JP6448372B2 - rice cooker - Google Patents

Description

  The present invention relates to a rice cooker having a configuration that suppresses blow-off of rice balls and the like.

  2. Description of the Related Art Conventionally, a rice cooker equipped with a rice ball cartridge is known as a configuration that suppresses spillage of rice balls and the like. (For example, see Patent Document 1)

Japanese Patent No. 5334705

  However, in the conventional rice cooker, there is a problem that the cartridge is disposed on the upper surface of the lid, and there is a possibility that the appearance may be impaired on the design surface.

  This invention is made | formed in order to solve said subject, and it aims at providing the rice cooker which can suppress blowing over, such as if it does not impair the designability.

The rice cooker according to the present invention includes an inner pot whose upper surface is opened, a heating means for heating the inner pot, a rice cooker body having an inner pot accommodating portion for accommodating the inner pot, and an upper portion of the rice cooker body. comprising a lid having an inner lid that is removably attached to the lower surface side of the outer lid and the outer lid having a cover steam outlet, wherein the inner lid is composed of separable upper and lower plates And a space portion surrounded by the upper plate and the lower plate, and the lower plate includes a steam introduction hole for introducing a bowl and steam generated in the inner pot by the heating means into the space portion. The upper plate is provided with a steam discharge hole for discharging steam separated from the space in the space portion to the outside, and the position in the horizontal plane where the steam discharge hole is formed is located above the opening of the steam introduction hole. The steam exhaust hole so that it does not overlap the projected area The space portion has a narrow portion that narrows the height dimension of the space portion between the positions where the steam introduction hole and the steam discharge hole are formed, and the narrow portion is It is characterized by being a wall erected in the space .

  According to this invention, since the structure which isolate | separates a rice ball and a vapor | steam was provided in the inner lid, it is possible to suppress the spilling of the rice ball and the like without impairing the design.

It is sectional drawing of the rice cooker which concerns on Embodiment 1 of this invention. It is a perspective view of the inner hook described in FIG. It is the perspective view which looked at the state which opened the upper board and lower board of the inner cover described in FIG. 1 from upper direction. It is the perspective view which looked at the lower board of the inner cover described in FIG. 3 from upper direction. FIG. 5 is a cross-sectional view taken along a line II and a line II-II in FIG. 4 in a state where an upper plate and a lower plate of the inner lid shown in FIG. 3 are closed. It is an expanded sectional perspective view of the A section of FIG. It is sectional drawing of the sealing member provided between an upper board and a lower board. It is sectional drawing of the steam exhaust port formed in the upper cover as described in FIG.

  Embodiments of the present invention will be described below with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals, and the description thereof is omitted or simplified as appropriate. In addition, the shape, size, arrangement, and the like of the configuration described in each drawing can be changed as appropriate within the scope of the present invention.

Embodiment 1 FIG.
[rice cooker]
1 is a cross-sectional view of an example of a rice cooker according to Embodiment 1 of the present invention. FIG. 2 is an oblique view of the inner hook shown in FIG. FIG. 3 is a perspective view of the state in which the upper and lower plates of the inner lid shown in FIG. 4 is a perspective view of the lower plate of the inner lid shown in FIG. 3 as viewed from above. 5 is a cross-sectional view taken along a line II and a line II-II in FIG. 4 in a state where the upper plate and the lower plate of the inner lid shown in FIG. 3 are closed. FIG. 6 is an enlarged cross-sectional perspective view of a portion A in FIG. FIG. 7 is a cross-sectional view of a seal member provided between the upper plate and the lower plate. FIG. 8 is a cross-sectional view of the steam outlet formed in the upper lid shown in FIG.

