JP2023101123A - rice cooker - Google Patents

Abstract

To provide a rice cooker for improving thermal insulation performance of a lid body.SOLUTION: A rice cooker includes: a main body having an inner pot storage part with an open top; an inner pot to be removably mounted on the inner pot storage part; and a lid body rotatably attached to the main body so as to openably cover an opening of the inner pot storage part. The lid body includes: an upper lid for forming an outer surface of the lid body; a lower lid arranged nearer to a side of the main body than the upper lid; and a thermal insulation material. The thermal insulation material includes: a thermal insulation plane part arranged to cover a plane part of the lower lid positioned above the opening of the inner pot storage part while the lid body is closed; and thermal insulation side surface parts arranged to cover a side surface part of the lower lid.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present disclosure relates to a rice cooker, and more particularly to a heat insulation structure of a lid.

Conventionally, there has been proposed a rice cooker having a heat-insulating structure inside the lid (see, for example, Patent Document 1). In Patent Document 1, by providing a heat insulating material inside the lid, the heat of the inner pot can be suppressed from escaping from the lid to the outside, so that boiling occurs quickly and the temperature in the inner pot is uniform. You can cook good rice.

JP 2011-189034 A

However, in Patent Document 1, the heat insulating material is provided only so as to cover the upper part of the heater provided on the upper part of the heat sink located on the lower surface of the lid, and the heat of the inner pot is transferred from the side of the lid. There was a problem of escaping to the outside.

The present disclosure has been made to solve the problems described above, and aims to provide a rice cooker in which the heat insulation performance of the lid is improved.

A rice cooker according to the present disclosure includes a main body having an inner pot housing portion with an open upper surface, an inner pot detachably attached to the inner pot housing portion, and a rotatable inner pot attached to the main body portion. a lid body that openably and closably covers the opening of the inner pot housing portion, the lid body comprising an upper lid that forms an outer surface of the lid body; a lower lid that is arranged closer to the main body than the upper lid; a heat insulating material, the heat insulating flat portion disposed so as to cover the flat portion of the lower lid positioned above the opening of the inner pot housing portion when the lid body is closed. and a heat-insulating side portion arranged to cover the side portion of the lower lid.

According to the rice cooker according to the present disclosure, the heat insulating material is provided so as to cover the side surface of the lid in addition to the flat surface of the lid. It is possible to suppress the heat insulation performance of the lid body.

It is the longitudinal cross-sectional view which looked at the front view of the internal structure in the state which closed the cover body of the rice cooker which concerns on embodiment. It is the longitudinal cross-sectional view which looked at the internal structure in the state which closed the cover body of the rice cooker which concerns on embodiment from the side. It is the disassembled perspective view which looked at the upper cover of the cover body of the rice cooker which concerns on embodiment from upper direction. It is a top view of the lower cover of the cover body of the rice cooker which concerns on embodiment. Fig. 2 is a perspective view showing a heat insulating material provided on the lid of the rice cooker according to the embodiment; 6 is a perspective view showing a state before part of the heat insulating material shown in FIG. 5 is bent; FIG. It is the perspective view which looked at the heat insulating material arrange|positioned in the upper lid and upper lid of the rice cooker which concerns on embodiment from the downward direction. It is the perspective view which looked at the upper inner cover of the rice cooker which concerns on embodiment from upper direction. It is the longitudinal section which expanded the principal part of the internal structure of the top lid of the rice cooker concerning an embodiment. It is the perspective view which looked at the lower cover of the rice cooker which concerns on embodiment from upper direction. It is the perspective view which looked at the state to which the heat insulating material was attached to the lower cover of the rice cooker which concerns on embodiment from upper direction. It is the longitudinal cross-sectional view which viewed the internal structure of the cover body of the rice cooker which concerns on embodiment from the front. FIG. 13 is a longitudinal sectional view enlarging a main part of the internal structure of the lid shown in FIG. 12;

A rice cooker 100 according to an embodiment will be described below with reference to the drawings. It should be noted that the present disclosure is not limited by the embodiments described below. In addition, in the following drawings, the size relationship of each component may differ from the actual size. Also, in the following description, terms representing directions (for example, "up", "down", "right", "left", "front", "back", etc.) are used as appropriate for ease of understanding. For the purpose of description, these terms are not intended to limit this disclosure. Unless otherwise specified, these directional terms mean directions when the rice cooker 100 is viewed from the front. Also, in each figure, the same reference numerals denote the same or corresponding parts, which are common throughout the specification.

