JP2007312867A - Rice cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rice cooker that can effectively utilize the heat by forming a heat insulating space around a pot of the rice cooker to save energy. <P>SOLUTION: A heat insulating space DS is formed between an inner wall 211 of the main body 2 of the rice cooker and the pot 3 using a heat shield. The heat shield is a heat-resistant elastic member 51 formed by silicon rubber, etc. and the heat insulating space DS is formed by a sealed space formed by dividing a space between the inner wall 211 and the pot 3 by the heat-resistant elastic member 51 fixedly applied in a circular pattern with intervals in the vertical directions of the periphery edge of the inner wall 211 of the main body 2 of the rice cooker abutting against an outer wall of the pot 3. The heat insulating space DS is formed by surrounding a side heater 6 and a metal cover 6a with good thermal conductivity by covering a side heater 6 is mounted on the inner wall 211 of the rice cooker 1 by which the heat-resistant elastic member 51 is supported from both sides and fixedly mounted. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an electric rice cooker, and more particularly to a rice cooker that can effectively use the heat of a heater to realize energy saving. Moreover, it is based on the rice cooker which can prevent rotation of the pan which puts to-be-cooked rice.

In recent years, we have entered an era in which the problems of global warming and environmental pollution must be solved on a global scale. Since global warming is one of the causes of frequent natural disasters, numerical targets for global warming prevention, that is, CO ₂ emissions, are set in each country and region around the world, and the target is achieved. Various measures have been put forward for this purpose, and efforts are being made in Japan to achieve reduction targets under the Kyoto Protocol. Under such circumstances, electric appliances used in ordinary households are also targeted, and electric rice cookers are urgently required to save energy, and rice cookers that have been devised in various ways have been introduced in patent literature.

  For example, as an energy saving measure in a conventional rice cooker, heat insulation between the main body of the rice cooker and the lid is doubled, or a second seal lid is provided outside the first seal lid to dissipate heat from the pan of the pot. There are some which improve the thermal efficiency of rice cookers and reduce power consumption by reducing the amount of rice or by attaching an elastic material member to the flange portion of the pan.

  Moreover, in the conventional rice cooker, like the rice cooker disclosed by the following patent document 1, the upper frame which supports the pan detachably accommodated in the rice cooker body and the side wall surrounding the side surface of the pan There is a configuration in which a cylindrical bobbin is installed on the outer periphery of the side wall and a heating coil is arranged on the outer periphery of the bobbin. This is manufactured by integrally molding the side wall and the upper frame, and there is no gap, and rice cooking power consumption and heat insulation power consumption are reduced.

Furthermore, as in the rice cooker disclosed in Patent Document 2 below, an air layer is provided by hollow molding in the pot storage part to reinforce the heat insulation around the pot and also has a low thermal conductivity at the outer peripheral part of the pot. There is one that forms a heat-insulated structure by molding and eliminates the side heater facing the side of the pan, and forms a resin molded portion except for the bottom of the pan.
JP 11-318696 A (paragraphs [0009], [0010], FIG. 2) JP 2002-440 (paragraphs [0007] to [0009], FIG. 1)

  However, the rice cooker described in Patent Document 1 is manufactured by integrally molding the side wall and the upper frame, and the upper frame mold is complicated and expensive, which is not economical. Moreover, it is troublesome to attach the cylindrical bobbin provided with the side heating coil to the side wall.

  Moreover, the rice cooker of the said patent document 2 manufactures the storage part of a pan by hollow molding, and the storage part itself is expensive, and resin molding with low heat conductivity is given also in the outer peripheral part of a pan. It is necessary to provide a heat insulating structure, which is expensive. Therefore, from the above situation, there is a need for an economically inexpensive rice cooker with a simple structure that has good heat insulation and can save energy.

  As a result of various studies to solve the above problems, the inventor of the present application has formed a heat insulating space between the inner wall of the rice cooker body and the pot accommodated in the body. The rice cooker suitable for energy saving which can aim at the effective use of heat can be completed by preventing the heat | fever from being discharged | emitted outside.

