JP2005296182A - Electric rice cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To apply one electric rice cooker to two different modes of a mode with an inner lid or a mode without the inner lid only by attaching or detaching the inner lid. <P>SOLUTION: The electric rice cooker comprises a rice cooker body 1 with a built-in rice container 3, a lid body 2 for closely covering and closing the rice cooker body 1 in such a way that the rice cooker body can be opened/closed, and the inner lid 39 detachably attached to the lower surface of the lid body 2 facing the interior of the rice container 3. The rice cooker makes it possible to boil rice in two different modes: the mode with the inner lid in which the inner lid 39 is attached and the mode without the inner lid in which the inner lid 39 is detached, so that the one electric rice cooker is applicable to the two different modes with/without the inner lid by attaching/detaching the inner lid. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an electric rice cooker, and more particularly to an electric rice cooker capable of cooking with two types of specifications, a specification with an inner lid or a specification without an inner lid.

  A general electric rice cooker is configured to include a rice cooker body with a built-in rice cooker and a lid body that covers the rice cooker body so that the rice cooker body can be opened and closed, and a heat sink attached to the lower surface of the lid body. The rice in the rice cooker can be heated by heat dissipation of the rice (see Patent Document 1).

  In addition, an electric rice cooker that is attached to the bottom surface of the lid so as to be detachable and faces the inside of the rice cooker so as to soften the drying of the rice during heat insulation by heat radiation from the heat sink. It has been proposed (see Patent Document 2).

Japanese Utility Model Publication No. 7-43581.

Japanese Patent Laid-Open No. 5-15437.

  However, the electric rice cookers disclosed in Patent Documents 1 and 2 are provided separately, and one electric rice cooker is one with an inner lid or one without an inner lid. Couldn't cook as. Therefore, the electric rice cooker with a specification with an inner lid and the electric rice cooker with a specification without an inner lid have to be manufactured separately, and there has been a problem that the respective costs have to be increased.

  The present invention has been made in view of the above points, and by only attaching and detaching the inner lid, one electric rice cooker can correspond to two types of specifications: an inner lid specification and an inner lid specification. The purpose is to do so.

  In this invention, as a 1st means for solving the said subject, the rice cooker main body which incorporated the rice cooker, the cover body which covers this rice cooker main body openably and closably, and with respect to the lower surface of this cover body In an electric rice cooker comprising an inner lid that is detachably attached and faces the rice cooker, a specification with an inner lid with the inner lid attached, and a specification without an inner lid with the inner lid removed It is possible to cook rice with two specifications.

  By comprising as mentioned above, in one electric rice cooker, rice cooking by the specification of two types, the specification with an inner lid, and the specification without an inner lid is attained by attaching and detaching the inner lid. As a result, the degree of freedom of use for the user is greatly increased and the cost is reduced.

  In the present invention, as a second means for solving the above-mentioned problem, in the electric rice cooker provided with the above-mentioned first means, a neva inserted into the steam passage inlet of the lid body in the inner lid. A return member is detachably attached. In the specification with an inner lid, the inner cover is attached by inserting the return member into the steam passage inlet, whereas in the specification without an inner lid, only the return member is attached. It can also be attached to the steam passage inlet, and in such a case, the specification change between the specification with the inner lid and the specification without the inner lid is inserted into the steam passage inlet which is a common member. This can be done depending on whether or not the inner lid is attached to or detached from the Neva return member, and there is no need to change the structure of the rice cooker body or lid.

  In the present invention, as a third means for solving the above-mentioned problems, in the electric rice cooker provided with the first or second means, a heat sink having a lid heater is provided on the lower surface of the lid. At the same time, the output of the lid heater at the time of heat insulation can be set to be larger in the case of the specification with the inner lid than in the case of the specification without the inner lid. However, the surface of the rice is not dried too much at the time of heat insulation, and a good heat insulation state can be maintained for a long time.

