JP2023100051A - Inner pot and rice cooker - Google Patents

Abstract

To provide an inner pot capable of suppressing boiling over without damaging heat insulation properties and heat storage properties, and a rice cooker.SOLUTION: An inner pot used for a rice cooker includes: a bottom face part; a cylindrical side face part extending upward from the bottom face part; and a flange part which protrudes outward from an outer peripheral surface of the side face part and extends upward. An inner peripheral surface of the side face part and an inner peripheral surface of the flange part continue stepwise via an upper end face of the side face part. The inner peripheral surface of the side face part has an inclination part which is gradually inclined inward and upward from an inclination start point part.SELECTED DRAWING: Figure 3

Description

The present disclosure relates to an inner pot and a rice cooker provided with this inner pot.

In conventional rice cookers, various ideas have been devised for the shape of the inner pot in order to suppress boiling over. For example, the inner pot of the rice cooker disclosed in Patent Document 1 has a flange formed on the upper end side of the side portion so as to protrude outward from the outer periphery of the side portion via a boundary portion having an annular step shape. have a department. When the sticky matter generated at the time of boiling rises along the inner surface of the inner pot, it temporarily climbs over the step at the boundary, thus suppressing the upward momentum. Therefore, boiling over is suppressed.

JP 2020-199179 A

However, in the inner pot of Patent Literature 1, the opening of the flange is widened through the boundary, so the upper space of the inner pot is widened. For this reason, there was a problem that the inner pot was cooled excessively and the rice cooking temperature did not rise.

An object of the present disclosure is to solve the problems described above, and to provide an inner pot and a rice cooker that can suppress boiling over without impairing heat retention and heat storage.

The inner pot according to the present disclosure includes a bottom portion, a cylindrical side portion extending upward from the bottom portion, and a collar portion that protrudes outward from the outer peripheral surface of the side portion and extends upward. The surface and the inner peripheral surface of the flange are connected in a stepped manner through the upper end surface of the side surface, and the inner peripheral surface of the side surface has an inclined portion that gradually inclines upward from the starting point of the inclination. have.

Further, a rice cooker according to the present disclosure includes the above-described inner pot, a main body having an open upper surface and housing the inner pot inside, and a lid body that opens and closes the opening of the upper surface of the main body. has an inner pot accommodating portion that accommodates the inner pot and a heating portion that heats the inner pot, and the inner pot accommodating portion is provided with an annular heat insulating rubber surrounding the outer peripheral surface of the side portion of the inner pot. It is.

The inner pot according to the present disclosure includes a side portion having an inwardly inclined portion, and a collar portion that protrudes outward from the outer peripheral surface of the side portion and extends upward, and the side portion and the collar portion are continuous in a stepped manner. ing. Moreover, the side portion has an inclined portion that inclines upward and inward. Therefore, boiling over can be suppressed without impairing the heat retention and heat storage properties of the inner pot. Further, in the rice cooker according to the present disclosure, an annular heat-insulating rubber is provided in the inner pot accommodating portion in which the inner pot is accommodated. Therefore, the rice cooker according to the present disclosure can suppress boiling over without impairing the heat retention and heat storage properties of the inner pot.

BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view which shows the external appearance of the rice cooker which concerns on embodiment. It is explanatory drawing which shows the state which opened|released the lid body of the rice cooker which concerns on embodiment. It is explanatory drawing which shows the internal structure of the rice cooker which concerns on embodiment. It is explanatory drawing which expanded the heat insulation rubber|gum of the rice cooker which concerns on embodiment, and its periphery. It is a cross-sectional schematic diagram which shows the inner pot of the rice cooker which concerns on embodiment. It is the cross-sectional schematic diagram to which the side part and collar part of the inner pot which concern on embodiment were expanded. It is the cross-sectional schematic diagram which expanded the upper part and collar part of the side part of the inner pot which concerns on embodiment.

