WO2017073141A1

WO2017073141A1 - Rice cooker

Info

Publication number: WO2017073141A1
Application number: PCT/JP2016/074089
Authority: WO
Inventors: 善行藤田; 和善根岸; 智也蜷川; 鈴木　康之
Original assignee: 三菱電機株式会社; 三菱電機ホーム機器株式会社
Priority date: 2015-10-30
Filing date: 2016-08-18
Publication date: 2017-05-04
Also published as: JP6552630B2; CN108135383B; TW201729734A; JPWO2017073141A1; TWI637713B; CN108135383A

Abstract

A rice cooker is provided with: an inner pot (5) open at the top and containing rice; a heating means (7) for heating the inner pot; a rice cooker body (1) having an inner pot containing section (1a) for containing the inner pot; and a lid body (30) having an outer lid (31) which covers the rice cooker body from above, the lid body (30) also having an inner lid (32) mounted in a removable manner to the lower surface side of the outer lid. The inner lid is constituted by an upper plate body (32B) and a lower plate body (32A), which are separable from each other, and the inner lid has a space section (320) surrounded by the upper plate body and the lower plate body. The lower plate body has a protrusion (340) protruding toward the opening of the inner pot when the lid body is closed. The sidewall (340A) of the protrusion is provided with an introduction hole (328) for introducing into the space section, steam and a sticky substance which are produced within the inner pot by the heating means during cooking of rice.

Description

rice cooker

The present invention relates to a rice cooker having a configuration that suppresses spillage of rice balls (sticky liquid generated when rice starch is eluted in water (hot water)).

2. Description of the Related Art Conventionally, a rice cooker having a rice trap capture chamber is known as a configuration that suppresses spillage of rice balls (for example, see Patent Document 1).

Japanese Patent Laying-Open No. 2005-65823 (page 4, FIG. 1)

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

This invention was made 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 that has an open upper surface and accommodates rice, a heating means that heats the inner pot, a rice cooker body that has an inner pot accommodating portion that accommodates the inner pot, and the rice cooker. And a lid having an inner lid that is detachably mounted on the lower surface side of the outer lid, and the inner lid is composed of a separable upper plate body and lower plate body. And having a space surrounded by the upper plate body and the lower plate body, the lower plate body projecting toward the opening direction of the inner hook when the lid body is closed In the rice cooking of the rice, the protruding portion is provided with an introduction hole for introducing rice balls and steam generated in the inner pot by the heating means into the space portion.

According to the present invention, since the inner lid is provided with the structure for separating the steam and the steam and storing the power, the spillage of the power and the like can be suppressed without impairing the design.

It is sectional drawing of the rice cooker which concerns on Embodiment 1 of this invention. It is a principal part cross-sectional enlarged view of the rice cooker which concerns on Embodiment 1 of this invention. It is a perspective view of the state where the lid of the rice cooker concerning Embodiment 1 of the present invention was opened. It is a perspective view of the state which isolate | separated the upper cover body and lower cover body which comprise the inner cover of the rice cooker which concerns on Embodiment 1 of this invention. It is the perspective view which looked at the lower board body shown in FIG. 4 from the downward direction (inner hook side). It is the perspective view which looked at the lower board shown in Drawing 4 from the upper part (upper board side). It is the side view of the lower board body seen from the A direction shown in Drawing 5B. FIG. 5B is a cross-sectional view of the lower plate body cut along the line BB shown in FIG. 5B. It is introduction hole principal part sectional drawing of the lower plate body of the rice cooker which concerns on Embodiment 2 of this invention.

Hereinafter, an embodiment of the present invention will be described 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. Moreover, the shape, size, arrangement, and the like of the configurations described in the drawings can be changed as appropriate within the scope of the present invention.

Embodiment 1 FIG.
[rice cooker]
1 is a cross-sectional view of a rice cooker according to Embodiment 1 of the present invention. FIG. 2 is a cross-sectional enlarged view of a main part of the rice cooker according to Embodiment 1 of the present invention. FIG. 3 is a perspective view of the rice cooker according to Embodiment 1 of the present invention with its lid opened.