  That is, an object of the present invention is to provide a rice cooker that can effectively use the heat of the heater of the rice cooker and can save energy.

  Moreover, this invention provides the rice cooker which forms heat insulation space around the pot of a rice cooker, aims at effective utilization of heat, and can save energy.

  Moreover, this invention provides the rice cooker which prevents rotation of a pan with the heat resistant elastic member which forms heat insulation space.

  In order to achieve the above object, a rice cooker according to claim 1 of the present invention is a heating device for heating a cooked rice in the pan including a pan to be cooked, an opening for housing the pan, and a side heater. In the rice cooker provided with a rice cooker body having control means for controlling the heating means and cooking the rice to be cooked and keeping the temperature, and a lid for closing the opening of the pan and the rice cooker body, A region between the inner wall of the rice cooker body and the pot accommodated in the rice cooker body by providing a heat shield member between the inner wall of the rice cooker body and the pot accommodated in the rice cooker body. Is a heat insulating space.

  The invention of claim 2 is the rice cooker according to claim 1, wherein the heat shield member is a heat-resistant elastic member, and the heat insulation space is vertically spaced from the peripheral edge of the inner wall of the rice cooker body. A part of the heat-resistant elastic member that is attached and fixed in an annular shape with an opening is stretched and brought into contact with the outer wall of the pan, thereby forming a sealed space that divides the space between the inner wall and the pan. It is characterized by that.

  The invention of claim 3 is the rice cooker according to claim 2, wherein the heat insulating space further includes a bottom portion of the inner side wall of the rice cooker body and the vicinity of the pot bottom of the pan by the lower heat-resistant elastic member. It is also characterized in that it is formed in a sealed space that divides the space between.

  According to a fourth aspect of the present invention, in the rice cooker according to the second aspect, the heat insulating space is formed so as to surround the side heater.

  According to a fifth aspect of the present invention, in the rice cooker according to the second aspect, the upper heat-resistant elastic member is mounted and fixed in the vicinity of the upper end inner edge of the opening of the inner wall of the rice cooker body.

  The invention of claim 6 is the rice cooker according to claim 4, wherein a cover that covers the side heater is attached to the inner wall of the rice cooker, and the heat-resistant elastic member is sandwiched by this attachment. It is characterized by being mounted and fixed.

  The invention of claim 7 is the rice cooker according to claim 6, wherein the cover of the side heater is formed of a metal having good thermal conductivity.

  Invention of Claim 8 is the rice cooker in any one of Claim 2 thru | or 7. Between the upper side heat resistant elastic member of the said heat resistant elastic member, and the lower side heat resistant elastic member, it is the inside of the said rice cooker main body. It is connected with a strip extending in the vertical direction of the wall, and the heat insulating space is attached and fixed to the peripheral edge of the inner wall of the rice cooker in an annular manner, and the inner wall and the strip. It is formed by the sealed space which divided the space between the said pans.

  A ninth aspect of the present invention is the rice cooker according to any one of the first to eighth aspects, wherein the side heater is constituted by an induction heating coil.

  The invention according to claim 10 is the rice cooker according to any one of claims 2 to 9, wherein the heat-resistant elastic member is formed of silicone rubber.

  By providing the above configuration, the present invention has the following excellent effects. That is, according to the invention of claim 1, a pan for containing the cooked rice, an opening for accommodating the pan and a heating means for heating the cooked rice in the pan including the side heater, and the heating means are controlled to cook the cooked rice. In a rice cooker comprising a rice cooker body having a control means for cooking and keeping food, and a lid for closing the opening of the pan and the rice cooker body, the rice cooker body was accommodated in the inner wall and the rice cooker body. By making the space between the pots a heat-insulating space, the heat generated by the heating means is confined in this space and does not escape to the outside. There is no risk of cooling during heat insulation. Therefore, the side surface of the pan is not easily dewed, heating is reduced, and power consumption can be reduced.