Hereinafter, embodiments of an inner pot and a rice cooker according to the present disclosure will be described with reference to the attached drawings. In addition, the form of drawing is an example and does not limit this disclosure. In addition, the same reference numerals in each drawing are the same or equivalent, and this is common throughout the specification. In the following description, overlapping items are simplified or omitted as appropriate. The present disclosure is not limited by the embodiments described below, and can include all combinations and modifications of the configurations disclosed by the following embodiments. Also, the position, shape and size of each component in the attached drawings may differ from the actual ones. Furthermore, in the cross-sectional views of the attached drawings, hatching is appropriately omitted in view of visibility.

Embodiment.
First, with reference to FIGS. 1 and 2, the external configuration of rice cooker 100 according to the present embodiment will be described. FIG. 1 is a perspective view showing the appearance of a rice cooker 100 according to an embodiment. FIG. 2 is an explanatory diagram showing a state in which the lid body 20 of the rice cooker 100 according to the embodiment is opened.

As shown in FIG. 1, a rice cooker 100 according to the present embodiment includes a main body 9 having a bottomed tubular appearance, and a lid 20 attached to the main body 9 for opening and closing an upper opening of the main body 9. . The lid 20 is opened and closed by a latch (not shown) and the latch release button 16 .

An operation panel 21 is provided on the upper surface of the lid 20 . The operation panel 21 is provided, for example, in response to each operation of various instructions from the user, and is composed of buttons or the like for receiving these operations. The rice cooker 100 operates according to the user's operation on the operation panel 21 . Although the operation panel 21 is provided on the upper surface of the lid 20 in FIG.

As shown in FIG. 2, the lid 20 is biased against the main body 9 by the hinge portion in the opening direction to open the upper opening. As shown in FIG. 2, inside the main body 9, an inner hook 40 is accommodated. The inner hook 40 is accommodated so that the flange portion 43 protrudes upward from the upper opening of the main body 9 . The upper opening of the accommodated inner pot 40 is opened or closed by the lid 20 .

Next, referring to FIG. 3, the internal structure of rice cooker 100 according to the present embodiment will be described. FIG. 3 is an explanatory diagram showing the internal structure of the rice cooker 100 according to the embodiment. In the following description, as a general rule, each direction is defined on the basis that the rice cooker 100 and the inner pot 40 are placed on a horizontal plane.

As shown in FIG. 3 , the rice cooker 100 has an inner pot accommodating portion 10 that accommodates an inner pot 40 inside the main body 9 . The inner pot accommodating portion 10 is formed in a bottomed cylindrical shape having an open top surface and a bottom portion 10b. As an example, the inner hook accommodating portion 10 is formed in the air by a wall-shaped member. The inner pot accommodating portion 10 detachably accommodates a cylindrical inner pot 40 with a bottom that accommodates objects to be heated such as water and rice. The inner pot 40 has a bottom portion 41 , a side portion 42 extending upward from the bottom portion 41 , and a collar portion 43 provided above the side portion 42 . As shown in FIG. 3 , the inner hook 40 has a bottom surface portion 41 and a lower side portion 42 of the inner hook 40 facing the bottom portion 10 b of the inner hook accommodating portion 10 , and a lower surface of the collar portion 43 facing the inner hook accommodating portion 10 . is accommodated in the inner hook accommodating portion 10 so as to be placed on the upper edge of the .

A heating coil 11 is provided on the outer peripheral surface of the bottom portion 10 b of the inner pot accommodating portion 10 . The heating coil 11 is an annular member that is spirally turned, and is arranged on the bottom portion 41 and the side portion 42 of the inner pot 40 accommodated in the inner pot accommodating portion 10 with the bottom portion 10b of the inner pot accommodating portion 10 interposed therebetween. It is arranged opposite to the lower part. Specifically, the heating coils 11 include a bottom portion heating coil 11a arranged on the center side of the bottom portion 10b of the inner pot accommodating portion 10, a bottom portion outer peripheral heating coil 11b arranged on the outer peripheral side of the bottom portion 10b, and the bottom portion 10b. and an inclined portion heating coil 11c arranged at a corner portion of the outer periphery of the . The inner pot housing portion 10 functions as a coil base that holds the heating coil 11 . A magnetic flux is generated around the heating coil 11 by supplying the high-frequency current to the heating coil 11 . An eddy current is generated in the inner pot 40 that interlinks with this magnetic flux, and Joule heat generated by the eddy current raises the temperature of the inner pot 40 . The heating coil 11 is an example of a heating section for heating the inner pot 40 .