  In this invention, as a 4th means for solving the said subject, the rice cooker main body which incorporated the rice cooker, the cover body which covers this rice cooker main body openably and closably, and with respect to the lower surface of this cover body In an electric rice cooker comprising an inner lid that is detachably attached and faces the rice cooker, the inner lid in a state where the inner lid is attached by changing the specifications of one member constituting the lid It is possible to cook rice with two specifications: a specification with the presence and a specification without the inner lid with the inner lid removed.

  By configuring as described above, it becomes possible to attach and detach the inner lid only by changing the specification of one member constituting the lid, and only by changing the specification of one member, the specification with the inner lid and the specification without the inner lid. It is possible to correspond to the two types of specifications. As a result, the degree of freedom of use for the user is greatly increased and the cost is reduced.

  In the invention of the present application, as a fifth means for solving the above problems, in the electric rice cooker provided with the fourth means, a heat sink equipped with a lid heater is attached to the lower surface of the lid body, The heat sink can be a single member whose specifications are changed. In such a case, the inner lid can be attached and detached only by changing the specifications of the heat sink. Two types of specifications, a specification with a lid and a specification without an inner lid, can be supported.

  In the present invention, as a sixth means for solving the above-mentioned problem, in the electric rice cooker provided with the fifth means, the length of the heater wire of the lid heater is set as compared with the case with the inner lid specification. It can be set to be longer in the case of the specification without the inner lid, and in such a configuration, in the case of the specification without the inner lid, the arrangement area of the lid heater on the heat sink can be increased, but the inner lid With the specification with heat sink, the installation area of the cover heater on the heat sink has to be reduced by changing the heat sink specifications, and the length of the heater wire of the cover heater has no inner cover than the specification with the inner cover. The case can be longer. As a result, the heating power of the lid heater is smaller in the specification with the inner lid than in the specification without the inner lid, but there is an air layer between the lid and the inner lid in the specification with the inner lid. Therefore, even if the heating power is reduced, there is no problem, and the cost is reduced by the amount that the heater wire is shortened.

  According to the first means of the present invention, the rice cooker body incorporating the rice cooker, the lid body that covers the rice cooker body so as to be openable and closable, and the bottom surface of the lid body are detachably attached. In an electric rice cooker provided with an inner lid facing the rice cooker, the specification with the inner lid with the inner lid attached and the specification without the inner lid with the inner lid removed Because it is possible to cook rice, one electric rice cooker can support two types of specifications, with and without an inner lid, by attaching and detaching the inner lid, greatly increasing the user's freedom of use. At the same time, it has the effect of reducing costs.

  As in the second means of the present invention, in the electric rice cooker provided with the first means, the inner cover is detachably attached to the inner lid, and a return member inserted into the steam passage inlet of the lid is attached. In the specification with the inner lid, the inner cover is attached by inserting the return member into the steam passage inlet, while in the specification without the inner lid, only the return member is attached to the steam passage inlet. In such a configuration, the specification change between the specification with the inner lid and the specification without the inner lid can be made by changing the specification of the inner lid to the return member inserted into the steam passage inlet which is a common member. It can be performed depending on whether or not it is attached or detached, and it is not necessary to change the structure of the rice cooker body or the lid.

  As in the third means of the present invention, in the electric rice cooker provided with the first or second means, a heat radiating plate having a lid heater is attached to the lower surface of the lid body, and the lid is kept warm. The heater output can also be set to be larger for the specification with the inner lid than for the specification without the inner lid. Is not dried too much and can maintain a good heat-retaining state for a long time.

  According to the 4th means of this invention, the rice cooker main body which incorporated the rice cooker, the lid body which covers the rice cooker main body so that opening and closing is possible, and it is detachably attached to the lower surface of the lid body. In the electric rice cooker provided with an inner lid facing the rice cooker, by changing the specification of one member constituting the lid body, the specification with an inner lid with the inner lid attached, Since the rice can be cooked in two specifications, with the inner cover without the lid removed, the inner lid can be attached and detached only by changing the specifications of one member constituting the lid. With one electric rice cooker, it is possible to respond to two types of specifications, with and without an inner lid, by simply changing the specifications of one member that makes up the lid, greatly increasing the user's freedom of use. At the same time, it has the effect of reducing costs.