  According to the invention of claim 2, the heat shield member is a heat-resistant elastic member, and the heat-insulating space is attached to the peripheral edge of the inner wall of the rice cooker body with a space in the vertical direction and fixed in an annular shape. Since a part of the member extends and abuts against the outer wall of the pan, it is formed by a sealed space that partitions the space between the inner wall and the pan, so the heat generated by the heating means is confined in this space. Therefore, the heat can be effectively used, and the stretched portion of the heat-resistant elastic member serves as an anti-rotation piece for the pan, which is convenient for serving rice.

  According to invention of Claim 3, heat insulation space is formed also in the sealed space which divided the space between the bottom part of the inner side wall of a rice cooker main body, and the pan bottom vicinity of a pan with the heat-resistant elastic member of the lower side further. Therefore, the heat insulation space that confines the heat generated by the main heater can prevent the heat in the heat insulation space from being released to the outside, and can further effectively use the heat. Accordingly, less pot heating is required, and power consumption can be reduced.

  According to the invention of claim 4, the heat insulation space is formed so as to surround the side heater, so that heat generated in this space is prevented from being released to the outside, and more effective by effective use of heat. Heating can be achieved.

  According to the invention of claim 5, the upper heat-resistant elastic member is mounted and fixed in the vicinity of the upper edge of the upper end of the opening of the inner wall of the rice cooker body, so that there is a gap between the pan into which the outside air enters and the rice cooker body opening. It is possible to more effectively suppress the heat radiation from this gap by closing the vicinity of the entrance with a heat insulating space.

  According to the invention of claim 6, since the heat insulating space is provided with a cover that covers the side heater on the inner wall of the rice cooker, and by this attachment, the heat resistant elastic member is sandwiched and fixed, so the side heater This heat is reliably confined in this space and is directed to the heating of the pan through the cover of the side heater, so that the pot can be effectively heated. In addition, since heat radiation to the outside of the heat in the heat insulation space is stopped, the amount of heat generation can be saved and energy saving can be achieved. Further, the side heater can be easily assembled, and the number of manufacturing steps can be reduced.

  According to the invention of claim 7, since the cover of the side heater is formed of a metal having a good thermal conductivity, the heat conduction to the pan is good and the efficient use of heat can be achieved.

  According to the invention of claim 8, the upper heat resistant elastic member and the lower heat resistant elastic member of the heat resistant elastic member are connected by a strip extending in the vertical direction of the inner wall of the rice cooker body, The heat insulation space is formed by a sealed space that partitions the space between the inner wall and the strip and the pan by attaching and fixing the strip to the peripheral edge of the inner wall of the rice cooker in an annular shape, so the rice cooker body Due to the double wall material of the side wall and the strip, the heat radiation in the heat insulation space can be more effectively prevented from radiating to the outside. In addition, since the heat-resistant elastic member and the strip are formed integrally, it is easy to attach to the inner wall of the rice cooker. One anti-rotation piece can be attached, and the attachment is simple and easy.

  According to the ninth aspect of the present invention, since the side heater is composed of the induction heating coil, the pot can be effectively heated without affecting the inner case.

  According to the invention of claim 10, since the heat resistant elastic member is formed of silicone rubber, a member having both heat resistance and durability can be used.

  Hereinafter, the best embodiment of the present invention will be described with reference to the drawings. However, the embodiment shown below exemplifies a rice cooker for embodying the technical idea of the present invention, and is not intended to identify the present invention as this rice cooker. The present invention can be equally applied to the other embodiments included in the scope.