  As shown in FIG. 1, a rice cooker 100 according to this embodiment includes an inner pot 5 whose upper surface is open, a heating means 7 for heating the inner pot 5, and an inner pot housing for detachably storing the inner pot 5. A lid 20 having a rice cooker body 1 having a portion 1a, an outer lid 21 that covers the upper portion of the rice cooker body 1, and has a steam outlet 211, and an inner lid 22 that is detachably mounted on the lower surface side of the outer lid 21. And. The lid 20 is attached to the rice cooker body 1 so as to be freely opened and closed. The user of the rice cooker opens the lid 20 and installs the inner pot 5 in the inner pot accommodating portion 1a, or takes out the inner pot 5 from the inner pot accommodating portion 1a. In addition, the user of the rice cooker closes the lid 20 and cooks an object to be cooked such as rice prepared in the inner pot 5.

[Lid]
The lid 20 has an outer lid 21 and an inner lid 22. The outer lid 21 covers the upper portion of the rice cooker body 1 and the opening of the inner pot 5. The outer lid 21 is attached to the rice cooker body 1 so as to be openable and closable behind the rice cooker body 1 by a connecting mechanism of the hinge portion 6. An inner lid 22 is detachably mounted on the lower surface side of the outer lid 21. A ring-shaped seal member 12 is disposed on the lower surface side of the outer lid 21. When the lid 20 is closed, the seal member 12 comes into contact with the opening end 5d of the inner hook 5 and seals between the opening end 5d of the inner hook 5 and the inner lid 22. The seal member 12 is formed of an elastic material such as silicon resin, for example.

  As shown in FIG. 3, the inner lid 20 includes a lower plate 22A formed of sheet metal and an upper plate 22B formed of sheet metal. The lower plate 22A and the upper plate 22B are separable and easy to clean. For example, one inner lid hinge portion (not shown) is provided on the steam discharge hole 227 side formed on the upper plate 22B, which will be described later, and the upper plate locking portion 228 formed on the upper plate 22B is provided on the other side. The lower plate 22A and the upper plate 22B are kept closed by engaging with a lower plate locked portion (not shown) formed on the plate 22A. When the lower plate 22A and the upper plate 22B are closed, a space 220 surrounded by the upper surface of the lower plate 22A and the lower surface of the upper plate 22B is formed (see FIG. 5).

  The lower plate 22A has a dish shape with the center recessed downward. The lower plate 22A is connected to the recessed portion 221a whose center portion is convex downward, the outer portion of the recessed portion 221a, the upper surface is connected to the flat portion 221b, the flat portion 221b, and protrudes upward from the flat portion 221b. A protruding portion 221c is formed. Since the recessed portion 221a is provided in the lower plate 22A, the volume of the space portion 220 is increased, and as will be described later, the rice introduced into the space portion 220 can be sufficiently stored. The center of the recess 221a is the lowest position on the upper surface of the lower plate 22A. A screw return hole 223 for returning the screw separated from the steam in the space 220 to the inner pot 22 is disposed at the center of the recess 221a. Therefore, the tobe separated from the steam in the space portion gathers in the toy return hole 223 which is the lowest position on the upper surface of the lower plate 22A due to its own weight. The on-off valve 11 is provided below the return hole 223. The on-off valve 11 is moved up and down by the pressure inside the inner hook 5. During cooking, the pressure in the inner pot 22 is higher than the pressure in the space 220, and the on-off valve 11 is closed. When rice cooking is completed, the pressure in the inner pot 22 is reduced, the opening / closing valve 11 is opened by the weight of the pot that has accumulated in the recess 221 a, and the pot is returned to the pot 22.

  A plurality of steam introduction holes 222 are formed in the protruding portion 221c in the lower plate 22A (see FIGS. 3 and 4). The steam introduction hole 222 is for introducing the steam including the tooth generated in the inner pot 5 by the heating means 7 into the space 220. That is, the steam introduction hole 222 is formed above the lowest position on the upper surface of the lower plate 22A. Therefore, it is possible to prevent the steam separated in the space 220 from blocking the steam introduction hole 222.

  Nineteen steam introduction holes 222 are formed in the lower plate 22A so as to surround the return holes 223. The diameter of the steam introduction hole 222 is about 3 mm. Since the flow rate increases when the bubble of the rice cake passes through the small diameter steam introduction hole 222, the bubble bursts and is separated into the vapor and the rice cake. Further, the total area of the steam inlets 222 is set to be larger than the total area of the steam discharge holes 27.