  As in the fifth means of the present invention, in the electric rice cooker provided with the fourth means, a heat radiating plate provided with a lid heater is attached to the lower surface of the lid body, and the heat radiating plate is modified in specifications. In such a configuration, the inner lid can be attached and detached only by changing the specifications of the heat sink, and the specifications with and without the inner lid can be changed by changing the specifications of only the heat sink. The two types of specifications can be handled.

  As in the sixth means of the present invention, in the electric rice cooker provided with the fifth means, the length of the heater wire of the lid heater in the case of the specification without the inner lid than in the specification with the inner lid In such a configuration, the area where the lid heater is installed on the heat sink can be increased when the inner cover is not specified. The area of the lid heater on the heat sink must be reduced by changing the specification, and the heater wire length of the lid heater can be made longer in the case without the inner lid than in the case with the inner lid. As a result, the heating power of the lid heater is smaller in the specification with the inner lid than in the specification without the inner lid, but there is an air layer between the lid and the inner lid in the specification with the inner lid. Therefore, even if the heating power is reduced, there is no problem, and the cost is reduced by the amount that the heater wire is shortened.

  Hereinafter, several preferred embodiments of the present invention will be described with reference to the accompanying drawings.

First Embodiment FIGS. 1 and 2 show an electric rice cooker according to a first embodiment of the present invention.

  As shown in FIG. 1, this electric rice cooker is configured so that a rice cooker 3 for cooking rice can be accommodated therein, and has a double structure rice cooker body 1 having a space portion 4, and the rice cooker body 1. And a lid body 2 that hermetically covers and opens the upper opening.

  The rice cooker main body 1 includes an outer case 5 that is an integrally molded product of a synthetic resin including a body 5a that constitutes an outer wall and a bottom 5b that constitutes a bottom wall, and a shoulder member made of synthetic resin that constitutes a shoulder. 6 and a synthetic resin bottomed cylindrical protective frame 7 constituting the inner peripheral wall, and the space 4 is formed surrounded by the outer case 5, the shoulder member 6 and the protective frame 7. Yes. In addition, in the said protective frame 7, the said rice cooker 3 is accommodated so that extraction is possible.

  A sensor hole 9 is formed at the center of the bottom surface of the protective frame 7 for allowing the center sensor 8 to act as temperature detecting means for detecting the rice cooker temperature.

  An annular electromagnetic induction coil (hereinafter referred to as an IH coil) 10 that acts as a heating means during rice cooking so as to surround the sensor hole 9 is a bent portion between the bottom surface of the protective frame 7 and the bottom surface to the side peripheral surface. It is arranged corresponding to. The IH coil 10 generates an alternating magnetic field (in other words, an electromagnetic wave), generates an induced eddy current in the rice cooker 3 by electromagnetic induction of the alternating magnetic field, and uses the resistance heat of the induced eddy current. The rice cooker 3 is then heated. The rice cooker 3 is made of a material (for example, a magnetic material) that can generate an induced eddy current by the IH coil 10.

  The IH coil 10 is sandwiched between a coil die 11 fixed to the bottom surface of the protective frame 7 and the bottom surface of the protective frame 7. Reference numeral 12 denotes a ferrite core, and four wires are arranged radially below the IH coil 10 so as to shield the magnetism of the IH coil 10 from affecting the equipment existing below. Eggplant.

  A center sensor 8 is provided in the sensor hole 9 so as to contact the bottom of the rice cooker 3. Further, a heat retaining heater 13 that acts as a heating means during heat retaining is attached to the side peripheral surface of the protective frame 7. An IH coil may be employed in place of the heat retaining heater 13.