Embodiment.
FIG. 1 is a front view of the internal structure of rice cooker 100 according to the embodiment with lid 2 closed. FIG. 2 is a side view of the internal structure of the rice cooker 100 according to the embodiment with the lid 2 closed. FIG. 3 is an exploded perspective view of the upper lid 30 of the lid 2 of the rice cooker 100 according to the embodiment, viewed from above. FIG. 4 is a plan view of lower lid 40 of lid 2 of rice cooker 100 according to the embodiment.

A rice cooker 100 according to the embodiment is a domestic rice cooker that heats and cooks an object to be heated (for example, rice and water). As shown in FIGS. 1 and 2, the rice cooker 100 includes a main body 1 having an inner pot housing portion 10 with an open upper surface, an inner pot 5 detachably attached to the inner pot housing portion 10, A lid body 2 is rotatably connected to the body part 1 by a hinge mechanism part 11 and covers the opening of the inner hook housing part 10 so as to be openable and closable.

The body portion 1 has a bottomed tubular appearance, an inner pot storage portion 10 in which the inner pot 5 is detachably mounted, a heating coil 13 for induction-heating the inner pot 5, and a temperature control unit for controlling the temperature of the inner pot 5. It has a pot bottom temperature sensor 14 for detecting and a body heater 15 for heating the body of the inner pot 5. - 特許庁The main unit 1 executes the rice cooking process by driving and controlling each unit and each device by a built-in control unit (not shown).

A lid open/close button 12 for opening and closing the lid 2 is provided on the front side of the main body 1. When the user presses the lid open/close button 12, the closed state of the lid 2 is released and the main body is opened. Part 1 can be opened.

The inner pot 5 has a bottomed cylindrical shape and is made of a carbon material that generates heat by induction heating. In addition, the inner pot 5 may be, for example, a container (a so-called earthenware pot) made of a non-metallic material such as ceramic or a cast metal container such as aluminum. Rice and water, which are objects to be heated, are accommodated inside the inner pot 5 . The inner hook 5 is provided with a flange portion 5a protruding outward along the opening edge over the entire circumference. This flange portion 5a protrudes from the main body portion 1 side toward the lid body 2 side in a state in which the inner pot 5 is attached to the inner pot housing portion 10 and the lid body 2 is closed. located above. Here, the lower surface of the lid body 2 is at the position of the dashed line X in FIG. Further, the flange portion 5a is surrounded by the side surface portion of the lid 2 when the lid 2 is closed with the inner pot 5 attached to the inner pot housing portion 10. As shown in FIG.

An operation unit 16 (see FIG. 3) operated by the user is provided on the front side of the upper surface of the lid 2 . The operation unit 16 has various operation keys (not shown) with functions such as rice cooking, keeping warm, and reservation. Further, as shown in FIGS. 1 and 2, a substrate chamber 8, which is an internal space of the lid 2, is formed below the upper surface of the lid 2. As shown in FIGS. An operation board 9 is accommodated in the board chamber 8 . The operation board 9 is equipped with switches (not shown) for inputting operation keys of the operation unit 16 . An operation board 9 housed in a board chamber 8 of the lid 2 is electrically connected to a controller built in the main body 1 via a flat cable (not shown).