  On the inner lid hinge portion side of the lower plate 22A, a resin narrow portion 225 in which the dimension of the space portion 220 in the height direction is narrowed is provided. A gap G is formed between the upper end of the narrow portion 225 and the lower surface of the upper plate 22B (see FIG. 5B). The bubble that has not been separated from the steam and has advanced to the inner lid hinge part side having the steam discharge hole 227 is returned to the steam introduction hole 222 side by the narrowed part 225 and is prevented from reaching the steam discharge hole 227. Is done. The narrow portion 225 is provided on the lower plate 22A side, and a return portion 225a extending toward the steam introduction hole 222 is formed at the upper end. The small bubbles pushed out into the large bubbles without being separated from the steam enter under the return portion 225 a, and the small bubbles are prevented from reaching the steam discharge hole 227. Then, only the steam passes through the gap G and is discharged to the outside of the space part 220 from the steam discharge hole 227 formed in the upper plate 22B.

As shown in FIG. 7A, a resin wall 224 extending upward is formed on the periphery of the lower plate 22A, and a seal member 224a is provided on the upper end of the wall 224. The seal member 224a is made of an elastic material such as silicon resin. The seal member 224a is in pressure contact with the lower surface of the opposing upper plate 22B and seals the periphery of the space 220. The cross section of the seal member 224a is formed in a ring shape having a crush margin 224b (see FIGS. 6 and 7). Since the cross section of the sealing member 224a is formed in a ring shape having a crushing margin 224b, the periphery of the space 220 is efficiently sealed. Therefore, all of the rice bowl and steam of the inner pot 5 having high pressure are introduced into the space through the steam introduction hole 222 during rice cooking, and the rice bowl is efficiently separated from the steam.
As shown in FIG. 7B, the seal member 224a may form a fin portion 224a1 extending outwardly above the seal member 224a. During rice cooking, the pressure in the inner pot 22 is higher than the pressure in the space 220, and a force is applied in the direction of pushing the fin portion 224a1 from the outside. Therefore, since the fin part 224a1 is pressed against the lower surface of the upper plate 22B, the periphery of the space part 220 can be sealed more effectively.

  A groove 224c is formed at the lower end of the wall 224. A bent portion 221d that is bent upward is formed on the periphery of the lower plate 22A (see FIG. 6). By fitting the bent portion 221d into the groove portion 224, the wall portion 224 is fixed to the lower plate 22A, and the lower end of the wall portion 224 is sealed.

  In addition, a resin inner lid locking piece 226 that locks the inner lid 22 to the lower surface of the upper lid 21 is provided at the end of the lower plate 22A opposite to the inner lid hinge portion. On the lower surface of the upper lid 21, a resin upper lid locking piece 213 for locking the inner lid locked piece 226 is provided. The upper lid locking piece 213 is urged clockwise in FIG. 1 by a spring (not shown). When the inner lid 22 is attached to the lower surface of the upper lid 21, the inclined portion 226 a of the inner lid locked piece 226 rubs against the lower end of the locking portion 213 a of the upper lid locking piece 213 against the biasing force of the spring. Then, the upper lid locking piece 213 is rotated counterclockwise, and the hook-shaped locking portion 213 a formed at one end of the upper lid locking piece 213 moves the hook portion 226 b at the tip of the inner lid locking piece 226. Lock (see FIG. 5). When the inner lid 22 is removed from the lower surface of the upper lid 21, the front end portion 213b of the upper lid locking piece 213 is rotated counterclockwise against the biasing force of the spring to release the locking.

  The upper plate 22B has a substantially flat bottom surface, and a steam discharge hole 227 is formed on the inner lid hinge portion side. The steam discharge hole 227 is a hole for discharging the steam separated from the space 220 to the outside. In the first embodiment, nine steam discharge holes 227 are formed in the upper plate 22B. The position in the horizontal plane where the steam discharge hole 227 is formed is formed on the upper plate 22B so as not to overlap the region where the opening of the steam introduction hole 222 is projected upward. Accordingly, it is possible to suppress the steam and bubbles including the rice bowl introduced from the steam introduction hole 222 from being directly discharged to the outside of the space part 220 via the steam discharge hole 227.