  Electronic components such as a power transistor and a rectifier diode bridge (not shown) for performing energization control of the IH coil 10 are cooled at the bottom of the rice cooker body 1 (that is, the inner bottom of the outer case bottom 5b). An electronic component cooling fan 15 that pumps cooling air to the heat sink 14 is disposed. Further, air inlets 16, 16... Are formed on the bottom wall (specifically, the outer case bottom 5 b) of the rice cooker body 1 so as to face the electronic component cooling fan 15. Reference numeral 17 denotes a power supply board on which the electronic components are arranged.

  Various switches (for example, a rice cooking switch, a reservation switch, a heat retention switch, etc.) and a liquid crystal display unit are provided on the side opposite to the hinge of the shoulder member 6 (that is, the side where the lock mechanism 18 for locking the lid 2 is provided). The provided operation panel 19 and its operation board 19a are provided. The code | symbol 20 is the code reel arrange | positioned by the vertical position at the rear part side (in other words, hinge side) in the space part 4 of the rice cooker main body 1. FIG.

  On the other hand, the lid 2 is composed of a synthetic resin upper plate 21 constituting the outer surface and a donut-shaped synthetic resin lower plate 22 constituting the inner peripheral portion. This lid 2 is freely rotatable in an arc with respect to the rice cooker body 1 via a hinge pin 23 pivotally supported on one side (ie, the back side) of the shoulder member 6 (in other words, the rice cooker body 1). Is attached. Reference numeral 24 denotes a heat insulating material disposed in the lid 2.

  And the cylindrical part 25 suspended from the said upper board 21 is formed in the approximate center part of the said cover body 2, The inside of this cylindrical part 25 is for discharging | emitting the water vapor | steam generated at the time of rice cooking outside. A steam passage 26 is formed, and a return member 27 is detachably attached to an inlet of the steam passage 26 via a steam packing 28. Reference numeral 29 denotes a steam discharge port.

  The neva return member 27 includes a disc-shaped base 30 having a neva return hole 31 in the center, a short outer annular wall 32 that stands integrally on the outer periphery of the base 30, and the base 30. And a tall inner annular wall 33 erected from the mouth edge of the neva return hole 31, and a steam inlet 34 is formed at the upper end of the outer annular wall 32, A steam circulation port through which the steam S introduced into the outer annular wall 32 circulates through the steam introduction port 34 at a lower portion of the inner annular wall 33 (that is, a portion communicating with the neva return hole 31). 35 is formed. A valve 36 that opens the neva return hole 31 with the weight of the neva only when the neva is returned is attached to the neva return hole 31. The return member 27 is attached by fitting the inner annular wall 33 into a steam packing 28 disposed at the inlet of the steam passage 26.

  Further, a heat radiating plate 37 having a lid heater 38 on the upper surface is attached between the inner edge of the lower plate 22 of the lid 2 and the steam packing 28. The heat radiating plate 37 is made of a heat good conductor such as an aluminum alloy. The inner peripheral edge of the heat radiating plate 37 is formed between the upper end of the outer annular wall 32 of the return member 27 and the lower end of the steam packing 28 by inserting the return member 27 into the steam packing 28. It is supposed to be sandwiched between. Therefore, an air layer A is formed between the lid 2 and the inner lid 39.

  Further, an inner lid 39 that faces the opening of the rice cooker 3 when the lid 2 is closed is detachably attached to the base 30 of the return member 27 with screws 40. The inner lid 39 is made of a heat good conductor such as an aluminum alloy. Reference numeral 41 denotes an upper seal portion 41 a that seals between the lid 2 and the mouth edge of the rice cooker 3, and a lower seal portion 41 b that seals between the peripheral edge of the inner lid 39 and the lid 2. A seal packing 42 is a steam inlet formed in the inner lid 39.