As shown in FIG. 3, a heat insulating rubber 12 is annularly provided on the inner peripheral surface 10a of the inner hook accommodating portion 10. As shown in FIG. The heat-insulating rubber 12 is provided at a position facing the outer peripheral surface 42 e of the side portion 42 of the inner pot 40 accommodated in the inner pot accommodating portion 10 . More specifically, the heat-insulating rubber 12 is provided within a height range of an inclined portion 42b of a side portion 42 of the inner pot 40 accommodated in the inner pot accommodating portion 10, which will be described later. Alternatively, the heat insulating rubber 12 may be provided so as to be positioned above the water level scale 45 provided on the inner pot 40 when the inner pot 40 is housed in the inner pot housing portion 10 . Since the water level scale 45 of the inner pot 40 will be described later, the description thereof is omitted here.

The heat insulating rubber 12 will be described with reference to FIG. FIG. 4 is an explanatory diagram enlarging the heat insulating rubber 12 and its surroundings of the rice cooker 100 according to the embodiment. The heat-insulating rubber 12 protrudes inward from the inner peripheral surface 10 a of the inner hook accommodating portion 10 so as to contact the outer peripheral surface 42 e of the side portion 42 of the inner hook accommodating portion 10 . The heat insulating rubber 12 is annularly provided along the inner peripheral surface 10a of the inner hook accommodating portion 10 at the same height position. Therefore, when the inner hook 40 is accommodated in the inner hook accommodating portion 10 , the outer peripheral surface 42 e of the side portion 42 of the inner hook 40 is surrounded by the heat insulating rubber 12 .

As shown in FIG. 4 , when the inner pot 40 is accommodated in the inner pot accommodating portion 10 , the heat insulating rubber 12 is provided within the height range of the inclined portion 42 b of the side portion 42 of the inner pot 40 . More specifically, when the inner hook 40 is accommodated in the inner hook accommodating portion 10, the heat insulating rubber 12 is positioned above and above the inclined portion SP of the inclined portion 42b of the side portion 42 of the inner hook 40 in the vertical direction. It is positioned below the midpoint of 42b. Since the inclined portion 42b of the side portion 42 of the inner hook 40 and the inclined portion SP will be described later, the description thereof is omitted here. 3 and 4, the position where the heat insulating rubber 12 is provided is not limited to that shown in FIGS. It may be provided so as to be located below and above the water level scale 45 .

Next, the inner hook 40 according to this embodiment will be described with reference to FIGS. 5 to 7. FIG. FIG. 5 is a schematic cross-sectional view showing inner pot 40 of rice cooker 100 according to the embodiment. The cross section of the inner pot 40 shown in FIG. FIG. 6 is an enlarged schematic cross-sectional view of the side surface portion 42 and the collar portion 43 of the inner pot 40 according to the embodiment. FIG. 7 is an enlarged cross-sectional schematic diagram of the upper portion of the side portion 42 and the collar portion 43 of the inner pot 40 according to the embodiment. In FIGS. 6 and 7, hatching indicating a cross section is omitted in order to avoid complication of the drawings.

The inner pot 40 is made of, for example, carbon, aluminum, iron, or a clad material of stainless steel and aluminum. The inner pot 40 has a cylindrical shape with a bottom, and the inner pot 40 accommodates rice and water, which are objects to be heated. The inner pot 40 contains magnetic metal that generates heat by electromagnetic induction. The inner pot 40 is housed in the inner pot housing portion 10 and is heated by electromagnetic induction of the heating coil 11 provided on the outer peripheral surface of the bottom portion 10b of the inner pot housing portion 10 . By heating the inner pot 40, the object to be heated housed inside the inner pot 40 is cooked.

The shape of the inner hook 40 is rotationally symmetrical about a central axis (not shown). Note that the shape of the inner hook 40 may not be completely rotationally symmetrical. Moreover, the inner pot 40 may have a biased shape. For example, the outline of the vertical projection of the inner hook 40 shown in FIG. 5 may be circular or elliptical.