  A narrow portion 227 is disposed between the steam discharge hole 227 and the steam introduction hole 222. The narrow portion 227 is formed so as to surround a region where the opening of the steam discharge hole 227 is projected downward. Accordingly, it is possible to suppress the steam and bubbles including the rice bowl introduced from the steam introduction hole 222 from being directly discharged to the outside of the space part 220 via the steam discharge hole 227.

  Further, the upper plate 22B is provided with an upper lid locking portion 228 at the end opposite to the inner lid hinge portion. The upper lid locking portion 228 formed on the upper plate 22B is locked with the lower lid locked portion (not shown) formed on the lower plate 22A, and the lower plate 22A and the upper plate 22B are kept closed. To do.

  Above the steam discharge hole 227, a steam discharge portion 212 formed in the outer lid 21 is provided. The steam discharge part 212 has a shape that narrows upward. At the upper end, a steam discharge port 211 is formed through which the steam introduced from the space 220 through the steam discharge hole 227 into the steam discharge unit 212 is discharged to the outside of the lid 20. The steam discharge part 212 has a vertical part 212 a that is substantially vertical on the inner wall of the lid 20 on the hinge part side. The inner wall on the opposite side has an inclined portion 212b that is inclined in a direction away from the hinge portion 6 of the lid 20 downward. The inclined portion 212b is provided with a blindfold rib 212c that hangs downward. The blind rib 212c is arranged in a straight line connecting the steam discharge port 211 and the steam discharge hole 227. Therefore, when bubbles enter the steam discharge portion 212 from the steam discharge hole 227, it is possible to suppress the bubbles from breaking and splashing from the steam discharge port 211 to the outside of the outer lid 21.

[Rice cooker body]
The rice cooker main body 1 has an inner pot accommodating portion 1a whose upper portion is opened. The upper end of the inner hook accommodating portion 1 a constitutes a hook support portion 1 a 1 that supports the lower side of the hook portion 50 of the inner hook 5. A ring-shaped inner hook seal member 1a2 that is in contact with the lower side of the hook portion 50 of the inner hook 5 is disposed on the hook support portion 1a1. The inner hook seal member 1a2 seals between the lower side of the flange portion 50 and the flange support portion 1a1, and is formed of an elastic material such as silicon resin, for example. When the inner pot 5 is installed in the rice cooker main body 1, the space between the outside of the inner pot 5 and the inner side of the inner pot accommodating portion 1 a is sealed below the flange portion 50 of the inner pot 5.

  Moreover, the rice cooker main body 1 contains the operation part (not shown), the display part (not shown), the heating means 7, the temperature sensor 8, and the control means (not shown). For example, the operation unit and the display unit are provided above the lid 20. An operation part performs the instruction | indication to the rice cooker 100, for example, is comprised by the touch sensor etc. The user of the rice cooker can operate the operation unit to give instructions such as selecting a cooking menu, setting cooking time, or adjusting the heating power. A display part displays the state of the rice cooker 100, etc., for example, is comprised by the liquid crystal panel etc. The operation unit and the display unit may be configured by a touch panel in which these are integrally formed. The temperature sensor 8 detects the temperature in the vicinity of the center of the bottom 5a of the inner hook 5, and is composed of, for example, a thermistor. The control means controls the entire rice cooker 100 as described later, and includes, for example, a CPU or a dedicated IC.

  The heating means 7 heats the inner pot 5 and operates based on an instruction from the control means. The heating means 7 includes, for example, a first bottom heater 7a, a second bottom heater 7b, and a body heater 7c. The first bottom heater 7a and the second bottom heater 7b are collectively referred to as a bottom heater. The first bottom heater 7 a heats the bottom 5 a of the inner hook 5. The second bottom heater 7 b heats the corner portion 5 b of the inner hook 5. In the example of this embodiment, the first bottom heater 7a and the second bottom heater 7b are constituted by induction coils, but the first bottom heater 7a and the second bottom heater 7b are electrically connected. You may be comprised with the heat ray | wire etc. The trunk heater 7c heats the cylindrical portion 5c of the inner hook 5, and is constituted by, for example, a cord heater.

