JP2010273719A - Rice cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress boiling over of viscous liquid foam produced upon boiling rice on the upper face of a lid without relying on setting heating power of a rice cooker. <P>SOLUTION: A plurality of exhaust ports 8a-8e are situated on the bottom of a recess provided on the upper surface of a lid 3. The inner periphery of the recess is composed of a pair of opposing parts 31, 32 perpendicular to the level and a wall part 33 connecting the opposing parts. All exhaust ports 8a-8e are lined on the bottom of the pair of opposing parts 31, 32 and provided with an inner surface part 34 continuous in the vertical direction from the pair of opposing parts 31, 32. The exhaust ports 8a, 8e at both ends of the line are provided with an inner surface part 35 continuous in the vertical direction from the wall part 33, wherein the height of the pair of opposing parts is made higher than the viscous liquid foam B4 produced upon boiling rice that expands largest from the exhaust ports 8a-8e. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a rice cooker, and more particularly to an exhaust port of a steam passage provided in a lid.

  The steam generated in the rice cooking pan during cooking is led to the atmosphere by the steam path of the lid. During cooking, a sticky rice cake foams in the rice cooker, and the rice cake foam may reach the exhaust port. Since the exhaust port is open to the upper surface of the lid, it is not preferable that bubbles blow out from the exhaust port. Therefore, there is one in which a plurality of exhaust ports opened in a common upper flow path are provided (Patent Document 1). Since the plurality of exhaust ports are open to the common upper flow path, the flow path cross section of each exhaust port is narrower than the upper flow path. For this reason, large onset bubbles may flow in the upper flow path having a relatively large channel cross section, but large onset bubbles may be cut off at the wall portion separating the exhaust ports or when trying to pass through narrow exhaust ports. Or crushed. As a result, it is practiced to reduce or reduce the amount of foam that blows down on the upper surface of the lid.

Japanese Patent Application Laid-Open No. 2004-57687 (especially FIG. 3, FIG. 4, FIG. 8)

  As described above, when bubbles are made smaller by a plurality of exhaust ports, a film of the toughness is stretched at the exhaust port, and the film swells outward with steam, and may grow into bubbles. In the rice cooker disclosed in Patent Document 1, each of the plurality of exhaust ports has an outlet edge that substantially follows the overall surface shape of the upper surface of the lid. For this reason, bubbles blow out from the exhaust port and easily spread along the upper surface of the lid. As long as rice is cooked under the proper amount and usage conditions, it is possible to design so that foam does not blow down, but there is a concern that rice cooking will be carried out incorrectly and the rice will be foamed abnormally The For this reason, the heating power of the rice cooker was set conservatively so that no blistering occurred even if the amount of water added was incorrect. Refraining from firepower sacrificed the ability to cook high heat to bring out the flavor of rice, leaving room for improvement.

  Therefore, an object of the present invention is to make it difficult for bubbles to blow down on the upper surface of the lid without depending on the setting of the heating power of the rice cooker.

  In order to solve the above-mentioned problems, the present invention includes a lid provided with a steam path that guides steam in the rice cooker to the atmosphere, and the steam path is open to a plurality of upper surfaces and a common upper flow path of the lid. In the rice cooker having an exhaust port, the plurality of exhaust ports are located at the bottom of a recess provided in the upper surface of the lid, and the inner periphery of the recess is a wall surface perpendicular to a horizontal plane, Among the plurality of exhaust ports, at least one exhaust port employs a configuration having an inner surface portion that is continuous in the vertical direction from the inner peripheral portion of the recess. Here, “perpendicular to the horizontal plane” means not only that the plane is perpendicular to the horizontal plane, but also includes an inevitable inclination from the right angle with respect to the horizontal plane in terms of manufacturing. In the case of forming by molding, it means that a draft angle is given to the inner periphery of the recess. The “vertical direction” means not only a direction perpendicular to the horizontal plane but also a direction having the inevitable inclination from a right angle.