As shown in FIG. 5, the inner pot 40 according to the present embodiment includes a bottom portion 41 and a cylindrical side portion 42 extending upward from the bottom portion 41 . In addition, the inner hook 40 includes a flange portion 43 that protrudes outward from an outer peripheral surface 42 e on the upper end side of the side portion 42 . The collar portion 43 protrudes from the outer peripheral surface 42e of the side surface portion 42 and extends upward. The inner peripheral surface 42 a of the side portion 42 and the inner peripheral surface 43 a of the flange portion 43 are continuous in a stepped manner via the upper end surface 42 c of the side portion 42 .

As shown in FIG. 5, the outer peripheral surface of the bottom surface portion 41 is substantially flat, while the inner peripheral surface 41a of the bottom surface portion 41 has a curved shape that is partially recessed outward. Therefore, the thickness of the bottom portion 41 is not constant. The thickness of the bottom portion 41 at the portion where the inner peripheral surface 41a is recessed toward the outside is thinner than the thickness at the portion where the inner peripheral surface 41a of the bottom portion 41 is flat. In addition, the inner peripheral surface 41a of the bottom surface portion 41 does not need to have a curved surface shape, and the inner peripheral surface 41a of the bottom surface portion 41 may be flat.

A cylindrical side surface portion 42 extends upward from a bottom surface portion 41 of the inner pot 40 . A boundary between the bottom surface portion 41 and the side surface portion 42 has a curved shape. The side portion 42 has an outer peripheral surface 42e, an inner peripheral surface 42a, and an upper end surface 42c. An outer peripheral surface 42 e of the side surface portion 42 extends from the bottom surface portion 41 substantially parallel to the vertical direction. An inner peripheral surface 42a of the side surface portion 42 has an inclined portion 42b whose upper portion is inclined inward. The upper end surface 42 c extends from the inclined portion 42 b toward the inner peripheral surface 43 a of the collar portion 43 . In FIG. 5, the corner at the boundary between the inclined portion 42b and the upper end surface 42c is chamfered into a curved shape, but the corner at the boundary between the inclined portion 42b and the upper end surface 42c may be chamfered in a plane. , this corner may not be chamfered.

As shown in FIGS. 5 and 6, the inclined portion 42b gradually inclines toward the inner side of the inner hook 40 starting from the inclination starting point SP. The inclined portion 42b is preferably inclined inward within a range of 5 degrees or more and 10 degrees or less with respect to the vertical direction. Therefore, as shown in FIG. 6, if an angle θ is an angle at which the inclined portion 42b is inclined inward from the inclination starting point SP with respect to the vertical direction, the angle θ is preferably 5 degrees or more and 10 degrees or less. .

As shown in FIG. 5, a water level scale 45 is provided on the inner peripheral surface 42a of the side portion 42 of the inner pot 40. As shown in FIG. The water level scale 45 is printed on the inner peripheral surface 42 a of the side portion 42 of the inner pot 40 . The water level scale 45 indicates the amount of rice to be heated and the amount of water. displayed at the height of The inclination starting point SP of the side portion 42 of the inner pot 40 is provided so as to be positioned above the water level scale 45 . In FIG. 5, the slope starting point SP is provided above the height of the scale of 5.5 go, which is the maximum amount of rice to be cooked.

Moreover, as shown in FIG. 5, the thickness of the inner pot 40 is the thickest at the portion where the inclined portion 42b of the side surface portion 42 and the flange portion 43 overlap. In other words, the thickness of the inner pot 40 at the angle formed by the inner peripheral surface 42 a of the side portion 42 and the upper end surface 42 c of the side portion 42 is thicker than the thickness of the inner pot 40 at the side portion 42 . FIG. 7 shows the angle β formed by the inner peripheral surface 42a of the side portion 42 and the upper end surface 42c of the side portion 42. As shown in FIG. The angle β formed between the inner peripheral surface 42a of the side surface portion 42 and the upper end surface 42c is 90 degrees or more. Also, the angle β is preferably 120 degrees or less. Hereinafter, the vertex of the angle formed by the inner peripheral surface 42a of the side surface portion 42 and the upper end surface 42c of the side surface portion 42 is referred to as the innermost position 42P. A dimension 42L shown in FIG. 5 is a dimension connecting the facing innermost positions 42P. The dimension 42L is the smallest among the dimensions connecting the inner peripheral surfaces of the inner hook facing each other. Therefore, at the innermost position 42P, the thickness of the inner hook 40 is the thickest and the inner circumference dimension 42L is the smallest.