  The control means performs selection of the cooking menu, setting of the cooking time, adjustment of the heating power, etc. based on the instruction information input from the operation unit, and displays the instruction information on the display unit. Further, based on temperature detection information detected by the temperature sensor 8, energization to the bottom heater (the first bottom heater 7 a and the second bottom heater 7 b) that is the heating means 7 and the body heater 7 c is controlled. The energization power to the bottom heater and the body heater 7c is controlled by turning on / off the energization of each heater and adjusting the energization ratio.

[Inner pot]
As shown in FIG. 2, the inner hook 5 has a bottom portion 5a, a cylindrical portion 5c extending to the opening end portion 5d above the bottom portion 5a, and a corner portion 5b between the bottom portion 5a and the cylindrical portion 5c. It is a bottom cylindrical cooking container. The inner hook 5 is formed, for example, by cutting out a baked carbon material. The inner hook 5 may be formed of, for example, a metal such as iron, aluminum, or copper, or an alloy containing these, and in that case, is formed through processes such as casting and cutting.

  The cylinder part 5c of the inner pot 5 of the rice cooker 100 of this embodiment includes a first cylinder part 5c1 and a second cylinder part 5c2 that extends to the opening end part 5d above the first cylinder part 5c1. The 1st cylinder part 5c1 has an internal peripheral surface formed in the substantially linear shape along the up-down direction. The second cylinder portion 5c2 has an inner peripheral surface gradually narrowed in the radial direction while going from the lower side toward the upper opening end portion 5d. Further, the outer peripheral surfaces of the first cylindrical portion 5c1 and the second cylindrical portion 5c2 are formed in substantially the same shape as the respective inner peripheral surfaces. That is, the outer peripheral surface of the first cylinder part 5c1 is formed in a substantially linear shape along the vertical direction, and the outer peripheral surface of the second cylinder part 5c2 is directed from the lower side toward the upper opening end part 5d. It is gradually narrowed in the direction. That is, the inner hook 5 has a substantially bowl-shaped outer shape whose upper end portion is formed smaller than the maximum diameter of the inner hook 5. Further, a flange 50 is provided on the outer peripheral surface of the inner hook 5. The collar part 50 protrudes outward from the outer peripheral surface of the second cylinder part 5c2.

[Installation of the inner pot on the rice cooker body]
As shown in FIG. 1, when the inner pot 5 is installed in the rice cooker body 1, the lower portion of the hook portion 50 of the inner pot 5 comes into contact with the hook support portion 1 a 1 at the upper end of the inner pot receiving portion 1 a, 5 is supported by the heel support 1a1. The cylinder part 5c below the lower part of the flange part 50 constitutes a receiving cylinder part 5e1 (see FIG. 2) accommodated in the inner hook accommodating part 1a, and the cylinder part 5c above the lower part of the flange part 50 is A protruding cylinder portion 5e2 that protrudes upward from the inner hook accommodating portion 1a and extends to the opening end portion 5d of the inner hook 5 is configured. The accommodated cylinder portion 5e1 includes the first cylinder portion 5c1, and a water level display portion 54 for displaying the water level is disposed on the inner peripheral portion of the accommodated cylinder portion 5e1 as shown in FIG. Has been. The protruding cylinder portion 5e2 includes the second cylinder portion 5c2, and the inner peripheral surface of the protruding cylinder portion 5e2 is gradually narrowed in the radial direction from the lower side toward the upper opening end portion 5d. Yes.

