JP2005278776A - Electric rice cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric rice cooker which hardly causes cooked rice to get sticky by increasing the amount of heat radiated at a heater unit at a shoulder part corresponding to a handle part of an inner pot than that of the other parts. <P>SOLUTION: The electric rice cooker comprises the inner pot equipped with the handle part, a main body of the rice cooker accommodating the inner pot to be taken out, a lid unit which is located at the upper part of the main part of the rice cooker and covers the upper part of the accommodated inner pot, a heat radiating plate provided inside the lid unit, and first and second heater units which are provided at the position other than a handle accommodating part of the inner pan at the shoulder part of the main body of the rice cooker and heat the heat radiating plate by abutting on the heat radiating plate. The first and second heater units are constituted to have a larger amount of heat radiated at the part corresponding to the handle part of the inner pot than that of the other parts. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  This invention relates to the electric rice cooker by which the handle part was provided in the inner pot.

  Conventionally, in some products, for example, an electric rice cooker provided with a handle portion for taking out or storing the inner pot on the left and right of the inner pot in which the rice is stored is provided. In this way, when there is a handle on the left and right of the inner pot, it is convenient for storing and taking out the inner pot, and it is also necessary when the temperature of the inner pot is higher than the predetermined temperature, such as during warming. The take-out operation becomes possible (see Patent Document 1).

  On the other hand, in a conventional electric rice cooker, a shoulder heater is provided in a ring shape around the shoulder part of the rice cooker body, while a large-diameter heat dissipation whose peripheral part extends to the shoulder part inside the corresponding lid unit. There is also a type in which a plate is provided and the entire heat radiating plate is heated from the periphery by the shoulder heater (see Patent Document 1).

  However, in such an electric rice cooker equipped with a shoulder heater around the shoulder of the rice cooker main body, when trying to adopt the inner pot structure having the handle portion as described above, the left and right shoulder portions of the corresponding rice cooker main body Therefore, the shoulder heater must be divided into first and second front and rear two sets of semi-arc heater units. Each of the second two sets of heater units is installed by connecting them in series or in parallel to the power supply using lead wires.

JP-A-9-37935 (Specification No. 1-7, FIG. 1-10)

  However, in the case of the shoulder heater having the conventional configuration, the width of the heat transfer surface that comes into contact with the heat radiation plate of the first and second front and rear two sets of shoulder heater units is constant over the entire circumferential direction. Therefore, the heat radiation amount is also constant over the entire circumferential direction, and there is no heat radiation action at the portion corresponding to the handle portion of the inner pan, so the heating temperature is at the portion corresponding to the handle portion of the lid unit side heat sink. It becomes low and a sticky state occurs, causing stickiness of rice. In addition, since the shoulder heater is generally formed by a heater ring and a pipe heater, the width in the radial direction and the height in the vertical direction are relatively large, leading to an increase in the size of the rice cooker body and the maintenance of the shoulder. Has the problem of becoming difficult.

  The invention of the present application was made to solve such a problem, and by making the heat radiation amount of the shoulder heater unit portion corresponding to the handle portion of the inner pot larger than other portions, The purpose is to provide a rice cooker.

  In order to achieve the above object, the present invention is configured with the following problem solving means.

(1) 1st subject solution means The 1st subject solution means of this invention is the upper part of this rice cooker main body which has an inner pot provided with the handle part, the rice cooker main body which accommodates this inner pot so that it can take out. The lid unit covering the upper part of the stored inner pot, the heat sink provided inside the lid unit, and the position of the shoulder portion of the rice cooker body excluding the handle storing part of the inner pot The first and second heater units are in contact with the heat radiating plate and heat the heat radiating plate. The first and second heater units release the portion corresponding to the handle portion of the inner pot. The heat quantity is configured to be larger than the heat radiation quantity of other parts.

  According to such a configuration, the amount of heat transfer to the heat sink near the inner pot handle portion increases, and the temperature of the heat sink increases, so that it becomes difficult to cause the conventional stickiness and reduces stickiness of rice. be able to.

