S1, and is a space where the rice bowl and the steam are separated by the recovery part and the separated steam is temporarily stored.

  The lower case 14 is provided with a partition wall plate 19 standing on the inner wall surface on the side of the one long side plate portion 14c at a predetermined distance from the inner wall surface and substantially parallel to the inner wall surface from the bottom plate portion toward the opening 14f. . The partition plate 19 reaches both the vapor reservoirs S2, and a long and narrow passage portion S3 is formed with a gap between the side plates 14d and 14e on the short sides. This passage portion S3 becomes a steam discharge passage when combined with the upper case 22.

  The long side plate portion 14c is provided with a pair of latching portions 20a and 20b and the other side plate portion 14b with hook portions 21a and 21b separated by a predetermined distance. Since the storage tank 13 is elongated by the pair of locking portions and hooking portions, stable engagement can be achieved.

As shown in FIGS. 8 and 9, the upper case 22 includes a horizontally-long rectangular ceiling portion 22 a having a pair of opposed long sides and short sides, and a side plate portion 22 b that is suspended from the periphery of the ceiling plate portion by a predetermined length. -22e and an opening 22f on a surface facing the bottom plate part where the top part of the side plate part is opened, and a shallow container having a size covering the opening 14f of the lower case 14. Of the side plate portions 22b to 22e, the side plate portions 22b to 22d are formed of a plate-like body erected substantially at a right angle from the bottom plate portion 22a, and one side plate portion 22e is erected in a curved manner from the bottom plate portion. The ceiling plate portion 22a has a decorative surface on its outer surface 22a '. As shown in FIG. 9, a dispersion / diffusion member 24 having a predetermined height is suspended from the ceiling plate portion toward the lower case. The dispersion / diffusion member 24 is composed of a frame wall plate that surrounds the top of the cylindrical body of the lower case 14. This frame wall board is formed by integral molding with the ceiling board part. The dispersion / diffusion member 24 includes a barrier plate 24a that collides and disperses the vapor from the injection port, and a pair of substantially parallel opposing and predetermined lengths that strike the barrier plate 24a and diffuse in a predetermined direction. and a diffuser portion 24b made of plate material, has a substantially U-shape. The diffusion plate portion 24b is formed such that the height of the diffusion plate portion 24b standing from the ceiling plate portion decreases as the distance from the barrier plate portion 24a decreases, so that the steam diffuses in a wide range immediately after colliding with the barrier plate portion 24a. ing. The upper case is formed with a linear steam port 23 at a location corresponding to the passage. The upper case 22 is provided with a hooking portion 25 and a locking portion 26 on opposite side plates 22b and 22c on the long sides.

  The operation of the storage tank 13 will be described. In the boiling maintenance process, when the pair of pressure valves are opened at the same time, the pressure in the pan drops from high pressure to near atmospheric pressure almost instantaneously, causing intense boiling in the pan, that is, a sudden boiling phenomenon, Is stirred in the pan. At this time, a large amount of steam containing rice balls passes through the steam guide tube and enters the storage tank. When entering the storage tank 13, it collides violently from the pair of bifurcated injection ports toward the barrier plate, and enters the interior along the barrier plate. Since the impact plate and the guide surface are narrow, the impact wall plate portion is immediately dispersed and diffused after the collision. Due to this dispersion / diffusion, the rice ball is heavier than the steam, so it cannot be over the raised protrusion and is collected in the collecting part, and the light steam goes over the top of the raised protrusion and heads to the steam reservoir, After temporarily waiting in this steam reservoir, it passes through the passage, passes through the steam discharge passage, and is discharged from the steam outlet to the outside.

  According to this configuration, the volume of the storage tank is increased, and the steam containing the rice cake is expanded and dispersed all at once in the flat empty chamber, so that the rice cake and the steam are efficiently separated. In addition, the steam separated in the separation chamber is temporarily stored in the steam storage chamber, and after being cooled, enters the steam discharge path and is discharged from the steam outlet. In addition, since the discharged steam is also cooled, safety during cooking is ensured. In addition, since the storage tank has a larger volume as the number of pressure valves increases, the rice bowl and the steam are efficiently separated, and safety is further ensured.

  Since a large amount of rice cake is stored in the storage tank, a shower plate is used to distribute this large amount of rice cake into the pan almost evenly.

  Hereinafter, with reference to FIG. 10, this rice shower plate will be described. 10 shows a shower board, FIG. 10A is a front view, FIG. 10B is a rear view, and FIG. 10C is a cross-sectional view taken along XC-XC in FIG. 10A.