As shown in FIG. 5, the upper end surface 42c of the side portion 42 connects the inclined portion 42b of the side portion 42 and the inner peripheral surface 43a of the flange portion 43 in a stepped manner. The upper end surface 42 c slopes upward toward the outside, ie, the collar portion 43 . The upper end surface 42c is preferably inclined inward at an angle of 25 degrees or more with respect to the horizontal plane. Moreover, the angle at which the upper end surface 42c is inclined upward is preferably 40 degrees or less. Therefore, as shown in FIG. 7, when the angle at which the upper end face 42c is inclined with respect to the horizontal plane is an angle α, the angle α is preferably 25 degrees or more and 40 degrees or less. For example, the angle α is 27 degrees. In addition, the upper end surface 42c of the side surface portion 42 does not have to be inclined upward toward the outside. The upper end surface 42 c of the side surface portion 42 may have a shape extending horizontally toward the flange portion 43 .

Next, the flange portion 43 will be described with reference to FIGS. 5 to 7. FIG. The collar portion 43 protrudes from the outer peripheral surface 42 e of the side portion 42 and extends upward to form the upper end portion of the inner hook 40 . The collar portion 43 has a lower end surface 43d that horizontally protrudes from the outer peripheral surface 42e of the side surface portion 42 . As shown in FIG. 7, the lower end surface 43d of the flange portion 43 is positioned below the angle formed by the inner peripheral surface 42a of the side surface portion 42 and the upper end surface 42c of the side surface portion 42. As shown in FIG. A lower end surface 43 d of the flange portion 43 functions as a mounting surface that is placed on the upper edge of the inner pot housing portion 10 when the rice cooker 100 is housed in the inner pot housing portion 10 .

Moreover, the height 43H between the upper end surface 42c of the side portion 42 and the upper end surface 43c of the flange portion 43 is preferably 1/10 or less of the height 40H of the entire inner pot. Here, when the upper end surface 42c of the side surface portion 42 is inclined, the height 43H between the upper end surface 42c of the side surface portion 42 and the upper end surface 43c of the flange portion 43, as shown in FIG. It refers to the distance between the innermost position 42P and the upper end surface 43c of the collar portion 43 in the direction.

As shown in FIG. 5, the inner peripheral surface 43a of the collar portion 43 has a curved concave portion 43b concave outward. A portion where the dented portion 43b is dented toward the outermost side is referred to as an outermost position 43P. A dimension 43L shown in FIG. 5 is a dimension connecting the opposing outermost positions 43P. Among the dimensions connecting the inner peripheral surfaces of the inner hook 40 facing each other, the dimension 43L is the largest. The outermost position 43</b>P is located outside the outer peripheral surface 42 e of the side surface portion 42 .

<Effects of this embodiment>
As described above, in the present embodiment, inner pot 40 of rice cooker 100 includes bottom surface portion 41, cylindrical side surface portion 42 extending upward from bottom surface portion 41, and outer peripheral surface 42e of side surface portion 42. a flange portion 43 that protrudes outward and extends upward; The inner peripheral surface 42a of the side surface portion 42 has an inclined portion 42b that gradually inclines upward from the inclination starting point SP.

With this configuration, the slime generated at the time of boiling first rises along the inwardly sloping portion 42b, so that the rising momentum is weakened. Therefore, it is possible to suppress boiling over due to lameness. Further, the slime that has ascended the inclined portion 42b climbs over the upper end surface 42c of the side surface portion 42 and a stepped portion formed at the boundary between the upper end surface 42c and the inner peripheral surface 43a of the flange portion 43, and further reaches the flange portion. 43 will rise. For this reason, the momentum of the rising pot is further weakened, and it is possible to suppress the boiling over. Further, the side surface portion 42 of the inner hook 40 has an inclined portion 42b in which the inner peripheral surface 42a is inclined inward, so that the thickness of the side surface portion 42 is increased. Therefore, the heat retaining property and the heat storage property of the portion below the flange portion 43 are enhanced. Note that sticky liquid is a liquid containing starch eluted from rice, which is generated when rice, which is an object to be heated, is cooked. In addition, boiling over includes a state in which the lid body 20 of the rice cooker 100 is covered with sticky liquid.