(2) Second Problem Solving Means According to a second problem solving means of the present invention, in the configuration of the first problem solving means, the first and second heater units are heat transfer surfaces that are in contact with the heat sink. The heat transfer area is larger than the heat transfer area of other portions.

  According to such a configuration, it is possible to easily increase the amount of heat transfer to the heat radiating plate only by expanding the heat transfer area for the heat radiating plate only to the portion corresponding to the handle portion of the inner pot, and to dissipate heat. Since the temperature of the plate also rises, it becomes difficult to cause the conventional stickiness, and the stickiness of the rice can be reduced.

(3) Third Problem Solving Means According to a third problem solving means of the present invention, in the configuration of the second problem solving means, the first and second heater units are located inside the heat transfer area expanding portion. A connection portion between the internal heater wire and the external lead wire is provided.

  In order to achieve a compact shoulder heater, the radial width of the shoulder heater may be reduced. However, the connecting portion between the internal heater wire and the external lead wire on both sides of the shoulder heater requires a caulking member and an insulating tube, so that it is difficult to make the diameter smaller than the current size.

  Therefore, these connecting portions are provided in the heat transfer area expansion portion with the heat sink, and the other portions are made as small as possible, so that the entire shoulder heater (particularly in the front-rear direction) can be made compact. . As a result, it is possible to reduce the width in the front-rear direction of the rice cooker body and improve the care of the shoulder.

(4) Fourth Problem Solving Means According to a fourth problem solving means of the present invention, in the configuration of the second or third problem solving means, the enlarged portion of the heat transfer area has the width of each heater unit in the radial direction. It is characterized by being formed by enlarging only outward.

  According to such a configuration, the expansion of the size of the shoulder heater is only required in the horizontal direction of the rice cooker body with the handle, and the size in the front-rear direction can be made as small as possible. It is possible to reduce the width of the main body in the front-rear direction and improve the care of the shoulder.

(5) Fifth Problem Solving Means According to a fifth problem solving means of the present invention, in the configuration of the third or fourth problem solving means, each heater unit is accommodated in the heater ring and the heater ring. It consists of a pipe heater, and in the part other than the enlarged part of the heat transfer area, the pipe heater part is provided in contact with the radially inner peripheral surface side of the heater ring.

  According to such a configuration, it becomes possible to more effectively reduce the width in the front-rear direction of the rice cooker body and improve the care of the shoulder.

  Moreover, the improvement of the heating effect not only to the heat radiating plate but also to the inner pot opening edge side can be expected, and the stickiness of rice can be improved more effectively.

  As a result, according to the electric rice cooker of the present invention, the following beneficial effects can be obtained.

  (1) Since it is possible to improve the temperature of the heat sink (and the inner pot) near the handle portion of the inner pot, it is possible to eliminate the stickiness of rice due to the sticking at the same portion, and the heat retention performance is improved.

  (2) The size of the shoulder heater in the radial direction can be reduced as much as possible except for the vicinity of the handle portion of the inner pot located on the left and right. This will improve the care of the shoulder heater.

  1-10 has shown the structure of the shoulder heater part in the rice cooker main body of the electric rice cooker which concerns on the best embodiment for implementing this invention, and the rice cooker main body.

(Configuration of the rice cooker body)
First, as shown in FIG. 1 and FIG. 2, for example, the electric rice cooker body has an inner pot made of a magnetic metal plate such as a stainless steel plate that can be self-heated by an eddy current induced therein. ) 3, a synthetic resin bottomed cylindrical inner case (protective frame) 4 formed so that the inner pot 3 can be detachably stored and set, and an outer casing that holds the inner case 4 A bottomed cylindrical outer case 1 and a lid unit 2 that can be opened and closed at the top of a rice cooker main body formed by integrating the outer case 1 and the inner case 4 together.