  If it does in this way, after the steam S which generate | occur | produces in the rice cooker 3 at the time of rice cooking flows in into the air layer A between the cover body 2 and the inner cover 39 from the steam inlet 42 of the inner cover 39, it is a return member. 27 is introduced into the outer annular wall 32 through the steam introduction port 34, and then flows into the inner annular wall 33 through the steam circulation port 35, and is discharged from the steam outlet 29 through the steam passage 26. In such a steam discharge process, the pressure in the rice cooker 3 is adjusted, and the neva D discharged together with the steam S is separated from the steam S when flowing into the inner annular wall 33. Then, the valve 36 is opened by the weight of the separated neva and returned to the rice cooker 3 from the neva return hole 36. Therefore, the Neva D is not discharged to the outside of the lid 2 together with the steam S. Further, during rice cooking, the rice cracker is prevented from growing due to contact with the inner lid 39, and during heat retention, the surface temperature of the rice in the rice cooker 3 can be raised by heat radiation from the inner lid 39. In addition, the water droplets adhering to the inner lid 39 are evaporated.

  The state described above (that is, the state in which the inner lid 39 is attached) is a specification with an inner lid, but as shown in FIG. 2, the inner lid 39 is detached from the return member 27, If only the neva return member 27 is inserted into the inlet of the steam passage 26, the steam discharge, rice bar return and pressure adjustment during cooking is the same as the specification with the inner lid, so use it as the specification without the inner lid. Can do.

  By comprising as mentioned above, in one electric rice cooker, the rice cooking by the specification of two types, a specification with an inner lid, and a specification without an inner lid is attained by attaching and detaching the inner lid 39. As a result, the degree of freedom of use for the user is greatly increased and the cost is reduced. Moreover, the specification change between the specification with the inner lid and the specification without the inner lid can be performed by whether or not the inner lid 39 is attached to or detached from the return member 27 inserted into the inlet of the steam passage 26, which is a common member. It becomes possible, and it becomes unnecessary to change the structure of the rice cooker main body 1 or the lid 2.

  By the way, in the specification with an inner lid and the specification without an inner lid, it is desirable to change the heating power of the IH coil 11, the heat retaining heater 13, and the lid heater 38 during rice cooking as shown in Table 1 below. In addition, it is the same at the time of water absorption and cooking.

  The reason for the above is that, when the temperature is raised, in the case of the specification with the inner lid, since the air layer A exists between the inner lid 39 and the lid body 2, the heating power of the lid heater 38 is small. This is because, in the case of the specification without an inner lid, the cover heater 38 is set to a large heating power to increase the heat radiation from the heat radiating plate 37 so as to prepare for the spillage.

  Also, when boiling, in the case of the specification with an inner lid, since the spillage can be prevented by the inner lid 39 and the return member 27, the lid heater 38 is sufficient with a small heating power, and energy saving can be achieved. This is because, in the case of the specification without a lid, it is desirable that the lid heater 38 has a large heating power in order to prevent spillage.

  Further, in the case of the specification with the inner lid, the lid heater 38 is set to have a large heating power at the time of steaming, and the moisture adhering to the inner lid 39 is blown off and it is difficult to cool at the time of heat retention. This is because the heating power of the heater 38 is kept small to prevent the rice surface from being dried too much.

  In addition, in the specifications with an inner lid and the specifications without an inner lid, it is desirable to change the heating power of the IH coil 11, the thermal insulation heater 13, and the lid heater 38 at the time of thermal insulation as shown in Table 2 below.

  The reason for the above is that, in the initial stage of heat insulation, in the case of the specification with the inner lid, the lid heater 38 is used as a large heating power to blow off the water adhering to the inner lid 39. This is because the heating power of 38 is kept small to prevent the rice surface from being dried too much.

  In addition, at the time of stable thermal insulation, in the case of the specification with the inner lid, the lid heater 38 is set to a large heating power to warm the entire inner lid 39 so that moisture does not adhere to the inner lid 39. This is because the surface of the rice becomes hard because it is heated too much, so it is desirable to suppress the heating power to a level that does not cause dew.

Second Embodiment FIGS. 3 to 6 show an electric rice cooker according to a second embodiment of the present invention.

  As shown in FIG. 3, this electric rice cooker is configured so that a rice cooker 3 for cooking rice can be accommodated therein, and has a double structure rice cooker body 1 having a space portion 4, and the rice cooker body 1. And a lid 2 that covers the upper opening of the lid so as to be freely opened and closed.