  The shower plate 27 has a configuration in which the area is increased corresponding to the number of pressure valves and the number of dispersion holes is increased. In addition, since the amount of the conventional shower plate does not increase, it has a small diameter (for example, refer to Japanese Patent No. 4476306).

  The shower plate 27 has a size that substantially closes the opening of the pan, that is, a circular dish having a diameter close to the diameter of the pan opening and a predetermined thickness, and is formed of a metal plate processed body. The bed shower plate 27 has a receiving area 27a that receives a drop falling due to the opening of the negative pressure valve 16 of the storage tank 13, and a bed dispersion area 27b that distributes the bed around the outer periphery of the receiving section. doing. The receiving region 27a has a substantially circular area with a small diameter just below the negative pressure valve of the inner lid, and a small number of dispersion holes 271 are formed in this small area. The dispersed region 27b has a concentric circle with a predetermined distance outwardly from the center receiving region 27a, and a plurality of dispersed dispersion holes 271 are formed at substantially equal intervals on the concentric circumference. It is preferable that the concentric circumferential portion is recessed and the dispersion hole 271 is provided in the recessed portion.

  When the inside of the pan becomes negative pressure and the negative pressure valve of the inner lid is opened and the rice bowl falls, the rice bowl is collected in the central receiving area 27a. Since the area is small and the number of the dispersion holes 271 is small, some of the sticks drop into the pan. Other rice balls move to the rice bowl dispersion region 27b and are dropped into the pan sequentially from the rice bowl dispersion holes 271 arranged on the concentric circumference. As a result, rice balls are distributed almost uniformly in the pan, and delicious rice is cooked.

DESCRIPTION OF SYMBOLS 1 Pressure type rice cooker 2 Rice cooker main body 3 Inner case 4 Outer case 6 Pan 9 Lid body 10 Outer lid 11 Frame body 12 Inner lid 13 Onoba storage tank (common storage tank)
14 Lower case 14a Bottom plate portion 14b to 14e Side plate portion 14f Opening 15 Snake reservoir hole 16 Negative pressure valve 17 Steam guide tube (steam pipe)
18 Injecting Port 22 Upper Case 23 Steam Port 24 Dispersing / Diffusion Member 24a Barrier Plate Part 24b Diffusion Plate Part 27 Stick Shower Plate 38 Pressure Valve 43 Valve Opening Mechanism S1 Stick Collecting Part S2 Steam Reserving Part S3 Steam Passing Part

Claims (1)

A pan for containing rice and water containing rice, a rice cooker body having a heating means for containing the pan and heating the cooked rice, and an openable / closable lid for closing the opening of the rice cooker body; A control device for controlling the heating means,
The lid is provided with a pressure valve, a valve opening mechanism for controlling the operation of the pressure valve, and a reservoir tank for temporarily storing a gusset ejected during operation of the pressure valve and discharging steam to the outside. Set up
The control device controls the heating means and the pressure valve to increase the pressure in the pan to atmospheric pressure or higher, and in the boiling maintenance step, opens the pressure valve to generate a bumping phenomenon, and cooks the cooked rice in the pan In the pressure rice cooker that stirs inside and cooks rice,
The rice storage tank has a lower case and an upper case that covers the opening of the lower case, and when the upper case and the lower case are combined, a vacant space is formed therein, and the A nematic separation chamber for separating neba and steam, and a steam discharge passage for discharging steam to the outside,
The lower case has a bottom plate portion and a lower case side plate portion erected for a predetermined length from the periphery of the bottom plate portion,
On the bottom plate portion of the lower case, a partition plate is erected from the bottom plate portion toward the opening of the lower case at a position away from the lower case side plate portion, and the partition plate and the lower case side plate portion A passage is formed between and
A steam pipe that allows steam including the powder ejected from the pressure valve to pass through the to-be-separated separation chamber, and an injection port is provided at the top of the steam pipe.
The injection port has an opening which is separated into two, the two openings are then toward selfish opening in the partition plate,
The ceiling part of the upper case has a substantially U plate that collides with steam from the two openings, and a diffusion plate part that diffuses the steam that hits the barrier plate in a predetermined direction. A letter-shaped dispersion / diffusion member hangs down toward the lower case, and when the pressure valve is opened in the boiling maintenance step, passes through the steam pipe from the pot and is separated into two by the two openings . A large amount of steam containing nebula is jetted from the two openings toward the barrier plate part, collides with the barrier plate part, and is dispersed and diffused by the diffusion plate part, and then cooled. A pressure rice cooker that is discharged from a steam port formed at a location of the upper case corresponding to a steam discharge path.

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