  When the plurality of exhaust ports are located at the bottom of the concave portion provided on the upper surface of the lid, the bubble that comes out of the exhaust port swells from the bottom of the concave portion. If the inner circumference of the recess is made of a wall surface perpendicular to the horizontal, the self-weight of the bubble that is going to get over the inner circumference of the recess works most effectively to prevent the rise, so that it may go out of the recess. hard. If the exhaust port has an inner surface portion that is continuous in the vertical direction from the inner peripheral portion of the recess, the bubble that comes out of the exhaust port is easily attached to the inner peripheral portion of the recess as it is. Since the resistance due to the adhesion acts in the vertical direction, it works most effectively to prevent the bubbles from rising. Moreover, even if the bubble rises, it becomes easy to rise straight due to adhesion. As a result, it becomes easier for the bubble to stay right above the exhaust port, so that the bubble generated underneath is in contact with the bubble or the weight of the bubble above It becomes easy to break. Therefore, according to the present invention, it is possible to achieve that it is difficult for bubbles to be blown off at least with respect to at least one exhaust port only by the lid structure.

  The inner periphery of the recess has a pair of facing portions, and the at least one exhaust port includes the inner surface portion that is continuous in the vertical direction from one side of the pair of facing portions, and the other of the pair of facing portions. It is preferable to have the 2nd inner surface part which followed the said perpendicular direction from the side. A bubble that swells from the exhaust port easily attaches to the pair of facing portions. Therefore, the resistance due to the adhesion acts along the direction of gravity, making it more difficult to blow.

  More preferably, the plurality of exhaust ports are arranged at the bottom between the pair of facing portions, and all the exhaust ports have the inner surface portion and the second inner surface portion. If all the exhaust vents are arranged at the bottom between a pair of facing parts, it will be easy for sticky bubbles coming out of any exhaust vent to stick to a pair of facing parts, and they will be crushed in contact with the sticky foam from the adjacent exhaust vents. It becomes easy. Moreover, since the several exhaust port is located in a line between the bottom of a pair of facing part, the effect which crushes a bubble can be exhibited to the maximum.

  Of the plurality of exhaust ports, the exhaust port located at the end has a third inner surface portion that is continuous in the vertical direction from the wall surface portion that connects the pair of facing portions of the inner periphery of the recess. Is particularly preferred. The use of the portion obstructed by the three sides on the inner periphery of the concave portion is more likely to cause the above-described foaming or crushing. Of course, it is better that the exhaust ports at both ends have third inner surface portions.

  It is preferable that the inner periphery of the recess is provided higher than the bubble that swells the most from the exhaust port. If the bubble swells to the maximum, the inner periphery of the recess cannot be easily overcome, and it is more difficult for blow-off to occur.

  As described above, the present invention can attain at least one exhaust port provided on the upper surface of the lid with only a lid structure to blow out bubbles or reduce generated bubbles. Therefore, without relying on the setting of the heating power of the rice cooker, it is possible to make it difficult for the foam to blow onto the upper surface of the lid.

(A) is an enlarged cross-sectional view showing a plurality of exhaust ports in the vicinity of a plurality of exhaust ports according to the first embodiment, taken along line II in FIG. 6, and (b) is a pair of facing portions and wall surface portions according to the first embodiment. Sectional drawing showing the action at the same cutting position as line II in FIG. 6, (c) is a sectional view showing the state of (b) at the same cutting position as line VII-VII in FIG. Sectional drawing which shows the whole structure of the rice cooker which concerns on 1st Embodiment. (A) is sectional drawing which shows the structure of the pressure regulation valve vicinity of the cover concerning 1st Embodiment, (b) is sectional drawing which shows the effect | action of the explosion-proof packing of said (a), (c) is said explosion-proof packing (D) is a longitudinal front view of the explosion-proof packing Enlarged view of the vicinity of the inner lid packing in FIG. (A) is a perspective view of the cap member which concerns on 1st Embodiment, (b) is a perspective view which shows the effect | action of the collector which concerns on 1st Embodiment, (c) is a top view of said (b). An enlarged top view of the vicinity of a plurality of exhaust ports according to the first embodiment Sectional drawing of the VII-VII line in FIG. (A) is a perspective view which shows the non-return valve of the collector which concerns on 1st Embodiment, (b) is a perspective view of the state which removed the valve body from said (a) (A) is a top view of a plurality of exhaust ports according to the second embodiment, (b) is an enlarged cross-sectional view showing a modified example of (a) at the same cutting position as the line II in FIG. Sectional drawing which shows the some exhaust-port vicinity which concerns on 3rd Embodiment in the same cutting position as the II line in FIG. Top view of a plurality of exhaust ports according to the fourth embodiment