  As shown in FIG. 1, the rice cooker main body 1 according to this embodiment has a portion having a height substantially equal to the height of the upper end of the inner pot accommodating portion 1 a on the side. Is installed in the inner pot accommodating portion 1a, the portions along the circumferential direction of the flange portion 50 and the protruding cylindrical portion 5e2 protrude upward from the rice cooker body 1. In addition, the rice cooker main body 1 is placed on the entire circumference in the circumferential direction so that the bowl 50 and the protruding cylinder 5e2 protrude from the upper side of the rice cooker main body 1 over the entire circumference in the circumferential direction of the rice cooker main body 1. It may be formed so as to have a height substantially equal to the height of the upper end of the inner hook accommodating portion 1a. In this embodiment, since at least the portions along the circumferential direction of the bowl 50 and the protruding cylinder 5e2 protrude upward from the rice cooker body 1, the user of the rice cooker holds the bowl 50 The inner hook 5 can be easily taken out.

  As shown in FIG. 1, when the lid 20 is closed, a heat radiation space 13 is formed between the inner circumferential surface of the outer lid 21 and the outer circumferential surface of the protruding cylinder portion 5 e 2. The heat radiation space 13 is a gap formed between the inner peripheral surface of the outer lid 21 and the outer peripheral surface of the protruding cylindrical portion 5e2. The rice cooker 100 has a ventilation portion 14 that allows the heat radiation space 13 to ventilate the outside of the rice cooker 100. The ventilation part 14 is the clearance gap formed between the rice cooker main body 1 and the outer cover 21, for example. The ventilation portion 14 may have a configuration such as a hole formed in the rice cooker main body 1 or the lid body 20 for ventilating the heat radiation space 13 from the outside of the rice cooker 100.

Next, the operation will be described.
The inner pot 2b containing rice and water is accommodated in the inner pot accommodating portion 1a, the lid 20 is closed, and the operation of starting rice cooking is performed from the operation portion 3. Then, the control means energizes the bottom heaters 7a and 7b with the maximum power, for example, and heats the water and rice in the inner pot 2b. The temperature of water and rice in the inner pot 2b is set as the rice temperature. The temperature sensor 8 detects the rice temperature. When the rice temperature rises to a temperature of around 60 degrees, the control means reduces the energization ratio to the bottom heater and maintains the rice temperature at around 60 degrees for a predetermined time (for example, about 15 minutes). During this water supply period, water is supplied to the rice.

  After the end of the water supply period, the control means controls the energization so that the energization amount to the bottom heaters 7a and 7b becomes the maximum again. Steam bubbles containing rice balls are generated before the rice temperature reaches 100 degrees.

  When the rice temperature reaches 100 degrees, the control means reduces the energization amount of the bottom heaters 7a and 7b from the maximum value over the dry-up period and the uneven period. Furthermore, the control means 10 controls to energize the trunk heater 7c with a predetermined energization amount.

  The cylinder part 5c of the inner hook 5 includes a receiving cylinder part 5e1 accommodated in the inner pot accommodating part 1a and a protruding cylinder part 5e2 protruding upward from the inner pot accommodating part 1a. A heat radiating space 13 for radiating heat is formed outside the protruding cylindrical portion 5e2 projecting upward from the inner pot accommodating portion 1a, and steam containing rice balls before the rice temperature reaches 100 degrees The outer peripheral surface of the protruding cylinder part 5e2 is cooled with air. Therefore, since the foam and the steam which were springed up during the cooking with the rice cooker 100 are cooled by the protruding cylinder part 5e2, the risk of spilling is suppressed. Preferably, the heat radiation space 13 is configured to ventilate the outside of the rice cooker 100 through the ventilation portion 14, and can efficiently dissipate heat in the protruding cylinder portion 5e2.

  Furthermore, the inner peripheral surface of the protruding cylindrical portion 5e2 is gradually narrowed in the radial direction from the lower side toward the upper opening end portion 5d. Therefore, in this embodiment, steam generated during cooking or the like is brought into contact with the inner peripheral surface of the protruding cylindrical portion 5e2 to condense and is returned, for example, dropwise to the inside of the inner pot 5. Furthermore, the foam that has risen during cooking and has propagated along the inner peripheral surface of the inner pot 5 falls by its own weight on the inner peripheral surface of the protruding cylindrical portion 5e2. As a result, in this embodiment, the risk of spillage is suppressed. Furthermore, in this embodiment, since bubbles and steam that have risen during cooking are suppressed from being discharged to the outside of the inner pot 5, cooking is performed by confining the taste of a cooked item such as rice. It can be performed.