In addition, in the inner pot 40 according to the present embodiment, the angle θ at which the inclined portion 42b is inclined inward from the inclination starting point SP with respect to the vertical direction is 5 degrees or more and 10 degrees or less. For this reason, the inclined portion 42b can weaken the upward force of the pot without making the dimension of the inner peripheral surface of the inner pot 40 too narrow.

Further, the inner pot 40 according to the present embodiment has an inner pot at the angle formed by the inner peripheral surface 42a of the side surface portion 42 and the upper end surface 42c of the side surface portion 42 in a cross section along the vertical direction orthogonal to the bottom surface portion 41. The thickness of 40 is thicker than the thickness of the inner pot at the side portion 42 . Therefore, the strength of the angle formed by the inner peripheral surface 42a of the side portion 42 and the upper end surface 42c of the side portion 42 is ensured, the load can be endured even when stress is concentrated, and damage to the inner pot 40 can be suppressed. .

Further, in the inner pot 40 according to the present embodiment, the height 43H between the upper end surface 42c of the side portion 42 and the upper end surface 43c of the flange portion 43 is 1/10 or less of the height 40H of the entire inner pot. be. The collar portion 43 forms the upper end portion of the inner pot 40 . Here, when the inner pot 40 is housed in the inner pot housing portion 10 of the rice cooker 100 , the collar portion 43 is positioned above the inner pot housing portion 10 . Therefore, the space at the upper end of the inner pot 40 formed inside the collar portion 43 above the inner pot accommodating portion 10 is easily cooled. Since air bubbles in the sticky matter are easily destroyed in a low-temperature space, the air bubbles in the sticky matter are destroyed at the upper end portion of the inner pot 40, and boiling over can be suppressed. However, when the ratio of the height 43H of the collar portion 43 to the height 40H of the inner pot 40 increases, the temperature of the entire inner pot 40 tends to decrease. In the present embodiment, the height 43H of the collar portion 43 is set to 1/10 or less of the height 40H of the entire inner pot, thereby impairing the heat retention and heat storage properties of the inner pot 40 below the collar portion 43. However, it maintains the cooling performance of the flange 43 for destroying the air bubbles in the baby.

In addition, in the inner pot 40 according to the present embodiment, the side portion 42 is provided with a water level scale 45 indicating the water level on the inner peripheral surface 42 a , and the inclination starting point SP of the side portion 42 is located above the top of the water level scale 45 . located above. Since slime is generated on the liquid surface of the object to be heated, it is not generated above the top of the water level scale 45 . Therefore, the slime is generated below the slope starting point SP and rises from the slope starting point SP along the entire slope 42b. Therefore, it is possible to make the most of the effect of the inclined portion 42b that suppresses the upward force of the belly.

In addition, in the inner hook 40 according to the present embodiment, the inner peripheral surface 43a of the collar portion 43 has a curved recessed portion 43b that is recessed outward, connecting the opposing inner peripheral surfaces of the inner hook 40. In terms of dimensions, the dimension 43L connecting the opposing inner peripheral surfaces of the recessed portion 43b toward the outermost side is the largest. Since the collar part 43 forms the upper end of the inner pot 40 , the cooling effect at the upper end of the inner pot 40 is enhanced by widening the space of the upper end of the inner pot 40 . For this reason, the bubbles in the crumbs are easily destroyed, and the spillover can be further suppressed.