In addition, the structure of the cover 2 is not limited to the above. For example, a display panel (not shown) for displaying operation results or operating conditions is provided on the front side of the lid 2, and a display window is provided on the upper surface of the lid 2 so that the display contents of the display panel within the lid 2 can be viewed. (not shown) may be provided. In this case, the display panel may be mounted on the operation board 9 and held on the upper surface side of the cover 2 in the board chamber 8 by a holding member made of heat-resistant resin. By providing the display panel near the operation unit 16 in this way, the user of the rice cooker 100 can operate the operation unit 16 while confirming the display contents of the display panel that can be seen through the display window.

Based on outputs from the bottom temperature sensor 14 and the operation unit 16, the control unit controls overall operations of the rice cooker 100, such as control of high-frequency current applied to the heating unit. The control unit can be configured with hardware such as a circuit device that realizes its functions, or can be configured with an arithmetic device such as a microcomputer or a CPU and software executed thereon. The control unit is mounted on the control board and fixed to the inner pot housing portion 10 .

The lid 2 covers the opening of the inner pot housing portion 10 so as to be openable and closable. The lid body 2 is detachably attached to the outer lid 3 constituting the upper portion of the lid body 2 and the outer lid 3. When the lid body 2 closes the opening of the inner kettle housing portion 10, the upper surface of the inner kettle 5 is closed. and an inner lid 4 that closes the opening of the. The inner lid 4 is attached to the lower portion of the outer lid 3 , which is the portion facing the inner hook 5 , via an inner lid locking portion 46 .

One end of the outer lid 3 of the lid 2 is connected to the upper portion of the main body 1 by a hinge mechanism 11 . The hinge mechanism section 11 has a hinge shaft 11a and a hinge spring 11b. The lid body 2 is biased in a direction to separate from the body portion 1 and open the opening of the body portion 1 by a hinge spring 11b. When the lid open/close button 12 is pressed in the closed state, the lid body 2 rotates around the hinge shaft 11a by the biasing force of the hinge spring 11b and leaves the main body 1. As shown in FIG. As a result, the opening of the body portion 1 is opened.

A lid heater plate 17 made of metal and a lid heater 18 attached to the upper surface of the lid heater plate 17 are provided as heating means between the outer lid 3 and the inner lid 4 . The lid heater 18 is energized and controlled by the controller, and particularly heats the object to be heated which is housed inside the inner pot 5 from above during heat retention. The lid heater plate 17 comes into contact with the inner lid 4 when the lid 2 is closed, and is released from contact with the inner lid 4 when the lid 2 is opened.

A heat insulating material 60 is provided inside the outer lid 3 , and the heat insulating material 60 is arranged above the lid heater 18 and below the operation board 9 . Also, the heat insulating material 60 is arranged at a position covering a part of the upper part of the steam discharge part 6 which will be described later.

As shown in FIGS. 3 and 4, the outer lid 3 includes an upper lid 30 forming the outer surface of the lid body 2 and a lower lid 40 arranged closer to the main body 1 than the upper lid 30 . The operating portion 16 provided on the upper surface of the lid body 2 is provided on the upper lid 30 . The upper lid 30 is composed of an upper outer lid 30a and an upper inner lid 30b arranged inside the upper outer lid 30a.

As shown in FIG. 1, the upper lid 30 has a concave shape with the main body 1 side recessed, and the lower lid 40 is arranged inside the recess. As shown in FIG. 3, the upper lid 30 is formed with a steam port 20 on the back side of the main body 1 for discharging steam generated in the inner pot 5 during rice cooking to the outside.

The lower lid 40 is formed with an opening 43 (see later-described FIG. 10) that communicates the steam port 20 with the inside of the inner pot 5 at the same position as the steam port 20 formed in the upper lid 30 . As shown in FIG. 2 , the opening 43 is fitted with a steam discharge portion 6 having a hollow structure that communicates between the steam port 20 and the interior of the inner pot 5 . Further, the lower lid 40 is provided with an inner lid engaging portion 46 for detachably attaching the inner lid 4 . Further, the lower lid 40 is connected to the main body portion 1 by the hinge mechanism portion 11 .