FIG. 1 is a cross-sectional view of a rice cooker according to an embodiment of the present invention. FIG. 2 is a partial cross-sectional view of the rice cooker body and pan. FIG. 3 is a partial cross-sectional view of a rice cooker body and a pan according to another embodiment. FIG. 4 is a partial cross-sectional view of a rice cooker body and a pan according to still another embodiment. FIG. 5 is a partial cross-sectional view of a rice cooker body and a pan according to another embodiment. FIG. 6 is a partial cross-sectional view of a rice cooker body and a pan according to still another embodiment. As shown in FIG. 1, a rice cooker 1 according to an embodiment of the present invention includes a pan 3 into which a rice to be cooked is placed, An opening for accommodating the pan 3 in a detachable manner, a heating means such as an induction heating coil 5 and a side heater 6 for heating the cooked rice in the pan 3, and a vent hole 23a provided on the bottom surface and communicating with the outside of the rice cooker 1. And a rice cooker body 2 having an exhaust hole 23b, a lid 4 that closes the openings of the pan 3 and the rice cooker body 2, an induction heating coil 5, a side heater 6 and the like, and heating means such as a side heater 6 are controlled to cook rice to be cooked. And control means for performing heat insulation. The rice cooker body 2 is provided with a shutter mechanism 25 for opening and closing the vent hole 23a and the exhaust hole 23b, and the control means opens the vent hole 23a and the exhaust hole 23b while the temperature inside the rice cooker body 2 is equal to or higher than a predetermined temperature. A mechanism may be provided that controls the shutter mechanism 25 so as to close the vent hole 23a and the exhaust hole 23b during a period of a predetermined temperature or less.

  The rice cooker main body 2 has a bottomed cylindrical inner case 21 formed of a nonmetallic material that accommodates the pot 3 and an outer case 22 that covers the inner case 21. 3 is detachably accommodated. The inner case 21 is formed with a flange 21a protruding at the upper end thereof in the outer peripheral direction. A flange 31 protruding in the outer peripheral direction is formed in the upper end opening of the pan 3, and the flange 31 is placed so as to be hooked on the flange 21 a of the inner case 21. In the outer periphery near the bottom of the inner case 21, an induction heating coil 5 as a main heating means is disposed. The induction heating coil 5 is supported by a coil cover (not shown) formed of a heat resistant resin material so that the distance to the outer peripheral surface of the pan 3 is constant. Further, a side heater 6 is disposed in the inner case 21 between the upper opening and the induction heating coil 5.

  The lid 4 has a configuration in which a front lid 41 and a lid cover 48 are respectively attached to the top and bottom of the frame body 42, and an inner lid 43 is attached to the frame body 42 via the lid cover 48. It is attached so as to cover the upper opening of the case 21. The attachment has the structure which supported the frame 42 on the rice cooker main body 2 using the hinge member 44 and the pivot pin 45. As shown in FIG. Between the frame body 42 and the inner lid 43, a lid heater 49 is disposed so as to be covered with a lid cover 48, and a lid temperature sensor (not shown) is provided. Furthermore, the inner lid 43 is equipped with a pressure adjustment valve 4a and a safety valve 4b for adjusting the pressure in the rice cooker body 2. The lid cover 48 is fixed to the frame body 42, and the inner lid 43 covers the lid cover 48 and is detachably supported by the frame body 42. The pressure regulating valve 4a is actuated in a boiling maintaining process among a series of rice cooking processes by a solenoid (not shown). The top lid 41 is detachably mounted with a spillover prevention lid 4c that prevents the cooked rice in the pan 3 from spilling out and jumping out at once.

  Around the outer periphery of the inner lid 43, a pot packing 46 that seals the flange portion 31 of the pot 3 and the inner lid 43 is supported and attached to the outer frame 50. Further, a locking member 47a formed at the upper end of the inner case 21 is provided on the opposite side of the hinge member 44, and is locked by a locking lever 47b provided on the frame body 42 to close the lid body 4. Supports the state. When the pot 3 is accommodated in the rice cooker body 2 and covered with the lid 4, the pot packing 46 is pressed against the opening edge of the pot 3 and the pot 3 is closed.