A coil base 5 is provided on the lower side of the bottom wall (bottom) 4a of the inner case 4, and the bottom wall (bottom of the inner pot 3) is disposed on the upper portion thereof via ferrite cores 6a, 6a. 2) Two sets of work coils C ₁ and C ₂ each having a litz wire wound concentrically corresponding to both the central side and the side side of 3a have a predetermined distance between them. It is provided so as to wrap the entire bottom wall 3a of the inner pot 3, and when energized, an eddy current is induced in the inner pot 3 to heat the whole substantially uniformly. The ferrite cores 6a, 6a,... Are attached via ferrite core support members 6, 6,.

  The outer case 1 includes, for example, a substantially cylindrical frame member 1a formed of a synthetic resin material in the vertical direction, a synthetic resin shoulder member 7 coupled to an upper end portion of the frame member 1a, and the frame member 1a. A bottom member 1b made of a synthetic resin integrated with the lower end of the inner cover 4 and a metal cover member 1c wound around the side portion of the frame member 1a in a cylindrical shape. A tubular body with a bottom that is slightly longer in the front-rear direction as a whole is formed as a whole with a predetermined area of heat insulation and ventilation space formed between the wall 4a.

  Further, a center sensor storage space portion (center sensor fitting hole) 8 that is concentrically penetrated in the vertical direction is formed in the central portion of the coil base 5 on the lower side of the inner case 4. A center sensor 9 having an inner pot temperature detection sensor and an inner pot detection switch is provided in the portion 8 in a state that it can be moved up and down in the vertical direction and is always upwardly biased by a coil spring.

(Configuration of lid unit)
On the other hand, the lid unit 2 is provided under the synthetic resin outer cover 21 constituting the outer peripheral surface thereof, the inner cover 22 fitted inside the outer peripheral edge of the outer cover 21, and the inner cover 22. The inner peripheral edge of the inner cover 22 and the upper edge 3b of the inner pot 3 and the corresponding metal heat sink 23 via the poly cover packings 10a and 10b form a hollow heat insulation structure. Has been. The poly cover packing 10a is provided so as to be fitted inside the recess 23b toward the upper side on the outer peripheral side of the heat sink 23.

  The lid unit 2 is attached to the shoulder member 7 at the upper part of the outer case 1 via a hinge mechanism 11 so as to be rotatable from the front to the rear and vice versa. A lock mechanism 12 that engages with a predetermined position of the lid unit 2 to open and close the lid unit 2 in the vertical direction is provided. Moreover, the vapor | steam discharge | release apparatus 13 for releasing the vapor | steam provided with the pressure regulation function is provided in the approximate center part.

(Configuration of shoulder heater unit)
Further, the outer periphery of the side wall portion (side portion) 4c of the inner case 4 in correspondence with the side wall portion (side portion) 3c of the inner pot 3 is provided with heat insulation heater H _1, the inner bowl 3 at the time of insulation The side wall portion 3c is effectively heated. Further, the inner edge portion 72 of the shoulder member 7 engaged with the upper end side edge portion 4b projecting outward in the radial direction of the predetermined width of the inner case 4 is connected to the inner edge 72 portion via the shoulder ring 74 over substantially the entire circumference. (However, the portion corresponding to the handle portion of the left and right sides of Uchinabe 3 as described below except), for example, shoulder heater H ₂ is provided as shown in FIG. 2, during cooking and insulation, the inner cover The heat sink 23 on the lower side of 22 is heated from the outer peripheral edge 23 a side toward the center side, thereby contributing to the heating of the upper surface side of the inner pot 3 and the condensed droplets generated on the lower surface portion of the heat sink 23. Evaporates quickly to prevent white blur and stickiness of rice.

  By the way, in the case of the best embodiment, the inner pot 3 is provided with a handle that is located on both the left and right sides and protrudes outward in a predetermined width radial direction (positioned in the front-rear direction in FIG. 1). 1 is not visible in the cross-sectional view cut in the front-rear direction at the center of FIG. 1), the shoulder member 7 on the outer case 1 and the inner case 4 constituting the rice cooker body has its inner peripheral side edge Corresponding to the handle on the inner pot 3 side from 72 to the outer peripheral side edge 71 position, for example, recesses 40L and 40R for storing the handle are provided on both the left and right sides as shown in FIG.