  As shown in FIG. 2, the rice cooker according to the first embodiment of the present invention (hereinafter simply referred to as “first embodiment”) is provided with a steam path 2 that guides the steam in the rice cooker 1 to the atmosphere. It consists of an electric rice cooker with a lid 3. As shown in FIG. 2 and FIG. 3A, the steam path 2 heats the heat radiating plate 4 and the heat radiating plate 4 from the steam inlet that opens to the heat radiating plate 4 that radiates heat into the rice cooker 1 through the pressure regulating valve 5. If it passes through the gap between the heater cover 6 and the trapping chamber 7, it reaches the trapping chamber 7 and communicates with the atmosphere through a plurality of exhaust ports 8a, 8b, 8c.

  As shown in FIG. 3A, a pressure sensor 9 that detects the internal pressure of the rice cooker 1 is incorporated in the lid 3. The pressure sensor 9 has a pressure introduction path communicating with the rice cooker 1. As shown in FIG. 3B, the pressure introduction path is sealed with an explosion-proof packing 10 between the opening of the heater cover 6 and the opening of the heat sink 4. As shown in FIGS. 3 (b) to 3 (c), the explosion-proof seal portion 11 of the explosion-proof packing 10 has an 8-shaped cross section in which the inner surface side is pressed against the plate surface portion around the opening of the heat radiating plate 4. The explosion-proof seal portion exerts a sealing function by being pressed against the plate surface portion of the heat radiating plate 4, and is separated from the plate surface by deformation warped outward at a predetermined internal pressure or higher, and releases the pressure to the steam path 2. For this reason, the explosion at the time of abnormal internal pressure rise is prevented. If the explosion-proof seal portion 11 has an eight-shaped cross section, it is difficult to be caught on the plate surface of the heat radiating plate 4 when warped outward as compared with a conventionally known cross-sectional shape. Therefore, it has excellent operational stability and high safety against variations in the compression amount of the explosion-proof packing 10 due to manufacturing errors and assembly errors of the heat sink 4 and the explosion-proof packing 10 and the like, and contamination of the plate surface portion of the heat sink 4. .

  As shown in FIGS. 2 and 4, the outer peripheral portion of the heat radiating plate 4 is fitted with the inner lid packing 12, and the fitting portion of the ring member 13 that fixes the fitted inner lid packing 12 to the heat radiating plate 4. It has become. By closing the lid 3, the tongue piece 12 a of the inner lid packing 12 is brought into close contact with the sealing surface of the rice cooker 1. As shown in an enlarged view in FIG. 4, a gap 14 is formed between the tongue piece 12 a and the root portion 12 b that supports the tongue piece 12 a and the ring member 13. When closing the lid 3, when the tongue piece 12 a comes into contact with the sealing surface of the rice cooker 1, the gap 14 is formed, so that the tongue piece 12 a to the root portion 12 b are easily bent. For this reason, the lid closing force can be reduced as compared with the case without the gap 14.

  The tow trapping chamber 7 shown in FIG. 2 is detachably provided. As shown in FIGS. 2 and 5, the trapping chamber 7 includes a cap member 15 that forms a part of the upper surface of the lid 3 when mounted on the lid 3, and the heat radiating plate 4 when mounted on the lid 3. And a collector 16 communicating with the gap between the heater cover 6.