  In the rice cooker body 2, the operation plate 7 is mounted on the front surface of the outer case 22. The operation plate 7 is provided with operation buttons such as a power switch 7a, a rice cooking start switch, a menu selection switch, a heat retention switch and the like (not shown) and a display panel 7b. On the panel 7b, a rice cooking menu selected by an electronic component (not shown) attached to the operation control board 8 is displayed.

  In the rice cooker body 2, a power supply control board 10 for supplying and controlling power to the induction heating coil 5, the side heater 6, the lid heater 49, and the like is disposed at a location close to the vent hole 23a. Electronic components such as inverters, switching elements, and timer elements made of semiconductor elements are mounted on the power supply control board 10. Among these electronic components, the inverter 9 generates heat during operation, and is cooled by a heat sink or a cooling fan. The rice cooker body 2 is provided with a temperature detection sensor 32 at the center of the bottom 23 so as to be in contact with the bottom surface of the pan 3. Further, either the rice cooker body 2 or the lid 4 is provided with an outside air temperature sensor (not shown) that detects the outside air temperature. The output of the outside air temperature sensor is input to the control device, and the cooling fan 11 or the shutter mechanism 25 is operated.

  The bottom portion 23 of the rice cooker main body 2 is formed with a vent hole 23a for sucking air and an exhaust hole 23b for discharging the sucked air, and the cooling fan 11 is disposed at a position close to the vent hole 23a. The cooling fan 11 is operated by a motor (not shown).

  The vent hole 23a and the exhaust hole 23b are formed in the bottom 23 by a plurality of narrow grooves having a predetermined width and length, so-called slits. The vent holes 23a and the exhaust holes 23b made of these slits are opened and closed by opening / closing doors made of a plate-like body having a width and a length that block the respective slits, that is, shutter plates 23a 'and 23b'. The shutter plates 23a 'and 23b' are connected to the operation plate 24, and the operation plate 24 is moved by the solenoid 12 to open and close the vent hole 23a and the exhaust hole 23b. The operation plate 24 is slidable at the bottom while being guided by a guide mechanism 26 provided at the bottom 23 of the rice cooker body. The shutter mechanism 25 includes an operation plate 24 having shutter plates 23 a ′ and 23 b ′ and a solenoid 12 that operates the operation plate 24.

  The present invention controls, for example, a heating pot and a heating means including a pan 3 in which the above-described cooked rice is placed, an opening that accommodates the pan 3, and a side heater 6 that heats the cooked rice in the pan 3. As shown in FIG. 2, in the rice cooker 1 provided with a rice cooker body 2 having a control means for performing rice cooking and heat retention control of the cooked rice, and a lid 3 for closing the opening of the pot 3 and the rice cooker body 2. Moreover, between the inner wall 211 of the rice cooker main body 2 and the pan 3 accommodated in the rice cooker main body 2, the side heater 6 is surrounded to form a heat insulation space DS. This heat insulation space DS is arranged on the inner wall 211 of the inner case 21 of the rice cooker body 2 with a heat-resistant elastic member 51 that is vertically arranged with a space in the vertical direction and is attached and fixed over the entire circumference. 3 is a sealed space formed between the two. Since the heat generated by the side heater 6 is confined in this space and does not escape to the outside, the pan 3 is not cooled when cooking and keeping warm. Power consumption can be reduced.

  The heat insulation space DS is also formed near the bottom of the inner wall 211 of the rice cooker body 2 and the bottom of the pot 3 by the lower one of the heat resistant elastic members 51. In this portion, the heat generated by the induction heating coil 5 as the main heating means is prevented from being released from the heat insulating space DS to the outside. Accordingly, the amount of heat for heating the pan 3 can be reduced, and the power consumption can be reduced.