  The rice cooker body 1 includes an outer case 5 that is an integrally molded product of a synthetic resin including a body portion 5c that constitutes an outer wall and a shoulder portion 5d that constitutes a shoulder portion, and a synthetic resin bottom member that constitutes a bottom portion. 6 and a metal bottomed cylindrical protective frame 7 constituting the inner peripheral wall, and the space 4 is formed surrounded by the outer case 5, the bottom member 6 and the protective frame 7. . In addition, in the said protective frame 7, the said rice cooker 3 is accommodated so that extraction is possible.

  On the inner bottom portion of the protective frame 7, a hot plate type electric heater 43 is disposed that acts as a heating means during rice cooking. The electric heater 43 includes a heat plate 44 made of a good heat conductor and a heating element (for example, a sheathed heater) 45 embedded in the heat plate 44.

  A sensor hole 9 is formed at the center of the hot platen 44 to face the center sensor 8 acting as a temperature detecting means for detecting the temperature of the rice cooker.

  Various switches (for example, a rice cooking switch, a reservation switch, a heat retention switch, etc.) and a liquid crystal display are provided on the anti-hinge side of the outer case shoulder 5b (that is, the side where the lock mechanism 18 for locking the lid 2 is provided) An operation panel unit 19 including a unit and an operation board 19a are provided. The code | symbol 20 is the cord reel arrange | positioned by the vertical position on the rear side (in other words, hinge side) in the space part 4 of the rice cooker main body 1, and 21 is a handle for carrying an electric rice cooker.

  On the other hand, the lid 2 is composed of a synthetic resin upper plate 21 constituting the outer surface and a donut-shaped synthetic resin lower plate 22 constituting the inner peripheral portion. The lid 2 is connected to the rice cooker body 1 via a hinge pin 23 pivotally supported on one side (ie, the back side) of the outer case shoulder 5b (in other words, the rice cooker body 1). It is attached movably.

  A steam cap 46 with a pressure adjusting mechanism having a steam passage 26 inside is attached to the lid 2 at a position from the hinge pin 23.

  Between the inner edge of the lower plate 22 of the lid 2 and the steam packing 28, a heat radiating plate 37 having a lid heater 38 on the upper surface is attached. The heat radiating plate 37 is made of a heat good conductor such as an aluminum alloy. Reference numeral 41 denotes an upper seal portion 41 a that seals between the lid 2 and the mouth edge of the rice cooker 3, and a lower seal portion 41 b that seals between the peripheral edge of the inner lid 39 and the lid 2. It is a seal packing.

  The above configuration is of the specification without an inner lid, and the lid heater 38 in the heat radiating plate 37 is disposed in a portion of the heat radiating plate 37 excluding the portion where the steam cap 46 is attached, as shown in FIG. Therefore, the length of the heater wire of the lid heater 38 can be made sufficiently long.

  By the way, in order to make this electric rice cooker a specification with an inner lid, as shown in FIG. This is done by attaching a lid 39. Therefore, an air layer A is formed between the lid 2 and the inner lid 39. In this case, as shown in FIG. 6, the lid heater 38 in the heat radiating plate 37 is disposed in a portion of the heat radiating plate 37 excluding the portion where the steam cap 46 and the support pin 47 are attached. Accordingly, the length of the heater wire of the lid heater 38 is shorter than that of the case without the inner lid. Reference numeral 42 denotes a steam inlet formed in the inner lid 39.

  If it does in this way, after the steam S which generate | occur | produces in the rice cooker 3 at the time of rice cooking flows in into the air layer A between the cover body 2 and the inner cover 39 from the steam inlet 42 of the inner cover 39, the steam cap 46 is made. It will be discharged to the outside. Further, during rice cooking, the rice cracker is prevented from growing due to contact with the inner lid 39, and during heat retention, the surface temperature of the rice in the rice cooker 3 can be raised by heat radiation from the inner lid 39. In addition, the water droplets adhering to the inner lid 39 are evaporated.