FIG. 5 is a perspective view showing heat insulating material 60 provided on lid 2 of rice cooker 100 according to the embodiment. FIG. 6 is a perspective view showing a state before part of the heat insulating material 60 shown in FIG. 5 is bent.

A heat insulating material 60 shown in FIGS. 5 and 6 is provided between the upper lid 30 and the lower lid 40 . The heat insulating material 60 includes a heat insulating flat portion 61 arranged to cover the flat portion of the lower lid 40 and a heat insulating flat portion 61 arranged to cover a side portion provided substantially perpendicular to the flat portion of the lower lid 40. and a side portion 62 . The heat insulating material 60 has a sheet shape and is designed to be folded. Therefore, the heat insulating side surface portion 62 is bent substantially vertically at the connection portion 63 with the heat insulating flat portion 61 , so that the heat insulating side portion 62 is formed in a shape arranged so as to cover the side portion of the lower lid 40 . The heat insulating material 60 is provided between the upper lid 30 and the lower lid 40 in a shape in which the heat insulating side portion 62 is bent. The heat insulating material 60 is not limited to a sheet shape, and may be a molded product such as expanded polystyrene in which the heat insulating side portion 62 is provided substantially perpendicularly to the heat insulating plane portion 61 without being bent.

Here, when the rice is cooked, the inner pot 5 generates heat and the heat is transferred to the inside of the inner pot 5. When the water boils inside the inner pot 5, convection occurs and the heat transfer is accelerated. Whether or not the heat is transferred to the entire rice as quickly as possible is the key to suppressing uneven cooking, and is related to the deliciousness of the rice. Since the momentum of boiling is controlled by the amount of overheating of the inner pot 5, it is important to prevent the heat of the inner pot 5 from escaping to the outside.

Furthermore, the inner pot 5 is heated by induction heating to cause boiling, but when the temperature in the vicinity of the lid body 2 drops and the temperature of the space above the water surface of the inner pot 5 drops, the boiling becomes weak. The heat insulation performance of the lid body 2 is important because it may spoil the taste of the rice.

Therefore, the heat insulating material 60 is arranged so as to cover not only the flat portion of the lower lid 40 but also the side portion of the lower lid 40 . By doing so, the heat of the inner pot 5 is prevented from escaping from above through the opening in the upper surface, and the heat of the inner pot 5 is prevented from escaping from the sides through the flange portion 5a. can be suppressed, the heat insulation performance can be improved.

Furthermore, when the heat insulating material 60 is to be provided up to the side surface of the lid 2, if the sheet-like heat insulating material 60 is bent in a substantially vertical direction at the connecting portion 63, the heat insulating side surfaces 62 overlap each other. Since the thickness increases, the storability of the heat insulating material 60 in the lid body 2 deteriorates. Therefore, a plurality of slits 64 are formed in the heat insulating side surface portion 62 of the heat insulating material 60 along the circumferential direction. By forming the plurality of slits 64 in the heat insulating side portion 62 in this way, it is possible to prevent the heat insulating side portions 62 from overlapping with each other and to secure the storability of the heat insulating material 60 in the lid body 2 .

The heat insulating plane portion 61 covering the main body portion 1 from above is arranged so that the lid heater 18 is positioned below it and the operation board 9 is positioned above it. In other words, the heat insulating plane portion 61 is arranged between the lid heater 18 and the operation board 9 in the vertical direction. Therefore, the heat of the lid heater 18 disposed below can be insulated by the heat insulating flat portion 61 , and the adverse effect of the heat of the lid heater 18 on the operation board 9 can be reduced. The heat insulating material 60 is made of a flame-retardant material such as melamine foam, felt, glass wool, etc., so as not to ignite due to the heat of the lid heater 18 and the operation board 9 arranged around it. It's becoming

FIG. 7 is a bottom perspective view of the top lid 30 of the rice cooker 100 according to the embodiment and the heat insulating material 60 arranged in the top lid 30 . FIG. 8 is a perspective view of the upper inner lid 30b of the rice cooker 100 according to the embodiment, viewed from above. FIG. 9 is a vertical cross-sectional view enlarging a main part of the internal structure of upper lid 30 of rice cooker 100 according to the embodiment.