The shoulder heater H ₂ is divided into a pair of front and rear paired first and second semicircular arc heater units H ₂₁ and H ₂₂ as shown in FIG. 2, for example. They are arranged on both the front and rear sides of the rice cooker body as shown in FIG. ₂ and are connected to each other with connection connectors C ₁ and C ₂ via external lead wires 45 and 45 shown in FIG. Yes. Note that P ₁ and P ₂ in FIG. 3 are power supply side plugs that are also provided via external lead wires 45 and 45 at their opposite ends.

The first and second heater units H ₂₁ and H ₂₂ are configured as shown in FIGS. 3 and 4, for example.

  That is, first, the overall shape is substantially semicircular, and the front side semicircular arc portion and the rear side are defined based on (except for) the handle storing concave portions 40L and 40R of the rice cooker main body side shoulder 7. It is installed corresponding to the semicircular arc part. The heat radiation amount (heat transfer amount) to the heat radiating plate 23 side of the lid unit 2 is large at both end sides corresponding to (facing) the handle storing recesses 40L and 40R, respectively, and is separated from the handle storing recesses 40L and 40R. Further, it is formed so as to be small in the front-rear direction side intermediate portion.

  For that purpose, for example, specifically, configurations as shown in FIGS. 4 to 10 are employed.

That is, the first and second heater units H ₂₁ and H ₂₂ are basically in contact with the flat lower surface having a predetermined width of the outer peripheral edge 23a of the heat radiating plate 23 on the lid unit 2 side. A heater ring 42 for transferring the heat from the heater wire 43 to the heat radiating plate 23, a heater pipe 41 in the heater ring 42 for housing the heater wire 43, and the heater pipe 41. A heater wire 43 that is a stored heat source is provided.

The heater wire 43 has both ends 43b and 43b on the external lead wires 45 and 45 to the power plugs P ₁ and P ₂ or the connection connectors C ₁ and C ₂ via fixed terminals 44 and 44 having a caulking connection structure. To be connected. Reference numerals 44 a and 44 b denote fitting cylinder portions for caulking with the heater wire 43 and the external lead wire 45 on both sides of the fixed terminal 44.

  Further, the heater pipe 41 incorporating the heater wire 43 has, as shown in detail in FIGS. 9 and 10, for example, on both end portions 41 b and 41 b side where the heat radiation amount (heat transfer amount) to the heat radiating plate 23 is increased. Convex shape on the bottom portion 74b of the groove portion for installing the heater unit of the shoulder ring 74 so as to be located in the center of the heater ring 42 in the radial direction and in contact with the lower surface of the upper surface portion of the heater ring 42. Is supported and installed on the rib 74e. On the other hand, in the intermediate portion 41a portion between both end portions 41b and 41b, as shown in detail in FIGS. 6 to 8, for example, a substantially semi-cylindrical structure in which the radially outer side is an arc surface and the radially inner side is a flat surface. It has a (substantially half-moon structure) with a width narrowed to about ½, and is placed in close contact with the radially inner side wall surface of the heater ring 42. And the caulking connection part (fixed terminal 44 part) with the external lead wires 45, 45 of the heater 43 is arranged so that the whole is located in the large-diameter cylindrical part on both ends 41b, 41b side of the heater pipe 41. The outer periphery is surrounded by a silicon tube 47, and sufficient insulation is secured (see FIGS. 4 and 10).

  The heater ring 42 has a semicircular arc shape as a whole and has an inverted U-shaped cross section as shown in FIGS. 3 to 10, for example. Similar to the heater pipe 41, the width (radial width) of the upper surface contacting the peripheral edge 23a is wide at the both ends 42b, 42b and narrow at the intermediate 42a, and both ends 42b, The cylindrical portion of the heater pipe 41 having the large diameter is accommodated in the above-described state in the space between the front and rear side walls having a large width on the side of 42b.