  As shown in FIGS. 6 and 7, the plurality of exhaust ports 8 a to 8 e are opened on the upper surface of the cap member 15 in which the lid upper surface portion is formed. As shown in FIG. 2, when assembled in the trapping chamber 7, the plurality of exhaust ports 8 a and the like are opened to the common upper flow path 17 provided in the collector 16.

  As shown in FIGS. 2 and 5, the collector 16 has a partition 19 between the steam inflow chamber 18 communicating with the upstream of the trapping chamber 7 and the upper flow path 17. In general, a flow path for introducing steam from the steam inflow chamber 18 to the upper flow path 17 is formed between the partition 19 and the cap member 15 in the assembled state in the capture chamber 7. In order to provide this flow path, the partition 19 has a notch 20. As shown by arrows in FIGS. 5B and 5C, the direction of the steam flow is given to the upstream flow path 17 when it is introduced from the steam inflow chamber 18 through the notch 20 into the upper flow path 17, thereby upstream. A swirling flow of steam along the inner periphery of the path 17 is generated, and the swirling flow is eventually drawn toward the swirling center by the introduction flow in the vicinity of the notch 20 and rises toward the plurality of exhaust ports 8a shown in FIG. A flow is generated. While the swirling flow flows along the inner circumference of the upper flow path 17, the tow contained in the steam adheres to the inner surface of the upper flow path 17, and the steam and most of the tow are separated. Note that such a trapping means using a swirling flow is conventionally known as described in JP-A-2001-309851. The separation means is not limited to this, and other means, for example, a separation means using a labyrinth can be adopted.

  The rice balls separated in the upper flow path 17 return to the inside of the rice cooking pot 1 because the umami component of rice is included. Specifically, as shown in FIG. 8, when the check valve 21 provided in the partition 19 is opened, the bed in the upper flow path 17 passes through the valve hole 22 of the check valve 21 and enters the steam inflow chamber. Returning to 18, it is possible to return to the cooking pot 1.

  Here, the check valve 21 can be omitted, and the return can be returned to the partition 19 simply by forming a reflux hole such as the valve hole 22. When the recirculation hole is opened, the steam in the steam inflow chamber 18 is spouted into the upper flow path 17 through the recirculation hole by virtue of the steam ejected into the steam inflow chamber 18, so that the swirling flow is Disturbance and may reduce separation performance. If the check valve 21 is employed, there is no such ejection.

  As the check valve 21, it is possible to adopt a structure in which a valve hole 22 that penetrates the partition 19 is formed and a valve body 23 that opens and closes the valve hole 22 is attached to the vapor inlet chamber 18 side of the partition 19. An attaching / detaching portion for the partition 19 is provided on the upper portion of the valve body 23 in the swirling flow. The lower portion of the valve body 23 is a portion that closes the valve hole 22. When there is no twist on the bottom of the upper flow path 17, the valve element 23 is in contact with the partition 19 at the peripheral edge thereof as shown by a solid line in FIG. In this state, even if the valve body 23 is pressed with steam or steam from the steam inflow chamber 18 side, the peripheral edge is only pressed against the partition 19, and no backflow occurs. The pressure from the upper flow path 17 side which the lower part of the valve body 23 receives also changes according to the fluctuation | variation of the amount of toughness which accumulates on the bottom of the upper flow path 17. In accordance with this pressure change, as indicated by a two-dot chain line in FIG. 8A, the degree of elastic deformation of the valve body 23 warping from the lower side to the steam inflow chamber 18 side also changes. Therefore, the opening degree of the check valve 21 automatically changes according to the amount of accumulation in the upper flow path 17.

  The valve body 23 as described above can be easily provided by using a plate-like rubber. When the plate-shaped rubber is used, a void is integrally formed on the upper portion of the valve body 23, and a protrusion 24 for press-fitting the void of the valve body 23 is provided in the partition 19, thereby simplifying the attachment / detachment structure of the valve body 23. Can be realized. The space of the valve body 23 is a through hole, but may be a recess.