  Further, as shown in FIG. 3, the heat insulation space DS is formed by a sealed space formed between the inner wall 211 of the inner case 21 of the rice cooker body 2 surrounding the side heater 6 and the cover 6 a of the side heater 6. It is formed. The inner case 21 is formed of a synthetic resin with good heat retention, and the cover 6a of the side heater 6 is made of a metal such as aluminum or copper with good thermal conductivity so as to efficiently transfer heat to the pan 3 side. It is formed. The cover 6a of the side heater 6 is fitted and attached to the inner case 21 via a heat-resistant elastic member 51 which is attached and fixed above and below a recess 21d formed over the entire circumference of the inner case 21. In this case, the heat insulation space DS is formed by the heat-resistant elastic member 51 that extends in the inner direction along the upper edge flange of the opening of the rice cooker body 2 and contacts the side surface of the pan so as to suppress heat dissipation to the outside. Yes.

  One end of the heat-resistant elastic member 51 that seals the heat insulating space DS is in contact with the outer surface of the pot 3 that is extended and accommodated from the inner wall 211 of the inner case 21, and has a function of holding the pot 3 by friction and preventing its rotation. It also serves as an anti-rotation piece. As the heat resistant elastic member 51, silicone rubber having heat resistance and durability is preferable, but other members may be used. When the cooked rice is agitated using rice scoop or swung from a pot with a teacup, the pot may rotate, making it difficult to work. In such a case, if you have to hold rice bowl with one hand while holding the pot with one hand, the action of holding the pot and the action of holding the bowl become inconvenient. In addition, there is a risk of burns if the pan is hot. Conventionally, a special device is attached to the flange of the inner case so that the pan does not rotate, or a micro switch that detects opening and closing of the lid on the rice cooker body and a plunger that is linked to ON / OFF of the switch A rubber elastic body is attached to the tip of the plunger, and when the lid is opened, it is detected by a switch. The plunger operates in conjunction with the detection of the switch, the rubber elastic body protrudes and abuts the pan to hold the pan. To prevent rotation. However, according to said rotation prevention piece 51, rotation of a pan can be prevented easily and cheaply without providing a complicated apparatus like the past.

  The heat insulating space DS shown in FIG. 3 is a sealed space surrounded by a recessed portion provided on the inner side wall 211 of the inner case 21 for mounting the side heater 6 and the cover 6 a of the side heater 6. Even if it is a sealed space, there may be a gap in the fitting portion of each member, the lead terminal outlet of the side heater 6, the mounting portion of various sensors, and the like. The heat insulating space DS incorporates the side heater 6 and surrounds the side heater 6 by creating a space around the side heater 6 and acts to prevent the heat inside the space from being released to the outside. The heat of the side heater 6 is transmitted to the pan 3 through the cover 6a having good thermal conductivity, and is used for heating and keeping the pan 3 warm. In FIG. 3, the upper end of the heat insulating space DS has reached a position in contact with the flange 21 b of the inner case 21. As a result, the heat insulation space DS occupies a portion of the space between the pot 3 and the inner case 21 that is closest to the outside air and that has a large amount of heat release, so that a more effective heating and heat retention effect can be obtained.

  The cover 6a of the side heater 6 is attached and fixed to the inner case 21 of the rice cooker body 2 via a heat resistant elastic member 51 so as to form an airtight heat insulating space DS. The cover 6a is provided so as to form an inner wall surface of the rice cooker body 2. The cover 6a is formed with bent portions 6b so as to generate elasticity at both upper and lower ends of a metal plate such as aluminum or copper, and can be fixed by being fitted into a predetermined portion of the inner case 21. Between the lower surface of the flange 21b protruding in the inner circumferential direction opposite to the flange 21a formed at the upper end of the inner case 21 and the shelf-like portion 21c at the lower end of the recess formed in the inner wall 211 of the inner case 21 Further, the bent portion 6b of the cover 6a is fitted with a heat-resistant elastic member 51 that also serves as an anti-rotation piece interposed. Providing a wide rotation-preventing piece has the effect of suppressing heat dissipation from the gap because the extended portion 51b closes the entrance of the gap between the pot 3 and the inner wall 211 into which the air enters.