  The widths of both end portions 42b, 42b are expanded by expanding only the outer peripheral side radially outward.

  On the other hand, the heater ring 42 is provided on the inner edge 72 of the shoulder member 7 via the shoulder ring 74 as described above. The shoulder ring 74 is, for example, an inner peripheral side support wall portion 74a. The lower end of the inner case 4 is locked and supported on the inner peripheral end of the upper end side edge 4b of the inner case 4, and as shown in FIGS. 6 to 10, the outer peripheral side engagement of the outer peripheral side standing wall 74c. The rib portion is engaged and supported on the vertical wall portion 72a erected from the center of the upper surface portion of the shoulder member 7, and a groove portion for installing the heater unit between the support wall portion 74a and the erected wall 74c is further supported. As shown in FIG. 7, a hook-like locking piece 76 extends downward from the bottom 74 b and engages in the engagement hole 77 of the inner peripheral edge 72 of the lower shoulder member 7 to ensure It is supposed to be fixed to. Then, the above-mentioned heater wire 43 and heater pipe 41 which are covered at the upper side by the above-mentioned inverted U-shaped heater ring 42 in the groove portion for installing the heater unit extending in a semicircular arc shape on the upper surface side of the shoulder ring 74 The pipe heater having such a structure is installed in a fitted state as shown in FIGS.

  Further, as shown in FIGS. 5 and 8, a bottom 74 b of the groove portion for installing the heater unit of the shoulder ring 74 is formed at a predetermined position on the side wall portion on the inner peripheral side of the heater ring 42. Engagement holes and engagement ribs 74d that are bent and engaged after the engagement pieces 46a and 46b are inserted are provided, whereby the heater ring 42 and the pipe heater (the heater pipe 41 and the heater wire 43) are provided. The shoulder ring 74 is securely locked and fixed to the bottom 74b of the recessed groove portion for installing the heater unit.

9 and 10, the convex rib 74e at the center of the upper surface of the bottom 74b of the concave groove for installing the heater unit is provided on both end sides of the first and second heater units H ₂₁ and H ₂₂ . In this case, the position regulation is such that the heater pipes 41b and 41b having a cylindrical cross section are in close contact with the heat transfer surface of a wide area with the upper surface side heat radiation plate 23 of both ends 42b and 42b of the wide heater ring 42. It is a member.

(Other configurations)
Furthermore, whereas as a heating means for heating the Uchinabe 3 as described above when adopting the work coil C _1, C _2, ferrite core 6a, through 6a · · · and the like from the work coil C _1, C ₂ The magnetic flux is made to converge and act on the inner pot 3 side as effectively as possible so as not to leak to the outside.

  However, in the state as it is, a certain amount of magnetic flux inevitably acts on the outside. As a result, for example, if the metal cover member 1c is used on the side wall portion of the outer case 1 as described above for reasons of design, the cover member 1c may be heated.

In order to solve such a problem, a ring-shaped metal magnetic shielding member 30 is provided on the outer periphery of the work coils C ₁ and C ₂ as shown in the figure to shield the magnetic flux acting on the outside. Like to do.

Then, the magnetic shielding member 30 is polygonal ring member structure as shown in FIG. 2 a strip-shaped metal plate having a predetermined height width in the vertical direction in accordance with the winding width of the work coil C ₂ of the outer peripheral side The coil which is formed in the outer pan 3 and the outer periphery of the work coil C ₂ provided corresponding to the bottom 4a of the inner case 4 and supports the work coils C ₂ and C ₁ Between the base 5 side ferrite core support member 6 and the support rib on the bottom member 1b at the bottom of the outer case 1, and between the support rib 27 on the back surface 15d side of the control board cover 15a and the fan casing of the cooling fan 19. It is supported by sandwiching.