Further, in the inner pot 40 according to the present embodiment, the angle formed by the inclined portion 42b of the side portion 42 and the upper end surface 42c of the side portion 42 is equal to the lower end surface of the collar portion 43 protruding from the outer peripheral surface 42e of the side portion 42. It is located above 43d. When the inner pot 40 is accommodated in the rice cooker 100 , the lower end surface 43 d of the collar portion 43 is placed on the inner pot accommodating portion 10 . In other words, since the innermost position 42P of the inner hook 40 is located above the lower end surface 43d, it is difficult for the inner hook accommodating portion 10 to keep warm. For this reason, the air bubbles in the cocoon are likely to be destroyed when cooled above the innermost position 42P. On the other hand, since the thickness of the innermost position 42P is thick, it is difficult to dissipate heat. Therefore, it is possible to prevent the temperature of the side surface portion 42 below the innermost position 42P of the inner pot 40 from dropping. In other words, the innermost position 42P exists in the portion connecting the side surface portion 42 and the flange portion 43, and the innermost position 42P is positioned above the lower end surface 43d of the flange portion 43, thereby increasing the heat retention and heat retention of the side surface portion 42. Heat dissipation at the flange portion 43 is promoted without impairing the heat storage property, and boiling over is suppressed.

Further, in the inner pot 40 according to the present embodiment, the upper end surface 42c of the side portion 42 is inclined upward toward the outside, and the angle α at which the upper end surface 42c of the side portion 42 is inclined with respect to the horizontal plane is 25. degree or more. Therefore, the condensed water generated at the collar portion 43 of the inner pot 40 does not remain on the upper end surface 42c of the side surface portion 42 and falls. Therefore, it is possible to suppress the temperature of the inner pot 40 from being affected by condensation. In addition, since the condensed water does not remain on the upper end surface 42c of the side part 42 after the completion of rice cooking, stickiness of the rice caused by the condensed water dropping from the upper end surface 42c onto the rice to be heated can be suppressed after the completion of rice cooking.

Further, in the inner hook 40 according to the present embodiment, the angle β formed by the inner peripheral surface 42a of the side portion 42 and the upper end surface 42c of the side portion 42 is 90 degrees or more. Therefore, the strength at the innermost position 42P is improved, and the durability of the inner hook 40 is enhanced.

In addition, the rice cooker 100 according to the present embodiment includes the above-described inner pot 40, the main body 9 having the upper surface opened and housing the inner pot 40 therein, and the upper surface opening of the main body 9 that is openable and closable. The main body 9 has an inner pot accommodating portion 10 that accommodates the inner pot 40 and a heating portion that heats the inner pot 40. The inner pot accommodating portion 10 includes a side surface of the inner pot 40. An annular heat-insulating rubber 12 is provided to surround the outer peripheral surface 42e of the portion 42, and the heat-insulating rubber 12 is provided within a height range of the inclined portion 42b when the inner hook 40 is accommodated in the inner hook accommodating portion 10. ing. Therefore, when the inner pot 40 is accommodated in the inner pot accommodating portion 10 , a portion of the inclined portion 42 b and the collar portion 43 are positioned above the heat insulating rubber 12 . The temperature of the collar portion 43 is likely to drop, and the temperature of a part of the inclined portion 42b located above the heat insulating rubber 12 is affected by the temperature drop of the collar portion 43 and drops. For this reason, at a portion of the inclined portion 42b and the flange portion 43 located above the heat insulating rubber 12, the gas bubbles are easily destroyed. On the other hand, the side surface portion 42 located below the heat insulating rubber 12 is less susceptible to temperature changes above the heat insulating rubber 12, thereby improving heat retention and heat storage.

In addition, in the rice cooker 100 according to the present embodiment, the heat insulating rubber 12 is positioned below the vertical midpoint of the inclined portion 42b when the inner pot 40 is accommodated in the inner pot accommodating portion 10 . Therefore, the temperature of the portion above the midpoint of the inclined portion 42b is lower than the temperature of the portion below the midpoint of the inclined portion 42b. Therefore, when the pottery rises above the middle point of the inclined portion 42b, the bubbles of the pottery are likely to be destroyed.

In addition, in the rice cooker 100 according to the present embodiment, the heat insulating rubber 12 is positioned above the water level scale 45 when the inner pot 40 is housed in the inner pot housing portion 10 . Since the object to be heated is not stored above the water level scale 45, the heat insulating rubber 12 prevents the temperature difference from occurring in the object to be heated.