As shown in FIGS. 7 and 9, a plurality of vertically extending ribs 31 are provided along the circumferential direction on the inner sides of the side surfaces of the upper and outer lids 30a in order to reinforce the lid body 2. As shown in FIGS. Further, as shown in FIG. 8, a plurality of slits 32 are formed along the circumferential direction in the side surface of the upper inner cover 30b. Each slit 32 is formed so as to match the position of the rib 31 . By aligning the positions of the slits 32 with the positions of the ribs 31 in this way, it is possible to suppress the formation of a gap between the upper outer cover 30a and the upper inner cover 30b. Similarly, each slit 64 is formed to match the position of the rib 31 . By aligning the positions of the slits 64 with the positions of the ribs 31 in this way, it is possible to suppress the formation of gaps between the heat insulating material 60 and the upper lid 30. storability can be ensured. Further, as shown in FIG. 7, the lower end of each rib 31 is provided with a claw portion 31a that partially protrudes downward. The claw portion 31a will be described later.

As shown in FIG. 8, the upper inner cover 30b is provided with a plurality of concave portions 33 along the circumferential direction in which part of the side surface portion is concaved inward. Then, as shown in FIG. 9, in a state in which the upper and outer lids 30a are fixed to the upper and inner lids 30b, the openings of the recesses 33 are covered with the side surfaces of the upper and outer lids 30a so that the recesses 33 and the upper and outer lids 30a and 30b are covered. An air layer 34 is formed between the side surface of the lid 30a. The air layer 34 is a closed space, and the air inside does not move and has a heat insulating effect. Note that the air layer 34 may not be completely sealed.

In the embodiment, an air layer is formed between each recess 33 and the side surface of the upper and outer lid 30a. It is sufficient that a plurality of air layers are formed in each case. For example, a plurality of recesses (not shown) recessed toward the inside are provided along the circumferential direction in a part of the side surface of the lower lid 40, and the opening of each recess of the lower lid 40 is in the heat insulating side surface portion 62 of the heat insulating material 60. An air layer (not shown) may be formed between each concave portion of the lower lid 40 and the heat insulating side portion 62 of the heat insulating material 60 by being covered. In addition, below, the recessed part 33 is also called a 1st recessed part.

Further, in order to improve the heat insulation performance of the flat portion of the lid 2 located above the opening of the inner pot 5 when the lid 2 is closed, an air layer is formed inside the flat portion of the lid 2. may be configured. For example, a recessed portion 44 (see FIG. 10, which will be described later) is provided by partially recessing the flat portion of the lower lid 40 toward the inside, and the recessed portion 44 is covered with the heat insulating flat portion 61 of the heat insulating material 60. A configuration in which an air layer is formed between the heat insulating material 60 and the heat insulating plane portion 61 may be adopted. In addition, below, the recessed part 44 is also called a 2nd recessed part.

FIG. 10 is a perspective view of the lower lid 40 of the rice cooker 100 according to the embodiment, viewed from above. FIG. 11 is a top perspective view of a state in which the heat insulating material 60 is attached to the lower lid 40 of the rice cooker 100 according to the embodiment. FIG. 12 is a vertical cross-sectional view of the internal structure of the lid 2 of the rice cooker 100 according to the embodiment viewed from the front. FIG. 13 is an enlarged vertical cross-sectional view of the main part of the internal structure of the lid 2 shown in FIG. 10 and 11 show a state in which the steam discharge part 6 is removed from the lower lid 40. As shown in FIG.