As shown in FIG.1 and FIG.3, the rice cooker 100 which concerns on Embodiment 1 of this invention is the inner pot 5 with which the upper surface opened, the heating means 7 which heats the inner pot 5, and the inner pot 5 are desorbed. A rice cooker main body 1 having an inner pot accommodating portion 1a that is freely accommodated, an outer lid 31 that covers the upper portion of the rice cooker main body 1 and has a steam discharge port 311 and an inner surface that is detachably mounted on the lower surface side of the outer lid 31 And a lid 30 having a lid 32.

The lid 30 is attached to the rice cooker body 1 so as to be rotatable and openable. The user of the rice cooker opens the lid 30 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. Further, the user of the rice cooker closes the lid 30 and cooks the rice and water to be cooked in the inner pot 5.

(Lid)
The lid 30 is constituted by the outer lid 31 constituting a part of the outer shell as described above, and the inner lid 32 on the inner side of the outer lid 31, in other words, on the inner hook 5 side. The lid body 30 is rotatable to the rice cooker body 1 and can be opened and closed by the connecting mechanism of the hinge portion 6 behind the rice cooker body 1. The lid 30 is urged in the opening direction by a spring 66 attached to the hinge portion 6.

When the lid 30 is rotated in a direction to cover the upper surface of the rice cooker body 1 against the urging force of the spring 66, the latching portion 10 of the lid 30 is provided with a latch piece provided on the rice cooker body 1. 9 and the closed state of the lid 30 is secured and maintained.

When the open button 15 provided on the rice cooker body 1 is pressed, the locking piece 9 is detached from the locking portion 10, and the cover body 30 is rotated in the opening direction by the biasing force of the spring 66. However, the spring 66 does not have an urging force to rotate to the position where the lid 30 is most opened, and is an urging force to the extent that the locking portion 10 is rotated to a position where it does not engage the locking piece 9.

(Inner lid)
As described above, the inner lid 32 is detachably attached to the inner side of the outer lid 31, in other words, to the inner hook 5 side. A circular seal member 12 is provided at a position slightly inside the outer periphery of the inner lid 32. When the lid 30 is closed, the seal member 12 is in contact with the opening end 5d of the inner hook 5 over the entire circumference, and seals between the opening end 5d of the inner hook 5 and the inner lid 32. . The seal member 12 is formed of an elastic material such as silicone resin, for example.

(Lower plate and upper plate of inner lid)
FIG. 4 is a perspective view of the rice cooker according to Embodiment 1 of the present invention in a state in which the upper lid and the lower lid constituting the inner lid are separated. FIG. 5A is a perspective view of the lower plate body shown in FIG. 4 as viewed from below (inner hook side). FIG. 5B is a perspective view of the lower plate shown in FIG. 4 as viewed from above (upper plate side). FIG. 6 is a side view of the lower plate body viewed from the A direction shown in FIG. 5B. FIG. 7 is a cross-sectional view of the lower plate taken along the line BB shown in FIG. 5B.

The inner lid 32 includes a lower plate body 32A and an upper plate body 32B shown in FIG. The lower plate body 32A is formed by a lower plate 321A made of a metal material and a frame body 321B made of a resin material. The upper plate 32B is formed by an upper plate 322A made of a metal material and a frame 322B made of a resin material.

As shown in FIG. 2, a space 320 surrounded by the lower plate 32A and the upper plate 32B is formed in the inner lid 32. The space part 320 has a steam discharge port 311 that is exposed to the outside and discharges steam during cooking to the outside of the main body. The steam discharge part 312 included in the outer lid 31 and a steam discharge hole provided in the upper plate 32B. 327 communicates.

As shown in FIGS. 1 and 3, the inner lid 32 inserts the inner lid locking piece 323 provided on the frame body 322 B of the upper plate 32 B into the inner lid locking portion 313 provided on the outer lid 31. The inner lid claw-like projections 324 provided on the frame body 322B of the upper plate body 32B are hung on the inner lid holding portion 314 provided on the outer lid 31 so as to be held by the outer lid 31.

When the inner lid 32 is removed from the outer lid 31, the inner lid claw-like projection 324 is formed by hooking a finger on the

finger hook portions

315 a and 315 b (see FIG. 4) provided on the frame body 322 B of the upper plate body 32 B. The holder 314 can be detached and removed.

As described above, the inner lid 32 is composed of the lower plate 32A and the upper plate 32B and is separable. The lower plate body 32A and the upper plate body 32B have shapes as shown in FIG. The separation facilitates cleaning of the interior of the space 320 into which rice balls and steam to be described later are introduced.