9 main body 10 inner pot housing portion 10a inner peripheral surface 10b bottom portion 11 heating coil 11a bottom portion heating coil 11b bottom portion outer peripheral heating coil 11c inclined portion heating coil 12 heat insulating rubber 16 latch release button 20 Lid body 21 Operation panel 40 Inner pot 40H Height 41 Bottom part 41a Inner peripheral surface 42 Side part 42a Inner peripheral surface 42b Inclined part 42c Upper end surface 42e Outer peripheral surface 42L Dimensions 42P Maximum Inner position 43 collar portion 43a inner peripheral surface 43b recessed portion 43c upper end surface 43d lower end surface 43H height 43L dimension 43P outermost position 45 water level scale 100 rice cooker SP inclination starting point θ angle, alpha angle, beta angle.

Claims (12)

a bottom portion;
a cylindrical side portion extending upward from the bottom portion;
a collar portion that protrudes outward from the outer peripheral surface of the side portion and extends upward,
the inner peripheral surface of the side surface portion and the inner peripheral surface of the flange portion are continuous in a stepped shape via the upper end surface of the side surface portion;
The inner peripheral surface of the side surface portion has an inclined portion that gradually inclines upward from the inclination starting point,
Inner pot. The angle θ at which the inclined portion inclines inward from the inclination starting point with respect to the vertical direction is 5 degrees or more and 10 degrees or less.
The inner pot according to claim 1. In a cross section along the vertical direction perpendicular to the bottom portion, the thickness of the inner pot at the angle formed by the inner peripheral surface of the side portion and the upper end surface of the side portion is greater than the thickness of the inner pot at the side portion. too thick,
The inner pot according to claim 1 or 2. The height between the upper end surface of the side surface portion and the upper end surface of the collar portion is 1/10 or less of the height of the entire inner pot.
The inner pot according to any one of claims 1 to 3. The side surface portion has a water level scale indicating the water level on the inner peripheral surface,
The inclination starting portion of the side portion is located above the top of the water level scale,
The inner pot according to any one of claims 1 to 4. The inner peripheral surface of the collar portion has a curved dented portion that dents outward,
In the dimension connecting the facing inner peripheral surfaces of the inner hook, the dimension connecting the facing inner peripheral surfaces of the portion recessed toward the outermost side of the recessed portion is the largest,
The inner pot according to any one of claims 1 to 5. The angle formed by the inclined portion of the side portion and the upper end surface of the side portion is
located above the lower end surface of the flange projecting from the outer peripheral surface of the side surface,
The inner pot according to any one of claims 1 to 6. The upper end surface of the side surface portion is inclined upward toward the outside,
The angle α at which the upper end surface of the side surface is inclined with respect to the horizontal plane is 25 degrees or more.
The inner pot according to any one of claims 1 to 7. An angle β formed by the inner peripheral surface of the side portion and the upper end surface of the side portion is 90 degrees or more.
The inner pot according to any one of claims 1 to 8. The inner pot according to any one of claims 1 to 9,
a main body having an open upper surface and housing the inner pot therein;
a lid body for openable and closable covering the opening of the upper surface of the main body,
The body is
an inner pot accommodating portion that accommodates the inner pot;
and a heating unit that heats the inner pot,
The inner pot accommodating portion is provided with an annular heat-insulating rubber surrounding the outer peripheral surface of the side portion of the inner pot,
The heat insulating rubber is provided within a height range of the inclined portion when the inner pot is accommodated in the inner pot accommodating portion.
rice cooker. The heat insulating rubber is positioned below a midpoint in the vertical direction of the inclined portion when the inner pot is housed in the inner pot housing portion.
The rice cooker according to claim 10. Claim 5 or the inner pot according to any one of Claims 6 to 9 depending on Claim 5;
a main body having an open upper surface and housing the inner pot therein;
a lid body for openable and closable covering the opening of the upper surface of the main body,
The body is
an inner pot accommodating portion that accommodates the inner pot;
and a heating unit that heats the inner pot,
The inner pot accommodating portion is provided with an annular heat-insulating rubber surrounding the outer peripheral surface of the side portion of the inner pot,
The heat insulating rubber is positioned above the water level scale when the inner pot is housed in the inner pot housing portion.
rice cooker.

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