  By configuring as described above, it becomes possible to attach and detach the inner lid 39 only by changing the specification of the heat radiating plate 37 in one electric rice cooker. In one electric rice cooker, there is an inner lid by attaching and detaching the inner lid 39. Cooked rice can be cooked with two types of specifications: a specification and a specification without an inner lid. As a result, the degree of freedom of use for the user is greatly increased and the cost is reduced.

  Further, the length of the heater wire of the lid heater 38 is set to be longer in the case without the inner lid than in the case with the inner lid. That is, in the case of the specification without the inner lid, the arrangement area of the lid heater 38 on the heat radiating plate 37 can be increased. However, in the case of the specification with the inner lid, the arrangement of the lid heater 38 on the heat radiating plate 37 can be performed by changing the specification of the heat radiating plate 37. The installation area must be reduced, and the length of the heater wire of the lid heater 38 can be made longer in the case of the specification without the inner lid than in the specification with the inner lid. As a result, the heating power of the lid heater 38 is smaller in the specification with the inner lid than in the specification without the inner lid, but in the specification with the inner lid, an air layer is formed between the lid body 2 and the inner lid 39. Since A is present, there is no problem even if the heating force is reduced, and the cost is reduced by the amount of shortening of the heater wire.

It is a longitudinal cross-sectional view at the time of specification with an inner lid | cover of the electric rice cooker concerning 1st Embodiment of this invention. It is a longitudinal cross-sectional view at the time of the specification without an inner lid of the electric rice cooker concerning 1st Embodiment of this invention. It is a longitudinal cross-sectional view at the time of the specification without an inner lid of the electric rice cooker concerning 2nd Embodiment of this invention. It is the top view which excised a part at the time of the specification without an inner lid of the electric rice cooker concerning 2nd Embodiment of this invention. It is a longitudinal cross-sectional view at the time of specification with an inner lid | cover of the electric rice cooker concerning 2nd Embodiment of this invention. It is the top view which excised a part at the time of the specification with an inner cover of the electric rice cooker concerning 2nd Embodiment of this invention.

Explanation of symbols

1 is a rice cooker body 2 is a lid 3 is a rice cooker 26 is a steam passage 27 is a return member 37 is a heat sink 38 is a lid heater 39 is an inner lid

Claims (6)

A rice cooker body with a built-in rice cooker, a lid body that covers the rice cooker body so as to be openable and closable, and an inner lid that is detachably attached to the lower surface of the lid body and faces the rice cooker An electric rice cooker characterized in that rice cooking can be performed in two specifications: a specification with an inner lid with the inner lid attached and a specification without an inner lid with the inner lid removed. The inner lid is detachably attached to a return member inserted into the vapor passage inlet of the lid, and in the specification with an inner lid, the insert member is inserted into the vapor passage inlet to insert the return member. 2. The electric rice cooker according to claim 1, wherein an inner lid is attached and only the return member is attached to the steam passage inlet in the specification without an inner lid. A heat sink with a lid heater is attached to the lower surface of the lid, and the output of the lid heater during heat insulation is set to be larger in the case with the inner lid than in the case without the inner lid. The electric rice cooker as described in any one of Claim 1 and 2 characterized by the above-mentioned. A rice cooker body with a built-in rice cooker, a lid body that covers the rice cooker body so as to be openable and closable, and an inner lid that is detachably attached to the lower surface of the lid body and faces the rice cooker By changing the specification of one member constituting the lid body, there are two specifications: a specification with an inner lid with the inner lid attached and a specification without an inner lid with the inner lid removed. An electric rice cooker characterized by being able to cook rice. 5. The electric rice cooker according to claim 4, wherein a heat radiating plate having a lid heater is attached to the lower surface of the lid, and the heat radiating plate is a member whose specification is changed. 6. The electric rice cooker according to claim 5, wherein the length of the heater wire of the lid heater is set to be longer in the specification without the inner lid than in the specification with the inner lid.

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