The lower plate body 32A has a frame body 321B made of a resin material attached to the outer peripheral portion of the lower plate 321A made of a metal material. As shown in FIGS. 4, 5 A, and 5 B, the lower plate body 32 A includes a sealing material 325 that contacts the upper plate body 32 B at the periphery.

When the frame member 321B is attached to the lower plate 321A, the sealing member 325 is configured such that the clamping portion 325b is placed on the sealing member receiving portion 340D that is a flat surface provided on the lower plate 321A as shown in FIG. The holding portion 325b is fixed between the lower plate 321A and the frame body 321B.

The lower plate 321A and the frame body 321B are fixed as appropriate, such as a fixing method using screws, a method in which a claw shape is provided on the lower plate 321A formed of a metal material, and the claws are bent and fixed to the frame body 321B. It is fixed by a possible fixing method.

The lower plate 321A of the lower plate body 32A is formed by drawing a metal material, and is provided with a protruding portion 340. The protruding portion 340 protrudes in the opening direction of the inner pot 5 in a state where the lid 30 is closed, in other words, in a state where the lid 30 closes the upper surface of the rice cooker body 1.

As shown in FIG. 7, the protrusion 340 has a side wall 340A and a bottom surface 340B. Between the side wall 340A and the flat sealing material receiving portion 340D, a reinforcing portion 340C for securing the shape of the lower plate 321A formed of a thin metal plate and increasing the strength is formed.

When the surface of the sealing material receiving portion 340D is used as a reference surface, the reinforcing portion 340C is drawn up to a position where it becomes higher by about 3 mm. Thus, by making a height difference by drawing, the shape of the structure formed of a metal thin plate is secured, and the strength can be improved.

The outer periphery of the sealing material receiving portion 340D, that is, the outer periphery of the lower plate 321A extends over the entire circumference in the same direction as the squeezing-up direction of the reinforcing portion 340C, in other words, in the direction of the back surface of the surface facing the opening direction of the inner hook 5. A bent portion 340F that is bent is provided. The bent portion 340F is bent at substantially the same height as the reinforcing portion 340C or slightly lower than the reinforcing portion 340C. Similar to the reinforcing portion 340C, the bent portion 340F also contributes to securing the shape and improving the strength of the structure formed of a thin metal plate.

Since the reinforcing portion 340C and the bent portion 340F protrude in the direction in which the sealing material 325 is provided as shown in FIG. 7, the holding portion 325b of the sealing material 325 is formed by the rising portion 340E and the bent portion 340F of the reinforcing portion 340C. It is also used for positioning until it fits over the entire circumference and is held down by the frame body 321B.

The protruding portion 340 protrudes in the opening direction of the inner hook 5 from the position where the reinforcing portion 340C is squeezed up. The side wall 340A of the protrusion 340 is inclined toward the bottom surface 340B. Furthermore, it is inclined toward the center direction of the bottom surface 340B.

The side wall 340A and the reinforcing portion 340C are connected over the entire circumference by the curved surface of the side wall and the bottom surface connecting portion 340G, and the side wall 340A and the bottom surface 340B are connected by the curved surface. However, the connection part here is not a mechanical connection, but a part connecting between the side wall 340A and the reinforcing part 340C and between the side wall 340A and the bottom face 340B.

Since the lower plate 321A is formed by drawing metal material, the side wall 340A and the reinforcing portion 340C, the side wall 340A and the bottom surface 340B are respectively connected to the side wall and the reinforcing portion connection portion 340H, and the side wall and the bottom surface are connected. It becomes the structure connected by the curved surface like the part 340G.

The side wall 340A is provided with a plurality of introduction holes 328 as shown in FIGS. 5A, 6 and 7. The introduction hole 328 is an opening for introducing a rice ball and steam generated during rice cooking into the space 320. In addition, if an explanation is given here, it will be said that the sticky liquid of the state which the starch of rice which generate | occur | produced at the time of rice cooking is eluted in water (hot water) is said.

During rice cooking, the inner pot 5 containing rice and water is heated by the heating means 7 described later. As described above, the inner hook 5 abuts the opening end 5d over the entire circumference of the seal member 12 provided on the inner lid 32, and the gap between the opening end 5d of the inner hook 5 and the inner lid 32 is sealed. Yes.