  Although not shown, a protrusion can be formed integrally with the valve body 23 and a space can be formed in the partition 19. When a space is provided in the partition 19, the protrusion of the valve body 23 penetrates the partition 19, and the protrusion contributes to disturb the swirling flow that flows along the upper flow path 17 side of the partition 19. It is preferable to provide a space on the side.

  In the case of adopting the above-described mounting structure with protrusions and voids, the valve body 23 is prevented from being displaced in the direction around the protrusions. If the partition 19 and the valve body 23 are provided with an engaging portion that prevents rotation, the rotation can be easily achieved. The engaging portion can be realized by, for example, a lower plate thickness surface of the valve body 23 and ribs 25 and 25 provided on the partition 19 and sandwiching the valve body 23 from both sides. In addition, by obtaining the rotational resistance in the shape of the press-fitting fitting portion between the protrusion and the space, the protrusion and the space can also serve as the engaging portion.

  In addition, the structure which concerns on the non-return valve 21 is equipped with the collector which has a partition between the vapor | steam inflow chamber connected to the clearance gap between a heat sink and a heater cover, and an upper flow path, and a swirl flow is carried out in an upper flow path. It can be arbitrarily employed in a rice cooker that performs separation if used, and combined use with the configuration of the present invention is not essential.

  As shown in FIGS. 1A and 6, the plurality of exhaust ports 8 a to 8 e are located at the bottom of a recess provided on the upper surface of the cap member 15. The large bubble B1 in the upper flow path 17 is cut, for example, at the bottom wall that partitions the exhaust ports 8a and 8b. Further, another large bubble B2 is crushed, for example, when trying to pass through the narrow exhaust port 8c. As a result of these occurrences, as shown in the exhaust port 8e, a rough film F can be stretched. As illustrated in the exhaust port 8d, the film is inflated upward by steam, and may emerge as a bubble B3 from the exhaust port 8d. In this way, the bubbles that emerge from each of the plurality of exhaust ports 8a to 8e can be made smaller than in the upper flow path. In addition, if large bubbles B1 and B2 are crushed while trying to pass through the plurality of exhaust ports 8a to 8e, the number of bubbles coming out from the plurality of exhaust ports 8a to 8e can be reduced.

  The inner periphery of the concave portion includes a pair of facing portions 31 and 32 and a wall surface portion 33 that connects the pair of facing portions 31 and 32 to each other. The pair of facing portions 31 and 32 and the wall surface portions 33 and 33 are wall surfaces perpendicular to the horizontal plane. The plurality of exhaust ports 8 a to 8 e are arranged at the bottom between the pair of facing portions 31 and 32.

  In the present invention, the inner periphery of the recess has an upper surface area including all of the upper end surfaces 3a, 3b, 3c, and 3d of the bottom wall portion that partitions the plurality of exhaust ports and the outlets of the plurality of exhaust ports (in FIG. This is a portion that surrounds a region where a hanging pattern is drawn and extends in the vertical direction above the upper surface region. The recess in this invention is formed by the inner circumference and the upper surface area. The inner periphery of the concave portion in the present invention is not limited to a pair of one or more wall surfaces having the same shape facing each other like the pair of facing portions 31 and 32. In the first embodiment, the edge portion 36 having an arcuate cross section provided continuously above the pair of facing portions 31 and 32 and the wall surface portion 33 is not a portion that forms a recess in the present invention. Redundant portions such as the rim portion 36 are used for the purpose of giving redundancy to the spilling prevention performance in order to alert the appearance of the steam ejection portion on the appearance, and may be omitted. Is possible.

  As shown in FIG. 1B, the exhaust port 8c is enlarged as an example, and all the exhaust ports 8a to 8e are connected to the inner surface portion that is continuous in the vertical direction from one side of the pair of facing portions 31 and 32, and the other side. To a second inner surface portion that is continuous in the vertical direction. The inner periphery of the recess and the inner surfaces of the exhaust ports 8a to 8e are symmetrical with respect to a plane perpendicular to the bisector in the longitudinal direction of the recess (corresponding to a vertical plane including the line VII-VII in FIG. 6). It is in shape. Therefore, since the inner surface portion and the second inner surface portion have the same shape, hereinafter, the same reference numeral 34 is used for each.