  On the other hand, the front side of the rice cooker body extends long forward while tilting the entire frame member 1a of the outer case 1 downward, so that the operation panel 25 having a tapered surface structure is installed on the upper surface side. The microcomputer board 16 provided with the control board 15, the control board cover 15a, various operation components 26, the microcomputer board cover 16a, the power supply board 17, the power supply board cover 17a, and the heat sink 18, an electrical component installation space 20 such as a blower fan 19 is formed.

  The control board 15 is configured by installing electronic parts for controlling work coil drive such as IGBT, and the front face of the control board cover 15a extending in the vertical direction adjacent to the front face portion of the inner case 4 as a support body. It is fixedly attached to the side. The control board cover 15a uses a pair of engaging edges provided in a hook shape on both the left and right sides of the upper end of the control board cover 15a, and the connecting edge of the shoulder member 7 on the upper end 4b of the inner case 4 (not shown). The heat sink 18 and the cooling blower fan 19 are integrally attached to the lower part 15c.

(Function and effect)
As described above, in the configuration of the present invention, as its basic configuration, the inner pan provided with the handle portion, the rice cooker main body that stores the inner pan so that it can be removed, and the upper portion of the rice cooker main body, the above storage The heat sink is installed at a position excluding the lid unit that covers the upper part of the inner pot, the radiator plate provided inside the lid unit, and the handle storage part of the inner pot on the shoulder of the rice cooker body. The first and second heater units are in contact with the plate and heat the heat radiating plate, and the first and second heater units have a heat radiation amount in a portion corresponding to the handle portion of the inner pot, It is configured to be larger than the heat dissipation amount of the part.

  According to such a configuration, the amount of heat transfer to the heat sink near the inner pot handle portion is increased and the temperature of the heat sink is also increased, so that it is difficult for the conventional sticking to occur and the stickiness of rice is reduced. be able to.

  In that case, in the first and second heater units, the heat transfer area of the heat transfer surface in contact with the heat radiating plate is larger than the heat transfer area of the other portions.

  According to such a configuration, it is possible to easily increase the amount of heat transfer to the heat radiating plate only by expanding the heat transfer area for the heat radiating plate only to the portion corresponding to the handle portion of the inner pot, and to dissipate heat. Since the temperature of the plate also rises, it becomes difficult to cause the conventional stickiness, and the stickiness of the rice can be reduced.

  The first and second heater units are provided inside the heat transfer area expanding portion and provided with a connection portion between the internal heater wire and the external lead wire.

  In order to achieve a compact shoulder heater, the radial width of the shoulder heater may be reduced. However, the connecting portion between the internal heater wire and the external lead wire on both sides of the shoulder heater requires a caulking member and an insulating tube, so that it is difficult to make the diameter smaller than the current size.

  Therefore, these connecting portions are provided in the heat transfer area expansion portion with the heat sink, and the other portions are made as small as possible, so that the entire shoulder heater (particularly in the front-rear direction) can be made compact. . As a result, it is possible to reduce the width in the front-rear direction of the rice cooker body and improve the care of the shoulder.

  Furthermore, the enlarged portion of the heat transfer area is formed by expanding the width of each heater unit only outward in the radial direction.

  According to such a configuration, the expansion of the size of the shoulder heater is only required in the horizontal direction of the rice cooker body with the handle, and the size in the front-rear direction can be made as small as possible. It is possible to reduce the width of the main body in the front-rear direction and improve the care of the shoulder.

  Further, each of the first and second heater units includes a heater ring and a pipe heater accommodated in the heater ring. The pipe heater portion of the heater ring is the portion other than the enlarged portion of the heat transfer area. It is provided in contact with the radially inner peripheral surface side.

  According to such a configuration, it becomes possible to more effectively reduce the width in the front-rear direction of the rice cooker body and improve the care of the shoulder.

  Moreover, the improvement of the heating effect not only to the heat radiating plate but also to the inner pot opening edge side can be expected, and the stickiness of rice can be improved more effectively.

  As a result, according to the electric rice cooker of the present invention, the following beneficial effects can be obtained.