As shown in FIGS. 10 and 11 , a holding portion 41 for holding the heat insulating side portion 62 of the heat insulating material 60 is provided at the outer lower portion of the side portion of the lower lid 40 . The holding portion 41 protrudes upward and has a substantially L shape or a substantially inverted L shape when viewed from above. A plurality of holding portions 41 having a substantially L shape and a substantially inverted L shape are provided alternately along the circumferential direction. A heat insulating side surface portion 62 is inserted between the wall of the holding portion 41 and the side surface of the lower lid 40 . By providing the holding portion 41 in this way, the heat insulating material 60 can be attached to the lower lid 40, and the circumferential displacement of the heat insulating side portion 62 can be suppressed.

Further, as shown in FIGS. 10 and 11, a claw receiving portion 42 is provided in the outer lower portion of the side portion of the lower lid 40 along the circumferential direction. The claw receiving portion 42 protrudes upward and has a generally concave shape when viewed from above. Then, as shown in FIGS. 12 and 13 , the upper lid 30 is attached to the lower lid 40 by hooking and fitting the claw portions 31 a onto the claw receiving portions 42 . Since each claw portion 31a is hooked on the claw receiving portion 42, each claw portion 31a is used for positioning when the upper lid 30 is attached to the lower lid 40, and the upper lid 30 is opened with respect to the lower lid 40 to create a gap between them. can be suppressed.

As described above, the rice cooker 100 according to the embodiment includes the main body portion 1 having the inner pot housing portion 10 whose upper surface is open, the inner pot 5 detachably attached to the inner pot housing portion 10, and the main body portion 1. and a lid body 2 which is movably attached and which covers the opening of the inner hook housing part 10 so as to be openable and closable. Further, the lid body 2 has an upper lid 30 forming the outer surface of the lid body 2 , a lower lid 40 arranged closer to the main body 1 than the upper lid 30 , and a heat insulating material 60 . The heat insulating material 60 includes a heat insulating flat portion 61 arranged so as to cover the flat portion of the lower lid 40 positioned above the opening of the inner pot housing portion 10 when the lid body 2 is closed, and the lower lid 40 and a heat insulating side portion 62 arranged to cover the side portion of the .

According to the rice cooker 100 according to the embodiment, the heat insulating material 60 is provided so as to cover not only the flat surface of the lid 2 but also the side surface of the lid 2 . escaping to the outside from the side surface of the lid body 2 can be suppressed, and the heat insulation performance of the lid body 2 can be improved.

In addition, in the rice cooker 100 according to the embodiment, the lid 2 includes a lid heater 18 that heats the inner pot 5 from above, and an operation substrate housed in a substrate chamber 8 formed below the upper surface of the lid 2. 9 and . The heat insulating plane portion 61 is arranged above the lid heater 18 and below the operation board 9 .

According to the rice cooker 100 according to the embodiment, the heat insulating plane portion 61 is arranged between the lid heater 18 and the operation board 9 in the vertical direction. Therefore, the heat of the lid heater 18 disposed below can be insulated by the heat insulating flat portion 61 , and the adverse effect of the heat of the lid heater 18 on the operation board 9 can be reduced.

In addition, in the rice cooker 100 according to the embodiment, the opening 43 formed in the lower lid 40 is provided with the steam discharge portion 6 , and the heat insulating plane portion 61 is partially above the steam discharge portion 6 . is positioned to cover the

According to the rice cooker 100 according to the embodiment, the heat insulating plane portion 61 is arranged at a position covering part of the steam discharge portion 6 from above. By insulating part of the steam discharge portion 6 with the heat insulating flat portion 61 in this manner, dew condensation that occurs when the steam is cooled in the steam discharge portion 6 can be reduced.

Moreover, in the rice cooker 100 according to the embodiment, the heat insulating side portion 62 is formed with a plurality of slits 64 .