When the inner pot 5 is heated by the heating means 7 and the rice cooking process proceeds, steam is generated and the pressure in the inner pot 5 increases. Since the inner pot 5 has a large amount of steam and steam, it tries to go out of the inner pot 5 by the increased pressure. However, since the gap between the opening end 5d of the inner hook 5 and the inner lid 32 is sealed, the tow and steam are introduced into the space 320 from the introduction hole 328 by the increased pressure.

In the rice ball, bubbles are included, and when passing through the introduction hole 328, a part of the surface of the bubbles passes as a film. When passing, the bubbles are compressed and the flow rate is increased, so that the membrane passing through the introduction hole 328 passes vigorously, and then the membrane expands to become new bubbles. At that time, the membrane expands. The film thickness is reduced. The thinned film cannot withstand the momentum of the vapor and is broken, and the gas (vapor) and the powder in the film are separated.

The separated rice balls flow downward through the side wall 340A inclined from the introduction hole 328 by their own weight, and are stored in the bottom surface 340B. Due to the protruding portion 340, the space 320 has a sufficient volume to store the tow. Since the side wall 340A is inclined, the rice ball is easy to flow toward the bottom surface 340B.

The bottom surface 340B is formed in a curved surface, and a screw return hole 326 for returning the separated screw into the inner pot 5 is provided at the most protruding portion of the curved surface, in other words, at the bottom of the bottom surface. Since rice balls contain umami ingredients that are eluted from rice, returning rice balls will make the rice more delicious.

In the return hole 326, a backflow prevention valve 326a, which is a backflow prevention valve, is attached. When the pressure in the inner hook 5 is high, the backflow prevention valve 326a is pressed against the bottom surface 340B by the pressure to close the return hole 326. Therefore, steam and rice balls do not flow from the return hole 326 and are introduced only from the introduction hole 328.

When the pressure in the inner pot 5 decreases, the backflow prevention valve 326a is pushed downward by the weight of the needle stored in the bottom surface 340B, and is lowered by the gap of the gap 326c. As the gap 326c is lowered by the gap 326c, the hook portion 326b hits the end of the return hole 326, and the backflow prevention valve 326a does not lower any further.

When the backflow prevention valve 326a is lowered, a clearance is formed between the return return hole 326 and the backflow prevention valve 326a, and the contact can flow out of the clearance and is returned to the inner pot 5 below the clearance.

The introduction hole 328 is provided above the side wall 340A, in other words, above the protruding portion 340. By providing the upper portion in this way, the introduction hole 328 is prevented from being blocked by the stored rice cake even if the rice cake is stored on the bottom surface 340B.

The side wall 340A is inclined toward the bottom surface 340B so that the rice ball flows easily. The side wall 340A may be a flat surface, or may be a gently curved surface having an apex inside the space portion 320 or an apex outside the space portion 320, and may be inclined toward the bottom surface 340B. In this case, the rice ball tends to flow to the bottom surface 340B.

In Embodiment 1 of the present invention, a circular hole is illustrated and described as an example of the introduction hole 328. However, the circular hole is not limited to a circular shape, and may be an elliptical hole or a slit-shaped long hole. Any shape can be used as long as it is an opening through which steam can pass. Since the lower plate 321A is formed by drawing a metal material, a round hole extracted before the drawing process is naturally extended to a deformed shape such as an ellipse or an oval shape by drawing. However, it can be used as an introduction hole.

The sealing material 325 sandwiched between the lower plate 321A and the frame body 321B is provided with a lip shape 325a extending obliquely upward and outward from the outer periphery in the outer peripheral direction. The lip shape 325a constitutes a part of the space 320 by contacting the upper plate 322A of the upper plate body 32B.

The lip shape 325a extends upward from the position of the upper plate 322A of the upper plate 32B in a state where the upper plate 32B and the lower plate 32A are attached. Therefore, when the upper plate body 32B and the lower plate body 32A are attached, the lip shape 325a is pressed against the upper plate 322A and strongly sealed, so that the contact portion between the lip shape 325a of the sealing material 325 and the upper plate 322A Steam and rice balls do not enter the space 320.