  In this embodiment, the heating means 7 for heating the accommodated cylinder portion 5e1 is disposed outside the accommodated cylinder portion 5e1. For this reason, in this embodiment, the to-be-heated material prepared for the inner pot 5 can be efficiently heated.

  Furthermore, in this embodiment, the lower part of the hook part 50 of the inner pot 5 is in contact with the hook support part 1a1 at the upper end of the inner pot accommodating part 1a over the entire circumference, so that heat during cooking is generated. , And is confined below the flange 50. Therefore, in this embodiment, the cooking object such as rice prepared in the inner pot 5 can be efficiently heated. Furthermore, in this embodiment, since heat during cooking is confined below the flange 50, the protruding cylinder 5e2 is efficiently cooled in the heat radiation space 13 above the flange 50. be able to.

  In the inner pot 5, what cannot be separated from the steam is introduced into the space portion 220 of the inner lid 22 through a plurality of steam introduction holes 222 formed in the lower plate 22 </ b> A of the inner lid 22. The steam separated in the space 220 is discharged to the outside of the space 220 through a plurality of steam discharge holes 227 formed in the upper plate 22B of the inner lid 22. Above the steam discharge hole 227, a steam discharge portion 212 formed in the outer lid 21 is disposed. A steam discharge port 211 is formed at the upper end of the steam discharge hole 227, and the steam introduced from the steam discharge hole 227 into the steam discharge unit 212 is discharged from the steam discharge port 211 to the outside of the lid 20.

  When rice cooking is completed, the pressure in the inner pot 22 is reduced, the opening / closing valve 11 is opened by the weight of the pot that has accumulated in the recess 221 a, and the pot is returned to the pot 22.

Thus, according to the rice cooker of Embodiment 1, the inner pot whose upper surface is opened, the heating means for heating the inner pot, the rice cooker body having the inner pot accommodating portion for accommodating the inner pot, An outer lid that covers the upper portion of the rice cooker body and has a steam outlet and a lid body that has an inner lid that is detachably attached to the lower surface of the outer lid. The inner lid is made up of a separable upper and lower plates. And having a space portion surrounded by the upper plate and the lower plate, and forming a steam introduction hole in the lower plate for introducing the tobacco and steam generated in the inner pot by the heating means into the space portion. In the upper plate, a steam discharge hole that discharges the steam separated from the rice ball to the outside is formed on the upper plate. Spilling can be suppressed.
In addition, the inner lid is detachably mounted on the lower surface side of the outer lid, and the inner lid is constituted by the separable upper and lower plates, so that cleaning becomes easy.

  In addition, since the steam introduction hole is formed above the lowest position on the upper surface of the lower plate, it is possible to prevent the rice balls separated in the space from blocking the steam introduction hole.

  In addition, since the steam discharge hole is formed on the upper plate so that the position in the horizontal plane where the steam discharge hole is formed does not overlap the region where the opening of the steam introduction hole is projected upward, the steam introduction hole introduced from the steam introduction hole It is possible to suppress the steam and bubbles including nebula from being discharged to the outside of the space portion directly through the steam discharge hole.

  In addition, since the narrow part where the dimension in the height direction of the space part is narrowed is provided between the position where the steam introduction hole and the steam discharge hole are formed, the bubble that is not separated from the steam reaches the steam discharge hole. Can be suppressed.

  In addition, the narrow part is provided on the lower plate side, and since a return part extending to the steam introduction hole side is formed at the upper end, a small bubble pushed into a large bubble without being separated from the steam enters under the return part, It is possible to suppress a small bubble from reaching the steam discharge hole 227.

  Moreover, since the sealing member is disposed between the peripheral edges of the upper plate and the lower plate, the space portion is sealed. Therefore, all the pots and steam of the inner pot with high pressure are introduced into the space through the steam introduction hole during rice cooking, and the seeds can be efficiently separated from the steam.

  Moreover, since the cross section of the sealing member is formed in a ring shape having a crushing margin, the periphery of the space can be efficiently sealed.