  As shown in an enlarged view in FIG. 1C, among the plurality of exhaust ports 8 a to 8 e, the exhaust ports 8 a and 8 e positioned at the end are the third inner surface portion 35 that continues from the wall surface portion 33 in the vertical direction. Have

  The representative bubble B4 coming out from the exhaust port 8c will be described as a representative example. As shown in FIGS. 1B and 1C, the bubble B4 expands from the bottom of the recess. Since the pair of facing portions 31, 32 and the wall surface portion 33 are wall surfaces perpendicular to the horizontal, as shown by a two-dot chain line in FIG. 1 (b), the bubble B4 is a pair of facing portions 31, 32, Even if it tries to get over the wall portion 33, the bubble B4 needs to go directly above, and the weight of the bubble B4 most effectively acts to prevent the rise. Therefore, it is unlikely that the bubble B4 will reach the outside of the recess as compared with the wall surface in which the inner circumference of the recess is positively inclined outward.

  As shown in FIG. 1B and FIG. 1C, the exhaust port 8c has an inner surface portion 34 that is continuous in the vertical direction from one side of the pair of facing portions 31 and 32. It becomes easy to stick to one side of the pair of facing portions 31 and 32. Since the resistance due to the adhesion acts in the vertical direction, it acts most effectively to prevent the bubble B4 from rising.

  Similarly, since the exhaust port 8 c has the second inner surface portion 34, the bubble B 4 is easily attached to the other side of the pair of facing portions 31 and 32.

  Further, if the bubble B5 exiting from the exhaust port 8a at the end of the line is described as a representative example, since the exhaust port 8a has the third inner surface portion 35, the bubble B5 includes a pair of facing portions 31, 32, and It becomes easy to adhere to the wall surface portion 33.

  Further, if the bubble B5 that exits from the exhaust port 8a is described as a representative example, even if the bubble B5 attached to the pair of facing portions 31 and the like rises as described above, the bubble B5 is likely to rise straight due to adhesion. As a result, it is easy for the bubble B5 to stay right above the exhaust port 8a, so that the bubble B6 generated below the bubble B5 comes into contact with the upper bubble B5 or receives the weight of the bubble B5. It becomes easy to break by the influence.

  Moreover, as shown in FIGS. 6 and 7, the plurality of exhaust ports 8 a to 8 e are arranged at the bottom between the pair of facing portions 31 and 32, and all the exhaust ports 8 a to 8 e are connected to the inner surface portion 34. And the second inner surface portion 34. For this reason, if it comes out of any exhaust port 8a-8e, it will become easy to stick to a pair of facing parts 31 and 32. Explaining the exhaust port 8b as an example, the bubble B7 that exits from the exhaust port 8b and the bubble B8, B9 that exits from the adjacent exhaust port 8a or the exhaust port 8c are in contact with each other, and the bubble B7 is affected by that effect. Etc. are likely to be crushed.

  1B and FIG. 1C indicate that the bubble B4 that swells the largest among the bubbles that exit from the exhaust port 8c. As is clear from this illustrated example, the pair of facing portions 31 and 32 and the wall surface portion 33 are provided higher than the bubble that most swells from one exhaust port for all of the exhaust ports 8a to 8e. ing. Even if the bubble swells to the maximum, the bubble B4 can easily get over the pair of facing portions 31, 32, and the wall portion 33 as long as it does not float on the pair of facing portions 31, 32, and the wall portion 33. Can not. Regardless of the regular cooking conditions or non-regular cooking conditions set for the rice cooker, the largest inflatable rice bubble is set on the premise that it is the largest foam that can grow from any of the exhaust ports 8a to 8e. That's fine.

  In the first embodiment, the above-described various blow-off prevention actions prevent the bubble from the exhaust ports 8a to 8e from blowing into the upper surface portion outside the recess of the cap member 15 without depending on the heating power setting of the rice cooker. Can be.