Also, since the lip shape 325a is flexible with one-side support, providing the lip shape 325a on the seal material 325 allows the lip shape 325a to be raised without pressing the seal material 325 against the upper plate 322A with a strong pressing force. It can be reliably pressed against the plate 322A, and a stable seal can be achieved.

A lower plate body locking portion 330 and a lower plate body holding portion 331 are attached to the upper plate 322A of the upper plate body 32B. The lower plate body locking portion 330 and the lower plate body holding portion 331 are each made of a resin material, and the lower plate body holding portion 331 is movable.

The lower plate body 32A inserts the lower plate body locking piece 332 provided on the frame body 321B into the lower plate body locking portion 330 attached to the upper plate 322A of the upper plate body 32B, and similarly to the frame body 321B. The lower plate body claw-like protrusion 333 provided is fixed by being hung on the lower plate body holding portion 331.

The lower plate body holding portion 331 is biased by an elastic body such as a spring (not shown) in a direction where the lower plate body claw-like protrusion 333 is located. When the lower plate body holding portion 331 is moved to a position where the lower plate body claw-like projection 333 does not engage against this urging force, the lower plate body claw-like projection 333 is detached from the lower plate body holding portion 331, and the lower plate The body 32A can be separated from the upper plate body 32B.

A steam discharge hole 327 is formed in the upper plate body 32B. The steam discharge hole 327 is a hole for discharging the steam separated in the space part 320 to the steam discharge part 312 communicating with the outside. As shown in FIGS. 1 and 2, the steam discharge unit 312 is included in the outer lid 31 and has a steam discharge port 311 that discharges steam to the outside.

(Rice cooker body)
The rice cooker main body 1 has an inner pot accommodating portion 1a whose upper portion is opened. At the upper end of the inner hook accommodating portion 1a, a circular inner hook seal member 1a1 that is held by the inner hook seal member holding member 1a2 and that contacts the lower side of the flange 50 of the inner hook 5 is provided. Yes.

The inner hook seal member 1a1 is in contact with the lower side of the flange portion 50 of the inner hook 5, and the outer surface including the accommodated cylinder portion 5e1 of the inner hook 5 and the inner pot accommodating portion 1a are hermetically sealed so that the temperature is not easily lowered during cooking. The formed space 1b is formed. The inner hook seal member 1a1 is formed of an elastic material such as silicone resin, for example.

The rice cooker body 1 includes an operation unit (not shown), a display unit (not shown), a heating means 7, a temperature sensor 8, and a control means (not shown). For example, the operation unit and the display unit are provided above the lid 30.

The operation unit is for instructing the rice cooker 100 and includes, for example, a touch sensor. 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 near the center of the outer surface side 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, in other words, cooks rice with rice and water, and operates based on instructions 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 7a heats the bottom 5a of the inner pot 5. The second bottom heater 7 b heats the corner portion 5 b of the inner hook 5. In the example of the first embodiment of the present invention, the first bottom heater 7a and the second bottom heater 7b are constituted by induction heating coils, but the first bottom heater 7a and the second bottom heater 7b may be configured by a heating wire or the like. 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 selects the cooking menu, sets the cooking time, or adjusts the heating power based on the instruction information input from the operation unit, and displays the instruction information on the display unit. Further, based on the temperature detection information detected by the temperature sensor 8, the energization from the power supply substrate 40 to the bottom heater (the first bottom heater 7a and the second bottom heater 7b), which is the heating means 7, and the body heater 7c is controlled. To do. 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. 1, the inner hook 5 has a bottom 5a, a cylindrical portion 5c extending to the opening end 5d above the bottom 5a, and a corner portion 5b between the bottom 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 Embodiment 1 of this invention contains the 1st cylinder part 5c1, and the 2nd cylinder part 5c2 extended to the opening edge part 5d above the 1st cylinder part 5c1. It is out. 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 generally bowl-shaped outer shape whose upper end portion is formed smaller than the maximum diameter of the inner hook 5. 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 main body 1, the lower part of the flange 50 of the inner pot 5 is held by the inner pot seal member holding member 1a2 at the upper end of the inner pot accommodating portion 1a. The inner hook 5 is supported in contact with the inner hook seal member 1a1.

The cylinder part 5c below the lower part of the flange part 50 constitutes a receiving cylinder part 5e1 accommodated in the inner pot accommodating part 1a, and the cylinder part 5c above the lower part of the flange part 50 is an inner pot accommodating part 1a. The upper cylinder part 5e2 which protrudes upwards and extends to the opening end part 5d of the inner hook 5 is comprised.