According to the rice cooker 100 according to the embodiment, since the plurality of slits 64 are formed in the heat-insulating side portion 62, the heat-insulating side portions 62 are prevented from overlapping each other, and the heat insulating material 60 can be easily stored in the lid body 2. can be ensured.

Moreover, in the rice cooker 100 according to the embodiment, a plurality of ribs 31 are provided inside the side surface portion of the upper lid 30, and each slit 64 is arranged at the same position as one of the plurality of ribs 31. ing.

According to the rice cooker 100 according to the embodiment, by aligning the positions of the slits 64 with the positions of the ribs 31, it is possible to prevent gaps from forming between the heat insulating material 60 and the upper lid 30. The storability in the lid body 2 can be ensured.

In addition, in the rice cooker 100 according to the embodiment, the lower ends of the ribs 31 are provided with claw portions 31a projecting downward, and the outer lower portions of the side surfaces of the lower lid 40 are provided with the claw portions 31a and the claw portions 31a. A claw receiving portion 42 to be fitted is provided.

According to the rice cooker 100 according to the embodiment, the upper lid 30 is attached to the lower lid 40 by hooking and fitting the claw portions 31 a onto the claw receiving portions 42 . Since each claw portion 31a is hooked on the claw receiving portion 42, each claw portion 31a is used for positioning when the upper lid 30 is attached to the lower lid 40, and the upper lid 30 is opened with respect to the lower lid 40 to create a gap between them. can be suppressed.

Moreover, in the rice cooker 100 according to the embodiment, the heat insulator 60 is made of a flame-retardant material.

According to the rice cooker 100 according to the embodiment, since the heat insulating material 60 is made of a flame-retardant material, if the lid heater 18 and the operating board 9 arranged around the heat insulating material 60 ignite, combustion will occur. Expansion can be suppressed.

Moreover, in the rice cooker 100 according to the embodiment, a plurality of first recesses recessed inward are provided along the circumferential direction on the side portion of the upper lid 30 or the lower lid 40 . The opening of each first recess is covered with a portion of the side surface of the lid 2 or the heat insulating side surface 62 of the heat insulating material 60, and the first recess and a portion of the side surface of the lid 2 or the heat insulating material 60 are covered. An air layer 34 is formed between the heat insulating side portion 62 and the heat insulating side portion 62 .

According to the rice cooker 100 according to the embodiment, the air layer 34 is a closed space, and the air inside does not move and has a heat insulating effect, so the heat insulating performance at the side surface of the lid 2 can be improved. .

In addition, in the rice cooker 100 according to the embodiment, the planar portion of the upper lid 30 or the lower lid 40 is provided with a second recess recessed inward. The opening of the second recess is covered with a portion of the planar portion of the lid 2 or the heat insulating planar portion 61, and an air layer is formed between the second recess and the portion of the planar portion of the lid 2 or the heat insulating planar portion 61. is formed.

According to the rice cooker 100 according to the embodiment, the air layer is a closed space, and the internal air does not move and has a heat insulation effect, so the heat insulation performance of the flat portion of the lid 2 can be improved.

Moreover, in the rice cooker 100 according to the embodiment, the inner pot 5 has the flange portion 5a positioned above the lower surface of the lid 2 when the lid 2 is closed.

According to rice cooker 100 according to the embodiment, heat insulating material 60 is provided so as to cover the side surface of lid 2 in addition to the flat surface of lid 2 . Therefore, the heat of the inner pot 5 can be prevented from escaping from above through the opening, and the heat of the inner pot 5 can be prevented from escaping from the side through the flange portion 5a. Therefore, the heat insulation performance can be improved.

Moreover, in the rice cooker 100 according to the embodiment, a holding portion 41 that holds the heat-insulating side portion 62 is provided at the outer lower portion of the side portion of the lower lid 40 .

According to the rice cooker 100 according to the embodiment, since the holding portion 41 is provided, the heat insulating material 60 can be attached to the lower lid 40, and displacement of the heat insulating side portion 62 in the circumferential direction can be suppressed. can.