  As shown in FIGS. 3 and 4, the heat-resistant elastic member 51 is a molded body of silicone rubber having an extended portion 51 b that forms a sealed heat-insulating space DS. The extending part 51b, which is thinner than the base part from the base part 51a having a square cross section, is mounted and fixed by being sandwiched between the cover 6a of the side heater 6 and the inner case 21 of the rice cooker main body, so that the heat insulating space DS is formed. While being formed, the extended portion 51 b is exposed to the inside of the inner case 21. The extended portion 51b has a certain degree of elasticity, and has a strength that protrudes straight inside the inner case 21 when the pan 3 is not inserted. Can do. In FIG. 4, the cover 6a is fitted and attached to the recess 21d provided on the inner side wall of the inner case 21, and the heat resistant elastic member 51 is also attached at the same time as the cover 6a is attached. The heat resistant elastic member 51 is firmly attached together with the rotation preventing piece.

  5 shows that the heat insulation space DS is provided at a position slightly lower than the flange 21a, but a strip-shaped silicone rubber strip 51c is applied to the inner wall surface of the recess 21d to enhance the heat insulation effect. Is. On the upper and lower portions of the strip 51c, extending portions 51b of the heat-resistant elastic member 51 serving as a rotation preventing piece of the pan 3 are formed. The double wall material of the wall of the inner case 21 and the strip 51c enhances the heat insulation, and more reliably prevents the heat of the heat insulation space DS from being radiated to the opposite side to the pan. The heat resistant elastic member 51 is attached to the inner case 21 by pressing the strip 51c portion against the recessed portion of the inner side wall 211 of the inner case 21 by the cover 6a of the side heater 6 and fixing the extended portion 51b to the inner case 21. It is made to expose inside. According to this, it can attach stably by presence of the strip 51c, and positioning of the up-and-down extending part 51b is easy. Note that the cover 6a of the side heater 6 does not necessarily have to be rounded at both ends, and may be bent into a square shape to hold the heat-resistant elastic member 51 serving as an anti-rotation piece.

  In addition, although the example in which the heat insulating space DS surrounding the side heater 6 is provided in a part of the inner case 21 of the rice cooker body 2 is described above, the heat insulating space DS is not necessarily provided integrally. It is not limited to a part of the inner case 21, but as shown in FIG. 6, the rice cooker main body composed of a member 21d different from the inner case 21 is convenient for assembling the rice cooker main body 2. The inner wall 211 may be used.

  As described above, the present invention aims at effective use of heat in the heat insulation space by forming a heat insulation space around the pan accommodated in the rice cooker body. The heat insulating space is formed by a sealed space formed between the inner side wall of the rice cooker body and the pan, near the bottom of the pan or between the inner side wall of the rice cooker body surrounding the side heater and the cover of the side heater. In order to confine heat in these spaces and prevent it from being released to the outside and directing it to heat the pot, it is possible to heat the pot effectively. In other words, since heat radiation to the outside of the heat in the heat insulating space is stopped, the amount of heat generated by the side heater during heating or heat retention can be reduced accordingly, and energy saving can be achieved.

  The side heater 6 may be an induction heating method. In the case of induction heating, the heating coil of the side heater 6 is formed concentrically by insulating a litz wire, which is made of copper wires close to each other, with an insulating material such as polyurethane. Place multiple pieces on and fix them. When a high-frequency current is supplied to the heating coil from the inverter 9 mounted on the power supply control board 10, an alternating magnetic field is generated in the heating coil, and an eddy current is generated in the pan 3 located in the magnetic field. The eddy current is converted into Joule heat, the pan 3 generates heat, and the cooked rice is heated. The cover 6a may be formed of a heat resistant resin. Since it is covered with the inner wall 211 and the cover 6a, not only the heat of the pan 3 but also the heat of the heating coil itself can be used for heating and keeping the pan 3.