The accommodated cylinder portion 5e1 includes the first cylinder portion 5c1, and a water level display portion that displays a water level (not shown) is provided on the inner periphery of the accommodated cylinder portion 5e1. The upper cylinder portion 5e2 includes a second cylinder portion 5c2, and the inner peripheral surface of the upper cylinder portion 5e2 gradually narrows in the radial direction from the lower side toward the upper opening end portion 5d. It has been.

As shown in FIGS. 1 and 3, the rice cooker body 1 according to Embodiment 1 of the present invention 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. When the inner pot 5 is installed in the inner pot accommodating portion 1a, portions along the circumferential direction of the bowl 50 and the upper bowl cylinder 5e2 protrude upward from the rice cooker body 1.

In addition, the rice cooker main body 1 is the whole circumference of a circumferential direction so that the bowl part 50 and the rice bran upper cylinder part 5e2 may protrude from the upper direction of the rice cooker main body 1 over the circumference of the circumferential direction of the rice cooker main body 1. Further, it may be formed at a height substantially equal to the height of the upper end of the inner hook accommodating portion 1a.

In Embodiment 1 of the present invention, at least portions along the circumferential direction of the bowl 50 and the bowl upper cylinder 5e2 protrude upward from the rice cooker body 1, so that the user of the rice cooker The inner hook 5 can be easily taken out.

As shown in FIG. 1, when the lid 30 is closed, a heat radiation space 13 is formed between the inner circumferential surface of the outer lid 31 and the outer circumferential surface of the upper cylinder portion 5e2. The heat radiation space 13 is a gap formed between the inner peripheral surface of the outer lid 31 and the outer peripheral surface of the upper cylinder portion 5e2.

The rice cooker 100 has a ventilation portion 14 that ventilates the heat radiation space 13 to 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 cover body 30, for example. In addition, the ventilation part 14 may have a configuration such as a hole formed in the rice cooker body 1 or the lid body 30 to ventilate the heat radiation space 13 from the outside of the rice cooker 100.

(Operation)
Next, the operation will be described.
The inner pot 5 containing rice and water is accommodated in the inner pot accommodating portion 1a, the lid 30 is closed, and an operation for starting rice cooking is performed from an operation portion (not shown). Then, the control means energizes the first bottom heater 7a and the second bottom heater 7b with, for example, maximum power to heat the water and rice in the inner pot 5.

The temperature of the water and the rice in the inner pot 5 is the rice temperature. The rice temperature is detected by the temperature sensor 8 detecting the temperature near the center of the outer surface side of the bottom 5a of the inner hook 5. 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). This predetermined time is a water supply period in which water is supplied to the rice.

After the water supply period is over, the control means controls the energization so that the energization amount to the first bottom heater 7a and the second bottom heater 7b becomes the maximum again. Before the rice temperature reaches 100 degrees, a bubble that contains steam is generated.

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

The cylindrical portion 5c of the inner hook 5 includes a receiving cylindrical portion 5e1 accommodated in the inner hook accommodating portion 1a, and an upper cylindrical portion 5e2 protruding upward from the inner hook accommodating portion 1a. A heat radiation space 13 for radiating heat is formed outside the upper cylinder portion 5e2 protruding upward from the inner hook accommodating portion 1a, and the outer peripheral surface of the upper cylinder portion 5e2 is cooled by air.

Therefore, since the foam and steam containing the rice balls that are springed up during the cooking with the rice cooker 100 are cooled by the upper cylinder portion 5e2, the risk of spilling is suppressed. In addition, the thermal radiation space 13 is comprised so that it may ventilate with the exterior of the rice cooker 100 by the ventilation | gas_flowing part 14, and can thermally radiate | emit in the upper cylinder part 5e2.

Furthermore, the inner peripheral surface of the upper cylinder portion 5e2 is gradually narrowed in the radial direction from the lower side toward the upper opening end portion 5d. Therefore, in the first embodiment of the present invention, steam generated during cooking or the like is brought into contact with the inner peripheral surface of the upper cylinder portion 5e2 to condense, and is dropped back into the inner pot 5 for example. It has become.