  Moreover, since the fin part extended in the outward direction was formed in the seal member, the fin part is pressed against the lower surface of the upper plate, and the periphery of the space part can be sealed more effectively.

  In addition, since the blindfold ribs are provided in a straight line connecting the steam discharge port formed in the outer lid and the steam discharge hole, it is possible to suppress the splash of bubbles that have entered from the steam discharge hole from being scattered outside the outer lid.

In addition, although the example of the rice cooker provided with the inner pot which has a collar part was demonstrated in Embodiment 1, it can be applied also to the rice cooker provided with the inner pot without a collar part.
Further, although the steam introduction hole is a small hole, it may be constituted by a slit. Moreover, you may comprise in a cylindrical shape.

  DESCRIPTION OF SYMBOLS 1 Rice cooker main body, 1a Inner pot accommodating part, 1a1 Rice bran support part, 1a2 Inner pot seal member, 20 Lid body, 21 Outer cover, 211 Steam exhaust port, 212 Steam exhaust part, 212a Vertical part, 212b Inclined part, 212c Blindfold Rib, 213 Upper lid locking piece, 213a Locking portion, 213b Tip, 22 Inner lid, 22A Lower plate, 22B Upper plate, 220 Space portion, 221a Recessed portion, 221b Flat portion, 221c Protruding portion, 222 Steam introduction hole, 223 return hole, 224 wall part, 224a seal member, 224a1 fin part, 224b crushing allowance, 224c groove part, 225 narrow part, 225a return part, 226 inner lid locking piece, 226a inclined part, 226b slant part, 227 Steam discharge hole, 228 Upper plate locking portion, 5 Inner hook, 5a Bottom portion, 5b Corner portion, 5c Tube portion, 5c1 First Part, 5c2 second cylinder part, 5d open end part, 5e1 receiving cylinder part, 5e2 projecting cylinder part, 6 hinge part, 7 heating means, 7a first bottom heater, 7b second bottom heater, 7c trunk heater, 8 Temperature sensor, 11 On-off valve, 12 Seal member, 13 Heat radiation space, 14 Ventilation part, 50 collar part, 100 Rice cooker, G Gap.

Claims (7)

An inner pot with an open top;
Heating means for heating the inner pot;
A rice cooker body having an inner pot accommodating portion for accommodating the inner pot;
An outer lid that covers the upper portion of the rice cooker body and has a steam outlet, and a lid body that has an inner lid that is detachably attached to the lower surface side of the outer lid,
The inner lid,
It is composed of a separable upper plate and lower plate, and has a space part surrounded by the upper plate and the lower plate,
The lower plate is
Provided with a steam introduction hole for introducing into the space a bowl and steam generated in the inner pot by the heating means;
The upper plate is
Provided with a steam discharge hole for discharging the steam separated from the mouth in the space part to the outside ,
The position in the horizontal plane where the steam discharge hole is formed is
The steam discharge hole is formed in the upper plate so as not to overlap with the region projected upward of the steam introduction hole,
The space portion is
Between the position where the steam introduction hole and the steam discharge hole are formed, a narrow portion that narrows the dimension in the height direction of the space portion,
The narrow portion is
A rice cooker characterized by being a wall erected in the space .   The rice cooker according to claim 1, wherein the steam introduction hole is formed above a lowest position on the upper surface of the lower plate. The narrow portion,
The rice cooker according to claim 1 or 2 , wherein the wall is erected on the lower plate side , and a return portion extending toward the steam introduction hole is formed at an upper end. The rice cooker according to any one of claims 1 to 3 , wherein a sealing member is disposed between the peripheral edges of the upper plate and the lower plate. The rice cooker according to claim 4 , wherein a cross section of the seal member is formed in a ring shape having a crushing allowance. The rice cooker according to claim 4 or 5 , wherein the seal member has a fin portion extending outwardly above the seal member. The rice cooker according to any one of claims 1 to 6 , wherein a blindfold rib is provided in a straight line connecting the steam discharge port formed in the outer lid and the steam discharge hole.

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