  The scope of the present invention is not limited to the above-described first embodiment, but includes all modifications within the scope of the same technical idea.

  For example, it is not necessary for all the exhaust ports to have the inner surface portion. As illustrated in FIG. 9 as the second embodiment, only one exhaust port 42 among the plurality of exhaust ports 41, 42, 43 is the inner surface. Can be modified to have parts.

  Further, even when the pair of facing portions 31 and 32 are provided, it is not necessary for all the exhaust ports to have the inner surface portion that is continuous from one side and the second inner surface portion that is continuous from the other side. It can change so that it may have only one exhaust port 42 like a form. The more exhaust ports having both inner surface portions, the easier it is to improve the blow-off prevention performance. Therefore, the first embodiment is preferable to the second embodiment.

  Further, as illustrated in the third embodiment in FIG. 10, the redundant wall portion 37 can be provided upstream from the pair of facing portions 31 and 32 and the wall surface portion 33. The redundant wall portion 37 can be employed in accordance with appropriate purposes such as rectification and strength improvement of the upper surface portion of the cap member.

  Further, as illustrated in the fourth embodiment in FIG. 11, all the exhaust ports 51, 52, 53 can be provided so as to have only the inner surface portion. The larger the number of exhaust ports having the inner surface portion, the easier it is to improve the blow-off prevention performance. Therefore, the fourth embodiment is preferable to the second embodiment. Of course, the first embodiment is more preferable than the fourth embodiment in that all exhaust ports have the inner surface portion and the second inner surface portion.

DESCRIPTION OF SYMBOLS 1 Rice cooker 2 Steam path 3 Lid 3a, 3b, 3c, 3d Upper end surface 4 of bottom wall part Heat sink 5 Pressure regulating valve 6 Heater cover 7 Large trapping chamber 8a, 8b, 8c, 8d, 8e, 41, 42, 43 , 51, 52, 53 Exhaust port 9 Pressure sensor 10 Explosion-proof packing 11 Explosion-proof seal portion 12 Inner lid packing 13 Ring member 14 Gap 15 Cap member 16 Collector 17 Upper flow path 18 Steam inflow chamber 19 Partition 20 Notch portion 21 Check Valve 22 Valve hole 23 Valve body 24 Protruding portion 25 Ribs 31, 32 Face-to-face portion 33 Wall surface portion 34 Inner surface portion, second inner surface portion 35 Third inner surface portion 36 Edge portion 37 Redundant wall portions B1-B9

Claims (5)

In the rice cooker having a lid provided with a steam path for guiding the steam in the rice cooker to the atmosphere, the steam path has a plurality of exhaust ports opened to the upper surface of the lid and a common upper flow path,
The plurality of exhaust ports are located at the bottom of a recess provided in the upper surface of the lid,
The inner periphery of the recess is a wall surface perpendicular to the horizontal plane,
Of the plurality of exhaust ports, at least one exhaust port has an inner surface portion that is continuous in the vertical direction from an inner peripheral portion of the recess.   The inner periphery of the recess has a pair of facing portions, and the at least one exhaust port includes the inner surface portion that is continuous in the vertical direction from one side of the pair of facing portions, and the other of the pair of facing portions. The rice cooker of Claim 1 which has a 2nd inner surface part which followed the said perpendicular direction from the side.   3. The rice cooker according to claim 2, wherein the plurality of exhaust ports are arranged at a bottom between the pair of facing portions, and all the exhaust ports have the inner surface portion and the second inner surface portion.   Among the plurality of exhaust ports, an exhaust port located at the end of the plurality of exhaust ports has a third inner surface portion that is continuous in the vertical direction from a wall surface portion that connects the pair of facing portions of the inner periphery of the recess. Item 9. A rice cooker according to item 3.   The rice cooker according to any one of claims 1 to 4, wherein an inner periphery of the recess is provided higher than a bubble that expands most greatly from the exhaust port.

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