Then, air bubbles that have risen during cooking and propagated along the inner peripheral surface of the inner pot 5 fall on the inner peripheral surface of the upper cylinder portion 5e2 by its own weight. As a result, in Embodiment 1 of the present invention, the risk of spillage is suppressed. Furthermore, since it is suppressed that the bubble and vapor | steam containing the rice bowl which springed up during the cooking and cooking of Embodiment 1 of this invention are discharged | emitted on the outer side of the inner pot 5, for example, to-be-cooked rice etc. It is possible to cook while keeping the taste of things.

Furthermore, in the first embodiment of the present invention, the lower portion of the flange portion 50 of the inner hook 5 is in contact with the inner hook seal member 1a1 at the upper end of the inner hook accommodating portion 1a over the entire circumference, and heat during cooking or the like. However, the outer surface of the inner pot 5 including the accommodated cylinder portion 5e1 and the inner pot accommodating portion 1a are confined in a sealed space portion 1b in which the temperature is not easily lowered during cooking. .

Therefore, in Embodiment 1 of the present invention, the rice and water to-be-cooked rice contained in the inner pot 5 can be efficiently heated. Furthermore, since the heat at the time of cooking is confined in the space portion 1b below the bowl 50, the heat at the time of cooking does not enter the heat radiation space 13, and the heat radiation space above the bowl 50 13, the upper cylinder part 5e2 can be efficiently cooled.

As described above, according to the rice cooker 100 of the first embodiment of the present invention, the upper surface is opened, the inner pot 5 for storing rice, the heating means 7 for heating the inner pot 5, and the inner pot 5 are stored. A rice cooker body 1 having an inner pot accommodating portion 1a, and an outer lid 31 covering the upper portion of the rice cooker body 1 and a lid body 30 having an inner lid 32 removably attached to the lower surface side of the outer lid 31. The inner lid 32 includes a separable upper plate 32B and lower plate 32A, and has a space 320 surrounded by the upper plate 32B and the lower plate 32A. The lower plate 32A is a lid. When the body 30 is closed, it has a protrusion 340 that protrudes toward the opening direction of the inner pot 5, and the side wall of the protrusion 340 is generated in the inner pot 5 by the heating means 7 during rice cooking. Since there is an introduction hole 380 for introducing the rice ball and steam into the space 320, Be sufficiently accumulated in the space portion 320, it is possible to suppress the boiling over of Oneba.

Further, the protruding portion 340 of the lower plate body 32A has a bottom surface 340B continuous with the side wall 340A in which a tow is stored. The bottom surface 340B is formed with a curved surface, and when the lid body 30 is closed, the protruding surface 340B has a curved surface. Since the rice ball return hole 326 is provided at the lowest position of the constructed bottom surface 340B, the rice rice is more delicious by returning the rice ball containing the umami component eluted from the rice to the inner pot 5. Become.

Then, since the side wall 340A of the protrusion 340 is inclined toward the bottom surface 340B, the screw is easy to flow toward the bottom surface 340B, and the screw return hole 326 located at the lowest position of the bottom surface 340B. It is easy to guide to.

Embodiment 2. FIG.
The rice cooker according to the second embodiment of the present invention is partially different from the rice cooker according to the first embodiment of the present invention in the rice and steam introduction holes, and other configurations are the first embodiment of the present invention. It is the same as the rice cooker concerning. Therefore, here, a different part is demonstrated using FIG. 8, and since description other than that is the same as the rice cooker which concerns on Embodiment 1 of this invention, it abbreviate | omits.

FIG. 8 is a cross-sectional view of the main part of the introduction hole of the lower plate of the rice cooker according to Embodiment 2 of the present invention.
As shown in FIG. 8, an introduction hole 380 for introducing steam and steam into the space 320 (see FIG. 2) is provided on the inclined side wall 340 A connected to the reinforcing portion 340 C of the lower plate 321 A by a curved surface. An edge bent portion 380 A that protrudes toward the inside of the space portion 320 is provided at the edge of the introduction hole 380.

In the rice ball, bubbles are included, and when passing through the introduction hole 380, a part of the surface of the bubbles passes as a film. When passing, the bubbles are compressed and the flow rate is increased, so that the membrane passing through the introduction hole 380 passes through vigorously, and then the membrane expands to become new bubbles. At that time, the membrane expands. The film thickness is reduced. The thinned film cannot withstand the momentum of the vapor and is broken, and the gas (vapor) and the powder in the film are separated.