  Further, in the present invention, by a simple configuration of mounting a heat-resistant elastic member used to make a heat insulation space on the inner wall surface of the rice cooker body, the extending portion comes into contact with the outer surface of the pan into which the rice to be cooked is placed, Although it is possible to prevent the pan from rotating when the rice is served, in this case, it is not necessary to apply special processing to the pan, which is easy to implement. And it is not necessary to hold down a pot at the time of serving, and can provide a rice cooker that is easy to handle.

  In addition, since the extending portion of the heat-resistant elastic member can be attached together with the attachment of the side heater cover, no special man-hours are required and it can be attached at low cost. For this reason, the manufacturing price of a rice cooker can be reduced.

FIG. 1 is a cross-sectional view of a rice cooker according to an embodiment of the present invention. FIG. 2 is a partial cross-sectional view of the rice cooker body and the pan according to the example. FIG. 3 is a partial cross-sectional view of a rice cooker body and a pan according to another embodiment. FIG. 4 is a partial cross-sectional view of a rice cooker body and a pan according to still another embodiment. FIG. 5 is a partial cross-sectional view of a rice cooker body and a pan according to another embodiment. FIG. 6 is a partial sectional view of a rice cooker body and a pan according to still another embodiment.

Explanation of symbols

2 Rice cooker body 3 Pot 4 Lid 5 Induction heating coil 6 Side heater 6a Cover 6b Bent part 21 Inner case 21a Flange 21b Flange 21c Shelf-like part 22 Outer case 51 Heat resistant elastic member 51a Base 51b Stretched part 51c Strip DS Insulation space

Claims (10)

  A pot for containing the cooked rice, an opening for accommodating the pan and a heating means for heating the cooked food in the pan including a side heater, and a control for controlling the heating means to cook the rice to be cooked and keeping warm. In a rice cooker comprising a rice cooker body having means, and a lid for closing the opening of the pot and the rice cooker body, between the inner wall of the rice cooker body and the pot accommodated in the rice cooker body By providing a heat-shielding member, the region between the inner wall of the rice cooker body and the pot accommodated in the rice cooker body is used as a heat insulating space.   The heat-shielding member is a heat-resistant elastic member, and the heat-insulating space is partially extended from the peripheral edge of the inner wall of the rice cooker body with a space in the vertical direction and fixed in an annular shape. The rice cooker according to claim 1, wherein the rice cooker is formed by a sealed space that partitions a space between the inner wall and the pot by contacting the outer wall of the pot.   The heat-insulating space is also formed in a sealed space that divides a space between the bottom portion of the inner wall of the rice cooker body and the vicinity of the bottom of the pan by the lower heat-resistant elastic member. The rice cooker according to claim 2.   The rice cooker according to claim 2, wherein the heat insulation space is formed to surround the side heater.   The rice cooker according to claim 2, wherein the heat-resistant elastic member on the upper side is attached and fixed in the vicinity of the upper end inner edge of the opening of the inner wall of the rice cooker body.   The rice cooker according to claim 4, wherein a cover that covers the side heater is attached to an inner wall of the rice cooker, and the heat-resistant elastic member is sandwiched and fixed by this attachment.   The rice cooker according to claim 6, wherein the cover of the side heater is formed of a metal having good thermal conductivity.   The upper heat-resistant elastic member and the lower heat-resistant elastic member of the heat-resistant elastic member are connected by a strip extending in the vertical direction of the inner wall of the rice cooker body, and the heat insulating space is the strip. It is formed by the sealed space which divided the space between the inner wall and the strip, and the pan by attaching and fixing a piece to the peripheral edge of the inner wall of the rice cooker annularly. Item 8. A rice cooker according to any one of Items 2 to 7.   The rice cooker according to any one of claims 1 to 8, wherein the side heater includes an induction heating coil.   The rice cooker according to any one of claims 2 to 9, wherein the heat-resistant elastic member is formed of silicone rubber.

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