  (1) Since it is possible to improve the temperature of the heat sink (and the inner pot) near the handle portion of the inner pot, it is possible to eliminate the stickiness of rice due to the sticking at the same portion, and the heat retention performance is improved.

  (2) The size of the shoulder heater in the radial direction can be reduced as much as possible except for the vicinity of the handle portion of the inner pot located on the left and right. This will improve the care of the shoulder heater.

(Other best embodiments)
In the above configuration, the pair of front and rear first and second heater units H ₂₁ and H ₂₂ are structurally completely divided and connected by the external lead wires 45 and 45 and the connection connectors C ₁ and C ₂ . However, the heater unit is composed of, for example, a substantially C-shaped heater as a whole, and the connection portion corresponding to the handle portion of the inner pot 3 is released downward in a U shape. A similar effect may be obtained by using a (curved) configuration.

  If it does in this way, the heat-transfer performance to the inner pot near a handle part will improve more at low cost, and a care property will also become good.

It is sectional drawing which shows the structure of the whole rice cooker main body of the electric rice cooker which concerns on best Embodiment 1 of this invention. It is the top view which removed the lid unit and the inner pot of the rice cooker main body, and was seen from the upper side. It is a bottom view of the state which removed the 1st, 2nd heater unit installed in the shoulder part of the rice cooker main body. It is an enlarged view of the principal part of the 1st, 2nd heater unit of the rice cooker main body. It is a rear view which shows the bottom part side of the heater ring of the 1st, 2nd heater unit of the rice cooker main body upwards, and makes the upper side downward. It is sectional drawing (FIG. 2A-A) which shows the structure of the 1st shoulder heater installation position of the rice cooker main body. It is sectional drawing (FIG. 2B-B) which shows the structure of the 2nd shoulder heater installation position of the rice cooker main body. It is sectional drawing (FIGS. 2C-C) which shows the structure of the 3rd shoulder heater installation position of the rice cooker main body. It is sectional drawing (FIGS. 2D-D) which shows the structure of the 4th shoulder heater installation position of the rice cooker main body. It is sectional drawing (FIG. 2E-E) which shows the structure of the 5th shoulder heater installation position of the rice cooker main body.

Explanation of symbols

1: Outer case 1a: Frame member 1b: Bottom member 1c: Cover member 2: Lid unit 4: Inner case 5: Coil base 40L, 40R: Recess for storing handle 41: Heater pipe 42: Heater ring 43: Heater wire 44: Fixed terminal 45: External lead wire H ₂ : Shoulder heater H ₂₁ : First heater unit H ₂₂ : Second heater unit

Claims (5)

  An inner pot provided with a handle, a rice cooker main body that detachably stores the inner pot, a lid unit that is on the upper portion of the rice cooker body and covers the upper side of the stored inner pot, and the lid unit It is installed in the position except the heat sink which was provided inside, and the handle storage part of the inner pot of the shoulder part of the above-mentioned rice cooker body, and contacts the above-mentioned heat sink and heats the above-mentioned heat sink The first and second heater units are configured such that the heat dissipation amount of the portion corresponding to the handle portion of the inner pot is larger than the heat dissipation amount of the other portions. Electric rice cooker.   2. The electric rice cooker according to claim 1, wherein the first and second heater units have a heat transfer area of a heat transfer surface in contact with the heat radiating plate that is larger than that of other portions. vessel.   3. The electric rice cooker according to claim 2, wherein the first and second heater units are provided inside the heat transfer area expanding portion and provided with a connection portion between the internal heater wire and the external lead wire. .   The electric rice cooker according to claim 2 or 3, wherein the enlarged portion of the heat transfer area is formed by expanding the width of each heater unit only outward in the radial direction.   Each heater unit is composed of a heater ring and a pipe heater accommodated in the heater ring, and the pipe heater portion is in contact with the radially inner peripheral surface side of the heater ring in portions other than the enlarged heat transfer area. It is provided, The electric rice cooker of Claim 3 or 4 characterized by the above-mentioned.

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