By providing the edge bending portion 380A in the introduction hole 380, compared to an ordinary introduction hole without the edge bending portion 380A, a rice ball immediately after separation accumulates around the introduction hole 380 and blocks the introduction hole 380. Can be prevented. Moreover, the effect which prevents a bubble from regenerating from the introduction hole 380 by this is also expectable.

1 Rice cooker body, 1a inner pot accommodating part, 1a1 inner pot seal member, 1a2 inner pot seal member holding member, 1b space part, 30 lid, 31 outer lid, 311, steam outlet, 312 steam outlet, 313 inner lid Locking part, 314 Inner lid holding part, 315a finger hanging part, 315b finger hanging part, 32 inner lid, 32A lower plate body, 32B upper plate body, 320 space part, 321A lower plate, 321B upper body, 322A upper plate, 322B frame Body, 323 inner lid locking piece, 324 inner lid claw-shaped protrusion, 325 seal material, 325a lip shape, 325b clamping part, 326, screw return hole, 326a backflow prevention valve, 326b gap part, 326c gap, 327 steam discharge Hole, 328 introduction hole, 330 lower plate body locking portion, 331 lower plate body holding portion, 332 lower plate body locking piece, 333 lower plate Claw-like protrusions, 340 protrusions, 340A side wall (inclined surface), 340B bottom surface, 340C reinforcement part, 340D seal material receiving part, 340E rising part, 340F bending part, 340G side wall and bottom connection part, 340H side wall and reinforcement part Connection part, 380, introduction hole, 380A edge bending part, 5 inner pot, 5a bottom part, 5b corner part, 5c cylinder part, 5c1, first cylinder part, 5c2, second cylinder part, 5d open end part, 5e1 receiving cylinder part, 5e2 Upper cylinder part, 6 hinge part, 66 spring, 7 heating means, 7a first bottom heater, 7b second bottom heater, 7c barrel heater, 8 temperature sensor, 9 locking piece, 10 locking part, 12 Seal member, 13 heat dissipation space, 14 ventilation part, 15 open button, 40 power supply board, 50 collars, 100 rice cooker.

Claims

An inner pot with an open top and containing rice;
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 a lid body that has an inner lid that is detachably attached to the lower surface side of the outer lid,
The inner lid is composed of a separable upper plate body and lower plate body, and has a space portion surrounded by the upper plate body and the lower plate body,
The lower plate body has a protruding portion that protrudes toward the opening direction of the inner hook when the lid body is closed,
A rice cooker provided on the side wall of the protruding portion, with an introduction hole for introducing rice balls and steam generated in the inner pot by the heating means into the space portion in the rice cooking.
The projecting portion of the lower plate body has a bottom surface connected to the side wall, in which the rice bowl is stored, and the bottom surface is formed of a curved surface,
The rice cooker according to claim 1, wherein a return hole is provided at a position that is the lowermost part of the bottom surface that is configured by the curved surface when the lid is closed.
The rice cooker according to claim 2, wherein the return hole has a valve for preventing backflow.
The rice cooker according to claim 2 or 3, wherein a side wall of the protruding portion is inclined toward the bottom surface.
A sealing material that comes into contact with the upper plate body is provided on the periphery of the lower plate body,
The sealing material is placed on a sealing material receiving portion provided on the back side of the surface of the lower plate that faces the opening of the inner hook when the lid is closed;
The rice cooker according to any one of claims 1 to 4, further comprising a reinforcing portion that protrudes in a direction of the sealing material from the sealing material receiving portion of the lower plate body.
A bent portion is provided on the outer periphery of the lower plate constituting the lower plate body, which is bent to the back side of the surface of the lower plate body facing the opening of the inner hook when the lid is closed. Item 6. The rice cooker according to any one of Items 1 to 5.
The rice cooker according to claim 5 or 6, wherein a lip shape extending obliquely upward in the outer peripheral direction is provided at a location where the sealing material comes into contact with the upper plate body.
The rice cooker according to any one of claims 1 to 7, wherein a plurality of the introduction holes are provided.
The rice cooker according to any one of claims 1 to 8, wherein an edge bent portion protruding toward the inside of the space portion is provided at a peripheral edge of the introduction hole.