Reference Signs List 1 main body 2 lid 3 outer lid 4 inner lid 5 inner pot 5a flange 6 steam discharge portion 8 substrate chamber 9 operation substrate 10 inner pot storage portion 11 hinge mechanism portion 11a hinge Axle 11b Hinge spring 12 Lid open/close button 13 Heating coil 14 Pot bottom temperature sensor 15 Body heater 16 Operation part 17 Lid heater plate 18 Lid heater 20 Steam vent 30 Top lid 30a Top outer lid 30b Top Inner lid, 31 rib, 31a claw, 32 slit, 33 recess, 34 air layer, 40 lower lid, 41 holding portion, 42 claw receiving portion, 43 opening, 44 recess, 46 inner lid locking portion, 60 heat insulating material , 61 heat insulation plane portion, 62 heat insulation side portion, 63 connection portion, 64 slit, 100 rice cooker.

Claims (13)

a body portion having an inner pot housing portion with an open upper surface;
an inner hook detachably attached to the inner hook housing;
a lid body that is rotatably attached to the main body and covers the opening of the inner pot housing so as to be openable and closable;
The lid is
a top lid forming the outer surface of the lid;
a lower lid disposed closer to the main body than the upper lid;
a thermal insulation material;
The heat insulating material
A heat-insulating plane portion arranged to cover the plane portion of the lower lid positioned above the opening of the inner pot storage portion when the lid body is closed, and a plane portion arranged to cover the side surface portion of the lower lid. and a heat-insulated side portion. The lid is
a lid heater for heating the inner pot from above;
an operation substrate accommodated in a substrate chamber formed below the upper surface of the lid;
The rice cooker according to claim 1, wherein the heat insulating plane portion is arranged above the lid heater and below the operation board. The opening formed in the lower lid is provided with a steam discharge part,
The rice cooker according to claim 1 or 2, wherein the heat insulating flat portion is arranged at a position covering a part of the steam discharge portion. The rice cooker according to any one of claims 1 to 3, wherein a plurality of slits are formed in the heat insulation side portion. A plurality of ribs are provided inside the side surface of the upper lid,
The rice cooker according to claim 4, wherein each of said slits is arranged at the same position as one of said plurality of ribs. A claw portion protruding downward is provided at the lower end portion of the rib,
The rice cooker according to claim 5, wherein a claw receiving portion that engages with the claw portion is provided at an outer lower portion of the side portion of the lower lid. The rice cooker according to any one of Claims 1 to 6, wherein the heat insulating material is made of a flame-retardant material. The heat insulating material has a sheet shape,
The rice cooker according to any one of Claims 1 to 7, wherein a connection portion between the heat insulating flat portion and the heat insulating side portion is bent. The heat insulating material
The rice cooker according to any one of claims 1 to 7, wherein the heat insulating side portion is a molded product provided in a direction perpendicular to the heat insulating plane portion. A plurality of inwardly recessed first recesses are provided along the circumferential direction on the side surface of the upper lid or the lower lid,
The opening of each of the first recesses is covered with a part of the side surface of the lid or the heat insulating side surface of the heat insulating material, and each of the first recesses and a part of the side surface of the cover or the heat insulating material The rice cooker according to any one of claims 1 to 9, wherein an air layer is formed between the heat insulating side portion. The planar portion of the upper lid or the lower lid is provided with a second recess recessed inward,
The opening of the second recess is covered with a part of the flat surface of the lid or the heat insulating flat surface, and an air layer is formed between the second recess and the part of the flat surface of the lid or the heat insulating flat surface. The rice cooker according to any one of claims 1 to 10, wherein is formed. The inner pot is
The rice cooker according to any one of claims 1 to 11, further comprising a flange portion positioned above the lower surface of the lid when the lid is closed. The rice cooker according to any one of Claims 1 to 12, wherein a holding portion that holds the heat insulating side portion is provided in a lower outer portion of the side portion of the lower lid.

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